Brain researchApr 13, 2010

Gene activity differences between two types of nerve cells controlling hunger in the brain

GLP-1 Therapies Weekly Brief ↗PubMed ↗DOI ↗

Updated Apr 3, 2026

Abstract

Twenty genes were differentially expressed in the Dorsomedial Nucleus of the Hypothalamus (DMH) Neuropeptide Y (NPY) neurons compared to those in the Arcuate Nucleus of the Hypothalamus (ARH).

DMH-NPY neurons may play a distinct role in energy homeostasis regulation.
Several transcription factors, important for energy balance, were identified in DMH-NPY neurons.
DMH-NPY neurons expressed Glutamic Acid Decarboxylase (GAD) 65 and 67, indicating potential GABAergic properties.
In contrast to ARH-NPY neurons, DMH-NPY neurons did not express leptin receptors or activate STAT3 in response to leptin.
These findings suggest that DMH-NPY neurons are regulated differently from ARH-NPY neurons.

Simplified

The Dorsomedial Nucleus of the Hypothalamus (DMH) is known to play important roles in ingestive behavior and body weight homeostasis. The DMH contains neurons expressing Neuropeptide Y (NPY) during specific physiological conditions of hyperphagia and obesity, however, the role of DMH-NPY neurons has yet to be characterized. In contrast to the DMH-NPY neurons, NPY expressing neurons have been best characterized in the Arcuate Nucleus of the Hypothalamus (ARH). The purpose of this study is to characterize the chemical phenotype of DMH-NPY neurons by comparing the gene expression profiles of NPY neurons in the DMH and ARH isolated from postnatal NPY-hrGFP mice by microarray analysis. Twenty genes were differentially expressed in the DMH-NPY neurons compared to the ARH. Among them, there were several transcriptional factors that play important roles in the regulation of energy balance. DMH-NPY neurons expressed Glutamic Acid Decarboxylase (GAD) 65 and 67, suggesting that they may be GABAergic, similar to ARH-NPY neurons. While ARH-NPY neurons expressed leptin receptor (ObRb) and displayed the activation of STAT3 in response to leptin administration, DMH-NPY neurons showed neither. These findings strongly suggest that DMH-NPY neurons could play a distinct role in the control of energy homeostasis and are differentially regulated from ARH-NPY neurons through afferent inputs and transcriptional regulators.

Full Text

Full text is available at the source.

View Full Text ↗

Gene activity differences between two types of nerve cells controlling hunger in the brain

Abstract

Full Text

You found one interesting study. We’ll send the next 7.

What Lands in Your Inbox Each Week:

Recent issues from the glp-1 therapies brief

Abstract

Full Text

Related papers

You found one interesting study. We’ll send the next 7.

What Lands in Your Inbox Each Week:

Recent issues from the glp-1 therapies brief