RÉSUMÉ
Objective@#To examine the associations of fibroblast growth factor 19 (FGF19), its co-receptor KLB gene and its receptor FGFR4 with susceptibility to sarcopenia, so as to provide insights into elucidation of sarcopenia pathogenesis and formulation of precision interventions for sarcopenia.@*Methods@#A case-control study was conducted. Patients with sarcopenia at ages of 60 years and older included in the Zhejiang Provincial Elderly Health Surveillance Cohorts were selected as the sarcopenia group, and normal residents at ages of 60 years and older were served as controls. Subjects' demographics were collected using questionnaire surveys, and the height, body weight, appendicular skeletal muscle mass and grip strength were measured. Genomic DNA was extracted from blood samples for multiplex PCR targeted capture. The associations between the KLB gene single-nucleotide polymorphisms (SNPs) and susceptibility to sarcopenia were evaluated using multivariable logistic regression models. @*Results@#There were 200 cases in the sarcopenia group, including 91 men and 109 women, and 180 cases in the control group, including 70 men and 110 women. All SNPs satisfied the Hardy-Weinberg equilibrium, and the minor allele frequencies were all > 0.05. There were no significant differences in the distribution of SNPs between the sarcopenia and control groups (all P>0.05). Multivariable logistic regression analysis showed that the SNP rs2687968 locus in the KLB gene was significantly associated with the susceptibility to sarcopenia among the elderly men (superdominant model), and individuals carrying the AC allele had a 2.332-fold higher risk of sarcopenia than those carrying the AA/CC allele (95%CI: 1.882-3.313). @*Conclusions@#KLB gene may correlate with the susceptibility to sarcopenia among the elderly men.
RÉSUMÉ
OBJECTIVE: The aim of this study was to analize the biologic and molecular genetic characteristics of Lactobacillus spp. isolated from vagina of Korean healthy women and to perform a pilot clinical study on the treatment of vaginitis using the best Lactobacillus strain KLB 46. METHODS: Vaginal specimens were obtained from 205 Korean women with healthy vaginal ecosystems. 155 lactobacillus strains were used for catalase test, cell surface hydrophobicity (CSH) test and antimicrobial activity test. Also we identified the species prevalence by PCR-RFLP analysis of 16S rDNA gene and performed the minimal inhibitory concentrationtest using14 antibiotics to determine their patterns of antibiotic susceptibility. A pilot clinical trial of 8 bacterial vaginosis, 1 trichomonas vaginitis and 6 atrophic vaginitis using Lactobacillus crispatus KLB 46 was done by vaginal instillation (10(10)-10(11) cells/mL). RESULTS: 155 lactobacilli strains were isolated and all isolates showed high CSH and 61% of the isolates had higher CSH. L. acidophilus and L. crispatus were the most prevalent species by PCR-RFLP analysis of their 16S rDNA gene. And PCR-RFLP analysis suggested that KLB 46 was L. crispatus. The clinical study showed that the vaginal epithelial adherence rate was high as 77% for bacterial vaginosis and 33.3% for atrophic vaginitis. CONCLUSION: The predominating lactobacilli were L. crispatus and L. acidophilus in Korean women's vaginas. Although further study would be needed, L. crispatus KLB 46 is a good candidate of suitable probiotics for bacterial vaginosis.