Chronic calorie restriction attenuates experimental autoimmune encephalomyelitis

Area of Science:

• Neuroscience
• Immunology
• Metabolic Research

Background:

• Calorie restriction (CR) is known to prevent age-associated diseases and extend lifespan.
• CR induces anti-inflammatory, antioxidant, and neuroprotective effects.
• These effects suggest CR may be beneficial for multiple sclerosis (MS).

Purpose of the Study:

• To determine if CR or increased calorie intake affects the course of experimental autoimmune encephalomyelitis (EAE), the primary animal model for MS.
• To compare the effects of CR and high-calorie diets on EAE progression.

Main Methods:

• SJL and C57BL/6 mice underwent 40% CR starting at 5 weeks of age for 5 weeks.
• EAE was induced using proteolipid protein (SJL mice) or myelin oligodendrocyte glycoprotein (C57BL/6 mice).
• Clinical, histologic, and immunologic features of EAE were assessed and compared to ad libitum-fed and high-calorie diet-fed mice.

Main Results:

• CR significantly ameliorated clinical EAE in both mouse strains.
• CR led to reduced inflammation, demyelination, and axon injury in EAE models.
• CR increased plasma corticosterone and adiponectin, while decreasing IL-6 and leptin, without suppressing immune function.

Conclusions:

• CR demonstrates therapeutic potential in EAE by reducing inflammation and neurodegeneration.
• The observed hormonal and metabolic changes suggest combined anti-inflammatory and neuroprotective mechanisms.
• CR warrants further investigation as a potential complementary treatment for MS, emphasizing adequate nutrition and medical monitoring.