Galectin-9 was first time isolated from mouse embryonic kidney in 1997 as a 36 kDa beta-galactoside lectin protein.[1] Human galectin-9 is encoded by the LGALS9gene.[2][3]
The protein has N- and C- terminal carbohydrate-binding domains connected by a link peptide. Multiple alternatively spliced transcript variants have been found for this gene.[3]
Galectin-9 is one of the most studied ligand for HAVCR2 (TIM-3) and is expressed on various tumor cells. However, it can also interact with other proteins (CLEC7A,[4]CD137,[5]CD40[6]). For example, an interaction with CD40 on T-cells induced their proliferation inhibition and cell death.
Clinical significance
The expression of galectin-9 has been detected on various hematological malignancies, such as CLL,[7] MDS,[8] Hodgkin and Non-Hodgkin lymphomas,[9] AML[10] or solid tumors, such as lung cancer,[11] breast cancer,[12] and hepatocellular carcinoma.[13]
HAVCR2/ galectin-9 interaction attenuated T-cell expansion and effectors function in tumor microenviroment and chronic infections.[14][10] Moreover, galectin-9 contributed to tumorigenesis by tumor cell transformation, cell-cycle regulation, angiogenesis, and cell adhesion.[15] The correlative studies analyzing the expression of galectin-9 and malignant clinical features showed controversial results. This can be explained as that galectin-9 can promote tumor immune escape as well as inhibit metastasis by promoting endothelial adhesion.[13] Therefore many factors such as tumor type, stage, and the involvement of different galectins should be take into consideration when correlating the expression level and the malignancy.
References
↑Wada J, Kanwar YS (February 1997). "Identification and characterization of galectin-9, a novel beta-galactoside-binding mammalian lectin". The Journal of Biological Chemistry. 272 (9): 6078–86. PMID9038233.
↑Türeci O, Schmitt H, Fadle N, Pfreundschuh M, Sahin U (March 1997). "Molecular definition of a novel human galectin which is immunogenic in patients with Hodgkin's disease". The Journal of Biological Chemistry. 272 (10): 6416–22. doi:10.1074/jbc.272.10.6416. PMID9045665.
↑Makishi S, Okudaira T, Ishikawa C, Sawada S, Watanabe T, Hirashima M, Sunakawa H, Mori N (August 2008). "A modified version of galectin-9 induces cell cycle arrest and apoptosis of Burkitt and Hodgkin lymphoma cells". British Journal of Haematology. 142 (4): 583–94. doi:10.1111/j.1365-2141.2008.07229.x. PMID18503581.
↑Gao J, Qiu X, Li X, Fan H, Zhang F, Lv T, Song Y (February 2018). "Expression profiles and clinical value of plasma exosomal Tim-3 and Galectin-9 in non-small cell lung cancer". Biochemical and Biophysical Research Communications. doi:10.1016/j.bbrc.2018.02.114. PMID29452091.
↑Irie A, Yamauchi A, Kontani K, Kihara M, Liu D, Shirato Y, Seki M, Nishi N, Nakamura T, Yokomise H, Hirashima M (April 2005). "Galectin-9 as a prognostic factor with antimetastatic potential in breast cancer". Clinical Cancer Research. 11 (8): 2962–8. doi:10.1158/1078-0432.CCR-04-0861. PMID15837748.
↑ 13.013.1Zhang ZY, Dong JH, Chen YW, Wang XQ, Li CH, Wang J, Wang GQ, Li HL, Wang XD (2012). "Galectin-9 acts as a prognostic factor with antimetastatic potential in hepatocellular carcinoma". Asian Pacific Journal of Cancer Prevention. 13 (6): 2503–9. PMID22938412.
↑Liu FT (April 2005). "Regulatory roles of galectins in the immune response". International Archives of Allergy and Immunology. 136 (4): 385–400. doi:10.1159/000084545. PMID15775687.
Further reading
Hirashima M, Kashio Y, Nishi N, Yamauchi A, Imaizumi TA, Kageshita T, Saita N, Nakamura T (2004). "Galectin-9 in physiological and pathological conditions". Glycoconjugate Journal. 19 (7–9): 593–600. doi:10.1023/B:GLYC.0000014090.63206.2f. PMID14758084.
Maruyama K, Sugano S (January 1994). "Oligo-capping: a simple method to replace the cap structure of eukaryotic mRNAs with oligoribonucleotides". Gene. 138 (1–2): 171–4. doi:10.1016/0378-1119(94)90802-8. PMID8125298.
Suzuki Y, Yoshitomo-Nakagawa K, Maruyama K, Suyama A, Sugano S (October 1997). "Construction and characterization of a full length-enriched and a 5'-end-enriched cDNA library". Gene. 200 (1–2): 149–56. doi:10.1016/S0378-1119(97)00411-3. PMID9373149.
Matsumoto R, Matsumoto H, Seki M, Hata M, Asano Y, Kanegasaki S, Stevens RL, Hirashima M (July 1998). "Human ecalectin, a variant of human galectin-9, is a novel eosinophil chemoattractant produced by T lymphocytes". The Journal of Biological Chemistry. 273 (27): 16976–84. doi:10.1074/jbc.273.27.16976. PMID9642261.
Matsumoto R, Hirashima M, Kita H, Gleich GJ (February 2002). "Biological activities of ecalectin: a novel eosinophil-activating factor". Journal of Immunology. 168 (4): 1961–7. doi:10.4049/jimmunol.168.4.1961. PMID11823532.
Kageshita T, Kashio Y, Yamauchi A, Seki M, Abedin MJ, Nishi N, Shoji H, Nakamura T, Ono T, Hirashima M (June 2002). "Possible role of galectin-9 in cell aggregation and apoptosis of human melanoma cell lines and its clinical significance". International Journal of Cancer. 99 (6): 809–16. doi:10.1002/ijc.10436. PMID12115481.
Imaizumi T, Kumagai M, Sasaki N, Kurotaki H, Mori F, Seki M, Nishi N, Fujimoto K, Tanji K, Shibata T, Tamo W, Matsumiya T, Yoshida H, Cui XF, Takanashi S, Hanada K, Okumura K, Yagihashi S, Wakabayashi K, Nakamura T, Hirashima M, Satoh K (September 2002). "Interferon-gamma stimulates the expression of galectin-9 in cultured human endothelial cells". Journal of Leukocyte Biology. 72 (3): 486–91. PMID12223516.
Asakura H, Kashio Y, Nakamura K, Seki M, Dai S, Shirato Y, Abedin MJ, Yoshida N, Nishi N, Imaizumi T, Saita N, Toyama Y, Takashima H, Nakamura T, Ohkawa M, Hirashima M (November 2002). "Selective eosinophil adhesion to fibroblast via IFN-gamma-induced galectin-9". Journal of Immunology. 169 (10): 5912–8. doi:10.4049/jimmunol.169.10.5912. PMID12421975.
Kashio Y, Nakamura K, Abedin MJ, Seki M, Nishi N, Yoshida N, Nakamura T, Hirashima M (April 2003). "Galectin-9 induces apoptosis through the calcium-calpain-caspase-1 pathway". Journal of Immunology. 170 (7): 3631–6. doi:10.4049/jimmunol.170.7.3631. PMID12646627.
Abedin MJ, Kashio Y, Seki M, Nakamura K, Hirashima M (May 2003). "Potential roles of galectins in myeloid differentiation into three different lineages". Journal of Leukocyte Biology. 73 (5): 650–6. doi:10.1189/jlb.0402163. PMID12714580.
Matsuda A, Suzuki Y, Honda G, Muramatsu S, Matsuzaki O, Nagano Y, Doi T, Shimotohno K, Harada T, Nishida E, Hayashi H, Sugano S (May 2003). "Large-scale identification and characterization of human genes that activate NF-kappaB and MAPK signaling pathways". Oncogene. 22 (21): 3307–18. doi:10.1038/sj.onc.1206406. PMID12761501.
Irie A, Yamauchi A, Kontani K, Kihara M, Liu D, Shirato Y, Seki M, Nishi N, Nakamura T, Yokomise H, Hirashima M (April 2005). "Galectin-9 as a prognostic factor with antimetastatic potential in breast cancer". Clinical Cancer Research. 11 (8): 2962–8. doi:10.1158/1078-0432.CCR-04-0861. PMID15837748.
Kasamatsu A, Uzawa K, Nakashima D, Koike H, Shiiba M, Bukawa H, Yokoe H, Tanzawa H (August 2005). "Galectin-9 as a regulator of cellular adhesion in human oral squamous cell carcinoma cell lines". International Journal of Molecular Medicine. 16 (2): 269–73. doi:10.3892/ijmm.16.2.269. PMID16012760.
Dai SY, Nakagawa R, Itoh A, Murakami H, Kashio Y, Abe H, Katoh S, Kontani K, Kihara M, Zhang SL, Hata T, Nakamura T, Yamauchi A, Hirashima M (September 2005). "Galectin-9 induces maturation of human monocyte-derived dendritic cells". Journal of Immunology. 175 (5): 2974–81. doi:10.4049/jimmunol.175.5.2974. PMID16116184.
Zhu C, Anderson AC, Schubart A, Xiong H, Imitola J, Khoury SJ, Zheng XX, Strom TB, Kuchroo VK (December 2005). "The Tim-3 ligand galectin-9 negatively regulates T helper type 1 immunity". Nature Immunology. 6 (12): 1245–52. doi:10.1038/ni1271. PMID16286920.
van de Weyer PS, Muehlfeit M, Klose C, Bonventre JV, Walz G, Kuehn EW (December 2006). "A highly conserved tyrosine of Tim-3 is phosphorylated upon stimulation by its ligand galectin-9". Biochemical and Biophysical Research Communications. 351 (2): 571–6. doi:10.1016/j.bbrc.2006.10.079. PMID17069754.