CN107670116B - 一种抗真菌角膜修复材料的制备方法 - Google Patents
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Abstract
本发明公开了一种抗真菌角膜修复材料的制备方法,包括以下步骤:(1)配置β‑环糊精二醛饱和溶液,加入药物充分反应后,得到β‑环糊精二醛/药物包合物;(2)提取的Ι型胶原冻干,用乙酸或盐酸溶液溶解配制成胶原溶液;(3)将步骤(1)所得的包合物作为交联剂以加入到胶原溶液中反应,除去溶液中的气泡;(4)将交联后的胶原溶液浇铸到角膜修复材料成型模具中成膜。该方法制备的材料具有透明度高,机械性能好,在不同温度下释放效果存在明显差异,温敏释放性质,可用于不同医疗领域。
Description
技术领域
本发明涉及材料领域,特别涉及一种抗真菌角膜修复材料的制备方法。
背景技术
角膜是透明的组织,它位于眼球的最外层,容易受到感染及外伤。角膜疾病(如角膜白斑、圆锥角膜、角膜溃疡或者外伤等)使角膜由透明变浑浊而影响患者视力。角膜移植手术是治疗角膜类疾病的有效方式之一,其中异体移植效果是最好的一种手术,是目前治疗角膜溃疡、角膜混浊等疾病的首选治疗方法。受异体角膜供体的限制,目前角膜修复材料成为了研究热点。
在世界范围内,尤其在发展中国家感染性角膜炎是仅次于白内障的主要致盲性眼病。在感染性角膜病中,病毒性角膜炎最常见,但我国作为一个以农业人口占绝大多数的发展中国家,生产机械化程度较低,角膜植物外伤多,同时由于抗生素、激素以及免疫抑制剂的应用,真菌性角膜炎的发病率已上升到感染性角膜病的首位(占51%~70%)。临床上真菌性角膜炎早期应首先采取药物治疗,药物不能治愈的真菌性角膜炎可行角膜移植手术治疗,但目前角膜材料缺乏,远不能满足临床治疗所需,故真菌性角膜炎预后不令人满意。因此发明一种新的抗真菌角膜修复材料是十分重要的。
发明内容
本发明的目的在于公开一种抗真菌角膜修复材料的制备方法。
本发明所采取的技术方案是:一种抗真菌角膜修复材料的制备方法,包括以下步骤:
(1)配置β-环糊精二醛饱和溶液,加入药物充分反应后,得到β-环糊精二醛/药物包合物;
(2)将Ι型胶原冻干,用乙酸或盐酸溶液溶解配制成胶原溶液;
(3)将步骤(1)所得的包合物作为交联剂以加入到胶原溶液中反应,除去溶液中的气泡;
(4)将交联后的胶原溶液浇铸到角膜修复材料成型模具中成膜。
优选的,步骤(1)中β-环糊精二醛饱和溶液的温度是30℃~60℃。
优选的,步骤(1)中加入的药物是伏立康唑。
优选的,β-环糊精二醛与伏立康唑的用量为摩尔比1:1~1:0.5。
优选的,步骤(1)中充分反应的时间为30~120min。
优选的,步骤(2)中胶原溶液的浓度为4~8mg/ml。
优选的,步骤(3)中交联剂质量占胶原的质量比为5%~30%。
优选的,步骤(3)中交联反应的时间为2~6小时。
本发明的有益效果是:该方法制备的材料具有透明度高,机械性能好,在不同温度下释放效果存在明显差异,温敏释放性质,可用于不同医疗领域。
附图说明
图1是实施例1的包合药物的胶原膜的扫面电子显微镜(SEM)放大2000倍的截面图。
图2是实施例1的包合药物的胶原膜的干态外观图。
图3是实施例1的包合药物的胶原膜的湿态外观图。
图4是实施1的包合物交联胶原膜透光率。
图5是实施例1的包合药物的胶原膜的力学强度。
图6是实施例1的包合药物交联胶原膜的释药曲线。
具体实施方式
为了更好的理解本发明,下面结合实施例对本发明做进一步地说明,但本发明要求保护的范围并不局限于此。
实施例1
以冷冻干燥法制备的β-环糊精二醛/伏立康唑包合物作为交联剂对胶原进行交联,制备一种包合抗真菌药物的胶原膜材料。这种胶原膜材料制备步骤如下:
(1)将β-环糊精二醛加入去离子水中在60℃温度下搅拌配成饱和溶液,搅拌加入伏立康唑(摩尔比1:1),恒温充分反应2小时后冻干、丙酮溶解、抽滤、干燥,得到β-环糊精二醛/伏立康唑包合物(β-CD-DA/Vor);
(2)将从牛跟腱中提取的Ι型胶原冻干,用乙酸或盐酸溶解配制成浓度为4~8mg/mL的胶原溶液;
(3)将步骤(1)所得的包合物作为交联剂加入到胶原溶液中,交联剂的用量占胶原质量的15%,4℃低温下搅拌发生交联反应,4小时后室温下搅拌除去溶液中的气泡;
(4)将交联后的胶原溶液浇铸到角膜修复材料成型模具中,在室温条件下自然晾干成膜或在超净台中风干成膜;
(5)将步骤(4)所得的交联膜材料取出,用去离子水冲洗3次,然后在室温条件下自然风干,用眼科角膜环钻裁成6~10mm、边缘整齐的膜片,即得到抗真菌角膜修复材料。
实施例2
以饱和水溶液法制备的β-环糊精二醛/伏立康唑包合物作为交联剂对胶原进行交联,制备一种包合抗真菌药物的胶原膜材料。这种胶原膜材料的制备步骤如下:
(1)将β-环糊精二醛加入去离子水中在30℃温度下配成饱和溶液,搅拌加入伏立康唑(摩尔比1:1),恒温充分反应1小时后静置、滤去上清液、抽滤、干燥,得到β-CD-DA/Vor包合物;
(2)将从牛跟腱中提取的Ι型胶原冻干,用乙酸或盐酸溶解配制成浓度为8mg/mL的胶原溶液;
(3)将步骤(1)所得的包合物作为交联剂加入到胶原溶液中,交联剂的用量占胶原质量的5%,4℃低温搅拌发生交联反应,4小时后室温下搅拌除去溶液中的气泡;
(4)将交联后的胶原溶液浇铸到角膜修复材料成型模具中,在室温条件下自然晾干成膜或在超净台中风干成膜;
(5)将步骤(4)所得的交联膜材料取出,用去离子水冲洗2次,然后在室温条件下自然风干,用眼科角膜环钻裁成6~10mm、边缘整齐的膜片,即得到抗真菌角膜修复材料。
实施例3
以超声波法制备的β-环糊精二醛/伏立康唑包合物作为交联剂对胶原进行交联,制备一种包合抗真菌药物的胶原膜材料。这种胶原膜材料的制备步骤如下:
(1)将β-环糊精二醛加入去离子水中常温超声配成饱和溶液,超声加入伏立康唑(摩尔比1:0.5),恒温充分反应60min后静置、滤去上清液、抽滤、干燥,得到β-CD-DA/Vor包合物;
(2)将从牛跟腱中提取的Ι型胶原冻干,用乙酸或盐酸溶解配制成浓度为4mg/mL的胶原溶液;
(3)将步骤(1)所得的包合物作为交联剂加入到胶原溶液中,交联剂的用量占胶原质量的30%,4℃低温搅拌发生交联反应,4小时后室温下搅拌除去溶液中的气泡;
(4)将交联后的胶原溶液浇铸到角膜修复材料成型模具中,在室温条件下自然晾干成膜或在超净台中风干成膜;
(5)将步骤(4)所得的交联膜材料取出,用去离子水冲洗3次,然后在室温条件下自然风干,用眼科角膜环钻裁成6~10mm、边缘整齐的膜片,即得到抗真菌角膜修复材料。
将实施例1制备的包合药物的胶原膜做了体外释放实验,步骤如下:
将本品裁成直径为10mm的膜片置于试管,加入3.0mL磷酸盐缓冲液(PBS,pH 7.4),分别在4℃和37℃恒温摇床中进行释药,每种药膜的释放分别做三组平行样。固定时间取全部释放液,并加入等量PBS,以累计释放率为纵坐标,时间为横坐标绘制释放曲线(图6所示)。
通过对实施例1中的材料进行理化性能表征,图1显示该抗真菌角膜修复材料表面平整光滑且具有与天然角膜相似的层状结构;图2、图3和图4显示该抗真菌角膜修复材料具有优良的光学性能;图5表明该抗真菌角膜修复材料具有较好的力学性能;图6表明了该抗真菌角膜修复材料在不同温度下释放效果存在明显差异,说明该材料具有温敏释放性质,可用于不同医疗领域。
Claims (8)
1.一种抗真菌角膜修复材料的制备方法,其特征在于,包括以下步骤:
(1)配置β-环糊精二醛饱和溶液,加入药物充分反应后,得到β-环糊精二醛/药物包合物;
(2)将Ι型胶原冻干,用乙酸或盐酸溶液溶解配制成胶原溶液;
(3)将步骤(1)所得的包合物作为交联剂加入胶原溶液中反应,除去溶液中的气泡;
(4)将反应后的胶原溶液浇铸到角膜修复材料成型模具中成膜。
2.根据权利要求1所述的制备方法,其特征在于,步骤(1)中β-环糊精二醛饱和溶液的温度是30℃~60℃。
3.根据权利要求1所述的制备方法,其特征在于,步骤(1)中加入的药物是伏立康唑。
4.根据权利要求3所述的制备方法,其特征在于,β-环糊精二醛与伏立康唑的用量为摩尔比1:1~1:0.5。
5.根据权利要求1所述的制备方法,其特征在于,步骤(1)中充分反应的时间为30~120min。
6.根据权利要求1所述的制备方法,其特征在于,步骤(2)中胶原溶液的浓度为4~8mg/mL 。
7.根据权利要求1所述的制备方法,其特征在于,步骤(3)中交联剂质量占胶原的质量比为5%~30%。
8.根据权利要求1所述的制备方法,其特征在于,步骤(3)中反应的时间为2~6小时。
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