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Role of sperm surface proteins in reproduction
Jonáková, Věra ; Postlerová, Pavla ; Tichá, M. ; Pěknicová, Jana
Seminal plasma proteins bind to the sperm surface at ejaculation and may modulate sperm properties during reproduction. DQH sperm surface protein shows affinity to oviductal epithelium and zona pellucida (ZP) glycoproteins. The mRNA transcript of DQH protein was found in seminal vesicles (SV). DQH was immunodetected by monoclonal antibodies (MAbs) in SV extract and fluid, on SV tissue sections and on the membrane-associated acrosome part of ejaculated spermatozoa. These results confirmed the ability of DQH protein to bind to the sperm surface at ejaculation and to participate in the formation of the sperm reservoir in the porcine oviduct. Moreover, monoclonal antibodies reduced binding of sperm to oocytes and proved the role of DQH protein in the sperm-ZP primary binding.
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Effect of endocrine disruptors on mammalian fertility
Pěknicová, Jana ; Nováková, Vendula ; Buckiová, Daniela ; Boubelík, Michael ; Elzeinová, Fatima ; Kubátová, Alena
Endocrine system is one of the most important regulatory systems in the mammalian body. The endocrine disruptors (ED) can disrupt the function of the endocrine system but their activity is not a result of the physiological regulation. The effect of low dose of selected ED, bisphenol-A (BPA), p-nonylphenol (NP), diethylstilbestrol (DES), genistein (GEN), resveratrol (RES)), hormone (17α-ethynylestradiol (EE2)) and polybrominated compound (tetrabromobisphenol A (TBBPA)) within development of reproductive tract in outbred CD1 mice was tested. BPA and NP had a negative effect on reproductive organs morphology and mouse spermatozoa. The fertility of mice exposed to DES was disrupted. Contrary to that, treatment by GEN and RES had no effect on the fertility of mice but had some effect on their reproductive parameters except for sperm integrity. Synthetic hormone (EE2) and polybrominated compound (TBBPA) also affected on the organ weight, reproductive parameters and sperm quality.
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