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https://www.readbyqxmd.com/read/27895918/classical-and-non-classical-hla-class-i-aberrations-in-primary-cervical-squamous-and-adenocarcinomas-and-paired-lymph-node-metastases
#1
Debbie M Ferns, A Marijne Heeren, Sanne Samuels, Maaike C G Bleeker, Tanja D de Gruijl, Gemma G Kenter, Ekaterina S Jordanova
BACKGROUND: Tumors avoid destruction by cytotoxic T cells (CTL) and natural killer (NK) cells by downregulation of classical human leukocyte antigens (HLA) and overexpression of non-classical HLA. This is the first study to investigate HLA expression in relation to histology (squamous cell carcinoma (SCC) vs. adenocarcinoma (AC)), clinicopathological parameters and survival in a large cervical cancer patient cohort. METHODS: Classical (HLA-A and HLA-B/C)- and non-classical HLA molecules (HLA-E and HLA-G) were studied on primary tumors and paired lymph node (LN) metastases from cervical cancer patients (n = 136) by immunohistochemistry...
2016: Journal for Immunotherapy of Cancer
https://www.readbyqxmd.com/read/27880031/increased-levels-of-plasma-soluble-human-leukocyte-antigen-g-in-persistent-wheezy-infants
#2
Fulya Tahan, Hatice Eke Gungor, Himmet Haluk Akar, Berkay Saraymen
BACKGROUND: Human leukocyte antigen (HLA)-G is a non-classical major histocompatibility complex (MHC) class I antigen characterized by limited polymorphism in its coding region, unique tissue expression pattern in physiologic conditions and immunomodulatory properties. Recently, many studies suggest that the levels of sHLA-G were higher in atopic asthma and allergic rhinitis (AR). However, this remains to be uncertain in wheezy infants. In the present study, it was aimed to determine sHLA-G levels in wheezy infants...
November 23, 2016: Pediatrics International: Official Journal of the Japan Pediatric Society
https://www.readbyqxmd.com/read/27859042/hla-g-promotes-myeloid-derived-suppressor-cell-mdsc-accumulation-and-suppressive-activity-during-human-pregnancy-through-engagement-of-the-receptor-ilt4
#3
Natascha Köstlin, Anna-Lena Ostermeir, Bärbel Spring, Julian Schwarz, Alexander Marmé, Christina B Walter, Christian F Poets, Christian Gille
Establishing and maintaining maternal-fetal tolerance is essential for a successful pregnancy; failure of immunological adaptation to pregnancy leads to severe complications such as abortion or preterm delivery. Myeloid-derived suppressor cells (MDSCs) are innate immune cells that suppress T-cell responses, expand during pregnancy and thus may play a role in tolerance induction. Human leucocyte antigen G (HLA-G) is a major histocompatibility complex (MHC) I molecule with immune-modulatory properties, which is expressed during pregnancy...
November 10, 2016: European Journal of Immunology
https://www.readbyqxmd.com/read/27835619/hla-g-hiv-1-specific-cd8-t-cells-are-associated-with-hiv-1-immune-control
#4
Selena Viganò, Jordi J Negrón, Samantha Tse, Fatema Z Chowdhury, Mathias Lichterfeld, Xu G Yu
OBJECTIVE(S): To assess the frequency and function of HIV-1-specific HLA-G CD8 T cells in HIV-1 controllers and progressors. DESIGN: We performed an observational cross-sectional cohort analysis in untreated (n = 47) and treated (n = 17) HIV-1 patients with different rates of disease progression and n = 14 healthy individuals. METHODS: We evaluated the frequency, the proportion and the function of total and virus-specific HLA-G CD8 T cells by tetramer or intracellular cytokine staining, followed by flow cytometric analysis...
November 9, 2016: AIDS
https://www.readbyqxmd.com/read/27833846/mesenchymal-stromal-cells-derived-from-whole-human-umbilical-cord-exhibit-similar-properties-to-those-derived-from-wharton-s-jelly-and-bone-marrow
#5
Claire Mennan, Sharon Brown, Helen McCarthy, Eleni Mavrogonatou, Dimitris Kletsas, John Garcia, Birender Balain, James Richardson, Sally Roberts
Mesenchymal stromal cells (MSC) can be isolated from several regions of human umbilical cords, including Wharton's jelly (WJ), artery, vein or cord lining. These MSC appear to be immune privileged and are promising candidates for cell therapy. However, isolating MSC from WJ, artery, vein or cord lining requires time-consuming tissue dissection. MSC can be obtained easily via briefly digesting complete segments of the umbilical cord, likely containing heterogenous or mixed populations of MSC (MC-MSC). MC-MSC are generally less well characterized than WJ-MSC, but nevertheless represent a potentially valuable population of MSC...
November 2016: FEBS Open Bio
https://www.readbyqxmd.com/read/27820781/inhibition-of-t-cell-alloreactivity-by-bronchial-epithelium-is-impaired-in-lung-transplant-recipients-through-pathways-involving-tgf-%C3%AE-il-10-and-hla-g
#6
C Dupin, E Lhuillier, S Létuvé, M Pretolani, G Thabut, H Mal, E D Carosella, C Schilte, P Mordant, V Bunel, C Danel, N Rouas-Freiss, O Brugière
BACKGROUND: Bronchiolitis obliterans syndrome (BOS) after lung transplantation (LTx) results from bronchial epithelial cell (BECs) damages, thought to be orchestrated by T cells primed by antigen-presenting cell (APC) presenting allo-antigens. In this cell cross-talk, BECs are also suspected to play a pivotal immunosuppressive role in T cell alloreactivity. We studied the immunomodulating role of BECs in a human ex-vivo model of allogeneic T cell response, both in healthy subjects and LTx recipients...
November 3, 2016: Transplantation
https://www.readbyqxmd.com/read/27812316/common-genetic-variants-found-in-hla-and-kir-immune-genes-in-autism-spectrum-disorder
#7
REVIEW
Anthony R Torres, Thayne L Sweeten, Randall C Johnson, Dennis Odell, Jonna B Westover, Patricia Bray-Ward, David C Ward, Christopher J Davies, Aaron J Thomas, Lisa A Croen, Michael Benson
The "common variant-common disease" hypothesis was proposed to explain diseases with strong inheritance. This model suggests that a genetic disease is the result of the combination of several common genetic variants. Common genetic variants are described as a 5% frequency differential between diseased vs. matched control populations. This theory was recently supported by an epidemiology paper stating that about 50% of genetic risk for autism resides in common variants. However, rare variants, rather than common variants, have been found in numerous genome wide genetic studies and many have concluded that the "common variant-common disease" hypothesis is incorrect...
2016: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/27806848/a-comparison-of-cancer-stem-cell-markers-and-nonclassical-major-histocompatibility-complex-antigens-in-colorectal-tumor-and-noncancerous-tissues
#8
Rabia Bilge Özgül Özdemir, Alper Tunga Özdemir, Fatih Oltulu, Kamile Kurt, Gürkan Yiğittürk, Cengiz Kırmaz
Colorectal carcinoma (CRC) is one of the most fatal types of cancer in both women and men, and, unfortunately, patients are often diagnosed at an advanced stage. Cancer stem cells (CSCs) are associated with poor prognosis, metastasis, and recurrence, as well as chemotherapy and radiotherapy resistance. Therefore, different treatment alternatives are needed to facilitate the elimination of CSCs. One such approach is immunotherapy; however, tumor cells can evade immune cells by alteration of the expression patterns of human leukocyte antigens (HLA)...
December 2016: Annals of Diagnostic Pathology
https://www.readbyqxmd.com/read/27800497/upregulation-of-soluble-hla-g-in-chronic-left-ventricular-systolic-dysfunction
#9
Line Lisbeth Olesen, Thomas Vauvert F Hviid
Left ventricular systolic dysfunction (LVSD) defined by ejection fraction (EF) <40% is common, serious but treatable, and correct diagnosis is the cornerstone of effective treatment. Biomarkers may help to diagnose LVSD and give insight into the pathophysiology. The immune system is activated in LVSD, and the immunomodulatory molecule human leukocyte antigen-G (HLA-G) may be involved. The primary aim was to measure soluble HLA-G (sHLA-G) in the blood in different stages of LVSD (<30% and 30-40%), in the midrange EF 40-50%, and in preserved EF ≥ 50% and to validate sHLA-G as a LVSD biomarker...
2016: Journal of Immunology Research
https://www.readbyqxmd.com/read/27797156/establishment-of-optimized-elisa-system-specific-for-hla-g-in-body-fluids
#10
N Ouji-Sageshima, D E Geraghty, A Ishitani, K Hatake, T Ito
Recently, human leukocyte antigen-G (HLA-G) has been a focus in the field of reproductive immunology, tumor progression and transplantation, because of its inhibitory function as ligand to the inhibitory receptors leukocyte immunoglobulin-like receptors (LILR) B1 and LILRB2. The HLA-G is expressed in distinct mRNA isoforms, one of which encodes a soluble HLA-G (sHLA-G) protein, detectable by sandwich ELISA. Therefore, sHLA-G ELISAs have been used as a noninvasive diagnosis system. While a number of sHLA-G-specific ELISAs have been described, our prior studies showed that data obtained by the conventional ELISA system detecting sHLA-G in body fluids was not consistent with the data obtained from immunoprecipitation (IP)/immunoblotting (IB)...
December 2016: HLA
https://www.readbyqxmd.com/read/27792840/maternal-genetic-polymorphisms-and-unexplained-recurrent-miscarriage-a-systematic-review-and-meta-analysis
#11
REVIEW
X Shi, X Xie, Y Jia, S Li
The roles of genetic polymorphisms in the pathogenesis of recurrent miscarriage (RM) have been intensively studied. However, the results of these studies were inconsistent, especially when conducted in different populations. Therefore, we performed the current study to systematically review the broad spectrum of genetic polymorphisms that were suspected to be involved in RM, and discussed potential genetic biomarkers of RM. Eligible articles were identified in PubMed, Medline, Embase and CNKI. Odd ratios (ORs) and 95% confidence intervals (CIs) were used to describe the strength of association, and a probability value (p value) of 0...
October 28, 2016: Clinical Genetics
https://www.readbyqxmd.com/read/27783105/high-efficiency-lysis-of-cervical-cancer-by-allogeneic-nk-cells-derived-from-umbilical-cord-progenitors-is-independent-of-hla-status
#12
John P Veluchamy, A Marijne Heeren, Jan Spanholtz, Jaap D H van Eendenburg, Daniëlle A M Heideman, Gemma G Kenter, Henk M Verheul, Hans J van der Vliet, Ekaterina S Jordanova, Tanja D de Gruijl
Down-regulation of HLA in tumor cells, low numbers and dysfunctionality of NK cells are commonly observed in patients with end-stage cervical cancer. Adoptive transfer of high numbers of cytotoxic NK cells might be a promising treatment approach in this setting. Here, we explored the cytotoxic efficacy on ten cervical cancer cell lines of activated allogeneic NK cells from two sources, i.e., peripheral blood (PBNK) with and without cetuximab (CET), a tumor-specific monoclonal antibody directed against EGFR, or derived from umbilical cord blood (UCB-NK)...
October 25, 2016: Cancer Immunology, Immunotherapy: CII
https://www.readbyqxmd.com/read/27778096/the-dimeric-form-of-hla-g-molecule-is-associated-with-the-response-of-early-rheumatoid-arthritis-era-patients-to-methotrexate
#13
Roberta Rizzo, Ilaria Farina, Daria Bortolotti, Elisa Galuppi, Melissa Padovan, Dario Di Luca, Marcello Govoni
A growing body of evidence indicates a possible involvement of HLA (human leukocyte antigen)-G antigens in rheumatoid arthritis (RA), mainly in the HLA-G dimeric isoform, the most active HLA-G form with the strongest immunosuppression, that showed an excellent anti-inflammatory effect in collagen-induced arthritis model mice. However, the relevance of HLA-G dimers in RA response to methotrexate (MTX) treatment is still unknown. We analyzed the HLA-G dimers' amount in plasma samples from early rheumatoid arthritis (ERA) patients before MTX therapy and evaluated the role of these molecules as biomarker of the different response to the treatment...
October 24, 2016: Clinical Rheumatology
https://www.readbyqxmd.com/read/27771469/the-association-between-functional-hla-g-14bp-insertion-deletion-and-3142-c-g-polymorphisms-and-susceptibility-to-multiple-sclerosis
#14
Nadia Ben Fredj, Kaouthar Sakly, Daria Bortolotti, Mouna Aissi, Mahbouba Frih-Ayed, Antonella Rotola, Elisabetta Caselli, Franscesca Cura, Nabil Sakly, Mahjoub Aouni, Dario Di Luca, Roberta Rizzo
We aimed to investigate two main polymorphisms in the 3' untranslated region (3'UTR) of the HLA-G gene [14bp insertion/deletion (INS/DEL) and +3142 C>G] and to assess their impact on the soluble HLA-G (sHLA-G) production in patients with multiple sclerosis (MS). This study included 60 patients with relasping-remitting (RR) MS and 112 healthy donors (HD). Mutations were identified by PCR and PCR-RFLP, and serum sHLA-G quantification was performed by ELISA. For the 14bp INS/DEL polymorphism, variants frequencies were similar in patients and controls, whereas a significant increased frequency of the +3142 G allele was found in MS patients compared to HD (63...
October 19, 2016: Immunology Letters
https://www.readbyqxmd.com/read/27757202/evaluation-of-soluble-human-leukocyte-antigen-g-in-peripheral-blood-of-pregnant-women-with-gestational-diabetes-mellitus
#15
Saeide-Sadat Shobeiri, Saeid Abediankenari, Bahareh Lashtoo-Aghaee, Zahra Rahmani, Bahareh Esmaeili-Gorji
BACKGROUND: Research says that diabetes may develop in over 10% of non-diabetic pregnant women. Diabetes which generally occurs late in second trimester and third trimester of pregnancy, it is called gestational diabetes. Overweight or suffering from obesity before pregnancy is type 2 diabetes risk factor. In most cases, diabetic symptoms disappear after delivery. HLA-G has an important role both in mother and fetus tolerance during pregnancy, it may also be effective in the protection of pancreatic islet cells...
2016: Caspian Journal of Internal Medicine
https://www.readbyqxmd.com/read/27748859/human-parvovirus-b19-antibodies-induce-altered-membrane-protein-expression-and-apoptosis-of-bewo-trophoblasts
#16
Bor-Show Tzang, Szu-Yi Chiang, Hsu-Chin Chan, Chung-Hsien Liu, Tsai-Ching Hsu
Human parvovirus B19 (B19) is harmful during pregnancy since it can be vertically transmitted to the developing fetus. In addition, the anti‑B19 antibodies induced by B19 infection are believed to have a cytopathic role in B19 transmission; however, knowledge regarding the effects of anti‑B19 antibodies during pregnancy is limited. To investigate the possible roles of anti‑B19 antibodies during pregnancy, the present study examined the effects of anti‑B19‑VP1 unique region (VP1u), anti‑B19‑VP2 and anti‑B19‑nonstructural protein 1 (NS1) immunoglobulin G (IgG) antibodies on BeWo trophoblasts...
November 2016: Molecular Medicine Reports
https://www.readbyqxmd.com/read/27708209/pd1-pd1l-pathway-hla-g-and-t-regulatory-cells-as-new-markers-of-immunosuppression-in-cancers
#17
Paulina Własiuk, Maciej Putowski, Krzysztof Giannopoulos
The appropriate function of the immune system depends on the effective regulation of the immune response on multiple levels. The key element of an effective immune response to antigenic stimulation is maintaining a homeostasis between activation and inhibitory function of immunocompetent cells and molecules. In pathological conditions such as chronic infections, autoimmune diseases or cancer there are significant alterations, and prevalence of signals of one type over another. Main markers of these dysfunctions are altered expressions of molecules, such as programmed death-1 (PD-1), Human Leukocyte Antigen G (HLA-G), or changed percentages of T regulatory cells (Treg)...
October 4, 2016: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/27706615/hla-g-genetic-variants-and-hepatocellular-carcinoma-a-meta-analysis
#18
A V C Coelho, R R Moura, S Crovella, F Celsi
Human leukocyte antigen (HLA)-G is a key tolerogenic molecule mainly expressed in the placenta and is crucial for implantation of the embryo and immunological tolerance of the fetus during pregnancy. However, under pathological conditions, such as cancer or viral infections, HLA-G can be expressed in other tissues. The gene coding for HLA-G (HLA-G, chromosome 6p21.3) presents numerous polymorphisms, some of them influencing its expression. One of the most studied, is the 14 bp ins/del (rs371194629) situated at the 3'-UTR of the gene...
August 26, 2016: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/27701438/association-of-hla-a-and-non-classical-hla-class-i-alleles
#19
Federico Carlini, Virginia Ferreira, Stéphane Buhler, Audrey Tous, Jean-François Eliaou, Céline René, Jacques Chiaroni, Christophe Picard, Julie Di Cristofaro
The HLA-A locus is surrounded by HLA class Ib genes: HLA-E, HLA-H, HLA-G and HLA-F. HLA class Ib molecules are involved in immuno-modulation with a central role for HLA-G and HLA-E, an emerging role for HLA-F and a yet unknown function for HLA-H. Thus, the principal objective of this study was to describe the main allelic associations between HLA-A and HLA-H, -G, -F and -E. Therefore, HLA-A, -E, -G, -H and -F coding polymorphisms, as well as HLA-G UnTranslated Region haplotypes (referred to as HLA-G UTRs), were explored in 191 voluntary blood donors...
2016: PloS One
https://www.readbyqxmd.com/read/27699182/study-of-soluble-hla-g-in-congenital-human-cytomegalovirus-infection
#20
Roberta Rizzo, Liliana Gabrielli, Daria Bortolotti, Valentina Gentili, Giulia Piccirilli, Angela Chiereghin, Claudia Pavia, Silvia Bolzani, Brunella Guerra, Giuliana Simonazzi, Francesca Cervi, Maria Grazia Capretti, Enrico Fainardi, Dario Di Luca, Maria Paola Landini, Tiziana Lazzarotto
Human leukocyte antigen-G (HLA-G) is a nonclassical HLA class I antigen that is expressed during pregnancy contributing to maternal-fetal tolerance. HLA-G can be expressed as membrane-bound and soluble forms. HLA-G expression increases strongly during viral infections such as congenital human cytomegalovirus (HCMV) infections, with functional consequences in immunoregulation. In this work we investigated the expression of soluble (s)HLA-G and beta-2 microglobulin (component of HLA) molecules in correlation with the risk of transmission and severity of congenital HCMV infection...
2016: Journal of Immunology Research
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