Licht P, von Wolff M, Berkholz A, Wildt L. Evidence for cycle-dependent expression of full-length human chorionic gonadotropin/luteinizing hormone receptor mRNA in human endometrium and decidua.
Fertil Steril 2003;
79 Suppl 1:718-23. [PMID:
12620482 DOI:
10.1016/s0015-0282(02)04822-7]
[Citation(s) in RCA: 73] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
OBJECTIVE
To investigate the expression of full-length and truncated hCG/LH-receptor mRNA in human endometrium and decidua.
DESIGN
In vitro experiment.
SETTING
Tertiary university center.
PATIENT(S)
Premenopausal women undergoing hysterectomy because of benign diseases or induced abortions.
INTERVENTION(S)
Isolation of RNA from endometrial samples, reverse transcription, selective preamplification of full-length hCG/LH receptor mRNA and several shorter fragments of the receptor gene (exons 1-11, 1-10, and 1-5), nested polymerase chain reaction with internal primers.
MAIN OUTCOME MEASURE(S)
Appropriately sized cDNA product confirmed by sequencing.
RESULT(S)
All samples derived from the proliferative as well as from the early and mid-luteal phases were positive for all four amplification products, suggesting the expression of a full-length hCG/LH receptor mRNA. Only 5 of 8 samples derived from the late secretory phase and 2 of 12 samples derived from early decidua amplified the entire receptor sequence. In contrast, the shortest fragment (exons 1-5), coding for part of the extracellular receptor domain, was amplified in all samples.
CONCLUSION(S)
The data suggest cycle-dependent regulation of hCG/LH-receptor mRNA by changes in the alternative splicing pattern and down-regulation of full-length hCG/LH receptor mRNA in early decidua. The major splicing site appears to be located between introns 5 and 9. Alternative splicing may be a mechanism regulating hCG/LH-receptor down-regulation.
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