Volume 31, Issue 2 e12687
ORIGINAL ARTICLE

RANK deletion in neuropeptide Y neurones attenuates oestrogen deficiency-related bone loss

Nicola J. Lee

Corresponding Author

Nicola J. Lee

Neuroscience Division, Garvan Institute, St Vincent's Hospital, Darlinghurst, New South Wales, Australia

St Vincents Clinical School, UNSW Sydney, Sydney, New South Wales, Australia

Correspondence

Nicola J. Lee and Herbert Herzog, Neuroscience Division, Garvan Institute, St Vincent's Hospital, Darlinghurst, NSW, Australia.

Emails: [email protected]; [email protected]

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Ireni M. Clarke

Ireni M. Clarke

Neuroscience Division, Garvan Institute, St Vincent's Hospital, Darlinghurst, New South Wales, Australia

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Ayse Zengin

Ayse Zengin

Bone Biology Division, Garvan Institute, St Vincent's Hospital, Darlinghurst, New South Wales, Australia

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Ronaldo F. Enriquez

Ronaldo F. Enriquez

Neuroscience Division, Garvan Institute, St Vincent's Hospital, Darlinghurst, New South Wales, Australia

Bone Biology Division, Garvan Institute, St Vincent's Hospital, Darlinghurst, New South Wales, Australia

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Vanj Nagy

Vanj Nagy

Institute of Molecular Biotechnology of the Austrian Academy of Sciences (IMBA), Vienna, Austria

Ludwig Boltzmann Institute for Rare and Undiagnosed Diseases, Vienna, Austria

CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria

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Josef M. Penninger

Josef M. Penninger

Institute of Molecular Biotechnology of the Austrian Academy of Sciences (IMBA), Vienna, Austria

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Paul A. Baldock

Paul A. Baldock

St Vincents Clinical School, UNSW Sydney, Sydney, New South Wales, Australia

Bone Biology Division, Garvan Institute, St Vincent's Hospital, Darlinghurst, New South Wales, Australia

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Herbert Herzog

Corresponding Author

Herbert Herzog

Neuroscience Division, Garvan Institute, St Vincent's Hospital, Darlinghurst, New South Wales, Australia

St Vincents Clinical School, UNSW Sydney, Sydney, New South Wales, Australia

Correspondence

Nicola J. Lee and Herbert Herzog, Neuroscience Division, Garvan Institute, St Vincent's Hospital, Darlinghurst, NSW, Australia.

Emails: [email protected]; [email protected]

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First published: 11 January 2019
Citations: 3

Abstract

The RANKL pathway is known to be an important aspect of the pathogenesis of oestrogen deficiency-induced bone loss. RANK deletion specifically in neuropeptide Y (NPY) neurones has been shown to enhance the ability of the skeleton to match increases in body weight caused by high-fat diet feeding, likely via the modulation of NPY levels. In the present study, we used ovariectomy in female mice to show that RANK deletion in NPY neurones attenuates bone loss caused by long-term oestrogen deficiency, particularly in the vertebral compartment. Ovariectomy led to a reduction in NPY expression levels in the arcuate nucleus of NPYcre/+;RANKlox/lox mice compared to NPYcre/+;RANKlox/+ controls. Because NPY deficient mice also displayed a similar protection against ovariectomy-induced bone loss, modulation of hypothalamic NPY signalling is the likely mechanism behind the protection from bone loss in the NPYcre/+;RANKlox/lox mice.

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