Association between the vascular endothelial growth factor gene polymorphisms and the risk of polycystic ovary syndrome in Northern Chinese women.

The present study aimed to investigate whether the single nucleotide polymorphisms (SNPs) rs2010963 and rs833061 in vascular endothelial growth factor (VEGF) gene is correlated with the risk of polycystic ovary syndrome (PCOS) in Northern Chinese women, as a preliminary study. This case-control study comprised 118 women with PCOS and 130 healthy women as controls. Genotyping of the two polymorphisms within the VEGF gene 5'-untranslated region and promoter region were performed using polymerase chain reaction ligase detection reaction method. The data showed that there was a significant difference in the genotype and allele distribution of the rs2010963 polymorphism between the PCOS group and the control group (p = .020 and .033, respectively). The women carrying the C allele (G/C + C/C genotype) had a lower risk of PCOS compared with the women with G/G genotype [odds ratio (OR = 0.55; 95% confidence interval (CI) = 0.33-0.91]. Our study shows for the first time that the rs2010963 polymorphism may be associated with a risk of PCOS in Northern Chinese women.

Surveillance and analysis of virus antibodies in conventional rabbits and guinea pigs in Guangdong Province during 2014-2016 / 中国比较医学杂志

Objective To analyze the possibilities of screening SPF rabbits and guinea pigs from conventional animals, viral antibodies of the conventional rabbits and guinea pigs bred by licensed companies in Guangdong province during 2014-2016 were determined according to the standard of SPF animals in GB14922. 2. Methods Nine batches of 167 rabbit sera and 155 guinea pig sera were sampled from 6 companies. Serum antibodies to virus were determined by ELISA according to GB14922. 2. Results Positivity of antibody to rabbit hemorrhagic disease virus (RHDV) was 82. 2%(129/157) for the vaccinated rabbits, and negative result were obtained for unvaccinated rabbits. Positive rate of rabbit rotavirus (RRV) was 42. 5% (71/167). No positive antibody responses to Sendai virus were detected out in all rabbits. The positive rates of guinea pig reovirus type III (REO-3) and pneumonia virus of mice (PVM) were 52. 9%(82/155)and 20% (31/155) respectively. Antibody responses to Sendai virus ( SV) and lymphocytic choriomeningitis virus ( LCMV) were negative in all guinea pigs. Conclusions Although the conventional rabbits and guinea pigs could meet the national standard, higher infection rates of virus excluded that SPF animals emerged in conventional animals, indicating that selection of SPF animals from conventional colonies is impracticable.

Surveillance and analysis of virus antibodies in conventional rabbits and guinea pigs in Guangdong Province during 2014-2016 / 中国比较医学杂志

Objective To analyze the possibilities of screening SPF rabbits and guinea pigs from conventional animals, viral antibodies of the conventional rabbits and guinea pigs bred by licensed companies in Guangdong province during 2014-2016 were determined according to the standard of SPF animals in GB14922. 2. Methods Nine batches of 167 rabbit sera and 155 guinea pig sera were sampled from 6 companies. Serum antibodies to virus were determined by ELISA according to GB14922. 2. Results Positivity of antibody to rabbit hemorrhagic disease virus (RHDV) was 82. 2%(129/157) for the vaccinated rabbits, and negative result were obtained for unvaccinated rabbits. Positive rate of rabbit rotavirus (RRV) was 42. 5% (71/167). No positive antibody responses to Sendai virus were detected out in all rabbits. The positive rates of guinea pig reovirus type III (REO-3) and pneumonia virus of mice (PVM) were 52. 9%(82/155)and 20% (31/155) respectively. Antibody responses to Sendai virus ( SV) and lymphocytic choriomeningitis virus ( LCMV) were negative in all guinea pigs. Conclusions Although the conventional rabbits and guinea pigs could meet the national standard, higher infection rates of virus excluded that SPF animals emerged in conventional animals, indicating that selection of SPF animals from conventional colonies is impracticable.

Effect of vitamin D on clinical and biochemical parameters in polycystic ovary syndrome women: A meta-analysis.

AIM: Using a meta-analysis framework, we investigated the association between the serum level of vitamin D and the risk of polycystic ovary syndrome (PCOS) and further examined the therapeutic effect of vitamin D on the clinical features of PCOS. MATERIAL AND METHODS: Multiple databases were searched to retrieve studies. We chose clinical studies that investigated the relation between the serum level of vitamin D and the risk of PCOS or the therapeutic effect of vitamin D on PCOS. The search results were screened according to strict inclusion and exclusion criteria to select high-quality studies for inclusion. Statistical analyses were carried out using stata 12.0. RESULTS: Seventeen studies were eligible in this meta-analysis. The levels of 25-hydroxyvitamin D and the quantitative insulin-sensitivity check index in the PCOS group were remarkably lower than in the controls, whereas the homeostasis model assessment of insulin resistance in the PCOS group was markedly higher than in the controls. No statistically significant difference was observed in serum parathyroid hormone levels between the two groups. The 25-hydroxyvitamin D levels were significantly elevated after PCOS patients received vitamin D3 treatment, but serum parathyroid hormone concentration, homeostasis model assessment of insulin resistance and quantitative insulin-sensitivity check index did not show any significant changes, indicating a lack of therapeutic response. CONCLUSION: Our results suggest that the serum level of vitamin D is associated with the risk of PCOS, but the therapeutic effect of vitamin D on PCOS remains to be further explored.

[Effects of males' age on sperm apoptosis and DNA integrity].

OBJECTIVE: To explore the correlation of males'age with sperm apoptosis, sperm DNA integrity and other seminal parameters. METHODS: We collected 104 semen samples and divided them into three groups according to the males' age: <35 yr (n = 43), 35 -39 yr (n = 31), and > or = 40 yr (n = 30). Based on the WHO Laboratory Manual (4th ed), we detected the seminal parameters, calculated the percentage of apoptotic sperm by flow cytometry (FCM), determined sperm DNA integrity by Acridine orange staining, and compared the results among the three groups. RESULTS: There were no statistically significant differences among the < 35 yr, 35 -39 yr and > or = 40 yr groups in semen volume ([2.87 +/- 0.89] ml vs [2.98 +/- 1.09] ml vs [2.65 +/- 0.95] ml), sperm concentration ([60.40 +/- 25.43] x 10(6)/ml vs [69.74 +/- 28.33] x 10(6)/ml vs [55.97 +/- 27.22] x 10(6)/ml) (P>0.05). The percentage of progressively motile sperm was significantly lower in the > or = 40 yr ([39.00 +/- 8.35 %) than in the <35 and 35 -39 yr groups ([48.73 +/- 9.89]% and [45.65 +/- 10.55]%) (P<.0.1), and so was the percentage of morphologically normal sperm in the > or = 40 yr than in the < 35 yr group ([11.11 +/- 8.26]% vs [16.43 +/- 8.75 ]%, P<0.01). The percentage of apoptotic sperm was markedly higher in the > or = 40 yr than in the <35 yr group ([11.82 +/- 5.77]% vs [7.04 +/- 3.50]%, P<0.01), while the sperm DNA integrity significantly reduced in the > or = 40 yr group ([75.52 +/- 10.60]%) as compared with the <35 yr ([86.55 +/- 5.60])% and 35 -39 yr group ( [81.39 +/- 8.94]%) (P<0.01). The males' age was correlated positively with the rate of sperm apoptosis (P<0.01), and negatively with sperm DNA integrity and the percentage of progressively motile sperm (P<0.01). CONCLUSION: The advance in males' age increases sperm apoptosis and reduces sperm progressive motility, normal morphology and DNA integrity.

[Influence of male age on the outcome of conventional IVF-ET].

OBJECTIVE: To study the influence of male age on the outcome of conventional IVF-ET. METHODS: Based on male age, 170 couples undergoing conventional IVF-ET were divided into three groups: <35 yr (n = 60), 35 -39 yr (n = 77) and > or = 40 yr (n = 33). We observed the rates of fertilization, cleavage, good quality embryo, implantation, clinical pregnancy and abortion in different groups. RESULTS: There were no significant differences among the three groups in semen volume ([3.10 +/- 1.22] ml vs [2.84 +/- 1.05] ml vs [2.80 +/- 0.79] ml), sperm concentration ([54.23 +/- 26.07] x 10(6)/ml vs [60.27 +/- 24.80] x 10(6)/ml vs [60.21 +/- 27.42] x 10(6)/ml) and sperm viability ([53.93 +/- 13.25]% vs [56.10 +/- 16.58]% vs [51.82 +/- 15.45]%) (P>0.05). The men of the > or = 40 yr group showed a significantly lower percentage of grade a + b sperm ([40.97 +/- 11.91]%) than those of the <35 and 35 - 39 yr groups ([48.47 +/- 11.78]% and [46.84 +/- 13.51]%) (P<0.05), and morphologically normal sperm ([11.76 +/- 5.97]%) than those of the <35 yr group ([15.25 +/- 6.94]% (P<0.05). The rates of fertilization, cleavage, good quality embryo, implantation, clinical pregnancy were 81.52%, 82.61%, 52.33%, 18.06% and 33.33% in the > or = 40 yr group, with no significant differences from those of the <35 yr group (83.18%, 82.68%, 56.99%, 22.40% and 40.00%) and the 35 - 39 yr group (78.78%, 80.66%, 55.01%, 21.74% and 38.96%) (P>0.05), while the abortion rate was markedly increased in the > or = 40 yr group as compared with the <35 yr group (36.36% vs 8.33%, P>0.05). CONCLUSION: Increasing male age is related with decreasing percentages of progressively motile sperm and morphologically normal sperm, but not obviously with the rates of fertilization, good quality embryo, implantation, pregnancy and abortion.