Cumulus Oophorus-associated Glycodelin-C Displaces Sperm-bound Glycodelin-A and -F and Stimulates Spermatozoa-Zona Pellucida Binding

Chiu, Philip C.N.; Chung, Man-Kin; Koistinen, Hannu; Koistinen, Hannu; Seppälä, Markku; Ho, Pak‐Chung; Ng, Ernest H.Y.; Lee, Ckf; Yeung, William S.B.

doi:10.1074/jbc.m607482200

Cited by 51 publications

(55 citation statements)

References 70 publications

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“…Thus, it was suggested that glycodelin F could help to prevent a premature acrosome reaction, before the human spermatozoa contact the zona pellucida (ZP; Yeung et al 2007). Glycodelin C, generated from glycodelins A and F in oocyte cumulus cells, has been shown to bind to sperm head, mainly in the equatorial region (Chiu et al 2007b).…”

Section: Glycodelinsmentioning

confidence: 99%

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Oviductal secretion and gamete interaction

Ghersevich¹,

Massa²,

Zumoffen³

2015

Reproduction

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Experimental evidence from the last 30 years supports the fact that the oviduct is involved in the modulation of the reproductive process in eutherian mammals. Oviductal secretion contains molecules that contribute to regulation of gamete function, gamete interaction, and the early stages of embryo development. The oviductal environment would act as a sperm reservoir, maintaining sperm viability, and modulating the subpopulation of spermatozoa that initiates the capacitation process. It could also contribute to prevent the premature acrosome reaction and to reduce polyspermy. Many studies have reported the beneficial effects of the oviductal environment on fertilization and on the first stages of embryo development. Some oviductal factors have been identified in different mammalian species. The effects of oviductal secretion on the reproductive process could be thought to result from the dynamic combined action (inhibitory or stimulatory) of multiple factors present in the oviductal lumen at different stages of the ovulatory cycle and in the presence of gametes or embryos. It could be hypothesized that the absence of a given molecule would not affect fertility as its action could be compensated by another factor with similar functions. However, any alteration in this balance could affect certain events of the reproductive process and could perhaps impair fertility. Thus, the complexity of the reproductive process warrants a continuous research effort to unveil the mechanisms and factors behind its regulation in the oviductal microenvironment.

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Section: Glycodelinsmentioning

confidence: 99%

“…Glycodelin C would remove the previously attached glycodelins A and F from spermatozoa, enhancing the zona-binding capacity of sperm passing through the cumulus oophorus (Chiu et al 2007b).…”

Section: R6 S Ghersevich and Othersmentioning

confidence: 99%

Oviductal secretion and gamete interaction

Ghersevich¹,

Massa²,

Zumoffen³

2015

Reproduction

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“…Hemizona binding assay was used to study the binding capability of spermatozoa to ZP as described (Chiu et al, 2007). Unfertilized human oocytes from our intracytoplasmic sperm injection program were micro-bisected into two identical hemizonae.…”

Section: Determination Of Sperm-zp Binding Capabilitymentioning

confidence: 99%

An in vitro study of the effect of mifepristone and ulipristal acetate on human sperm functions

Huang

et al. 2014

Andrology

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SUMMARYUlipristal acetate (UPA) and mifepristone are currently well-established agents for emergency contraception. Both drugs are selective progestogen receptor modulators which have been shown to have better efficacy than the widely used levonorgestrel in prevention of pregnancy. However, there is only limited information on the action of UPA on sperm function. The present study compared the in vitro biological effects of mifepristone and UPA on human sperm functions. Spermatozoa from semen samples with normal semen parameters were isolated. Capacitated spermatozoa were pre-incubated with 0.04, 0.4, 4 and 40 lM mifepristone or UPA for 1 h. Sperm motility, viability, DNA integrity, capacitation, spontaneous acrosome reaction, spontaneous hyperactivation, zona pellucida (ZP) binding capability and intracellular calcium concentration ([Ca 2+ ] i ) were determined. The effects of mifepristone and UPA on progesterone-induced acrosome reaction, hyperactivation and [Ca 2+ ] i were also studied. Our results showed that mifepristone and UPA dose-dependently suppressed progesterone-induced acrosome reaction, hyperactivation and [Ca 2+ ] i at concentrations ≥0.4 lM in human spermatozoa. Both compounds did not affect sperm motility, viability, DNA integrity, capacitation, spontaneous acrosome reaction, spontaneous hyperactivation, ZP binding capability and [Ca 2+ ] i . This study demonstrated that UPA and mifepristone modulate human sperm functions by acting as progesterone antagonists. The results enable us to gain a better understanding of the mechanisms by which mifepristone and UPA work for emergency contraception, and provide a scientific basis for their clinical application.

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“…Several Gd isoforms with differences in glycosylation have been described: Gd-A (endometrium/decidua, amniotic fluid, and maternal serum) (Julkunen et al 1985;Dell et al 1995;Koistinen et al 2003), Gd-S (seminal vesicles and seminal plasma) (Morris et al 1996), Gd-F (follicular fluid and oviduct) (Tse et al 2002), and Gd-C (cumulus oophorus) (Chiu et al 2007).…”

mentioning

confidence: 99%

Glycodelin Protein and mRNA Is Downregulated in Human First Trimester Abortion and Partially Upregulated in Mole Pregnancy

Tóth

Roth

Kunert‐Keil

et al. 2008

J Histochem Cytochem.

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(CK-K) S U M M A R Y Glycodelin (Gd) is a major reproductive glycoprotein and a mediator for immunomodulatory effects directed to cellular, humoral, and innate immunity. Human pregnancy depends on a diversity of physiological processes including modulation of the maternal immunosystem. We evaluated the expression of Gd protein and mRNA in first trimester decidual tissue of normal pregnancies and spontaneous abortion and hydatidiform moles. Furthermore, in vitro experiments on endometrial cancer cells to analyze the effect of human chorionic gonadotropin (hCG) on Gd regulation were performed. In decidual tissue of abortion patients, Gd expression was significantly decreased compared with normal gestation, which was confirmed by in situ hybridization. In mole pregnancy, an upregulation of Gd in the first 8 weeks of pregnancy was present. Gd is a main product of decidual tissue in the first trimester of human pregnancy. Reduced Gd expression in abortive pregnancy could lead to an increased activation of the maternal immunosystem, thus causing rejection of the developing fetus. Moreover, Gd expression in endometrial cancer cells in vitro could be stimulated by addition of hCG. Therefore, we speculate that hCG could be one of the factors regulating Gd expression because hCG is downregulated in women with abortion and upregulated in mole pregnancy. In addition, we found a positive feedback loop in Gd and hCG expression in human pregnancy. (J Histochem Cytochem 56:477-485, 2008)

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Cumulus Oophorus-associated Glycodelin-C Displaces Sperm-bound Glycodelin-A and -F and Stimulates Spermatozoa-Zona Pellucida Binding

Cited by 51 publications

References 70 publications

Oviductal secretion and gamete interaction

Oviductal secretion and gamete interaction

An in vitro study of the effect of mifepristone and ulipristal acetate on human sperm functions

Glycodelin Protein and mRNA Is Downregulated in Human First Trimester Abortion and Partially Upregulated in Mole Pregnancy

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