Volume 11, Issue 2 pp. 213-222

Sustained high levels of neuregulin-1 in the longest-lived rodents; a key determinant of rodent longevity

Yael H. Edrey

Yael H. Edrey

Department of Biology, The City College of New York, 138 st @Convent Ave, New York, NY 10031, USA

Department of Epidemiology and Biostatistics, UTHSCSA, 7703 Floyd Curl Drive, San Antonio, TX 78229, USA

Barshop Institute for Longevity and Aging Studies, UTHSCSA 15355 Lambda drive, San Antonio, TX 78245, USA

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Diana Casper

Diana Casper

Neurosurgery lab, The Albert Einstein College of Medicine and Montefiore Medical Center, Moses 3, 111 East 210th Street, The Bronx, NY 10467, USA

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Dorothee Huchon

Dorothee Huchon

Department of Zoology, George S. Wise Faculty of Life Sciences, Tel-Aviv University, Tel-Aviv 69978, Israel

National Evolutionary Synthesis Center, 2024 W. Main St., Suite A200, Durham, NC 27705, USA

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James Mele

James Mele

Department of Epidemiology and Biostatistics, UTHSCSA, 7703 Floyd Curl Drive, San Antonio, TX 78229, USA

Barshop Institute for Longevity and Aging Studies, UTHSCSA 15355 Lambda drive, San Antonio, TX 78245, USA

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Jonathan A. Gelfond

Jonathan A. Gelfond

Department of Epidemiology and Biostatistics, UTHSCSA, 7703 Floyd Curl Drive, San Antonio, TX 78229, USA

Department of Epidemiology and Biostatistics, UTHSCSA 7703 Floyd Curl Drive, San Antonio, TX 78229, USA

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Deborah M. Kristan

Deborah M. Kristan

Department of Biological Sciences, California State University San Marcos, 333 S. Twin Oaks Valley Rd. San Marcos, CA 92096, USA

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Eviatar Nevo

Eviatar Nevo

Institute of Evolution, University of Haifa, Mount Carmel, Haifa 31905, Israel

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Rochelle Buffenstein

Rochelle Buffenstein

Department of Biology, The City College of New York, 138 st @Convent Ave, New York, NY 10031, USA

Department of Epidemiology and Biostatistics, UTHSCSA, 7703 Floyd Curl Drive, San Antonio, TX 78229, USA

Barshop Institute for Longevity and Aging Studies, UTHSCSA 15355 Lambda drive, San Antonio, TX 78245, USA

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First published: 21 November 2011
Citations: 65
Rochelle Buffenstein, Barshop Institute for Longevity and Aging Studies, 15355 Lambda Dr. San Antonio, TX 78245, USA. Tel.: 210 562 5062; fax: 210 562 6130; e-mail: [email protected]

Summary

Naked mole-rats (Heterocephalus glaber), the longest-lived rodents, live 7–10 times longer than similarly sized mice and exhibit normal activities for approximately 75% of their lives. Little is known about the mechanisms that allow them to delay the aging process and live so long. Neuregulin-1 (NRG-1) signaling is critical for normal brain function during both development and adulthood. We hypothesized that long-lived species will maintain higher levels of NRG-1 and that this contributes to their sustained brain function and concomitant maintenance of normal activity. We monitored the levels of NRG-1 and its receptor ErbB4 in H. glaber at different ages ranging from 1 day to 26 years and found that levels of NRG-1 and ErbB4 were sustained throughout development and adulthood. In addition, we compared seven rodent species with widely divergent (4–32 year) maximum lifespan potential (MLSP) and found that at a physiologically equivalent age, the longer-lived rodents had higher levels of NRG-1 and ErbB4. Moreover, phylogenetic independent contrast analyses revealed that this significant strong correlation between MLSP and NRG-1 levels was independent of phylogeny. These results suggest that NRG-1 is an important factor contributing to divergent species MLSP through its role in maintaining neuronal integrity.

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