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https://www.readbyqxmd.com/read/28293391/gestational-diabetes-leads-to-down-regulation-of-cdk4-prb-e2f1-pathway-genes-in-pancreatic-islets-of-rat-offspring
#1
Zahra Nazari, Mohammad Nabiuni, Mohsen Saeidi, Mohammad Jafar Golalipour
OBJECTIVES: The link between a hyperglycemic intrauterine environment and the development of diabetes later in life has been observed in offspring exposed to gestational diabetes mellitus (GDM), but the underlying mechanisms for this phenomenon are still not clear. Reduced β-cells mass is a determinant in the development of diabetes (type 1 and type 2 diabetes). Some recent studies have provided evidence that the CDK4-pRB-E2F1 regulatory pathway is involved in β-cells proliferation...
February 2017: Iranian Journal of Basic Medical Sciences
https://www.readbyqxmd.com/read/28288868/inhibition-of-kir4-1-potassium-channels-by-quinacrine
#2
Leticia G Marmolejo-Murillo, Iván A Aréchiga-Figueroa, Meng Cui, Eloy G Moreno-Galindo, Ricardo A Navarro-Polanco, José A Sánchez-Chapula, Tania Ferrer, Aldo A Rodríguez Menchaca
Inwardly rectifying potassium (Kir) channels are expressed in many cell types and contribute to a wide range of physiological processes. Particularly, Kir4.1 channels are involved in the astroglial spatial potassium buffering. In this work, we examined the effects of the cationic amphiphilic drug quinacrine on Kir4.1 channels heterologously expressed in HEK293 cells, employing the patch clamp technique. Quinacrine inhibited the currents of Kir4.1 channels in a concentration and voltage dependent manner. In inside-out patches, quinacrine inhibited Kir4...
March 10, 2017: Brain Research
https://www.readbyqxmd.com/read/28202613/the-activating-human-nk-cell-receptor-kir2ds2-recognizes-a-%C3%AE-2-microglobulin-independent-ligand-on-cancer-cells
#3
Lavanya Thiruchelvam-Kyle, Sigurd E Hoelsbrekken, Per C Saether, Elisabeth Gyllensten Bjørnsen, Daniela Pende, Sigbjørn Fossum, Michael R Daws, Erik Dissen
The functions of activating members of the killer cell Ig-like receptor (KIR) family are not fully understood, as the ligands for these receptors are largely unidentified. In this study, we report that KIR2DS2 reporter cells recognize a ligand expressed by cancer cell lines. All cancer targets recognized by KIR2DS2 were also recognized by KIR2DL2 and KIR2DL3 reporters. Trogocytosis of membrane proteins from the cancer targets was observed with responding reporter cells, indicating the formation of KIR2DS2 ligand-specific immunological synapses...
April 1, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28196473/2-7-million-samples-genotyped-for-hla-by-next-generation-sequencing-lessons-learned
#4
Gerhard Schöfl, Kathrin Lang, Philipp Quenzel, Irina Böhme, Jürgen Sauter, Jan A Hofmann, Julia Pingel, Alexander H Schmidt, Vinzenz Lange
BACKGROUND: At the DKMS Life Science Lab, Next Generation Sequencing (NGS) has been used for ultra-high-volume high-resolution genotyping of HLA loci for the last three and a half years. Here, we report on our experiences in genotyping the HLA, CCR5, ABO, RHD and KIR genes using a direct amplicon sequencing approach on Illumina MiSeq and HiSeq 2500 instruments. RESULTS: Between January 2013 and June 2016, 2,714,110 samples largely from German, Polish and UK-based potential stem cell donors have been processed...
February 14, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28188495/cancer-treatment-and-the-kir-hla-system-an-overview
#5
REVIEW
Patrizia Leone, Valli De Re, Angelo Vacca, Franco Dammacco, Vito Racanelli
Accumulating evidence indicates that the success of cancer therapy depends not only on a combination of adequate procedures (surgery, chemotherapy and radiotherapy) that aim to eliminate all tumor cells, but also on the functional state of the host immune system. HLA and KIR molecules, in particular, are critical to the interactions between tumor cells and both innate and adaptive immune cells such as NK cells and T cells. Different KIR-HLA gene combinations as well as different HLA expression levels on tumor cells associate with variable tumor prognosis and response to treatment...
February 10, 2017: Clinical and Experimental Medicine
https://www.readbyqxmd.com/read/28186594/-association-of-genetic-polymorphisms-of-kir-hla-system-with-chronic-myeloid-leukemia-among-ethnic-hans-from-southern-china
#6
Zhihui Deng, Jianxin Zhen, Daming Wang, Liumei He, Hongyan Zou
OBJECTIVE: To explore the association of KIR-HLA gene polymorphism with chronic myeloid leukemia (CML) among ethnic Hans from southern China. METHODS: A total of 172 adult CML patients and 480 unrelated healthy controls were screened for the presence of KIR with sequence-specific primers-PCR (PCR-SSP) and sequence-based typing (SBT) of HLA-A, -B and -C loci. Polymorphisms of the KIR-HLA system were analyzed at 4 levels, and the frequencies of KIR framework genes and KIR profiles, classⅠHLA ligands, matched KIR+HLA pairs and KIR-HLA compound profile were compared between the two groups...
February 10, 2017: Zhonghua Yi Xue Yi Chuan Xue za Zhi, Zhonghua Yixue Yichuanxue Zazhi, Chinese Journal of Medical Genetics
https://www.readbyqxmd.com/read/28186587/-genetic-polymorphisms-of-kir2ds4-gene-among-ethnic-hans-from-southern-china
#7
Jianxin Zhen, Guobin Zhang, Qiong Yu, Liumei He, Yunping Xu, Hongyan Zou, Zhihui Deng
OBJECTIVE: To study genetic polymorphisms of the KIR2DS4 gene among ethnic Hans from southern China. METHODS: Genomic DNA was isolated from 306 unrelated individuals and amplified with KIR2DS4-specific PCR primers. KIR2DS4-positive samples were genotyped for the entire coding sequence by sequencing-based typing (SBT). Assignment of allelic genotypes was accomplished by using Assign 3.5 software. For samples with inconclusive SBT results, RT-PCR products covering the entire coding sequence of the KIR2DS4 gene were subjected to cloning and haplotype sequencing...
February 10, 2017: Zhonghua Yi Xue Yi Chuan Xue za Zhi, Zhonghua Yixue Yichuanxue Zazhi, Chinese Journal of Medical Genetics
https://www.readbyqxmd.com/read/28167030/cloning-and-characterization-of-sidhn-a-novel-dehydrin-gene-from-saussurea-involucrata-kar-et-kir-that-enhances-cold-and-drought-tolerance-in-tobacco
#8
Xinyong Guo, Li Zhang, Jianbo Zhu, Hongling Liu, Aiying Wang
Saussurea involucrata Kar. et Kir. is a hardy, dicotyledonous plant featured by strong tolerance to severe stress conditions. In a previous study, we created a cDNA library to characterize genetic factors associated with the cold acclimation response of S. involucrata. The full-length cDNA of one dehydrin-like gene, SiDHN, was obtained by RT-PCR and the SiDHN gene was further characterized in this study. The full-length SiDHN cDNA consists of 703 base pairs (bp) with a 333bp open reading frame encoding a protein comprising 111 amino acid residues...
March 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/28055112/identification-of-human-memory-like-nk-cells
#9
Elena I Kovalenko, Maria A Streltsova, Leonid M Kanevskiy, Sophia A Erokhina, William G Telford
Our understanding of NK biology is increased dramatically, a product of improved flow-cytometric techniques for analyzing these cells. NK cells undergo significant changes in repertoire during differentiation. A repeating stimulus, such as a cytomegalovirus infection, may result in accumulation of certain types of highly differentiated NK cells designated as memory-like, or adaptive NK cells. Adaptive NK cells are capable of rapid expansion and effective response to the recall stimulus. These cells differ significantly from conventional NK cells both functionally and phenotypically...
January 5, 2017: Current Protocols in Cytometry
https://www.readbyqxmd.com/read/28003788/multimodal-imaging-of-membranoproliferative-glomerulonephritis-type-ii
#10
Zafer Cebeci, Serife Bayraktar, Merih Oray, Nur Kir
To report the fundus findings on multimodal imaging of a membranoproliferative glomerulonephritis type II (MPGNII) patient. A 41-year-old woman had a medical history of renal transplantation for MPGNII 5 years prior to presentation to our clinic for ophthalmic examination. Fundus examination showed macular retinal pigment epithelial changes and large peripapillary atrophy in the right eye, and yellowish bilateral drusen-like deposits peripherally. Fundus fluorescein angiography and indocyanine green angiography revealed multifocal hyperfluorescence in the peripheral retina with accompanying deposits...
October 2016: Saudi Journal of Ophthalmology: Official Journal of the Saudi Ophthalmological Society
https://www.readbyqxmd.com/read/27998801/the-impact-of-kir2ds4-gene-on-clinical-outcome-after-hematopoietic-stem-cell-transplantation
#11
Marija Burek Kamenaric, Katarina Stingl Jankovic, Zorana Grubic, Ranka Serventi Seiwerth, Marija Maskalan, Damir Nemet, Mirta Mikulic, Renata Zunec
Killer cell immunoglobulin-like receptors (KIR) are a family of inhibitory/activating receptors expressed on NK cells. Interactions of KIR receptors with KIR ligands have been shown to modify hematopoietic stem cell transplantation (HSCT) outcome. The aim of this research was to determine the KIR2DS4 allele variants distribution among 111 patients with different hematological malignancy who underwent HSCT and their donors, and to evaluate KIR2DS4 alleles' impact on HSCT outcome. The KIR gene frequency analysis showed a significantly higher incidence of full-length KIR2DS4 alleles among patients...
February 2017: Human Immunology
https://www.readbyqxmd.com/read/27994592/kir-genes-and-their-ligands-predict-the-response-to-anti-egfr-monoclonal-antibodies-in-solid-tumors
#12
Cristina Morales-Estevez, Juan De la Haba-Rodriguez, Barbara Manzanares-Martin, Ignacio Porras-Quintela, Antonio Rodriguez-Ariza, Alberto Moreno-Vega, Maria J Ortiz-Morales, Maria A Gomez-España, Maria T Cano-Osuna, Javier Lopez-Gonzalez, Beatriz Chia-Delgado, Rafael Gonzalez-Fernandez, Enrique Aranda-Aguilar
Killer-cell immunoglobulin-like receptors (KIRs) regulate the killing function of natural killer cells, which play an important role in the antibody-dependent cell-mediated cytotoxicity response exerted by therapeutic monoclonal antibodies (mAbs). However, it is unknown whether the extensive genetic variability of KIR genes and/or their human leukocyte antigen (HLA) ligands might influence the response to these treatments. This study aimed to explore whether the variability in KIR/HLA genes may be associated with the variable response observed to mAbs based anti-epidermal growth factor receptor (EGFR) therapies...
2016: Frontiers in Immunology
https://www.readbyqxmd.com/read/27984624/-progress-in-research-on-genetic-polymorphisms-and-sequence-based-typing-of-kir-genes
#13
Jianxin Zhen, Qiong Yu
Killer cell immunoglobulin-like receptors (KIRs) are members of the immunoglobulin superfamily expressed on natural killer (NK) cells and a subset of T cells. Given the receptor-ligand relationship between certain KIR and human leukocyte antigen (HLA) classⅠmolecules, the KIRs are involved in the regulation of NK cell activation through conveying activating or inhibitory signals, which plays an important role in immunities involved in transplantation, tumor, infection as well as autoimmune diseases. This paper has provided a review for the research on KIR gene polymorphisms and summarized the characteristics of the sequence-based typing method for KIR genes...
December 10, 2016: Zhonghua Yi Xue Yi Chuan Xue za Zhi, Zhonghua Yixue Yichuanxue Zazhi, Chinese Journal of Medical Genetics
https://www.readbyqxmd.com/read/27984603/-a-strategy-to-clarify-ambiguities-during-genotyping-of-functional-kir-framework-genes-by-sequencing-based-typing-among-ethnic-hans-from-southern-china
#14
Guobin Zhang, Zhihui Deng
OBJECTIVE: To categorize ambiguous allelic combinations encountered in genotyping of functional KIR genes by sequencing-based typing of the entire coding sequence and develop an efficient approach to identify such ambiguities. METHODS: Fourteen KIR functional framework genes from 306 ethnic Chinese individuals were genotyped for the entire encoding sequence. The number of ambiguities was directly counted. Based on the differences within each ambiguous allelic combination, group-specific PCR primers and sequencing primers for amplifying the target allelic sequence were designed...
December 10, 2016: Zhonghua Yi Xue Yi Chuan Xue za Zhi, Zhonghua Yixue Yichuanxue Zazhi, Chinese Journal of Medical Genetics
https://www.readbyqxmd.com/read/27936197/vascular-tone-regulation-induced-by-c-type-natriuretic-peptide-differences-in-endothelium-dependent-and-independent-mechanisms-involved-in-normotensive-and-spontaneously-hypertensive-rats
#15
Carolina Caniffi, Flavia M Cerniello, María N Gobetto, María L Sueiro, María A Costa, Cristina Arranz
Given that the role of C-type natriuretic peptide (CNP) in the regulation of vascular tone in hypertensive states is unclear, we hypothesized that impaired response of the nitric oxide system to CNP in spontaneously hypertensive rats (SHR) could affect vascular relaxation induced by the peptide in this model of hypertension, and that other endothelial systems or potassium channels opening could also be involved. We examined the effect of CNP on isolated SHR aortas, and the hindlimb vascular resistance (HVR) in response to CNP administration compared to normotensive rats...
2016: PloS One
https://www.readbyqxmd.com/read/27932143/report-from-the-first-and-second-spanish-killer-immunoglobulin-like-receptor-genotyping-workshops-external-quality-control-for-natural-killer-alloreactive-donor-selection-in-haploidentical-stem-cell-transplantation
#16
D Planelles, C Vilches, F González-Escribano, M Muro, R González-Fernández, F Sánchez, J Gonzalo Ocejo, A Eiras, J L Caro, E Palou, J A Campillo, M D de Juan, O Montes, A Balas, L Marín, A Torío, M Fernández-Arquero, C González-Roiz, A López-Vázquez, E Cisneros, C Abad-Molina, R López, M L Abad-Alastruey, C Serra, A M García-Alonso, J L Vicario
An important factor affecting the success in the setting of related haploidentical hematopoietic stem cell transplantation (HSCT) is the graft-versus-leukemia effect mediated by natural killer (NK) cells when the donor displays NK alloreactivity versus the recipient. NK cell function is regulated by killer immunoglobulin-like receptors (KIR) and it has been described that donor KIR genotype influences transplantation outcome. This has led to a requirement of laboratories to have a quality assurance program for validation and control of their KIR genotyping methods...
November 2016: Transplantation Proceedings
https://www.readbyqxmd.com/read/27899419/progressive-cl-channel-defects-reveal-disrupted-skeletal-muscle-maturation-in-r6-2-huntington-s-mice
#17
Daniel R Miranda, Monica Wong, Shannon H Romer, Cynthia McKee, Gabriela Garza-Vasquez, Alyssa C Medina, Volker Bahn, Andrew D Steele, Robert J Talmadge, Andrew A Voss
Huntington's disease (HD) patients suffer from progressive and debilitating motor dysfunction. Previously, we discovered reduced skeletal muscle chloride channel (ClC-1) currents, inwardly rectifying potassium (Kir) channel currents, and membrane capacitance in R6/2 transgenic HD mice. The ClC-1 loss-of-function correlated with increased aberrant mRNA processing and decreased levels of full-length ClC-1 mRNA (Clcn1 gene). Physiologically, the resulting muscle hyperexcitability may help explain involuntary contractions of HD...
January 2017: Journal of General Physiology
https://www.readbyqxmd.com/read/27893413/kir-2d-l1-l3-l4-s4-and-kir-3dl1-protein-expression-in-non-small-cell-lung-cancer
#18
Yayi He, Paul A Bunn, Caicun Zhou, Dan Chan
BACKGROUND: Nature killer (NK) cells are the immune system's first line of defense against both viral infections and tumors. Killer cell immunoglobulin-like receptors (KIRs) are associated with susceptibility to different types of cancers. We investigated KIR 2D (L1, L3, L4, S4) and KIR 3DL1 protein expression and their association with survival in non-small cell lung cancer (NSCLC). METHODS: The expression of KIR 2D (L1, L3, L4, S4) (BC032422/ ADQ31987/ NP_002246/ NP_036446, ABCAM) and KIR 3DL1 (AA 1-444, ABCAM) protein was assessed by immunohistochemistry (IHC) in 62 NSCLC patients...
December 13, 2016: Oncotarget
https://www.readbyqxmd.com/read/27890259/how-important-is-nk-alloreactivity-and-kir-in-allogeneic-transplantation
#19
REVIEW
Brian C Shaffer, Katharine C Hsu
Relapse of acute myelogenous leukemia (AML) after allogeneic hematopoietic cell transplantation (allo HCT) is a major cause of death in transplant recipients. Efforts to control relapse by promoting donor T-cell alloreactivity, such as withdrawal of immune suppression or donor lymphocyte infusions, are limited by the propensity to induce graft versus host disease (GVHD) and by inadequate efficacy. Therefore, options for AML patients who have relapsed AML after allo HCT are few and outcomes are poor. Similar to T-cells, natural killer (NK) cells have potent anti-leukemia effector capacity, and yet unlike T-cells, NK cells do not mediate GVHD...
December 2016: Best Practice & Research. Clinical Haematology
https://www.readbyqxmd.com/read/27879459/clinical-and-epidemiological-features-of-paederus-dermatitis-among-nut-farm-workers-in-turkey
#20
Emel Uzunoğlu, Isıl Deniz Oguz, Busra Kir, Cihangir Akdemir
Paederus dermatitis is an acute irritant dermatitis resulting from contact with the hemolymph of Paederus beetles. This dermatitis mimics other infectious skin disorders, often resulting in diagnostic dilemmas. This study of 46 patients was conducted to increase awareness about Paederus dermatitis. Possible causes of a number of cases of Paederus dermatitis in Giresun, Turkey, were investigated using climate data and telephone interviews with the patients about risk factors. Insects caught by patients were identified at the species level...
February 8, 2017: American Journal of Tropical Medicine and Hygiene
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