PMID- 32581099 OWN - NLM STAT- MEDLINE DCOM- 20201130 LR - 20210515 IS - 1098-5514 (Electronic) IS - 0022-538X (Print) IS - 0022-538X (Linking) VI - 94 IP - 17 DP - 2020 Aug 17 TI - CD300LF Polymorphisms of Inbred Mouse Strains Confer Resistance to Murine Norovirus Infection in a Cell Type-Dependent Manner. LID - 10.1128/JVI.00837-20 [doi] LID - e00837-20 AB - Human norovirus is the leading cause of gastroenteritis worldwide, yet basic questions about its life cycle remain unanswered due to an historical lack of robust experimental systems. Recent studies on the closely related murine norovirus (MNV) have identified CD300LF as an indispensable entry factor for MNV. We compared the MNV susceptibilities of cells from different mouse strains and identified polymorphisms in murine CD300LF which are critical for its function as an MNV receptor. Bone marrow-derived macrophages (BMDMs) from I/LnJ mice were resistant to infection from multiple MNV strains which readily infect BMDMs from C57BL/6J mice. The resistance of I/LnJ BMDMs was specific to MNV, since the cells supported infection of other viruses comparably to C57BL/6J BMDMs. Transduction of I/LnJ BMDMs with C57BL/6J CD300LF made the cells permissible to MNV infection, suggesting that the cause of resistance lies in the entry step of MNV infection. In fact, we mapped this phenotype to a 4-amino-acid difference at the CC' loop of CD300LF; swapping of these amino acids between C57BL/6J and I/LnJ CD300LF proteins made the mutant C57BL/6J CD300LF functionally impaired and the corresponding mutant of I/LnJ CD300LF functional as an MNV entry factor. Surprisingly, expression of the I/LnJ CD300LF in other cell types made the cells infectible by MNV, even though the I/LnJ allele did not function as an MNV receptor in macrophage-like cells. Correspondingly, I/LnJ CD300LF bound MNV virions in permissive cells but not in nonpermissive cells. Collectively, our data suggest the existence of a cell type-specific modifier of MNV entry.IMPORTANCE MNV is a prevalent model system for studying human norovirus, which is the leading cause of gastroenteritis worldwide and thus a sizeable public health burden. Elucidating mechanisms underlying susceptibility of host cells to MNV infection can lead to insights on the roles that specific cell types play during norovirus pathogenesis. Here, we show that different alleles of the proteinaceous receptor for MNV, CD300LF, function in a cell type-dependent manner. In contrast to the C57BL/6J allele, which functions as an MNV entry factor in all tested cell types, including human cells, I/LnJ CD300LF does not function as an MNV entry factor in macrophage-like cells but does allow MNV entry in other cell types. Together, these observations indicate the existence of cell type-specific modifiers of CD300LF-dependent MNV entry. CI - Copyright (c) 2020 Furlong et al. FAU - Furlong, Kevin AU - Furlong K AD - Committee on Microbiology, The University of Chicago, Chicago, Illinois, USA. FAU - Biering, Scott B AU - Biering SB AD - Committee on Microbiology, The University of Chicago, Chicago, Illinois, USA. FAU - Choi, Jayoung AU - Choi J AD - Department of Pathology, The University of Chicago, Chicago, Illinois, USA. FAU - Wilen, Craig B AU - Wilen CB AD - Department of Laboratory Medicine, Yale University School of Medicine, New Haven, Connecticut, USA. AD - Department of Immunobiology, Yale University School of Medicine, New Haven, Connecticut, USA. FAU - Orchard, Robert C AU - Orchard RC AUID- ORCID: 0000-0001-8216-4946 AD - Department of Immunology, The University of Texas Southwestern Medical Center, Dallas, Texas, USA. FAU - Wobus, Christiane E AU - Wobus CE AUID- ORCID: 0000-0001-5286-0924 AD - Department of Microbiology and Immunology, University of Michigan, Ann Arbor, Michigan, USA. FAU - Nelson, Christopher A AU - Nelson CA AD - Department of Pathology & Immunology, Washington University, St. Louis, Missouri, USA. AD - Department of Biochemistry & Molecular Biophysics, Washington University, St. Louis, Missouri, USA. AD - Department of Molecular Microbiology, Washington University, St. Louis, Missouri, USA. FAU - Fremont, Daved H AU - Fremont DH AD - Department of Pathology & Immunology, Washington University, St. Louis, Missouri, USA. AD - Department of Biochemistry & Molecular Biophysics, Washington University, St. Louis, Missouri, USA. AD - Department of Molecular Microbiology, Washington University, St. Louis, Missouri, USA. FAU - Baldridge, Megan T AU - Baldridge MT AD - Department of Molecular Microbiology, Washington University, St. Louis, Missouri, USA. AD - Division of Infectious Diseases, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, USA. FAU - Randall, Glenn AU - Randall G AD - Department of Microbiology, The University of Chicago, Chicago, Illinois, USA. FAU - Hwang, Seungmin AU - Hwang S AUID- ORCID: 0000-0003-0846-5462 AD - Committee on Microbiology, The University of Chicago, Chicago, Illinois, USA shwang@vir.bio. AD - Department of Pathology, The University of Chicago, Chicago, Illinois, USA. LA - eng GR - R00 DK116666/DK/NIDDK NIH HHS/United States GR - R01 AI127518/AI/NIAID NIH HHS/United States GR - R01 AI127552/AI/NIAID NIH HHS/United States GR - T32 GM007183/GM/NIGMS NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural DEP - 20200817 PL - United States TA - J Virol JT - Journal of virology JID - 0113724 RN - 0 (CLM-1 protein, mouse) RN - 0 (Receptors, Immunologic) RN - 0 (Receptors, Virus) SB - IM MH - Animals MH - Binding Sites MH - Caliciviridae Infections/*virology MH - Disease Resistance/*genetics MH - Gastroenteritis/virology MH - Macrophages/virology MH - Mice MH - Mice, Inbred C57BL MH - Mice, Inbred Strains MH - Models, Molecular MH - Norovirus MH - *Polymorphism, Genetic MH - Protein Conformation MH - Receptors, Immunologic/chemistry/*genetics/*metabolism MH - Receptors, Virus/*genetics/*metabolism MH - Sequence Analysis, Protein MH - Virus Internalization PMC - PMC7431780 OTO - NOTNLM OT - CD300LF OT - I/LnJ OT - entry OT - norovirus OT - polymorphism OT - receptors EDAT- 2020/06/26 06:00 MHDA- 2020/12/01 06:00 PMCR- 2020/08/17 CRDT- 2020/06/26 06:00 PHST- 2020/05/04 00:00 [received] PHST- 2020/06/16 00:00 [accepted] PHST- 2020/06/26 06:00 [pubmed] PHST- 2020/12/01 06:00 [medline] PHST- 2020/06/26 06:00 [entrez] PHST- 2020/08/17 00:00 [pmc-release] AID - JVI.00837-20 [pii] AID - 00837-20 [pii] AID - 10.1128/JVI.00837-20 [doi] PST - epublish SO - J Virol. 2020 Aug 17;94(17):e00837-20. doi: 10.1128/JVI.00837-20. Print 2020 Aug 17.