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1.
ANZ J Surg ; 2024 Oct 11.
Artigo em Inglês | MEDLINE | ID: mdl-39392183

RESUMO

BACKGROUND: The use of nomograms in predicting the prognosis of early-stage non-small cell lung cancer (NSCLC), particularly in elderly patients, is not widespread. A validated prognostic model specifically for NSCLC patients over 80 years old holds promising potential for clinical application in forecasting patient outcomes. METHODS: The prognostic value of various factors for NSCLC patients aged 80 and above was evaluated using data from the Surveillance, Epidemiology, and End Results (SEER) database (2010-2017). Kaplan-Meier (KM) curves, Cox proportional hazards regression models, and nomogram were utilized to evaluate the impact of each factor on cancer-specific survival (CSS). RESULTS: A cohort comprising 7045 individuals was selected for inclusion in the analysis. Through rigorous statistical analysis, 10 independent prognostic factors were identified and incorporated into the nomogram. The nomogram's receiver operating characteristic (ROC) curve area under the curve (AUC) was higher than that of the AJCC 7th edition TNM staging system's predicted CSS (0.744 versus 0.602), establishing the superior prognostic value of the nomogram. CONCLUSIONS: We have successfully created a highly accurate and discriminative nomogram that enables oncologists to predict the survival outcome of each individual patient with I/II NSCLC who is 80 years or older.

2.
Sci Data ; 11(1): 1085, 2024 Oct 04.
Artigo em Inglês | MEDLINE | ID: mdl-39366975

RESUMO

The deep learning (DL)-based prediction of accurate lymph node (LN) clinical target volumes (CTVs) for nasopharyngeal carcinoma (NPC) radiotherapy (RT) remains challenging. One of the main reasons is the variability of contours despite standardization processes by expert guidelines in combination with scarce data sharing in the community. Therefore, we retrospectively generated a 262-subjects dataset from four centers to develop the DL models for LN CTVs delineation. This dataset included 440 computed tomography images from different scanning phases, disease stages and treatment strategies. Three clinical expert boards, each comprising two experts (totalling six experts), manually delineated six basic LN CTVs on separate cohorts as the ground truth according to LN involvement and clinical requirements. Several state-of-the-art segmentation algorithms were evaluated on this benchmark, showing promising results for LN CTV segmentation. In conclusion, this work built a multicenter LN CTV segmentation dataset, which may be the first dataset for automatic LN CTV delineation development and evaluation, serving as a benchmark for future research.


Assuntos
Linfonodos , Carcinoma Nasofaríngeo , Neoplasias Nasofaríngeas , Humanos , Carcinoma Nasofaríngeo/radioterapia , Carcinoma Nasofaríngeo/diagnóstico por imagem , Carcinoma Nasofaríngeo/patologia , Linfonodos/patologia , Linfonodos/diagnóstico por imagem , Neoplasias Nasofaríngeas/diagnóstico por imagem , Neoplasias Nasofaríngeas/radioterapia , Neoplasias Nasofaríngeas/patologia , Tomografia Computadorizada por Raios X , Estudos Retrospectivos , Aprendizado Profundo
3.
Photochem Photobiol Sci ; 23(10): 1883-1891, 2024 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-39352683

RESUMO

The disruption of lipid droplet function is associated with the pathogenesis of various diseases. Clarifying the response behavior of lipid droplets to the microenvironment at the cellular level is of great significance. Plant lipids not only exist in phospholipids in cell membranes, but also in aromatic essential oils. Monitoring the level of lipid droplets in plant cells using fluorescent probes provides a simple method for screening lipid-rich varieties. We synthesized a polarity-viscosity responsive coumarin fluorescent probe, Cou-CN, which achieved sensitive detection of polarity and viscosity in dilute solution environments by constructing this simple probe with ICT and TICT properties and verifying it using Gaussian computational simulation. Cou-CN exhibited good lipid droplet illumination effects in HepG2 cells with a correlation coefficient of 0.92 compared to the commercial lipid droplet dye BODIPY. Additionally, co-staining the probe with the lipophilic commercial dye Nile Red in tobacco root stem seedling cells resulted in a high correlation coefficient of 0.9.


Assuntos
Corantes Fluorescentes , Nicotiana , Raízes de Plantas , Corantes Fluorescentes/química , Corantes Fluorescentes/síntese química , Humanos , Nicotiana/química , Viscosidade , Células Hep G2 , Raízes de Plantas/química , Raízes de Plantas/metabolismo , Cumarínicos/química , Cumarínicos/síntese química , Gotículas Lipídicas/química , Gotículas Lipídicas/metabolismo , Imagem Óptica , Estrutura Molecular
4.
Chem Asian J ; : e202401067, 2024 Oct 31.
Artigo em Inglês | MEDLINE | ID: mdl-39481045

RESUMO

Mercury is highly toxic, and appropriate amounts of the mercury-selenium complex can protect plasma. However, when excessive mercury (II) ions (Hg2+) are exposed to human skin or ingested directly, it can lead to irreversible accumulation in the body. Therefore, detecting the presence of Hg2+ in cells is important. A novel fluorescent probe BTD-Hg-Lyso was designed and constructed based on the intramolecular charge transfer mechanism. Thiotaldehyde could specifically recognize Hg2+ so that the probe could produce a fluorescence enhancement effect. In addition, the fluorescent probe BTD-Hg-Lyso exhibited the advantages of large Stokes shift (210 nm) and good selectivity. More importantly, the probe BTD-Hg-Lyso could be used for the determination of Hg2+ in cellular lysosomes. BTD-Hg-Lyso was able to image Hg2+ in HeLa cells, zebrafish, and tobacco seedlings (rhizome and stem) successfully.

5.
Cell Death Dis ; 15(10): 779, 2024 Oct 27.
Artigo em Inglês | MEDLINE | ID: mdl-39465258

RESUMO

Excessive DNA damage triggers various types of programmed cell death (PCD), yet the regulatory mechanism of DNA damage-induced cell death is not fully understood. Here, we report that PANoptosis, a coordinated PCD pathway, including pyroptosis, apoptosis and necroptosis, is activated by DNA damage. The Z-DNA binding protein 1 (ZBP1) is the apical sensor of PANoptosis and essential for PANoptosome assembly in response to DNA damage. We find endogenous retroviruses (ERVs) are activated by DNA damage and act as ligands for ZBP1 to trigger PANoptosis. By using ZBP1 knock-out and knock-in mice disrupting ZBP1 nucleic acid-binding activity, we demonstrate that ZBP1-mediated PANoptosis contributes to the toxic effects of chemotherapeutic drugs, which is dependent on ZBP1 nucleic acid-binding activity. We found that ZBP1 expression is downregulated in tumor tissue. Furthermore, in colorectal cancer patients, dsRNA is induced by chemotherapy and sensed by ZBP1 in normal colonic tissues, suggesting ZBP1-mediated PANoptosis is activated by chemotherapy in normal tissues. Our findings indicate that ZBP1-mediated PANoptosis is activated by DNA damage and contributes to the toxic side effects of DNA-damage-based chemotherapy. These data suggest that ZBP1 could be a promising therapeutic target to alleviate chemotherapy-related side effects.


Assuntos
Dano ao DNA , Retrovirus Endógenos , Proteínas de Ligação a RNA , Animais , Proteínas de Ligação a RNA/metabolismo , Proteínas de Ligação a RNA/genética , Humanos , Camundongos , Retrovirus Endógenos/genética , Retrovirus Endógenos/metabolismo , Necroptose/efeitos dos fármacos , Necroptose/genética , Antineoplásicos/efeitos adversos , Antineoplásicos/farmacologia , Camundongos Knockout , Apoptose/efeitos dos fármacos , Piroptose/efeitos dos fármacos , Camundongos Endogâmicos C57BL , Neoplasias Colorretais/genética , Neoplasias Colorretais/tratamento farmacológico , Neoplasias Colorretais/patologia , Neoplasias Colorretais/metabolismo
7.
J Ophthalmic Inflamm Infect ; 14(1): 55, 2024 Oct 24.
Artigo em Inglês | MEDLINE | ID: mdl-39446221

RESUMO

PURPOSE: To evaluate the safety and efficacy of intravitreal dexamethasone implantation during phacoemulsification and intraocular lens implantation in pediatric uveitis. METHODS: A retrospective analysis was conducted on pediatric uveitis patients undergoing phacoemulsification and intraocular lens implantation with intravitreal dexamethasone implantation. Patients with a minimum follow-up of 6 months were included. Primary outcome measures included ocular inflammation, intraocular pressure (IOP), best-corrected visual acuity (BCVA), and worsening of uveitis. RESULTS: 36 eyes of 28 patients were ultimately included in this study. The mean preoperative BCVA was 1.00 (0.40-1.50) LogMAR. BCVA significantly improved to 0.40 (0.20-0.54) LogMAR at 1 month postoperatively (P = 0.006), further improving to 0.30 (0.20-0.40) LogMAR at 3 months postoperatively (P = 0.001). BCVA remained stable at 0.30 (0.20-0.70) LogMAR at 6 months postoperatively (P = 0.005). Mean IOP showed no statistically significant difference during the follow-up period of three to six months after surgery. Eight children experienced recurrence of ocular inflammation during the 6-month follow-up period. No cases of worsening macular edema, glaucoma, or elevated IOP were observed in any patient. CONCLUSION: Intravitreal dexamethasone implantation during phacoemulsification and intraocular lens implantation is a safe and effective method for preventing and treating postoperative inflammation in children with uveitis.

8.
J Control Release ; 375: 127-141, 2024 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-39233281

RESUMO

High Epidermal growth factor receptor (EGFR) in Cutaneous Squamous Cell Carcinoma (cSCC) is associated with poor prognosis and advanced metastatic stages, severely impeding the efficacy of EGFR-targeting immunotherapy. This is commonly attributed to the combinatory outcomes of hypoxic tumor microenvironment (TME) and immunosuppressive effector cells together. Herein, a novel paradigm of EGFR-targeting oxygen-saturated nanophotosensitizers, designated as CHPFN-O2, has been specifically tailored to mitigate tumor hypoxia in EGFR-positive cSCC and achieve Cetuximab (CTX)-mediated immunotherapy (CIT). The conjugated CTX in CHPFN-O2 serves to initiate immune responses by recruiting Fc receptor (FcR)-expressing immune effector cells towards tumor cells, thereby eliciting antibody-dependent cellular phagocytosis (ADCP), antibody-dependent cellular trogocytosis (ADCT) and antibody-dependent cellular cytotoxicity (ADCC). Besides, CHPFN-O2 can engender a shift from a tumor-friendly to a tumor-hostile one through improved tumor oxygenation, contributing to oxygen-elevated photodynamic therapy (oxPDT). Notably, the combination of oxPDT and CIT eventually promotes T-cell-mediated antitumor activity and successfully inhibits the growth of EGFR-expressing cSCC with good safety profiles. This comprehensive oxPDT/CIT integration aims not only to enhance therapeutic efficacy against EGFRhigh cSCC but also to extend its applicability to other EGFRhigh malignancies, thus delineating a new avenue for the highly efficient synergistic treatment of EGFR-expressing malignancies.


Assuntos
Cetuximab , Receptores ErbB , Imunoterapia , Oxigênio , Fotoquimioterapia , Fármacos Fotossensibilizantes , Microambiente Tumoral , Receptores ErbB/antagonistas & inibidores , Receptores ErbB/imunologia , Humanos , Animais , Fármacos Fotossensibilizantes/administração & dosagem , Fármacos Fotossensibilizantes/uso terapêutico , Oxigênio/administração & dosagem , Fotoquimioterapia/métodos , Linhagem Celular Tumoral , Microambiente Tumoral/efeitos dos fármacos , Imunoterapia/métodos , Cetuximab/administração & dosagem , Cetuximab/farmacologia , Cetuximab/uso terapêutico , Neoplasias Cutâneas/tratamento farmacológico , Neoplasias Cutâneas/imunologia , Neoplasias Cutâneas/terapia , Neoplasias Cutâneas/patologia , Carcinoma de Células Escamosas/tratamento farmacológico , Carcinoma de Células Escamosas/terapia , Carcinoma de Células Escamosas/imunologia , Antineoplásicos Imunológicos/administração & dosagem , Antineoplásicos Imunológicos/farmacologia , Camundongos Endogâmicos BALB C , Feminino , Nanopartículas/administração & dosagem , Hipóxia Tumoral/efeitos dos fármacos , Camundongos Nus , Camundongos
9.
Mol Nutr Food Res ; 68(19): e2400386, 2024 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-39246092

RESUMO

SCOPE: This research examines the effects of maternal high-fat (HF) diet and gestational diabetes mellitus (GDM) on offspring lipid metabolism and polyunsaturated fatty acids (PUFA) profile. METHODS AND RESULTS: GDM is induced using the insulin receptor antagonist S961. Weaning offspring are categorized into HF-GDM, HF-CON, NC-GDM, and NC-CON groups based on maternal diet or GDM. Adult offspring are then grouped into NC-CON-NC, NC-CON-HF, NC-GDM-NC, NC-GDM-HF, HF-CON-NC, HF-CON-HF, HF-GDM-NC, and HF-GDM-HF according to dietary patterns. Gas chromatography determines PUFA composition. Western blot assesses PI3K/Akt signaling pathway-related protein expression. Feeding a normal chow diet until adulthood improves the distribution of hepatic PUFA during weaning across the four groups. PI3K expression is upregulated during weaning in HF-CON and HF-GDM, particularly in HF-CON-NC and HF-GDM-NC, compared to NC-CON-NC during adulthood. Akt expression increases in NC-GDM-NC after weaning with a normal diet. The hepatic PUFA profile in HF-CON-HF significantly distinguishes among the maternal generation health groups. Maternal HF diet exacerbates the combined impact of maternal GDM and offspring HF diet on hepatic PUFA and PI3K/Akt signaling pathway-related proteins during adulthood. CONCLUSIONS: Early exposure to HF diets and GDM affects hepatic PUFA profiles and PI3K/Akt signaling pathway protein expression in male offspring during weaning and adulthood.


Assuntos
Diabetes Gestacional , Dieta Hiperlipídica , Ácidos Graxos Insaturados , Fígado , Camundongos Endogâmicos C57BL , Efeitos Tardios da Exposição Pré-Natal , Diabetes Gestacional/metabolismo , Gravidez , Feminino , Animais , Dieta Hiperlipídica/efeitos adversos , Fígado/metabolismo , Ácidos Graxos Insaturados/metabolismo , Masculino , Fenômenos Fisiológicos da Nutrição Materna , Desmame , Fosfatidilinositol 3-Quinases/metabolismo , Camundongos , Transdução de Sinais , Proteínas Proto-Oncogênicas c-akt/metabolismo
10.
Anal Methods ; 2024 Sep 30.
Artigo em Inglês | MEDLINE | ID: mdl-39344492

RESUMO

Lipid droplets (LDs) and lysosomes were dynamic organelles present in most eukaryotic cells that were interconnected and worked closely together to ensure the smooth physiological activities of organisms. The interaction between lipid droplets and lysosomes was thought to play a role in the development of certain diseases. In this paper we designed and synthesised a lipid droplet lysosomal probe. The Nap-Lyso-Ph-OH probe was constructed according to the ICT mechanism and exhibited sensitivity to both polarity and viscosity. The probe exhibited low cytotoxicity, a large Stokes shift, excellent selectivity and photostability. The probe was successfully used for labelling and imaging of lipid droplets and lysosomes in cells and zebrafish. Interestingly, we used tobacco seedling cells to explore the ability of Nap-Lyso-Ph-OH for imaging lipid droplet labelling in plant cells.

11.
J Chem Inf Model ; 64(19): 7503-7512, 2024 Oct 14.
Artigo em Inglês | MEDLINE | ID: mdl-39262130

RESUMO

Lipid nanobubbles with different gas cores may integrate the biocompatibility of lipids, powerful physicochemical properties of nanobubbles, and therapeutic effects of gas molecules, which thus promote enormous biomedical applications such as ultrasound molecular imaging, gene/drug delivery, and gas therapy. In order for further more precise applications, the exact molecular mechanisms for the interactions between lipid nanobubbles and biological systems should be studied. Molecular dynamics (MD) simulation provides a powerful computational tool for this purpose. However, previous state-of-the-art MD simulations of free gas nanobubble/lipid nanobubble employed the vacuum as their gas cores, which is not suitable for studying the interactions between functional lipid nanobubbles and biological systems and revealing the biological roles of gas molecules. Hence, in this work, we developed and optimized the CHARMM36 all-atom gas parameters for six gases including N2, O2, H2, CO, CO2, and SO2, which accurately reproduced the gas density at different pressures as well as the spontaneous formation of gas nanobubbles. Subsequent applications of these gas parameters for lipid nanobubble simulations also reproduced the self-assembly process of the lipid nanobubble. We further developed a Python script to generate all-atom lipid nanobubble simulation systems, which was proven to be efficient for all-atom MD simulations of lipid nanobubbles and to be able to capture the exact dynamics of gas molecules at the gas-lipid and lipid-water interfaces of the lipid nanobubble. In summary, the all-atom gas models proposed in this work are suitable for simulating free gas nanobubbles and lipid nanobubbles, which are supposed to overcome the shortcomings of previous state-of-the-art MD simulations with the vacuum replacing the gas core and play key roles in revealing the molecular-level interactions between lipid nanobubbles and biological systems.


Assuntos
Gases , Lipídeos , Simulação de Dinâmica Molecular , Gases/química , Lipídeos/química , Nanoestruturas/química
12.
Front Oncol ; 14: 1418273, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-39220644

RESUMO

Background: Catheter-related thrombosis (CRT) is a common complication for patients who receive central venous catheter (CVC) placement. This study investigated the risk factors for CRT and developed a nomogram for CRT prediction among cancer patients. Methods: This nested case-control study was conducted in the Third Affiliated Hospital of Kunming Medical University between January 2019 and February 2021. Univariable and multivariable logistic regression analyses were used to identify the risk factors for CRT. A nomogram was developed to predict CRT. Receiver operating curves (ROC), calibration curves, and decision curves were used to evaluate the performance of the nomogram in the training and validation sets. Results: A total of 4,691 cancer patients were included in this study. Among them, 355 (7.57%) had CRT, and 70% of CRTs occurred in the first week of insertion. Among the 3,284 patients in the training set, the multivariable analysis showed that nine characteristics were independently associated with CRT, and a nomogram was constructed based on the multivariable analysis. The ROC analysis indicated good discrimination in the training set (area under the curve [AUC] = 0.832, 95% CI: 0.802-0.862) and the testing set (AUC = 0.827, 95% CI: 0.783-0.871) for the CRT nomogram. The calibration curves showed good calibration abilities, and the decision curves indicated the clinical usefulness of the prediction nomograms. Conclusion: The validated nomogram accurately predicts CRT occurrence in cancer patients. This model may assist clinicians in developing treatment plans for each patient.

13.
Eur J Med Chem ; 279: 116830, 2024 Dec 05.
Artigo em Inglês | MEDLINE | ID: mdl-39303516

RESUMO

Src homology-2-containing protein tyrosine phosphatase 2 (SHP2), a critical regulator of proliferation pathways and immune checkpoint signaling in various cancers, is an attractive target for cancer therapy. Here, we report the discovery of a novel series of substituted pyridine carboxamide derivatives as potent allosteric SHP2 inhibitors. Among them, compound C6 showed excellent inhibitory activity against SHP2 and antiproliferative effect on MV-4-11 cell line with IC50 values of 0.13 and 3.5 nM, respectively. Importantly, orally administered C6 displayed robust in vivo antitumor efficacy in the MV-4-11 xenograft mouse model (TGI = 69.5 %, 30 mg/kg). Subsequent H&E and Ki67 staining showed that C6 significantly suppressed the proliferation of tumor cells. Notably, flow cytometry, ELISA and immunofluorescence experiments showed that C6 remarkably decreased the population of CD206+/Ly6C+ M2-like tumor-associated macrophages (TAMs), the expression level of interleukin-10 (IL-10), and the number of F4/80+/CD206+ M2-like TAMs, suggesting that C6 could effectively alleviate the activation and infiltration of M2-like TAMs. Taken together, these results illustrate that C6 is a promising SHP2 inhibitor worthy of further development.


Assuntos
Antineoplásicos , Proliferação de Células , Descoberta de Drogas , Proteína Tirosina Fosfatase não Receptora Tipo 11 , Piridinas , Proteína Tirosina Fosfatase não Receptora Tipo 11/antagonistas & inibidores , Proteína Tirosina Fosfatase não Receptora Tipo 11/metabolismo , Humanos , Animais , Proliferação de Células/efeitos dos fármacos , Antineoplásicos/farmacologia , Antineoplásicos/química , Antineoplásicos/síntese química , Relação Estrutura-Atividade , Camundongos , Regulação Alostérica/efeitos dos fármacos , Estrutura Molecular , Piridinas/farmacologia , Piridinas/química , Piridinas/síntese química , Ensaios de Seleção de Medicamentos Antitumorais , Relação Dose-Resposta a Droga , Inibidores Enzimáticos/farmacologia , Inibidores Enzimáticos/química , Inibidores Enzimáticos/síntese química , Linhagem Celular Tumoral , Amidas/química , Amidas/farmacologia , Amidas/síntese química , Camundongos Endogâmicos BALB C
14.
Mol Nutr Food Res ; 68(20): e2400310, 2024 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-39318069

RESUMO

SCOPE: Monomethyl-branched chain fatty acids (mmBCFAs) are found in a variety of food sources and are of great interest due to their potent antiinflammatory properties. However, most of the current researches have concentrated on the relationship between mmBCFAs and intestinal inflammation, and there is a large gap in the biological mechanisms involved behind their antiinflammatory effects. METHODS AND RESULTS: The present study examines the role of mmBCFAs in modulating macrophage polarization. The results demonstrate that iso-C16:0 significantly inhibits macrophages M1 proinflammatory polarization through regulating FABP4/PPAR-γ pathway. Proteomics and molecular biology experiments verify that metabolic reprogramming is involved in the inhibition of M1 macrophage, referring to the upregulation of fatty acid oxidation, TCA cycle, and oxidative phosphorylation, as well as downregulation of glycolytic flux. CONCLUSION: In summary, this study offers a novel perspective on the antiinflammatory effects mediated by mmBCFAs.


Assuntos
Proteínas de Ligação a Ácido Graxo , Ácidos Graxos , Macrófagos , PPAR gama , Transdução de Sinais , PPAR gama/metabolismo , Animais , Macrófagos/efeitos dos fármacos , Macrófagos/metabolismo , Transdução de Sinais/efeitos dos fármacos , Proteínas de Ligação a Ácido Graxo/metabolismo , Camundongos , Células RAW 264.7 , Ácidos Graxos/farmacologia , Ácidos Graxos/metabolismo , Anti-Inflamatórios/farmacologia
15.
Nat Commun ; 15(1): 7081, 2024 Aug 17.
Artigo em Inglês | MEDLINE | ID: mdl-39152168

RESUMO

DSS1, essential for BRCA2-RAD51 dependent homologous recombination (HR), associates with the helical domain (HD) and OB fold 1 (OB1) of the BRCA2 DSS1/DNA-binding domain (DBD) which is frequently targeted by cancer-associated pathogenic variants. Herein, we reveal robust ss/dsDNA binding abilities in HD-OB1 subdomains and find that DSS1 shuts down HD-OB1's DNA binding to enable ssDNA targeting of the BRCA2-RAD51 complex. We show that C-terminal helix mutations of DSS1, including the cancer-associated R57Q mutation, disrupt this DSS1 regulation and permit dsDNA binding of HD-OB1/BRCA2-DBD. Importantly, these DSS1 mutations impair BRCA2/RAD51 ssDNA loading and focus formation and cause decreased HR efficiency, destabilization of stalled forks and R-loop accumulation, and hypersensitize cells to DNA-damaging agents. We propose that DSS1 restrains the intrinsic dsDNA binding of BRCA2-DBD to ensure BRCA2/RAD51 targeting to ssDNA, thereby promoting optimal execution of HR, and potentially replication fork protection and R-loop suppression.


Assuntos
Proteína BRCA2 , Replicação do DNA , DNA de Cadeia Simples , DNA , Recombinação Homóloga , Mutação , Rad51 Recombinase , Proteína BRCA2/metabolismo , Proteína BRCA2/genética , Proteína BRCA2/química , Humanos , DNA/metabolismo , Rad51 Recombinase/metabolismo , Rad51 Recombinase/genética , DNA de Cadeia Simples/metabolismo , DNA de Cadeia Simples/genética , Homeostase , Ligação Proteica , Proteínas de Ligação a DNA/metabolismo , Proteínas de Ligação a DNA/genética , Domínios Proteicos , Linhagem Celular Tumoral , Dano ao DNA , Complexo de Endopeptidases do Proteassoma
16.
Nutr Diabetes ; 14(1): 59, 2024 08 03.
Artigo em Inglês | MEDLINE | ID: mdl-39097595

RESUMO

BACKGROUND: Due to the essential role of calcium in vital biological functions, diet low in calcium (DLC) is associated with various diseases. However, there is a lack of study about the current prevalence and health burden due to DLC using reliable data sources. METHODS: We used data from the Global Burden of Disease study 2019 (GBD 2019) to estimate the prevalence and health burden of DLC in 204 countries from 1990 to 2019, by age, sex, and sociodemographic index (SDI). The estimates were produced in DisMod-MR 2.1, a Bayesian meta-regression tool. Summary exposure value (SEV) was used to show the prevalence of DLC, while diseases adjusted life year (DALY) was used to represent the disease burden. The disease burden was estimated for DLC-induced colorectal cancer. Spearman Rank Order correlation was used for correlation analysis, and estimated annual percentage (EAPC) was used to reflect the temporal trends. RESULTS: From 1990 to 2019, the global prevalence of DLC decreased (EAPC of SEV, -0.47; 95% CI, -0.5 to -0.43), but have increased in Oceania region and in many countries, such as United Arab Emirates, New Zealand, Japan, and France. The global DALYs associated with low in calcium were estimated to be 3.14 million (95% uncertainty interval (UI), 2.25-4.26 million) in 2019, with an age standardized rate of 38.2 (95% UI, 27.2-51.8) per 100,000. Unlike the prevalence, the global age standardized DALY rates has remained unchanged (EAPC, -0.03; 95% CI, -0.12 to 0.07), but has increased in over 80 of the 204 countries, located mainly in Asia, Africa, and South America. In all years and regions, the age standardized SEV and DALY rates were higher in male people than that in female people. The prevalence (rho = -0.823; P < 0.001) and disease burden (rho = -0.433; P < 0.001) associated with diet in low calcium were strongly correlated to SDI. The prevalence decreased with age, but the DALY rates increased with age and peaked at about 90 years. The prevalence of DLC has decreased worldwide and in most countries, but the disease burden of DLC induced colorectal cancer has increased in over 40% of countries worldwide. CONCLUSION: Countries with low sociodemographic level and male people are more likely to experience the risk of DLC and related disease burden. Related measures in improve dietary calcium intake are in need to address diet in low calcium related health problems.


Assuntos
Cálcio da Dieta , Carga Global da Doença , Saúde Global , Humanos , Masculino , Feminino , Prevalência , Pessoa de Meia-Idade , Adulto , Idoso , Adulto Jovem , Cálcio da Dieta/administração & dosagem , Dieta , Adolescente , Criança , Pré-Escolar , Lactente , Anos de Vida Ajustados por Deficiência , Neoplasias Colorretais/epidemiologia , Idoso de 80 Anos ou mais , Efeitos Psicossociais da Doença , Teorema de Bayes
17.
Acta Pharmacol Sin ; 2024 Aug 28.
Artigo em Inglês | MEDLINE | ID: mdl-39198663

RESUMO

The transcription factor STAT3 is a promising target for the treatment of non-small cell lung cancer (NSCLC). STAT3 activity is mainly dependent on phosphorylation at tyrosine 705 (pSTAT3-Y705), but the modulation on pSTAT3-Y705 is elusive. By screening a library of deubiquitinases (Dubs), we found that the Otub1 increases STAT3 transcriptional activity. As a Dub, Otub1 binds to pSTAT3-Y705 and specifically abolishes its K48-linked ubiquitination, therefore preventing its degradation and promoting NSCLC cell survival. The Otub1/pSTAT3-Y705 axis could be a potential target for the treatment of NSCLC. To explore this concept, we screen libraries of FDA-approved drugs and natural products based on STAT3-recognition element-driven luciferase assay, from which crizotinib is found to block pSTAT3-Y705 deubiquitination and promotes its degradation. Different from its known action to induce ALK positive NSCLC cell apoptosis, crizotinib suppresses ALK-intact NSCLC cell proliferation and colony formation but not apoptosis. Furthermore, crizotinib also suppresses NSCLC xenograft growth in mice. Taken together, these findings identify Otub1 as the first deubiquitinase of pSTAT3-Y705 and provide that the Otub1/pSTAT3-Y705 axis is a promising target for the treatment of NSCLC.

18.
Stem Cells ; 42(10): 889-901, 2024 Oct 09.
Artigo em Inglês | MEDLINE | ID: mdl-38995653

RESUMO

Efficient homing of infused hematopoietic stem and progenitor cells (HSPCs) into the bone marrow (BM) is the prerequisite for successful hematopoietic stem cell transplantation. However, only a small part of infused HSPCs find their way to the BM niche. A better understanding of the mechanisms that facilitate HSPC homing will help to develop strategies to improve the initial HSPC engraftment and subsequent hematopoietic regeneration. Here, we show that irradiation upregulates the endomucin expression of endothelial cells in vivo and in vitro. Furthermore, depletion of endomucin in irradiated endothelial cells with short-interfering RNA (siRNA) increases the HSPC-endothelial cell adhesion in vitro. To abrogate the endomucin of BM sinusoidal endothelial cells (BM-SECs) in vivo, we develop a siRNA-loaded bovine serum albumin nanoparticle for targeted delivery. Nanoparticle-mediated siRNA delivery successfully silences endomucin expression in BM-SECs and improves HSPC homing during transplantation. These results reveal that endomucin plays a critical role in HSPC homing during transplantation and that gene-based manipulation of BM-SEC endomucin in vivo can be exploited to improve the efficacy of HSPC transplantation.


Assuntos
Transplante de Células-Tronco Hematopoéticas , Células-Tronco Hematopoéticas , RNA Interferente Pequeno , Animais , Células-Tronco Hematopoéticas/metabolismo , Transplante de Células-Tronco Hematopoéticas/métodos , Camundongos , RNA Interferente Pequeno/administração & dosagem , RNA Interferente Pequeno/metabolismo , Inativação Gênica , Medula Óssea/metabolismo , Camundongos Endogâmicos C57BL , Células Endoteliais/metabolismo , Movimento Celular , Adesão Celular , Células da Medula Óssea/metabolismo , Células da Medula Óssea/citologia
19.
Phytomedicine ; 132: 155838, 2024 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-38964153

RESUMO

BACKGROUND: Areca nut polyphenols (AP) that extracted from areca nut, have been demonstrated for their potential of anti-fatigue effects. However, the underlying mechanisms for the anti-fatigue properties of AP has not been fully elucidated to date. Previous studies have predominantly concentrated on single aspects, such as antioxidation and anti-inflammation, yet have lacked comprehensive multi-dimensional analyses. PURPOSE: To explore the underlying mechanism of AP in exerting anti-fatigue effects. METHODS: In this study, we developed a chronic sleep deprivation-induced fatigue model and used physiological, hematological, and biochemical indicators to evaluate the anti- fatigue efficacy of AP. Additionally, a multi-omics approach was employed to reveal the anti-fatigue mechanisms of AP from the perspective of microbiome, metabolome, and proteome. RESULTS: The detection of physiology, hematology and biochemistry index indicated that AP markedly alleviate mice fatigue state induced by sleep deprivation. The 16S rRNA sequencing showed the AP promoted the abundance of probiotics (Odoribacter, Dubosiella, Marvinbryantia, and Eubacterium) and suppressed harmful bacteria (Ruminococcus). On the other hand, AP was found to regulate the expression of colonic proteins, such as increases of adenosine triphosphate (ATP) synthesis and mitochondrial function related proteins, including ATP5A1, ATP5O, ATP5L, ATP5H, NDUFA, NDUFB, NDUFS, and NDUFV. Serum metabolomic analysis revealed AP upregulated the levels of anti-fatigue amino acids, such as taurine, leucine, arginine, glutamine, lysine, and l-proline. Hepatic proteins express levels, especially tricarboxylic acid (TCA) cycle (CS, SDHB, MDH2, and DLST) and redox-related proteins (SOD1, SOD2, GPX4, and PRDX3), were significantly recovered by AP administration. Spearman correlation analysis uncovered the strong correlation between microbiome, metabolome and proteome, suggesting the anti-fatigue effects of AP is attribute to the energy homeostasis and redox balance through gut-liver axis. CONCLUSION: AP increased colonic ATP production and improve mitochondrial function by regulating gut microbiota, and further upregulated anti-fatigue amino acid levels in the blood. Based on the gut-liver axis, AP upregulated the hepatic tricarboxylic acid cycle and oxidoreductase-related protein expression, regulating energy homeostasis and redox balance, and ultimately exerting anti-fatigue effects. This study provides insights into the anti-fatigue mechanisms of AP, highlighting its potential as a therapeutic agent.


Assuntos
Areca , Fadiga , Polifenóis , Animais , Camundongos , Areca/química , Modelos Animais de Doenças , Fadiga/tratamento farmacológico , Fadiga/etiologia , Microbioma Gastrointestinal/efeitos dos fármacos , Multiômica , Nozes/química , Extratos Vegetais/farmacologia , Extratos Vegetais/química , Polifenóis/farmacologia , Privação do Sono/complicações , Privação do Sono/tratamento farmacológico
20.
Int J Mol Med ; 54(3)2024 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-38963054

RESUMO

PANoptosis, a complex form of proinflammatory programmed cell death, including apoptosis, pyroptosis and necroptosis, has been an emerging concept in recent years that has been widely reported in cancer, infectious diseases and neurological disorders. Cardiovascular diseases (CVDs) are an important global health problem, posing a serious threat to individuals' lives. An increasing body of research shows that inflammation has a pivotal role in CVDs, which provides an important theoretical basis for PANoptosis to promote the progression of CVDs. To date, only sporadic studies on PANoptosis in CVDs have been reported and its role in the field of CVDs has not been fully explored. Elucidating the various modes of cardiomyocyte death, the specific molecular mechanisms and the links among the various modes of death under various stressful stimuli is of notable clinical significance for a deeper understanding of the pathophysiology of CVDs. The present review summarizes the molecular mechanisms of apoptosis, pyroptosis, necroptosis and PANoptosis and their prospects in the field of CVDs.


Assuntos
Doenças Cardiovasculares , Necroptose , Piroptose , Humanos , Doenças Cardiovasculares/patologia , Doenças Cardiovasculares/metabolismo , Animais , Apoptose/fisiologia , Morte Celular Regulada , Inflamação/patologia , Miócitos Cardíacos/patologia , Miócitos Cardíacos/metabolismo
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