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Loss of MAGEL2 in Prader-Willi syndrome leads to decreased secretory granule and neuropeptide production

Prader-Willi syndrome (PWS) is a developmental disorder caused by loss of maternally imprinted genes on 15q11-q13, including melanoma antigen gene family member L2 (MAGEL2). The clinical phenotypes of PWS suggest impaired hypothalamic neuroendocrine function; however, the exact cellular defects are...

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Autores principales: Chen, Helen, Victor, A. Kaitlyn, Klein, Jonathon, Tacer, Klementina Fon, Tai, Derek J.C., de Esch, Celine, Nuttle, Alexander, Temirov, Jamshid, Burnett, Lisa C., Rosenbaum, Michael, Zhang, Yiying, Ding, Li, Moresco, James J., Diedrich, Jolene K., Yates, John R., Tillman, Heather S., Leibel, Rudolph L., Talkowski, Michael E., Billadeau, Daniel D., Reiter, Lawrence T., Potts, Patrick Ryan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Society for Clinical Investigation 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7526459/
https://www.ncbi.nlm.nih.gov/pubmed/32879135
http://dx.doi.org/10.1172/jci.insight.138576
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author Chen, Helen
Victor, A. Kaitlyn
Klein, Jonathon
Tacer, Klementina Fon
Tai, Derek J.C.
de Esch, Celine
Nuttle, Alexander
Temirov, Jamshid
Burnett, Lisa C.
Rosenbaum, Michael
Zhang, Yiying
Ding, Li
Moresco, James J.
Diedrich, Jolene K.
Yates, John R.
Tillman, Heather S.
Leibel, Rudolph L.
Talkowski, Michael E.
Billadeau, Daniel D.
Reiter, Lawrence T.
Potts, Patrick Ryan
author_facet Chen, Helen
Victor, A. Kaitlyn
Klein, Jonathon
Tacer, Klementina Fon
Tai, Derek J.C.
de Esch, Celine
Nuttle, Alexander
Temirov, Jamshid
Burnett, Lisa C.
Rosenbaum, Michael
Zhang, Yiying
Ding, Li
Moresco, James J.
Diedrich, Jolene K.
Yates, John R.
Tillman, Heather S.
Leibel, Rudolph L.
Talkowski, Michael E.
Billadeau, Daniel D.
Reiter, Lawrence T.
Potts, Patrick Ryan
author_sort Chen, Helen
collection PubMed
description Prader-Willi syndrome (PWS) is a developmental disorder caused by loss of maternally imprinted genes on 15q11-q13, including melanoma antigen gene family member L2 (MAGEL2). The clinical phenotypes of PWS suggest impaired hypothalamic neuroendocrine function; however, the exact cellular defects are unknown. Here, we report deficits in secretory granule (SG) abundance and bioactive neuropeptide production upon loss of MAGEL2 in humans and mice. Unbiased proteomic analysis of Magel2(pΔ/m+) mice revealed a reduction in components of SG in the hypothalamus that was confirmed in 2 PWS patient–derived neuronal cell models. Mechanistically, we show that proper endosomal trafficking by the MAGEL2-regulated WASH complex is required to prevent aberrant lysosomal degradation of SG proteins and reduction of mature SG abundance. Importantly, loss of MAGEL2 in mice, NGN2-induced neurons, and human patients led to reduced neuropeptide production. Thus, MAGEL2 plays an important role in hypothalamic neuroendocrine function, and cellular defects in this pathway may contribute to PWS disease etiology. Moreover, these findings suggest unanticipated approaches for therapeutic intervention.
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spelling pubmed-75264592020-10-05 Loss of MAGEL2 in Prader-Willi syndrome leads to decreased secretory granule and neuropeptide production Chen, Helen Victor, A. Kaitlyn Klein, Jonathon Tacer, Klementina Fon Tai, Derek J.C. de Esch, Celine Nuttle, Alexander Temirov, Jamshid Burnett, Lisa C. Rosenbaum, Michael Zhang, Yiying Ding, Li Moresco, James J. Diedrich, Jolene K. Yates, John R. Tillman, Heather S. Leibel, Rudolph L. Talkowski, Michael E. Billadeau, Daniel D. Reiter, Lawrence T. Potts, Patrick Ryan JCI Insight Research Article Prader-Willi syndrome (PWS) is a developmental disorder caused by loss of maternally imprinted genes on 15q11-q13, including melanoma antigen gene family member L2 (MAGEL2). The clinical phenotypes of PWS suggest impaired hypothalamic neuroendocrine function; however, the exact cellular defects are unknown. Here, we report deficits in secretory granule (SG) abundance and bioactive neuropeptide production upon loss of MAGEL2 in humans and mice. Unbiased proteomic analysis of Magel2(pΔ/m+) mice revealed a reduction in components of SG in the hypothalamus that was confirmed in 2 PWS patient–derived neuronal cell models. Mechanistically, we show that proper endosomal trafficking by the MAGEL2-regulated WASH complex is required to prevent aberrant lysosomal degradation of SG proteins and reduction of mature SG abundance. Importantly, loss of MAGEL2 in mice, NGN2-induced neurons, and human patients led to reduced neuropeptide production. Thus, MAGEL2 plays an important role in hypothalamic neuroendocrine function, and cellular defects in this pathway may contribute to PWS disease etiology. Moreover, these findings suggest unanticipated approaches for therapeutic intervention. American Society for Clinical Investigation 2020-09-03 /pmc/articles/PMC7526459/ /pubmed/32879135 http://dx.doi.org/10.1172/jci.insight.138576 Text en © 2020 Chen et al. http://creativecommons.org/licenses/by/4.0/ This work is licensed under the Creative Commons Attribution 4.0 International License. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Research Article
Chen, Helen
Victor, A. Kaitlyn
Klein, Jonathon
Tacer, Klementina Fon
Tai, Derek J.C.
de Esch, Celine
Nuttle, Alexander
Temirov, Jamshid
Burnett, Lisa C.
Rosenbaum, Michael
Zhang, Yiying
Ding, Li
Moresco, James J.
Diedrich, Jolene K.
Yates, John R.
Tillman, Heather S.
Leibel, Rudolph L.
Talkowski, Michael E.
Billadeau, Daniel D.
Reiter, Lawrence T.
Potts, Patrick Ryan
Loss of MAGEL2 in Prader-Willi syndrome leads to decreased secretory granule and neuropeptide production
title Loss of MAGEL2 in Prader-Willi syndrome leads to decreased secretory granule and neuropeptide production
title_full Loss of MAGEL2 in Prader-Willi syndrome leads to decreased secretory granule and neuropeptide production
title_fullStr Loss of MAGEL2 in Prader-Willi syndrome leads to decreased secretory granule and neuropeptide production
title_full_unstemmed Loss of MAGEL2 in Prader-Willi syndrome leads to decreased secretory granule and neuropeptide production
title_short Loss of MAGEL2 in Prader-Willi syndrome leads to decreased secretory granule and neuropeptide production
title_sort loss of magel2 in prader-willi syndrome leads to decreased secretory granule and neuropeptide production
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7526459/
https://www.ncbi.nlm.nih.gov/pubmed/32879135
http://dx.doi.org/10.1172/jci.insight.138576
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