Cyclosporin a treatment is able to revert the decrease in circulating GH and IGF-I and the increase in IGFBPs induced...

Area of Science:

• Endocrinology
• Immunology
• Pharmacology

Background:

• Adjuvant-induced arthritis in rats causes detrimental changes in growth hormone (GH), insulin-like growth factor-I (IGF-I), and IGF-binding proteins (IGFBPs).
• These hormonal alterations are linked to reduced body weight gain during the inflammatory condition.

Purpose of the Study:

• To investigate if cyclosporin A can reverse the endocrine dysregulation associated with arthritis.
• To determine the impact of cyclosporin A on the growth hormone/IGF-I axis and IGFBPs in arthritic rats.

Main Methods:

• Male Sprague-Dawley rats were induced with adjuvant arthritis.
• Arthritic rats received cyclosporin A (15 mg/kg) or vehicle from day 16 to 23 post-induction.
• Serum levels of GH, IGF-I, and IGFBPs were measured, along with body weight and arthritis index.

Main Results:

• Arthritis significantly decreased body weight gain, GH, and IGF-I levels, while increasing IGFBPs.
• Cyclosporin A administration prevented the decrease in body weight and GH in arthritic rats.
• Cyclosporin A increased circulating IGF-I and normalized IGFBPs in arthritic rats, showing a negative correlation between IGF-I and arthritis severity.

Conclusions:

• Cyclosporin A effectively counteracts arthritis-induced reductions in GH and IGF-I.
• The modulation of the GH-IGF-IGFBPs system by cyclosporin A may contribute to its beneficial effects on body weight in arthritic conditions.
• Cyclosporin A demonstrates potential in managing endocrine disturbances associated with inflammatory diseases.