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Behaviour of the germ cell specific lamin through mammalian spermatogenesis as probed with monoclonal antibodies

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dc.contributor.author Manjula, K
dc.contributor.author Karande, Anjali
dc.contributor.author Rao, M R S
dc.date.accessioned 2012-02-23T09:41:19Z
dc.date.available 2012-02-23T09:41:19Z
dc.date.issued 1994-08
dc.identifier 1347-3700 en_US
dc.identifier.citation Cell Structure and Function 19(4), 207-218 (1994) en_US
dc.identifier.uri https://libjncir.jncasr.ac.in/xmlui/10572/495
dc.description Open Access en_US
dc.description.abstract We had earlier identified a 60 kDa nuclear lamin protein (laming unique to the germ cells of rat testis which was subsequently shown to be antigenically conserved in germ cells of grasshopper, rooster, frog and plants. Wehave now obtained eight monoclonal antibodies in mouse against this lamin? antigen. While all the eight Mabs reacted with laming antigen in an immunoblot analysis, only three Mabs (AnCi, A\\D^ C\F-j) showed strong reactivity in the immunofluorescence analysis of the germ cells. The Mabs A\\Cn and A11D4 showed a slight cross-reactivity with rat liver lamin B. Indirect immunofluorescence analysis of pre-meiotic, meiotic and post-meiotic germ cells with Mabs have shown that while the lamin? is localized in the lamina structures of spermatogonia and round spermatids, it is localized to the phase dense regions of pachytene spermatocytes which is in conformity with our previous observations using rabbit polyclonal antibodies. The localization of the antigen in the germ cells was also confirmed by immunohistochemical staining of the thin sections of seminiferous tubules. By immunostaining the surface spread pachytene spermatocytes, the antigen was further localized to the telomeric ends of the paired homologous chromosomes. Using anti-somatic lamin B antibodies, we have also demonstrated the absence of somatic lamins in meiotic and post-meiotic germ cells. The lamina structure of pre-meiotic spermatogonial nucleus contains both somatic lamin B and lamin? as evidenced by immunofluorescence studies with two differently fluorochrome labelled anti-lamin B and anti-lamin? antibodies. The selective retention of lamin? in the pachytene spermatocytes is probably earlier identified a 60 kDa nuclear lamin protein (laming unique to the germ cells of rat testis which was subsequently shown to be antigenically conserved in germ cells of grasshopper, rooster, frog and plants. Wehave now obtained eight monoclonal antibodies in mouse against this lamin? antigen. While all the eight Mabs reacted with laming antigen in an immunoblot analysis, only three Mabs (AnCi, A\\D^ C\F-j) showed strong reactivity in the immunofluorescence analysis of the germ cells. The Mabs A\\Cn and A11D4 showed a slight cross-reactivity with rat liver lamin B. Indirect immunofluorescence analysis of pre-meiotic, meiotic and post-meiotic germ cells with Mabs have shown that while the lamin? is localized in the lamina structures of spermatogonia and round spermatids, it is localized to the phase dense regions of pachytene spermatocytes which is in conformity with our previous observations using rabbit polyclonal antibodies. The localization of the antigen in the germ cells was also confirmed by immunohistochemical staining of the thin sections of seminiferous tubules. By immunostaining the surface spread pachytene spermatocytes, the antigen was further localized to the telomeric ends of the paired homologous chromosomes. Using anti-somatic lamin B antibodies, we have also demonstrated the absence of somatic lamins in meiotic and post-meiotic germ cells. The lamina structure of pre-meiotic spermatogonial nucleus contains both somatic lamin B and lamin? as evidenced by immunofluorescence studies with two differently fluorochrome labelled anti-lamin B and anti-lamin? antibodies. The selective retention of lamin? in the pachytene spermatocytes is probably earlier identified a 60 kDa nuclear lamin protein (laming unique to the germ cells of rat testis which was subsequently shown to be antigenically conserved in germ cells of grasshopper, rooster, frog and plants. Wehave now obtained eight monoclonal antibodies in mouse against this lamin? antigen. While all the eight Mabs reacted with laming antigen in an immunoblot analysis, only three Mabs (AnCi, A\\D^ C\F-j) showed strong reactivity in the immunofluorescence analysis of the germ cells. The Mabs A\\Cn and A11D4 showed a slight cross-reactivity with rat liver lamin B. Indirect immunofluorescence analysis of pre-meiotic, meiotic and post-meiotic germ cells with Mabs have shown that while the lamin? is localized in the lamina structures of spermatogonia and round spermatids, it is localized to the phase dense regions of pachytene spermatocytes which is in conformity with our previous observations using rabbit polyclonal antibodies. The localization of the antigen in the germ cells was also confirmed by immunohistochemical staining of the thin sections of seminiferous tubules. By immunostaining the surface spread pachytene spermatocytes, the antigen was further localized to the telomeric ends of the paired homologous chromosomes. Using anti-somatic lamin B antibodies, we have also demonstrated the absence of somatic lamins in meiotic and post-meiotic germ cells. The lamina structure of pre-meiotic spermatogonial nucleus contains both somatic lamin B and lamin? as evidenced by immunofluorescence studies with two differently fluorochrome labelled anti-lamin B and anti-lamin? antibodies. The selective retention of lamin? in the pachytene spermatocytes is probably B and anti-lamin? antibodies. The selective retention of lamin? in the pachytene spermatocytes is probably essential for anchoring the telomeric selective retention of lamin? in the pachytene spermatocytes is probably essential for anchoring the telomeric ends of the paired chromosomesto the inner nuclear membrane. en_US
dc.description.uri http://www.journalarchive.jst.go.jp/english/jnlabstract_en.php?cdjournal=csf1975&cdvol=19&noissue=4&startpage=207 en_US
dc.language.iso en en_US
dc.publisher Japan Society for Cell Biology en_US
dc.rights © 1994 Japan Society for Cell Biology en_US
dc.subject Germcell Specific Lamin en_US
dc.subject spermatogenesis en_US
dc.title Behaviour of the germ cell specific lamin through mammalian spermatogenesis as probed with monoclonal antibodies en_US
dc.type Article en_US


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