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Bruton's agammaglobulinemia

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https://www.readbyqxmd.com/read/28754963/transcriptome-profiling-of-monocytes-from-xla-patients-revealed-the-innate-immune-function-dysregulation-due-to-the-btk-gene-expression-deficiency
#1
Hoda Mirsafian, Adiratna Mat Ripen, Wai-Mun Leong, Chai Teng Chear, Saharuddin Bin Mohamad, Amir Feisal Merican
X-linked agammaglobulinemia (XLA) is a rare genetic disorder, caused by mutations in BTK (Bruton's Tyrosine Kinase) gene. Deep high-throughput RNA sequencing (RNA-Seq) approach was utilized to explore the possible differences in transcriptome profiles of primary monocytes in XLA patients compared with healthy subjects. Our analysis revealed the differences in expression of 1,827 protein-coding genes, 95 annotated long non-coding RNAs (lncRNAs) and 20 novel lincRNAs between XLA patients and healthy subjects...
July 28, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28361711/receptor-guided-3d-qsar-studies-molecular-dynamics-simulation-and-free-energy-calculations-of-btk-kinase-inhibitors
#2
Pavithra K Balasubramanian, Anand Balupuri, Hee-Young Kang, Seung Joo Cho
BACKGROUND: Bruton tyrosine kinase (Btk) plays an important role in B-cell development, differentiation, and signaling. It is also found be in involved in male immunodeficiency disease such as X-linked agammaglobulinemia (XLA). Btk is considered as a potential therapeutic target for treating autoimmune diseases and hematological malignancies. RESULTS: In this work, a combined molecular modeling study was performed on a series of thieno [3,2-c] pyridine-4-amine derivatives as Btk inhibitors...
March 14, 2017: BMC Systems Biology
https://www.readbyqxmd.com/read/28304004/x-linked-agammaglobulinemia-first-case-with-bruton-tyrosine-kinase-mutation-from-pakistan
#3
Samreen Kulsom Zaidi, Sonia Qureshi, Farah Naz Qamar
X-linked agammaglobulinemia (XLA) is a primary immunodeficiency with more than 600 mutations in Bruton tyrosine kinase (Bkt) gene which are responsible for early-onset agammaglobulinemia and repeated infections. Herein we present a case of a 3-year-old boy with history of repeated diarrhoea and an episode of meningoencephalitis with hemiplegia. The workup showed extremely low levels of immunoglobulin with low CD+19 cells. Genetic analysis showed Btk mutation 18 c.1883delCp.T628fs. To the best of our knowledge this is the first report of a case of XLA confirmed by molecular technique from Pakistan...
March 2017: JPMA. the Journal of the Pakistan Medical Association
https://www.readbyqxmd.com/read/28216434/human-nacht-lrr-and-pyd-domain-containing-protein-3-nlrp3-inflammasome-activity-is-regulated-by-and-potentially-targetable-through-bruton-tyrosine-kinase
#4
Xiao Liu, Tica Pichulik, Olaf-Oliver Wolz, Truong-Minh Dang, Andrea Stutz, Carly Dillen, Magno Delmiro Garcia, Helene Kraus, Sabine Dickhöfer, Ellen Daiber, Lisa Münzenmayer, Silke Wahl, Nikolaus Rieber, Jasmin Kümmerle-Deschner, Amir Yazdi, Mirita Franz-Wachtel, Boris Macek, Markus Radsak, Sebastian Vogel, Berit Schulte, Juliane Sarah Walz, Dominik Hartl, Eicke Latz, Stephan Stilgenbauer, Bodo Grimbacher, Lloyd Miller, Cornelia Brunner, Christiane Wolz, Alexander N R Weber
BACKGROUND: The Nod-like receptor NACHT, LRR, and PYD domain-containing protein 3 (NLRP3) and Bruton tyrosine kinase (BTK) are protagonists in innate and adaptive immunity, respectively. NLRP3 senses exogenous and endogenous insults, leading to inflammasome activation, which occurs spontaneously in patients with Muckle-Wells syndrome; BTK mutations cause the genetic immunodeficiency X-linked agammaglobulinemia (XLA). However, to date, few proteins that regulate NLRP3 inflammasome activity in human primary immune cells have been identified, and clinically promising pharmacologic targeting strategies remain elusive...
October 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28018445/a-novel-btk-gene-mutation-c-82delc-p-arg28-alafs-5-in-a-korean-family-with-x-linked-agammaglobulinemia
#5
Jeongeun Lee, Minhee Rhee, Taek Ki Min, Hae In Bang, Mi-Ae Jang, Eun-Suk Kang, Hee-Jin Kim, Hyeon-Jong Yang, Bok Yang Pyun
X-linked agammaglobulinemia (XLA) is a hereditary humoral immunodeficiency that results from Bruton's tyrosine kinase (BTK) gene mutations. These mutations cause defects in B-cell development, resulting in the virtual absence of these lymphocytes from the peripheral circulation. Consequently, this absence leads to a profound deficiency of lg all isotypes, and an increased susceptibility to encapsulated bacterial infections. A 15-month-old Korean boy presented with recurrent sinusitis and otitis media after 6 months of age, and had a family history of 2 maternal uncles with XLA...
November 2016: Korean Journal of Pediatrics
https://www.readbyqxmd.com/read/27867589/bruton-s-agammaglobulinemia-in-an-adult-male-due-to-a-novel-mutation-a-case-report
#6
Yuanda Xu, Qi Qing, Xuesong Liu, Sibei Chen, Ziyi Chen, Xuefeng Niu, Yaxia Tan, Weiqun He, Xiaoqing Liu, Yimin Li, Rongchang Chen, Ling Chen
X-linked agammaglobulinemia (XLA) is caused by mutation in the gene coding for Bruton's tyrosine kinase (BTK), which impairs peripheral B cell maturation and hypogammaglobulinemia. In this report, we present a case of XLA in a 22-year-old adult male. Genetic testing revealed a novel mutation located at the conserved region (c.383T>C). The patient had a history of recurrent respiratory tract infection which eventually progressed to chronic type II respiratory failure. Several pathogenic bacteria were isolated on culture of respiratory secretions obtained on bronchoscopy...
October 2016: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/27795213/-clinic-of-humoral-primary-immunodeficiencies-in-adults-experience-in-a-tertiary-hospital
#7
Julio César Cambray-Gutiérrez, Diana Andrea Herrera-Sánchez, Lizbeth Blancas-Galicia, Patricia María O'Farrill-Romanillos
BACKGROUND: Primary immunodeficiencies (PID) are characterized by alteration of the components of the immune system. Humoral deficiencies represent 50%. The most common are selective IgA deficiency, Bruton agammaglobulinemia, and common variable immunodeficiency (CVID). OBJECTIVE: To describe the epidemiological and clinical characteristics of adults with humoral PID, cared for in a Primary Humoral Immunodeficiencies Clinic. METHODS: A descriptive cross-sectional study that included a year of analysis, including 35 patients with humoral PID, 31 with CVID, and 4 with Bruton agammaglobulinemia...
October 2016: Revista Alergia Mexico: Organo Oficial de la Sociedad Mexicana de Alergia e Inmunología, A.C
https://www.readbyqxmd.com/read/27641927/ibrutinib-inhibition-of-bruton-protein-tyrosine-kinase-btk-in-the-treatment-of-b-cell-neoplasms
#8
REVIEW
Robert Roskoski
The Bruton non-receptor protein-tyrosine kinase (BTK), a deficiency of which leads to X-linked agammaglobulinemia, plays a central role in B cell antigen receptor signaling. Owing to the exclusivity of this enzyme in B cells, the acronym could represent B cell tyrosine kinase. BTK is activated by the Lyn and SYK protein kinases following activation of the B cell receptor. BTK in turn catalyzes the phosphorylation and activation of phospholipase Cγ2 leading to the downstream activation of the Ras/RAF/MEK/ERK pathway and the NF-κB pathways...
November 2016: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/27512878/clinical-characteristics-and-genetic-profiles-of-174-patients-with-x-linked-agammaglobulinemia-report-from-shanghai-china-2000-2015
#9
Xia-Fang Chen, Wei-Fan Wang, Yi-Dan Zhang, Wei Zhao, Jing Wu, Tong-Xin Chen
X-linked agammaglobulinemia (XLA) is a humoral primary immunodeficiency. XLA patients typically present with very low numbers of peripheral B cells and a profound deficiency of all immunoglobulin isotypes. Most XLA patients carry mutations in Bruton tyrosine kinase (BTK) gene.The genetic background and clinical features of 174 Chinese patients with XLA were investigated. The relationship between specific BTK gene mutations and severity of clinical manifestations was also examined. Mutations were graded from mild to severe based on structural and functional prediction through bioinformatics analysis...
August 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27434128/preclinical-evaluation-of-the-novel-btk-inhibitor-acalabrutinib-in-canine-models-of-b-cell-non-hodgkin-lymphoma
#10
Bonnie K Harrington, Heather L Gardner, Raquel Izumi, Ahmed Hamdy, Wayne Rothbaum, Kevin R Coombes, Todd Covey, Allard Kaptein, Michael Gulrajani, Bart Van Lith, Cecile Krejsa, Christopher C Coss, Duncan S Russell, Xiaoli Zhang, Bridget K Urie, Cheryl A London, John C Byrd, Amy J Johnson, William C Kisseberth
Acalabrutinib (ACP-196) is a second-generation inhibitor of Bruton agammaglobulinemia tyrosine kinase (BTK) with increased target selectivity and potency compared to ibrutinib. In this study, we evaluated acalabrutinib in spontaneously occurring canine lymphoma, a model of B-cell malignancy similar to human diffuse large B-cell lymphoma (DLBCL). First, we demonstrated that acalabrutinib potently inhibited BTK activity and downstream effectors in CLBL1, a canine B-cell lymphoma cell line, and primary canine lymphoma cells...
2016: PloS One
https://www.readbyqxmd.com/read/27312172/from-immune-substitution-to-immunomodulation
#11
Volker Wahn
Intravenous immunoglobulins (IVIGs) are currently used in many fields of medicine for replacement and immunomodulation. This review focuses on the milestones in the history of human immunoglobulins since the initial observation by Ogden C. Bruton who described replacement therapy in a boy with agammaglobulinemia. Since then, the preparations used for treatment have been markedly improved with respect to tolerability, clinical efficacy, and pathogen safety. Preparations and appropriate pumps for subcutaneous administration of IgG have been developed and offer an alternative mode of treatment for immunodeficient patients...
April 2016: Seminars in Hematology
https://www.readbyqxmd.com/read/27080822/-shifting-cellulitis-in-a-patient-with-x-linked-hypogammaglobulinemia
#12
F Poizeau, C Droitcourt, C Saillard, M Poirot, T Le Gallou, A Perlat, A Dupuy
BACKGROUND: In cases of immunodeficiency, a systemic infection may be revealed by atypical symptoms, particularly those involving the skin. PATIENTS AND METHODS: The present case describes a 19-year-old male with X-linked hypogammaglobulinemia, or Bruton agammaglobulinemia, treated with intravenous immunoglobulin G antibodies. Over a 6-week period, the patient developed recurrent plaques in both legs, first on one and then on the other, without fever. Blood cultures were repeated and the fifth pair proved positive for Campylobacter jejuni...
June 2016: Annales de Dermatologie et de Vénéréologie
https://www.readbyqxmd.com/read/27040703/bruton-tyrosine-kinase-inhibition-in-chronic-lymphocytic-leukemia
#13
REVIEW
Kami Maddocks, Jeffrey A Jones
Chronic lymphocytic leukemia (CLL) is the most common adult leukemia and remains incurable outside of the setting of allogeneic stem cell transplant. While the standard therapy for both initial and relapsed CLL has traditionally included monoclonal antibody therapy in combination with chemotherapy, there are patients with high-risk disease features including unmutated IgVH, del(11q22) and del(17p13) that are associated with poor overall responses to these therapies with short time to relapse and shortened overall survival...
April 2016: Seminars in Oncology
https://www.readbyqxmd.com/read/27010561/dynamic-allostery-mediated-by-a-conserved-tryptophan-in-the-tec-family-kinases
#14
Nikita Chopra, Thomas E Wales, Raji E Joseph, Scott E Boyken, John R Engen, Robert L Jernigan, Amy H Andreotti
Bruton's tyrosine kinase (Btk) is a Tec family non-receptor tyrosine kinase that plays a critical role in immune signaling and is associated with the immunological disorder X-linked agammaglobulinemia (XLA). Our previous findings showed that the Tec kinases are allosterically activated by the adjacent N-terminal linker. A single tryptophan residue in the N-terminal 17-residue linker mediates allosteric activation, and its mutation to alanine leads to the complete loss of activity. Guided by hydrogen/deuterium exchange mass spectrometry results, we have employed Molecular Dynamics simulations, Principal Component Analysis, Community Analysis and measures of node centrality to understand the details of how a single tryptophan mediates allostery in Btk...
March 2016: PLoS Computational Biology
https://www.readbyqxmd.com/read/26931785/x-linked-agammagobulinemia-in-a-large-series-of-north-african-patients-frequency-clinical-features-and-novel-btk-mutations
#15
MULTICENTER STUDY
Zahra Aadam, Nadia Kechout, Abdelhamid Barakat, Koon-Wing Chan, Meriem Ben-Ali, Imen Ben-Mustapha, Fethi Zidi, Fatima Ailal, Nabila Attal, Fatouma Doudou, Mohamed-Cherif Abbadi, Chawki Kaddache, Leila Smati, Nabila Touri, Jalel Chemli, Tahar Gargah, Ines Brini, Amina Bakhchane, Hicham Charoute, Leila Jeddane, Sara El Atiqi, Naïma El Hafidi, Mustapha Hida, Rachid Saile, Hanane Salih Alj, Rachida Boukari, Mohamed Bejaoui, Jilali Najib, Mohamed-Ridha Barbouche, Yu-Lung Lau, Fethi Mellouli, Ahmed Aziz Bousfiha
PURPOSE: X-linked agammagobulinemia (XLA) is a primary immunodeficiency caused by Bruton's tyrosine kinase (BTK) gene defect. XLA patients have absent or reduced number of peripheral B cells and a profound deficiency in all immunoglobulin isotypes. This multicenter study reports the clinical, immunological and molecular features of Bruton's disease in 40 North African male patients. METHODS: Fifty male out of 63 (male and female) patients diagnosed with serum agammaglobulinemia and non detectable to less than 2% peripheral B cells were enrolled...
April 2016: Journal of Clinical Immunology
https://www.readbyqxmd.com/read/26910880/cohort-of-iranian-patients-with-congenital-agammaglobulinemia-mutation-analysis-and-novel-gene-defects
#16
Hassan Abolhassani, Massimiliano Vitali, Vassilios Lougaris, Silvia Giliani, Nima Parvaneh, Leila Parvaneh, Babak Mirminachi, Taher Cheraghi, Hosseinali Khazaei, Seyed Alireza Mahdaviani, Fatemeh Kiaei, Naiimeh Tavakolinia, Javad Mohammadi, Babak Negahdari, Nima Rezaei, Lennart Hammarstrom, Alessandro Plebani, Asghar Aghamohammadi
OBJECTIVES: Impairment in early B-cell development can cause a predominantly antibody deficiency with severe depletion of peripheral B-cells. Mutations in the gene encoding for Bruton's-tyrosine-kinase (BTK) and the components of the pre-B-cell receptor complex or downstream signaling molecules have been related to this defect in patients with agammaglobulinemia. METHODS: Iranian patients with congenital agammaglobulinemia were included and the correlation between disease-causing mutations and parameters such as clinical and immunologic phenotypes were evaluated in available patients...
2016: Expert Review of Clinical Immunology
https://www.readbyqxmd.com/read/26873735/allogeneic-stem-cell-transplantation-for-x-linked-agammaglobulinemia-using-reduced-intensity-conditioning-as-a-model-of-the-reconstitution-of-humoral-immunity
#17
Kazuhiro Ikegame, Kohsuke Imai, Motoi Yamashita, Akihiro Hoshino, Hirokazu Kanegane, Tomohiro Morio, Katsuji Kaida, Takayuki Inoue, Toshihiro Soma, Hiroya Tamaki, Masaya Okada, Hiroyasu Ogawa
BACKGROUND: We herein report the first case of X-linked agammaglobulinemia (XLA) that underwent allogeneic stem cell transplantation using reduced intensity conditioning (RIC). We chronologically observed the reconstitution of humoral immunity in this case. CASE PRESENTATION: The patient was a 28-year-old Japanese male with XLA who previously had life-threatening infectious episodes and was referred for the possible indication of allogeneic stem cell transplantation...
February 13, 2016: Journal of Hematology & Oncology
https://www.readbyqxmd.com/read/26659727/oral-administration-of-bruton-s-tyrosine-kinase-inhibitors-impairs-gpvi-mediated-platelet-function
#18
Rachel A Rigg, Joseph E Aslan, Laura D Healy, Michael Wallisch, Marisa L D Thierheimer, Cassandra P Loren, Jiaqing Pang, Monica T Hinds, András Gruber, Owen J T McCarty
The Tec family kinase Bruton's tyrosine kinase (Btk) plays an important signaling role downstream of immunoreceptor tyrosine-based activation motifs in hematopoietic cells. Mutations in Btk are involved in impaired B-cell maturation in X-linked agammaglobulinemia, and Btk has been investigated for its role in platelet activation via activation of the effector protein phospholipase Cγ2 downstream of the platelet membrane glycoprotein VI (GPVI). Because of its role in hematopoietic cell signaling, Btk has become a target in the treatment of chronic lymphocytic leukemia and mantle cell lymphoma; the covalent Btk inhibitor ibrutinib was recently approved by the US Food and Drug Administration for treatment of these conditions...
March 1, 2016: American Journal of Physiology. Cell Physiology
https://www.readbyqxmd.com/read/26527549/x-linked-agammaglobulinemia-with-normal-immunoglobulin-and-near-normal-vaccine-seroconversion
#19
Kahn Preece, Graeme Lear
We present a 22-month-old boy with X-linked agammaglobulinemia masked by normal immunoglobulin levels and vaccine seroconversion. Diagnosis was made after strong clinical suspicion of immune deficiency led to identification of markedly reduced B-cell numbers and confirmation with identification of a novel Bruton tyrosine kinase gene mutation. He was commenced on replacement immunoglobulin therapy with excellent clinical improvement. This case highlights the variability of phenotypic presentation and apparent disunity between routine immunologic investigations and severe disease in X-linked agammaglobulinemia, necessitating clinical acumen to make the diagnosis...
December 2015: Pediatrics
https://www.readbyqxmd.com/read/26387629/prevalence-of-btk-mutations-in-male-algerian-patterns-with-agammaglobulinemia-and-severe-b-cell-lymphopenia
#20
Soraya Boushaki, Azzedine Tahiat, Yanis Meddour, Koon Wing Chan, Samia Chaib, Nafissa Benhalla, Leila Smati, Abdellatif Bensenouci, Yu-Lung Lau, Frédérique Magdinier, Réda Djidjik
X linked agammaglobulinemia (XLA) is the first described primary immunodeficiency and the most common form of agammaglobulinemia. It is characterized by susceptibility to recurrent infections, profound decrease of all immunoglobulin isotypes and very low level of B lymphocytes in peripheral blood. The disorder is caused by mutations in the Bruton's Tyrosine Kinase (BTK). Nine male patients suspected to have XLA from nine unrelated families were enrolled in this study. We performed sequencing of the BTK gene in all nine patients, and in the patients' relatives when possible...
December 2015: Clinical Immunology: the Official Journal of the Clinical Immunology Society
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