Association between Peripheral Leptin and Adiponectin Levels and Cognitive Decline in Patients with Neurocognitive Disorders ≥65 Years.

BACKGROUND: There is evidence that adipokines have roles in brain functioning and cognitive decline. OBJECTIVE: Assess the role of leptin and adiponectin levels in predicting changes in neuro-cognitive disorders (NCD). METHODS: The study included 205 patients over 65 years of age presenting for a one-day hospitalization for current assessment of cognitive function. Peripheral blood leptin and adiponectin levels were measured at admission. Demographic variables, body mass index (BMI), and history of hypertension were also recorded. Cognitive function was assessed by the Mini-Mental State Examination (MMSE) at admission and at later scheduled visits over a median follow-up period of 14.5 months. Conventional univariate comparisons were made between diagnosis groups (Alzheimer's disease (AD), mild NCD, vascular/mixed dementia). Changes in MMSE scores over time were examined with regard to the above variables using a linear mixed model. RESULTS: The mean BMI was significantly lower (by 2 kg/m2, p = 0.01) in patients with AD than in patients with either mild-NCD or vascular/mixed dementia. Leptin levels were significantly higher (p = 0.043) and adiponectin levels significantly lower (p = 0.045) in patients with mild-NCD than in patients with major-NCD (AD or vascular/mixed dementia). However, the mixed model suggested no influence of the baseline levels of these two biomarkers on the course of cognitive decline. CONCLUSION: The present study confirms the associations between leptin and adiponectin and AD or AD-related disorders but did not confirm that these peptides may be used as predictive biomarkers of cognitive decline.

Pilot study: effectiveness of a training program about autonomy in elderly patients hospitalized after an acute episode.

Patients hospitalized in rehabilitation after an acute episode is at high risk of functional impairment and require active measures to prevent loss of autonomy. Resistance training has been proved beneficial to improve physical performances of aged subjects in the community. However, the feasibility and effects of training programs has never been assessed among hospitalized patients after an acute medical episode. In this pilot study, we aimed to evaluate a personalized training program of adapted physical education teacher combining muscular reinforcement and endurance training among patients over 65 year-old hospitalized in a geriatric rehabilitation care setting. The principal outcome considered was the evolution of the SPPB (short physical performance battery) score from baseline, after the 3-week period of training. Thirty-eight patients (mean age> 80 years) participated to the program. The mean SPPB score at baseline was 6.37 points (standard deviation: 2.17). After the intervention, the SPPB showed a significant improvement of 2.50 points, to reach 8.87 points (standard deviation: ±1.60; p=0.001). These results confirm the feasibility of resistance-training programs among hospitalized elderly. The observed improvements in terms of physic al performances also appear promising with regard to the prevention of loss of autonomy during rehabilitation after acute medical episodes.