Zinc and nitric oxide synthase inhibitor L-NAME attenuate NPY-induced feeding in mice

Chao Wen Cheng, Pi Yao Lin, Ming Der Chen

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


The influences of zinc (Zn) and the nitric oxide synthase (NOS) inhibitor L-NAME on peripheral neuropeptide Y (NPY)-induced feeding in mice were investigated. Male mice received NPY (200 ng/d/mouse subcutaneously) and were separated into four groups based on cotreatments (with or without Zn [0.1 mg/mL]) and with or without L-NAME [0.2 mg/mL]) administered in drinking water for 10 d. A control group that received saline injection was also studied. The results showed that NPY, with or without any studied chemicals, did not affect body weight gain or body fat content. However, the mice that were administered NPY alone had increased energy intakes, higher serum triglyceride and free fatty acid, and lower serum glucose than saline- injected controls. NPY-treated mice that were given Zn and L-NAME cotreatments had compatible results of determined variables in comparison with control mice. This study showed that Zn and L-NAME attenuated NPY- mediated feeding and selected serum variables in mice. However, the mechanisms of the interactions among NPY, Zn and NOS, and their effects on appetite regulation, remain to be elucidated.

Original languageEnglish
Pages (from-to)21-27
Number of pages7
JournalBiological Trace Element Research
Issue number1-3
Publication statusPublished - 2000
Externally publishedYes


  • Adult mice
  • Appetite
  • Energy intake
  • Neuropeptide Y
  • Nitric oxide synthase
  • Zinc

ASJC Scopus subject areas

  • General Biochemistry,Genetics and Molecular Biology
  • Endocrinology
  • Endocrinology, Diabetes and Metabolism


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