Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Genome-wide 5-hydroxymethylcytosine patterns in human spermatogenesis are associated with semen quality. / Efimova, Olga A.; Pendina, Anna A.; Tikhonov, Andrei V.; Parfenyev, Sergey E.; Mekina, Irina D.; Komarova, Evgeniia M.; Mazilina, Mariia A.; Daev, Eugene V.; Chiryaeva, Olga G.; Galembo, Ilona A.; Krapivin, Mikhail I.; Glotov, Oleg S.; Stepanova, Irina S.; Shlykova, Svetlana A.; Kogan, Igor Yu; Gzgzyan, Alexander M.; Kuznetzova, Tatyana V.; Baranov, Vladislav S.
в: Oncotarget, Том 8, № 51, 01.01.2017, стр. 88294-88307.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Genome-wide 5-hydroxymethylcytosine patterns in human spermatogenesis are associated with semen quality
AU - Efimova, Olga A.
AU - Pendina, Anna A.
AU - Tikhonov, Andrei V.
AU - Parfenyev, Sergey E.
AU - Mekina, Irina D.
AU - Komarova, Evgeniia M.
AU - Mazilina, Mariia A.
AU - Daev, Eugene V.
AU - Chiryaeva, Olga G.
AU - Galembo, Ilona A.
AU - Krapivin, Mikhail I.
AU - Glotov, Oleg S.
AU - Stepanova, Irina S.
AU - Shlykova, Svetlana A.
AU - Kogan, Igor Yu
AU - Gzgzyan, Alexander M.
AU - Kuznetzova, Tatyana V.
AU - Baranov, Vladislav S.
PY - 2017/1/1
Y1 - 2017/1/1
N2 - We performed immunofluorescent analysis of DNA hydroxymethylation and methylation in human testicular spermatogenic cells from azoospermic patients and ejaculated spermatozoa from sperm donors and patients from infertile couples. In contrast to methylation which was present throughout spermatogenesis, hydroxymethylation was either high or almost undetectable in both spermatogenic cells and ejaculated spermatozoa. On testicular cytogenetic preparations, 5-hydroxymethylcytosine was undetectable in mitotic and meiotic chromosomes, and was present exclusively in interphase spermatogonia Ad and in a minor spermatid population. The proportions of hydroxymethylated and non-hydroxymethylated diploid and haploid nuclei were similar among samples, suggesting that the observed alterations of 5-hydroxymethylcytosine patterns in differentiating spermatogenic cells are programmed. In ejaculates, a few spermatozoa had high 5-hydroxymethylcytosine level, while in the other ones hydroxymethylation was almost undetectable. The percentage of highly hydroxymethylated (5-hydroxymethylcytosine-positive) spermatozoa varied strongly among individuals. In patients from infertile couples, it was higher than in sperm donors (P < 0.0001) and varied in a wider range: 0.12-21.24% versus 0.02-0.46%. The percentage of highly hydroxymethylated spermatozoa correlated strongly negatively with the indicators of good semen quality - normal morphology (r=-0.567, P < 0.0001) and normal head morphology (r=-0.609, P < 0.0001) - and strongly positively with the indicator of poor semen quality: sperm DNA fragmentation (r=0.46, P=0.001). Thus, the immunocytochemically detected increase of 5hmC in individual spermatozoa is associated with infertility in a couple and with deterioration of sperm parameters. We hypothesize that this increase is not programmed, but represents an induced abnormality and, therefore, it can be potentially used as a novel indicator of semen quality.
AB - We performed immunofluorescent analysis of DNA hydroxymethylation and methylation in human testicular spermatogenic cells from azoospermic patients and ejaculated spermatozoa from sperm donors and patients from infertile couples. In contrast to methylation which was present throughout spermatogenesis, hydroxymethylation was either high or almost undetectable in both spermatogenic cells and ejaculated spermatozoa. On testicular cytogenetic preparations, 5-hydroxymethylcytosine was undetectable in mitotic and meiotic chromosomes, and was present exclusively in interphase spermatogonia Ad and in a minor spermatid population. The proportions of hydroxymethylated and non-hydroxymethylated diploid and haploid nuclei were similar among samples, suggesting that the observed alterations of 5-hydroxymethylcytosine patterns in differentiating spermatogenic cells are programmed. In ejaculates, a few spermatozoa had high 5-hydroxymethylcytosine level, while in the other ones hydroxymethylation was almost undetectable. The percentage of highly hydroxymethylated (5-hydroxymethylcytosine-positive) spermatozoa varied strongly among individuals. In patients from infertile couples, it was higher than in sperm donors (P < 0.0001) and varied in a wider range: 0.12-21.24% versus 0.02-0.46%. The percentage of highly hydroxymethylated spermatozoa correlated strongly negatively with the indicators of good semen quality - normal morphology (r=-0.567, P < 0.0001) and normal head morphology (r=-0.609, P < 0.0001) - and strongly positively with the indicator of poor semen quality: sperm DNA fragmentation (r=0.46, P=0.001). Thus, the immunocytochemically detected increase of 5hmC in individual spermatozoa is associated with infertility in a couple and with deterioration of sperm parameters. We hypothesize that this increase is not programmed, but represents an induced abnormality and, therefore, it can be potentially used as a novel indicator of semen quality.
KW - 5-hydroxymethylcytosine
KW - Human spermatogenesis
KW - Pathology Section
KW - Semen quality
KW - Sperm DNA fragmentation
KW - Testicular spermatogenic cells
UR - http://www.scopus.com/inward/record.url?scp=85031929026&partnerID=8YFLogxK
U2 - 10.18632/oncotarget.18331
DO - 10.18632/oncotarget.18331
M3 - Article
AN - SCOPUS:85031929026
VL - 8
SP - 88294
EP - 88307
JO - Oncotarget
JF - Oncotarget
SN - 1949-2553
IS - 51
ER -
ID: 40961881