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Intra-supraoptic nucleus sulpiride improves anorexia in tumor-bearing rats
T Sato1, S O Fetissov, M M Meguid
1Neuroscience Program, Surgical Metabolism and Nutrition Laboratory, Department of Surgery, University Hospital, SUNY Upstate Medical University, 750 East Adams Street, Syracuse, NY 13210, USA.
Neuroreport
|August 10, 2001
Summary
Injecting sulpiride into the supraoptic nucleus (SON) significantly increased food intake in tumor-bearing rats. This suggests targeting the hypothalamic dopaminergic system can help manage cancer anorexia.
Area of Science:
- Neuroscience
- Endocrinology
- Oncology
Background:
- The dopaminergic system in the supraoptic nucleus (SON) influences water balance and food intake.
- Previous research showed D2 receptor antagonist sulpiride increases food intake in anorectic rats when injected into other hypothalamic nuclei.
Purpose of the Study:
- To investigate if sulpiride injection into the SON could alleviate cancer anorexia in tumor-bearing rats.
Main Methods:
- Sulpiride (4 microg/0.5 microl) was injected into the bilateral SON of anorectic tumor-bearing male rats.
- Food intake was monitored, analyzing meal size and meal number.
Main Results:
- Sulpiride injection into the SON significantly improved food intake in tumor-bearing rats.
- This improvement was attributed to increases in both meal size and meal frequency.
Conclusions:
- Pharmacological manipulation of the hypothalamic dopaminergic system, specifically within the SON, is a viable strategy for ameliorating cancer anorexia.
- Targeting the SON offers a potential therapeutic avenue for managing appetite loss in cancer patients.