國家衛生研究院 NHRI:Item 3990099045/3596
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    题名: Enzyme Activity and Immunohistochemical Localization of Dipeptidyl Peptidase 8 and 9 in Male Reproductive Tissues
    作者: Dubois, V;Van Ginneken, C;De Cock, H;Lambeir, AM;Van der Veken, P;Augustyns, K;Chen, X;Scharpe, S;De Meester, I
    贡献者: Division of Biotechnology and Pharmaceutical Research
    摘要: The mRNA expression pattern of dipeptidyl peptidase (DPP) 8 and DPP9, two DPP4 homologues, was studied before and revealed a broad tissue distribution (Abbott et al. 2000; Olsen and Wagtmann 2002; Qi et al. 2003; Ajami et al. 2004). In this study, protein expression and activity of DPP8 and DPP9 were investigated in male reproductive tissues of different mammals. Based on specific DPP activities and inhibition profiles, the proline-selective DPP activity in the bovine and rat testis could predominantly be attributed to DPP8/9 and not to DPP4. This is in contrast to the epididymis where most of the activity was due to DPP4. Bovine sperm preparations had a very low or undetectable DPP8/9 activity. After characterization of polyclonal antibodies specific for DPP8 or DPP9, we could localize both enzymes in seminiferous tubules of the testis. A specific staining for DPP9 was found associated with spermatozoids embedded in the epithelium, just before their release into the lumen, and in spermatids. DPP8 was localized in spermatozoids in an earlier stage of maturation. These findings can help to give an insight in the physiological role of DPP4-like enzymes in the male reproductive system. This manuscript contains online supplemental material at http://www.jhc.org. Please visit this article online to view these materials.
    日期: 2009-06
    關聯: Journal of Histochemistry and Cytochemistry. 2009 Jun;57(6):531-541.
    Link to: http://dx.doi.org/10.1369/jhc.2009.952739
    JIF/Ranking 2023: http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=NHRI&SrcApp=NHRI_IR&KeyISSN=0022-1554&DestApp=IC2JCR
    Cited Times(WOS): https://www.webofscience.com/wos/woscc/full-record/WOS:000266294700002
    Cited Times(Scopus): http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=67649198962
    显示于类别:[陳新(2002-2015)] 期刊論文

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