CN111040948B - Liquid changing device for multicellular co-culture simulated weightlessness experiment - Google Patents
Liquid changing device for multicellular co-culture simulated weightlessness experiment Download PDFInfo
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- 239000007788 liquid Substances 0.000 title claims abstract description 68
- 238000002474 experimental method Methods 0.000 title claims abstract description 14
- 238000003501 co-culture Methods 0.000 title claims abstract description 13
- 238000004113 cell culture Methods 0.000 claims abstract description 69
- 230000005540 biological transmission Effects 0.000 claims abstract description 60
- 230000007246 mechanism Effects 0.000 claims abstract description 19
- 238000004873 anchoring Methods 0.000 claims description 4
- 238000004088 simulation Methods 0.000 abstract description 28
- 239000001963 growth medium Substances 0.000 abstract description 10
- 230000028327 secretion Effects 0.000 abstract description 6
- 238000009825 accumulation Methods 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- 230000029142 excretion Effects 0.000 abstract description 2
- 235000006286 nutrient intake Nutrition 0.000 abstract 1
- 230000005484 gravity Effects 0.000 description 43
- 210000004027 cell Anatomy 0.000 description 36
- 238000005192 partition Methods 0.000 description 9
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- 239000012530 fluid Substances 0.000 description 4
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- 210000004748 cultured cell Anatomy 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
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- 230000008569 process Effects 0.000 description 3
- 108090000623 proteins and genes Proteins 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
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- 230000004323 axial length Effects 0.000 description 2
- 230000004071 biological effect Effects 0.000 description 2
- 239000012472 biological sample Substances 0.000 description 2
- 230000001413 cellular effect Effects 0.000 description 2
- 238000012258 culturing Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000013632 homeostatic process Effects 0.000 description 2
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- 238000012986 modification Methods 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 210000000748 cardiovascular system Anatomy 0.000 description 1
- 239000006143 cell culture medium Substances 0.000 description 1
- 230000003915 cell function Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 210000002889 endothelial cell Anatomy 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 239000002609 medium Substances 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 210000000963 osteoblast Anatomy 0.000 description 1
- 210000002997 osteoclast Anatomy 0.000 description 1
- 230000003076 paracrine Effects 0.000 description 1
- 230000035790 physiological processes and functions Effects 0.000 description 1
- 210000002027 skeletal muscle Anatomy 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- C12M23/00—Constructional details, e.g. recesses, hinges
- C12M23/34—Internal compartments or partitions
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M29/00—Means for introduction, extraction or recirculation of materials, e.g. pumps
- C12M29/18—External loop; Means for reintroduction of fermented biomass or liquid percolate
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Abstract
The invention discloses a liquid exchange device for a multicellular co-culture simulated weightlessness experiment, which comprises a gear, a gear rod, a spring stay wire, a spring, a piston, a second transmission mechanism for driving the pistons in the two liquid exchange devices to synchronously move, and a second power unit for providing power for the second transmission mechanism and the rotation of the gear; the gear is connected with the gear rod; the piston is arranged in the inner cavity of the cell culture device needing liquid exchange; one end of the spring is pressed against the piston, and the other end of the spring is fixed in the inner cavity of the cell culture device needing liquid exchange; one end of the spring stay wire is wound on the gear rod, and the other end of the spring stay wire penetrates through the spring to be connected with the piston. Solves the problems that the circulation of culture solution and cell secretion is difficult when the cells growing in different environments are co-cultured, and the long-time rotation simulation weightlessness is difficult due to nutrient consumption of the culture medium and accumulation of cell excretion wastes in the rotation simulation weightlessness experiment.
Description
Technical Field
The invention belongs to the field of biomechanical experimental equipment, and particularly relates to a liquid exchange device for a multicellular co-culture simulated weightlessness experiment.
Background
The microgravity environment generated in the aerospace flight can cause a series of changes of the cardiovascular system, the skeletal muscle system and the like of a human body, and the physical health of astronauts is seriously endangered. Therefore, the research on the characteristics and the rules of the physiological change of the human body under the microgravity has very important significance, especially on the cellular level and the molecular level, and the deep research on the generation mechanism of the human body. In view of the limitations of space flight opportunities and costs, gyrators are widely used at home and abroad to simulate the microgravity effect of cell level on the ground. On the gyrator, the biological sample is still in the gravitational field, subject to a constant gravity vector. However, as the gyrator rotates around the horizontal shaft, the movement direction of the biological sample carried by the gyrator is changed continuously and is not responsive to gravity in a certain direction all the time, so that the microgravity biological effect of cells under the aerospace flight condition is simulated. The gyrator provides an economic and efficient way for developing the cell level biological effect and the generation mechanism under the simulated microgravity condition on the ground, but the existing gyrator is limited when being used for the simulated weightlessness experiment under the multicellular co-culture condition.
The mutual regulation and control of cells of the same tissue or different tissues through paracrine or remote secretion is an important mode of the organism to exert physiological functions and maintain homeostasis, for example, in the aspect of maintaining bone homeostasis, the mutual regulation and control relationship exists among neovascular endothelial cells, osteoblasts and osteoclasts, and the regulation and control relationship is obviously changed in the microgravity environment. When the main change or the source change of which cells are subjected to specific research in the microgravity environment so as to influence the functions of other tissues and cells, one cell needs to be cultured in a simulated weightlessness environment respectively, then the influence of cell secretion on the functions of another cell which is normally cultured is detected, but the existing gyrator cannot synchronously realize the research process. A device is thus designed that is capable of transferring cellular fluids from one simulated environment to another.
Disclosure of Invention
In order to solve the defects in the prior art, the invention aims to provide a liquid exchange device for a multi-cell co-culture simulated weightlessness experiment, which solves the two problems of liquid exchange during normal gravity and simulated microgravity co-culture.
In order to solve the technical problems, the invention adopts the following technical scheme:
The liquid exchange device comprises a gear, a gear rod, a spring stay wire, a spring, a piston, a second transmission mechanism for driving the pistons in the two liquid exchange devices to synchronously move, and a second power unit for providing power for the second transmission mechanism and the rotation of the gear;
The gear is connected with the gear rod; the piston is arranged in the inner cavity of the cell culture device needing liquid exchange; one end of the spring is pressed against the piston, and the other end of the spring is fixed in the inner cavity of the cell culture device needing liquid exchange; one end of the spring stay wire is wound on the gear rod, and the other end of the spring stay wire penetrates through the spring to be connected with the piston.
Specifically, the second transmission mechanism comprises a fourth bevel gear, two gear bearings, a third transmission rod, a fourth transmission rod and a fifth bevel gear;
The gear type bearing is formed by a bearing, a conical surface arranged on the outer ring of the bearing, straight teeth on the conical surface and straight teeth on the bottom surface of the outer ring of the bearing; the gear can be meshed with straight teeth on the bottom surface of the gear type bearing outer ring;
the two ends of the third transmission rod are respectively provided with a fifth bevel gear, and the fifth bevel gears at the two ends of the third transmission rod are respectively meshed with the fourth bevel gear and straight teeth on the conical surface of one gear type bearing;
The two ends of the fourth transmission rod are respectively provided with a fifth bevel gear, and the fifth bevel gears at the two ends of the fourth transmission rod are respectively meshed with the fourth bevel gear and straight teeth on the conical surface of the other gear type bearing; the fourth bevel gear is connected with the second power unit.
Specifically, the gear rod is anchored outside the cell culture device needing liquid exchange through an anchoring shaft sleeve.
Further, the novel gear brake further comprises a gear brake rod which generates a braking effect on the gear, one end of the gear brake rod is anchored through the shaft sleeve structure, and the other end of the gear brake rod rotates around the anchoring point.
Compared with the prior art, the invention has the beneficial effects that:
(1) According to the invention, by arranging the replacement liquid system, fresh culture medium gradually flows into the cell culture cavity from the inner cylinder of one cell culture device, and old culture medium gradually returns to the inner cylinder from the cell culture chamber cavity of the other cell culture device, so that the problem that the rotation simulation weightlessness is difficult to carry out for a long time due to nutrient substance consumption of the culture medium and accumulation of cell excretion waste in the rotation simulation weightlessness experiment is solved.
(2) The cell culture device can be respectively arranged on a rotary simulated weightlessness unit and a driven normal gravity unit to respectively culture different cells, and the rotary simulated weightlessness unit generates a simulated weightlessness effect by rotating at a uniform speed around a horizontal shaft; the normal gravity unit is driven by the transmission device to reversely rotate around the vertical shaft at the same speed as the rotary simulation weightlessness unit, so that the condition of the gravity borne by the cells is not changed; the automatic liquid changing device can slowly control the culture medium to circulate between the cell culture device on the rotary simulated weightlessness unit and the cell culture device on the normal gravity unit, so that the problem that two different cells are difficult to co-culture under different gravities (normal gravity and simulated microgravity) in the research of microgravity molecular biology is solved.
(3) According to the invention, the cell culture environment is isolated into relatively independent micro spaces by arranging the cell culture chamber partition plate in the cell culture device, so that the problems that the conventional gyrator has large volume and few cultured cells, and cell secretion substances are easily diluted and normal physiological effects cannot be exerted on co-cultured cells are solved; on the other hand, the separated relatively independent micro-spaces can minimize the problem that the culture genes in the gyrator have bubbles and are easy to generate fluid shearing force.
Drawings
Fig. 1 is a schematic view of a liquid changing apparatus according to an embodiment of the present invention.
FIG. 2 is a schematic diagram showing the overall structure of an experimental apparatus according to an embodiment of the present invention.
FIG. 3 is a schematic diagram showing the structure of a cell culture apparatus according to an embodiment of the present invention.
FIG. 4 is a schematic diagram showing connection between an inner tube of a cell culture apparatus and a liquid changing device according to an embodiment of the present invention.
FIG. 5 is a top view of a cell culture apparatus according to an embodiment of the invention.
Description of the reference numerals in the drawings:
The device comprises a 1-rotation simulation weightlessness unit, a 2-normal gravity unit, a 3-cell culture device, a 4-liquid exchange device, a 5-first power unit, a 6-first transmission mechanism, a 7-Y-shaped liquid passing pipe, an 8-hose, a 9-second transmission mechanism, a 10-second power unit, an 11-bracket, a 12-bearing, a 13-controller, a 14-supporting shaft sleeve and a 15-supporting rod;
101-a first bevel gear and 102-a first fixing frame;
201-a second bevel gear, 202-a second fixing frame;
301-outer cylinder, 302-inner cylinder, 303-cylinder cover, 304-partition plate, 305-cell climbing sheet, 306-first cavity, 307-second cavity, 308-liquid through hole;
401-gear, 402-gear lever, 403-spring wire, 404-spring, 405-piston, 406-anchor sleeve, 407-gear brake lever;
601-a first transmission rod, 602-a second transmission rod, 603 a third bevel gear;
901-fourth bevel gear, 902-gear bearing, 903-third transmission rod, 904-fourth transmission rod, 905-fifth bevel gear, 906-fixed rod;
1101-base, 1102-side panels, 1103-top panel.
Detailed Description
The following specific embodiments of the present application are provided, and it should be noted that the present application is not limited to the following specific embodiments, and all equivalent changes made on the basis of the technical scheme of the present application fall within the protection scope of the present application.
Example 1
As shown in fig. 1 and fig. 4, the embodiment discloses a liquid exchange device for a multicellular co-culture simulation weightlessness experiment, which comprises a gear 401, a gear rod 402, a spring stay 403, a spring 404, a piston 405 and a second transmission mechanism 9 for driving the two liquid exchange devices to synchronously move. The gear lever 402 is supported on the cell culture vessel 3 requiring liquid exchange, specifically: both ends of the gear lever 402 are anchored to the cover 303 of the cell culture apparatus 3 in the above-described embodiment by means of anchor bosses 406. The gear 401 is connected with the gear rod 402, the piston 405 and the spring 404 are arranged in the first cavity 306, one end of the spring stay 403 is wound on the gear rod 402, the other end of the spring stay 403 passes through the spring 404 to be connected with the piston 405, the piston 405 can slide along the axial direction of the inner cylinder 302 without gaps, and the piston 405 presses the spring 404 when moving towards the gear rod 402. The gear rod 402 can wind or unwind the spring wire 403 when rotating, and the piston 405 is controlled to slide in the axial direction of the inner cylinder 302 with the aid of the elastic force of the spring 404.
The piston 405 of the liquid outflow side pushes the liquid to flow out through the second transmission mechanism 9 in the liquid exchange process, and the piston 405 of the liquid inflow side synchronously sucks the liquid to enter, so that the internal pressure of the liquid cannot be changed. Specifically, the second transmission mechanism 9 includes a fourth bevel gear 901, two gear bearings 902, a third transmission rod 903, a fourth transmission rod 904, and a fifth bevel gear 905; the gear type bearing 902 is formed of a bearing, a tapered surface provided on the outer race of the bearing, straight teeth provided on the tapered surface, and straight teeth provided on the bottom surface of the outer race of the bearing, and in this embodiment, the teeth provided on the tapered surface are straight teeth. The gear 401 is capable of meshing with straight teeth on the bottom surface of the outer race of the gear-type bearing 902. The gear-type bearing 902 of this embodiment is generally fitted around the cell culture vessel 3 and the gear-type bearing 902 does not interfere with the cell culture vessel 3, so that the inner diameter of the gear-type bearing 902 is larger than the diameter of the outer tube 301. In the present embodiment, the inner rings of the two gear bearings 902 are mounted on the side plates 1102 and the top plate 1103, respectively, by the fixing rods 906.
The fifth bevel gears 905 are respectively arranged at the two ends of the third transmission rod 903, and the fifth bevel gears 905 at the two ends of the third transmission rod 903 are respectively meshed with the fourth bevel gears 901 and bevel teeth on one gear type bearing 902.
The fifth bevel gears 905 are respectively arranged at the two ends of the fourth transmission rod 904, and the fifth bevel gears 905 at the two ends of the fourth transmission rod 904 are respectively meshed with the fourth bevel gears 901 and the bevel teeth on the other gear type bearing 902. The fourth bevel gear 901 is connected to the second power unit 10, specifically, the second power unit 10 is a motor, and the motor is mounted on the bracket 11. Two liquid changing devices are driven to move by one motor. Avoiding the use of multiple motors and increasing control complexity.
By the liquid changing device of the embodiment, fresh culture medium gradually flows from the first cavity 306 of one cell culture device to the cell culture chamber of the second cavity 307, and old culture medium gradually flows from the second cavity 307 of the other cell culture device back to the first cavity 306, so that the metabolism process of the in-vivo environment is effectively simulated.
Example 2
The embodiment discloses a cell incubator, as shown in fig. 3 and 5, comprising an outer cylinder 301, an inner cylinder 302, a cylinder cover 303, a partition plate 304 and a slide clamping groove arranged on the partition plate 304 for clamping a cell climbing sheet 305; outer cylinder 301 is closed at one end and open at the other end; one end of the inner cylinder 302 is opened, the other end is sealed with the cylinder cover 303, and the diameter of the cylinder cover 303 is larger than that of the outer cylinder 301; the inner cylinder 302 is sleeved inside the outer cylinder 301, a first cavity 306 is formed in the inner cavity of the inner cylinder 302, a second cavity 307 is formed in the cavity between the inner cylinder 302 and the outer cylinder 301, and the axial length of the inner cylinder 302 is smaller than that of the outer cylinder 301, so that the inner cylinder 301 and the inner cylinder 302 are communicated; a plurality of partition plates 304 are arranged along the circumference of the outer wall of the inner cylinder 302, and the plurality of partition plates 304 divide the cavity between the outer cylinder 301 and the inner cylinder 302 into a plurality of independent cell culture cavities; the outer wall of the inner barrel 302 is physically free of gaps between the cell climbing sheet 305.
The cell culture apparatus in this embodiment is divided into a culture solution chamber for holding a culture solution and a cell culture chamber for culturing cells, and the culture solution chamber is provided with the culture solution; the cell culture chamber partition plate 304 is arranged in the cell culture device to isolate the cell culture environment into relatively independent micro spaces, so that the problems that the conventional gyrator has large volume and less cultured cells, and cell secretion substances are easily diluted and normal physiological effects cannot be exerted on co-cultured cells are solved; on the other hand, the separated relatively independent micro-spaces can minimize the problem that the culture genes in the gyrator have bubbles and are easy to generate fluid shearing force.
Example 3
As shown in fig. 1, the embodiment discloses a liquid-changing multicellular co-culture simulated weightlessness experimental device, which comprises a rotary simulated weightlessness unit 1 capable of rotating around a horizontal axis, a normal gravity unit 2 rotating around a vertical axis, a cell culture device 3, a liquid-changing device 4 and a first power unit 5 driving the rotary simulated weightlessness unit 1 and the normal gravity unit 2 to rotate; the rotation simulation weightlessness unit 1 generates a simulation weightlessness effect, the normal gravity unit 2 does not change the gravity condition of cells, and the first power unit 5 is a motor.
The cell culture device 3 is arranged in the rotary simulated weightlessness unit 1 and the normal gravity unit 2, and specifically, the cell culture device 3 can be installed in the rotary simulated weightlessness unit 1 and the normal gravity unit 2 in a pluggable manner. A first cavity 306 for storing a cell culture solution and a second cavity 307 for culturing cells are arranged in the cell culture device 3, and the first cavity 306 and the second cavity 307 are communicated; the second cavity 307 on the cell culture 3 in the swing simulated weightless unit 1 communicates with the second cavity 307 on the cell culture in the normal gravity unit 2.
The liquid exchange device 4 is arranged in the first cavity 306 of the cell culture device 3, and the liquid exchange device 4 can push the cell culture liquid in the first cavity 306 to move so as to drive the liquid in the cell culture device 3 in the rotary simulated weightless unit 1 to circulate with the liquid in the cell culture device 3 in the normal gravity unit 2. The medium can be controlled to circulate between the cell culture device on the rotary simulated weightless unit 1 and the cell culture device on the normal gravity unit 2 through the liquid exchange device 4. For example, the culture solution in the rotation simulated weightlessness unit 1 flows to the normal gravity unit 2, so that the cell factors secreted by the cells under simulated weightlessness flow to the cells cultured under normal gravity along with the culture solution, thereby observing the influence on the cell functions of the cells, and solving the problem that two different cells are difficult to co-culture under different gravities (normal gravity and simulated microgravity) in the microgravity molecular biology research;
Meanwhile, the liquid changing device 4 enables fresh culture medium to gradually flow into the cell culture chamber from the inner cylinder of one cell culture device, and old culture medium to gradually flow back into the inner cylinder from the cell culture chamber of the other cell culture device, so that the problem that in a rotation simulation weightlessness experiment, rotation simulation weightlessness is difficult to carry out for a long time due to nutrient substance consumption of the culture medium and accumulation of waste excreted by cells is solved.
In the present embodiment, the rotary simulated weightlessness unit 1 includes a first bevel gear 101 for driving the cell culture vessel to rotate and a first fixing frame 102 for supporting and fixing the cell culture vessel 3, wherein the first bevel gear 101 is a straight bevel gear, and the first fixing frame 102 is a circular frame. The axis of the first bevel gear 101 is along the horizontal direction, the first bevel gear 101 is connected with the first fixing frame 102, specifically, the first bevel gear 101 is connected with the first fixing frame 102 in a mode of selecting a clamping groove and a clamping buckle in the embodiment. Preferably, the rotary simulated weightless unit 1 is supported by a bracket 11, and the bearing 12 is sleeved outside the first fixing frame 102, and the bearing 12 is fixed on the bracket 11, so that the first fixing frame 102 can rotate on the bracket 11 around a horizontal shaft.
In this embodiment, the normal gravity unit 2 includes a second bevel gear 201 for driving the cell culture device 3 to rotate and a second fixing frame 202 for supporting and fixing the cell culture device 3, the axis of the second bevel gear 201 is along the vertical direction, the second bevel gear 201 is connected with the second fixing frame 202, and specifically, the cell culture device 3 and the second fixing frame 202 are also clamped by a clamping groove and a clamping buckle. In the present embodiment, the second mount 202 has the same shape as the first mount 102, and the first bevel gear 101 and the second bevel gear 201 are also the same. The normal gravity unit 2 is supported at another position of the bracket 11, and a bearing 12 is sleeved outside the second fixing frame, and the bearing 12 is fixed on the bracket 11, so that the second fixing frame 202 can rotate on the bracket 11 around a vertical shaft.
As a preferred scheme, the second cavity 307 in the rotary simulation weightless unit 1 is communicated with the second cavity 307 in the normal gravity unit 2 through a hose 8, and two ends of the hose 8 are respectively sleeved at the common ends of the Y-shaped liquid passing pipes 7 on the side of the rotary simulation weightless unit 1 and the side of the normal gravity unit 2, so that two ends of the hose 8 are respectively positioned on the rotation axes of the rotary simulation weightless unit 1 and the normal gravity unit 2, and therefore, in operation, the hose 8 only has rotary motion without displacement change.
In the embodiment, the rotation simulation weightlessness unit 1 and the normal gravity unit 2 can be driven by two motors to synchronously and reversely rotate respectively, but the following scheme is preferable:
A first transmission mechanism 6 is connected between the rotary simulation weightlessness unit 1 and the normal gravity unit 2, so that the rotary simulation weightlessness unit 1 and the normal gravity unit 2 rotate reversely at the same speed. Specifically, in this embodiment, as shown in fig. 2, the first transmission mechanism 6 includes a first transmission rod 601, a second transmission rod 602, and a third bevel gear 603, wherein the third bevel gear 603 is respectively disposed at two ends of the first transmission rod 601, the third bevel gear 603 is respectively disposed at two ends of the second transmission rod 602, the first transmission rod 601 is disposed along a horizontal direction, and the second transmission rod 602 is disposed along a vertical direction. The first transmission rod 601 and the second transmission rod 602 are meshed through a third bevel gear 603, and the third bevel gear 603 on the first transmission rod 601 is meshed with the rotary simulation weightless unit 1 through gears, specifically, the first bevel gear 101 is meshed with the third bevel gear 603 on the second transmission rod 602. The third bevel gear 603 on the first transmission rod 601 is meshed with the normal gravity unit 2 through gears, specifically the second bevel gear 201 is meshed with the third bevel gear 603 on the first transmission rod 601. The first power unit 5 is connected with a first bevel gear 101 of the swing analog weightless unit 1.
The first transmission rod 601 is provided with a support shaft sleeve 14, the support shaft sleeve 14 is connected with one end of a support rod 15, and the other end of the support rod 15 is fixed on a top plate 1103 of the bracket 11 or other members for supporting the device. Likewise, the second transmission rod 602 is also supported in the side plate 1102 of the bracket 11 by the support boss 14 and the support rod 15. The first power unit 5 is supported on the base 1101 by a support rod 15.
In the embodiment of the present invention, as shown in FIGS. 3 and 4, the cell culture apparatus 3 comprises an outer cylinder 301, an inner cylinder 302, a cylinder cover 303, a partition plate 304, and a slide clamping groove provided on the partition plate 304 for clamping a cell slide 305. Outer cylinder 301 is closed at one end and open at the other end; the cylinder cover 303 is annular as a whole, one end of the inner cylinder 302 is open, the other end is sealed with the inner ring of the cylinder cover 303, the diameter of the outer ring of the cylinder cover 303 is larger than that of the outer cylinder 301, the cylinder cover 303 can be detachably connected with the outer cylinder 301, specifically, threads are arranged on the inner wall of the outer ring of the cylinder cover 303, and threads are arranged on one end, connected with the cylinder cover 303, of the outer wall of the outer cylinder 301, so that the outer ring of the cylinder cover 303 is connected with the outer wall of the outer cylinder 301 through threads.
The inner cylinder 302 is sleeved inside the outer cylinder 301, the inner cavity of the inner cylinder 302 forms a first cavity 306, the cavity between the inner cylinder 302 and the outer cylinder 301 forms a second cavity 307, and the axial length of the inner cylinder 302 is smaller than that of the outer cylinder 301, so that a certain interval exists between the open end of the inner cylinder 302 and the closed end of the outer cylinder 301 after the inner cylinder 302 is sleeved inside the outer cylinder 301, and the interval ensures the communication between the first cavity 306 and the second cavity 307.
A plurality of separation plates 304 are arranged along the circumference of the outer wall of the inner cylinder 302, and the separation plates 304 divide the cavity between the outer cylinder 301 and the inner cylinder 302 into a plurality of relatively independent cell culture cavities, so that the problems that the conventional gyrator has large volume and less cultured cells, and cell secretion substances are easily diluted and cannot exert normal physiological effects are solved; on the other hand, the separated relatively independent micro-spaces can minimize the problem that the culture genes in the gyrator have bubbles and are easy to generate fluid shearing force. The second cavity 307 may house the cell climbing sheet 305, as shown in fig. 3, and there is no gap between the outer wall of the inner cylinder 302 and the cell climbing sheet 305, so that a cell culture cavity is formed between the cell climbing sheet 305 and the inner wall of the outer cylinder 301.
The cap 303 is provided with a liquid passage hole 308 communicating with the second cavity 307. Based on the structure of the liquid exchange device 4 of the invention, two liquid through holes 308 are symmetrically arranged on the cylinder cover 303, and the two liquid through holes 308 are connected with two symmetrical ends of the Y-shaped liquid through pipe 7, as shown in fig. 4. The common end of the Y-shaped liquid passing pipe 7 at the side of the rotary simulation weightlessness unit 1 is communicated with the common end of the Y-shaped liquid passing pipe 7 at the side of the normal gravity unit 2 through a hose 8. The connecting lines of the two liquid through holes 308 are distributed in a crisscross manner with the gear rod, so that the interference between the positions of the gear rod 402 and the liquid through holes 308 is avoided; meanwhile, as the second cavity 307 in the rotary simulation weightless unit 1 is communicated with the second cavity 307 in the normal gravity unit 2 through the hose 8, through the structural arrangement of the invention, the two ends of the hose 8 are respectively positioned on the rotation axes of the rotary simulation weightless unit 1 and the normal gravity unit 2, and the rotary simulation weightless unit 1 and the normal gravity unit 2 are guaranteed to rotate reversely at the same speed, so that the hose is prevented from winding, and the liquid passing between the two is prevented from being influenced.
In an embodiment, as shown in fig. 2 and 4, the liquid changing device 4 comprises a gear 401, a gear rod 402, a spring pull wire 403, a spring 404 and a piston 405; the gear lever 402 is supported on the cell culture vessel 3, specifically: both ends of the gear lever 402 are anchored to the cover 303 of the cell culture apparatus 3 in the above-described embodiment by means of anchor bosses 406. A piston 405 and a spring 404 are disposed in the first cavity 306, one end of the spring 404 is pressed against the piston 405, and the other end is fixed to the inner wall of the inner cylinder 302. One end of a spring stay wire 403 is wound on the gear rod 402, the other end of the spring stay wire passes through the spring 404 and is connected with the piston 405, the piston 405 can slide along the axial direction of the inner cylinder 302 without gaps, and the piston 405 presses the spring 404 when moving towards the gear rod 402; the gear rod 402 can wind or unwind the spring wire 403 when rotating, and the piston 405 is controlled to slide in the axial direction of the inner cylinder 302 with the aid of the elastic force of the spring 404. The gear 401 is connected with the gear rod 402, the gear 401 is driven by the second power unit 10 to rotate, and the gear rod 402 can rotate around the central shaft of the gear 401.
In this embodiment, the gear 401 of the rotation simulation weightless unit 1 and the gear 401 of the normal gravity unit 2 can be driven to rotate by two motors respectively, but the following scheme is preferable:
A second transmission mechanism 9 is arranged between the liquid exchange device 4 on the side of the rotation simulation weightlessness unit 1 and the liquid exchange device 4 on the side of the normal gravity unit 2, so that the two gears 401 are guaranteed to rotate at the same speed. In the present embodiment, the second transmission mechanism 9 includes a fourth bevel gear 901, a gear type bearing 902, a third transmission rod 903, a fourth transmission rod 904, and a fifth bevel gear 905.
The gear type bearing 902 is formed of a bearing, a tapered surface provided on the outer race of the bearing, straight teeth provided on the tapered surface, and straight teeth provided on the bottom surface of the outer race of the bearing, and the bearing herein is preferably a deep groove ball bearing. The gear type bearings 902 are sleeved outside the cell incubator 3, the inner diameter of the gear type bearings 902 is larger than the diameter of the outer cylinder 301, and the inner rings of the two gear type bearings 902 are respectively mounted on the side plate 1102 and the top plate 1103 through the fixing rods 906; and is coaxial with the center of the circle of the bearing 12 at the cell culture device at the side of the rotary simulated weightless unit 1 and the center of the circle of the bearing 12 at the cell culture device at the side of the normal gravity unit 2 respectively, and the inner ring of the gear type bearing 902 is in non-contact with the cell culture device 3, and the gear 401 can be meshed with the straight teeth on the bottom surface of the outer ring of the gear type bearing 902; the two ends of the third transmission rod 903 are respectively provided with a fifth bevel gear 905, and the fifth bevel gears 905 at the two ends of the third transmission rod 903 are respectively meshed with the fourth bevel gear 901 and straight teeth on the conical surface of the gear type bearing 902 at the side of the rotary simulation weightless unit 1; the fifth bevel gears 905 are respectively arranged at the two ends of the fourth transmission rod 904, and the fifth bevel gears 905 at the two ends of the fourth transmission rod 904 are respectively meshed with the fourth bevel gears 901 and straight teeth on the conical surfaces of the gear type bearings 902 at the side of the normal gravity unit 2. It should be noted that, since the whole liquid exchange device 4 rotates together with the cell culture apparatus 3, the rotation speed of the outer ring of the gear-type bearing 902 is set to be different from the rotation speed of the rotation-simulating weightless unit 1 in time or time, so that the gear 401 meshed with the rotation-simulating weightless unit can drive the spring 404 to pull the piston 405 to move. At this time, only one power system, i.e., the fourth bevel gear 901 is connected to the second power unit 10, needs to be provided. Specifically, the second power unit 10 is a motor, the motor is mounted on the bracket 11, and the fourth bevel gear 901 is connected to the motor. Avoiding the use of multiple motors and increasing control complexity.
Preferably, in this embodiment, as shown in fig. 4, a gear brake lever 407 is installed on the outer side of the top wall of the cylinder cover 303 near the gear 401, and the gear brake lever 407 can rotate around its own anchoring point through a sleeve structure, so that the free end of the gear brake lever 407 can be lapped over the tooth trace of the gear 401 to exert a braking effect. Specifically, in the experiment preparation stage, when the cell culture liquid is filled into the cell culture apparatus 3, the gear 401 can be braked by using the gear brake lever 407, so that the piston 405 is stably stopped at a certain set position of the inner cylinder 302; when the two cell incubators 3 are ready and connected, and are inserted into the swing simulation weightless unit 1 and the normal gravity unit 2, the gear 401 is engaged with the straight teeth on the outer ring bottom surface of the gear type bearing 902, and then the gear brake lever 407 can be removed.
The bracket 11 of the embodiment comprises a base 1101, a side plate 1102 and a top plate 1103, wherein a first mounting hole for mounting the normal gravity unit 2 is formed in the top plate 1103, and a second mounting hole for mounting the rotary simulation weightless unit 1 is formed in the side plate 1101.
As an alternative embodiment of the present invention, the test apparatus is further provided with a controller 13, and the controller 13 is capable of controlling the rotational speeds of the first power unit 5 and the second power unit 10, respectively, so that the rotation between the outer ring of the gear type bearing 902 on the side of the swing-simulation weightless unit 1 and the first bevel gear 101, and between the outer ring of the gear type bearing 902 on the side of the normal gravitational unit 2 and the second bevel gear 201 can be synchronized or differentially rotated. The rotation speed of the gear on the cell culture device can be precisely controlled by controlling the rotation speed difference between the first power unit 5 and the second power unit 10, and the cell culture medium can be automatically controlled to slowly flow between the rotation simulated weightlessness unit and the normal gravity unit at the liquid change speed or interval required by experiments; in the process of changing the liquid, the piston 405 which can be arranged as the liquid outflow side pushes the liquid to flow out, and the piston 405 of the liquid inflow side synchronously sucks the liquid to enter, so that the internal pressure of the liquid can not be changed.
It should be noted that, the present invention is not limited to the above embodiments, and based on the technical solutions disclosed in the present invention, those skilled in the art may make some substitutions and modifications to some technical features thereof without creative effort according to the disclosed technical contents, and these substitutions and modifications are all within the protection scope of the present invention.
Claims (2)
1. The liquid exchange device for the multicellular co-culture simulated weightlessness experiment is characterized by comprising a gear (401), a gear rod (402), a spring stay wire (403), a spring (404), a piston (405), a second transmission mechanism (9) for driving the pistons (405) in the two liquid exchange devices to synchronously move, and a second power unit (10) for providing power for the rotation of the second transmission mechanism (9) and the gear (401);
The gear (401) is connected with the gear rod (402); the piston (405) is arranged in the inner cavity of the cell culture device needing liquid exchange; one end of the spring (404) is extruded and propped against the piston (405), and the other end of the spring is fixed in the inner cavity of the cell culture device needing liquid exchange; one end of the spring stay wire (403) is wound on the gear rod (402), and the other end of the spring stay wire passes through the spring (404) to be connected with the piston (405);
The second transmission mechanism (9) comprises a fourth bevel gear (901), two gear bearings (902), a third transmission rod (903), a fourth transmission rod (904) and a fifth bevel gear (905);
The gear type bearing (902) is formed by a bearing, a conical surface arranged on the outer ring of the bearing, straight teeth on the conical surface and straight teeth on the bottom surface of the outer ring of the bearing; the gear (401) can be meshed with straight teeth on the bottom surface of the outer ring of the gear type bearing (902);
The two ends of the third transmission rod (903) are respectively provided with a fifth bevel gear (905), and the fifth bevel gears (905) at the two ends of the third transmission rod (903) are respectively meshed with the fourth bevel gear (901) and straight teeth on the conical surface of one gear type bearing (902);
The two ends of the fourth transmission rod (904) are respectively provided with a fifth bevel gear (905), and the fifth bevel gears (905) at the two ends of the fourth transmission rod (904) are respectively meshed with straight teeth on conical surfaces of the fourth bevel gear (901) and the other gear type bearing (902); the fourth bevel gear (901) is connected with the second power unit (10);
the gear rod (402) is anchored outside the cell culture device requiring liquid exchange through an anchoring shaft sleeve.
2. The liquid changing device for the multicellular co-culture simulated weightlessness experiment according to claim 1, further comprising a gear brake lever (407) for braking the gear (401), wherein one end of the gear brake lever (407) is anchored by a shaft sleeve structure, and the other end rotates around an anchor point.
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| DE19631997C2 (en) * | 1996-08-08 | 2001-04-19 | Dornier Gmbh | Device for micro-gravitational processing of cell cultures |
| EP1820846A1 (en) * | 2001-04-25 | 2007-08-22 | Cornell Research Foundation, Inc. | Cell culture system |
| US20090328242A1 (en) * | 2006-11-28 | 2009-12-31 | Kennedy John W | Replication of Undifferentiated Cells in a Weightless Environment, Uses Thereof and a Facility for Such Replication and the Acceleration of the Evolution of Plants and Animals |
| CN102485878B (en) * | 2010-12-01 | 2013-05-15 | 中国人民解放军第四军医大学 | Multi-cell joint culture device under simulated weightlessness |
| CN102181364B (en) * | 2011-03-11 | 2013-01-30 | 北京航空航天大学 | A uniaxial rotary online shear in vitro cell culture device |
| CN203878154U (en) * | 2014-05-21 | 2014-10-15 | 中国人民解放军第四军医大学 | Three-dimensional-gyration replaceable culture fluid cell microgravity device |
| CN104031835B (en) * | 2014-05-21 | 2015-11-25 | 中国人民解放军第四军医大学 | The replaceable nutrient solution cell micro-gravity system of three-dimensional revolution |
| CN105112294A (en) * | 2015-09-15 | 2015-12-02 | 重庆大学 | Coaxial multi-incubator bioreactor |
| CN205741061U (en) * | 2016-04-25 | 2016-11-30 | 高香红 | A kind of Tissue Culture Dish of replaceable culture fluid |
| CN108384719B (en) * | 2018-04-26 | 2023-11-17 | 中国烟草总公司郑州烟草研究院 | cell co-culture device |
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