81,830 results match your criteria lymphocyte proliferation


Mechanisms driving neutrophil-induced T-cell immunoparalysis in ovarian cancer.

Cancer Immunol Res 2021 May 14. Epub 2021 May 14.

Medicine and Immunology, Roswell Park Cancer Institute

T-cell activation and expansion in the tumor microenvironment (TME) are critical for antitumor immunity. Neutrophils in the TME acquire a complement-dependent T-cell suppressor phenotype that is characterized by inhibition of T-cell proliferation and activation through mechanisms distinct from those of myeloid-derived suppressor cells. In this study, we used ascites fluid supernatants (ASC) from patients with ovarian cancer as an authentic component of the TME to evaluate the effects of ASC on neutrophil function and mechanisms for neutrophil-driven immune suppression. Read More

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Genome-wide DNA methylome and whole-transcriptome landscapes of spontaneous intraductal papilloma in tree shrews.

Ann Transl Med 2021 Apr;9(8):688

The Center of Tree Shrew Germplasm Resources, Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, China.

Background: Breast intraductal papilloma (IP) is mainly caused by the abnormal proliferation of ductal epithelial cells. Tree shrews have potential as an animal model for the study of breast tumours; however, little is known regarding the transcriptome and DNA methylome landscapes of breast IP in tree shrews. In this research, we conducted whole-genome DNA methylation and transcriptome analyses of breast IP and normal mammary glands in tree shrews. Read More

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Tumor-Derived Exosomes Enriched by miRNA-124 Promote Anti-tumor Immune Response in CT-26 Tumor-Bearing Mice.

Front Med (Lausanne) 2021 27;8:619939. Epub 2021 Apr 27.

Department of Immunology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.

Exosomes have been introduced as a new alternative delivery system for the transmission of small molecules. Tumor-derived exosomes (TEXs) not only contain tumor-associated antigens to stimulate antitumor immune responses but also act as natural carriers of microRNAs. The aim of the current study was to evaluate the efficacy of miR-124-3p-enriched TEX (TEXomiR) as cell-free vaccine in the induction of antitumor immune responses in a mouse model of colorectal cancer. Read More

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Ex vivo expansion of dysfunctional regulatory T lymphocytes restores suppressive function in Parkinson's disease.

NPJ Parkinsons Dis 2021 May 13;7(1):41. Epub 2021 May 13.

Department of Neurology, Houston Methodist Neurological Institute, Houston Methodist Research Institute, Houston Methodist Hospital, Houston, TX, USA.

Inflammation is a pathological hallmark of Parkinson's disease (PD). Chronic pro-inflammatory responses contribute to the loss of neurons in the neurodegenerative process. The present study was undertaken to define the peripheral innate and adaptive immune contributions to inflammation in patients with PD. Read More

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Consumption pattern and genotoxic potential of various smokeless tobacco products in Assam, India: A public health concern.

Mutat Res 2021 Jun 16;866:503349. Epub 2021 Mar 16.

Molecular and Cell Biology Laboratory, Department of Life Science and Bioinformatics, Assam University, Silchar, 788011, India. Electronic address:

Smokeless tobacco (SLT) consumption is presumed to be one of the major causes of high incidence of oral cancer in India. The present study aimed to document various types of SLT products consumed and their potential impact on the genome instability on the population from Assam state in Northeast India. A cross-sectional study (n = 5000) showed that 60. Read More

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Macrophage activation syndrome in systemic juvenile idiopathic arthritis.

Authors:
Masaki Shimizu

Immunol Med 2021 May 13:1-9. Epub 2021 May 13.

Department of Child Health and Development, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.

Macrophage activation syndrome (MAS) is a severe, potentially life-threatening complication of systemic juvenile idiopathic arthritis (s-JIA). An immunological feature is the excessive activation and proliferation of T lymphocytes and macrophages. Massive hypercytokinemia is strongly associated with its pathogenesis, particularly the overproduction of interleukin (IL)-1, IL-6 and IL-18; interferon (IFN)-γ; and tumor necrosis factor (TNF)-α. Read More

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Effects of extract on learning and memory ability, brain tissue morphology, and immune function of aging mice.

Open Life Sci 2021 23;16(1):399-407. Epub 2021 Apr 23.

Department of Pharmacy, Luohe Medical College, Luohe 462000, China.

In this study, we aimed to observe the effects of (LC) extract on learning and memory ability, brain tissue morphology, and immune function of aging mice. Kunming mice were selected and randomly divided into a control group, a positive control group, an aging group, and three dose groups. Three dose groups were administered 187. Read More

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IL-6 Promotes the Proliferation and Immunosuppressive Function of Myeloid-Derived Suppressor Cells via the MAPK Signaling Pathway in Bladder Cancer.

Biomed Res Int 2021 23;2021:5535578. Epub 2021 Apr 23.

Department of Urology, Shanghai General Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.

Muscle-invasive bladder cancer (MIBC) is characterized by a highly complex immune environment, which is not well understood. Interleukin-6 (IL-6) is generated and secreted by multifarious types of cells, including tumor cells. This study was aimed at demonstrating that the levels of IL-6 and the number of myeloid-derived suppressor cells (MDSCs), with a positive correlation between them, increased in MIBC tissues, promoting MIBC cell proliferation, especially in patients with recurrence. Read More

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Bioinformatic prediction and identification of immunogenic epitopes of the antigenic 14-3-3 protein of Echinococcus multilocularis.

Acta Trop 2021 May 9:105955. Epub 2021 May 9.

Research Center for High Altitude Medicine, Qinghai University, Xining 810001, China; Qinghai-Utah Joint Research Key Lab for High Altitude Medicine, Xining 810001, China; Basic Medicine Department, Qinghai University, Xining 810001, China. Electronic address:

Introduction: Alveolar echinococcosis is a high-risk parasitic disease caused by the larval stage of Echinococcus multilocularis. The study aimed to predict and identify the dominant Th1/Th2 and B cell epitopes of the antigen protein 14-3-3 beta:alpha from Echinococcus multilocularis.

Methods: A comparison of the four amino acid sequences of 14-3-3 beta:alpha was respectively derived from Echinococcus multilocularis, Rattus norvegicus, Canis lupus familiaris, and Homo sapiens was carried out by CLUSTALW to provide a basis for excluding similar epitopes. Read More

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Nigella sativa oil inhibits proliferation and stimulates apoptosis of human lymphocytes in vitro.

Hum Immunol 2021 May 8. Epub 2021 May 8.

Department of Pathophysiology, Faculty of Medicine, Medical University of Gdansk, Poland.

The study aimed to examine the in vitro influence of Nigella sativa oil on human lymphocytes. Cells were stimulated with a monoclonal anti-CD3 antibody in the presence of serial oil ethanol dilutions. Then their proliferation and apoptosis rates were assessed using flow cytometry. Read More

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Cross-talk between hepatic stellate cells and T lymphocytes in liver fibrosis.

Hepatobiliary Pancreat Dis Int 2021 Apr 28. Epub 2021 Apr 28.

Research Center of Chinese Health Ministry on Transplantation Medicine Engineering and Technology, the Third Xiangya Hospital of Central South University, Changsha 410003, China. Electronic address:

Background: Fibrosis results from inflammation and healing following injury. The imbalance between extracellular matrix (ECM) secretion and degradation leads to the ECM accumulation and liver fibrosis. This process is regulated by immune cells. Read More

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Protein expression and purification of G-protein coupled receptor kinase 6 (GRK6), toward structure-based drug design and discovery for multiple myeloma.

Protein Expr Purif 2021 May 7:105890. Epub 2021 May 7.

Center for Applied Structural Discovery, Biodesign Institute at Arizona State University, Tempe, AZ, 85281, USA; School of Molecular Sciences, Arizona State University, Tempe, AZ, 85287, USA. Electronic address:

Human G-protein coupled receptor kinase 6 (GRK6) belongs to the GRK4 kinase subfamily of the G protein-coupled receptor kinase family which comprises of GRK1, GRK2, and GRK4. These kinases phosphorylate ligand-activated G-protein coupled receptors (GPCRs), driving heterotrimeric G protein coupling, desensitization of GPCR, and β-arrestin recruitment. This reaction series mediates cellular signal pathways for cell survival, proliferation, migration and chemotaxis. Read More

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Usnic acid suppresses cervical cancer cell proliferation by inhibiting PD-L1 expression and enhancing T-lymphocyte tumor-killing activity.

Phytother Res 2021 May 10. Epub 2021 May 10.

Molecular Medicine Research Center, College of Pharmacy, Yanbian University, Yanji, China.

The programmed cell death 1 (PD-1)/programmed death ligand 1 (PD-L1) pathway is abnormally expressed in cervical cancer cells. Moreover, PD-1/PD-L1 blockade reduces the apoptosis and exhaustion of T cells and inhibits the development of malignant tumors. Usnic acid is a dibenzofuran compound originating from Usnea diffracta Vain and has anti-inflammatory, antifungal, and anticancer activities. Read More

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Effects of Bacillus subtilis iturin A on HepG2 cells in vitro and vivo.

AMB Express 2021 May 10;11(1):67. Epub 2021 May 10.

Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, 127 Youyi West Road, Xi'an, 710072, Shaanxi, China.

Iturin A with cyclic peptide and fatty acid chain isolated from Bacillus subtilis fermentation shows a variety of biological activities. Among them, the anticancer activity attracted much attention. However, the molecular mechanism of its inhibitory effect on hepatocellular carcinoma was still unclear. Read More

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A possible way to prevent the progression of bone lesions in multiple myeloma via Src-homology-region-2-domain-containing-phosphatase-1 activation.

J Cell Biochem 2021 May 10. Epub 2021 May 10.

Department of Molecular Immunology and Inflammation, Research Institute National Center for Global Health and Medicine, Tokyo, Japan.

On the basis of our recent findings, in which multiple receptor-mediated mast cell functions are regulated via a common signaling cascade, we posit that the formation and functioning of osteoclasts are also controlled by a similar common mechanism. These cells are derived from the same granulocyte/monocyte progenitors and share multiple receptors except those that are cell-specific. In both types of cells, all known receptors reside in lipid rafts, form multiprotein complexes with recruited signaling molecules, and are internalized upon receptor engagement. Read More

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Development of Donor Recipient Chimeric Cells of bone marrow origin as a novel approach for tolerance induction in transplantation.

Stem Cell Investig 2021 19;8. Epub 2021 Apr 19.

Department of Orthopaedics, University of Illinois at Chicago, Chicago, IL, USA.

Background: Cell therapies and chimerism-based strategies are currently the most successful approach for tolerance induction in transplantation. This study aimed to establish and characterize novel Donor Recipient Chimeric Ccell (DRCC) therapy of bone marrow (BM) origin presenting donor-recipient phenotype to support tolerance induction.

Methods: fusions of fully MHC-mismatched BM cells from ACI (RT1) and Lewis (RT1) rats were performed using polyethylene-glycol (PEG). Read More

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Small Molecule Cyclotriazadisulfonamide Abrogates the Upregulation of the Human Receptors CD4 and 4-1BB and Suppresses In Vitro Activation and Proliferation of T Lymphocytes.

Front Immunol 2021 21;12:650731. Epub 2021 Apr 21.

KU Leuven Department of Microbiology, Immunology and Transplantation, Laboratory of Virology and Chemotherapy, Rega Institute, Leuven, Belgium.

The small molecule cyclotriazadisulfonamide (CADA) down-modulates the human CD4 receptor, an important factor in T cell activation. Here, we addressed the immunosuppressive potential of CADA using different activation models. CADA inhibited lymphocyte proliferation with low cellular toxicity in a mixed lymphocyte reaction, and when human PBMCs were stimulated with CD3/CD28 beads, phytohemagglutinin or anti-CD3 antibodies. Read More

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[The role of regulatory T cells in multiple myeloma progression].

Authors:
Yawara Kawano

Rinsho Ketsueki 2021 ;62(4):299-304

Department of Hematology, Rheumatology, and Infectious Disease, Graduate School of Medical Sciences, Faculty of Life Sciences, Faculty of Life Sciences, Kumamoto University.

Regulatory T cells (Tregs) are a subset of CD4+ T lymphocytes that suppress the functions of antigen-presenting cells and effector T cells, characterized by the expression of transcription factor forkhead box P3 (FOXP3). Recent studies have reported an increase in the number of Tregs in the bone marrow (BM) of multiple myeloma (MM) patients. However, the role and mechanisms of Treg accumulation in the BM of MM patients remain debatable. Read More

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Paeoniflorin attenuates the allergic contact dermatitis response via inhibiting the IFN-γ production and the NF-κB/IκBα signaling pathway in T lymphocytes.

Int Immunopharmacol 2021 May 6;96:107687. Epub 2021 May 6.

Department of Dermatology, The Second Hospital of Dalian Medical University, Dalian, China; Institute (College) of Integrative Medicine, Dalian Medical University, Dalian, China. Electronic address:

Paeoniflorin (PF) has been demonstrated to have an anti-allergic and anti-inflammatory effect in the treatment of allergic contact dermatitis (ACD). However, its clinical application is hampered by the lacking of comprehensive mechanical explanation. This research aimed to study the effect of PF on the proliferation, apoptosis and cytokines secretion as well as the expression of nuclear factor-kappa B (NF-κB) and mitogen-activated protein kinase (MAPK) signaling pathways of T lymphocytes activation in vitro and in vivo. Read More

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Structures and anti-melanoma activities of two polysaccharides from Angelica sinensis (Oliv.) Diels.

Int J Biol Macromol 2021 May 6;183:972-981. Epub 2021 May 6.

Shaanxi Key Laboratory of Natural Products & Chemical Biology, School of Chemistry & Pharmacy, Northwest A&F University, Yangling 712100, China; Department of Pharmacology and Key Laboratory of Gastrointestinal Pharmacology of Chinese Materia Medica of the State Administration of Traditional Chinese Medicine, School of Pharmacy, Fourth Military Medical University, Xi'an, China. Electronic address:

Polysaccharide is one of the necessary macromolecules in life activities, and it is also a very promising natural product for tumor prevention and treatment. In this study, two homogeneous polysaccharides (APS-4I and APS-4II) were isolated from Angelica sinensis (Oliv.) Diels. Read More

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Loss of Cxcr4 in Endometriosis Reduces Proliferation and Lesion Number while Increasing Intraepithelial Lymphocyte Infiltration.

Am J Pathol 2021 May 5. Epub 2021 May 5.

Department of Obstetrics, Gynecology, & Reproductive Medicine, Yale School of Medicine, New Haven, CT, USA.

Hyperactivation of the CXCL12-CXCR4 axis occurs in endometriosis; the therapeutic potential of treatments aimed at global inhibition of the axis was recently demonstrated. As CXCR4 is predominantly expressed on epithelial cells in the uterus, our aim was to explore the effects of targeted disruption of CXCR4 in endometriosis lesions. Uteri derived from adult female mice homozygous for a floxed allele of CXCR4 and co-expressing Cre recombinase under control of progesterone receptor were sutured onto the peritoneum of cycling GFP+ host mice. Read More

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Medulloblastoma recurrence and metastatic spread are independent of colony-stimulating factor 1 receptor signaling and macrophage survival.

J Neurooncol 2021 May 8. Epub 2021 May 8.

Division of Hematology/Oncology, Department of Pediatrics, Seattle Children's Hospital, University of Washington, Seattle, WA, USA.

Purpose: Tumor infiltration by immunosuppressive myeloid cells or tumor-associated macrophages (TAMs) contributes to tumor progression and metastasis. In contrast to their adult counterparts, higher TAM signatures do not correlate with aggressive tumor behavior in pediatric brain tumors. While prominent TAM infiltrates exist before and after radiation, the degree to which irradiated macrophages and microglia support progression or leptomeningeal metastasis remains unclear. Read More

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Prognostic and therapeutic role of tumor-infiltrating lymphocyte subtypes in breast cancer.

Cancer Metastasis Rev 2021 May 7. Epub 2021 May 7.

PDX Pharmaceuticals, Inc., Portland, OR, USA.

Increased levels of total tumor-infiltrating lymphocytes (TILs) are generally associated with good prognosis in several breast cancer subtypes. Subtypes of TILs impact both tumor cells and immune cells in a variety of different ways, leading to either a pro-tumor or antitumor effect. Tumor-infiltrating CD8 T cells and natural killer (NK) cells perform as effector cells against tumor cells and are associated with better clinical outcome. Read More

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HHLA2 predicts better survival and exhibits inhibited proliferation in epithelial ovarian cancer.

Cancer Cell Int 2021 May 7;21(1):252. Epub 2021 May 7.

Department of Gynecologic Oncology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Yingfeng Road No.33, Haizhu District, Guangzhou, Guangdong, China.

Purpose: The role of HHLA2, a new immune checkpoint ligand, is gradually being elucidated in various solid tumours. However, its role in ovarian cancer remains unclear; thus, its expression profile and clinical significance in ovarian cancer must be examined.

Methods: We performed immunohistochemistry to examine HHLA2 expression in 64 ovarian cancer tissues and 16 normal ovarian tissues. Read More

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Suppression of the Immune Response by Syngeneic Splenocytes Adoptively Transferred to Sublethally Irradiated Mice.

Acta Naturae 2021 Jan-Mar;13(1):116-126

Core Facility Centre, Institute of Gene Biology, Russian Academy of Sciences, Moscow, 119334 Russia.

The peripheral T-cell pool consists of several, functionally distinct populations of CD8 T cells. CD44 and CD62L are among the major surface markers that allow us to define T-cell populations. The expression of these molecules depends on the functional status of a T lymphocyte. Read More

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CXCR4 engagement triggers CD47 internalization and antitumor immunization in a mouse model of mesothelioma.

EMBO Mol Med 2021 May 6:e12344. Epub 2021 May 6.

Chromatin Dynamics Unit, Division of Genetics and Cell Biology, IRCCS San Raffaele Scientific Institute, Milan, Italy.

Boosting antitumor immunity has emerged as a powerful strategy in cancer treatment. While releasing T-cell brakes has received most attention, tumor recognition by T cells is a pre-requisite. Radiotherapy and certain cytotoxic drugs induce the release of damage-associated molecular patterns, which promote tumor antigen cross-presentation and T-cell priming. Read More

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Bone marrow cells are differentiated into MDSCs by BCC-Ex through down-regulating the expression of CXCR4 and activating STAT3 signalling pathway.

J Cell Mol Med 2021 May 6. Epub 2021 May 6.

The National Engineering Research Center for Bioengineering Drugs and the Technologies, Institute of Translational Medicine, Nanchang University, Nanchang, China.

Studies showed that the increase of myeloid-derived suppressor cells (MDSCs) in tumour microenvironment is closely related to the resistant treatment and poor prognosis of metastatic breast cancer. However, the effect of tumour-derived exosomes on MDSCs and its mechanism are not clear. Here, we reported that breast cancer cells (4T1)-secreted exosomes (BCC-Ex) were able to differentiate bone marrow cells into MDSCs and significantly inhibited the proliferation of T lymphocytes to provide an immunosuppressive microenvironment for cancer cells in vivo and in vitro. Read More

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Case report: histopathology and molecular pathology analysis on enteric tissue of a COVID-19 patient.

Diagn Pathol 2021 May 5;16(1):40. Epub 2021 May 5.

Department of Infectious Disease, Shanghai Public Health Clinical center, Fudan University, Shanghai, China.

Aims: Patients with COVID-19 can also have enteric symptoms. Here we analyzed the histopathology of intestinal detachment tissue from a patient with COVID-19.

Methods: The enteric tissue was examined by hematoxylin & eosin stain, PAS (Periodic acid-Schiff) staining, Gram staining, Ziehl-Neelsen stain and Grocott's Methenamine Silver (GMS) Stain. Read More

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Immune response in dairy cattle against combined foot and mouth disease and haemorrhagic septicemia vaccine under field conditions.

BMC Vet Res 2021 May 5;17(1):186. Epub 2021 May 5.

Department of Veterinary Bioscience and Veterinary Public Health, Faculty of Veterinary Medicine, Chiang Mai University, 50100, Chiang Mai, Thailand.

Background: Foot-and-mouth disease (FMD) and Haemorrhagic septicemia (HS) are two important diseases that are known to have caused significant economic losses to the cattle industry. Accordingly, vaccinations have been recognized as an efficient method to control and prevent both of the above-mentioned diseases. This study aimed to determine the immune response to FMD virus antigens and the recombinant outer membrane protein of HS (rOmpH) of Pasteurella multocida in cattle administered as a combination vaccine and compare antibody titers with the two vaccines given independently, under field conditions. Read More

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PD-1 blockade combined with IL-33 enhances the antitumor immune response in a type-1 lymphocyte-mediated manner.

Cancer Treat Res Commun 2021 Apr 23;28:100379. Epub 2021 Apr 23.

Department of Immunology, School of Biology and Basic Medical Sciences, Soochow University, Suzhou 215123, China; Jiangsu Key Laboratory of Clinical Immunology, Soochow University, Suzhou 215006, China; Jiangsu Institute of Clinical Immunology, The First Affiliated Hospital of Soochow University, Suzhou 215006, China. Electronic address:

PD-1 immune checkpoint blockade and cytokine IL-33 have shown significant therapeutic effects in tumor immunotherapy. These therapies promote CD8 T cell activation, proliferation, and effector functions. However, there were few research about the combined therapy efficacy. Read More

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