Abstract
A transformed spermatogenic cell line GC-2spd(ts), recently reported to express a protein marker of spermiogenesis, was tested for the presence of several mRNAs encoded by genes transcribed specifically in the testis and at precise stages of spermatogenesis. Northern blotting and reverse-transcriptase polymerase chain reaction techniques showed that mRNAs for the stage-specific marker proteins LDH-C4 (preleptotene), acrosin (premeiotic), protamine-2 (postmeiotic), and SP-10 (postmeiotic round spermatid stage) were not detected in GC-2spd(ts) cells. Flow cytometric analysis of GC-2spd(ts) failed to detect a peak indicative of the presence of haploid chromosomes. Furthermore, the HS-63 monoclonal antibody, employed in an earlier report to demonstrate putative proacrosomal granules, failed to recognize the SP-10 protein in extracts of human or mouse sperm or in GC-2spd(ts) cells and instead recognized proteins of different masses. In view of interest in this line as a model for analyzing molecular events of spermatogenesis, this refinement of the GC-2spd(ts) phenotype may aid others considering these cells for studies of terminal stages of sperm differentiation.
Publication types
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Comparative Study
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Research Support, Non-U.S. Gov't
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Research Support, U.S. Gov't, P.H.S.
MeSH terms
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Acrosin / analysis
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Acrosin / genetics
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Acrosome*
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Animals
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Antigens*
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Antigens, Differentiation / analysis*
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Antigens, Differentiation / genetics
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Antigens, Differentiation / immunology
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Antigens, Surface / analysis
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Antigens, Surface / genetics
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Blotting, Northern
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Cell Differentiation / genetics
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Cell Differentiation / immunology
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Cell Differentiation / physiology
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Cell Line, Transformed
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Electrophoresis, Polyacrylamide Gel
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Flow Cytometry
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Gonadal Steroid Hormones*
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Humans
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Immunoblotting
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Isoenzymes
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L-Lactate Dehydrogenase / analysis
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L-Lactate Dehydrogenase / genetics
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Male
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Membrane Proteins
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Mice
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Phenotype
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Polymerase Chain Reaction
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Protamines / analysis
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Protamines / genetics
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Proteins / analysis
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Proteins / genetics
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RNA / analysis
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RNA / genetics
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Spermatocytes / cytology*
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Spermatocytes / physiology
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Spermatogenesis / physiology*
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Temperature
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Time Factors
Substances
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ACRV1 protein, human
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Acrv1 protein, mouse
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Antigens
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Antigens, Differentiation
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Antigens, Surface
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Gonadal Steroid Hormones
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Isoenzymes
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Membrane Proteins
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Protamines
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Proteins
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protamine 2
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RNA
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L-Lactate Dehydrogenase
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Acrosin