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Zheng KX, Yuan SL, Dong M, Zhang HL, Jiang XX, Yan CL, Ye RC, Zhou HQ, Chen L, Jiang R, Cheng ZY, Zhang Z, Wang Q, Jin WZ, Xie W. Dihydroergotamine ameliorates liver fibrosis by targeting transforming growth factor β type II receptor. World J Gastroenterol 2023; 29:3103-3118. [PMID: 37346154 PMCID: PMC10280794 DOI: 10.3748/wjg.v29.i20.3103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 04/01/2023] [Accepted: 04/24/2023] [Indexed: 05/26/2023] Open
Abstract
BACKGROUND The transforming growth factor β (TGFβ) signaling pathway plays a crucial role in the development of liver fibrosis by activating TGFβ type II receptor (TGFβR2), followed by the recruitment of TGFβR1 finally triggering downstream signaling pathway.
AIM To find drugs targeting TGFβR2 that inhibit TGFβR1/TGFβR2 complex formation, theoretically inhibit TGFβ signaling pathway, and thereby ameliorate liver fibrosis.
METHODS Food and Drug Administration-approved drugs were screened for binding affinity with TGFβR2 by virtual molecular docking. We identified 6 candidates and further explored their potential by Cell Counting Kit-8 (CCK-8) cell cytotoxic experiment to validate toxicity and titrated the best cellular working concentrations. Next, we further demonstrated the detailed molecular working mechanisms using mutagenesis analysis. Finally, we used a mouse model to investigate its potential anti-liver fibrosis effect.
RESULTS We identified 6 drug candidates. Among these 6 drugs, dihydroergotamine (DHE) shows great ability in reducing fibrotic gene expressions such as collagen, p-SMAD3, and α-SMA in TGFβ induced cellular model of liver fibrosis in LX-2 cells. Furthermore, we demonstrated that DHE binds to TGFβR2. Moreover, mutation of Leu27, Phe30, Thr51, Ser52, Ile53, and Glu55 of TGFβR2 disrupted the binding of TGFβR2 with DHE. In addition, DHE significantly improved liver fibrosis, as evidenced by Masson’s trichrome staining of liver sections. This is further supported by the width and the velocity of the portal vein, and serum markers of liver function. In line with those observations, DHE also decreased macrophages infiltration and extracellular matrix deposition in the liver.
CONCLUSION DHE alleviates liver fibrosis by binding to TGFβR2 thereby suppressing TGFβ signaling pathway. We show here that as far as drug repurposing, DHE has great potential to treat liver fibrosis.
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Affiliation(s)
- Ke-Xin Zheng
- Center of Liver Diseases, Beijing Ditan Hospital, Capital Medical University, Beijing 100015, China
| | - Shou-Li Yuan
- Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
- Graduate School, University of the Chinese Academy of Sciences, Beijing 100049, China
| | - Meng Dong
- Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Han-Lin Zhang
- Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
- Graduate School, University of the Chinese Academy of Sciences, Beijing 100049, China
| | - Xiao-Xiao Jiang
- Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
- Graduate School, University of the Chinese Academy of Sciences, Beijing 100049, China
| | - Chun-Long Yan
- Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
- Graduate School, Agriculture College of Yanbian University, Yanji 133002, Jilin Province, China
| | - Rong-Cai Ye
- Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
- Graduate School, University of the Chinese Academy of Sciences, Beijing 100049, China
| | - Hui-Qiao Zhou
- Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
- Graduate School, University of the Chinese Academy of Sciences, Beijing 100049, China
| | - Li Chen
- Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
- Graduate School, University of the Chinese Academy of Sciences, Beijing 100049, China
| | - Rui Jiang
- Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
- Graduate School, University of the Chinese Academy of Sciences, Beijing 100049, China
| | - Zi-Yu Cheng
- Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
- Graduate School, University of the Chinese Academy of Sciences, Beijing 100049, China
| | - Zhi Zhang
- Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
- Graduate School, University of the Chinese Academy of Sciences, Beijing 100049, China
| | - Qi Wang
- Center of Liver Diseases, Beijing Ditan Hospital, Capital Medical University, Beijing 100015, China
| | - Wan-Zhu Jin
- Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Wen Xie
- Center of Liver Diseases, Beijing Ditan Hospital, Capital Medical University, Beijing 100015, China
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2
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Yan CL, Lin J, Huang YY, Gao QS, Piao ZY, Yuan SL, Chen L, Ren X, Ye RC, Dong M, Zhang HL, Zhou HQ, Jiang XX, Jin WZ, Zhou XM, Yan CG. Population genomics reveals that natural variation in PRDM16 contributes to cold tolerance in domestic cattle. Zool Res 2022; 43:275-284. [PMID: 35238185 PMCID: PMC8920848 DOI: 10.24272/j.issn.2095-8137.2021.360] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Environmental temperature serves as a major driver of adaptive changes in wild organisms. To discover the mechanisms underpinning cold tolerance in domestic animals, we sequenced the genomes of 28 cattle from warm and cold areas across China. By characterizing the population structure and demographic history, we identified two genetic clusters, i.e., northern and southern groups, as well as a common historic population peak at 30 kilo years ago. Genomic scan of cold-tolerant breeds determined potential candidate genes in the thermogenesis-related pathways that were under selection. Specifically, functional analysis identified a substitution of PRDM16 (p.P779L) in northern cattle, which maintains brown adipocyte formation by boosting thermogenesis-related gene expression, indicating a vital role of this gene in cold tolerance. These findings provide a basis for genetic variation in domestic cattle shaped by environmental temperature and highlight the role of reverse mutation in livestock species.
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Affiliation(s)
- Chun-Long Yan
- College of Agriculture, Yanbian University, Yanji, Jilin 133000, China
| | - Jun Lin
- Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Yuan-Yuan Huang
- Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Qing-Shan Gao
- College of Agriculture, Yanbian University, Yanji, Jilin 133000, China.,North-East Cold Region Beef Cattle Science & Technology Innovation Ministry of Education Engineering Research Center, Yanbian University, Yanji, Jilin 133000, China
| | - Zheng-Yu Piao
- College of Agriculture, Yanbian University, Yanji, Jilin 133000, China.,North-East Cold Region Beef Cattle Science & Technology Innovation Ministry of Education Engineering Research Center, Yanbian University, Yanji, Jilin 133000, China
| | - Shou-Li Yuan
- Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Li Chen
- Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xue Ren
- Annoroad Gene Technology Co. Ltd, Beijing 100176, China
| | - Rong-Cai Ye
- Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Meng Dong
- Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Han-Lin Zhang
- Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hui-Qiao Zhou
- Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiao-Xiao Jiang
- Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Wan-Zhu Jin
- Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China.,University of Chinese Academy of Sciences, Beijing 100049, China. E-mail:
| | - Xu-Ming Zhou
- Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China.E-mail:
| | - Chang-Guo Yan
- College of Agriculture, Yanbian University, Yanji, Jilin 133000, China.,North-East Cold Region Beef Cattle Science & Technology Innovation Ministry of Education Engineering Research Center, Yanbian University, Yanji, Jilin 133000, China. E-mail:
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3
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Cao X, Shi TT, Zhang CH, Jin WZ, Song LN, Zhang YC, Liu JY, Yang FY, Rotimi CN, Xu A, Yang JK. Correction: ACE2 pathway regulates thermogenesis and energy metabolism. eLife 2022; 11:78698. [PMID: 35315773 PMCID: PMC8940172 DOI: 10.7554/elife.78698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Accepted: 03/16/2022] [Indexed: 11/13/2022] Open
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4
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Wang LF, Miao LJ, Wang XN, Huang CC, Qian YS, Huang X, Wang XL, Jin WZ, Ji GJ, Fu M, Deng KY, Xin HB. CD38 deficiency suppresses adipogenesis and lipogenesis in adipose tissues through activating Sirt1/PPARγ signaling pathway. J Cell Mol Med 2017; 22:101-110. [PMID: 28816006 PMCID: PMC5742727 DOI: 10.1111/jcmm.13297] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Accepted: 03/09/2017] [Indexed: 01/03/2023] Open
Abstract
It has been recently reported that CD38 was highly expressed in adipose tissues from obese people and CD38-deficient mice were resistant to high-fat diet (HFD)-induced obesity. However, the role of CD38 in the regulation of adipogenesis and lipogenesis is unknown. In this study, to explore the roles of CD38 in adipogenesis and lipogenesis in vivo and in vitro, obesity models were generated with male CD38-/- and WT mice fed with HFD. The adipocyte differentiations were induced with MEFs from WT and CD38-/- mice, 3T3-L1 and C3H10T1/2 cells in vitro. The lipid accumulations and the alternations of CD38 and the genes involved in adipogenesis and lipogenesis were determined with the adipose tissues from the HFD-fed mice or the MEFs, 3T3-L1 and C3H10T1/2 cells during induction of adipocyte differentiation. The results showed that CD38-/- male mice were significantly resistant to HFD-induced obesity. CD38 expressions in adipocytes were significantly increased in WT mice fed with HFD, and the similar results were obtained from WT MEFs, 3T3-L1 and C3H10T1/2 during induction of adipocyte differentiation. The expressions of PPARγ, AP2 and C/EBPα were markedly attenuated in adipocytes from HFD-fed CD38-/- mice and CD38-/- MEFs at late stage of adipocyte differentiation. Moreover, the expressions of SREBP1 and FASN were also significantly decreased in CD38-/- MEFs. Finally, the CD38 deficiency-mediated activations of Sirt1 signalling were up-regulated or down-regulated by resveratrol and nicotinamide, respectively. These results suggest that CD38 deficiency impairs adipogenesis and lipogenesis through activating Sirt1/PPARγ-FASN signalling pathway during the development of obesity.
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Affiliation(s)
- Ling-Fang Wang
- Institute of Translational Medicine, Nanchang University, Nanchang, China.,School of Life Sciences, Nanchang University, Nanchang, China
| | - Lian-Jie Miao
- Institute of Translational Medicine, Nanchang University, Nanchang, China.,School of Life Sciences, Nanchang University, Nanchang, China
| | - Xiao-Nv Wang
- Institute of Translational Medicine, Nanchang University, Nanchang, China
| | - Cong-Cong Huang
- Institute of Translational Medicine, Nanchang University, Nanchang, China
| | - Yi-Song Qian
- Institute of Translational Medicine, Nanchang University, Nanchang, China
| | - Xuan Huang
- Institute of Translational Medicine, Nanchang University, Nanchang, China
| | - Xiao-Lei Wang
- Institute of Translational Medicine, Nanchang University, Nanchang, China
| | - Wan-Zhu Jin
- Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Guang-Ju Ji
- National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China
| | - Mingui Fu
- Department of Basic Medical Science, Shock/Trauma Research Center, School of Medicine, University of Missouri Kansas City, Kansas City, MO, USA
| | - Ke-Yu Deng
- Institute of Translational Medicine, Nanchang University, Nanchang, China
| | - Hong-Bo Xin
- Institute of Translational Medicine, Nanchang University, Nanchang, China
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5
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Li C, Watanabe G, Weng Q, Jin W, Furuta C, Suzuki AK, Kawaguchi M, Taya K. Expression of nerve growth factor (NGF), and its receptors TrkA and p75 in the reproductive organs of the adult male rats. Zoolog Sci 2006; 22:933-7. [PMID: 16141707 DOI: 10.2108/zsj.22.933] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Immunolocalization of nerve growth factor (NGF) and its receptors, TrkA and p75 in the reproductive organs of adult male rats was investigated. Sections of the testis, efferent duct, epididymis, deferent duct, seminal vesicle, coagulating gland and prostate of adult male rats were immunostained by the avidin-biotin-peroxidase complex methods (ABC). NGF was expressed in Leydig cells, primary spermatocytes and pachytene spermatocytes in the testis. TrkA only immunoreacted to elongate spermatids and p75 showed positive immunostaining in the Sertoli cells, Leydig cells, the pachytene spermatocytes and elongate spermatids. Immunoreactions for NGF and its two receptors were detected in epithelial cells of efferent duct, deferent duct and epididymis. In addition, immunoreactions for NGF and its two receptors were also observed in columnar secretory epithelium lines of the seminal vesicles, prostate and coagulating gland. These results suggest that NGF is an important growth factor in gonadal function of adult male rats.
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Affiliation(s)
- ChunMei Li
- Department of Basic Veterinary Science, The United Graduate School of Veterinary Sciences, Gifu University, Gifu 501-1193, Japan
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6
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Weng Q, Wang H, S Medan M, Jin W, Xia G, Watanabe G, Taya K. Expression of Inhibin/Activin Subunits in the Ovaries of Fetal and Neonatal Mice. J Reprod Dev 2006; 52:607-16. [PMID: 16807503 DOI: 10.1262/jrd.18026] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
In the present study, the expression of inhibin/activin subunits in the mouse ovary from 13 days post-coitus (dpc) to 30 days postpartum (dpp) was investigated. Circulating FSH, LH, inhibin A, and inhibin B in neonatal to 30 dpp ovaries were measured. Inhibin/activin subunits (alpha, beta(A), beta(B) ) were weakly stained in 13 dpc ovarian stromal cells and increased with age. Inhibin alpha subunit was immunolocalized in follicular granulosa cells at each developmental stage. In 30 dpp ovaries, several large antral follicles were strongly stained for inhibin alpha subunit. Inhibin beta(A) subunit was weakly immunolocalized in granulosa cells until 20 dpp. Moreover, 2 to 3 antral follicles from 20 to 30 dpp were strongly stained for inhibin beta(A) subunit. There was relatively high immunoactivity for inhibin beta(B) subunit in neonatal to 30 dpp mouse ovaries. All three inhibin subunits were stained in theca-interstitial cells from 15 dpp onward. RIA data showed that a temporal increase in circulating FSH occurred around 10 dpp, while the plasma concentrations of LH were sustained at a relatively higher level from 8 to 15 dpp. Inhibin B was detectable in circulation early at 1 dpp (day of birth), and a clear increase in inhibin B occurred around 8 dpp. Circulating inhibin B gradually increased from 20 dpp to 30 dpp, indicating a negative correlation with FSH. Inhibin A levels were only measured on 25 and 30 dpp, and the levels were low. These results suggest that inhibins play an important role in early folliculogenesis in mice. In addition, inhibin B seems to be the main functional isoform from the neonatal to prepubertal stage in the mouse ovary.
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Affiliation(s)
- Qiang Weng
- Faculty of Biological Science and Technology, Beijing Forestry University, Beijing, PR, China
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7
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Itoh M, Kondo M, Kojima C, Jin W, Watanabe G, Taya K, Hayashi M, Shimizu K. Inhibin B is the major form of inhibin secreted from testes in male Japanese macaques ( Macaca fuscata). Primates 2003; 44:253-7. [PMID: 12884116 DOI: 10.1007/s10329-003-0041-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2002] [Accepted: 02/06/2003] [Indexed: 10/26/2022]
Abstract
In order to clarify the cellular source and forms of bioactive inhibin in male Japanese macaques ( Macaca fuscata), circulating concentrations of inhibin A and B, and immunohistochemical localization of inhibin subunits in testis were studied. Plasma concentrations of testosterone were also measured. The present study showed that inhibin B was clearly detected in the plasma of male Japanese macaques. Moreover, concentrations of both inhibin B and testosterone during the breeding (mating) season were significantly higher than those of the non-breeding season. On the other hand, plasma inhibin A was detected neither during the breeding seasons nor during the non-breeding seasons. Positive stainings with alpha and betaB subunit antibodies were observed in the Sertoli cells, however staining with betaA subunit antibody was not observed in the testicular samples. These results indicate that inhibin B is the major circulating inhibin and probably secreting from Sertoli cells in male Japanese macaques.
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Affiliation(s)
- Mariko Itoh
- Department of Cellular and Molecular Biology, Primate Research Institute, Kyoto University, Kanrin, Aichi 484-8506, Japan
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8
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Kojima C, Kondo M, Jin W, Shimizu K, Itoh M, Watanabe G, Groome NP, Taya K. Secretion of inhibin A and inhibin B during pregnancy and early postpartum period in Japanese monkeys. Endocrine 2002; 18:21-5. [PMID: 12166620 DOI: 10.1385/endo:18:1:21] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/25/2002] [Revised: 04/05/2002] [Accepted: 04/05/2002] [Indexed: 11/11/2022]
Abstract
In order to determine the profiles and sources of inhibin A and inhibin B during pregnancy in Japanese monkeys, serum samples were collected from eight monkeys for measuring concentrations of both inhibins by enzyme-linked immunosorbent assay. The term placenta was used for the localization of inhibin alpha-, betaA-, and betaB-subunits by immunohistochemistry. Serum concentrations of inhibin A showed a significant rise at the second quarter and maintained its level until term. Serum concentrations of inhibin B gradually increased until the fourth quarter. The concentration of both inhibins abruptly declined after delivery to the nonpregnant level. Positive staining of inhibin alpha-, betaA-, and betaB-subunits was observed in syncytiotrophoblast in the placenta by immunohistochemistry. These results demonstrated that large amounts of both dimeric inhibins are secreted from the placenta of Japanese monkeys.
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Affiliation(s)
- Chihiro Kojima
- Laboratory of Veterinary Physiology, Tokyo University of Agriculture and Technology, Fuchu, Japan
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9
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Tsukue N, Toda N, Tsubone H, Sagai M, Jin WZ, Watanabe G, Taya K, Birumachi J, Suzuki AK. Diesel exhaust (DE) affects the regulation of testicular function in male Fischer 344 rats. J Toxicol Environ Health A 2001; 63:115-126. [PMID: 11393798 DOI: 10.1080/15287390151126441] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
To investigate the effects of diesel exhaust (DE) particles on the reproductive system, male Fischer 344 rats at 13 mo of age were exposed to clean air or DE at particle concentrations of 0.3, 1, or 3 mg/m3 for 8 mo. DE did not markedly affect testicular and body weights. However, DE at 0.3 mg/m3 significantly decreased prostate and coagulating gland weights, accompanied by a reduction in thymus and adrenal gland weight. In contrast, there was a significant rise in the weights of prostate, seminal vesicles, and coagulating glands in the 3 mg/m3 DE group. In rats exposed to 0.3 or 1 mg/m3 DE, serum luteinizing hormone (LH) and testosterone increased significantly, while a rise in testicular testosterone was noted with 3 mg/m3 DE. The concentrations of follicle-stimulating hormone (FSH) and inhibin as well as the sperm head counts were not markedly altered in any treatment group. Positive staining with inhibin-alpha subunit and 3beta-hydroxysteroid dehydrogenase (3beta-HSD) were observed in Sertoli cells and Leydig cells, respectively. Immunolocalization of inhibin-alpha subunit and 3beta-HSD was not changed by exposure to DE. In conclusion, DE appears to exert greater effects on accessory glands than on testes in Fischer 344 rats, and the responsiveness of rats is less than that found in mice.
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Affiliation(s)
- N Tsukue
- Graduate School of Agriculture and Life Sciences, University of Tokyo, Japan
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10
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Kondo M, Kondo M, Udono T, Jin WZ, Jin WZ, Funakoshi M, Shimizu K, Itoh M, Herath CB, Watanabe G, Watanabe G, Groome NP, Taya K, Taya K. Secretion of inhibin A and inhibin B throughout pregnancy and the early postpartum period in chimpanzees. J Endocrinol 2001; 168:257-62. [PMID: 11182763 DOI: 10.1677/joe.0.1680257] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Plasma concentrations of inhibin A and inhibin B during pregnancy and early lactation in chimpanzees were determined by enzyme-linked immunosorbent assay (ELISA). Plasma samples were taken from five pregnant chimpanzees at 6-9, 10, 20 and 25 weeks of pregnancy, and following parturition. Throughout pregnancy and the early postpartum period, circulating inhibin A and inhibin B concentrations remained low, at similar levels to those during the normal menstrual cycle in chimpanzees. Concentrations of inhibin A in the placental homogenate were high enough to be measured by the ELISA and by bioassay, whereas circulating inhibin bioactivities in late pregnancy were too low to be measured. Plasma concentrations of FSH remained low with no significant changes throughout pregnancy and the postpartum period. Plasma concentrations of oestradiol-17beta and progesterone at 25 weeks of pregnancy were much higher than normal menstrual cycle levels. It was concluded that in chimpanzees the levels of circulating inhibin A and inhibin B remained low throughout pregnancy and the early postpartum period, and that the concentrations of bioactive dimeric inhibin did not increase towards the end of pregnancy. The suppression of circulating FSH levels during pregnancy is suggested to be controlled by steroid hormones that increased significantly in late pregnancy, and the present findings further suggest that the secretory pattern and role of inhibin during pregnancy in chimpanzees may be different from that in human and other primates.
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Affiliation(s)
- M Kondo
- Novartis Animal Health, Tokyo 105-6134, Japan
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11
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Abstract
Inhibin secretion in the adult female duck was investigated. The bovine inhibin radioimmunoassay (RIA) system and human enzyme-linked immunosorbent assay (ELISA) of inhibin A and inhibin B were first validated for use in the duck. In both RIA and ELISA, the dilution curves of plasma and homogenate of the first largest follicle (F1) were parallel to each standard curve, indicating that plasma and the F1 follicle contained immunoreactive (ir) and dimeric inhibins. Short-term food deprivation caused follicular atresia in the ovary and significantly depressed the plasma concentration of ir-inhibin. Positive immunostaining for inhibin alpha-, betaA-, and betaB-subunits was clearly detected in the granulosa cells of the four largest preovulatory follicles. Immunolocalization of these three inhibin subunits was also weakly seen in the interna theca cells of these follicles. These results demonstrate that inhibin alpha-, betaA-, and betaB-subunit proteins are colocalized in the granulosa cell and theca cell of the four largest preovulatory follicles in the duck ovary. The present results, therefore, indicate that the four largest follicles in the ovary are the main source of circulating inhibin in the female duck.
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Affiliation(s)
- P X Yang
- College of Animal Sciences, Zhejiang University, 310029, China
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12
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Meng W, Jin WZ. [Structure determination of new antifungal antibiotics, polaramycins A and B]. Yao Xue Xue Bao 1997; 32:352-6. [PMID: 11498870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
Antifungal antibiotics, polaramycins A and B have been isolated from the culture of Streptomyces hygroscopicus LP-93. Polaramycins A and B are 36-membered polyol macrolide antibiotics containing hemiacetal monoester of malonic acid and guanidyl groups. Based on spectral evidence including UV, IR, FABMS, 1HNMR, 13CNMR, DEPT, 1H-1H COSY, HETCOR, HMBC, the structure of polaramycins A and B have been assigned as shown in Fig 1 (A, R = H; B, R = CH3).
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Affiliation(s)
- W Meng
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050
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13
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Abstract
The 1H and 13C NMR spectra of validamycin A have been assigned by use of 2D homonuclear correlation spectroscopy for protons, and off-resonance decoupling, single frequency off-resonance decoupling, and comparison studies with model compounds for carbons. Effects of pH on carbon chemical shifts have also been studied.
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14
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Jin WZ, Yu JZ, Feng GZ. [Interphalangeal and metacarpophalangeal prosthetic replacement: report of 25 cases]. Zhonghua Wai Ke Za Zhi 1985; 23:336-7, 381. [PMID: 4053844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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15
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Jin WZ, Zhou CM, Zhang KJ. [Effect of nicotinamide on atrioventricular conduction in rabbits]. Zhongguo Yao Li Xue Bao 1984; 5:177-81. [PMID: 6239509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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