Absence of mitochondrial progesterone receptor polymorphisms in women with spontaneous preterm birth

Tracy A. Manuck, Thomas M. Price, Elizabeth Thom, Paul J. Meis, Mitchell P. Dombrowski, Baha Sibai, Catherine Y. Spong, Dwight J. Rouse, Jay D. Iams, Hyagriv N. Simhan, Mary J. O'Sullivan, Menachem Miodovnik, Kenneth J. Leveno, Deborah Conway, Ronald J. Wapner, Marshall Carpenter, Brian Mercer, Susan M. Ramin, John M. Thorp, Alan M. Peaceman

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


Objective: The truncated mitochondrial progesterone receptor (PR-M) is homologous to nuclear PRs with the exception of an amino terminus hydrophobic membrane localization sequence, which localizes PR-M to mitochondria. Given the matrilineal inheritance of both spontaneous preterm birth (SPTB) and the mitochondrial genome, we hypothesized that (a) PR-M is polymorphic and (b) PR-M localization sequence polymorphisms could result in variable progesterone-mitochondrial effects and variable responsiveness to progesterone prophylaxis. Methods: Secondary analysis of DNA from women enrolled in a multicenter, prospective, study of 17 alpha-hydroxyprogesterone caproate (17OHPC) versus placebo for the prevention of recurrent SPTB. DNA was extracted from stored saliva. Results: The PR-M localization sequence was sequenced on 344 patients. Sequences were compared with the previously published 48 base-pair sequence, and all were identical. Conclusions: We did not detect genetic variation in the mitochondrial localization sequence of the truncated PR-M in a group of women at high risk for SPTB.

Original languageEnglish (US)
Pages (from-to)913-916
Number of pages4
JournalReproductive Sciences
Issue number10
StatePublished - Oct 2010


  • mitochondria
  • prematurity
  • progesterone

ASJC Scopus subject areas

  • Obstetrics and Gynecology


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