The adaptive immune response critically hinges on the functionality of T cell receptors, governed by complex molecular mechanisms, including ubiquitination. In this study, we delved into the role of in T cell immunity, focusing on T cell-B cell conjugate formation and T cell activation. Using a CRISPR-Cas9 screening approach targeting deubiquitinases genes in Jurkat T cells, we identified BAP1 as a key positive regulator of T cell-B cell conjugate formation. Subsequent investigations into BAP1 knockout cells revealed impaired T cell activation, evidenced by decreased MAPK and NF-kB signaling pathways and reduced CD69 expression upon T cell receptor stimulation. Flow cytometry and qPCR analyses demonstrated that BAP1 deficiency leads to decreased surface expression of T cell receptor complex components and reduced mRNA levels of the co-stimulatory molecule CD28. Notably, the observed phenotypes associated with BAP1 knockout are specific to T cells and fully dependent on BAP1 catalytic activity. In-depth RNA-seq and mass spectrometry analyses further revealed that BAP1 deficiency induces broad mRNA and protein expression changes. Overall, our findings elucidate the vital role of BAP1 in T cell biology, especially in T cell-B cell conjugate formation and T cell activation, offering new insights and directions for future research in immune regulation.

• Klíčová slova
• BAP1, CRISPR-Cas9 screening, T cell activation, T cell receptor (TCR), T cell-B cell conjugates,
• MeSH
• aktivace lymfocytů * imunologie   MeSH
• B-lymfocyty * imunologie   metabolismus   MeSH
• Jurkat buňky MeSH
• lidé MeSH
• nádorové supresorové proteiny * metabolismus   genetika   MeSH
• receptory antigenů T-buněk * metabolismus   MeSH
• signální transdukce MeSH
• T-lymfocyty * imunologie   metabolismus   MeSH
• thiolesterasa ubikvitinu * genetika   metabolismus   nedostatek   MeSH
• Check Tag
• lidé MeSH
• Publikační typ
• časopisecké články MeSH
• Názvy látek
• BAP1 protein, human MeSH Prohlížeč
• nádorové supresorové proteiny * MeSH
• receptory antigenů T-buněk * MeSH
• thiolesterasa ubikvitinu * MeSH

Chimeric antigen receptors are synthetic, genetically modified receptors of T-cells. The introduction of chimeric antigen receptors into autologous patient T-cells can redirect the lymphocytes to specific antigen targets on the surface of malignant cells. This has recently emerged as an intriguing therapy approach in both hematologic malignancies and later also in solid tumors. Various chimeric antigen receptor designs and manufacturing processes were developed and seem to have a strong impact on the activity of chimeric antigen receptor T-lymphocytes and thereby the therapy success. The individual variables are currently being tested in numerous clinical trials. In this review, I will briefly describe the principle, basic structure and construction of chimeric antigen receptor T-lymphocytes.

• MeSH
• genetická terapie * MeSH
• lidé MeSH
• nádory terapie   MeSH
• receptory antigenů T-buněk genetika   MeSH
• rekombinantní fúzní proteiny genetika   MeSH
• T-lymfocyty imunologie   metabolismus   MeSH
• Check Tag
• lidé MeSH
• Publikační typ
• anglický abstrakt MeSH
• časopisecké články MeSH
• přehledy MeSH
• Názvy látek
• receptory antigenů T-buněk MeSH
• rekombinantní fúzní proteiny MeSH

Cancer immunotherapies utilizing genetically engineered T cells have emerged as powerful personalized therapeutic agents showing dramatic preclinical and clinical results, particularly in hematological malignancies. Ectopically expressed chimeric antigen receptors (CARs) reprogram immune cells to target and eliminate cancer. However, CAR T cell therapy's success depends on the balance between effective anti-tumor activity and minimizing harmful side effects. To improve CAR T cell therapy outcomes and mitigate associated toxicities, scientists from different fields are cooperating in developing next-generation products using the latest molecular cell biology and synthetic biology tools and technologies. The immunotherapy field is rapidly evolving, with new approaches and strategies being reported at a fast pace. This comprehensive literature review aims to provide an up-to-date overview of the latest developments in controlling CAR T cell activity for improved safety, efficacy, and flexibility.

• Klíčová slova
• CAR, Cancer, Cell therapy, Chimeric antigen receptor, Immunotherapy, Regulation, Synthetic, T cell,
• MeSH
• chimerické antigenní receptory * MeSH
• imunoterapie adoptivní škodlivé účinky   metody   MeSH
• imunoterapie MeSH
• lidé MeSH
• nádory * terapie   MeSH
• receptory antigenů T-buněk MeSH
• T-lymfocyty MeSH
• Check Tag
• lidé MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH
• přehledy MeSH
• Názvy látek
• chimerické antigenní receptory * MeSH
• receptory antigenů T-buněk MeSH

INTRODUCTION: Cutaneous T-cell lymphoid infiltrate can represent reactive lesion or a malignant T-cell lymphoma. However, clinical and histopathological appearance can overlap in both groups with a risk of misdiagnosis. Aberrant expression of T-cell markers is not always applicable and T-cell receptor (TCR) gene rearrangement is not always accessible and diagnosis in borderline cases can be challenging. AIMS: Several types of TCR antibodies are currently available with limited knowledge of their expression in different cutaneous lymphoid infiltrates. Aim of the study is a comparison of expression of TCR antibodies in benign and malignant lymphoid infiltrates and their utility in borderline cases. METHODS: Representative cases of reactive and malignant lymphoproliferations were collected. Separate group of lesions with borderline morphology was selected for comparison. Immunohistochemical expression of TCR-V-betaF1 (TCRBF1), TCR-C-beta1 (TCRJOVI.1), TCR gamma/delta (TCRGD) and TCR delta (TCRD) was performed in all cases. TCR gene rearrangement evaluation was performed in all cases using PCR BIOMED-2 assay. RESULTS: Benign lymphoid infiltrates were all negative in TCRD and TCRGD. Expression of TCRJOVI.1 was seen in 3/10 cases and TCRBF1 in one. T-cell lymphomas were positive for TCRBF1 and TCRGD in 60% and 30% of cases respectively. TCR gene rearrangement was confirmed in 90% of lymphoma cases. All benign lesions were polyclonal. Morphologically borderline lesions showed expression of TCRBF1 in 6/10 cases and TCR gene rearrangement in 4/10 cases. Re-evaluation of the cases and clinical correlation led to the change of the diagnosis and confirmation of T-cell lymphoma in 4/10 cases. CONCLUSIONS: Expression of TCRBF1 and TCR-gene rearrangement was significantly associated with malignant infiltrates. TCRBF1 positivity in borderline cutaneous lymphoproliferations can raise the suspicion of malignancy but confirmation by TCR gene rearrangement and careful clinical correlation is still advisable.

• Klíčová slova
• Cutaneous lymphoma, Cutaneous lymphoproliferation, Inflammatory dermatosis, TCR rearrangement,
• MeSH
• antigeny CD7 analýza   MeSH
• diferenciální diagnóza MeSH
• dospělí MeSH
• genová přestavba T-lymfocytů * MeSH
• imunohistochemie * MeSH
• kožní T-buněčný lymfom genetika   imunologie   patologie   MeSH
• kůže imunologie   metabolismus   MeSH
• lidé středního věku MeSH
• lidé MeSH
• lymfoproliferativní nemoci genetika   imunologie   patologie   MeSH
• prediktivní hodnota testů MeSH
• protilátky imunologie   MeSH
• receptory antigenů T-buněk alfa-beta analýza   genetika   MeSH
• receptory antigenů T-buněk gama-delta analýza   genetika   MeSH
• senioři MeSH
• specificita protilátek MeSH
• Check Tag
• dospělí MeSH
• lidé středního věku MeSH
• lidé MeSH
• mužské pohlaví MeSH
• senioři MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH
• srovnávací studie MeSH
• Názvy látek
• antigeny CD7 MeSH
• protilátky MeSH
• receptory antigenů T-buněk alfa-beta MeSH
• receptory antigenů T-buněk gama-delta MeSH

BACKGROUND AND AIMS: Intestinal inflammation in inflammatory bowel diseases [IBD] is thought to be T cell mediated and therefore dependent on the interaction between the T cell receptor [TCR] and human leukocyte antigen [HLA] proteins expressed on antigen presenting cells. The collection of all TCRs in one individual, known as the TCR repertoire, is characterised by enormous diversity and inter-individual variability. It was shown that healthy monozygotic [MZ] twins are more similar in their TCR repertoire than unrelated individuals. Therefore MZ twins, concordant or discordant for IBD, may be useful to identify disease-related and non-genetic factors in the TCR repertoire which could potentially be used as disease biomarkers. METHODS: Employing unique molecular barcoding that can distinguish between polymerase chain reaction [PCR] artefacts and true sequence variation, we performed deep TCRα and TCRβ repertoire profiling of the peripheral blood of 28 MZ twin pairs from Denmark and Germany, 24 of whom were discordant and four concordant for IBD. RESULTS: We observed disease- and smoking-associated traits such as sharing, diversity and abundance of specific clonotypes in the TCR repertoire of IBD patients, and particularly in patients with active disease, compared with their healthy twins. CONCLUSIONS: Our findings identified TCR repertoire features specific for smokers and IBD patients, particularly when signs of disease activity were present. These findings are a first step towards the application of TCR repertoire analyses as a valuable tool to characterise inflammatory bowel diseases and to identify potential biomarkers and true disease causes.

• Klíčová slova
• T cell receptor [TCR] repertoire, inflammatory bowel diseases [IBD], monozygotic twins,
• MeSH
• C-reaktivní protein analýza   MeSH
• Crohnova nemoc * diagnóza   imunologie   patofyziologie   MeSH
• dospělí MeSH
• dvojčata monozygotní MeSH
• feces MeSH
• geny TcR alfa * MeSH
• geny TcR beta * MeSH
• kouření imunologie   MeSH
• leukocytární L1-antigenní komplex analýza   MeSH
• lidé MeSH
• posouzení stavu pacienta MeSH
• receptory antigenů T-buněk alfa-beta krev   MeSH
• sekvenční analýza DNA MeSH
• ulcerózní kolitida * diagnóza   imunologie   patofyziologie   MeSH
• Check Tag
• dospělí MeSH
• lidé MeSH
• mužské pohlaví MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH
• studie na dvojčatech MeSH
• Geografické názvy
• Dánsko MeSH
• Německo MeSH
• Názvy látek
• C-reaktivní protein MeSH
• leukocytární L1-antigenní komplex MeSH
• receptory antigenů T-buněk alfa-beta MeSH

OBJECTIVE: One of the current hypotheses to explain the proinflammatory immune response in IBD is a dysregulated T cell reaction to yet unknown intestinal antigens. As such, it may be possible to identify disease-associated T cell clonotypes by analysing the peripheral and intestinal T-cell receptor (TCR) repertoire of patients with IBD and controls. DESIGN: We performed bulk TCR repertoire profiling of both the TCR alpha and beta chains using high-throughput sequencing in peripheral blood samples of a total of 244 patients with IBD and healthy controls as well as from matched blood and intestinal tissue of 59 patients with IBD and disease controls. We further characterised specific T cell clonotypes via single-cell RNAseq. RESULTS: We identified a group of clonotypes, characterised by semi-invariant TCR alpha chains, to be significantly enriched in the blood of patients with Crohn's disease (CD) and particularly expanded in the CD8+ T cell population. Single-cell RNAseq data showed an innate-like phenotype of these cells, with a comparable gene expression to unconventional T cells such as mucosal associated invariant T and natural killer T (NKT) cells, but with distinct TCRs. CONCLUSIONS: We identified and characterised a subpopulation of unconventional Crohn-associated invariant T (CAIT) cells. Multiple evidence suggests these cells to be part of the NKT type II population. The potential implications of this population for CD or a subset thereof remain to be elucidated, and the immunophenotype and antigen reactivity of CAIT cells need further investigations in future studies.

• Klíčová slova
• Crohn's disease, IBD, T-cell receptor, alpha beta T cells, mucosal immunology,
• MeSH
• CD8-pozitivní T-lymfocyty MeSH
• Crohnova nemoc * genetika   MeSH
• lidé MeSH
• NKT buňky * MeSH
• receptory antigenů T-buněk alfa-beta genetika   MeSH
• receptory antigenů T-buněk metabolismus   MeSH
• Check Tag
• lidé MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH
• Názvy látek
• receptory antigenů T-buněk alfa-beta MeSH
• receptory antigenů T-buněk MeSH

Transcriptome sequencing has become common in cancer research, resulting in the generation of a substantial volume of RNA sequencing (RNA-Seq) data. The ability to extract immune repertoires from these data is crucial for obtaining information on infiltrating T- and B-lymphocyte clones when dedicated amplicon T-cell/B-cell receptors sequencing (TCR-Seq/BCR-Seq) methods are unavailable. In response to this demand, several dedicated computational methods have been developed, including MiXCR, TRUST and ImRep. In the recent publication in Briefings in Bioinformatics, Peng et al. have conducted an intensive, systematic comparison of the three previously mentioned tools. Although their effort is commendable, we do have a few constructive critiques regarding technical elements of their analysis.

• Klíčová slova
• RNA sequencing, T-cell receptor, TCR sequencing, benchmarking, cancer immunology, computational methods, immunogenomics,
• MeSH
• B-lymfocyty MeSH
• benchmarking * MeSH
• lidé MeSH
• nádory * genetika   MeSH
• receptory antigenů T-buněk genetika   MeSH
• sekvenční analýza RNA MeSH
• Check Tag
• lidé MeSH
• Publikační typ
• časopisecké články MeSH
• Názvy látek
• receptory antigenů T-buněk MeSH

Monitoring the T cell receptor (TCR) repertoire in health and disease can provide key insights into adaptive immune responses, but the accuracy of current TCR sequencing (TCRseq) methods is unclear. In this study, we systematically compared the results of nine commercial and academic TCRseq methods, including six rapid amplification of complementary DNA ends (RACE)-polymerase chain reaction (PCR) and three multiplex-PCR approaches, when applied to the same T cell sample. We found marked differences in accuracy and intra- and inter-method reproducibility for T cell receptor α (TRA) and T cell receptor β (TRB) TCR chains. Most methods showed a lower ability to capture TRA than TRB diversity. Low RNA input generated non-representative repertoires. Results from the 5' RACE-PCR methods were consistent among themselves but differed from the RNA-based multiplex-PCR results. Using an in silico meta-repertoire generated from 108 replicates, we found that one genomic DNA-based method and two non-unique molecular identifier (UMI) RNA-based methods were more sensitive than UMI methods in detecting rare clonotypes, despite the better clonotype quantification accuracy of the latter.

• MeSH
• dospělí MeSH
• Jurkat buňky MeSH
• lidé středního věku MeSH
• lidé MeSH
• počítačová simulace MeSH
• receptory antigenů T-buněk alfa-beta genetika   MeSH
• receptory antigenů T-buněk genetika   MeSH
• reprodukovatelnost výsledků MeSH
• vysoce účinné nukleotidové sekvenování metody   MeSH
• zkreslení výsledků (epidemiologie) MeSH
• Check Tag
• dospělí MeSH
• lidé středního věku MeSH
• lidé MeSH
• mužské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH
• Research Support, N.I.H., Intramural MeSH
• Názvy látek
• receptory antigenů T-buněk alfa-beta MeSH
• receptory antigenů T-buněk MeSH

BACKGROUND: Chimeric antigen receptor (CAR) T cell therapy has been gradually building its position in the treatment of hematological malignancies. Currently, there are three types of autologous anti-CD19 CAR-T cells approved for the treatment of selected relapsed B cell non-Hodgkins lymphomas and acute B-lymphoblastic leukemia in the Czech Republic. Additional clinical trials are ongoing to evaluate CAR-T cell therapy that targets other tumor-specific antigens. It is expected that some of these CAR-T cells will be approved for the treatment of other hemato-oncological dia-gnoses in the near future. Manufacturing and management of CAR-T cell therapy have been optimized. European Society for Blood and Marrow Transplantation and American Society for Transplantation and Cellular Therapy have updated their recommendations for the management and treatment of early CAR-T cell toxicity based on valuable experience gained during several years. Nevertheless, late toxicity remains an issue. It is crucial for patients undergoing this highly specific therapy to stay in follow-up for several decades. Intensive research and development have been devoted to manufacturing new CAR constructs with higher efficacy and lesser toxicity. A significant improvement in the availability of this, otherwise very expensive treatment, is expected from universal allogeneic T cells that will express CAR binding to tumor-specific antigen. PURPOSE: This review is focused on the preparation and administration of autologous CAR-T lymphocytes.

• Klíčová slova
• chimeric antigen receptor, chimeric antigen receptor T cells, immunotherapy, immunother­apy,
• MeSH
• antigeny CD19 MeSH
• buněčná a tkáňová terapie MeSH
• chimerické antigenní receptory * MeSH
• imunoterapie adoptivní škodlivé účinky   MeSH
• lidé MeSH
• receptory antigenů T-buněk metabolismus   terapeutické užití   MeSH
• Check Tag
• lidé MeSH
• Publikační typ
• časopisecké články MeSH
• přehledy MeSH
• Názvy látek
• antigeny CD19 MeSH
• chimerické antigenní receptory * MeSH
• receptory antigenů T-buněk MeSH

The diversity of T-cell receptors recognizing foreign pathogens is generated through a highly stochastic recombination process, making the independent production of the same sequence rare. Yet unrelated individuals do share receptors, which together constitute a "public" repertoire of abundant clonotypes. The TCR repertoire is initially formed prenatally, when the enzyme inserting random nucleotides is downregulated, producing a limited diversity subset. By statistically analyzing deep sequencing T-cell repertoire data from twins, unrelated individuals of various ages, and cord blood, we show that T-cell clones generated before birth persist and maintain high abundances in adult organisms for decades, slowly decaying with age. Our results suggest that large, low-diversity public clones are created during pre-natal life, and survive over long periods, providing the basis of the public repertoire.

• MeSH
• antigenní specifita receptorů T-buněk genetika   MeSH
• dvojčata monozygotní genetika   MeSH
• genetická variace genetika   MeSH
• genová přestavba T-lymfocytů genetika   MeSH
• kultivované buňky MeSH
• lidé MeSH
• molekulární sekvence - údaje MeSH
• receptory antigenů T-buněk fyziologie   MeSH
• rekombinace genetická MeSH
• sekvence nukleotidů MeSH
• stárnutí genetika   imunologie   MeSH
• vývojová regulace genové exprese genetika   imunologie   MeSH
• Check Tag
• lidé MeSH
• Publikační typ
• časopisecké články MeSH
• Názvy látek
• receptory antigenů T-buněk MeSH