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Canine preprorelaxin: nucleic acid sequence and localization within the canine placenta
T Klonisch1, S Hombach-Klonisch, C Froehlich
1Department of Anatomy and Cell Biology, Faculty of Medicine, Martin-Luther-University Halle-Wittenberg, D-06097 Halle (Saale), Germany. thomas.klonisch@medizin.uni-halle.de
Biology of Reproduction
|February 20, 1999
Summary
Researchers identified the canine preprorelaxin sequence and found syncytiotrophoblast cells in the placenta produce relaxin. This discovery advances understanding of canine reproductive biology.
Area of Science:
- Reproductive Biology
- Molecular Endocrinology
- Comparative Genomics
Background:
- Relaxin, a hormone crucial for pregnancy, has been studied in various species.
- The precise source and localization of relaxin production in the canine placenta remained unclear.
Purpose of the Study:
- To determine the nucleic acid sequence of canine preprorelaxin.
- To identify the specific cell types within the canine placenta responsible for relaxin production.
Main Methods:
- Reverse transcription-polymerase chain reaction (RT-PCR) and rapid amplification of cDNA ends (RACE-PCR) were used to obtain the cDNA sequence.
- Northern blot analysis, in situ hybridization, and immunohistochemistry were employed to localize relaxin mRNA and protein within placental tissues.
Main Results:
- The canine preprorelaxin cDNA sequence was determined, encoding a 177-amino acid protein.
- Relaxin mRNA and protein were localized to the syncytiotrophoblast layer of the canine placenta.
- The basal cytotrophoblast layer lacked relaxin, while uterine glands were also devoid of relaxin production.
Conclusions:
- The syncytiotrophoblast is identified as the primary source of relaxin in the canine placenta.
- This finding provides critical insights into the hormonal regulation of canine pregnancy.
