Biochem Biophys Res Commun
November 2024
Hepatic stellate cells (HSCs) are pericytes of the liver responsible for liver fibrosis and cirrhosis, which are the end stages of chronic liver diseases. TGF-β activates HSCs, leading to the differentiation of myofibroblasts in the process of liver fibrosis. While the heterogeneity of HSCs is appreciated in the fibrotic liver, it remains elusive which HSC subsets mainly contribute to fibrosis.
View Article and Find Full Text PDFThe concept of immune cell exhaustion/dysfunction has developed mainly to understand impaired type 1 immune responses, especially by CD8 T-cells against tumors or virus-infected cells, and has been applied to other lymphocytes. Natural killer (NK) cells and CD4 T cells support the efficient activation of CD8 T cells but exhibit dysfunctional phenotypes in tumor microenvironments and in chronic viral infections. In contrast, the concept of type 2 immune cell exhaustion/dysfunction is poorly established.
View Article and Find Full Text PDFWhile group-2 innate lymphoid cells (ILC2s) are highly proliferative in allergic inflammation, the removal of overactivated ILC2s in allergic diseases has not been investigated. We previously showed that chronic airway allergy induces "exhausted-like" dysfunctional ILC2s expressing T cell immunoreceptor with Ig and ITIM domains (TIGIT). However, the physiological relevance of these cells in chronic allergy remains elusive.
View Article and Find Full Text PDFMitochondrial metabolism is critical in hematopoietic stem cell maintenance and differentiation. Here, we present a step-by-step protocol to efficiently differentiate human induced pluripotent stem cells into myeloid progenitors by a robust feeder- and serum-free system. Furthermore, we provide a protocol to subsequently assess mitochondrial function in iPSC-derived myeloid progenitors.
View Article and Find Full Text PDFThe vertebrate immune system functions to eliminate invading foreign nucleic acids and foreign proteins from infectious diseases and malignant tumors. Because pathogens and cancer cells have unique amino acid sequences and motifs (e.g.
View Article and Find Full Text PDFGroup 2 innate lymphoid cells (ILC2s) reside in peripheral tissues such as the lungs, skin, nasal cavity, and gut and provoke innate type 2 immunity against allergen exposure, parasitic worm infection, and respiratory virus infection by producing T2 cytokines. Recent advances in understanding ILC2 biology revealed that ILC2s can be trained by IL-33 or allergic inflammation, are long-lived, and mount memory-like type 2 immune responses to any other allergens afterwards. In contrast, IL-33, together with retinoic acid, induces IL-10-producing immunosuppressive ILC2s.
View Article and Find Full Text PDFPurpose: This study aimed to clarify the relationship between serum high-density lipoprotein cholesterol (HDL-C) level and incidence of CV events. Moreover, the relationship stratified by gender was evaluated.
Methods: The study database was derived from a multicenter, prospective, cohort study that included 1520 incident dialysis patients in Aichi Prefecture, Japan.
Eye problems are an adverse reaction sometimes found in chemotherapy. Although not life-threatening, they can reduce patients' quality of life. The highest incidence of eye problems is reported for the combination anticancer drug S-1 (tegafur-gimeracil-oteracil), and methods to prevent or treat the eye problems caused by this drug are presently lacking.
View Article and Find Full Text PDFDysregulated immune responses are essential underlying causes of a plethora of pathologies including cancer, autoimmunity, and immunodeficiency. We here investigated 4 patients from unrelated families presenting with immunodeficiency, autoimmunity, and malignancy. We identified 4 distinct homozygous mutations in TNFRSF9 encoding the tumor necrosis factor receptor superfamily member CD137/4-1BB, leading to reduced, or loss of, protein expression.
View Article and Find Full Text PDFBackground: Everolimus is a mammalian target of rapamycin inhibitor used in the treatment of multiple tumor types, and its most common toxicity, stomatitis, can affect patient quality of life. Recent studies in breast cancer have supported the efficacy of steroid mouthwash for the prevention of everolimus-associated stomatitis. However, a few studies have been reported to date, and none have examined this effect in other tumor types.
View Article and Find Full Text PDFRNA works as a genome and messenger in RNA viruses, and it sends messages in most of the creatures of the Earth, including viruses, bacteria, fungi, plants, and animals. The human innate immune system has evolved to detect single- and double-stranded RNA molecules from microbes by pattern recognition receptors and induce defense reactions against infections such as the production of type I interferons and inflammatory cytokines. To avoid cytokine toxicity causing chronic inflammation or autoimmunity by sensing self-RNA, the activation of RNA sensors is strictly regulated.
View Article and Find Full Text PDFPreviously no mouse gastric cancer cell lines have been available for transplantation into C57BL/6 mice. However, a gastric cancer model in immunocompetent mice would be useful for analyzing putative therapies. N-Methyl-N-nitrosourea (MNU) was given in drinking water to C57BL/6 mice and p53 heterozygous knockout mice.
View Article and Find Full Text PDFJ Pharm Health Care Sci
February 2018
Background: Most eye disorders are not fatal but may deteriorate the quality of life of a patient. The eye disorder that is most frequently reported in the cancer chemotherapy is associated with the combination of tegafur/gimeracil/potassium oxonate (S-1). However, preventive methods or treatment methods for the eye disorder have not yet been established.
View Article and Find Full Text PDFPattern recognition receptors (PRRs) play a crucial role in the innate immune system and contribute to host defense against microbial infection. PRR-mediated antimicrobial signals provide robust type-I IFN/cytokine production and trigger inflammation, thereby affecting tumor progression and autoimmune diseases. Accumulating evidence demonstrates that among the PRRs, only the signaling pathway of endosomal toll-like receptor 3 (TLR3) induces no systemic inflammation and mediates cross-priming of antigen-specific CD8 T cells by dendritic cells.
View Article and Find Full Text PDFIgA nephropathy (IgAN), the most prevalent primary chronic glomerulonephritis worldwide, has three major risk factors: hypertension, proteinuria >1 g/day, and severe renal lesions. Obesity also portends a poor prognosis. A Japanese boy with IgAN showed nephrotic syndrome at presentation.
View Article and Find Full Text PDFThe clathrin-dependent endocytic pathway is crucial for endosomal TLR3- and TLR4-mediated Toll-IL-1R domain-containing adaptor molecule-1 (TICAM-1) signaling. TLR4 uses a different signaling platform, plasma membrane and endosomes, for activation of TIRAP-MyD88 and TICAM-2-TICAM-1, respectively. LPS-induced endocytosis of TLR4 is mandatory for TICAM-1-mediated signaling including IFN-β production.
View Article and Find Full Text PDFWe performed a survey of cancer patients' needs for drug treatment and support from pharmacists during treatment and evaluated the support that cancer patients can expect from community pharmacists in the future. The patients consisted of 16 members of the Cancer Patient Association in Aichi prefecture who underwent chemotherapy. The results of a semistructured group interview were qualitatively analyzed using the grounded theory method.
View Article and Find Full Text PDFCompartmentalization of nucleic acid (NA)-sensing TLR3, 7, 8, and 9 is strictly regulated to direct optimal response against microbial infection and evade recognition of host-derived NAs. Uncoordinated 93 homolog B1 (UNC93B1) is indispensable for trafficking of NA-sensing TLRs from the endoplasmic reticulum (ER) to endosomes/lysosomes. UNC93B1 controls loading of the TLRs into COPII vesicles to exit from the ER and traffics with the TLRs in the steady state.
View Article and Find Full Text PDFTLR4 triggers LPS signaling through the adaptors Toll/IL-1R domain-containing adaptor molecule (TICAM)-2 (also called TRAM) and TICAM-1 (also called TRIF), together with Toll/IL-1R domain-containing adaptor protein (TIRAP) and MyD88. The MyD88 pathway mediates early phase responses to LPS on the plasma membrane, whereas the TICAM pathway mediates late-phase responses, which induce the production of type I IFN and activation of inflammasomes. TICAM-2 bridges TLR4 and TICAM-1 for LPS signaling in the endosome.
View Article and Find Full Text PDFImmune-enhancing adjuvants usually targets antigen (Ag)-presenting cells to tune up cellular and humoral immunity. CD141(+) dendritic cells (DC) represent the professional Ag-presenting cells in humans. In response to microbial pattern molecules, these DCs upgrade the maturation stage sufficient to improve cross-presentation of exogenous Ag, and upregulation of MHC and costimulators, allowing CD4/CD8 T cells to proliferate and liberating cytokines/chemokines that support lymphocyte attraction and survival.
View Article and Find Full Text PDFBackground: Spices have been used for thousands of years, and recent studies suggest that certain spices confer beneficial effects on gastric disorders. The purpose of this study was to evaluate possible chemopreventive effects of spice-derived compounds on Helicobacter pylori (H. pylori)-induced gastritis.
View Article and Find Full Text PDFStudy Design: Retrospective cross-sectional study.
Purpose: To determine the prevalence of idiopathic scoliosis, define the distribution of the curve magnitude, evaluate the accuracy of Moiré topography as a screening tool, and investigate the cost-effectiveness of our screening system.
Overview Of Literature: Early detection of idiopathic scoliosis provides the opportunity for conservative treatment before the deformity is noticeable.
Ligand stimulation of the Toll-like receptors (TLRs) triggers innate immune response, cytokine production and cellular immune activation in dendritic cells. However, most TLR ligands are microbial constituents, which cause inflammation and toxicity. Toxic response could be reduced for secure immunotherapy through the use of chemically synthesized ligands with defined functions.
View Article and Find Full Text PDFChemoprevention strategies against gastric cancer (GC) need to be explored in light of the fact that stomach cancer still occurs in the absence of Helicobacter pylori (HP) infection and following HP eradication. We evaluated the effect of rebamipide on N-methyl-N'-nitro-N-nitrosoguanidine (MNNG)-induced carcinogenesis in SD rats. Thirty-nine male rats were divided into four groups based on whether or not they were treated with rebamipide and/or MNNG: Control, Rebamipide, Control-M, and Rebamipide-M groups.
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