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Objective To investigate the role of zinc in reducing the deleterious effects of cadmium on male gonads. Methods Rats were injected subcutaneously with CdCl
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Objective To establish a rapid SNP( single-nucleotide polymorphism) genetic identification method for the frozen samples, such as frozen embryos and sperm of inbred mice.Methods In this study, the frozen embryos and sperm of inbred mice were provided by Shanghai Lab.Animal Research Center.Whole genome amplification and PCR-LDR genotyping system were used to get the rich DNA sample.Forty-five SNP were genotyped by multiple polymerase chain re-action and ligase detection reaction( PCR-LDR) .Results The electrophoresis results showed that the whole genome am-plification technique could highly increase the total DNA of frozen embryos.PCR-LDR typing method was suitable for the mouse genome typing of 45 SNPs.Ten strains of inbred frozen embryos and sperms of C57BL/6, BALB/c, FVB/NJ mice were genotyping identified, and their SNP loci data obtained by PCR-LDR were as the same as those of database.The num-ber of frozen mouse embryos was proportional to the number of SNPs detected, and when the embryo number reached more than 12, the detection rate of SNP was 100%.Conclusions This method can be used to the genetic quality identification, and rapidly identify the inbreed frozen mouse embryos and sperms.
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Objective To study the protective effect of phenethyl alcohol glycosides extracted from Herba Cistan-chis on human sperm DNA with oxidative damage by Raman spectroscopy. Methods The human sperm model of oxidative damage was induced with Fenton’s reagent in vitro. After co-cultured with the phenethyl alcohol gly-cosides extracted from Herba Cistanchis ( in the dosage of 0.1, 0.01 and 0.001 μg/mL) , the changes of the sperm nuclear DNA were observed by using confocal micro-Raman spectroscopy. Results The intensity and peaks of the Raman spectra of the human sperm nuclei treated by Fenton’s reagent were changed significantly, and then the changes of intensity and peaks were inhibited after treatment with phenethyl alcohol glycosides of Herba Cistanchis, the inhibition being dose-dependent. Conclusion The phenylethyl alcohol glycosides ex-tracted from Herba Cistanchis have protective effect on human sperm DNA with oxidative damage.
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Objective To study the adverse effect of omethoate on DNA in mouse sperm cells in vivo. Single cell gel electrophoresiss (SCGE) or comet assay was used to observe the damage of DNA. Methods 40 male kunming mice were randomly divided into 4 groups and were treated with omethoate by gavage at 0 mg/kg, 0.5 mg/kg, 1 mg/kg and 2 mg/kg respectively, once a day for 35 consecutive days. Results The movement and density of sperms decreased as the dose of omethoate increased, the length of comet tails in group of 1 mg/kg and group of 2 mg/kg was much longer than that in the control, the other indexes of comet assay also showed significant DNA damage. Conclusion Omethoate exposure can induce DNA damage in the sperm cells of male mice.
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【Objective】To observe the effect of electroacupuncture(EA) on sperm count and quality in oligoasthenozoospermic rats.【Methods】Twenty-four male SD rats were given adenine by intragastral administration to establish oligoasthenozoospermic models.After the modeling,the survival rats were randomized into EA group(N=8) and model group(N=8).EA group was treated with EA of Guanyuan(CV4),Shenshu(BL23) and Sanyinjiao(SP6) acupoints.Other 10 rats served as the normal controls.Sperm samples were analyzed by computer-aided semen analysis system(CASA) and the observed sperm parameters included sperm concentration,semen viability and percentage of forward progressive sperm.【Results】Compared with the normal group,sperm concentration,semen viability and percentage of forward progressive sperm were much decreased in the model group(P
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Objective To observe the clinical effect of Renzi Shengjing Decoction(Radix Ginseng and Fructus Schisandrae decoction for producing sperms)treating oligospermia and aspermia males with kidney yang deficiency through its influence on semen and hormones.Methods The 60 males with infertility due to oligospermia and aspermia were randomly divided into treated group and control group with 30 cases in each.Before and after treatment,the two groups were tested with the colored semen analysis system for detecting the density,motility and survival rate of sperms respectively.The follicle-stimulating hormone(FSH),luteinizing hormone(LH),testosterone(T),and prolactin(PRL)were measured by enzyme-labeling instrument.Results In the treated group,the improvement of semen parameters and sexual hormones and clinical effect were better than those of control group(P
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Motility is used as a routine parameter for assessing spermatozoa activity. The quality rating techniques adopted are based on electron or optical microscopy. However, these methods depend on gross structural and dynamical features of sperm cells and do not provide information on metabolic activity of intact cells. Lately, biochemical assays have become popular. Such methods are cumbersome and destroy the samples. Magnetic resonance methods offer a non-invasive method for studies on intact sperms. We have investigated respiration, maturation and in vitro capacitation of sperms from human ejaculates and sperms extracted from goat reproductive organ using electron spin resonance spin labelling and [31P] nuclear magnetic resonance methods. These studies clearly establish the advantages of magnetic resonance in studies related to metabolic activity of sperms.
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Rabbit antisera against mouse LDH-C_4 were generated by immunization of rabbits with highly purified mouse lactate dehydrogenase C_4. Immunofluorescent localization of LDH-C_4 on mouse and human sperms was performed by rabbit antibodies against mouse LDH-C_4 at 1:20 dilution of antisera. Sheep anti-rabbit IgGFITC conjugates at dilution of 1:10 was used as second antibody for the detection. Human sperms were obtained from fresh semen of fertile males. Mouse sperms were prepared from epididymis fluid of mature mice. Both human and mouse sperms were thoroughly washed by PBS buffer. Sections of 4 ?m mouse testes were made and dried on the slides for the immunohistochemical localization, ?-hydroxy-n-valeric acid was used as specific substrate in incubation medium for revealing the LDH-C_4 activity. Immunofluorescent studies demonstrated that LDH-C_4 can be found on the surface of mouse and human spermatozoa. In human spermatozoa, the strong fluorescence was seen on the neck and midpiece. On mouse sperm, the antibody binding was directed toward the tail segment with little or no binding on the head or midpiece. Histochemical studies showed that the intensive formazen deposits were on the neck and midpiece of human and mouse spermatozoa, as well as the cells approximate to the lumen of mouse seminiferous tubules.