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CD8+T cell exhaustion is a state of T cell dysfunction during chronic infection and tumor progression. Exhausted CD8+T cells are characterized by low effector function, high expression of inhibitory receptors, unique metabolic patterns, and altered transcriptional profiles. Recently, advances in understanding and interfering with the regulatory mechanisms associated with T cell exhaustion in tumor immunotherapy have brought greater attention to the field. Therefore, we emphasize the typical features and related mechanisms of CD8+T cell exhaustion and particularly the potential for its reversal, which has clinical implications for immunotherapy.

Biofeedback combined with psychotherapy has been recognized as a potential treatment for patients with functional constipation, anxiety and depression disorder. To validate the therapeutic effect of the biofeedback therapy, 120 patients with a clear diagnosis of functional constipation combined with anxiety and depression disorder were recruited, and then randomly divided into the control group (patients received gastrointestinal medication and anti-anxiety and depression medication) and the treatment group (patients received combined biofeedback and psychotherapy on the basis of the control group’s treatment program). The treatment group was treated with biofeedback exercise twice a day for 7 days, supplemented with psychotherapy for a period of 2 months (half-month intervals for one time). Intestinal medications in the treatment group were stopped after one month of treatment. While for the control group, patients were maintained with gastrointestinal motivational drugs, probiotics, anti-anxiety and depression medications. Both groups reduced the dosage of anxiolytics and depressants after 3 months. The control and the treatment group were both effective and the latter had a more significant effect compared to the former. Moreover, the anxiety/depression symptom for patients in the treatment group was significantly milder than those in the control group. Notably, compared with pre-treatment symptoms, the treatment group showed a significant reduction in Pittsburgh sleep quality index (PSQI) scores in the sixth month (F = 0.008, P  = 0.008). In summary, biofeedback combined with psychotherapy may improve relieve constipation patients’ clinical symptoms, anxiety/depression state and sleep quality. The treatment is durable, safe, and easy to implement, so it is suitable for widely used.

Bronchogenic cysts originate from abnormal foregut budding during embryogenesis. Two pathogenic mechanisms exist: (1) ectopic migration of tracheobronchial precursors forming cysts in extrapulmonary sites, and (2) retained bronchial buds developing pulmonary cysts through mucus accumulation. Despite anatomical variations, all cysts retain respiratory epithelium with mucinous glands, pathognomonically reflecting their embryological origin. Herein, we report an unusual case of bronchogenic cyst in the posterior wall of the gastric fundus with elevated CEA and CA199 in cystic fluid. CT showed that a kind of circular soft tissue density shadow was visible under the submucosa of the stomach floor, with a size of about 3.9 × 3.7 cm, uniform density, and clear boundary. Pathology after surgical resection of the gastric tumor: the cystic wall‐like tissue was locally lined with ciliated columnar epithelium, the mucosa showed chronic inflammation, and foreign body giant cell reaction, calcification, and ossification were observed in the submucosa. The patient was diagnosed as having a bronchogenic cyst in the posterior wall of the gastric fundus and was followed up for 12 months after the operation, with no obvious discomfort. Bronchogenic cyst in gastric fundus.

Hantaan viruses (HTNVs) are zoonotic pathogens transmitted mainly by rodents and capable of infecting humans. Increasing knowledge of the human response to HTNV infection can guide the development of new preventative vaccines and therapeutic strategies. Here, we show that HTNV can infect CD8+ T cells in vivo in patients diagnosed with hemorrhagic fever with renal syndrome (HFRS). Electron microscopy-mediated tracking of the life cycle and ultrastructure of HTNV-infected CD8+ T cells in vitro showed an association between notable increases in cytoplasmic multivesicular bodies and virus production. Notably, based on a clinical cohort of 280 patients, we found that circulating HTNV-infected CD8+ T cell numbers in blood were proportional to disease severity. These results demonstrate that viral infected CD8+ T cells may be used as an adjunct marker for monitoring HFRS disease progression and that modulating T cell functions may be explored for new treatment strategies.Rongrong Liu et al. find that Hantaan virus, a common cause of hemorrhagic fever with renal syndrome (HFRS) in China, can infect CD8+ T cells and that these cells can support the full viral replication cycle. They also see an association between CD8+ T cells infection and disease progression in HFRS patients.

Lymphocyte-specific protein tyrosine kinase (LCK) is common in a variety of hematologic malignancies but comparatively less common in solid tumors. This study aimed to explore the potential diagnostic and prognostic value of LCK across tumors through integrative and comprehensive pan-cancer analysis, as well as experimental validation. Multiple databases were used to explore the expression, alteration, prognostic value, association with immune infiltration, and potential functional pathways of LCK in pan-cancers. The results were further validated by western blotting and qPCR of patient samples as well as tumor cell lines. High LCK expression typically represents a better prognosis. Notably, drug sensitivity prediction of LCK identified P-529 as a candidate for drug development. Gene Annotations (GO) and KEGG analyses showed significant enrichment of PD-L1 and the T-cell receptor pathway. The results from patient samples and tumor cell lines confirmed these conclusions in LIHC. In conclusion, LCK is differentially expressed in multiple tumors and normal tissues. Further analysis highlighted its association with prognostic implications, pan-cancer genetic alterations, and immune signatures. Our data provide evidence for a diagnostic marker of LCK and the possible use of LCK as a target for the treatment of tumors.

SMAD-specific E3 ubiquitin protein ligase 2 (SMURF2) functions as either a tumor promoter or tumor suppressor in several tumors. However, the detailed effect of SMURF2 on non-small cell lung cancer has not been fully understood. In this study, SMURF2 expression and its diagnostic value were analyzed. Co-Immunoprecipitation (Co-IP), proximity ligation assay (PLA), chromatin immunoprecipitation (ChIP) and nude mice tumor-bearing model were applied to further clarify the role of SMURF2 in lung cancer. SMURF2 expression was reduced in the tumor tissues of patients with NSCLC and high SMURF2 expression was significantly correlated with favorable outcomes. Furthermore, the overexpression of SMURF2 significantly inhibited lung cancer cell progression. Mechanistically, SMURF2 interacted with inhibitor of DNA binding 2 (ID2), subsequently promoting the poly-ubiquitination and degradation of ID2 through the ubiquitin-proteasome pathway. Downregulated ID2 in lung cells dissociates endogenous transcription factor E2A, a positive regulator of the cyclin-dependent kinase inhibitor p21, and finally induces G1/S arrest in lung cancer cells. This study revealed that the manipulation of ID2 via SMURF2 may control tumor progression and contribute to the development of novel targeted antitumor drugs.

CD8 + T-cell exhaustion is a state of dysfunction that promotes tumor progression and is marked by the generation of Slamf6 + progenitor exhausted (Tex prog ) and Tim-3 + terminally exhausted (Tex term ) subpopulations. Inhibitor of DNA binding protein 2 (Id2) has been shown to play important roles in T-cell development and CD8 + T-cell immunity. However, the role of Id2 in CD8 + T-cell exhaustion is unclear. Here, we found that Id2 transcriptionally and epigenetically regulates the generation of Tex prog cells and their conversion to Tex term cells. Genetic deletion of Id2 dampens CD8 + T-cell-mediated immune responses and the maintenance of stem-like CD8 + T-cell subpopulations, suppresses PD-1 blockade and increases tumor susceptibility. Mechanistically, through its HLH domain, Id2 binds and disrupts the assembly of the Tcf3-Tal1 transcriptional regulatory complex, and thus modulates chromatin accessibility at the Slamf6 promoter by preventing the interaction of Tcf3 with the histone lysine demethylase LSD1. Therefore, Id2 increases the abundance of the permissive H3K4me2 mark on the Tcf3-occupied E-boxes in the Slamf6 promoter, modulates chromatin accessibility at the Slamf6 promoter and epigenetically regulates the generation of Slamf6 + Tex prog cells. An LSD1 inhibitor GSK2879552 can rescue the Id2 knockout phenotype in tumor-bearing mice. Inhibition of LSD1 increases the abundance of Slamf6 + Tim-3 − Tex prog cells in tumors and the expression level of Tcf1 in Id2-deleted CD8 + T cells. This study demonstrates that Id2-mediated transcriptional and epigenetic modification drives hierarchical CD8 + T-cell exhaustion, and the mechanistic insights gained may have implications for therapeutic intervention with tumor immune evasion.

Colorectal cancer (CRC) is a prevalent and aggressive malignancy with high mortality rates and significant risks to human well-being. Population-wide screening for tumor suppressor genes and oncogenes shows promise for reducing the incidence and fatality of CRC. Recent studies have suggested that NLRX1, an innate immunity suppressor, may play a role in regulating chronic inflammation and tumorigenesis. However, further investigation is needed to understand the specific role of NLRX1 in CRC. To evaluate the impact of NLRX1 on migration, invasion, and metastasis, two human colon cancer cell lines were studied in vitro. Additionally, a knockout mouse tumor-bearing model was used to validate the inhibitory effect of NLRX1 on tumor emergence and progression. The Seahorse XF96 technology was employed to assess mitochondrial function and glycolysis in colorectal cancer cells overexpressing NLRX1. Moreover, public databases were consulted to analyze gene and protein expression levels of NLRX1. Finally, the results were validated using a series of CRC patient samples. Our findings demonstrate that downregulation of NLRX1 enhances proliferation, colony formation, and tumor-forming capacity in HCT116 and LoVo cells. Conversely, overexpression of NLRX1 negatively impacts basal respiration and mitochondrial ATP-linked respiration in both cell lines, resulting in a notable decrease in maximal respiration during the standard mitochondrial stress test. Furthermore, analysis of data from the TCGA database reveals a significant reduction in NLRX1 expression in colon and rectal cancer tissues compared to normal tissues. This result was validated using clinical samples, where immunohistochemistry staining and western blotting demonstrated a notable reduction in NLRX1 protein levels in CRC compared to adjacent normal tissues. The decreased expression of NLRX1 may serve as a significant prognostic indicator and diagnostic biomarker for CRC patients.

Up to 50% of hepatocellular carcinoma (HCC) is caused by hepatitis B virus (HBV) infection, and the surface protein of HBV is essential for the progression of HBV-related HCC. The expression of large HBV surface antigen (LHB) is presented in HBV-associated HCC tissues and is significantly associated with the development of HCC. Gene set enrichment analysis revealed that LHB overexpression regulates the cell cycle process. Excess LHB in HCC cells induced chronic endoplasmic reticulum (ER) stress and was significantly correlated with tumor growth in vivo. Cell cycle analysis showed that cell cycle progression from G1 to S phase was greatly enhanced in vitro. We identified intensive crosstalk between ER stress and cell cycle progression in HCC. As an important regulator of the G1/S checkpoint, p27 was transcriptionally upregulated by transcription factors ATF4 and XBP1s, downstream of the unfolded protein response pathway. Moreover, LHB-induced ER stress promoted internal ribosome-entry-site-mediated selective translation of p27, and E3 ubiquitin ligase HRD1-mediated p27 ubiquitination and degradation. Ultimately, the decrease in p27 protein levels reduced G1/S arrest and promoted the progress of HCC by regulating the cell cycle.

Geological Cloud 2.0 is a comprehensive upgrade of data resources and systems on the Geological Cloud 1.0. As one of its distributed nodes, geological environment sub-node provides data sharing services in the geological environment for Geological Cloud 2.0. In order to better serve the comprehensive sharing of Geological Cloud 2.0 data resources, the specific technical implementation of Geological Cloud 2.0 geological environment sub-node data sharing was introduced with shared data. The construction effect of this node was introduced. The results show that the data sharing implementation technology of geological environment sub-node provides reference experience for Geological Cloud 2.0 construction and upgrading in the future.