Biological Trace Element Research

, Volume 75, Issue 1–3, pp 21–27 | Cite as

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

  • Chao-Wen Cheng
  • Pi-Yao Lin
  • Ming-Der Chen


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.

Index Entries

Zinc neuropeptide Y nitric oxide synthase energy intake appetite adult mice 


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Copyright information

© Humana Press Inc 2000

Authors and Affiliations

  • Chao-Wen Cheng
    • 1
  • Pi-Yao Lin
    • 2
  • Ming-Der Chen
    • 3
  1. 1.Department of BiologyTunghai UniversityTaichung
  2. 2.Department of ChemistryTunghai UniversityTaichung
  3. 3.Division of Endocrinology and Metabolism, Department of Internal MedicineTaichung Veterans General HospitalTaichungTaiwan, Republic of China

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