Immunoreactive sites and accumulation of somatomedin-C in rat Sertoli-spermatogenic cell co-cultures.

Immunoreactive sites and accumulation of somatomedin-C in rat Sertoli-spermatogenic cell co-cultures.
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大鼠支持生精细胞共培养物中免疫反应位点和生长调节素-C 的积累。

DOI:
10.1016/0014-4827(86)90424-6
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发表时间:
1986
影响因子:
3.7
通讯作者:
Kierszenbaum,AL
Kierszenbaum,AL
中科院分区:
医学3区
文献类型:
--
作者:
Tres,LL;Smith,EP;VanWyk,JJ;Kierszenbaum,AL

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使用从性未成熟大鼠(20-22日龄)制备并维持在无血清、激素/生长因子补充培养基中的支持-生精细胞共培养物来确定生长因子生长调节素-C(SM-C)的细胞特异性定位。使用抗SM-C的单克隆抗体(sm-1.2)通过间接免疫荧光进行SM-C定位研究。在培养的大鼠肝细胞,Sertoli和睾丸管周细胞,SM-C免疫反应观察到离散的免疫荧光颗粒的弥漫性分布。用兔抗人SM-C抗体进行的放射免疫测定实验表明,原代培养的睾丸小管周细胞和支持细胞在培养基中积累了SM-C。在与睾丸支持细胞共培养的生精细胞中,SM-C免疫反应与粗线期精母细胞有关,但与精原细胞或早期减数分裂前期精母细胞(细线期或偶线期)无关。支持细胞和粗线期精母细胞都显示了外源性SM-C的结合位点。SM-C6结合到精母细胞达到成熟分裂前期的高级阶段,表明这种生长因子在成熟分裂过程中可能发挥作用。
Sertoli-spermatogenic cell co-cultures prepared from sexually immature rats (20–22 days old) and maintained in serum-free, hormone/growth factor-supplemented medium were used to determine the cell-specific localization of the growth factor somatomedin-C (SM-C). SM-C localization studies were carried out by indirect immunofluorescence using a monoclonal antibody (sm-1.2) to SM-C. In cultured rat hepatocytes, Sertoli and testicular peritubular cells, SM-C immunoreactivity was observed as a diffuse distribution of discrete immunofluorescent granules. Radio-immunoassay experiments using a rabbit antibody against human SM-C showed that testicular peritubular cells and Sertoli cells in primary culture accumulated SM-C in the medium. In spermatogenic cells co-cultured with subjacent Sertoli cells, immunoreactive SM-C was associated with pachytene spermatocytes but not with spermatogonia or early meiotic prophase spermatocytes (leptotene or zygotene). Both Sertoli cells and pachytene spermatocytes displayed binding sites for exogenously added SM-C. SM-C6 binding to spermatocytes reaching an advanced stage of meiotic prophase suggests a possible role of this growth factor in the meiotic process.
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DOI: --
发表时间: 1979
影响因子: 4.8
作者:
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发表时间: 1978
影响因子: 3.6
作者:
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DOI: 10.1111/j.1432-1033.1978.tb11991.x
发表时间: 1978
期刊: European journal of biochemistry
影响因子: --
作者:
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DOI: --
发表时间: 1980
影响因子: 5.8
作者:
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DOI: --
发表时间: 1980
期刊: Endocrinology
影响因子: 4.8
作者:
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通讯作者: R. Humbel