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Finan, B. ; Yang, B.* ; Ottaway, N.* ; Stemmer, K. ; Müller, T.D. ; Yi, C.-X. ; Habegger, K.* ; Schriever, S.C. ; García-Cáceres, C. ; Kabra, D.G. ; Hembree, J.* ; Holland, J.* ; Raver, C.* ; Seeley, R.J.* ; Hans, W. ; Irmler, M. ; Beckers, J. ; Hrabě de Angelis, M. ; Tiano, J.P.* ; Mauvais-Jarvis, F.* ; Perez-Tilve, D.* ; Pfluger, P.T. ; Zhang, L.* ; Gelfanov, V.* ; DiMarchi, R.D.* ; Tschöp, M.H.

Targeted estrogen delivery reverses the metabolic syndrome.

J. Nat. Med. 18, 1847-1856 (2012)

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We report the development of a new combinatorial approach that allows for peptide-mediated selective tissue targeting of nuclear hormone pharmacology while eliminating adverse effects in other tissues. Specifically, we report the development of a glucagon-like peptide-1 (GLP-1)-estrogen conjugate that has superior sex-independent efficacy over either of the individual hormones alone to correct obesity, hyperglycemia and dyslipidemia in mice. The therapeutic benefits are driven by pleiotropic dual hormone action to improve energy, glucose and lipid metabolism, as shown by loss-of-function models and genetic action profiling. Notably, the peptide-based targeting strategy also prevents hallmark side effects of estrogen in male and female mice, such as reproductive endocrine toxicity and oncogenicity. Collectively, selective activation of estrogen receptors in GLP-1-targeted tissues produces unprecedented efficacy to enhance the metabolic benefits of GLP-1 agonism. This example of targeting the metabolic syndrome represents the discovery of a new class of therapeutics that enables synergistic co-agonism through peptide-based selective delivery of small molecules. Although our observations with the GLP-1-estrogen conjugate justify translational studies for diabetes and obesity, the multitude of other possible combinations of peptides and small molecules may offer equal promise for other diseases.

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