Objective To investigate whether γH2AX could be a useful biomarker for evaluating the DNA double‐stranded . Methods Semem samples in case group were from 27 infertile males who were diagnosed in Andriatrics department or reproductive centre in the First Affiliated Hospital of Guangxi Medical University .The other semen samples were from 23 healthy donors with fertility as comparison .The levels of γH2AX were detected by flow cytometry .Single cell gel electropherosis(SCGE)was applied to assess the level of DSBs of sperm .Density gradient centrifugation(DGC) was applied to optimized spermatozoa .Results TheγH2AX levels and the DSBs of the sperm of the infertile subjects were significantly higher than those of healthy males(P<0 .01) , and the levels of γH2AX and the DSBs of sperm significantly decreased in two groups by DGC(P<0 .01) .Conclusion The level of spermatozoaγH2AX is higher in male infertility patients than in healthy donors with fertility ,which might be a useful biomarker for evaluating DSBs of sperm .

Objective To investigate the effect of abnormality Y chromosome and sperm quality on the clinical result of insisted reproductive technique (ART). Methods We retrospectively analyzed the effect of ab-normality Y chromosome and sperm quality on embryo quality/result of pregnancy of patients undergoing ART. In-fertile men with normality Y chromosome (n=436) and with abnormality Y chromosome (n =146) from Jan 2010 to Dec 2010 were enrolled in this study. The infertile men were divided into four groups: the normality Y chromo-some plus teratozoospermia group , the normality Y chromosome plus normal sperm quality group , the abnormality Y chromosome plus teratozoospermia group, the abnormality Y chromosome plus normal sperm quality group. Embryo quality and the results of clinic pregnancy outcome were analyzed among the four groups. Results Fertilization rate of the four groups was 73.4%, 69.0%, 70.9% and 68%, respectively (P < 0.05). No significant differences were found in thecleavage rate, optimal embryo rate and pregnancy outcome among the four groups. Conclusions Both abnormality Y chromosome length and teratozoospermia may be affect the fertility rate of the infertile men undergoing IVF/ICSI.

Objective Investigation of the carrier rate, genotyping and genotype frequency of alpha-thalassemia among infertile subjects in Guangxi, and analysis of the relationship between the results of hemoglobin electrophoresis and hematologic parameters among patients with three phenotypes of alpha-thalassemia and subjects with non-thalassemia. Methods The preliminarily patients who were diagnosed as beta-thalassemia via HbA2>3.5％ and/or HbF> 2％ were excluded. Alpha-thalassemia genes of 10 020 infertile subjects were detected in our center from 2017 to 2018, and the results of hemoglobin electrophoresis and hematologic parameters in patients with three phenotypes of alpha-thalassemia were compared. Results 624 patients with alpha-thalassemia were confirmed via gene diagnostic technique, including 19 genotypes, total carrier rate for 6.23％, 275 (2.74％) patients with silent alpha-thalassemia, 326 (3.25％) patients with alpha-thalassemia trait and 23 (0.23％) patients with HbH disease. The most common genotype was--SEA/αα, followed by-α3.7/αα and α, CSα/αα. The parameters of MCV, MCH, MCHC, Hb, HCT, HbA2 were lower, but the value of RBC were higher (both P < 0.05) , in patients with three phenotypes of alpha-thalassemia than subjects with non-thalassemia. The parameters mentioned above excluding HbA2 in patients with alpha-thalassemia showed the following regularity : silent alpha-thalassemia> potential alpha-thalassemia> HbH disease. RBC value tended to increase gradually in patients with silent alpha-thalassemia, potential alpha-thalassemia and HbH disease. Conclusion Infertility with alpha-thalassemia is very popular in Guangxi, especially--SEA/αα which is the most common genotype. The value of MCV, MCH, MCHC, Hb, RBC and HCT are conducive to screening for infertile subjects with alpha-thalassemia, and have certain clinical value for differentiating three phenotypes of alpha-thalassemia.