Endocrine factors, memory and perceptual capacities and aging in Asian men

Lipid profile, random blood glucose and carotid arteries thickness in human male subjects with different ages and body mass indexes

OBJECTIVE

This article investigated the effect of age and body mass index of male humans on the carotid arteries intima media thickness (IMT) and the blood concentration of glucose, triglycerides, total cholesterol and HDL cholesterol.

METHODS

Thirty seven normal male human subjects participated in this study. The participants were classified to three groups depending on their age; 20-29 (11), 30-39 (14) and 40-49 (12). Also, the study subjects were divided to three groups according to their body mass index; normal (13), overweight (13) and obese (11). The Anova test was used for the statistical analysis of the obtained results.

RESULTS

The body mass index significantly affected the blood glucose concentration while its effect on all the other parameters was insignificant. The age significantly affected all the studied parameters except the blood glucose, triglycerides and HDL cholesterol. The total cholesterol/HDL ratio was significantly affected by the age and insignificantly by the body mass index.

CONCLUSIONS

The age was more effective on the studied parameters than the body mass index. Worsening of the lipid profile was seen in the overweight participants rather than the obese ones.

A systematic review of existing peripheral biomarkers of cognitive aging: Is there enough evidence for biomarker proxies in behavioral modification interventions?: An initiative in association with the nutrition, exercise and lifestyle team of the Canadian Consortium on Neurodegeneration in Aging

Peripheral biomarkers have shown significant value in predicting brain health and may serve as a useful proxy measurement in the assessment of evidence-based lifestyle behavior modification programs, including physical activity and nutrition programs, that aim to maintain cognitive function in late life. The aim of this systematic review was to elucidate which peripheral biomarkers are robustly associated with cognitive function among relatively healthy non-demented older adults. Following the standards for systematic reviews (PICO, PRIMSA), and employing MEDLINE and Scopus search engines, 222 articles were included in the review. Based on the review of biomarker proxies of cognitive health, it is recommended that a comprehensive biomarker panel, or biomarker signature, be developed as a clinical end point for behavior modification trials aimed at enhancing cognitive function in late life. The biomarker signature should take a multisystemic approach, including lipid, immune/inflammatory, and metabolic biomarkers in the biological signature index of cognitive health.

Inverse association of testosterone and sex hormone binding globulin levels with leukocyte count in middle-aged and elderly men

OBJECTIVE

The inverse associations of testosterone and sex hormone-binding globulin (SHBG) levels with cardiometabolic diseases are well established and are increasingly viewed as inflammatory diseases. This study aimed to examine the associations of testosterone and SHBG levels with leukocyte count in 451 Korean men aged ≥50 years.

METHODS

Serum testosterone and SHBG levels were categorized into tertiles. High leukocyte count was defined as ≥7340 cells/μl, which corresponded to the 75th percentile of the current sample. The odds ratios (ORs) and 95% confidence intervals (95% CIs) for high leukocyte count were calculated across testosterone and SHBG tertiles using multiple logistic regression analysis.

RESULTS

The mean leukocyte counts significantly decreased with increasing testosterone and SHBG tertiles. The ORs (95% CIs) of high leukocyte count for the first tertile of testosterone and SHBG were 3.27 (1.34-7.95) and 2.38 (1.05-5.96), respectively, compared with the referent third tertile, after adjusting for age, smoking status, alcohol drinking, regular exercise, body mass index, blood pressure, fasting plasma glucose, triglyceride, and high-density lipoprotein (HDL) cholesterol level.

CONCLUSION

We found inversely graded associations of low testosterone and SHBG levels with leukocyte count. These findings suggest that low testosterone and SHBG levels may be interpreted as a state of low-grade inflammation.