Dynamic Expression and Chromatin Incorporation of ACT and CREM Transcription Factors in Testis Tissues of Infertile Men

(Pages: 736-741)
Parham Jazireian, M.Sc, 1,2Raha Favaedi, M.Sc, 2Mohammad Ali Sadighi Gilani, M.D, 3,4Maryam Shahhoseini, Ph.D, 1,2,5,*
Reproductive Epidemiology Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran
Department of Genetics, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran
Department of Andrology, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran
Department of Urology, Shariati Hospital, Tehran University of Medical Sciences, Tehran, Iran
Department of Cell and Molecular Biology, School of Biology, College of Science, University of Tehran, Tehran, Iran
Reproductive Epidemiology Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran
Department of Genetics, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran
Department of Andrology, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran
Department of Urology, Shariati Hospital, Tehran University of Medical Sciences, Tehran, Iran
Department of Cell and Molecular Biology, School of Biology, College of Science, University of Tehran, Tehran, Iran
*Corresponding Address: P.O.Box: 16635-148 Department of Genetics Reproductive Biomedicine Research Center Royan Institute for Reproductive Biomedicine ACECR Tehran Iran Email:m.shahhoseini@royaninstitute.org
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Jazireian Parham, Favaedi Raha, Sadighi Gilani Mohammad Ali, Shahhoseini Maryam. Dynamic Expression and Chromatin Incorporation of ACT and CREM Transcription Factors in Testis Tissues of Infertile Men. Cell J. 2021; 23(7): 736-741.

Abstract

Objective

Activator of CREM in the testis (ACT) is a tissue specific transcription factor which activates cAMP responsive element modulator (CREM), a key transcription factor in differentiation of round spermatids into mature spermatozoa. They bind to CRE region in the promoters of transition protein genes (TNP1, TNP2) and protamine genes (PRM1 and PRM2), which are essential for sperm chromatin compaction, and regulates their transcription. This study was conducted to consider the expression of ACT and CREM and their regulatory roles on the expression of PRM1, PRM2, TNP1 and TNP2 genes in testis tissues of infertile men.

Materials and Methods

In this case-control study, testicular biopsies were collected from 40 infertile men and classified into three groups: obstructive azoospermia (OA, n=10, positive control), round spermatid maturation arrest (SMA, n=20), Sertoli cell-only syndrome (SCOS, n=10, negative control group). Using quantitative real-time polymerase chain reaction (PCR), the expression profile of ACT, CREM, TNP1, TNP2, PRM1 and PRM2 genes were assessed in testicular samples and incorporation of ACT and CREM proteins on the promoters of PRM1, PRM2, TNP1 and TNP2 genes were also evaluated by ChIP-real time PCR.

Results

Our results demonstrated significant decrease in the expression levels of ACT, CREM and in their incorporations on their target genes in SMA group in comparison to control groups (P<0.05).

Conclusion

These data confirm that there is low expression and incorporation of ACT and CREM and of their target genes in infertilities which are associated with post-meiotic arrest.