keyword
MENU ▼
Read by QxMD icon Read
search

single b cell cloning

keyword
https://www.readbyqxmd.com/read/29431697/convergent-therapeutic-strategies-to-overcome-the-heterogeneity-of-acquired-resistance-in-brafv600e-colorectal-cancer
#1
Mehlika Hazar-Rethinam, Marianna Kleyman, G Celine Han, David Liu, Leanne G Ahronian, Heather A Shahzade, Lifeng Chen, Aparna R Parikh, Jill N Allen, Jeffrey W Clark, Eunice L Kwak, Jason E Faris, Janet E Murphy, Theodore S Hong, Emily E Van Seventer, Brandon Nadres, Catriona B Hong, Joseph M Gurski, Nicholas A Jessop, Dora Dias-Santagata, A John Iafrate, Eliezer M Van Allen, Ryan B Corcoran
Clonal heterogeneity associated with acquired resistance presents a critical therapeutic challenge. Whole-exome sequencing of paired tumor biopsies and targeted sequencing of cell-free DNA (cfDNA) from BRAFV600E colorectal cancer patients receiving BRAF inhibitor combinations identified 14 distinct alterations in MAPK pathway components driving acquired resistance, with as many as eight alterations in a single patient. We developed a novel pooled clone system to study clonal outgrowth during acquired resistance, in vitro and in vivo...
February 5, 2018: Cancer Discovery
https://www.readbyqxmd.com/read/29403498/two-distinct-pathways-in-mice-generate-antinuclear-antigen-reactive-b-cell-repertoires
#2
Martin Faderl, Fabian Klein, Oliver F Wirz, Stefan Heiler, Llucia Albertí-Servera, Corinne Engdahl, Jan Andersson, Antonius Rolink
The escape of anti-self B cells from tolerance mechanisms like clonal deletion, receptor editing, and anergy results in the production of autoantibodies, which is a hallmark of many autoimmune disorders. In this study, we demonstrate that both germline sequences and somatic mutations contribute to autospecificity of B cell clones. For this issue, we investigated the development of antinuclear autoantibodies (ANAs) and their repertoire in two different mouse models. First, in aging mice that were shown to gain several autoimmune features over time including ANAs...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29400437/different-bioactive-neuropeptides-are-expressed-in-two-sub-classes-of-gabaergic-rme-nerve-ring-motorneurons-inascaris-suum
#3
Jennifer J Knickelbine, Christopher J Konop, India R Viola, Colette B Rogers, Lynn A Messinger, Martha M Vestling, Antony O W Stretton
Neuropeptides can have significant effects on neurons and synapses, but among the ~250 predicted peptides in nematodes, few have been functionally characterized. Here, we report new neuropeptides in the 4 RME nerve ring motorneurons of the nematode Ascaris suum. These GABAergic neurons are involved in three-dimensional head movement. Mass spectrometry (MS) of single dissected RMEs detected a total of 12 neuropeptides (encoded by 5 genes), 9 of which are novel. None of these are expressed in the DI/VI inhibitory GABAergic motorneurons that synapse onto body wall muscle...
February 5, 2018: ACS Chemical Neuroscience
https://www.readbyqxmd.com/read/29391594/contraction-of-t-cell-richness-in-lung-cancer-brain-metastases
#4
Aaron S Mansfield, Hongzheng Ren, Shari Sutor, Vivekananda Sarangi, Asha Nair, Jaime Davila, Laura R Elsbernd, Julia B Udell, Roxana S Dronca, Sean Park, Svetomir N Markovic, Zhifu Sun, Kevin C Halling, Wendy K Nevala, Marie Christine Aubry, Haidong Dong, Jin Jen
Very little is known about how the adaptive immune system responds to clonal evolution and tumor heterogeneity in non-small cell lung cancer. We profiled the T-cell receptor β complementarity determining region 3 in 20 patients with fully resected non-small cell lung cancer primary lesions and paired brain metastases. We characterized the richness, abundance and overlap of T cell clones between pairs, in addition to the tumor mutation burden and predicted neoantigens. We found a significant contraction in the number of unique T cell clones in brain metastases compared to paired primary cancers...
February 1, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29388096/activation-induced-cytidine-deaminase-aided-in-vitro-antibody-evolution
#5
Lili An, Chuan Chen, Ruiqi Luo, Yun Zhao, Haiying Hang
Activation-induced cytidine deaminase (AID) initiates somatic hypermutation (SHM) by converting deoxycytidines (dC) to deoxyuracils (dU) which then can induce other mutations, and plays a central role in introducing diversification of the antibody repertoire in B cells. Ectopic expression of AID in bacteria and non-B cells can also lead to frequent mutations in highly expressed genes. Taking advantage of this feature of AID, in recent years, systems coupling in vitro somatic hypermutation and mammalian cell surface display have been developed, with unique benefits in antibody discovery and optimization in vitro...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29379065/preferential-amplification-of-a-human-mitochondrial-dna-deletion-in-vitro-and-in-vivo
#6
Oliver M Russell, Isabelle Fruh, Pavandeep K Rai, David Marcellin, Thierry Doll, Amy Reeve, Mitchel Germain, Julie Bastien, Karolina A Rygiel, Raffaele Cerino, Andreas W Sailer, Majlinda Lako, Robert W Taylor, Matthias Mueller, Robert N Lightowlers, Doug M Turnbull, Stephen B Helliwell
We generated induced pluripotent stem cells (iPSCs) from patient fibroblasts to yield cell lines containing varying degrees of heteroplasmy for a m.13514 A > G mtDNA point mutation (2 lines) and for a ~6 kb single, large scale mtDNA deletion (3 lines). Long term culture of the iPSCs containing a single, large-scale mtDNA deletion showed consistent increase in mtDNA deletion levels with time. Higher levels of mtDNA heteroplasmy correlated with increased respiratory deficiency. To determine what changes occurred in deletion level during differentiation, teratomas comprising all three embryonic germ layers were generated from low (20%) and intermediate heteroplasmy (55%) mtDNA deletion clones...
January 29, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29369007/combination-therapy-eve-and-pac-to-induce-apoptosis-in-cervical-cancer-cells-by-targeting-pi3k-akt-mtor-pathways
#7
Pingping Dong, Fengmei Hao, Shufeng Dai, Lin Tian
This study aimed to investigate the anti-cervical cancer effects of everolimus (Eve) and paclitaxel (Pac) when used alone or in combination. Human cervical cancer cells HeLa and SiHa were divided into four group: Blank control group (control), everolimus group (Eve), paclitaxel group (Pac) and combined therapy group (Eve + Pac). The cell viability was detected by CCK-8 assay and the cell cloning ability was detected by clonegenic assay. Flow cytometry was used to detect cell apoptosis. Meanwhile, the expression of phosphatidylinositol 3-kinase (PI3K), protein kinase B (AKT), mammalian target of rapamycin (mTOR) and their phosphorylated proteins were studied by western blot...
February 2018: Journal of Receptor and Signal Transduction Research
https://www.readbyqxmd.com/read/29323083/monoclonal-gammopathy-with-double-m-bands-an-atypical-presentation-on-serum-protein-electrophoresis-simulating-biclonal-gammopathy
#8
Kaustubh Bora, Umesh Das, Bhupen Barman, Alice Abraham Ruram
Monoclonal gammopathies, such as multiple myeloma, typically exhibit high levels of a monoclonal immunoglobulin (M-protein), produced by a clone of abnormally proliferating B-lymphocytes and/or plasma cells. The M-protein can be evaluated by serum protein electrophoresis (SPEP), which yields a single discrete band (M-band), usually in the γ-globulin region. Rarely, two M-bands appear simultaneously at different positions during SPEP - a condition known as biclonal gammopathy, which is a result of clonal expansion of two different neoplastic cell lines...
October 2017: Indian Journal of Pathology & Microbiology
https://www.readbyqxmd.com/read/29233929/single-cell-rna-seq-reveals-a-subpopulation-of-prostate-cancer-cells-with-enhanced-cell-cycle-related-transcription-and-attenuated-androgen-response
#9
Aaron M Horning, Yao Wang, Che-Kuang Lin, Anna D Louie, Rohit R Jadhav, Chia-Nung Hung, Chiou-Miin Wang, Chun-Lin Lin, Nameer B Kirma, Michael A Liss, Addanki P Kumar, LuZhe Sun, Zhijie Liu, Wei-Ting Chao, Qianben Wang, Victor X Jin, Chun-Liang Chen, Tim H-M Huang
Increasing evidence suggests the presence of minor cell subpopulations in prostate cancer that are androgen independent and poised for selection as dominant clones after androgen-deprivation therapy. In this study, we investigated this phenomenon by stratifying cell subpopulations based on transcriptome profiling of 144 single LNCaP prostate cancer cells treated or untreated with androgen after cell cycle synchronization. Model-based clustering of 397 differentially expressed genes identified eight potential subpopulations of LNCaP cells, revealing a previously unappreciable level of cellular heterogeneity to androgen stimulation...
December 12, 2017: Cancer Research
https://www.readbyqxmd.com/read/29233832/exome-wide-association-study-identifies-four-novel-loci-for-systemic-lupus-erythematosus-in-han-chinese-population
#10
Leilei Wen, Caihong Zhu, Zhengwei Zhu, Chao Yang, Xiaodong Zheng, Lu Liu, Xianbo Zuo, Yujun Sheng, Huayang Tang, Bo Liang, Yi Zhou, Pan Li, Jun Zhu, Yantao Ding, Gang Chen, Jinping Gao, Lili Tang, Yuyan Cheng, Jingying Sun, Tamilselvi Elango, Anjana Kafle, Ruixing Yu, Ke Xue, Yaohua Zhang, Feng Li, Zhanguo Li, Jianping Guo, Xuan Zhang, Chen Zhou, Yuanjia Tang, Nan Shen, Meng Wang, Xueqing Yu, Shengxiu Liu, Xing Fan, Min Gao, Fengli Xiao, Peiguang Wang, Zaixing Wang, Anping Zhang, Fusheng Zhou, Liangdan Sun, Sen Yang, Jinhua Xu, Xianyong Yin, Yong Cui, Xuejun Zhang
OBJECTIVES: Systemic lupus erythematosus (SLE) is a chronic autoimmune disease of considerable genetic predisposition. Genome-wide association studies have identified tens of common variants for SLE. However, the majority of them reside in non-coding sequences. The contributions of coding variants have not yet been systematically evaluated. METHODS: We performed a large-scale exome-wide study in 5004 SLE cases and 8179 healthy controls in a Han Chinese population using a custom exome array, and then genotyped 32 variants with suggestive evidence in an independent cohort of 13 246 samples...
December 12, 2017: Annals of the Rheumatic Diseases
https://www.readbyqxmd.com/read/29228562/clinical-mutational-profiling-of-1006-lung-cancers-by-next-generation-sequencing
#11
Peter B Illei, Deborah Belchis, Li-Hui Tseng, Doreen Nguyen, Federico De Marchi, Lisa Haley, Stacy Riel, Katie Beierl, Gang Zheng, Julie R Brahmer, Frederic B Askin, Christopher D Gocke, James R Eshleman, Patrick M Forde, Ming-Tseh Lin
Analysis of lung adenocarcinomas for actionable mutations has become standard of care. Here, we report our experience using next generation sequencing (NGS) to examine AKT1, BRAF, EGFR, ERBB2, KRAS, NRAS, and PIK3CA genes in 1006 non-small cell lung cancers in a clinical diagnostic setting. NGS demonstrated high sensitivity. Among 760 mutations detected, the variant allele frequency (VAF) was 2-5% in 33 (4.3%) mutations and 2-10% in 101 (13%) mutations. A single bioinformatics pipeline using Torrent Variant Caller, however, missed a variety of EGFR mutations...
November 14, 2017: Oncotarget
https://www.readbyqxmd.com/read/29212910/foxp1-negatively-regulates-t-follicular-helper-cell-differentiation-and-germinal-center-responses-by-controlling-cell-migration-and-ctla-4
#12
Bi Shi, Jianlin Geng, Yin-Hu Wang, Hairong Wei, Beth Walters, Wei Li, Xuerui Luo, Anna Stevens, Melanie Pittman, Bin Li, Sunnie R Thompson, Hui Hu
T follicular helper (Tfh) cells play an essential role in the formation of germinal centers (GC) and generation of high-affinity Abs. The homing of activated CD4+ T cells into B cell follicles and the involvement of key costimulatory and coinhibitory molecules are critical in controlling both the initiation and the magnitude of GC responses. Meanwhile, studies have shown that a high number of single clone B cells leads to intraclonal competition, which inhibits the generation of high-affinity Abs. Our previous work has shown that transcription factor Foxp1 is a critical negative regulator of Tfh cell differentiation...
December 6, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29210653/human-umbilical-cord-mesenchymal-stem-cells-subpopulations-and-their-difference-in-cell-biology-and-effects-on-retinal-degeneration-in-rcs-rats
#13
L Wang, P Li, Y Tian, Z Li, C Lian, Q Ou, C Jin, F Gao, J-Y Xu, J Wang, F Wang, J Zhang, J Zhang, W Li, H Tian, L Lu, G-T Xu
Human umbilical cord mesenchymal stem cells (hUC-MSCs) are potential candidates for treating retinal degeneration (RD). To further study the biology and therapeutic effects of these cells, two hUC-MSC subpopulations, termed hUC-MSC1 and hUC-MSC2, were isolated by single-cell cloning method and their therapeutic functions were compared in RCS rat, a RD model. Although both subsets satisfied the basic requirements for hUC-MSCs, they were significantly different in morphology, proliferation rate, differentiation capacity, phenotype and gene expression...
December 5, 2017: Current Molecular Medicine
https://www.readbyqxmd.com/read/29207527/efficient-generation-of-somatic-cell-nuclear-transfer-competent-porcine-cells-with-mutated-alleles-at-multiple-target-loci-by-using-crispr-cas9-combined-with-targeted-toxin-based-selection-system
#14
Masahiro Sato, Kazuchika Miyoshi, Shingo Nakamura, Masato Ohtsuka, Takayuki Sakurai, Satoshi Watanabe, Hiroaki Kawaguchi, Akihide Tanimoto
The recent advancement in genome editing such a CRISPR/Cas9 system has enabled isolation of cells with knocked multiple alleles through a one-step transfection. Somatic cell nuclear transfer (SCNT) has been frequently employed as one of the efficient tools for the production of genetically modified (GM) animals. To use GM cells as SCNT donor, efficient isolation of transfectants with mutations at multiple target loci is often required. The methods for the isolation of such GM cells largely rely on the use of drug selection-based approach using selectable genes; however, it is often difficult to isolate cells with mutations at multiple target loci...
December 4, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29191832/molecular-characterization-of-human-anti-hinge-antibodies-derived-from-single-cell-cloning-of-normal-human-b-cells
#15
Tao Huang, Mary Mathieu, Sophia Lee, Xinhua Wang, Yee Seir Kee, Jack J Bevers, Claudio Ciferri, Alberto Estavez, Manda Wong, Nancy Y Chiang, Gerald Nakamura, Randall J Brezski
Anti-hinge antibodies (AHAs) are an autoantibody subclass that, following proteolytic cleavage, recognize cryptic epitopes exposed in the hinge regions of immunoglobulins (Igs) and do not bind to the intact Ig counterpart. AHAs have been postulated to exacerbate chronic inflammatory disorders such as inflammatory bowel disease and rheumatoid arthritis. On the other hand, AHAs may protect against invasive microbial pathogens and cancer. However, despite more than 50 years of study, the origin and specific B cell compartments that express AHAs remain elusive...
January 19, 2018: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29174333/injury-activates-transient-olfactory-stem-cell-states-with-diverse-lineage-capacities
#16
Levi Gadye, Diya Das, Michael A Sanchez, Kelly Street, Ariane Baudhuin, Allon Wagner, Michael B Cole, Yoon Gi Choi, Nir Yosef, Elizabeth Purdom, Sandrine Dudoit, Davide Risso, John Ngai, Russell B Fletcher
Tissue homeostasis and regeneration are mediated by programs of adult stem cell renewal and differentiation. However, the mechanisms that regulate stem cell fates under such widely varying conditions are not fully understood. Using single-cell techniques, we assessed the transcriptional changes associated with stem cell self-renewal and differentiation and followed the maturation of stem cell-derived clones using sparse lineage tracing in the regenerating mouse olfactory epithelium. Following injury, quiescent olfactory stem cells rapidly shift to activated, transient states unique to regeneration and tailored to meet the demands of injury-induced repair, including barrier formation and proliferation...
November 17, 2017: Cell Stem Cell
https://www.readbyqxmd.com/read/29159189/nmdar-encephalitis-passive-transfer-from-man-to-mouse-by-a-recombinant-antibody
#17
Manish Malviya, Sumanta Barman, Kristin S Golombeck, Jesús Planagumà, Francesco Mannara, Nathalie Strutz-Seebohm, Claudia Wrzos, Fatih Demir, Christine Baksmeier, Julia Steckel, Kim Kristin Falk, Catharina C Gross, Stjepana Kovac, Kathrin Bönte, Andreas Johnen, Klaus-Peter Wandinger, Elena Martín-García, Albert J Becker, Christian E Elger, Nikolaj Klöcker, Heinz Wiendl, Sven G Meuth, Hans-Peter Hartung, Guiscard Seebohm, Frank Leypoldt, Rafael Maldonado, Christine Stadelmann, Josep Dalmau, Nico Melzer, Norbert Goebels
Objective: Autoimmune encephalitis is most frequently associated with anti-NMDAR autoantibodies. Their pathogenic relevance has been suggested by passive transfer of patients' cerebrospinal fluid (CSF) in mice in vivo. We aimed to analyze the intrathecal plasma cell repertoire, identify autoantibody-producing clones, and characterize their antibody signatures in recombinant form. Methods: Patients with recent onset typical anti-NMDAR encephalitis were subjected to flow cytometry analysis of the peripheral and intrathecal immune response before, during, and after immunotherapy...
November 2017: Annals of Clinical and Translational Neurology
https://www.readbyqxmd.com/read/29150045/spectrum-of-benzo-a-pyrene-induced-mutations-in-the-pig-a-gene-of-l5178ytk-cells-identified-with-next-generation-sequencing
#18
Javier Revollo, Yiying Wang, Page McKinzie, Azra Dad, Mason Pearce, Robert H Heflich, Vasily N Dobrovolsky
We used Sanger sequencing and next generation sequencing (NGS) for analysis of mutations in the endogenous X-linked Pig-a gene of clonally expanded L5178YTk(+/-) cells. The clones developed from single cells that were sorted on a flow cytometer based upon the expression pattern of the GPI-anchored marker, CD90, on their surface. CD90-deficient and CD90-proficient cells were sorted from untreated cultures and CD90-deficient cells were sorted from cultures treated with benzo[a]pyrene (B[a]P). Pig-a mutations were identified in all clones developed from CD90-deficient cells; no Pig-a mutations were found in clones of CD90-proficient cells...
December 2017: Mutation Research
https://www.readbyqxmd.com/read/29149987/inhibition-of-porcine-endogenous-retrovirus-by-multi-targeting-micro-rna-against-long-terminal-region
#19
H-C Chung, V-G Nguyen, W-T Oh, T-M-L Huynh, H-J Moon, J-H Lee, H-K Kim, S-J Park, B-K Park
BACKGROUND: There might be much benefit in xenotransplantation, however, the risk of infections across species barriers remains, especially porcine endogenous retrovirus (PERV). To date, many attempts have been made to knock down active PERVs by inhibitory RNA (RNAi) and micro RNA (miRNA), which target different genes of PERV. There are a few studies that have explored whether targeting promoter regions of PERV could exert an inhibition effect. METHODS: miRNAs were automatically selected based on an online program BLOCK-iT RNAi Designer...
November 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/29118244/isolation-and-characterization-of-antigen-specific-plasmablasts-using-a-novel-flow-cytometry-based-ig-capture-assay
#20
Christopher L Pinder, Sven Kratochvil, Deniz Cizmeci, Luke Muir, Yanping Guo, Robin J Shattock, Paul F McKay
We report the development of a novel flow cytometry-based Ig capture assay (ICA) for the identification and sorting of individual Ab-secreting cells based on their Ag reactivity. The ICA represents a fast and versatile tool for single-cell sorting of peripheral plasmablasts, streamlining subsequent Ab analysis, and cloning. We demonstrate the utility of the assay by isolating Ag-reactive plasmablasts from cryopreserved PBMC obtained from volunteers vaccinated with a recombinant HIV envelope protein. To show the specificity of the ICA, we produced Ag-specific Abs from these cells and subsequently verified their Ag reactivity via ELISA...
November 8, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
keyword
keyword
89967
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"