Introduction: Human leukocyte antigen G (HLA-G) is a non-classical major histocompatibility complex (MHC) class Ib antigen characterized by a limited polymorphism. The expression of HLA-G at immune privileged sites an...Introduction: Human leukocyte antigen G (HLA-G) is a non-classical major histocompatibility complex (MHC) class Ib antigen characterized by a limited polymorphism. The expression of HLA-G at immune privileged sites and its ability to inhibit the effectors functions of immune cells has set HLA-G as a molecule of immune tolerance. This expression pattern is unique among HLA genes and suggests that HLA-G may be involved in interactions that are critical in establishing and/or maintaining pregnancy. Methods: Soluble HLA-G (sHLA-G) levels were measured using a BioVendor sHLA-G ELISA kit following the manufacturer’s protocol. The study participants include women undergoing spontaneous abortion, non-pregnant women, males and an archive sample of women who had normal vaginal deliveries without any complications and any history of malaria infection from gestation to delivery. Results: Soluble HLA-G levels were higher among women undergoing spontaneous abortion as compared to women who had normal vaginal delivery and non-pregnant women. Soluble HLA-G levels were also higher in second trimester as compared to first trimester in both women who had spontaneous abortions and women who had normal delivery. Conclusion: Although sHLA-G levels were higher among women undergoing spontaneous abortion as compared to non-pregnant women and women who had normal delivery, this may be playing a role in the maintenance of maternal immune tolerance to fetal antigen, since plasma sHLA-G levels increased with increasing trimester in both women who had normal delivery and women undergoing spontaneous abortion.展开更多
Colorectal cancer(CRC)is one of the most diffuse cancers worldwide and is still a clinical burden.Increasing evidences associate CRC clinical outcome to immune contexture represented by adaptive immune cells.Their typ...Colorectal cancer(CRC)is one of the most diffuse cancers worldwide and is still a clinical burden.Increasing evidences associate CRC clinical outcome to immune contexture represented by adaptive immune cells.Their type,density and location are summarized in the Immune Score that has been shown to improve prognostic prediction of CRC patients.The non-classical MHC class?Ⅰ?human leukocyte antigen-G(HLA-G),is a crucial tumor-driven immune escape molecule involved in immune tolerance.HLA-G and soluble counterparts are able to exert inhibitory functions by direct interactions with inhibitory receptors present on both innate cells such as natural killer cells,and adaptive immune cells as cytotoxic T and B lymphocytes.HLA-G may play a prominent role in CRC strategies to avoid host immunosurveillance.This review highlights the current knowledge on HLA-G contribution in CRC,in related inflammatory dis-eases and in other type of cancers and disorders.HLA-G genetic setting(specific haplotypes,genotypes and alleles frequencies)and association with circulating/soluble profiles was highlighted.HLA G prognostic and predictive value in CRC was investigated in order to define a novel prognostic immune biomarker in CRC.展开更多
文摘Introduction: Human leukocyte antigen G (HLA-G) is a non-classical major histocompatibility complex (MHC) class Ib antigen characterized by a limited polymorphism. The expression of HLA-G at immune privileged sites and its ability to inhibit the effectors functions of immune cells has set HLA-G as a molecule of immune tolerance. This expression pattern is unique among HLA genes and suggests that HLA-G may be involved in interactions that are critical in establishing and/or maintaining pregnancy. Methods: Soluble HLA-G (sHLA-G) levels were measured using a BioVendor sHLA-G ELISA kit following the manufacturer’s protocol. The study participants include women undergoing spontaneous abortion, non-pregnant women, males and an archive sample of women who had normal vaginal deliveries without any complications and any history of malaria infection from gestation to delivery. Results: Soluble HLA-G levels were higher among women undergoing spontaneous abortion as compared to women who had normal vaginal delivery and non-pregnant women. Soluble HLA-G levels were also higher in second trimester as compared to first trimester in both women who had spontaneous abortions and women who had normal delivery. Conclusion: Although sHLA-G levels were higher among women undergoing spontaneous abortion as compared to non-pregnant women and women who had normal delivery, this may be playing a role in the maintenance of maternal immune tolerance to fetal antigen, since plasma sHLA-G levels increased with increasing trimester in both women who had normal delivery and women undergoing spontaneous abortion.
基金Supported by Associazione Italiana per la Ricerca sul Cancro(AIRC),Special Program Molecular Clinical Oncology,5X1000,No.12214(G.T.)European Research Council,Programme‘‘Ide-as’’,Proposal No.269051(G.T.,F.R.)
文摘Colorectal cancer(CRC)is one of the most diffuse cancers worldwide and is still a clinical burden.Increasing evidences associate CRC clinical outcome to immune contexture represented by adaptive immune cells.Their type,density and location are summarized in the Immune Score that has been shown to improve prognostic prediction of CRC patients.The non-classical MHC class?Ⅰ?human leukocyte antigen-G(HLA-G),is a crucial tumor-driven immune escape molecule involved in immune tolerance.HLA-G and soluble counterparts are able to exert inhibitory functions by direct interactions with inhibitory receptors present on both innate cells such as natural killer cells,and adaptive immune cells as cytotoxic T and B lymphocytes.HLA-G may play a prominent role in CRC strategies to avoid host immunosurveillance.This review highlights the current knowledge on HLA-G contribution in CRC,in related inflammatory dis-eases and in other type of cancers and disorders.HLA-G genetic setting(specific haplotypes,genotypes and alleles frequencies)and association with circulating/soluble profiles was highlighted.HLA G prognostic and predictive value in CRC was investigated in order to define a novel prognostic immune biomarker in CRC.
