WO2014090152A1 - 神经生长因子在制备用于治疗中老年男性性功能低下综合征的药物中的用途 - Google Patents

神经生长因子在制备用于治疗中老年男性性功能低下综合征的药物中的用途 Download PDF

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WO2014090152A1
WO2014090152A1 PCT/CN2013/089052 CN2013089052W WO2014090152A1 WO 2014090152 A1 WO2014090152 A1 WO 2014090152A1 CN 2013089052 W CN2013089052 W CN 2013089052W WO 2014090152 A1 WO2014090152 A1 WO 2014090152A1
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growth factor
nerve growth
testosterone
group
medicament
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PCT/CN2013/089052
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French (fr)
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黄亚东
苏志坚
葛仁山
项琪
张齐好
肖飞
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广州暨南大学医药生物技术研究开发中心
暨南大学
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Priority to JP2015525731A priority Critical patent/JP6026659B2/ja
Publication of WO2014090152A1 publication Critical patent/WO2014090152A1/zh

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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
    • A61K38/17Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
    • A61K38/18Growth factors; Growth regulators
    • A61K38/185Nerve growth factor [NGF]; Brain derived neurotrophic factor [BDNF]; Ciliary neurotrophic factor [CNTF]; Glial derived neurotrophic factor [GDNF]; Neurotrophins, e.g. NT-3
    • 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
    • A61K38/17Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
    • A61K38/18Growth factors; Growth regulators
    • A61K38/1858Platelet-derived growth factor [PDGF]
    • 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
    • A61K38/17Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
    • A61K38/22Hormones
    • A61K38/24Follicle-stimulating hormone [FSH]; Chorionic gonadotropins, e.g. HCG; Luteinising hormone [LH]; Thyroid-stimulating hormone [TSH]
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P15/00Drugs for genital or sexual disorders; Contraceptives
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P15/00Drugs for genital or sexual disorders; Contraceptives
    • A61P15/08Drugs for genital or sexual disorders; Contraceptives for gonadal disorders or for enhancing fertility, e.g. inducers of ovulation or of spermatogenesis
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P15/00Drugs for genital or sexual disorders; Contraceptives
    • A61P15/10Drugs for genital or sexual disorders; Contraceptives for impotence

Definitions

  • nerve growth factor in the preparation of a medicament for treating sexual dysfunction in middle-aged and elderly men
  • the invention belongs to the field of biomedical technology and relates to the second medical use of nerve growth factor.
  • the present invention relates to the use of human nerve cell growth factor for the preparation of a medicament for the treatment of sexual dysfunction in a middle-aged male.
  • Human, rat and mouse-derived nerve cell growth factors can be administered by nasal administration or testicular intravenous injection to treat late-onset hypogonadism syndrome in human middle-aged men. Background technique
  • Late onset hypogonadism in males is an age-related testicular dysfunction in middle-aged and elderly men. Its main features include loss of libido and erection quality (especially night erection). Emotional changes accompanied by decreased mental and spatial orientation, decreased lean body mass (LBM) with decreased muscle mass and muscle strength, decreased body hair and skin, decreased bone density, and increased visceral fat (Wang Xiaokun, et al., China) Journal of Andrology, 2012, 18 (5): 475 - 477; Guo Yinglu and Li Hongjun, Chinese Journal of Andrology, 2004, 10 (8): 563 - 566).
  • LBM lean body mass
  • Delayed hypogonadism syndrome usually occurs between 45 and 55 years old, as early as 40 years old or delayed to 65 years, and the cause of the disease and hypofunction of the hypothalamic-pituitary-testicular axis and testicular stromal cell decline Related (Wang et al, J. Androl., 2009, 32 (1): 1 - 10; Chen et al, Endocrindogy, 2002, 143 (5): 1637 - 1642).
  • Leydig cell is a cell that synthesizes and secretes testosterone and is the most important source of androgen in males.
  • Testosterone in human serum is produced by the stimulation of Luteinizing hormone (LH) secreted by the pituitary gland and regulated by a series of negative feedback mechanisms.
  • LH Luteinizing hormone
  • Clinical studies have shown that male hypothalamic-pituitary axis function gradually decreases with age, which leads to a weakening of the release of luteinizing hormone, which ultimately affects the synthesis and secretion of androgen in Leydig cells (Chen Weixiang et al., Inner Mongolia) Medicine, 2012, 31 (5): 117 - 118.).
  • Leydig cells are divided into four during differentiation and development.
  • Stem leydig cell SLC
  • Progenitor leydig cell PLC
  • Immature leydig cell Immature leydig cell
  • Adult leydig ALC
  • SLC Stem leydig cell
  • PLC Progenitor leydig cell
  • Immature leydig cell Immature leydig cell
  • ALC adult stromal cells
  • testosterone supplementation therapy is mainly through testosterone supplementation therapy.
  • this therapy has significant safety problems.
  • long-term quantitative supplementation of testosterone may cause acne and erythrocytosis in patients;
  • Patients are prone to adverse reactions such as water, sodium retention and abnormal penile erection, dysuria, and even liver and kidney function damage and prostate cancer (Shi Hongli, Chinese Journal of Clinical Health, 2009,12 (4): 386-388; Fan Xiaobo Et al, Chinese Journal of Andrology, 2010, 16 (1): 68-71).
  • Nerve growth factor is one of the most important bioactive molecules in mammals, distributed in the brain, submandibular gland, heart, iris, skin and testis.
  • nerve growth factor promotes neuronal development, axonal growth, neurotransmitter synthesis, and inhibition of neuronal apoptosis.
  • nerve growth factor is mainly involved in regulating the immune system. Function, inhibition of mitosis of part of tumor cells and promotion of wound healing, etc. (Tuszynski et al, 2005, Nature Medicine 11: 551-555).
  • the natural nerve growth factor is composed of three subunits of ⁇ , ⁇ , and ⁇ , and its main active site is the ⁇ subunit.
  • NGF binds to the nerve growth factor receptor (NGFR) and is internalized by the NGF-mediated endocytosis mechanism to form a pericardial vesicle. The tube is retrogradely transported to the cell body.
  • NGFR nerve growth factor receptor
  • transduction of a second messenger system such as tyrosine protein kinase, calcium acyl lactitol, endogenous cyclic adenosine, etc., initiates a series of cascade reactions to exert its biological effects (Ribatti et al, Int. J) Exp. Pathol.
  • mouse-derived nerve growth factor has been developed as a neuroprotective drug for human injection.
  • the drug brands include Enjingfu (Xiamen Beidazhilu Bioengineering Co., Ltd.) and Jin briefly Haite Biopharmaceutical Co., Ltd.) And Su Peptide (Beijing Shutai Shen Pharmaceutical Co., Ltd.).
  • Rat-derived nerve growth factor and obtained by genetic engineering Human nerve growth factor has also been shown to have the same biological function (Lou et al., 2012, Neuroscience, 223: 225-237).
  • nerve growth factor and nerve growth factor receptors are also widely present in testicular tissues.
  • nerve growth factor can act onspermatogenic Cell, Sertoli Cell and Leydig cells (LC) by autocrine or paracrine, promote sperm formation and maturation, testosterone Synthesis and secretion and development of testicular tissue (Hao Yujuan and Zhang Ying, Foreign Animal Science, 2011, 31 (2): 89-90).
  • the predecessors have also used cobra venom nerve growth factor to treat male reproductive defects and reduce the effect of gossypol on male spermatogenesis (ZL 00116192.X), but whether nerve growth factor can be used to treat delayed hypogonadism syndrome Not yet reported. Summary of the invention
  • the main object of the present invention is to provide a use of a nerve growth factor for the preparation of a medicament for the treatment of male and female gonad hypofunction syndrome.
  • a combination of nerve growth factor or other related therapeutic agent can be administered to a patient by nasal administration or testicular intravenous injection to promote the pituitary to increase luteinizing hormone secretion and induce testicular interstitial The proliferation and differentiation of stem cells, thereby increasing the testosterone content in the testis and serum, ultimately improving or curing the sexual dysfunction syndrome in middle-aged men.
  • nerve growth factor Since nerve growth factor has become a commercial drug, its composition, structure and properties are known, and the preparation of different pharmaceutical dosage forms is also a routine knowledge in the art. Therefore, under the premise that the new use of nerve growth factor can be confirmed, Different pharmaceutical dosage forms prepared from nerve growth factors and corresponding vectors can also be readily accomplished by those skilled in the art.
  • the nerve growth factor used in the present invention may include, but is not limited to, human nerve growth factor, mouse nerve growth factor, and rat nerve growth factor.
  • the nerve growth factor used in the present invention is its ⁇ subunit amino acid sequence, and more preferably, the amino acid sequence of the nerve growth factor is as shown in SEQ ID Nos: 1-3.
  • the nerve growth factor used in the present invention can be extracted from the corresponding animal body or tissue (mainly mouse nerve growth factor and rat nerve growth factor), or appropriately expressed by genetic engineering methods. Expression in the host yields the corresponding recombinant nerve growth factor.
  • the present inventors have found in the study that the effects of the nerve growth factor as the main active ingredient in treating middle-aged and elderly male patients with hypogonadism syndrome are as follows:
  • mice Male aging mice ( Senescence-accelerated mouse prone-8, SAM P8,
  • mice 32 weeks old, 26 ⁇ 2 g/only), and the homologous normal mice (Sensify-accelerated resistant mouse prone-1, SAM Rl, 32 weeks tooth order, 26 ⁇ 2 g / only) were used as normal controls. group.
  • the mouse nerve growth factor was diluted to 0.9 mg/ml (m g /mL) with 0.9% physiological saline, and then administered by nasal drip according to 250 ⁇ g/kg body weight g/kg, once every 2 days. Continuous administration for 5 weeks.
  • the model group was treated with the male rapid aging It (Shenescence-accelerated mouse prone-8, SAM P8, 32-week tooth, 26 ⁇ 2 g / only), and the same as the normal control group, with 0.9% saline
  • the amount of the nose, the amount of the solution, and the administration time were the same as those of the experimental group.
  • serum and testes were collected.
  • the content of testosterone in serum and testis was detected by radioimmunoassay.
  • the expression of several rate-limiting enzymes in testosterone synthesis and secretion was detected by fluorescence quantitative strand polymerase method and protein hybridization method.
  • the serum testosterone in the NGF-treated group had an average testosterone content of 18.09 ng/ml (n g /ml), which was 12.3 times that of the normal group, but only with saline as a comfort.
  • the testosterone content in the serum was only 5.1% of the normal control group.
  • the testosterone content in the testis of the mouse nerve growth factor treatment group was comparable to that of the normal control group, and there was no significant difference between the two, but they were 2.5 times higher than the model group. The results of this experiment show that nerve growth factor can significantly improve the testosterone content in serum and testis of rapidly aging rats.
  • the mouse nerve growth factor that enters the brain by intranasal administration can act on The hypothalamus and pituitary gland, thereby improving and increasing the testosterone secretion of testosterone.
  • Further studies on the molecular mechanism showed that the expression of Steroidogenic acute regulatory protein (Star) in the mouse Lemocyte-derived stromal cells was significantly increased compared with the saline-treated model group. More than this, this result indicates that mice in the mouse nerve growth factor-treated group have increased luteinizing hormone in the blood and regulate the synthesis of testosterone by Leydig cells.
  • the drug promotes proliferation and differentiation of rapidly aging mouse testicular mesenchymal stem cells
  • Leydig cells are divided into four distinct phases during differentiation and development: interstitial dry Stem leydig cell (SLC), Progenitor leydig cell (PLC), Immature leydig cell (ILC) and adult stromal cells (ALOo) during these developments
  • SLC interstitial dry Stem leydig cell
  • PLC Progenitor leydig cell
  • Immature leydig cell Immature leydig cell
  • ALOo adult stromal cells
  • mRNA messenger ribonucleic acid
  • Ethane dimethane sulfonate (90 mg/kg body weight, mg/kg)
  • the testes were removed, and the seminiferous tubules were isolated in DMEM/F-12 medium (containing 0.1% calf). Serum albumin), incubated at 34 ° C for 16 hours.
  • the seminiferous tubules were divided into 24-well plates and treated with different concentrations of rat nerve growth factor and luteinizing hormone for 24 hours.
  • the staining of the nuclei with fluorescent stains, laser confocal microscopy and fluorescence microscopy showed that the use of luteinizing hormone (LH) alone did not "activate" SLC, while rat nerve growth factor promoted significant proliferation of SLC. Differentiation began, and the proliferation effect was concentration-dependent with rat nerve growth factor (Fig. 4).
  • SLC is distributed on the surface of seminiferous tubules, and nerve growth factor and nerve growth factor receptor are also widely present in testicular tissue. Therefore, drugs containing rat nerve growth factor can induce SLC proliferation and differentiation through testicular vein injection. .
  • mouse, rat and human-derived nerve growth factor can be used alone or in combination with other related agents to form a pharmaceutical composition for the treatment of middle-aged male hypogonadism syndrome, wherein the drug combination Forms, including nose drops, injections or needle powders.
  • the pharmaceutical composition may contain other related active ingredients, and may also contain a stabilizer, a salt which changes the osmotic pressure, a buffer, or an antioxidant.
  • the present invention provides a method of treating delayed hypogonadism syndrome in a middle-aged male, the method comprising: administering rat nerve growth factor, mouse nerve growth factor or Genetic engineering method to obtain human nerve growth factor, administered to a subject by intranasal administration at a dose of 40 ⁇ g/kg body weight (g/kg) (mainly middle-aged and elderly patients with delayed onset hypogonadism syndrome) Male), once every other day, a total of 10 times as a course of treatment, test the blood testosterone content after the end of each course, according to the testosterone content in the blood to determine whether the next course of treatment is needed, until the testosterone in the blood The content reaches a normal level; alternatively, rat nerve growth factor, mouse nerve growth factor or genetically engineered human nerve growth factor can be obtained at a dose of 1-3 ⁇ g/kg body weight g/kg) through the testicular vein.
  • Figure 2 Rat nerve growth factor-induced proliferation of testicular mesenchymal stem cells
  • FIG. 3 Quantitative analysis of key enzyme gene expression on the testosterone synthesis pathway.
  • the treatment time was 72 hours, and then the medium containing the above various cytokines was replaced with the insulin-transferrin-sodium selenite medium additive (ITS) + luteinizing hormone (LH)-based medium to continue culture.
  • ITS insulin-transferrin-sodium selenite medium additive
  • RNA ribonucleic acid
  • the reverse transcription kit purchased from Invitrogen, Cat. No. 11753500
  • ⁇ RNA fluorescence chain polymerase chain reaction
  • ITS Insulin-transferrin-sodium selenite medium additive
  • Figure 4 Radioimmunoassay analysis of testosterone content in culture medium, human nerve growth factor concentration of 200 ng / ml (ng / ml), 100 ng / ml (ng / ml), 10 ng / ml (ng / Ml), platelet-derived growth factor AA (PDGFAA) at a concentration of 10 ng/ml (ng/ml), luteinizing hormone (LH) concentration of 280 ng/ml (ng/ml), and treatment time of 72 hours Then, the medium containing the various cytokines described above is replaced with the insulin-transferrin-sodium selenite medium additive (ITS) + luteinizing hormone (LH) medium, and the culture is continued until the 21st day. Change the medium every 3.5 days and collect the training on the 14th and 21st days. Nutrient supernatant, radioimmunoassay kit (purchased from Beijing North Institute of Biotechnology, article number:
  • B10TFB detects supernatant testosterone.
  • FIG. 5 Analysis of serum testosterone levels in fast-aging rats.
  • Normal mice are homologous SAM R1 series.
  • Model group mice are SAMP8 mice (purchased from Tianjin University of Traditional Chinese Medicine, certificate number: W-J Jinshi Momentum M Word No. 006, 26 ⁇ 2 g/only), mice in the nerve growth factor group were administered at a dose of 250 ⁇ g/kg body weight (g/kg), administered intranasally every other day for 5 weeks, eyeballs Blood was taken, serum was collected, and testosterone was detected by radioimmunoassay. *** ⁇ 0.001 ⁇ 3 ⁇ 4 Normal
  • Figure 7 Quantitative PCR analysis of key enzyme genes for synthesis and secretion of testosterone in rapidly aging mouse testicular interstitial cells.
  • the mouse nerve growth factor group was administered at a dose of 250 ⁇ g/kg body weight g/kg, nasally every other day.
  • Administration continuous administration for 5 weeks, testicular sample extraction of ribonucleic acid (RNA), reverse transcription kit (purchased from Invitrogen, Cat. No.: 11753500) reverse transcription of 1 ⁇ g ( ⁇ ribonucleic acid (RNA), 42 ° C reversal After 30 minutes, the reaction was terminated by treatment at 85 ° C for 5 minutes.
  • RNA ribonucleic acid
  • reverse transcription kit purchased from Invitrogen, Cat. No.: 11753500
  • RPS16 40S ribosomal protein S16 gene (RPS16, whose primer sequence was synthesized by Huada Gene Research Institute) was used as an internal reference, and the testosterone synthesis was detected by fluorescence quantitative strand polymerase reaction (PCR).
  • PCR fluorescence quantitative strand polymerase reaction
  • Figure 8 Expression analysis of the testosterone transporter gene in the fast-aging mouse fine tube, the mouse nerve growth factor group is administered at a dose of 250 ⁇ g/kg body weight g/kg, administered nasally every other day. After 5 weeks of continuous administration, the test sample was extracted with ribonucleic acid (RNA), and the reverse transcription kit reversed 1 ⁇ g of g) ribonucleic acid (RNA). After reverse transcription for 30 minutes at 42 ° C, the reaction was terminated by treatment at 85 ° C for 5 minutes.
  • RNA ribonucleic acid
  • RNA reverse transcription kit reversed 1 ⁇ g of g) ribonucleic acid
  • Example 1 Detection of proliferative effect of rat nerve growth factor on rat Leydig cells
  • Luteinizing Hormone purchased from Sigma-Aldrich Shanghai Trading Co., Ltd., Item No.: L9773
  • Ethyl dimethyl sulfone Ethyl dimethyl sulfone
  • RNA extraction kit (purchased from Bio-Rad, USA, article number: 170-8890, 170-8880), total RNA extraction kit (purchased from QIAGEN, Germany, article number: 74104).
  • cytokines ie, platelet-derived growth factor AA or nerve growth factor
  • ITS insulin-transferrin-sub Sodium selenate medium additive
  • ITS insulin-transferrin-sodium selenite medium additive
  • PDGF AA platelet-derived growth factor AA
  • ITS insulin-transferrin-selenate Sodium Media Additive
  • ITS insulin-transferrin-sodium selenite medium additive
  • rat nerve growth factor concentration was 200 ng/ ML (n g /ml), 100 ng / ml (n g / ml), 10 ng / ml
  • PDGF AA platelet-derived growth factor AA
  • Example 2 Detection of rat nerve growth factor-induced differentiation of rat Leydig cells: Male SPRAGUE-DAWLEY rats (purchased from Guangdong Medical Animal Experimental Center, 12 weeks old, 250 ⁇ 20 g/only) 7 days intraperitoneal injection of acetaminophen thiosulfone (EDS, 90 mg / kg body weight), after the carbon dioxide was sacrificed, the testicles were taken out, placed in ice-cold phosphate buffer, the capsule was removed, and the blood vessels and the seminiferous tubules were peeled off.
  • EDS acetaminophen thiosulfone
  • the concentration of rat nerve growth factor was 200 ng/ml (n g /ml), 100 ng/ml (n g /ml), 10 ng/ml (n g /ml), platelet-derived growth factor AA (PDGF AA) at a concentration of 10 ng/ml (ng/ml) and luteinizing hormone (LH) concentration of 280 ns Gram/ml (n g /ml), the treatment time is 72 hours, and then the medium containing the above various cytokines is replaced with insulin-transferrin-sodium selenite medium additive (ITS) + luteinizing The culture medium of hormone (LH) was continued until the 21st day, the medium was changed every 3.5 days, the test medium of the test medium was collected on the 14th day and the 21st day, and the samples were collected on the 14th and 21st days.
  • ITS insulin-transferrin-sodium selenite medium additive
  • Reverse transcription kit purchased from Invitrogen, Cat. No.: 11753500 Reverse transcription of 1 ⁇ g ( ⁇ ribonucleic acid (RNA), reverse transcription at 42 ° C for 30 minutes, 85 ° C treatment for 5 minutes to terminate the reaction, 40S ribosomal protein S16 gene (40S ribosomal protein S16 gene (RPS16, whose primer sequence is synthesized by Huada gene)
  • 40S ribosomal protein S16 gene 40S ribosomal protein S16 gene (RPS16, whose primer sequence is synthesized by Huada gene)
  • RPS16 ribosomal protein S16 gene
  • real-time PCR was used to detect the expression of related enzymes on the testosterone synthesis pathway (Fig. 2).
  • Steroidogenic acute regulatory protein (STAR) gene rat nerve growth factor 100 ng/ml (ng/ The ml) group significantly promoted the steroid hormone synthesis of acute regulatory protein (StAR), hydroxy- ⁇ -5-steroid dehydrogenase, 3 beta-and hydroxy-delta-5-steroid dehydrogenase, 3 beta- and steroid delta-isomerase 1, hsd3bl ) Up-regulated expression of three genes, hydroxysteroid (17-beta) dehydrogenase 3, hsd 17b3, which is significantly better than stimulating Luteinizing hormone (LH) treatment group; and rat nerve growth factor 200 ng/ml (ng/ml) group promoted 17 ⁇ -hydroxysteroid dehydrogenase 3 (Hsdl7b3) and 5 ⁇ -reduction
  • the expression of the steroid-5-alpha-reductase (Srd5al) gene is up-regulated without
  • NGF 10 ng / ml (ng / ml) group did not significantly promote the expression of several genes.
  • the rat nerve growth factor 200 ng/ml (ng/ml) group, the rat nerve growth factor 100 ng/ml (ng/ml) group and the nerve growth factor 10 ng/ml group were significantly promoted.
  • Steroids synthesis acute regulatory protein StAR
  • hydroxy- ⁇ -5-steroid dehydrogenase 3 beta-and sterol ⁇ -isomerase 1
  • hsd 17b3 17 ⁇ -hydroxysteroid dehydrogenase 3
  • the up-regulated expression of the genes, the rat nerve growth factor 200 ng / ml (ng / ml) group was significantly better than luteinizing hormone
  • the rat nerve growth factor 100 ng/ml (ng/ml) group and the nerve growth factor 10 ng/ml (ng/ml) group were less potent than the luteinizing hormone (LH) group.
  • Example 4 Therapeutic effect of nerve growth factor on rapidly aging mice
  • mice Male SAM P8 and SAM R1 mice (purchased from the Animal Center of the First affiliated Hospital of Tianjin University of Traditional Chinese Medicine, 8 months old, weighing 26 ⁇ 2 g) 12: 5 in the model group and 5 in the mouse nerve growth factor group, normal Group 5; nasal administration every other day, continuous administration for 5 weeks, nerve growth factor group dose of 250 ⁇ g / kg body weight g / kg); eyeball blood collection, collection of testes, radioimmunoassay to detect testosterone in vivo; fluorescence Quantitative face polymerase reaction and protein hybridization methods were used to detect the expression of several enzymes at different levels. Radioimmunoassay showed that nerve growth factor significantly restored the testosterone content in the serum and testis of the model group.
  • the level of testosterone recovery was comparable to that of the normal group ( Figure 5-6); the results of real-time PCR showed that the testosterone synthesis pathway steroid hormone synthesis acute regulatory protein (StAR), cholesterol side chain lyase (cytochrome P450, family 11, Subfamily a, polypeptide 1, Cypllal ), hydroxy- ⁇ -5-steroid dehydrogenase, 3 ⁇ and steroid ⁇ -isomerase 1 (hsd3bl), 17 ⁇ -hydroxysteroid dehydrogenase 3 (Hsdl7b3), 5 ⁇ -reductase 1
  • Srd5al the expression of the cholesterol side chain cleavage enzyme (Cypllal) gene in the mouse nerve growth factor-treated group showed significant up-regulation (Fig.

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Abstract

本发明提供了神经生长因子在制备用于治疗中老年男性性腺功能低下综合征的药物中的用途,主要是用于制备治疗因垂体分泌促黄体生成激素降低或睾丸间质细胞衰老而导致的人体睾酮含量下降的药物,其中所述神经生长因子来源于人、小鼠或大鼠,优选来源于人。所述神经生长因子的氨基酸序列如SEQ ID No:1-3所示。

Description

神经生长因子在制备用于治疗中老年男性性功能低下综合征的药物中的 用途
技术领域
本发明属于生物医药技术领域, 涉及神经生长因子的第二医学用途。 具体而言, 本发明涉及人神经细胞生长因子在制备用于治疗中老年男性性 功能低下综合征的药物中的用途。可以通过鼻腔给药或睾丸静脉注射的途 径施用人、大鼠和小鼠来源的神经细胞生长因子来治疗人类中老年男性迟 发性性腺功能低下综合征。 背景技术
人类迟发性性腺功能低下综合征 (late onset hypogonadism in males, LOH)为中老年男性多发的一种与老龄相关的睾丸机能减退, 其主要特征 包括性欲和勃起质量(特别是夜间勃起)减退、 情绪改变伴有脑力和空间 定向能力下降、 瘦体量 (Lean body mass, LBM) 减少伴肌肉容积和肌力 下降、 体毛减少和皮肤改变、 骨密度下降以及内脏脂肪增加等 (王玺坤, 等, 中华男科学杂志, 2012, 18 ( 5): 475 - 477; 郭应禄和李宏军, 中华 男科学杂志, 2004, 10 ( 8): 563 - 566)。 迟发性性腺功能低下综合征一 般好发于 45 - 55岁,也可以早至 40岁或延迟到 65岁,而发病原因与下丘 脑 -垂体 -睾丸轴系的功能减退和睾丸间质细胞衰退有关 (Wang 等, J. Androl. , 2009, 32 ( 1 ): 1 - 10; Chen等, Endocrindogy, 2002, 143 ( 5): 1637 - 1642)。
睾丸间质细胞 (leydig cell, LC) 是一种具有合成和分泌睾酮功能的 细胞, 是雄性体内雄激素的最主要来源。 人体血清中的睾酮是间质细胞受 脑垂体分泌的促黄体生成激素 (Luteinizing hormone, LH) 剌激而产生的, 并受一系列负反馈机制调节。临床研究表明,男性下丘脑-垂体轴功能随着 年龄增长而逐渐下降, 从而导致促黄体生成激素脉冲释放的幅度减弱, 最 终影响睾丸间质细胞合成和分泌雄性激素 (陈为想等, 内蒙古中医药, 2012,31 ( 5): 117 - 118. )。 此外, 睾丸间质细胞在分化发育过程中分为四 个显著不同的阶段: 间质干细胞 (Stem leydig cell, SLC)、 间质祖细胞 (Progenitor leydig cell, PLC)、幼稚型间质细胞(Immature leydig cell, ILC) 和成年型间质细胞 (Adult leydig cell, ALC)。 而这些发育过程中由于增殖 分化异常、 数量减少及激素合成分泌功能减退也会导致体内雄激素缺乏 (Ge等, Biol. Reprod. , 2005, 72 (6): 1405 - 1415; 5. Ge 等, Proc. Natl. Acad. Sci. USA, 2006, 103: 2719 - 2724)。
现时, 临床上治疗中老年迟发性性腺功能低下综合征主要通过睾酮补 充疗法, 然而, 该疗法除了需要定期注射睾酮以外, 还存在显著的安全性 问题。 首先, 长期定量补充睾酮会使患者易生痤疮并患红细胞增多症; 其 次, 容易造成血清睾酮浓度的大幅度波动, 进而引起患者情绪和迟发性性 腺功能低下综合征症状的明显起伏; 再次, 患者容易出现水、 钠潴留及阴 茎异常勃起、 排尿困难等不良反应, 甚至肝肾功能受损及引发前列腺癌等 疾病 (史虹莉, 中国临床保健杂志, 2009,12 (4): 386 - 388; 范晓博 等, 中华男科学杂志, 2010, 16 ( 1 ): 68 - 71 )。
神经生长因子(nerve growth factor, NGF)是哺乳动物中最重要的生物 活性分子之一, 分布在大脑、颌下腺、 心脏、 虹膜、皮肤及睾丸等组织中。 对于神经系统, 神经生长因子具有促进神经元发育、 轴突生长、 递质合成 及抑制神经细胞凋亡等功能; 而对于心血管、 免疫、 生殖等其它系统, 神 经生长因子主要表现在调节免疫系统功能、抑制部分肿瘤细胞的有丝分裂 以及促进创口愈合等(Tuszynski等, 2005, Nature Medicine 11 : 551 - 555)。
天然的神经生长因子由 α、 β、 γ三个亚单位组成, 其主要活性位点为 β 亚单位。 在神经系统中, 神经生长因子与受体 (nerve growth factor receptor, NGFR)结合后,通过神经生长因子受体介导的内吞机制内在化, 形成轴膜包绕小泡, 经轴突沿微管逆行转运至胞体。 最后, 经酪氨酸蛋白 激酶、 脂酰肌醇钙、 内源性环腺苷酸等第二信使体系的转导, 启动一系列 级联反应而发挥其生物学效应 (Ribatti等, Int. J. Exp. Pathol. , 2009, 90 (6): 615 - 620)。 目前, 小鼠来源的神经生长因子已经被开发为人注射 用神经保护类药物, 药物品牌包括恩经复(厦门北大之路生物工程有限公 司)、 金路捷 (武汉海特生物制药股份有限公司) 和苏肽生 (北京舒泰神 药业有限公司)。 而大鼠来源的神经生长因子及通过基因工程方式获得的 人神经生长因子亦已证明具有相同的生物学功能 (Lou et al., 2012, Neuroscience, 223: 225-237)。
除了在神经系统分布较多以外, 神经生长因子和神经生长因子受体也 广泛存在于睾丸组织中。 近年来研究证实, 神经生长因子可以通过自分泌 或者旁分泌的方式作用于生精细胞(Spermatogenic Cell),支持细胞(Sertoli Cell) 和睾丸间质细胞 (LC) , 促进精子的形成和成熟、 睾酮的合成和分 泌以及睾丸组织的发育(郝玉娟和张映,国外畜牧学, 2011, 31 (2) : 89-90)。 而前人亦已利用眼镜蛇毒神经生长因子治疗男性生殖缺陷及降低棉酚对 雄性生精功能影响 (ZL 00116192.X) , 但对神经生长因子能否用于治疗迟 发性性腺功能低下综合征尚未有报道。 发明内容
本发明的主要目的在于提供神经生长因子在制备用于治疗中老年男 性性腺功能低下综合征的药物中的用途。 在该应用中, 可以通过鼻腔给药 或者睾丸静脉注射的方式将神经生长因子或其与其他相关治疗剂的组合 物送入患者体内, 用以促进垂体增加促黄体生成激素分泌及诱导睾丸间质 干细胞的增殖分化, 从而增加睾丸和血清中睾酮含量, 最终改善或者治愈 中老年男性性功能低下综合征。
由于神经生长因子已经成为商品化的药物, 其组成, 结构和性质都是 已知, 不同药物剂型的制备也是本领域的常规知识, 因此, 在神经生长因 子的新用途已经能够确认的前提下, 由神经生长因子和相应载体制备的不 同药物剂型也能被本领域技术人员容易实现。
用于本发明的神经生长因子可以包括, 但不限于, 人神经生长因子, 小鼠神经生长因子和大鼠神经生长因子。 优选地, 本发明所用的神经生长 因子为其 β亚基氨基酸序列, 更优选地, 所述神经生长因子的氨基酸序列 如 SEQ ID No: 1-3所示。
本领域技术人员应该理解, 用于本发明的神经生长因子可以从相应地 动物体或组织中提取 (主要是小鼠神经生长因子和大鼠神经生长因子), 或者通过基因工程方法在适当的表达宿主中表达获得相应的重组神经生 长因子。 本发明人在研究中发现, 以神经生长因子为主要有效成分制备的治疗 中老年男性性腺功能低下综合征药物的作用如下:
1. 所述药物对快速老化鼠血清和睾丸中睾酮偏低的治疗作用
以雄性快速老化小鼠 ( Senescence-accelerated mouse prone-8, SAM P8,
32 周龄, 26±2 克 /只) 作为研究对象, 并选用同源正常小鼠 ( Senescence-accelerated resistant mouse prone- 1, SAM Rl, 32周齿令, 26士 2 克 /只) 作为正常对照组。 将小鼠神经生长因子用 0.9%的生理盐水稀释至 1 毫克 /毫升 (mg/mL), 然后按照 250 微克 /公斤体重 g/kg) 通过滴鼻 方式给药, 每 2天给药一次, 连续给药 5周。 模型组则以雄性快速老化小 It ( Senescence-accelerated mouse prone-8 , SAM P8 , 32周齿令, 26士 2克 /只) 作为研究对象, 与正常对照组一样, 用 0.9%生理盐水进行滴鼻, 溶液量及 给药时间与实验组相同。 实验结束后, 收集血清和睾丸。 然后利用放射性 免疫检测方法检测血清以及睾丸内睾酮的含量, 荧光定量链式聚合酶方法 和蛋白杂交方法检测睾酮合成和分泌过程中几个限速酶的表达情况。在血 清睾酮含量分析方面, 神经生长因子治疗组小鼠的血清中, 其睾酮的平均 含量为 18.09纳克 /毫升(ng/ml), 为正常组的 12.3倍, 而仅以生理盐水作 为安慰剂的模型组,其血清中的睾酮含量仅为正常对照组的 5.1%。而在睾 丸内睾酮含量分析方面, 小鼠神经生长因子治疗组小鼠睾丸内睾酮含量与 正常对照组的相当, 两者间没有显著差异, 但均比模型组的高 2.5倍。 这 个实验结果表明, 神经生长因子能够极显著地改善快速老化鼠血清和睾丸 中睾酮的含量。 由于睾酮的合成和分泌是睾丸间质细胞受脑垂体分泌的促 黄体生成激素(Luteinizing hormone, LH)剌激而产生的, 因此, 用滴鼻方 式进入脑部的小鼠神经生长因子可以作用于下丘脑和垂体, 从而改善和增 加睾丸分泌睾酮的功能。 进一歩的分子机制研究表明, 相对于生理盐水处 理的模型组, 小鼠神经生长因子处理组小鼠睾丸间质细胞中的急性激素调 控蛋白 ( Steroidogenic acute regulatory protein, Star) 的表达量显著上升 2 倍以上, 这个结果说明, 小鼠神经生长因子处理组小鼠的血液中促黄体生 成激素增多并调控睾丸间质细胞合成更多的睾酮。
2. 所述药物促进快速老化鼠睾丸间质干细胞的增殖和分化
睾丸间质细胞在分化发育过程中分为四个显著不同的阶段: 间质干细 胞 ( Stem leydig cell, SLC)、 间质祖细胞 (Progenitor leydig cell, PLC)、 幼 稚型间质细胞(Immature leydig cell, ILC)和成年型间质细胞(Adult leydig cell, ALOo 而这些发育过程中由于增殖分化异常、 数量减少及激素合成 分泌功能减退也会导致体内雄激素缺乏。睾丸间质细胞发育分化一般只限 于胚胎发生和青春期初期, 而成年型间质细胞一旦形成, 即使在雄性进入 衰老状态, 其数量也不会发生显著变化。 然而, 近年来有研究表明, 间质 干细胞可以重新增殖并分化成新的年型间质细胞。而间质细胞的再生过程 也是经历了间质祖细胞、 幼稚型间质细胞和成年型间质细胞阶段, 且所有 的雄激素合成酶的信使核糖核酸 (mRNA) 表达及其生理功能都与正常的 睾丸间质细胞没有显著性差异。 这个结果有力地说明, 睾丸中存在"沉默" 状态的间质干细胞, 这些细胞可以再次增殖和分化发育到具有睾酮合成能 力的成年型间质细胞,而这种再生能力与雄性年龄无关(Stanley et al, 2012: Endocrinology, 153(10): 5002—5010)。
将雄性 Sprague-Dawley大鼠 (12-16周龄, 250±20克 /只, 购自中山 大学实验动物中心, 许可证号: SCXK2011-0029 ) 于实验前 7天腹腔注射 乙垸二甲垸硫砜 (Ethane dimethane sulfonate, EDS) (90毫克 /公斤体重, mg/kg ) , 二氧化碳窒息处死后, 取出睾丸, 然后分离曲细精管, 于 DMEM/F-12培养基中 (含 0.1% 小牛血清白蛋白), 34°C培养 16小时。 然后, 将曲细精管分至 24孔板, 加入不同浓度的大鼠神经生长因子及促 黄体生成激素处理 24小时。 用荧光染色剂对细胞核进行染色, 激光共聚 焦及荧光显微镜观察, 结果表明, 单独使用促黄体生成激素(LH)并不能 "激活 "SLC,而大鼠神经生长因子则可以促进 SLC的显著增殖并开始分化, 且该增殖效果与大鼠神经生长因子呈浓度依赖效应 (图 4)。 此外, SLC 是分布在曲细精管表面, 且神经生长因子和神经生长因子受体也广泛存在 于睾丸组织中, 因此, 含大鼠神经生长因子的药物可通过睾丸静脉注射诱 导 SLC进行增殖分化。
进一歩的研究表明, 利用含 100纳克 /毫升 (ng/ml) 人神经生长因子、 0.1%小牛血清白蛋白及 1 纳克 /毫升 (ng/ml) 促黄体生成激素的培养基 ( Dulbecco's Modification of Eagle's Medium/Ham's F-12, DMEM/F- 12 ) 连 续培养曲细精管 8周后,培养液中的睾酮已经可以检测到,最高达到 5.4 纳 克 /孔 (ng/well, 图 5 )。 这个结果可以说明, 促黄体生成激素及人神经生 长因子可以促进睾丸间质干细胞增殖和分化发育至成体间质细胞, 并能合 成和分泌睾酮。
上述研究结果充分证明小鼠、 大鼠以及人源的神经生长因子可以单独 或以与其他相关药剂组合成药物组合物的形式用于治疗中老年男性性腺 功能低下综合征, 其中所述的药物组合物形式, 包括滴鼻剂、 针剂或者针 粉剂。 此外, 药物组合物可以含有其他的相关活性成分, 还可以含有稳定 剂、 改变渗透压的盐、 缓冲液、 或抗氧化剂。
因此, 在本发明的另一个方面, 本发明还提供一种治疗中老年男性迟 发性性腺功能低下综合征的方法, 所述方法包括: 将大鼠神经生长因子、 小鼠神经生长因子或者通过基因工程方法获得人源神经生长因子, 以 40 微克 /公斤体重 ( g/kg) 的剂量通过滴鼻给药方式施用至受试者 (主要是 患有迟发性性腺功能低下综合征的中老年男性), 隔天一次, 一共给药 10 次作为一个疗程, 每个疗程结束后检测血液中睾酮的含量, 依据血液中睾 酮的含量判断是否还需要进行下一疗程的治疗, 直至血液中睾酮的含量达 到正常水平; 或者, 也可以将大鼠神经生长因子、 小鼠神经生长因子或者 通过基因工程方法获得人源神经生长因子, 以 1-3微克 /公斤体重 g/kg) 的剂量通过睾丸静脉给药方式施用至受试者(主要是患有迟发性性腺功能 低下综合征的中老年男性), 每周一次, 一共给药 4次作为一个疗程, 每 个疗程结束后检测血液中睾酮的含量, 依据血液中睾酮的含量判断是否还 需要进行下一疗程的治疗, 直至血液中睾酮的含量达到正常水平。 附图说明
从下面结合附图的详细描述中, 本发明的上述特征和优点将更明显, 其中:
图 1 : 曲细精管表面睾丸间质干细胞增殖和分布(绿色荧光部分显示 正在进行核酸复制活动的细胞核), LH= 促黄体生成激素(LH, 280 ng/ml) +胰岛素-转铁蛋白-亚硒酸钠培养基添加剂 (Insulin- Transferrin- Sodium Selenite, ITS ), PDGF AA=胰岛素-转铁蛋白 -亚硒酸钠培养基添加剂(ITS ) + 血小板衍生生长因子 AA (PDGF AA) , NGF 200 =胰岛素-转铁蛋白-亚 硒酸钠培养基添加剂(ITS) + 大鼠神经生长因子(200ng/ml); NGF100= 胰岛素-转铁蛋白-亚硒酸钠培养基添加剂(ITS) +大鼠神经生长因子(100 ng/ml); NGF10 =胰岛素-转铁蛋白-亚硒酸钠培养基添加剂 (ITS) +大鼠 神经生长因子 10 (10 ng/ml); 血小板衍生生长因子 AA (PDGF AA) 的 浓度为 10纳克 /毫升 (ng/ml), 促黄体生成激素 (LH) 浓度为 280 纳克 / 毫升(ng/ml), 处理 24小时后, Click-iT® EdU HCS Assays试剂盒(货号: C10352, 购自 Invitrogen 公司) 进行核染色, 奥林巴斯 (Olympus) 荧光 显微镜 (100 X ) 拍照;
图 2: 大鼠神经生长因子诱导睾丸间质干细胞增殖分析;
图 3:睾酮合成通路上关键酶基因表达的定量分析,大鼠神经生长因 子的工作浓度为 200纳克 /毫升(ng/ml), 100纳克 /毫升(ng/ml), 10纳克 /毫升 (ng/ml ), 血小板衍生生长因子 AA (PDGF AA)的浓度为 10纳克 / 毫升(ng/ml), 促黄体生成激素(LH)浓度为 280纳克 /毫升(ng/ml), 处 理时间为 72 小时, 而后分别将含有上述各种细胞因子的培养基更换为胰 岛素-转铁蛋白-亚硒酸钠培养基添加剂 (ITS) +促黄体生成激素(LH) 的 培养基继续培养至第 21天, 每 3.5天更换一次培养基, 收集第 14天和第 21天样品提取核糖核酸 (RNA), 逆转录试剂盒 (购自 Invitrogen 公司, 货号: 11753500) 反转录 1 微克 (μ^ RNA, 荧光定量链式聚合酶反应 (Polymerase Chain Reaction, PCR) 检测各个基因的表达情况。 胰岛素-转 铁蛋白-亚硒酸钠培养基添加剂 (ITS) 组作为对照组, 内参为核糖体蛋白 S16基因(RPS16,其引物序列由深圳华大基因研究院合成), *** /?<0.001, ** p<0.0\, */?<0.05, vs ITS. n=5; a*** P < 0.001, b** P < 0.01禾口 c*P < 0.05, 促黄体生成激素 (LH), n=5。
图 4:放射性免疫方法分析培养基中睾酮含量, 人神经生长因子的浓 度为 200纳克 /毫升(ng/ml), 100纳克 /毫升(ng/ml), 10纳克 /毫升(ng/ml), 血小板衍生生长因子 AA (PDGFAA) 的浓度为 10纳克 /毫升 (ng/ml), 促黄体生成激素 (LH) 浓度为 280纳克 /毫升 (ng/ml), 处理时间为 72小 时,而后将含有分别将含有上述各种细胞因子的培养基更换为胰岛素 -转铁 蛋白-亚硒酸钠培养基添加剂 (ITS) +促黄体生成激素 (LH) 的培养基继 续培养至第 21天,每 3.5天更换一次培养基, 收集第 14天和第 21天的培 养基上清, 放射性免疫试剂盒 (购自北京北方生物技术研究所, 货号:
B10TFB)检测上清睾酮。 胰岛素-转铁蛋白-亚硒酸钠培养基添加剂(ITS) 组作为对照组, 内参为 40S核糖体蛋白 S16基因 (RPS16, 其引物序列由 华大基因研究院合成), * P<0.05, **Ρ<0.01和 *** Ρ<0.001 对照组 a*** P<0.00\, b** P<0.0\和 c* P<0.05, vs 促黄体生成激素 (LH), vs 促黄体生成激素 (LH) n=5。
图 5: 快速老化鼠血清睾酮含量分析, 正常小鼠为同系的 SAM R1 系列, 模型组小鼠为 SAMP8小鼠 (购自天津中医药大学, 合格证号: W -J津实动质 M准字第 006号, 26±2克 /只), 小鼠神经生长因子组小鼠 的给药剂量为 250 微克 /公斤体重 ( g/kg), 隔天鼻腔给药, 连续给药 5 周, 眼球取血, 收集血清, 放射性免疫方法检测体内睾酮, ***Ρ<0.001 τ¾ 正常
图 6: 快速老化鼠睾丸内睾酮含量分析, 将睾丸去除被膜后, 放入匀 浆器, 按 1:5 (质量: 体积) 的比例加入预冷的磷酸盐缓冲液, 4°C摇床过 夜, 次日以 3000转 /分钟离心 15分钟后取上清, -20°C保存, 放射性免疫 法检测睾酮, ** Ρ<0.01τ¾对照, η=4。
图 7:快速老化鼠睾丸间质细胞内合成和分泌睾酮的关键酶基因定量 PCR检测分析, 小鼠神经生长因子组小鼠的给药剂量为 250 微克 /公斤体 重 g/kg),鼻腔隔天给药,连续给药 5周, 睾丸样品提取核糖核酸 (RNA), 逆转录试剂盒(购自 Invitrogen 公司,货号: 11753500)反转录 1微克(μ^ 核糖核酸(RNA), 42°C逆转录 30分钟后, 85°C处理 5分钟终止反应。 40S 核糖体蛋白 S16基因 (RPS16, 其引物序列由华大基因研究院合成) 作为 内参, 荧光定量链式聚合酶反应 (PCR) 检测睾酮合成通路上相关酶的表 达情况, * P < 0.05, **Ρ <0.01和 <0.001,· ^对照 η=4。
图 8:快速老化鼠曲细精管内支持细胞睾酮转运蛋白基因的表达分析 情况,小鼠神经生长因子组小鼠的给药剂量为 250微克 /公斤体重 g/kg), 鼻腔隔天给药, 连续给药 5周, 睾丸样品提取核糖核酸 (RNA), 逆转录 试剂盒反转 1微克 g)核糖核酸(RNA), 42°C逆转录 30分钟后, 85°C 处理 5分钟终止反应。 40S核糖体蛋白 S16基因 (RPS16, 其引物序列由 华大基因研究院合成) 作为内参, 荧光定量链式聚合酶反应 (PCR) 检测 睾酮合成通路上相关酶的表达情况, < 0.05, ** Ρ <0.01和 < 0.001; ^对照 η=4。
图 9:快速老化鼠睾丸总蛋白杂交检测结果分析, 小鼠神经生长因子 组小鼠的给药剂量为 250微克 /公斤体重 g/kg), 鼻腔隔天给药, 连续给 药 5周, 睾丸样品提取蛋白, 蛋白杂交方法检测蛋白表达情况。 荧光定 量链式聚合酶反应(PCR)检测睾酮结合蛋白(Androgen Bingding Protein, ABP) 基因的表达情况, * P < 0.05, ** Ρ <0.01和 <0.001,ra对 照 n=4。 序列表说明
Figure imgf000010_0001
具体实施方式
下面参照具体的实施例进一歩描述本发明, 但是本领域技术人员应该 理解, 本发明并不限于这些具体的实施例。
另外, 本领域技术人员应该理解, 除非另外指明, 下述实施例中所用 的试剂均为市售试剂。
实施例 1: 检测大鼠神经生长因子对大鼠睾丸间质细胞的促增殖作用
材料: Commg 12孔板(购自美国康宁公司, 货号: 3336), 睾酮放射 性免疫检测试剂盒 (购自 北京北方生物技术研究所, 货号: B10TFB ) , 人神经生长因子 (购自西格玛奥德里奇上海贸易有限公司, 货号: N1408-.1MG) , 大鼠神经生长因子 (购自西格玛奥德里奇上海贸易有限公 司, 货号: N2513-1MG)或者小鼠神经生长因子(购自西格玛奥德里奇上 海贸易有限公司, 货号: SRP4304-20UG) , 胰岛素-转铁蛋白 -亚硒酸钠培 养基添加剂(ITS ,购自西格玛奥德里奇上海贸易有限公司,货号: 11884), 促黄体生成激素 (LH, 购自西格玛奥德里奇上海贸易有限公司, 货号: L9773 ) , 乙垸二甲垸硫砜(EDS , 由中山大学化工学院合成, 合成方法参 见 Jackson H. Comparative effects of some antispermatogenic chemicals. In: Segal SJ, Crazier R, Corfman PA, Cordliffe PC, eds. The regulation of mammalian reproduction. Illinois: Springfield Press, 1973; 257-268. ), Click-iT® EdU HCS Assays检测试剂盒 (购自 美国 life technologies公司, 货号: C10352) , DMEM/F-12培养基(购自美国 life technologies公司, 货 号: 0930152DK) , Bio-Rad cDNA合成试剂盒和 Bio-Rad SYBR荧光染料
(购自美国 Bio-Rad公司, 货号: 170-8890、 170-8880), 总 RNA抽提试 剂盒 (购自德国 QIAGEN公司, 货号: 74104)。
雄性 Sprague-Dawley大鼠 (购自广东省医学动物实验中心, 12周龄, 250±20克 /只) 实验前 7天腹腔注射乙垸二甲垸硫砜(EDS , 90毫克 /公斤 体重), 二氧化碳处死后, 将睾丸取出, 置于冰冷的磷酸缓冲液中, 剪除 被膜, 将曲细精管分离成单根后, 于 DMEM/F-12培养基中 (含 0.1% 牛 血清白蛋白和 lx胰岛素-转铁蛋白 -亚硒酸钠培养基添加剂) 34°C, 5% 二 氧化碳的条件下培养过夜。 次日, 将曲细精管分至 24孔板中, 加入不同 浓度的细胞因子 (即, 血小板衍生生长因子 AA或者神经生长因子) 处理 曲细精管, 具体分组为胰岛素-转铁蛋白-亚硒酸钠培养基添加剂(ITS )组
(阴性对照), 促黄体生成激素(LH) +胰岛素-转铁蛋白-亚硒酸钠培养基 添加剂(ITS)组, 血小板衍生生长因子 AA (PDGF AA) +胰岛素-转铁蛋 白-亚硒酸钠培养基添加剂 (ITS) 组 (阳性对照组), 胰岛素-转铁蛋白-亚 硒酸钠培养基添加剂 (ITS ) + 大鼠神经生长因子组, 大鼠神经生长因子 的浓度为 200 纳克 /毫升 (ng/ml), 100纳克 /毫升 (ng/ml), 10纳克 /毫升
(ng/ml) , 血小板衍生生长因子 AA (PDGF AA) 的浓度为 10纳克 /毫升
(ng/ml) , 促黄体生成激素 (LH) 浓度为 280 纳克 /毫升 (ng/ml) , 处理 24小时后, Click-iT® EdU HCS Assays试剂盒 (购自 Invitrogen 公司, 货 号: C10352 , ) 进行核染色 (如图 1 )。
结果显示, 大鼠神经生长因子处理组中, 200纳克 /毫升(ng/ml) , 100 纳克 /毫升 (ng/ml) 和 10纳克 /毫升 (ng/ml) 的剂量都可以促进间质干细 胞 (Stem Leydig Cell, SLC) 的增殖, 但是与 100纳克 /毫升 (ng/ml) 和 10纳克 /毫升(ng/ml) 处理组相比, 200纳克 /毫升(ng/ml)处理组能够显 著地促进睾丸间质干细胞 (SLC) 的增殖 (P < 0.001 对照:), 并且其促 增值作用要强于促黄体生成激素(LH)处理组, 说明大鼠神经生长因子对 睾丸间质干细胞 (SLC) 的促进作用存在剂量依赖效应。 实施例 2: 检测大鼠神经生长因子对大鼠睾丸间质干细胞的促分化作用 雄性 SPRAGUE-DAWLEY大鼠 (购自广东省医学动物实验中心, 12 周龄, 250±20 克 /只) 实验前 7天腹腔注射乙垸二甲垸硫砜 (EDS, 90 毫 克 /公斤体重), 二氧化碳处死后, 将睾丸取出, 置于冰冷的磷酸缓冲液中, 剪除被膜, 血管与曲细精管剥离, 将曲细精管分离成单根, 于 DMEM/F-12 培养基中(含 0.1% 牛血清白蛋白和 lx胰岛素-转铁蛋白-亚硒酸钠培养基 添加剂) 34°C, 5% 二氧化碳的条件下培养过夜。 次日, 将曲细精管分至 24孔板, 加入大鼠神经生长因子处理, 大鼠神经生长因子的浓度为 200纳 克 /毫升 (ng/ml), 100纳克 /毫升 (ng/ml), 10纳克 /毫升 (ng/ml), 血小板 衍生生长因子 AA (PDGF AA) 的浓度为 10纳克 /毫升 (ng/ml), 促黄体生 成激素 (LH) 浓度为 280纳克 /毫升 (ng/ml), 处理时间为 72小时, 而后分 别将含有上述各种细胞因子的培养基更换为胰岛素-转铁蛋白 -亚硒酸钠培 养基添加剂 (ITS) +促黄体生成激素 (LH) 的培养基继续培养至第 21天, 每 3.5天更换一次培养基, 收集第 14天和第 21天的培养基上清待测睾酮, 收 集第 14天和 21天样品提取 RNA, 逆转录试剂盒 (购自 Invitrogen 公司, 货 号: 11753500 ) 反转录 1微克 (μ^核糖核酸(RNA) , 42°C逆转录 30分钟 后, 85°C处理 5分钟终止反应, 40S核糖体蛋白 S16基因(40S核糖体蛋白 S16 基因 (RPS16, 其引物序列由华大基因合成) 作为内参, 荧光定量 PCR检 测睾酮合成通路上相关酶的表达情况 (如图 2)。
第 14天, 各处理对睾酮合成通路中各个酶的表达情况影响不一, 类 固醇激素合成急性调节蛋白( Steroidogenic acute regulatory protein, StAR) 基因方面, 大鼠神经生长因子 100纳克 /毫升 (ng/ml) 组显著地促进了类 固醇激素合成急性调节蛋白 (StAR), 羟基 -δ-5-类固醇脱氢酶, 3 beta-and 固酉享 δ异构酶 1 ( hydroxy-delta-5 -steroid dehydrogenase, 3 beta- and steroid delta-isomerase 1, hsd3bl ) 禾 Π 17β-羟基类固醇脱氢酶 3 (hydroxysteroid (17-beta) dehydrogenase 3, hsd 17b3 )三个基因的上调表达, 其促表达作用 明显优于促黄体生成激素 (LH) 处理组; 而大鼠神经生长因子 200纳克 / 毫升 (ng/ml) 组促进了 17β-羟基类固醇脱氢酶 3 (Hsdl7b3 ) 和 5α-还原 酶 1 ( steroid-5-alpha-reductase, Srd5al ) 基因的表达上调, 而没有影响类 固醇激素合成急性调节蛋白 (StAR), 羟基 -δ-5-类固醇脱氢酶, 3 β和类固 醇 δ异构酶 1 (hsd3bl )基因的表达; 神经生长因子 10纳克 /毫升(ng/ml) 组均没有对几个基因的表达出现明显地促进作用。 第 21 天, 大鼠神经生 长因子 200纳克 /毫升(ng/ml)组,大鼠神经生长因子 100纳克 /毫升(ng/ml) 组和神经生长因子 10 ng/ml组均显著地促进了类固醇激素合成急性调节蛋 白 (StAR), 羟基 -δ-5-类固醇脱氢酶,3 beta-and固醇 δ异构酶 1 (hsd3bl ) 和 17β-羟基类固醇脱氢酶 3 (hsd 17b3 ) 三个基因的上调表达, 大鼠神经 生长因子 200纳克 /毫升 (ng/ml) 组的促进作用明显优于促黄体生成激素
(LH) 组, 而大鼠神经生长因子 100纳克 /毫升 (ng/ml) 组和神经生长因 子 10纳克 /毫升 (ng/ml) 组的促进作用不如促黄体生成激素 (LH) 组明 显。 在 5α-还原酶 1 ( Srd5al ) 基因方面, 大鼠神经生长因子 10纳克 /毫升
(ng/ml) 促进其高表达, 其作用效果与促黄体生成激素 (LH) 组基本一 致。 而大鼠神经生长因子 200纳克 /毫升 (ng/ml) 组和神经生长因子 100 纳克 /毫升 (ng/ml) 组均没有促进其高表达 (图 3 )。 实施例 3: 放射性免疫方法分析培养基中睾酮含量
取 90天 SAM R1小鼠 (3月龄, 体重 26 ± 2 g), 无菌状态下用镊子 抽取其睾丸中的曲细精管, 用磷酸缓冲液冲洗 6次后, 再用 DMEM/F-12 培养基冲洗 3次, 加入终浓度为 375 微克 /毫升 (ug/ml) 的乙垸二甲垸硫 砜(EDS )至含 0.1%的小牛血清白蛋白的 DMEM/F-12培养基中, 处理 24 小时。 洗涤 3次后, 换新鲜培养基, 然后置于 34°C及 5%二氧化碳的环境 中培养, 每隔 3.5天换一次含有不同浓度 (10、 100和 200纳克 /毫升) 的 人神经生长因子、黄体生成激素(LH)和血小板衍生生长因子 AA (PDGF AA) 的细胞培养基。 最后通过放射性免疫方法分析培养基中睾酮含量。 实验结果表明, 14天时, 神经生长因子 10纳克 /毫升 (ng/ml) 明显促进 睾酮的分泌, 其余各组均没有出现明显变化; 21天时, 各处理组的睾酮分 泌均出现明显上调, 尤其以大鼠神经生长因子 10纳克 /毫升(ng/ml)处理 组的睾酮变化最为明显; 各神经生长因子处理组的促睾酮分泌能力与促黄 体生成激素(LH)组相比, 均没有明显差异, 说明其促进睾酮分泌的能力 与促黄体生成激素 (LH) 组差异不大 (图 4)。
实施例 4: 神经生长因子对快速老化鼠的治疗作用
雄性 SAM P8和 SAM R1小鼠(购自天津中医药大学第一附属医院动 物中心, 8月龄, 体重 26 ± 2 g) 12只: 模型组 5只, 小鼠神经生长因子 组 5只, 正常组 5只; 鼻腔隔天给药, 连续给药 5周, 神经生长因子组的 给药量为 250微克 /公斤体重 g/kg); 眼球取血, 收集睾丸, 放射性免疫 方法检测体内睾酮; 荧光定量脸上聚合酶反应和蛋白杂交方法检测几个酶 在不同水平的表达情况。 放射性免疫检测结果显示, 神经生长因子能够显 著恢复模型组小鼠血清中和睾丸内的睾酮含量。其内睾酮的恢复水平与正 常组相当 (图 5-6); 荧光定量 PCR的结果显示, 在睾酮合成通路类固醇 激素合成急性调节蛋白 (StAR), 胆固醇侧链裂解酶 (cytochrome P450, family 11, subfamily a, polypeptide 1, Cypllal ),羟基 -δ-5-类固醇脱氢酶, 3 β 和类固醇 δ异构酶 1 (hsd3bl ), 17β-羟基类固醇脱氢酶 3 (Hsdl7b3 ) , 5α- 还原酶 1 ( Srd5al ) 的表达方面, 小鼠神经生长因子处理组胆固醇侧链裂 解酶 (Cypllal ) 基因的表达出现明显的上调迹象 (图 7, 图 9), 与睾酮 运输有关的雄激素结合蛋白 (ABP) 基因的表达也出现明显上调迹象 (图 8 ), 其血清睾酮和睾丸睾酮的恢复可能与这两个基因表达的大量上调有 关。 应该理解, 尽管参考其示例性的实施方案, 已经对本发明进行具体地 显示和描述, 但是本领域的普通技术人员应该理解, 在不背离由权利要求 书所定义的本发明的精神和范围的条件下, 可以在其中进行各种形式和细 节的变化, 可以进行各种实施方案的任意组合。 因此, 本发明的范围包括 在权利说明书等同目的和范围内的所用修改。

Claims

权利要求书:
1. 神经生长因子在制备用于治疗中老年男性性功能低下综合征的药 物中的用途。
2. 权利要求 1所述的用途,其中所述神经生长因子来源于人、小鼠或 大鼠。
3. 权利要求 1 所述的用途, 其中所述神经生长因子的氨基酸序列如 SEQ ID No: 1-3所示。
4. 权利要求 1所述的用途,其中所述药物除了包含有效量的神经生长 因子外还包含一种或多种其他有效用于治疗老年男性性功能低下综合征 的药物活性成分, 例如促黄体生成激素、 血小板衍生生长因子 AA。
5. 权利要求 1所述的用途,其中所述药物的剂型包括滴鼻剂、针剂或 针粉剂。
6. 一种治疗中老年男性性功能低下综合征的药物,所述药物包含治疗 有效量的神经生长因子作为主要活性成分以及药学上可接受的载体。
7. 权利要求 6所述的药物, 其中所述神经生长因子来源于人、小鼠或 大鼠。
8. 权利要求 6 所述的药物, 其中所述神经生长因子的氨基酸序列如 SEQ ID No: 1-3所示。
9. 权利要求 6所述的药物,其中所述药物还包含一种或多种其他有效 用于治疗老年男性性功能低下综合征的药物活性成分, 例如促黄体生成激 素、 血小板衍生生长因子 AA。
10. 权利要求 6所述的药物, 其中所述药物的剂型包括滴鼻剂、 针剂 或针粉剂。
11. 一种用于治疗受试者中的中老年男性性功能低下综合征的方法, 所述方法包括给所述受试者施用有效量的神经生长因子, 其中所述神经生 长因子的氨基酸序列如 SEQ ID No: 1-3所示。
12. 权利要求 11所述的方法,所述方法还包括给所述受试者施用一种 或多种其他有效用于治疗老年男性性功能低下综合征的药物活性成分, 例 如促黄体生成激素、 血小板衍生生长因子 AA。
PCT/CN2013/089052 2012-12-14 2013-12-11 神经生长因子在制备用于治疗中老年男性性功能低下综合征的药物中的用途 WO2014090152A1 (zh)

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