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Reizes, O. et al.

Reizes, Lincecum, Wang, Goldberger, Huang, Kaksonen, Ahima, Hinkes, Barsh, Rauvala, Bernfield,

Transgenic expression of syndecan-1 uncovers a physiological control of feeding behavior by syndecan-3.

Transgenic expression in the hypothalamus of syndecan-1, a cell surface heparan sulfate proteoglycan ( HSPG) and modulator of ligand-receptor encounters, produces mice with hyperphagia and maturity-onset obesity resembling mice with reduced action of alpha melanocyte stimulating hormone (alphaMSH). Via their HS chains, syndecans potentiate the action of agouti-related protein and agouti signaling protein, endogenous inhibitors of alphaMSH. In wild-type mice, syndecan-3, the predominantly neural syndecan, is expressed in hypothalamic regions that control energy balance. Food deprivation increases hypothalamic syndecan-3 levels several-fold. Syndecan-3 null mice, otherwise apparently normal, respond to food deprivation with markedly reduced reflex hyperphagia. We propose that oscillation of hypothalamic syndecan-3 levels physiologically modulates feeding behavior.[1]

References

Transgenic expression of syndecan-1 uncovers a physiological control of feeding behavior by syndecan-3. Reizes, O., Lincecum, J., Wang, Z., Goldberger, O., Huang, L., Kaksonen, M., Ahima, R., Hinkes, M.T., Barsh, G.S., Rauvala, H., Bernfield, M. Cell (2001) [Pubmed]

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