keyword
https://read.qxmd.com/read/38647535/convergent-epigenetic-evolution-drives-relapse-in-acute-myeloid-leukemia
#1
JOURNAL ARTICLE
Kevin Nuno, Armon Azizi, Thomas Koehnke, Caleb Lareau, Asiri Ediriwickrema, M Ryan Corces, Ansuman T Satpathy, Ravindra Majeti
Relapse of acute myeloid leukemia (AML) is highly aggressive and often treatment refractory. We analyzed previously published AML relapse cohorts and found that 40% of relapses occur without changes in driver mutations, suggesting that non-genetic mechanisms drive relapse in a large proportion of cases. We therefore characterized epigenetic patterns of AML relapse using 26 matched diagnosis-relapse samples with ATAC-seq. This analysis identified a relapse-specific chromatin accessibility signature for mutationally stable AML, suggesting that AML undergoes epigenetic evolution at relapse independent of mutational changes...
April 22, 2024: ELife
https://read.qxmd.com/read/38647382/separating-the-wheat-from-the-chaff-among-hla-dq-eplets
#2
JOURNAL ARTICLE
Magali Devriese, François A Lemonnier, Julien Lion, Caroline Sayegh, Emma Fleury, Catherine Shofstall, Lisa Giraldo, Quentin Fiachetti, Cédric Usureau, Hiroko Miyadera, Olivier Toutirais, Nuala Mooney, Dave Lowe, Jean-Luc Taupin
In transplantation, anti-HLA Abs, especially targeting the DQ locus, are well-known to lead to rejection. These Abs identified by Luminex single Ag assays recognize polymorphic amino acids on HLA, named eplets. The HLA Eplet Registry included 83 DQ eplets, mainly deduced from amino acid sequence alignments, among which 66 have not been experimentally verified. Because eplet mismatch load may improve organ allocation and transplant outcomes, it is imperative to confirm the genuine reactivity of eplets to validate this approach...
April 22, 2024: Journal of Immunology
https://read.qxmd.com/read/38646491/clinical-significance-of-the-cxcl8-cxcr1-r2-signalling-axis-in-patients-with-invasive-breast-cancer
#3
JOURNAL ARTICLE
Sebastian Stępień, Marta Smycz-Kubańska, Celina Kruszniewska-Rajs, Joanna Magdalena Gola, Jacek Kabut, Paweł Olczyk, Aleksandra Mielczarek-Palacz
The C-X-C motif chemokine ligand 8 (CXCL8)-C-X-C chemokine receptor (CXCR)1/2 signalling axis is among numerous mechanisms which stimulate the immune system to defend against tumour growth and influence the tumour microenvironment to promote tumour growth. This pathway plays an important role in the development of a number of cancers including breast cancer (BC). The aim of the present study was to analyse the levels of the chemokine CXCL8 and its receptors, CXCR1 and CXCR2, in the serum of female patients with invasive BC and to assess the expression of these parameters at the mRNA level, considering molecular subtypes and degrees of cancer malignancy...
June 2024: Oncology Letters
https://read.qxmd.com/read/38646010/a-synthetic-biology-approach-for-the-treatment-of-pollutants-with-microalgae
#4
REVIEW
Luke J Webster, Denys Villa-Gomez, Reuben Brown, William Clarke, Peer M Schenk
The increase in global population and industrial development has led to a significant release of organic and inorganic pollutants into water streams, threatening human health and ecosystems. Microalgae, encompassing eukaryotic protists and prokaryotic cyanobacteria, have emerged as a sustainable and cost-effective solution for removing these pollutants and mitigating carbon emissions. Various microalgae species, such as C. vulgaris, P. tricornutum, N. oceanica, A. platensis, and C. reinhardtii, have demonstrated their ability to eliminate heavy metals, salinity, plastics, and pesticides...
2024: Frontiers in Bioengineering and Biotechnology
https://read.qxmd.com/read/38641230/transcriptomic-and-western-blot-characterisation-of-the-human-cleff4-clone-a-new-rapid-cell-line-replacement-for-the-caco2-model
#5
JOURNAL ARTICLE
Andrew Crowe
The CLEFF4 sub clone from stock late passage Caco2 cells has a unique property of being able to develop polarised cell monolayers with high P-gp expression and tight junctions much quicker than the original cell line. Instead of being useful for transport studies 21-24 days after initiating culture, the CLEFF4 cell line matures in 5-6 days with tight junctions surpassing that of 3 week old Caco2 cells in that time frame [1]. This has enabled the CLEFF4 cell line to provide measures of apparent permeability for potential drug candidates, so important for pre-clinical drug development, 4 times faster than the original cell line...
April 17, 2024: European Journal of Pharmaceutics and Biopharmaceutics
https://read.qxmd.com/read/38640729/preparation-and-brain-targeting-effects-study-of-recombinant-human-ferritin-nanoparticles
#6
JOURNAL ARTICLE
Zhixian Wang, Xiaoling Xu, Yunhuan Zhu, Yuncheng Qian, Yilu Feng, Hongyu Li, Guoheng Hu
Human heavy-chain ferritin is a naturally occurring protein with high stability and multifunctionality in biological systems. This study aims to utilize a prokaryotic expression system to produce recombinant human heavy-chain ferritin nanoparticles and investigate their targeting ability in brain tissue. The human heavy-chain ferritin gene was cloned into the prokaryotic expression vector pET28a and transformed into Escherichia coli BL21 (DE3) competent cells to explore optimal expression conditions. The recombinant protein was then purified to evaluate its immunoreactivity and characteristics...
April 15, 2024: Biochemical and Biophysical Research Communications
https://read.qxmd.com/read/38640638/epidemiological-characteristics-of-human-and-chicken-derived-ctx-m-type-extended-spectrum-%C3%AE-lactamase-producing-escherichia-coli-from-china
#7
JOURNAL ARTICLE
Xuan Chen, Zi-Jing Ju, Chao Li, Qin Wang, Xue Yang, Zhe-Ren Huang, Chang-Wei Lei, Hong-Ning Wang
Bacterial resistance to β-lactams is mainly attributed to CTX-M-type extended-spectrum β-lactamases (ESBLs). However, the predominant sequence type (ST) of blaCTX-M -carrying Escherichia coli (blaCTX-M -Ec) in chickens, an important food animal, in China and its contribution to human β-lactam resistance are not investigated. In this study, approximately 1808 chicken-derived strains collected from 10 provinces from 2012 to 2020 were screened for blaCTX-M -Ec, and 222 blaCTX-M -Ec were identified...
April 3, 2024: Veterinary Microbiology
https://read.qxmd.com/read/38637822/the-emergence-of-highly-resistant-and-hypervirulent-klebsiella-pneumoniae-cc14-clone-in-a-tertiary-hospital-over-8-years
#8
JOURNAL ARTICLE
Sharif Hala, Mohammed Malaikah, Jiayi Huang, Wesam Bahitham, Omniya Fallatah, Samer Zakri, Chakkiath Paul Antony, Mohammed Alshehri, Raeece Naeem Ghazzali, Fathia Ben-Rached, Abdullah Alsahafi, Asim Alsaedi, Ghadeer AlAhmadi, Mai Kaaki, Meshari Alazmi, Baraa AlhajHussein, Muhammad Yaseen, Hosam M Zowawi, Majed F Alghoribi, Abdulhakeem O Althaqafi, Abdulfattah Al-Amri, Danesh Moradigaravand, Arnab Pain
BACKGROUND: Klebsiella pneumoniae is a major bacterial and opportunistic human pathogen, increasingly recognized as a healthcare burden globally. The convergence of resistance and virulence in K. pneumoniae strains has led to the formation of hypervirulent and multidrug-resistant strains with dual risk, limiting treatment options. K. pneumoniae clones are known to emerge locally and spread globally. Therefore, an understanding of the dynamics and evolution of the emerging strains in hospitals is warranted to prevent future outbreaks...
April 18, 2024: Genome Medicine
https://read.qxmd.com/read/38635473/human-epidermal-growth-factor-receptor-2-overexpression-amplification-in-primary-ovarian-endometrioid-carcinoma
#9
JOURNAL ARTICLE
Chau M Bui, Aviv Oren, Bonnie Balzer, Horacio Maluf, Fabiola Medeiros
Human epidermal growth factor receptor 2 (HER2) expression has become increasingly helpful in predicting responses to anti-HER2 agents in gynecological cancers. This study retrospectively analyzed HER2 expression in 48 primary ovarian endometrioid carcinomas. HER2 immunohistochemistry was performed using the Ventana platform (Clone 4B5 monoclonal predilute) following the manufacturer's protocol. HER2 expression was equivocal (score 2+) by image analysis in 2 cases (4.17%) based on the breast cancer criteria...
April 18, 2024: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://read.qxmd.com/read/38628720/msln-induced-emt-cancer-stem-cell-traits-and-chemotherapy-resistance-of-pancreatic-cancer-cells
#10
JOURNAL ARTICLE
Jili Hu, Jia Wang, Xu Guo, Qing Fan, Xinming Li, Kai Li, Zhuoyin Wang, Shuntao Liang, Buhe Amin, Nengwei Zhang, Chaowen Chen, Bin Zhu
Chemoresistance is one of the main reasons for poor prognosis of pancreatic cancer. The effects of mesothelin (MSLN) on chemoresistance in pancreatic cancer are still unclear. We aim to investigate potential roles of MSLN in chemoresistance and its relationship with proliferation, epithelial-mesenchymal transition (EMT) and cancer stemness of pancreatic cancer cells. Human pancreatic cancer cell lines ASPC-1 and Mia PaCa-2 with high and low expression of MSLN, respectively, were selected. The ASPC-1 with MSLN knockout (KO) and Mia PaCa-2 of MSLN overexpression (OE) were generated...
April 30, 2024: Heliyon
https://read.qxmd.com/read/38628240/persistent-colonization-of-ciprofloxacin-resistant-and-extended-spectrum-%C3%AE-lactamase-esbl-producing-salmonella-enterica-serovar-kentucky-st198-in-a-patient-with-inflammatory-bowel-disease
#11
JOURNAL ARTICLE
Yue Jiang, Huilin Yang, Zhen-Yu Wang, Da-Chuan Lin, Xinan Jiao, Yunlong Hu, Jing Wang
OBJECTIVE: Salmonella enterica serovar Kentucky ST198 has emerged as a global threat to humans. In this study, we aimed to characterize the prolonged carriage of ciprofloxacin-resistant and extended-spectrum β-lactamase (ESBL)-producing S . Kentucky ST198 in a single patient with inflammatory bowel disease (IBD). METHODS: Three S . Kentucky strains were collected from a single patient with IBD on 11th January, 23rd January, and 8th February, 2022, respectively...
2024: Infection and Drug Resistance
https://read.qxmd.com/read/38627844/monoallelic-kras-g13c-mutation-triggers-dysregulated-expansion-in-induced-pluripotent-stem-cell-derived-hematopoietic-progenitor-cells
#12
JOURNAL ARTICLE
Huan-Ting Lin, Masatoshi Takagi, Kenji Kubara, Kazuto Yamazaki, Fumiko Michikawa, Takashi Okumura, Takuya Naruto, Tomohiro Morio, Koji Miyazaki, Hideki Taniguchi, Makoto Otsu
BACKGROUND: Although oncogenic RAS mutants are thought to exert mutagenic effects upon blood cells, it remains uncertain how a single oncogenic RAS impacts non-transformed multipotent hematopoietic stem or progenitor cells (HPCs). Such potential pre-malignant status may characterize HPCs in patients with RAS-associated autoimmune lymphoproliferative syndrome-like disease (RALD). This study sought to elucidate the biological and molecular alterations in human HPCs carrying monoallelic mutant KRAS (G13C) with no other oncogene mutations...
April 16, 2024: Stem Cell Research & Therapy
https://read.qxmd.com/read/38627827/national-genomic-epidemiology-investigation-revealed-the-spread-of-carbapenem-resistant-escherichia-coli-in-healthy-populations-and-the-impact-on-public-health
#13
JOURNAL ARTICLE
Yan Li, Yanyan Zhang, Xinran Sun, Yuchen Wu, Zelin Yan, Xiaoyang Ju, Yonglu Huang, Hongwei Zhou, Zhiqiang Wang, Shaolin Wang, Rong Zhang, Ruichao Li
BACKGROUND: Carbapenem-resistant Escherichia coli (CREC) has been considered as WHO priority pathogens, causing a great public health concern globally. While CREC from patients has been thoroughly investigated, the prevalence and underlying risks of CREC in healthy populations have been overlooked. Systematic research on the prevalence of CREC in healthy individuals was conducted here. We aimed to characterize CREC collected from healthy populations in China between 2020 and 2022 and to compare the genomes of CREC isolates isolated from healthy individuals and clinical patients...
April 16, 2024: Genome Medicine
https://read.qxmd.com/read/38622016/lineage-analysis-and-birthdating-of-drosophila-central-complex-lineages
#14
JOURNAL ARTICLE
Adil R Wani, Aisha Hamid, Gonzalo N Morales Chaya, Mubarak Hussain Syed
From insects to humans, the nervous system generates complex behaviors mediated by distinct neural circuits that are composed of diverse cell types. During development, the spatiotemporal gene expression of the neural progenitors expands the diversity of neuronal and glial subtypes. Various neural stem cell-intrinsic and -extrinsic gene programs have been identified that are thought to play a major role in generating diverse neuronal and glial cell types. Drosophila has served as an excellent model system for discovering the fundamental principles of nervous system development and function...
April 15, 2024: Cold Spring Harbor Protocols
https://read.qxmd.com/read/38618957/hyperactive-stat5-hijacks-t-cell-receptor-signaling-and-drives-immature-t-cell-acute-lymphoblastic-leukemia
#15
JOURNAL ARTICLE
Tobias Suske, Helena Sorger, Gabriele Manhart, Frank Ruge, Nicole Prutsch, Mark W Zimmerman, Thomas Eder, Diaaeldin I Abdallah, Barbara Maurer, Christina Wagner, Susann Schönefeldt, Katrin Spirk, Alexander Pichler, Tea Pemovska, Carmen Schweicker, Daniel Pölöske, Emina Hubanic, Dennis Jungherz, Tony Andreas Müller, Myint Myat Khine Aung, Anna Orlova, Ha Thi Thanh Pham, Kerstin Zimmel, Thomas Krausgruber, Christoph Bock, Mathias Müller, Maik Dahlhoff, Auke Boersma, Thomas Rülicke, Roman Fleck, Elvin Dominic de Araujo, Patrick Thomas Gunning, Tero Aittokallio, Satu Mustjoki, Takaomi Sanda, Sylvia Hartmann, Florian Grebien, Gregor Hoermann, Torsten Haferlach, Philipp Bernhard Staber, Heidi Anne Neubauer, Alfred Thomas Look, Marco Herling, Richard Moriggl
T cell acute lymphoblastic leukemia (T-ALL) is an aggressive immature T cell cancer. Mutations in IL7R have been analyzed genetically, but downstream effector functions such as STAT5A and STAT5B hyperactivation are poorly understood. Here, we studied the most frequent and clinically challenging STAT5BN642H driver in T cell development and immature T cell cancer onset and compared it with STAT5A hyperactive variants in transgenic mice. Enhanced STAT5 activity caused disrupted T cell development and promoted an early T cell progenitor-ALL phenotype, with upregulation of genes involved in T cell receptor (TCR) signaling, even in absence of surface TCR...
April 15, 2024: Journal of Clinical Investigation
https://read.qxmd.com/read/38617287/somatic-epimutations-enable-single-cell-lineage-tracing-in-native-hematopoiesis-across-the-murine-and-human-lifespan
#16
Michael Scherer, Indranil Singh, Martina Braun, Chelsea Szu-Tu, Michael Kardorff, Julia Rühle, Robert Frömel, Sergi Beneyto-Calabuig, Simon Raffel, Alejo Rodriguez-Fraticelli, Lars Velten
Current approaches to lineage tracing of stem cell clones require genetic engineering or rely on sparse somatic DNA variants, which are difficult to capture at single-cell resolution. Here, we show that targeted single-cell measurements of DNA methylation at single-CpG resolution deliver joint information about cellular differentiation state and clonal identities. We develop EPI-clone, a droplet-based method for transgene-free lineage tracing, and apply it to study hematopoiesis, capturing hundreds of clonal trajectories across almost 100,000 single-cells...
April 1, 2024: bioRxiv
https://read.qxmd.com/read/38616437/super-epitope-dengue-vaccine-instigated-serotype-independent-immune-protection-in-silico
#17
JOURNAL ARTICLE
Shovan Naskar, Hitesh Harsukhbhai Chandpa, Shalini Agarwal, Jairam Meena
Dengue becomes the most common life-threatening infectious arbovirus disease globally, with prevalence in the tropical and subtropical areas. The major clinical features include dengue haemorrhagic fever (DHF) and dengue shock syndrome (DSS), a condition of hypovolemic shock. Four different serotypes of the dengue virus, known as dengue virus serotype (DENV)- 1, 2, 3 and 4 can infect humans. Only one vaccine is available in the market, named Dengvaxia by Sanofi Pasteur, but there is no desired outcome of this treatment due the antibody dependent enhancement (ADE) of the multiple dengue serotypes...
April 13, 2024: Vaccine
https://read.qxmd.com/read/38616191/comparison-of-human-leukocyte-antigen-in-patients-with-paroxysmal-nocturnal-hemoglobinuria-of-different-clone-sizes
#18
JOURNAL ARTICLE
Zhuxin Zhang, Qinglin Hu, Chen Yang, Miao Chen, Bing Han
Glycosylphosphatidylinositol-anchored protein-deficient hematopoietic stem and progenitor cell development caused by PIGA mutations cannot fully explain the pathogenesis of paroxysmal nocturnal hemoglobinuria (PNH). Herein, patients newly diagnosed with PNH at our hospital between April 2019 and April 2021 were recruited. The human leukocyte antigen (HLA) class I and II loci were analyzed, and patients were stratified by PNH clone sizes: small (< 50%) and large (≥ 50%). In 40 patients (29 males; 72...
April 15, 2024: Annals of Hematology
https://read.qxmd.com/read/38615318/nkp44-hla-dp-dependent-regulation-of-cd8-effector-t%C3%A2-cells-by-nk-cells
#19
JOURNAL ARTICLE
Benedetta Padoan, Christian Casar, Jenny Krause, Christoph Schultheiss, Martin E Baumdick, Annika Niehrs, Britta F Zecher, Maria Pujantell, Yuko Yuki, Maureen Martin, Ester B M Remmerswaal, Tamara Dekker, Nelly D van der Bom-Baylon, Janelle A Noble, Mary Carrington, Frederike J Bemelman, Rene A W van Lier, Mascha Binder, Nicola Gagliani, Madeleine J Bunders, Marcus Altfeld
Although natural killer (NK) cells are recognized for their modulation of immune responses, the mechanisms by which human NK cells mediate immune regulation are unclear. Here, we report that expression of human leukocyte antigen (HLA)-DP, a ligand for the activating NK cell receptor NKp44, is significantly upregulated on CD8+ effector T cells, in particular in human cytomegalovirus (HCMV)+ individuals. HLA-DP+ CD8+ T cells expressing NKp44-binding HLA-DP antigens activate NKp44+ NK cells, while HLA-DP+ CD8+ T cells not expressing NKp44-binding HLA-DP antigens do not...
April 12, 2024: Cell Reports
https://read.qxmd.com/read/38615309/characterization-of-immortalized-ovarian-epithelial-cells-with-brca1-2-mutation
#20
JOURNAL ARTICLE
Hiroaki Komatsu, Masayo Okawa, Yasuhiro Kazuki, Kanako Kazuki, Genki Hichiwa, Kazuto Shimoya, Shinya Sato, Fuminori Taniguchi, Mitsuo Oshimura, Tasuku Harada
We aimed to elucidate the mechanism underlying carcinogenesis by comparing normal and BRCA1/2-mutated ovarian epithelial cells established via Sendai virus-based immortalization. Ovarian epithelial cells (normal epithelium: Ovn; with germline BRCA1 mutation: OvBRCA1; with germline BRCA2 mutation: OvBRCA2) were infected with Sendai virus vectors carrying three immortalization genes (Bmi-1, hTERT, and SV40T). The immunoreactivity to anti-epithelial cellular adhesion molecule (EpCAM) antibodies in each cell line and cells after 25 passages was confirmed using flow cytometry...
April 14, 2024: Human Cell
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