Article · Wikipedia archive · Last revised Jun 12, 2026

IGSF8

Immunoglobulin superfamily member 8 is a protein that in humans is encoded by the IGSF8 gene. IGSF8 has also been designated as CD316. IGSF8 is an innate immune checkpoint that inhibits the cytotoxic activity of natural killer (NK) cells. IGSF8 acts by binding to the Killer Ig-like Receptor KIR3DL2. IGSF8 is frequently overexpressed relative to normal tissues in many cancers, included melanoma, urothelial carcinoma, and breast cancer, and has been proposed as a potential therapeutic target in gliomas. In normal tissues, IGSF8 is highly expressed in the brain, where it may contribute to the immune privilege of the central nervous system.

Last revised
Jun 12, 2026
Read time
≈ 4 min
Length
870 w
Citations
18
Source
IGSF8
Identifiers
AliasesIGSF8, CD316, CD81P3, EWI-2, EWI2, KCT-4, LIR-D1, PGRL, immunoglobulin superfamily member 8
External IDsOMIM: 606644; MGI: 2154090; HomoloGene: 14163; GeneCards: IGSF8; OMA:IGSF8 - orthologs
Orthologs
SpeciesHumanMouse
Entrez
Ensembl
UniProt
RefSeq (mRNA)

NM_001206665
NM_052868
NM_001320247

NM_080419

RefSeq (protein)

NP_001193594
NP_001307176
NP_443100

NP_536344

Location (UCSC)Chr 1: 160.09 – 160.1 MbChr 1: 172.09 – 172.15 Mb
PubMed search34
Wikidata
View/Edit HumanView/Edit Mouse

Immunoglobulin superfamily member 8 is a protein that in humans is encoded by the IGSF8 gene.567 IGSF8 has also been designated as CD316 (cluster of differentiation 316). IGSF8 is an innate immune checkpoint that inhibits the cytotoxic activity of natural killer (NK) cells.8 IGSF8 acts by binding to the Killer Ig-like Receptor KIR3DL2 (or, in mice, the analogous Klra9 receptor).8 IGSF8 is frequently overexpressed relative to normal tissues in many cancers, included melanoma, urothelial carcinoma, and breast cancer,8 and has been proposed as a potential therapeutic target in gliomas.9 In normal tissues, IGSF8 is highly expressed in the brain, where it may contribute to the immune privilege of the central nervous system.8

Cancer biomarker

In gliomas, IGSF8 is strongly correlated with tumor grade and is a potential prognostic marker.9 IGSF8 is enriched on ovarian cancer-derived extracellular vesicles and is a potential biomarker for the early detection of high grade serous ovarian cancer.10

References

References

  1. GRCh38: Ensembl release 89: ENSG00000162729Ensembl, May 2017
  2. GRCm38: Ensembl release 89: ENSMUSG00000038034Ensembl, May 2017
  3. "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  4. "Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  5. Stipp CS, Kolesnikova TV, Hemler ME (Oct 2001). "EWI-2 is a major CD9 and CD81 partner and member of a novel Ig protein subfamily". J Biol Chem. 276 (44): 40545–40554. doi:10.1074/jbc.M107338200. PMID 11504738.
  6. Clark KL, Zeng Z, Langford AL, Bowen SM, Todd SC (Oct 2001). "PGRL is a major CD81-associated protein on lymphocytes and distinguishes a new family of cell surface proteins". J Immunol. 167 (9): 5115–5121. doi:10.4049/jimmunol.167.9.5115. PMID 11673522.
  7. "Entrez Gene: IGSF8 immunoglobulin superfamily, member 8".
  8. Li Y, Wu X, Sheng C, Liu H, Liu H, Tang Y, et al. (May 2024). "IGSF8 is an innate immune checkpoint and cancer immunotherapy target". Cell. 187 (11): 2703–2716.e23. doi:10.1016/j.cell.2024.03.039. ISSN 0092-8674. PMID 38657602.
  9. Ren J, Huang P, Wang F (September 2024). "IGSF8 is a potential target for the treatment of gliomas". Asian Journal of Surgery. 47 (9): 3883–3891. doi:10.1016/j.asjsur.2024.02.118. PMID 38453613.
  10. Trinidad CV, Pathak HB, Cheng S, Tzeng S, Madan R, Sardiu ME, et al. (2023-10-26). "Lineage specific extracellular vesicle-associated protein biomarkers for the early detection of high grade serous ovarian cancer". Scientific Reports. 13 (1) 18341. Bibcode:2023NatSR..1318341T. doi:10.1038/s41598-023-44050-5. ISSN 2045-2322. PMC 10603107. PMID 37884576.
Further reading

Further reading

External links