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Polymorphism and immunosuppression

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https://www.readbyqxmd.com/read/29212248/impact-of-complement-component-3-4-5-single-nucleotide-polymorphisms-on-renal-transplant-recipients-with-antibody-mediated-rejection
#1
Zijie Wang, Haiwei Yang, Miao Guo, Zhijian Han, Jun Tao, Hao Chen, Yuqiu Ge, Ke Wang, Ruoyun Tan, Ji-Fu Wei, Min Gu
Antibody-mediated rejection (ABMR) is an important risk of allograft dysfunction in kidney transplantation. The complement system is considered to be associated with the generation of alloreative antibodies and donor-specific antibodies. However, the association of complement single nucleotide polymorphisms (SNPs) with ABMR still remained unclear. Blood samples of 199 renal transplant recipients containing 68 with ABMR and 131 with stable graft function were collected, and analyzed by next-generation sequencing with an established gene panel...
November 7, 2017: Oncotarget
https://www.readbyqxmd.com/read/29146215/-acute-methotrexate-related-neurotoxicity-and-pseudo-stroke-syndrome
#2
V Deneux, N Leboucq, L Saumet, S Haouy, T Akbaraly, N Sirvent
Treatment of acute lymphoblastic leukemia requires high-dose systemic and/or intrathecal methotrexate to prevent and/or treat central nervous system disorders. Acute neurotoxicity of methotrexate, of unknown etiopathogenesis, is characterized by the polymorphism of clinical manifestations, responsible for a potentially harmful diagnostic delay in these immunosuppressed patients. We describe five episodes of transient acute leukoencephalopathy mimicking a stroke, reported in the literature as "pseudo-stroke syndrome"...
November 13, 2017: Archives de Pédiatrie: Organe Officiel de la Sociéte Française de Pédiatrie
https://www.readbyqxmd.com/read/29142307/genetic-polymorphism-related-to-monocyte-macrophage-function-is-associated-with-graft-versus-host-disease
#3
Kati Hyvärinen, Jarmo Ritari, Satu Koskela, Riitta Niittyvuopio, Anne Nihtinen, Liisa Volin, David Gallardo, Jukka Partanen
Despite detailed human leukocyte antigen (HLA) matching and modern immunosuppressive therapy, severe graft-versus-host disease (GvHD) remains a major hurdle for successful allogeneic hematopoietic stem cell transplantation (HSCT). As the genetic diversity in GvHD complicates the systematic discovery of associated variants across populations, we studied 122 GvHD-associated single nucleotide polymorphisms (SNPs) in 492 HLA-matched sibling HSCT donor-recipient pairs from Finland and Spain. The association between these candidate SNPs and grade III-IV acute GvHD and extensive chronic GvHD was assessed...
November 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29140561/interaction-among-smoking-status-single-nucleotide-polymorphisms-and-markers-of-systemic-inflammation-in-healthy-individuals
#4
Thitiya Luetragoon, Lars Erik Rutqvist, Orathai Tangvarasittichai, Bengt-Åke Andersson, Sture Löfgren, Kanchana Usuwanthim, Nongnit Laytragoon Lewin
Cigarette smoke contains toxic and carcinogenic substances that contribute to the development of cancer and various diseases. Genetic variation might be important because not all smokers develop smoking-related disease. The current study addressed the possible interactions among selected single nucleotide polymorphisms (SNPs) in genes related to systemic inflammation, smoking status, the levels of circulating immune response cells and plasma biomarkers of systemic inflammation. Sixty-four healthy blood donors were recruited, of whom 31 were current smokers and 33 were never-users of tobacco products, references...
November 15, 2017: Immunology
https://www.readbyqxmd.com/read/29113092/recipient-hla-g-3142-cc-genotype-and-concentrations-of-soluble-hla-g-impact-on-occurrence-of-cmv-infection-after-living-donor-kidney-transplantation
#5
Hana Guberina, Rafael Tomoya Michita, Sebastian Dolff, Anja Bienholz, Mirko Trilling, Falko M Heinemann, Peter A Horn, Andreas Kribben, Oliver Witzke, Vera Rebmann
The expression modulation of the immunosuppressive non-classical Human leukocyte antigen-G (HLA-G) molecule and its soluble isoforms is an immune evasion strategy being deployed by cytomegalovirus (CMV). The +3142 C>G single nucleotide polymorphism (SNP) located within the 3' untranslated region (3'UTR) is of crucial importance for the regulation of HLA-G expression. Therefore, we analyzed the influence of the +3142 C>G HLA-G SNP on the occurrence of CMV infection in a cohort of 178 living-donor kidney recipients and their 178 corresponding donors...
November 5, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29103109/polymorphisms-of-nucleotide-factor-of-activated-t-cells-cytoplasmic-2-and-4-and-the-risk-of-acute-rejection-following-kidney-transplantation
#6
Zijie Wang, Haiwei Yang, Shuhui Si, Zhijian Han, Jun Tao, Hao Chen, Yuqiu Ge, Miao Guo, Ke Wang, Ruoyun Tan, Ji-Fu Wei, Min Gu
BACKGROUND: Acute rejection (AR) is a common complication of kidney transplantation. Nuclear factors of activated T cells (NFATs) are transcription factors involved in the activation of T lymphocytes, but their association with AR is unclear. METHODS: This retrospective, case-control study included 200 renal transplant recipients who were divided into the AR group (n = 69) and stable group (n = 131). Their blood samples were collected, and DNA was extracted from the whole blood...
November 4, 2017: World Journal of Urology
https://www.readbyqxmd.com/read/29101067/foxp3-rs3761549-polymorphism-predicts-long-term-renal-allograft-function-in-patients-receiving-cyclosporine-based-immunosuppressive-regimen
#7
Qin-Xia Xu, Xiao-Yan Qiu, Zheng Jiao, Ming Zhang, Ming-Kang Zhong
AIM: The present study was conducted to determine the effect of FOXP3 single nucleotide polymorphisms (SNPs) on clinical outcomes in CsA-treated renal transplant patients. METHODS: A total of 166 renal transplant patients with at least 5years of follow-up were included. SNPs of FOXP3 gene (rs3761547, rs3761548, rs3761549, rs2232365 and rs2280883) were detected by Taqman probe technique. The associations of SNPs with acute rejection, CsA-induced nephrotoxicity, pneumonia and post-transplantation estimated glomerular filtration rate (eGFR) were explored...
October 31, 2017: Gene
https://www.readbyqxmd.com/read/29067976/combination-of-interleukin-10-gene-promoter-polymorphisms-with-hla-drb1-15-allele-is-associated-with-multiple-sclerosis
#8
Majid Shahbazi, Javad Sadeghi Allah Abadi, Danial Roshandel, Maryam Koochaki, Hosein Amiri, Rahim Kohansal, Seied Mohammad Baghbanian, Mahdi Zamani
BACKGROUND & OBJECTIVES: Multiple sclerosis (MS) is common in some ethnic groups. Interleukin-10 (IL-10) is a potent anti-inflammatory and immunosuppressive cytokine that may be an important regulator in MS disease pathogenesis. IL-10 promoter includes several single nucleotide polymorphisms and the level of IL-10 expression is related to these polymorphisms. Furthermore, loci within the histocompatibility regions are responsible for susceptibility to MS. The aim of this study was to investigate the association of IL-10 gene promoter polymorphisms and HLA-DRB1*15 allele frequencies with MS susceptibility in an Iranian population...
June 2017: Indian Journal of Medical Research
https://www.readbyqxmd.com/read/29061159/genetic-polymorphisms-of-hla-dp-and-isolated-anti-hbc-are-important-subsets-of-occult-hepatitis-b-infection-in-indonesian-blood-donors-a-case-control-study
#9
Yan Mardian, Yoshihiko Yano, Widya Wasityastuti, Neneng Ratnasari, Yujiao Liang, Wahyu Aristyaning Putri, Teguh Triyono, Yoshitake Hayashi
BACKGROUND: Occult hepatitis B infection (OBI) is defined as the presence of hepatitis B virus (HBV) DNA in the serum and/or liver in HBsAg-negative individuals. OBI is associated with the risk of viral transmission, especially in developing countries, and with progressive liver disease and reactivation in immunosuppressive patients. The objective of this study was to evaluate the relation of OBI to HLA-DP single nucleotide polymorphisms (SNPs) encoding antigen-binding sites for the immune response to HBV infection...
October 23, 2017: Virology Journal
https://www.readbyqxmd.com/read/29061057/analysis-of-hla-g-gene-polymorphisms-in-slovak-women-with-pre-eclampsia
#10
V Durmanova, J Drobny, I Shawkatova, J Dlhopolcek, M Bucova
OBJECTIVES: To identify possible association between the selected HLA-G gene polymorphisms and risk of pre-eclampsia. BACKGROUND: Pre-eclampsia is a serious multisystem disorder that affects women during pregnancy. Despite many research studies, the pathology of pre-eclampsia is not fully understood. Human leukocyte antigen G (HLA-G) belongs to the molecules that induce fetal acceptance by the maternal immune system. HLA-G expression was found to be impaired in the women suffering from pre-eclampsia suggesting its involvement in the development of pre-eclampsia...
2017: Bratislavské Lekárske Listy
https://www.readbyqxmd.com/read/29050534/low-copy-numbers-of-complement-c4-and-homozygous-deficiency-of-c4a-may-predispose-to-severe-disease-and-earlier-disease-onset-in-patients-with-systemic-lupus-erythematosus
#11
M Jüptner, F Flachsbart, A Caliebe, W Lieb, S Schreiber, R Zeuner, A Franke, J O Schröder
Objectives Low copy numbers and deletion of complement C4 genes are potent risk factors for systemic lupus erythematosus (SLE). However, it is not known whether this genetic association affects the clinical outcome. We investigated C4 copy number variation and its relationship to clinical and serological features in a Northern European lupus cohort. Methods We genotyped the C4 gene locus using polymerase chain reaction (PCR)-based TaqMan assays in 169 patients with SLE classified according to the 1997 revised American College of Rheumatology (ACR) criteria and in 520 matched controls...
January 1, 2017: Lupus
https://www.readbyqxmd.com/read/29021921/post-transplant-lymphoproliferative-disorder-ptld-single-institutional-experience-of-141-patients
#12
Rohit Bishnoi, Ravneet Bajwa, Aaron J Franke, William Paul Skelton, Yu Wang, Niraj M Patel, William Birdsall Slayton, Fei Zou, Nam H Dang
BACKGROUND: Post-transplant lymphoproliferative disorder is a well-recognized but rare complication of hematopoietic stem cell and solid organ transplant. Due to rarity of this disease, retrospective studies from major transplant centers has been the main source to provide treatment guidelines, which are still in evolution. The sample size of this study is among one of the largest study on PTLD till date reported throughout the world. METHODS: This study was performed at University of Florida which is one of the largest transplant center in South East United States...
2017: Experimental Hematology & Oncology
https://www.readbyqxmd.com/read/28965162/germline-polymorphisms-in-myeloid-associated-genes-are-not-associated-with-survival-in-glioma-patients
#13
Daniel I Jacobs, Yanhong Liu, Konrad Gabrusiewicz, Spiridon Tsavachidis, Georgina N Armstrong, Renke Zhou, Jun Wei, Cristina Ivan, George Calin, Annette M Molinaro, Terri Rice, Paige M Bracci, Helen M Hansen, John K Wiencke, Margaret R Wrensch, Amy B Heimberger, Melissa L Bondy
Immune cells of myeloid origin, including microglia, macrophages, and myeloid-derived suppressor cells adopt immunosuppressive phenotypes that support gliomagenesis. Here, we tested an a priori hypothesis that single nucleotide polymorphisms (SNPs) in genes related to glioma-associated myeloid cell regulation and function are also associated with patient survival after glioma diagnosis. Subjects for this study were 992 glioma patients treated at The University of Texas MD Anderson Cancer Center in Houston, Texas between 1992 and 2008...
September 30, 2017: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/28875890/new-onset-diabetes-after-transplant-incidence-risk-factors-and-outcome
#14
S C Alagbe, A Voster, R Ramesar, C R Swanepoel
BACKGROUND: The outcome of renal transplantation depends on achieving effective immunosuppression while minimising the consequences of such treatment. The occurrence of new-onset diabetes in the post-transplant period has been associated with several risk factors including some immunosuppressive medication. Better understanding of the clinical and genetic risk factors associated with new-onset diabetes after transplant (NODAT) could enable risk stratification of patients in the pre-transplant period, with the goal of applying measures that will reduce the incidence...
August 25, 2017: South African Medical Journal, Suid-Afrikaanse Tydskrif Vir Geneeskunde
https://www.readbyqxmd.com/read/28868093/on-the-cellular-and-molecular-mechanisms-of-drug-induced-gingival-overgrowth
#15
Albert Ramírez-Rámiz, Lluís Brunet-LLobet, Eduard Lahor-Soler, Jaume Miranda-Rius
INTRODUCTION: Gingival overgrowth has been linked to multiple factors such as adverse drug effects, inflammation, neoplastic processes, and hereditary gingival fibromatosis. Drug-induced gingival overgrowth is a well-established adverse event. In early stages, this gingival enlargement is usually located in the area of the interdental papilla. Histologically, there is an increase in the different components of the extracellular matrix. OBJECTIVE: The aim of this manuscript is to describe and analyze the different cellular and molecular agents involved in the pathogenesis of Drug-induced gingival overgrowth...
2017: Open Dentistry Journal
https://www.readbyqxmd.com/read/28836585/population-pharmacokinetics-and-bayesian-estimation-of-mycophenolic-acid-concentrations-in-chinese-adult-renal-transplant-recipients
#16
Zi-Cheng Yu, Pei-Jun Zhou, Xiang-Hui Wang, Bressolle Françoise, Da Xu, Wei-Xia Zhang, Bing Chen
Mycophenolate mofetil (MMF) is an important immunosuppressant used in renal transplantation, and mycophenolic acid (MPA) is the active component released from the ester prodrug MMF. The objective of this study was to investigate the population pharmacokinetics of mycophenolic acid (MPA) following oral administration of MMF in Chinese adult renal transplant recipients and to identify factors that explain MPA pharmacokinetic variability. Pharmacokinetic data for MPA and covariate information were retrospectively collected from 118 patients (79 patients were assigned to the group for building the population pharmacokinetic model, while 39 patients were assigned to the validation group)...
November 2017: Acta Pharmacologica Sinica
https://www.readbyqxmd.com/read/28833329/population-pharmacokinetics-and-bayesian-estimation-of-tacrolimus-exposure-in-chinese-liver-transplant-patients
#17
B Chen, H-Q Shi, X-X Liu, W-X Zhang, J-Q Lu, B-M Xu, H Chen
WHAT IS KNOWN AND OBJECTIVES: Tacrolimus (TAC) is widely used as part of immunosuppressive regimens. There is great interindividual variation on the disposition of TAC. The aim of this study was to develop a population pharmacokinetic (PPK) model for Chinese liver transplant patients and evaluate genetic polymorphism and other possible factors on the PK parameters. The exposure of TAC is to be estimated through Bayesian modelling. METHODS: A total of 47 sets of rich-time PK and 1234 conventional therapeutic drug monitoring (TDM) data were collected from 125 Chinese liver transplant patients...
August 17, 2017: Journal of Clinical Pharmacy and Therapeutics
https://www.readbyqxmd.com/read/28814524/mutation-of-the-putative-immunosuppressive-domain-of-the-retroviral-envelope-glycoprotein-compromises-infectivity
#18
Urszula Eksmond, Bryony Jenkins, Julia Merkenschlager, Walther Mothes, Jonathan P Stoye, George Kassiotis
The envelope glycoprotein of diverse endogenous and exogenous retroviruses is considered inherently immunosuppressive. Extensive work mapped the immunosuppressive activity to a highly conserved domain, termed the immunosuppressive domain (ISD), in the transmembrane (TM) subunit of the envelope glycoprotein and identified two naturally polymorphic key residues that afford immunosuppressive activity to distinct envelope glycoproteins. Concurrent mutation of these two key residues (E14R and A20F) in the envelope glycoprotein of the Friend murine leukemia virus (F-MLV) ISD has been reported to abolish its immunosuppressive activity, without affecting its fusogenicity, and to weaken the ability of the virus to replicate specifically in immunocompetent hosts...
November 1, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28805741/alcohol-and-cancer-mechanisms-and-therapies
#19
REVIEW
Anuradha Ratna, Pranoti Mandrekar
Several scientific and clinical studies have shown an association between chronic alcohol consumption and the occurrence of cancer in humans. The mechanism for alcohol-induced carcinogenesis has not been fully understood, although plausible events include genotoxic effects of acetaldehyde, cytochrome P450 2E1 (CYP2E1)-mediated generation of reactive oxygen species, aberrant metabolism of folate and retinoids, increased estrogen, and genetic polymorphisms. Here, we summarize the impact of alcohol drinking on the risk of cancer development and potential underlying molecular mechanisms...
August 14, 2017: Biomolecules
https://www.readbyqxmd.com/read/28780426/characterization-of-oseltamivir-resistant-influenza-virus-populations-in-immunosuppressed-patients-using-digital-droplet-pcr-comparison-with-qpcr-and-next-generation-sequencing-analysis
#20
Maxime Pichon, Alexandre Gaymard, Laurence Josset, Martine Valette, Gilles Millat, Bruno Lina, Vanessa Escuret
INTRODUCTION: The H275Y substitution in neuraminidase (NA) confers oseltamivir-resistance in A(H1N1) influenza viruses (IV). Droplet digital PCR (ddPCR) is a new technique to explore single nucleotide polymorphisms. The aim of this study was to compare the performances of reverse transcriptase (RT)-ddPCR, RT-qPCR and next generation sequencing (NGS). We also analyzed the proportions of H275Y-NA substitution for two immunosuppressed patients with sustained shedding of A(H1N1)pdm09 IV. METHODS: RT-qPCR was performed using the ABI7500 platform...
August 3, 2017: Antiviral Research
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