Loss of GPR75 protects against non-alcoholic fatty liver disease and body fat accumulation

Alasdair Leeson-Payne, Jean Iyinikkel, Cameron Malcolm, Brian Y H Lam, Nadine Sommer, Georgina K C Dowsett, Pablo Blanco Martinez de Morentin, Dawn Thompson, Alasdair MacKenzie, Raffaella Chianese, Katherine A Kentistou, Eugene J. Gardner, John R.B. Perry, Felix Grassmann, John Speakman, Justin Rochford, Giles S. H. Yeo, Fiona Murray, Lora Heisler* (Corresponding Author)

*Corresponding author for this work

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Abstract

Approximately 1 in 4 people worldwide have non-alcoholic fatty liver disease (NAFLD), however there are currently no medications to treat this condition. This study investigated the role of adiposity-associated orphan G-protein coupled receptor 75 (GPR75) in liver lipid accumulation. We profiled Gpr75 expression and report that it is most abundant in brain. Next, we generated the first single cell level analysis of Gpr75 and identified a subpopulation co-expressed with key appetite regulating hypothalamic neurons. CRISPR/Cas9-deleted Gpr75 mice fed a palatable Western diet high in fat adjusted caloric intake to remain in energy balance, thereby preventing NAFLD. Consistent with mouse results, analysis of whole exome sequencing data from 428,719 individuals (UK Biobank) revealed that variants in GPR75 are associated with a reduced likelihood of hepatic steatosis. Here we provide a significant advance in understanding of the expression and function of GPR75, demonstrating it is a promising pharmaceutical target for NAFLD treatment.
Original languageEnglish
Pages (from-to)1076-1087
Number of pages12
JournalCell Metabolism
Volume36
Issue number5
Early online date22 Apr 2024
DOIs
Publication statusPublished - 7 May 2024

Bibliographical note

Open Access via the Elsevier Agreement

L.K.H. designed the experiments with input from F.M., G.S.H.Y., and J.J.R.; F.M. and J.I. created the CRISPR-Cas9-deleted Gpr75 mouse line with input from A.M.; A.L.-P., C.M., B.Y.H.L., G.K.C.D., N.S., P.B.M.d.M., R.C., K.K., E.J.G., J.R.B.P., F.G., J.R.S., and J.J.R. performed experiments and/or data analysis; D.T. provided reagents and intellectual contributions; and L.K.H. and A.L.-P. wrote the manuscript with input from all other authors.

Data Availability Statement

Materials availability

Mouse lines generated in this study are available at request to co-corresponding author, Fiona Murray ([email protected]

).
Data and code availability

Single-cell RNA-seq data have been deposited at Cambridge Repository and are publicly available. The hypothalamic nucSeq are available in an interactive CellxGene viewer (available via https://www.mrl.ims.cam.ac.uk
). Additionally, the Seurat object containing the HypoMap is deposited at University of Cambridge’s Apollo Repository (https://doi.org/10.17863/CAM.87955) in standard RDS format. The source data for the HypoMap can be found CELLxGENE (https://cellxgene.cziscience.com/collections/d86517f0-fa7e-4266-b82e-a521350d6d36) accession numbers: GSE132355, GSE193921, GSE132730, GSE207736, GSE113576, GSE172204, SRP135960, GSE167927, GSE172461, GSE130597, GSE132608, GSE119960, GSE93374, GSE125065, GSE117295, GSE146692, GSE87544. All code is publicly available as of the date of publication and DOIs are listed in the key resources table. Details of any additional information required to reanalyze the data reported in this paper is available from the lead contact upon request. Source data are provided with this paper and all data will be shared by the lead contact upon request.

Keywords

  • G protein-coupled receptor
  • Gpr75
  • NAFLD
  • obesity
  • physical activity
  • fatty liver

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