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WO1999043308A2 - Treating pulmonary hypertension through tenascin suppression and elastase inhibition - Google Patents

Treating pulmonary hypertension through tenascin suppression and elastase inhibition Download PDF

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Publication number
WO1999043308A2
WO1999043308A2 PCT/IB1999/000413 IB9900413W WO9943308A2 WO 1999043308 A2 WO1999043308 A2 WO 1999043308A2 IB 9900413 W IB9900413 W IB 9900413W WO 9943308 A2 WO9943308 A2 WO 9943308A2
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WO
WIPO (PCT)
Prior art keywords
pulmonary hypertension
elastase
tenascin
inhibitor
treating pulmonary
Prior art date
Application number
PCT/IB1999/000413
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French (fr)
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WO1999043308A3 (en
Inventor
Marlene Rabinovitch
Original Assignee
Marlene Rabinovitch
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Filing date
Publication date
Application filed by Marlene Rabinovitch filed Critical Marlene Rabinovitch
Publication of WO1999043308A2 publication Critical patent/WO1999043308A2/en
Publication of WO1999043308A3 publication Critical patent/WO1999043308A3/en

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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K38/00Medicinal preparations containing peptides
    • A61K38/16Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
    • A61K38/55Protease inhibitors
    • A61K38/57Protease inhibitors from animals; from humans
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00Medicinal preparations containing organic active ingredients
    • A61K31/185Acids; Anhydrides, halides or salts thereof, e.g. sulfur acids, imidic, hydrazonic or hydroximic acids
    • A61K31/19Carboxylic acids, e.g. valproic acid
    • A61K31/195Carboxylic acids, e.g. valproic acid having an amino group
    • A61K31/197Carboxylic acids, e.g. valproic acid having an amino group the amino and the carboxyl groups being attached to the same acyclic carbon chain, e.g. gamma-aminobutyric acid [GABA], beta-alanine, epsilon-aminocaproic acid or pantothenic acid
    • A61K31/198Alpha-amino acids, e.g. alanine or edetic acid [EDTA]

Definitions

  • a variety of therapies have been introduced to try to prevent progression of the pulmonary vascular lesions associated with pulmonary hypertension.
  • vasodilators such as calcium channel blockers, prostacyclin, and, potentially, nitric oxide therapy, and using anticoagulants to prevent thromboses.
  • Recent reports have shown that even in the absences of beneficial acute hemodynamic response, long term prostacyclin has proven effective in a subset of patients for improving symptoms and cardiac output, particularly with exercise. In rare cases, hemodynamic studies show a reduction from systemic to virtually normal levels of pulmonary artery pressure. No patient has, however, been successfully weaned from this therapy and severe rebound effects have been demonstrated upon attempt at withdrawal of prostacyclin.
  • the oral and inhaled prostacyclin analogs may provide as or more effective therapies than intravenous prostacyclin and will certainly be more convenient.
  • lung transplant appears the only option, and this carries high mortality and morbidity rates in terms of immunosuppressive therapy.
  • a strategy aimed both at preventing and inducing structural regression of the vascular disease associated with pulmonary hypertension is needed.
  • the present invention is based upon the discovery that pulmonary hypertension can be treated based upon the suppression of tenascin.
  • Tenascin can be suppressed directly, such as by antisense therapy, or indirectly, by inhibiting serine elastases such as endogenous vascular elastase, a novel enzyme which has been found to increase tenascin levels, or by inhibiting matrix metalloproteinases which may be activated serine elastases.
  • the present invention relates to a method and composition for treating pulmonary hypertension comprising administering to a subject in need thereof, preferably a human being, an inhibitor of elastase, preferably endogenous vascular elastase.
  • the inhibitor is a serine elastase inhibitor, such as elafin.
  • Another preferred inhibitor is L-arginine.
  • pulmonary hypertension is understood to refer to both primary and secondary pulmonary hypertension.
  • kits for accomplishing such treatment comprising (i) an effective amount of an inhibitor of elastase, preferably endogenous vascular elastase, (ii) one or more pharmaceutically acceptable carriers and/or additives, and (iii) instructions for use in treating pulmonary hypertension.
  • instructions for use shall mean any FDA- mandated labelling, instructions, or package inserts that relate to the administration of endogenous vascular elastase inhibitors for the purpose of treating pulmonary hypertension.
  • instructions for use may include, but are not limited to, indications for pulmonary hypertension, identification of specific symptoms of pulmonary hypertension that can be ameliorated by the claimed treatment, and recommended dosage amounts for subjects suffering from pulmonary hypertension.
  • the amount of endogenous vascular elastase inhibitor, which is required in a medication or diagnostic aid according to the invention to achieve the desired effect will depend on a number of factors, in particular the specific application, the nature of the particular compound used, the mode of administration, and the condition of the patient.
  • a daily dose per patient for the treatment of pulmonary hypertension is in the range 25 ⁇ g to 250 mg; typically from 0.5 ⁇ g to 2.5 mg, preferably from 7 ⁇ g to 285 ⁇ g, per day per kilogram body weight.
  • an intravenous dose in the range 0.5 ⁇ g to 1.5 mg per kilogram body weight per day may conveniently be administered as an infusion of from 0.5 ng to 1.0 ⁇ g per kilogram body weight per minute.
  • Infusion fluids suitable for this purpose contain, for example, from 10 ng to 10 ⁇ g per milliliter.
  • Ampoules for injection contain, for example, from 0.1 ⁇ g to 1.0 mg and orally administrable unit dose formulations, such as tablets or capsules, contain, for example, from 0.1 to 100 mg, typically from 1 to 50 mg.
  • a single unit dose formulation may be administered.
  • the endogenous vascular elastase inhibitors are typically admixed with, inter alia, an acceptable carrier.
  • the carrier must, of course, be acceptable in the sense of being compatible with any other ingredients in the formulation and must not be deleterious to the patient.
  • the carrier may be a solid or a liquid, or both, and is preferably formulated with the inhibitor as a unit-dose formulation, for example, a tablet, which may contain from 0.05% to 95% by weight of the active inhibitor.
  • One or more inhibitors may be incorporated in the formulations of the invention, which may be prepared by any of the well known techniques of pharmacy for admixing the components.
  • pharmacologically active substances may be present in the formulations of the present invention which are known to be useful for treating pulmonary hypertension.
  • the inhibitors of the invention may be present in combination with prostacyclin.
  • compositions of the invention include those suitable for oral, inhalation (in solid and liquid forms), rectal, topical, buccal (e.g. sub-lingual), parenteral (e.g. subcutaneous, intramuscular, intradermal, or intravenous) and transdermal administration, although the most suitable route in any given case will depend on the nature and severity of the condition being treated and on the nature of the particular form of inhibitor which is being used.
  • Formulations suitable for oral administration may be presented in discrete units, such as capsules, cachets, lozenges, or tablets, each containing a predetermined amount of inhibitor; as a powder or granules; as a solution or a suspension in an aqueous or non-aqueous liquid; or as an oil-in- water or water-in-oil emulsion.
  • Such formulations may be prepared by any suitable method of pharmacy which includes the step of bringing into association the active compound and a suitable carrier (which may contain one or more accessory ingredients).
  • the formulations of the invention are prepared by uniformly and intimately admixing the active compound with a liquid or finely divided solid carrier, or both, and then, if necessary, shaping the resulting mixture.
  • a tablet may be prepared by compressing or molding a powder or granules containing the active compound, optionally with one or more accessory ingredients.
  • Compressed tablets may be prepared by compressing, in a suitable machine, the compound in a free-flowing form, such as a powder or granules optionally mixed with a binder, lubricant, inert diluent, and/or surface active/dispersing agent(s). Molded tablets may be made by molding, in a suitable machine, the powdered compound moistened with an inert liquid binder.
  • Formulations suitable for buccal (sub-lingual) administration include lozenges comprising the active compound(s), in a flavored base, usually sucrose and acacia or tragacanth; and pastilles comprising the active compound(s) in an inert base such as gelatin and glycerin or sucrose and acacia.
  • Formulations of the present invention suitable for parenteral administration conveniently comprise sterile aqueous preparations of endogenous vascular elastase inhibitors, which preparations are preferably isotonic with the blood of the intended recipient. These preparations are preferably administered intravenously, although administration may also be effected by means of subcutaneous, intramuscular, or intradermal injection. Such preparations may conveniently be prepared by admixing the compound with water or a glycine buffer and rendering the resulting solution sterile and isotonic with the blood. Injectable formulations according to the invention generally contain from 0.1 to 5 % w/v of active compound and are administered at a rate of 0.1 ml/min/kg.
  • Formulations suitable for rectal administration are preferably presented as unit dose suppositories. These may be prepared by admixing the active compound(s) with one or more conventional solid carriers, for example, cocoa butter, and then shaping the resulting mixture.
  • Formulations suitable for topical application to the skin preferably take the form of an ointment, cream, lotion, paste, gel, spray, aerosol, or oil. Carriers which may be used include vaseline, lanoline, polyethylene glycols, alcohols, and combinations of two or more thereof.
  • the active compound is generally present at a concentration of from 0.1 to 15% w/w, for example, from 0.5 to 2% w/w.
  • Formulations for transdermal administration may be delivered by iontophoresis (see, for example, Pharmaceutical Research 3(6), 318, (1986)) and typically take the form of an optionally buffered aqueous solution of the active compound(s).
  • Suitable formulations comprise citrate or bis/tris buffer (pH 6) or ethanol/ water and contain from 0.1 to 0.2 M active ingredient(s).
  • the invention is further illustrated by the following, non-limiting examples.
  • Increased elastase activity has been demonstrated to play a pivotal role in the pathobiology of pulmonary hypertension in rats with monocrotaline-induced pulmonary vascular disease, as well as in experimental coronary artery neointimal formation where there appears to be a cooperative interaction with cytokines, especially inter leukin IB, in inducing the vascular disease.
  • increased expression of the matrix glycoprotein tenascin is evident in obstructive pulmonary arteries with extensive neointimal formation as assessed in lung biopsy and in monocrotaline induced pulmonary vascular disease.
  • EVE endogenous vascular elastase
  • one or more serum factors which appear to include apolipoprotein Al can stimulate elastase activity by an integrin- mediated event which results in phosphorylation of focal adhesion kinase (FAK) and extracellular related kinase (ERK1/2) which transactivates AML-1 , a putative elastase transcription factor.
  • FGF focal adhesion kinase
  • ERK1/2 extracellular related kinase transcription factor
  • the matrix glycoprotein tenascin which can be induced by FGF-2 directly or through the elastase-driven upregulation of matrix metalloproteinases.
  • the tenascin serves to alter the smooth muscle cell cytoskeleton and, by clustering the avB3 integrin receptors, also clusters the receptors for growth factors, such as epidermal growth factor (EGF) which rapidly phosphorylate upon addition of the ligand, culminating in a nuclear signal.
  • EGF epidermal growth factor
  • Hypertrophied pulmonary arteries when placed in floating collagen gels, show regression of the medial thickening to normal values when they are treated with elastase or matrix metalloproteinase inhibitors or tenascin antisense agents. There is a progressive reduction in medial width when the hypertrophied pulmonary arteries are placed in released collagen gels and a progressive increase when placed in restrained collagen gels. This regression appears to be associated with reduced tenascin expression and apoptosis.

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  • General Health & Medical Sciences (AREA)
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  • Pharmacology & Pharmacy (AREA)
  • Proteomics, Peptides & Aminoacids (AREA)
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Abstract

A method for treating pulmonary hypertension is described comprising administering an elastase inhibitor to a patient. Inhibition of elastase suppresses tenascin, which leads to a reduction of the smooth muscle cell proliferation associated with pulmonary hypertension. More specifically, the tenascin suppressant is L-arginine and the elastase inhibitor is elafin.

Description

TREATING PULMONARY HYPERTENSION THROUGH TENASCIN SUPPRESSION AND ELASTASE INHIBITION
BACKGROUND OF THE INVENTION
A variety of therapies have been introduced to try to prevent progression of the pulmonary vascular lesions associated with pulmonary hypertension. Lowering pulmonary artery pressure with vasodilators, such as calcium channel blockers, prostacyclin, and, potentially, nitric oxide therapy, and using anticoagulants to prevent thromboses, are current strategies in use. Recent reports have shown that even in the absences of beneficial acute hemodynamic response, long term prostacyclin has proven effective in a subset of patients for improving symptoms and cardiac output, particularly with exercise. In rare cases, hemodynamic studies show a reduction from systemic to virtually normal levels of pulmonary artery pressure. No patient has, however, been successfully weaned from this therapy and severe rebound effects have been demonstrated upon attempt at withdrawal of prostacyclin. The oral and inhaled prostacyclin analogs may provide as or more effective therapies than intravenous prostacyclin and will certainly be more convenient. In cases where regression has not been achieved, lung transplant appears the only option, and this carries high mortality and morbidity rates in terms of immunosuppressive therapy. Thus, a strategy aimed both at preventing and inducing structural regression of the vascular disease associated with pulmonary hypertension is needed.
SUMMARY OF THE INVENTION
The present invention is based upon the discovery that pulmonary hypertension can be treated based upon the suppression of tenascin. Tenascin can be suppressed directly, such as by antisense therapy, or indirectly, by inhibiting serine elastases such as endogenous vascular elastase, a novel enzyme which has been found to increase tenascin levels, or by inhibiting matrix metalloproteinases which may be activated serine elastases.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS In one embodiment, the present invention relates to a method and composition for treating pulmonary hypertension comprising administering to a subject in need thereof, preferably a human being, an inhibitor of elastase, preferably endogenous vascular elastase. Preferably, the inhibitor is a serine elastase inhibitor, such as elafin. Another preferred inhibitor is L-arginine. The term pulmonary hypertension is understood to refer to both primary and secondary pulmonary hypertension.
The present invention also relates to kits for accomplishing such treatment comprising (i) an effective amount of an inhibitor of elastase, preferably endogenous vascular elastase, (ii) one or more pharmaceutically acceptable carriers and/or additives, and (iii) instructions for use in treating pulmonary hypertension.
As used herein, the phrase "instructions for use" shall mean any FDA- mandated labelling, instructions, or package inserts that relate to the administration of endogenous vascular elastase inhibitors for the purpose of treating pulmonary hypertension. For example, instructions for use may include, but are not limited to, indications for pulmonary hypertension, identification of specific symptoms of pulmonary hypertension that can be ameliorated by the claimed treatment, and recommended dosage amounts for subjects suffering from pulmonary hypertension. The amount of endogenous vascular elastase inhibitor, which is required in a medication or diagnostic aid according to the invention to achieve the desired effect will depend on a number of factors, in particular the specific application, the nature of the particular compound used, the mode of administration, and the condition of the patient. In general, a daily dose per patient for the treatment of pulmonary hypertension is in the range 25 μg to 250 mg; typically from 0.5 μg to 2.5 mg, preferably from 7 μg to 285 μg, per day per kilogram body weight. For example, an intravenous dose in the range 0.5 μg to 1.5 mg per kilogram body weight per day may conveniently be administered as an infusion of from 0.5 ng to 1.0 μg per kilogram body weight per minute. Infusion fluids suitable for this purpose contain, for example, from 10 ng to 10 μg per milliliter. Ampoules for injection contain, for example, from 0.1 μg to 1.0 mg and orally administrable unit dose formulations, such as tablets or capsules, contain, for example, from 0.1 to 100 mg, typically from 1 to 50 mg. For diagnostic purposes, a single unit dose formulation may be administered. In the manufacture of a pharmaceutical composition or kit according to the invention, hereinafter referred to as a "formulation", the endogenous vascular elastase inhibitors are typically admixed with, inter alia, an acceptable carrier. The carrier must, of course, be acceptable in the sense of being compatible with any other ingredients in the formulation and must not be deleterious to the patient. The carrier may be a solid or a liquid, or both, and is preferably formulated with the inhibitor as a unit-dose formulation, for example, a tablet, which may contain from 0.05% to 95% by weight of the active inhibitor. One or more inhibitors may be incorporated in the formulations of the invention, which may be prepared by any of the well known techniques of pharmacy for admixing the components.
In addition to an inhibitor of endogenous vascular elastase, other pharmacologically active substances may be present in the formulations of the present invention which are known to be useful for treating pulmonary hypertension. For example, the inhibitors of the invention may be present in combination with prostacyclin.
The formulations of the invention include those suitable for oral, inhalation (in solid and liquid forms), rectal, topical, buccal (e.g. sub-lingual), parenteral (e.g. subcutaneous, intramuscular, intradermal, or intravenous) and transdermal administration, although the most suitable route in any given case will depend on the nature and severity of the condition being treated and on the nature of the particular form of inhibitor which is being used.
Formulations suitable for oral administration may be presented in discrete units, such as capsules, cachets, lozenges, or tablets, each containing a predetermined amount of inhibitor; as a powder or granules; as a solution or a suspension in an aqueous or non-aqueous liquid; or as an oil-in- water or water-in-oil emulsion. Such formulations may be prepared by any suitable method of pharmacy which includes the step of bringing into association the active compound and a suitable carrier (which may contain one or more accessory ingredients).
In general, the formulations of the invention are prepared by uniformly and intimately admixing the active compound with a liquid or finely divided solid carrier, or both, and then, if necessary, shaping the resulting mixture. For example, a tablet may be prepared by compressing or molding a powder or granules containing the active compound, optionally with one or more accessory ingredients. Compressed tablets may be prepared by compressing, in a suitable machine, the compound in a free-flowing form, such as a powder or granules optionally mixed with a binder, lubricant, inert diluent, and/or surface active/dispersing agent(s). Molded tablets may be made by molding, in a suitable machine, the powdered compound moistened with an inert liquid binder.
Formulations suitable for buccal (sub-lingual) administration include lozenges comprising the active compound(s), in a flavored base, usually sucrose and acacia or tragacanth; and pastilles comprising the active compound(s) in an inert base such as gelatin and glycerin or sucrose and acacia.
Formulations of the present invention suitable for parenteral administration conveniently comprise sterile aqueous preparations of endogenous vascular elastase inhibitors, which preparations are preferably isotonic with the blood of the intended recipient. These preparations are preferably administered intravenously, although administration may also be effected by means of subcutaneous, intramuscular, or intradermal injection. Such preparations may conveniently be prepared by admixing the compound with water or a glycine buffer and rendering the resulting solution sterile and isotonic with the blood. Injectable formulations according to the invention generally contain from 0.1 to 5 % w/v of active compound and are administered at a rate of 0.1 ml/min/kg.
Formulations suitable for rectal administration are preferably presented as unit dose suppositories. These may be prepared by admixing the active compound(s) with one or more conventional solid carriers, for example, cocoa butter, and then shaping the resulting mixture. Formulations suitable for topical application to the skin preferably take the form of an ointment, cream, lotion, paste, gel, spray, aerosol, or oil. Carriers which may be used include vaseline, lanoline, polyethylene glycols, alcohols, and combinations of two or more thereof. The active compound is generally present at a concentration of from 0.1 to 15% w/w, for example, from 0.5 to 2% w/w. Formulations for transdermal administration may be delivered by iontophoresis (see, for example, Pharmaceutical Research 3(6), 318, (1986)) and typically take the form of an optionally buffered aqueous solution of the active compound(s). Suitable formulations comprise citrate or bis/tris buffer (pH 6) or ethanol/ water and contain from 0.1 to 0.2 M active ingredient(s). The invention is further illustrated by the following, non-limiting examples.
Increased elastase activity has been demonstrated to play a pivotal role in the pathobiology of pulmonary hypertension in rats with monocrotaline-induced pulmonary vascular disease, as well as in experimental coronary artery neointimal formation where there appears to be a cooperative interaction with cytokines, especially inter leukin IB, in inducing the vascular disease. In addition, increased expression of the matrix glycoprotein tenascin is evident in obstructive pulmonary arteries with extensive neointimal formation as assessed in lung biopsy and in monocrotaline induced pulmonary vascular disease. An early increase in elastase activity has been shown with the development of the vascular lesions in monocrotaline (Mc)-treated rats and a later increase with progressive disease. A cause and effect relationship is demonstrated in studies in which elastase inhibitors have been used prior to the Mc-induced endothelial injury to prevent the structural changes and associated pulmonary hypertension or, when they have been administered later in the course of the disease to retard its progression.
Subsequent studies related the endogenous vascular elastase (EVE) in the pulmonary arteries of rats with pulmonary hypertension from other etiologies, e.g. , hypoxia. Here, an early increase in elastase activity is followed by the development of pulmonary hypertension (PH) but a later increase in elastase does not occur. This model differs from the Mc-induced PH in that it is not progressive and, in fact, will regress upon removal of the rats from the hypoxic environment. Subsequent studies showed that EVE is produced by the smooth muscle cells of the vessel wall and that it appears to be structurally related to the serine proteinase, adipsin.
This mechanism of elastase induction is further supported by in vitro studies. Common to all clinical and experimental PH producing stimuli or etiologies is evidence of endothelial perturbation and injury. It is believed that the structural and functional endothelial alterations result in loss of the endothelial barrier function and that, as a result, serum or endothelial factors 'leak' into the subendothelium and stimulate elastase activity in smooth muscle cells. Studies have, in fact, shown that one or more serum factors which appear to include apolipoprotein Al can stimulate elastase activity by an integrin- mediated event which results in phosphorylation of focal adhesion kinase (FAK) and extracellular related kinase (ERK1/2) which transactivates AML-1 , a putative elastase transcription factor. It has also been shown that the endogenous vascular elastase (EVE) releases potent growth factors, such as fibroblast growth factor (FGF)-2, from an inactive form bound to proteoglycans in the extracellular matrix to a biologically active form which promotes smooth muscle cell proliferation.
This effect is enhanced through the concomitant expression of the matrix glycoprotein tenascin which can be induced by FGF-2 directly or through the elastase-driven upregulation of matrix metalloproteinases. The tenascin serves to alter the smooth muscle cell cytoskeleton and, by clustering the avB3 integrin receptors, also clusters the receptors for growth factors, such as epidermal growth factor (EGF) which rapidly phosphorylate upon addition of the ligand, culminating in a nuclear signal. Cell culture studies have shown that tenascin promotes FGF-2 dependent and is a prerequisite for EGF-dependent SMC proliferation. It has also been shown that the degradation products of elastin, elastin peptides, cooperatively interact with cytokines such as interleukin 1 B in inducing SMC fibronectin production, the latter being a promoter of SMC migration. It has also been shown that, when SMC are stress-unloaded by floating them in collagen gels, matrix metalloproteinases are downregulated, as is tenascin, and the cells undergo apoptosis or programmed cell death. Tenascin is critical to this process, since its supplementation in the gels will rescue cells. Hypertrophied pulmonary arteries, when placed in floating collagen gels, show regression of the medial thickening to normal values when they are treated with elastase or matrix metalloproteinase inhibitors or tenascin antisense agents. There is a progressive reduction in medial width when the hypertrophied pulmonary arteries are placed in released collagen gels and a progressive increase when placed in restrained collagen gels. This regression appears to be associated with reduced tenascin expression and apoptosis.
In vivo induction of pulmonary hypertension with serine elastase inhibitors in experimental rats.
Pulmonary artery pressure was monitored in groups of rats (n=6) at 21 and 28 days after injection with monocrotaline. Rats were given either the orally bioavailible serine elastase inhibitor Ik or related compound M249314 (both from Zeneca) twice daily by gavage between 21 and 28 days. Control groups of rats were given vehicle between 21 and 28 days instead of inhibitor. As shown in Figure 1 (in vivo administration of serine elastase inhibitors reverse progressive increases in pulmonary artery pressure following monocrotaline injection into the rat), orally bioavailible highly selective serine elastase inhibitors produce a significant reduction in the levels of pulmonary artery pressure when comparing values in the control and untreated rats. This clearly shows that the orally bioavailible inhibitors given for 7 days are highly effective in inducing regression of pulmonary hypertension.
While the invention has been described in detail and with reference to specific embodiments thereof, it will be apparent to one skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention.

Claims

WHAT IS CLAIMED IS:
1. A method for treating pulmonary hypertension comprising administering to a subject in need thereof an effective amount of an inhibitor of elastase.
2. The method as claimed in claim 1 wherein the subject is a human being.
3. The method as claimed in claim 1 wherein the inhibitor is a serine elastase inhibitor.
4. The method as claimed in claim 1 wherein the inhibitor is elafin.
5. The method as claimed in claim 1 wherein the inhibitor is L-arginine.
6. The method as claimed in claim 1 wherein the subject suffers from primary pulmonary hypertension.
7. The method as claimed in claim 1 wherein the subject suffers from secondary pulmonary hypertension.
8. A method for treating pulmonary hypertension comprising administering to a subject in need thereof an effective amount of an agent to suppress tenascin.
9. The method as claimed in claim 8 wherein the subject is a human being.
10. The method as claimed in claim 8 wherein the agent to suppress tenascin is a serine elastase inhibitor.
11. The method as claimed in claim 10 wherein the inhibitor is elafin.
12. The method as claimed in claim 8 wherein the agent to suppress tenascin is L-arginine.
13. The method as claimed in claim 8 wherein the subject suffers from primary pulmonary hypertension.
14. The method as claimed in claim 8 wherein the subject suffers from secondary pulmonary hypertension.
15. A kit for treating pulmonary hypertension comprising (i) an effective amount of an inhibitor of elastase, (ii) one or more pharmaceutically acceptable carriers and/or additives, and (iii) instructions for use in treating pulmonary hypertension.
16. A kit for treating pulmonary hypertension comprising (i) an effective amount of an agent to suppress tenascin, (ii) one or more pharmaceutically acceptable carriers and/or additives, and (iii) instructions for use in treating pulmonary hypertension.
PCT/IB1999/000413 1998-02-27 1999-02-26 Treating pulmonary hypertension through tenascin suppression and elastase inhibition WO1999043308A2 (en)

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Cited By (6)

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WO2004073623A2 (en) 2003-02-14 2004-09-02 Children's Hospital & Research Center At Oakland Treatment of conditions associated with decreased nitric oxide bioavailability, including elevated arginase conditions
US6849605B1 (en) 1999-03-05 2005-02-01 The Trustees Of University Technology Corporation Inhibitors of serine protease activity, methods and compositions for treatment of viral infections
FR2930036A1 (en) * 2008-04-11 2009-10-16 Assist Publ Hopitaux De Paris METHOD FOR DIAGNOSING PULMONARY ARTERIAL HYPERTENSION
US7648840B2 (en) 2004-12-01 2010-01-19 Children's Hospital & Research Center At Oakland Diagnosis of conditions associated with decreased arginine bioavailability
US7704958B1 (en) 1999-03-05 2010-04-27 Bio Holding, Inc. Methods and compositions for inhibiting apoptosis using serine protease inhibitors
WO2016030323A1 (en) * 2014-08-26 2016-03-03 Proteo Biotech Ag Use of elafin for disorders associated with elastase independent increase in troponin

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WO1995009636A1 (en) * 1993-10-04 1995-04-13 The Trustees Of Columbia University In The City Ofnew York Method of inducing vasorelaxation to treat pulmonary hypertension
US5895788A (en) * 1996-01-31 1999-04-20 The Board Of Trustees Of The University Of Arkansas Use of L-arginine and salts thereof in drinking water for the prevention and/or treatment of pulmonary hypertension syndrome in avians
WO1998008500A1 (en) * 1996-08-26 1998-03-05 Board Of Regents, The University Of Texas System Hypertonic arginine compositions and methods
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