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2.
Clin Nutr ; 43(7): 1675-1682, 2024 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-38815493

RESUMO

OBJECTIVE: This study aimed to investigate the potential association between dietary live microbe intake and sarcopenia. METHODS: Data from 5368 participants were gathered from the National Health and Nutrition Examination Survey (NHANES). Dietary information was assessed using a self-report questionnaire. The participants were categorized into low, medium, and high dietary live microbe groups. Sarcopenia was defined according to the National Institutes of Health (NIH) definition (appendicular skeletal muscle mass/body mass index <0.789 for men and <0.512 for women). Multivariate regression analysis and stratified analyses were performed. RESULTS: After adjusting for potential confounding factors, individuals in the high dietary live microbe group exhibited a lower prevalence of sarcopenia compared to those in the low dietary live microbe group. The adjusted odds ratio (with 95% confidence intervals) was 0.63 (0.44-0.89) (p for trend <0.05). Subgroup analyses indicated a potential difference in the impact of dietary live microbe intake on sarcopenia between individuals with and without diabetes (p for interaction = 0.094). CONCLUSION: Higher dietary live microbe intake was associated with a lower risk of sarcopenia.


Assuntos
Dieta , Inquéritos Nutricionais , Sarcopenia , Humanos , Sarcopenia/epidemiologia , Sarcopenia/prevenção & controle , Masculino , Feminino , Pessoa de Meia-Idade , Dieta/métodos , Dieta/estatística & dados numéricos , Idoso , Estudos Transversais , Fatores de Risco , Prevalência , Adulto , Índice de Massa Corporal
3.
Int Immunopharmacol ; 133: 112102, 2024 May 30.
Artigo em Inglês | MEDLINE | ID: mdl-38652971

RESUMO

Anaplastic thyroid carcinoma (ATC) is the most aggressive subtype of thyroid cancer with few effective therapies. Though immunotherapies such as targeting PD-1/PD-L1 axis have benefited patients with solid tumor, the druggable immune checkpoints are quite limited in ATC. In our study, we focused on the anti-tumor potential of sialic acid-binding Ig-like lectins (Siglecs) in ATC. Through screening by integrating microarray datasets including 216 thyroid-cancer tissues and single-cell RNA-sequencing, SIGLEC family members CD33, SIGLEC1, SIGLEC10 and SIGLEC15 were significantly overexpressed in ATC, among which SIGLEC15 increased highest and mainly expressed on cancer cells. SIGLEC15high ATC cells are characterized by high expression of serine protease PRSS23 and cancer stem cell marker CD44. Compared with SIGLEC15low cancer cells, SIGLEC15high ATC cells exhibited higher interaction frequency with tumor microenvironment cells. Further study showed that SIGLEC15high cancer cells mainly interacted with T cells by immunosuppressive signals such as MIF-TNFRSF14 and CXCL12-CXCR4. Notably, treatment of anti-SIGLEC15 antibody profoundly increased the cytotoxic ability of CD8+ T cells in a co-culture model and zebrafish-derived ATC xenografts. Consistently, administration of anti-SIGLEC15 antibody significantly inhibited tumor growth and prolonged mouse survival in an immunocompetent model of murine ATC, which was associated with increase of M1/M2, natural killer (NK) cells and CD8+ T cells, and decrease of myeloid-derived suppressor cells (MDSCs). SIGLEC15 inhibited T cell activation by reducing NFAT1, NFAT2, and NF-κB signals. Blocking SIGLEC15 increased the secretion of IFN-γ and IL-2 in vitro and in vivo. In conclusion, our finding demonstrates that SIGLEC15 is an emerging and promising target for immunotherapy in ATC.


Assuntos
Imunoterapia , Proteínas de Membrana , Carcinoma Anaplásico da Tireoide , Neoplasias da Glândula Tireoide , Animais , Humanos , Camundongos , Antineoplásicos Imunológicos/farmacologia , Antineoplásicos Imunológicos/uso terapêutico , Linfócitos T CD8-Positivos/imunologia , Linhagem Celular Tumoral , Imunoglobulinas , Imunoterapia/métodos , Lectinas/genética , Lectinas/metabolismo , Carcinoma Anaplásico da Tireoide/terapia , Carcinoma Anaplásico da Tireoide/imunologia , Carcinoma Anaplásico da Tireoide/genética , Neoplasias da Glândula Tireoide/terapia , Neoplasias da Glândula Tireoide/imunologia , Neoplasias da Glândula Tireoide/genética , Microambiente Tumoral/imunologia , Ensaios Antitumorais Modelo de Xenoenxerto
4.
iScience ; 27(1): 108680, 2024 Jan 19.
Artigo em Inglês | MEDLINE | ID: mdl-38226164

RESUMO

Circular RNAs (circRNAs) are crucial regulators of ß-cell function and are involved in lipotoxicity-induced ß-cell damage in type 2 diabetes mellitus (T2DM). We previously identified that circGlis3, a circRNA derived from exon 4 of the diabetes susceptibility gene Glis3, was upregulated in lipotoxic ß cells. However, the functional role and molecular mechanism of circGlis3 in ß cells remain largely unknown. Here, we revealed that the splicing factor CUGBP Elav-Like Family Member 1 (CELF1) facilitated the biogenesis of circGlis3. Moreover, we established a transgenic mouse model and confirmed that the overexpression of circGlis3 impaired ß-cell function. Mechanistically, circGlis3 bound to heterogeneous nuclear ribonucleoprotein F (hnRNPF) and blocked its nuclear translocation, thereby reducing Sirt1 levels. Additionally, circGlis3 encoded a 348aa protein that interacted with GLIS3 and inhibited its transcriptional activity. Our data uncover a critical role of circGlis3 in ß-cell dysfunction, suggesting that circGlis3 may be a potential therapeutic target for T2DM.

5.
Cancer Lett ; 580: 216496, 2024 01 01.
Artigo em Inglês | MEDLINE | ID: mdl-37993084

RESUMO

Anaplastic thyroid cancer (ATC) is one of the deadliest cancers, whose important malignant feature is dedifferentiation. Chromatin remodeling is critical for tumorigenesis and progression, while its roles and regulator in facilitating dedifferentiation of ATC had been poorly understood. In our study, an emerging function of hematological and neurological expressed 1 (HN1) in promoting dedifferentiation of ATC cells was uncovered. HN1 expression was negatively correlated with the thyroid differentiation markers both at mRNA and protein level. Knockdown of HN1 in ATC cells effectively upregulated the thyroid differentiation markers and impeded the sphere formation capacity, accompanying with the loss of cancer stemness. In contrast, overexpression of HN1 drove the gain of stemness and the loss of thyroid differentiation markers. Nude mouse and zebrafish xenograft models showed that inhibition of HN1 in ATC cells effectively hindered tumor growth due to the loss of cancer stemness. Further study showed that HN1 was negatively correlated with CTCF in an independent thyroid-cancer cohort, and inhibition of HN1 enhanced the expression of CTCF in ATC cells. Overexpression of CTCF significantly reversed the dedifferentiation phenotypes of ATC cells, whereas simultaneously inhibiting HN1 and CTCF was unable to recover the level of thyroid differentiation markers. The combination of ATAC-seq and ChIP-seq analysis confirmed that CTCF regulated genes relating with thyroid gland development through influencing their chromatin accessibility. HN1 inhibited the acetylation of H3K27 at the promoter of CTCF by recruiting HDAC2, thereby inhibiting the transcriptional activation of CTCF. These findings demonstrated an essential role of HN1 in regulating the chromatin accessibility of thyroid differentiation genes during ATC dedifferentiation.


Assuntos
Carcinoma Anaplásico da Tireoide , Neoplasias da Glândula Tireoide , Animais , Humanos , Camundongos , Antígenos de Diferenciação , Linhagem Celular Tumoral , Cromatina , Epigênese Genética , Carcinoma Anaplásico da Tireoide/metabolismo , Neoplasias da Glândula Tireoide/patologia , Peixe-Zebra/genética
6.
Braz. J. Pharm. Sci. (Online) ; 58: e20151, 2022. tab, graf
Artigo em Inglês | LILACS | ID: biblio-1403754

RESUMO

Abstract This was a forthcoming study of those patients, who undergo in-vitro fertilization (IVF) and freeze-all embryo, who acquiesce for the study. The number of participated patients (n=350) in this study, underwent for IVF. The blood sample was collected from patients to evaluate the level of serum progesterone in vacuum vials on the day of ovulation trigger. After 36 hrs of ovulation trigger, ovum picked up was done. Quantitative methods were used to estimate the level of serum progesterone through the electrochemiluminescence immunoassay and correlation of serum progesterone with embryo transfer (ET) outcomes. Main outcome of this current study was to evaluate the value of mean serum progesterone level i.e.0.868± 0.712 ng/ml and 0.88±0.723 ng/ml was found in case of pregnancy positive and negative respectively, at p=0.216 value. In antagonist (n=40) and agonist (n=310) cases, it was 8(20%) and 37(11.94%) PL occurrence was noted at p=0.143 respectively. An overall value of the premature lutenization (PL) occurrences was 13.63% and 15.25% observed in both positive and negative cases of pregnancy at p=0.216 respectively. This study concluded that 12.66% of PL occurrences were recorded in the case of IVF. Study results proved, there were no significant effect of PL on pregnancy outcomes.


Assuntos
Humanos , Feminino , Adulto , Progesterona/agonistas , Endométrio , Histologia/classificação , Métodos , Ovulação/genética , Óvulo , Pacientes/classificação , Imunoensaio , Fertilização in vitro/classificação , Transferência Embrionária/instrumentação , Estruturas Embrionárias
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