Drinking water temperature affects cognitive function and progression of Alzheimer's disease in a mouse model.

Lifestyle factors may affect mental health and play a critical role in the development of neurodegenerative diseases including Alzheimer's disease (AD). However, whether the temperatures of daily beverages have any impact on cognitive function and AD development has never been studied. In this study, we investigated the effects of daily drinking water temperatures on cognitive function and AD development and progression in mice and the underlying mechanisms. Cognitive function of mice was assessed using passive avoidance test, open field test, and Morris water maze. Wild-type Kunming mice receiving intragastric water (IW, 10 mL/kg, 2 times/day) at 0 °C for consecutive 15 days displayed significant cognitive defects accompanied by significant decrease in gain of body weight, gastric emptying rate, pepsin activity, and an increase in the energy charge in the cortex when compared with mice receiving the same amount of IW at 25 °C (a temperature mimicking most common drinking habits in human), suggesting the altered neuroenergetics may cause cognitive decline. Similarly, in the transgenic APPwse/PS1De9 familial AD mice and their age- and gender-matched wild-type C57BL/6 mice, receiving IW at 0 °C, but not at 25 °C, for 35 days caused a significant time-dependent decrease in body weight and cognitive function, accompanied by a decreased expression of PI3K, Akt, the glutamate/GABA ratio, as well as neuropathy with significant amyloid lesion in the cortex and hippocampus. All of these changes were significantly aggravated in the APPwse/PS1De9 mice than in the control C57BL/6 mice. These data demonstrate that daily beverage at 0 °C may alter brain insulin-mediated neuroenergetics, glutamate/GABA ratio, cause cognitive decline and neuropathy, and promote AD progression.

Emerging biologic frontiers for Sjogren's syndrome: Unveiling novel approaches with emphasis on extra glandular pathology.

Primary Sjögren's Syndrome (pSS) is a complex autoimmune disorder characterized by exocrine gland dysfunction, leading to dry eyes and mouth. Despite growing interest in biologic therapies for pSS, FDA approval has proven challenging due to trial complications. This review addresses the absence of a molecular-target-based approach to biologic therapy development and highlights novel research on drug targets and clinical trials. A literature search identified potential pSS treatment targets and recent advances in molecular understanding. Overlooking extraglandular symptoms like fatigue and depression is a notable gap in trials. Emerging biologic agents targeting cytokines, signal pathways, and immune responses have proven efficacy. These novel therapies could complement existing methods for symptom alleviation. Improved grading systems accounting for extraglandular symptoms are needed. The future of pSS treatment may involve gene, stem-cell, and tissue-engineering therapies. This narrative review offers insights into advancing pSS management through innovative biologic interventions.

[Study on the differentially expressed genes of steroid-resistant and steroid-sensitive nephrotic syndrome].

OBJECTIVE: To identify the genes differentially expressed among the steroid-resistant nephrotic syndrome (SRNS), steroid-sensitive nephrotic syndrome (SSNS) and normal children, and understand the molecular mechanism of SRNS. METHODS: Affymetrix microarray technology was used to obtain such a profile. The differentially expressed genes among these groups were identified based on signal-to-noise ratios by GCOS software; real-time PCR analysis was performed to confirm the microarray results. RESULTS: There were 157 genes differentially expressed among these groups. The genes up-regulated both in SRNS and SSNS were involved primarily in ionic transportation, immuno-signal transduction and apoptosis. In particular, CLNS1A gene was down regulated in SRNS but up regulated in SSNS. CONCLUSION: Several differentially expressed genes, such as CLNS1A and HLA-DRB4 were found to be closely related to the pathogenesis of SRNS and SSNS. This DNA microarray analysis has provided some important clue to the molecular mechanism of SRNS.