Hypertriglyceridemia-induced brain-derived neurotrophic factor in rat submandibular glands

Area of Science:

• Neuroscience
• Endocrinology
• Biochemistry

Background:

• Salivary glands produce brain-derived neurotrophic factor (BDNF), influencing plasma BDNF levels and hippocampal function.
• Elevated BDNF is linked to anxiety-like behaviors, and dyslipidemia can promote depression and anxiety.
• The impact of hypertriglyceridemia on salivary BDNF expression remains largely unexplored.

Purpose of the Study:

• To investigate the effect of hypertriglyceridemia on salivary BDNF expression in a rat model.
• To explore the potential relationship between altered lipid metabolism and neurotrophic factor production in saliva.

Main Methods:

• A hypertriglyceridemia rat model was established through a 10-week high-fat diet.
• BDNF protein levels in saliva and submandibular glands were quantified using ELISA.
• Bdnf mRNA expression in the submandibular gland was analyzed via real-time PCR.

Main Results:

• Successful establishment of a hypertriglyceridemia rat model without significant body weight changes.
• Increased BDNF mRNA and protein expression were observed in the submandibular glands of hypertriglyceridemic rats.
• Significantly elevated BDNF levels were detected in the saliva of rats with hypertriglyceridemia.

Conclusions:

• This study provides the first evidence that hypertriglyceridemia induces BDNF expression in rat submandibular glands.
• The findings suggest a novel association between salivary BDNF and lipid metabolism.
• Salivary BDNF may play a role in the neurobiological consequences of hypertriglyceridemia.