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AliasesCXCR5, BLR1, CD185, MDR15, C-X-C motif chemokine receptor 5, C-X-C chemokine receptor type 5
External IDsOMIM: 601613 MGI: 103567 HomoloGene: 1298 GeneCards: CXCR5
Gene location (Human)
Chromosome 11 (human)
Chr.Chromosome 11 (human)[1]
Chromosome 11 (human)
Genomic location for CXCR5
Genomic location for CXCR5
Band11q23.3Start118,883,766 bp[1]
End118,897,799 bp[1]
RNA expression pattern
PBB GE BLR1 206126 at fs.png

PBB GE BLR1 216734 s at fs.png
More reference expression data
RefSeq (mRNA)



RefSeq (protein)



Location (UCSC)Chr 11: 118.88 – 118.9 MbChr 9: 44.51 – 44.56 Mb
PubMed search[3][4]
View/Edit HumanView/Edit Mouse

C-X-C chemokine receptor type 5 (CXC-R5) also known as CD185 (cluster of differentiation 185) or Burkitt lymphoma receptor 1 (BLR1) is a G protein-coupled seven transmembrane receptor for chemokine CXCL13 (also known as BLC) and belongs to the CXC chemokine receptor family. It enables T cells to migrate to lymph node B cell zones. In humans, the CXC-R5 protein is encoded by the CXCR5 gene.[5]

Tissue distribution and function[edit]

The BLR1 / CXCR5 gene is specifically expressed in Burkitt's lymphoma and lymphatic tissues, such as follicles in lymph nodes as well as in spleen. The gene plays an essential role in B cell migration.[6] Recently, it was shown that CXCR5 overexpression in breast cancer patients highly correlates with lymph node metastases,[7] and elevated CXCR5 expression may contribute to abnormal cell survival and migration in breast tumors that lack functional p53 protein.[8] Minor allele of SNP rs630923, located in the area of CXCR5 gene promoter and associated with the risk of multiple sclerosis, is responsible for appearance of MEF2C-binding site resulted in reduced CXCR5 gene promoter activity in B-cells during activation, that could lead to decreased autoimmune response [9]

CXCR5 has been shown to be expressed on both CD4[10] and CD8[11] T cells, though it is often regarded as the defining marker for T Follicular Helper (Tfh) cells[12].


  1. ^ a b c GRCh38: Ensembl release 89: ENSG00000160683 - Ensembl, May 2017
  2. ^ a b c GRCm38: Ensembl release 89: ENSMUSG00000047880 - Ensembl, May 2017
  3. ^ "Human PubMed Reference:".
  4. ^ "Mouse PubMed Reference:".
  5. ^ Dobner T, Wolf I, Emrich T, Lipp M (November 1992). "Differentiation-specific expression of a novel G protein-coupled receptor from Burkitt's lymphoma". European Journal of Immunology. 22 (11): 2795–9. doi:10.1002/eji.1830221107. PMID 1425907.
  6. ^ Förster R, Mattis AE, Kremmer E, Wolf E, Brem G, Lipp M (December 1996). "A putative chemokine receptor, BLR1, directs B cell migration to defined lymphoid organs and specific anatomic compartments of the spleen". Cell. 87 (6): 1037–47. doi:10.1016/S0092-8674(00)81798-5. PMID 8978608.
  7. ^ Biswas S, Sengupta S, Roy Chowdhury S, Jana S, Mandal G, Mandal PK, Saha N, Malhotra V, Gupta A, Kuprash DV, Bhattacharyya A (January 2014). "CXCL13-CXCR5 co-expression regulates epithelial to mesenchymal transition of breast cancer cells during lymph node metastasis". Breast Cancer Research and Treatment. 143 (2): 265–76. doi:10.1007/s10549-013-2811-8. PMID 24337540.
  8. ^ Mitkin NA, Hook CD, Schwartz AM, Biswas S, Kochetkov DV, Muratova AM, Afanasyeva MA, Kravchenko JE, Bhattacharyya A, Kuprash DV (March 2015). "p53-dependent expression of CXCR5 chemokine receptor in MCF-7 breast cancer cells". Scientific Reports. 5 (5): 9330. Bibcode:2015NatSR...5E9330M. doi:10.1038/srep09330. PMC 4365401. PMID 25786345.
  9. ^ Mitkin NA, Muratova AM, Schwartz AM, Kuprash DV (Nov 2016). "The A Allele of the Single-Nucleotide Polymorphism rs630923 Creates a Binding Site for MEF2C Resulting in Reduced CXCR5 Promoter Activity in B-Cell Lymphoblastic Cell Lines". Frontiers in Immunology. 7 (515): 515. doi:10.3389/fimmu.2016.00515. PMC 5112242. PMID 27909439.
  10. ^ Chevalier N, Jarrossay D, Ho E, Avery DT, Ma CS, Yu D, Sallusto F, Tangye SG, Mackay CR (May 2011). "CXCR5 expressing human central memory CD4 T cells and their relevance for humoral immune responses". Journal of Immunology. 186 (10): 5556–68. doi:10.4049/jimmunol.1002828. PMID 21471443.
  11. ^ He R, Hou S, Liu C, Zhang A, Bai Q, Han M, Yang Y, Wei G, Shen T, Yang X, Xu L, Chen X, Hao Y, Wang P, Zhu C, Ou J, Liang H, Ni T, Zhang X, Zhou X, Deng K, Chen Y, Luo Y, Xu J, Qi H, Wu Y, Ye L (August 2016). "Follicular CXCR5- expressing CD8(+) T cells curtail chronic viral infection". Nature. 537 (7620): 412–428. doi:10.1038/nature19317. PMID 27501245.
  12. ^ Moser B (2015). "CXCR5, the Defining Marker for Follicular B Helper T (TFH) Cells". Frontiers in Immunology. 6: 296. doi:10.3389/fimmu.2015.00296. PMC 4459225. PMID 26106395.

External links[edit]

Further reading[edit]