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1.
Metabolism ; 155: 155909, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38582490

RESUMO

BACKGROUND: Krüppel-like factor 10 (KLF10), a zinc finger transcription factor, plays a pivotal role in modulating TGF-ß-mediated cellular processes such as growth, apoptosis, and differentiation. Recent studies have implicated KLF10 in regulating lipid metabolism and glucose homeostasis. This study aimed to elucidate the precise role of hepatic KLF10 in developing metabolic dysfunction-associated steatohepatitis (MASH) in diet-induced obese mice. METHODS: We investigated hepatic KLF10 expression under metabolic stress and the effects of overexpression or ablation of hepatic KLF10 on MASH development and lipidemia. We also determined whether hepatocyte nuclear factor 4α (HNF4α) mediated the metabolic effects of KLF10. RESULTS: Hepatic KLF10 was downregulated in MASH patients and genetically or diet-induced obese mice. AAV8-mediated overexpression of KLF10 in hepatocytes prevented Western diet-induced hypercholesterolemia and steatohepatitis, whereas inactivation of hepatocyte KLF10 aggravated Western diet-induced steatohepatitis. Mechanistically, KLF10 reduced hepatic triglyceride and free fatty acid levels by inducing lipolysis and fatty acid oxidation and inhibiting lipogenesis, and reducing hepatic cholesterol levels by promoting bile acid synthesis. KLF10 highly induced HNF4α expression by directly binding to its promoter. The beneficial effect of KLF10 on MASH development was abolished in mice lacking hepatocyte HNF4α. In addition, the inactivation of KLF10 in hepatic stellate cells exacerbated Western diet-induced liver fibrosis by activating the TGF-ß/SMAD2/3 pathway. CONCLUSIONS: Our data collectively suggest that the transcription factor KLF10 plays a hepatoprotective role in MASH development by inducing HNF4α. Targeting hepatic KLF10 may offer a promising strategy for treating MASH.


Assuntos
Fatores de Transcrição de Resposta de Crescimento Precoce , Fígado Gorduroso , Fator 4 Nuclear de Hepatócito , Fatores de Transcrição Kruppel-Like , Animais , Fator 4 Nuclear de Hepatócito/metabolismo , Fator 4 Nuclear de Hepatócito/genética , Fatores de Transcrição Kruppel-Like/metabolismo , Fatores de Transcrição Kruppel-Like/genética , Camundongos , Humanos , Masculino , Fatores de Transcrição de Resposta de Crescimento Precoce/metabolismo , Fatores de Transcrição de Resposta de Crescimento Precoce/genética , Fígado Gorduroso/metabolismo , Fígado Gorduroso/etiologia , Camundongos Endogâmicos C57BL , Metabolismo dos Lipídeos , Fígado/metabolismo , Hepatócitos/metabolismo , Camundongos Knockout
2.
Heliyon ; 10(5): e27322, 2024 Mar 15.
Artigo em Inglês | MEDLINE | ID: mdl-38463802

RESUMO

Sorafenib resistance is one of the main causes of poor prognosis in patients with advanced hepatocellular carcinoma (HCC). Long noncoding RNAs (lncRNAs) function as suppressors or oncogenic factors during tumor progression and drug resistance. Here, to identify therapeutic targets for HCC, the biological mechanisms of abnormally expressed lncRNAs were examined in sorafenib-resistant HCC cells. Specifically, we established sorafenib-resistant HCC cell lines (Huh7-S and SMMC7721-S), which displayed an epithelial-mesenchymal transition (EMT) phenotype. Transcriptome sequencing (RNA-Seq) was performed to established differential lncRNA expression profiles for sorafenib-resistant cells. Through this analysis, we identified LINC00540 as significantly up-regulated in sorafenib-resistant cells and a candidate lncRNA for further mechanistic investigation. Functionally, LINC00540 knockdown promoted sorafenib sensitivity and suppressed migration, invasion, EMT and the activation of PI3K/AKT signaling pathway in sorafenib-resistant HCC cells, whereas overexpression of LINC00540 resulted in the opposite effects in parental cells. LINC00540 functions as a competing endogenous RNA (ceRNA) by competitively binding to miR-4677-3p , thereby promoting AKR1C2 expression. This is the first study that demonstrates a role for LINC00540 in enhancing sorafenib resistance, migration and invasion of HCC cells through the LINC00540/miR-4677-3p/AKR1C2 axis, suggesting that LINC00540 may represent a potential therapeutic target and prognosis biomarker for HCC.

3.
J Lipid Res ; 65(4): 100527, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38447926

RESUMO

Forkhead transcription factor 3 (FOXA3) has been shown to regulate metabolism and development. Hepatic FOXA3 is reduced in obesity and fatty liver disease. However, the role of hepatic FOXA3 in regulating obesity or steatohepatitis remains to be investigated. In this work, C57BL/6 mice were i.v. injected with AAV8-ALB-FOXA3 or the control virus. The mice were then fed a chow or Western diet for 16 weeks. The role of hepatic FOXA3 in energy metabolism and steatohepatitis was investigated. Plasma bile acid composition and the role of Takeda G protein-coupled receptor 5 (TGR5) in mediating the metabolic effects of FOXA3 were determined. Overexpression of hepatic FOXA3 reduced hepatic steatosis in chow-fed mice and attenuated Western diet-induced obesity and steatohepatitis. FOXA3 induced lipolysis and inhibited hepatic genes involved in bile acid uptake, resulting in elevated plasma bile acids. The beneficial effects of hepatic FOXA3 overexpression on Western diet-induced obesity and steatohepatitis were abolished in Tgr5-/- mice. Our data demonstrate that overexpression of hepatic FOXA3 prevents Western diet-induced obesity and steatohepatitis via activation of TGR5.


Assuntos
Dieta Ocidental , Fator 3-gama Nuclear de Hepatócito , Fígado , Camundongos Endogâmicos C57BL , Obesidade , Receptores Acoplados a Proteínas G , Animais , Receptores Acoplados a Proteínas G/metabolismo , Receptores Acoplados a Proteínas G/genética , Obesidade/metabolismo , Obesidade/genética , Obesidade/etiologia , Camundongos , Fator 3-gama Nuclear de Hepatócito/metabolismo , Fator 3-gama Nuclear de Hepatócito/genética , Fígado/metabolismo , Dieta Ocidental/efeitos adversos , Masculino , Fígado Gorduroso/metabolismo , Fígado Gorduroso/genética , Fígado Gorduroso/etiologia , Ácidos e Sais Biliares/metabolismo
4.
J Mater Chem B ; 12(10): 2628-2638, 2024 Mar 06.
Artigo em Inglês | MEDLINE | ID: mdl-38376513

RESUMO

Magnetic nanomaterial-mediated magnetic hyperthermia is a localized heating treatment modality that has been applied to treat aggressive cancer in clinics. In addition to being taken up by tumor cells to function in cancer therapy, magnetic nanomaterials can also be internalized by immune cells in the tumor microenvironment, which may contribute to regulating the anti-tumor immune effects. However, there exists little studies on the distribution of magnetic nanomaterials in different types of cells within tumor tissue. Herein, ferrimagnetic vortex-domain iron oxide nanorings (FVIOs) with or without the liver-cancer-targeting peptide SP94 have been successfully synthesized as a model system to investigate the effect of surface modification of FVIOs (with or without SP94) on the distribution of tumor cells and different immune cells in hepatocellular carcinoma (HCC) microenvironment of a mouse. The distribution ratio of FVIO-SP94s in tumor cells was 1.3 times more than that of FVIOs. Immune cells in the liver tumor microenvironment took up fewer FVIO-SP94s than FVIOs. In addition, myeloid cells were found to be much more amenable than lymphoid cells in terms of their ability to phagocytose nanoparticles. Specifically, the distributions of FVIOs/FVIO-SP94s in tumor-associated macrophages, dendritic cells, and myeloid-derived suppressor cells were 13.8%/12%, 3.7%/0.9%, and 6.3%/1.2%, respectively. While the distributions of FVIOs/FVIO-SP94s in T cells, B cells, and natural killer cells were 5.5%/0.7%, 3.0%/0.7%, and 0.4%/0.3%, respectively. The results described in this article enhance our understanding of the distribution of nanomaterials in the tumor microenvironment and provide a strategy for rational design of magnetic hyperthermia agents that can effectively regulate anti-tumor immune effects.


Assuntos
Carcinoma Hepatocelular , Hipertermia Induzida , Neoplasias Hepáticas , Camundongos , Animais , Carcinoma Hepatocelular/terapia , Carcinoma Hepatocelular/patologia , Neoplasias Hepáticas/terapia , Neoplasias Hepáticas/patologia , Hipertermia Induzida/métodos , Magnetismo , Fenômenos Magnéticos , Microambiente Tumoral
5.
Medicina (Kaunas) ; 60(1)2024 Jan 09.
Artigo em Inglês | MEDLINE | ID: mdl-38256380

RESUMO

Background and Objectives: Type 1 diabetes mellitus (T1DM) is a chronic and serious condition that is characterized by inadequate pancreatic-ß-cells' insulin production. The connection between T1DM and Helicobacter pylori infection remains uncertain. This study aimed to conduct a systematic meta-analysis to examine the association between H. pylori infection, hemoglobin A1c levels, and the development of T1DM. Materials and Methods: The initial search identified 451 articles on the association between H. pylori infection and T1DM. Among them, 12 articles had 2797 participants who met the inclusion criteria for an advanced meta-analysis. Results: A significant association was observed between H. pylori infection and T1DM (OR 1.77, 95% CI 1.47-2.12, p < 0.0001), with heterogeneity: Tau2 = 0.47; Chi2 = 57.07, df = 11 (p < 0.0001); I2 = 81%. Subgroup analysis showed that H. pylori infection was significantly associated with a longer duration of T1DM and higher hemoglobin A1c levels (p < 0.001 for both) but not with age at T1DM diagnosis (p = 0.306). Conclusions: These findings contribute to the understanding of the association between H. pylori infection and T1DM and highlight the potential role of H. pylori in influencing the duration and glycemic control of diabetes. Therefore, pediatric patients who have longstanding T1DM and poor glycemic control should be screened for H. pylori infection.


Assuntos
Diabetes Mellitus Tipo 1 , Infecções por Helicobacter , Helicobacter pylori , Humanos , Criança , Lactente , Diabetes Mellitus Tipo 1/complicações , Infecções por Helicobacter/complicações , Hemoglobinas Glicadas , Controle Glicêmico
6.
Bioresour Technol ; 395: 130365, 2024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-38266784

RESUMO

Regulatory complexities in lipogenesis hinder the harmonization of metabolic carbon precursors towards lipid synthesis. Exploring regulatory complexities in lipogenesis, this study identifies NADP+-dependent isocitrate dehydrogenase (IDH) in Tetradesmus obliquus as a key factor. Overexpression IDH in strains ToIDH-1 and ToIDH-2 resulted in a 1.69 and 1.64-fold increase in neutral lipids, respectively, compared to the wild type, with lipid yield reaching 234.56 and 227.17 mg/L. Notably, despite slower growth, the cellular biomass augmented to 790.67 mg/L. Metabolite analysis indicated a shift in carbon precursors from protein to lipid and carbohydrate synthesis. Morphological observations revealed increases in the volume and number of lipid droplets, alongside a change in the fatty acid profile favoring monounsaturated and saturated fatty acids. Furthermore, IDH overexpression enhanced NADPH production and antioxidant activity, thereby further boosting lipid accumulation when combined with salt stress. This study suggests a pathway for improved lipogenesis and algal growth via metabolic engineering.


Assuntos
Antioxidantes , Isocitrato Desidrogenase , Isocitrato Desidrogenase/genética , Isocitrato Desidrogenase/metabolismo , NADP/metabolismo , NADPH Desidrogenase , Ácidos Graxos , Carbono
7.
Biomed Pharmacother ; 170: 115954, 2024 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-38039753

RESUMO

The potential of Ferrimagnetic vortex iron oxide nanoring-mediated mild magnetic hyperthermia (FVIO-MHT) in solid tumor therapy has been demonstrated. However, the impact of FVIO-MHT on the tumor microenvironment (TME) remains unclear. This study utilized single-cell transcriptome sequencing to examine the alterations in the TME in response to FVIO-MHT in breast cancer. The results revealed the cellular composition within the tumor microenvironment (TME) was primarily modified due to a decrease in tumor cells and an increased infiltration of myeloid cells. Subsequently, an enhancement in active oxygen (ROS) metabolism was observed, indicating oxidative damage to tumor cells. Interestingly, FVIO-MHT reprogrammed the macrophages' phenotypes, as evidenced by alterations in the transcriptome characteristics associated with both classic and alternative activated phenotypes. And an elevated level of ROS generation and oxidative phosphorylation suggested that activated phagocytosis and inflammation occurred in macrophages. Additionally, cell-cell communication analysis revealed that FVIO-MHT attenuated the suppression between tumor cells and macrophages by inhibiting phagocytic checkpoint and macrophage migration inhibitory factor signaling pathways. Inhibition of B2m, an anti-phagocytosis checkpoint, could promote macrophage-mediated phagocytosis and significantly inhibit tumor growth. These data emphasize FVIO-MHT may promote the antitumor capabilities of macrophages by alleviating the suppression between tumor cells and macrophages.


Assuntos
Neoplasias da Mama , Hipertermia Induzida , Humanos , Feminino , Neoplasias da Mama/genética , Neoplasias da Mama/terapia , Espécies Reativas de Oxigênio/farmacologia , Macrófagos , Fenômenos Magnéticos , Perfilação da Expressão Gênica , Microambiente Tumoral
8.
Obesity (Silver Spring) ; 32(1): 120-130, 2024 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-37873741

RESUMO

OBJECTIVE: The adipose tissue-liver axis is a major regulator of the pathogenesis of nonalcoholic fatty liver disease (NAFLD). Retinoic acid signaling plays an important role in development and metabolism. However, little is known about the role of adipose retinoic acid signaling in the development of obesity-associated NAFLD. In this work, the aim was to investigate whether and how retinoic acid receptor alpha (RARα) regulated the development of obesity and NAFLD. METHODS: RARα expression in adipose tissue of db/db or ob/ob mice was determined. Rarαfl/fl mice and adipocyte-specific Rarα-/- (RarαAdi-/- ) mice were fed a chow diet for 1 year or high-fat diet (HFD) for 20 weeks. Primary adipocytes and primary hepatocytes were co-cultured. Metabolic regulation and inflammatory response were characterized. RESULTS: RARα expression was reduced in adipose tissue of db/db or ob/ob mice. RarαAdi-/- mice had increased obesity and steatohepatitis (NASH) when fed a chow diet or HFD. Loss of adipocyte RARα induced lipogenesis and inflammation in adipose tissue and the liver and reduced thermogenesis. In the co-culture studies, loss of RARα in adipocytes induced inflammatory and lipogenic programs in hepatocytes. CONCLUSIONS: The data demonstrate that RARα in adipocytes prevents obesity and NASH via inhibiting lipogenesis and inflammation and inducing energy expenditure.


Assuntos
Hepatopatia Gordurosa não Alcoólica , Animais , Camundongos , Adipócitos/metabolismo , Dieta Hiperlipídica/efeitos adversos , Metabolismo Energético , Inflamação/metabolismo , Lipogênese/genética , Fígado/metabolismo , Camundongos Endogâmicos C57BL , Hepatopatia Gordurosa não Alcoólica/etiologia , Hepatopatia Gordurosa não Alcoólica/prevenção & controle , Hepatopatia Gordurosa não Alcoólica/metabolismo , Obesidade/complicações , Receptor alfa de Ácido Retinoico/genética , Receptor alfa de Ácido Retinoico/metabolismo , Tretinoína/metabolismo
9.
RSC Adv ; 13(47): 33288-33293, 2023 Nov 07.
Artigo em Inglês | MEDLINE | ID: mdl-37964906

RESUMO

We developed an automated Raman measurement platform for the customized design of various solution containers. We used the software LabVIEW to integrate the entire automatic measurement process. By designing an intuitive human-machine interface, the user only needs to input a few setting parameters and can efficiently operate the machine in automation mode for an array of solutions containing real or counterfeit liquors such as kaoliang liquor, vodka, rum, gin, rice wine, ethanol, and methanol. In this study, data from various alcoholic beverage solutions were subjected to principal component analysis (PCA) to distinguish from the low-concentration counterfeit liquors (methanol <50 g L-1). Moreover, several brands of liquors with the same alcohol concentration were successfully classified into different groups based on a combination of Raman spectroscopy and PCA analysis.

10.
Dev Cell ; 58(21): 2326-2337.e5, 2023 11 06.
Artigo em Inglês | MEDLINE | ID: mdl-37863040

RESUMO

High-density lipoprotein (HDL) metabolism is regulated by complex interplay between the scavenger receptor group B type 1 (SR-BI) and multiple signaling molecules in the liver. Here, we show that lipocalin-2 (Lcn2) is a key regulator of hepatic SR-BI, HDL metabolism, and atherosclerosis. Overexpression of human Lcn2 in hepatocytes attenuates the development of atherosclerosis via SR-BI in western-diet-fed Ldlr-/- mice, whereas hepatocyte-specific ablation of Lcn2 has the opposite effect. Mechanistically, hepatocyte Lcn2 improves HDL metabolism and alleviates atherogenesis by blocking Nedd4-1-mediated SR-BI ubiquitination at K500 and K508. The Lcn2-improved HDL metabolism is abolished in mice with hepatocyte-specific Nedd4-1 or SR-BI deletion and in SR-BI (K500A/K508A) mutation mice. This study identifies a regulatory axis from Lcn2 to HDL via blocking Nedd4-1-mediated SR-BI ubiquitination and demonstrates that hepatocyte Lcn2 may be a promising target to improve HDL metabolism to treat atherosclerotic cardiovascular diseases.


Assuntos
Aterosclerose , Lipoproteínas HDL , Camundongos , Humanos , Animais , Lipoproteínas HDL/metabolismo , Lipocalina-2/genética , Lipocalina-2/metabolismo , Hepatócitos/metabolismo , Aterosclerose/genética , Aterosclerose/metabolismo , Fígado/metabolismo , Antígenos CD36/metabolismo
11.
Cells ; 12(15)2023 08 05.
Artigo em Inglês | MEDLINE | ID: mdl-37566087

RESUMO

Histone deacetylase Sirtuin 6 (SIRT6) regulates many biological processes. SIRT6 is known to regulate hepatic lipid metabolism and inhibit the development of nonalcoholic fatty liver disease (NAFLD). We aimed to investigate the role of hepatocyte SIRT6 in the development of atherosclerosis and further characterize the mechanism underlying SIRT6's effect on NAFLD. Ldlr-/- mice overexpressing or lacking hepatocyte SIRT6 were fed a Western diet for 16 weeks. The role of hepatic SIRT6 in the development of nonalcoholic steatohepatitis (NASH), atherosclerosis, and obesity was investigated. We also investigated whether p53 participates in the pathogenesis of NAFLD in mice overexpressing hepatic SIRT6. Our data show that loss of hepatocyte SIRT6 aggravated the development of NAFLD, atherosclerosis, and obesity in Ldlr-/- mice, whereas adeno-associated virus (AAV)-mediated overexpression of human SIRT6 in the liver had opposite effects. Mechanistically, hepatocyte SIRT6 likely inhibited the development of NAFLD by inhibiting lipogenesis, lipid droplet formation, and p53 signaling. Hepatocyte SIRT6 also likely inhibited the development of atherosclerosis by inhibiting intestinal lipid absorption and hepatic VLDL secretion. Hepatic SIRT6 also increased energy expenditure. In conclusion, our data indicate that hepatocyte SIRT6 protects against atherosclerosis, NAFLD, and obesity by regulating lipid metabolism in the liver and intestine.


Assuntos
Aterosclerose , Hepatopatia Gordurosa não Alcoólica , Sirtuínas , Humanos , Animais , Camundongos , Hepatopatia Gordurosa não Alcoólica/metabolismo , Proteína Supressora de Tumor p53/genética , Proteína Supressora de Tumor p53/metabolismo , Hepatócitos/metabolismo , Obesidade/complicações , Sirtuínas/genética , Sirtuínas/metabolismo , Lipídeos , Homeostase , Aterosclerose/metabolismo
12.
J Mol Cell Biol ; 14(10)2023 03 29.
Artigo em Inglês | MEDLINE | ID: mdl-36472556

RESUMO

Lipids and glucose exert many essential physiological functions, such as providing raw materials or energy for cellular biosynthesis, regulating cell signal transduction, and maintaining a constant body temperature. Dysregulation of lipid and glucose metabolism can lead to glucolipid metabolic disorders linked to various metabolic diseases, such as obesity, diabetes, and cardiovascular disease. Therefore, intervention in glucolipid metabolism is a key therapeutic strategy for the treatment of metabolic diseases. Activating transcription factor 3 (ATF3) is a transcription factor that acts as a hub of the cellular adaptive-response network and plays a pivotal role in the regulation of inflammation, apoptosis, DNA repair, and oncogenesis. Emerging evidence has illustrated the vital roles of ATF3 in glucolipid metabolism. ATF3 inhibits intestinal lipid absorption, enhances hepatic triglyceride hydrolysis and fatty acid oxidation, promotes macrophage reverse cholesterol transport, and attenuates the progression of western diet-induced nonalcoholic fatty liver disease and atherosclerosis. In addition to its role in lipid metabolism, ATF3 has also been identified as an important regulator of glucose metabolism. Here, we summarize the recent advances in the understanding of ATF3, mainly focusing on its role in glucose and lipid metabolism and potential therapeutic implications.


Assuntos
Fator 3 Ativador da Transcrição , Doenças Metabólicas , Humanos , Fator 3 Ativador da Transcrição/genética , Fator 3 Ativador da Transcrição/metabolismo , Fígado/metabolismo , Doenças Metabólicas/metabolismo , Glucose/metabolismo , Metabolismo dos Lipídeos , Lipídeos
13.
Cell Biol Toxicol ; 39(3): 657-678, 2023 06.
Artigo em Inglês | MEDLINE | ID: mdl-34189720

RESUMO

Dexamethasone is a commonly used synthetic glucocorticoid in the clinic. As a compound that can cross the placental barrier to promote fetal lung maturation, dexamethasone is extensively used in pregnant women at risk of premature delivery. However, the use of glucocorticoids during pregnancy increases the risk of neurodevelopmental disorders. In the present study, we observed anxiety- and depressive-like behavior changes and hyperexcitability of hippocampal neurons in adult rat offspring with previous prenatal dexamethasone exposure (PDE); the observed changes were related to in utero damage of parvalbumin interneurons. A programmed change in neuregulin 1 (NRG1)-Erb-b2 receptor tyrosine kinase 4 (ErbB4) signaling was the key to the damage of parvalbumin interneurons in the hippocampus of PDE offspring. Anxiety- and depressive-like behavior, NRG1-ErbB4 signaling activation, and damage of parvalbumin interneurons in PDE offspring were aggravated after chronic stress. The intervention of NRG1-ErbB4 signaling contributed to the improvement in dexamethasone-mediated injury to parvalbumin interneurons. These results suggested that PDE might cause anxiety- and depressive-like behavior changes in male rat offspring through the programmed activation of NRG1-ErbB4 signaling, resulting in damage to parvalbumin interneurons and hyperactivity of the hippocampus. Intrauterine programming of neuregulin 1 (NRG1)-Erb-b2 receptor tyrosine kinase 4 (ERBB4) overactivation by dexamethasone mediates anxiety- and depressive-like behavior in male rat offspring.


Assuntos
Neuregulina-1 , Receptor ErbB-2 , Gravidez , Ratos , Feminino , Masculino , Humanos , Animais , Neuregulina-1/metabolismo , Parvalbuminas/metabolismo , Placenta/metabolismo , Interneurônios/metabolismo , Receptor ErbB-4/metabolismo , Ansiedade/induzido quimicamente , Hipocampo/metabolismo , Dexametasona/efeitos adversos
14.
Cells ; 11(20)2022 10 11.
Artigo em Inglês | MEDLINE | ID: mdl-36291054

RESUMO

Retinoic acid signaling plays an important role in regulating lipid metabolism and inflammation. However, the role of retinoic acid receptor alpha (RARα) in atherosclerosis remains to be determined. In the current study, we investigated the role of macrophage RARα in the development of atherosclerosis. Macrophages isolated from myeloid-specific Rarα-/- (RarαMac-/-) mice showed increased lipid accumulation and inflammation and reduced cholesterol efflux compared to Rarαfl/fl (control) mice. All-trans retinoic acid (AtRA) induced ATP-binding cassette subfamily A member 1 (Abca1) and Abcg1 expression and cholesterol efflux in both RarαMac-/- mice and Rarαfl/fl mice. In Ldlr-/- mice, myeloid ablation of RARα significantly reduced macrophage Abca1 and Abcg1 expression and cholesterol efflux, induced inflammatory genes, and aggravated Western diet-induced atherosclerosis. Our data demonstrate that macrophage RARα protects against atherosclerosis, likely via inducing cholesterol efflux and inhibiting inflammation.


Assuntos
Aterosclerose , Colesterol , Dieta Ocidental , Macrófagos , Receptor alfa de Ácido Retinoico , Animais , Camundongos , Aterosclerose/etiologia , Aterosclerose/genética , Aterosclerose/metabolismo , Colesterol/metabolismo , Inflamação/genética , Macrófagos/metabolismo , Receptor alfa de Ácido Retinoico/genética , Receptor alfa de Ácido Retinoico/metabolismo , Tretinoína/farmacologia , Tretinoína/metabolismo , Dieta Ocidental/efeitos adversos , Transportador 1 de Cassete de Ligação de ATP/genética , Transportador 1 de Cassete de Ligação de ATP/metabolismo , Membro 1 da Subfamília G de Transportadores de Cassetes de Ligação de ATP/genética , Membro 1 da Subfamília G de Transportadores de Cassetes de Ligação de ATP/metabolismo , Camundongos Knockout
15.
Hepatol Commun ; 6(10): 2665-2675, 2022 10.
Artigo em Inglês | MEDLINE | ID: mdl-35852305

RESUMO

All-trans retinoic acid (AtRA) is an active metabolite of vitamin A that influences many biological processes in development, differentiation, and metabolism. AtRA functions through activation of retinoid acid receptors (RARs). AtRA is shown to ameliorate hepatic steatosis, but the underlying mechanism is not well understood. In this study, we investigated the role of hepatocyte RAR alpha (RARα) in mediating the effect of AtRA on hepatosteatosis in mice. Hepatocyte-specific Rarα-/- (L-Rarα-/- ) mice and their control mice were fed a chow diet, high-fat diet (HFD), or a high-fat/cholesterol/fructose (HFCF) diet. Some of the mice were also treated with AtRA. Loss of hepatocyte RARα-induced hepatosteatosis in chow-fed aged mice and HFD-fed mice. AtRA prevented and reversed HFCF diet-induced obesity and hepatosteatosis in the control mice but not in L-Rarα-/- mice. Furthermore, AtRA reduced hepatocyte fatty acid uptake and lipid droplet formation, dependent on hepatocyte RARα. Our data suggest that hepatocyte RARα plays an important role in preventing hepatosteatosis and mediates AtRA's effects on diet-induced hepatosteatosis.


Assuntos
Receptores do Ácido Retinoico , Vitamina A , Animais , Dieta , Ácidos Graxos , Frutose , Camundongos , Receptores do Ácido Retinoico/genética , Receptor alfa de Ácido Retinoico/genética , Tretinoína/farmacologia
16.
BMC Pediatr ; 22(1): 96, 2022 02 17.
Artigo em Inglês | MEDLINE | ID: mdl-35177027

RESUMO

BACKGROUND: Accidental swallowing of a foreign body occurs more frequently in children than in adults. Among these cases, button battery impaction in the esophagus may cause severe complications. While prevention is always ideal, if button battery impaction is suspected, immediate diagnosis and retrieval are important. CASE PRESENTATION: We introduce a novel method for retrieval of a button battery after ingestion by a 2.5-year-old child. When the patient arrived at our center, the battery was incarcerated in the upper esophagus. The battery could not be removed, despite the use of several methods such as alligator forceps under endoscopy and net retrieval. We decided to use a novel method that combined endoscopic balloon extraction and forceps retrieval. This resulted in a push-and-pull effect, creating synergy and easy removal of the battery. There were no long term complications based on the follow-up endoscopy examination. CONCLUSIONS: This new procedure was very effective for removing the esophageal foreign body. When button battery in esophagus was too tight to be removed by the traditional retrieval methods, this procedure was suggested to use. It could be performed at medical institutions. If it fails or esophageal perforation (iatrogenic or spontaneous) occurs, pediatric surgeons could take over immediately.


Assuntos
Esôfago , Corpos Estranhos , Adulto , Pré-Escolar , Ingestão de Alimentos , Fontes de Energia Elétrica/efeitos adversos , Esôfago/diagnóstico por imagem , Corpos Estranhos/complicações , Corpos Estranhos/diagnóstico por imagem , Corpos Estranhos/cirurgia , Humanos , Estudos Retrospectivos
17.
Cell Biol Toxicol ; 38(1): 69-86, 2022 02.
Artigo em Inglês | MEDLINE | ID: mdl-33619658

RESUMO

Depression is a neuropsychiatric disorder and has intrauterine developmental origins. This study aimed to confirm the depression susceptibility in offspring rats induced by prenatal dexamethasone exposure (PDE) and to further explore the intrauterine programming mechanism. Wistar rats were injected with dexamethasone (0.2 mg/kg·d) subcutaneously during the gestational days 9-20 and part of the offspring was given chronic stress at postnatal weeks 10-12. Behavioral results showed that the adult PDE female offspring was susceptible to depression, accompanied by increased hippocampal miR-134-5p expression and decreased sex-determining region Y-box 2 (SOX2) expression, as well as disorders of neural progenitor cells proliferation and hippocampal neurogenesis. The PDE female fetal rats presented consistent changes with the adult offspring, accompanied by the upregulation of glucocorticoid receptor (GR) expression and decreased sirtuin 1 (SIRT1) expression. We further found that the H3K9ac level of the miR-134-5p promoter was significantly increased in the PDE fetal hippocampus, as well as in adult offspring before and after chronic stress. In vitro, the changes of GR/SIRT1/miR-134-5p/SOX2 signal by dexamethasone were consistent with in vivo experiments, which could be reversed by GR receptor antagonist, SIRT1 agonist, and miR-134-5p inhibitor. This study confirmed that PDE led to an increased expression level as well as H3K9ac level of miR-134-5p by activating the GR/SIRT1 pathway in the fetal hippocampus and then inhibited the SOX2 expression. The programming effect mediated by the abnormal epigenetic modification could last from intrauterine to adulthood, which constitutes the intrauterine programming mechanism leading to hippocampal neurogenesis disorders and depression susceptibility in female offspring. Intrauterine programming mechanism for the increased depressive susceptibility in adult female offspring by prenatal dexamethasone exposure (PDE). GR, glucocorticoid receptor; SIRT1, sirtuin 1; SOX2, sex-determining region Y-box 2; NPCs, neuroprogenitor cells; H3K9ac, histone 3 lysine 9 acetylation; GRE, glucocorticoid response element.


Assuntos
MicroRNAs , Efeitos Tardios da Exposição Pré-Natal , Adulto , Animais , Depressão/induzido quimicamente , Dexametasona/efeitos adversos , Feminino , Hipocampo/metabolismo , Humanos , MicroRNAs/genética , Gravidez , Efeitos Tardios da Exposição Pré-Natal/induzido quimicamente , Efeitos Tardios da Exposição Pré-Natal/metabolismo , Ratos , Ratos Wistar , Receptores de Glucocorticoides/metabolismo , Fatores de Transcrição SOXB1/genética , Fatores de Transcrição SOXB1/metabolismo , Sirtuína 1/genética , Sirtuína 1/metabolismo
18.
Medicina (Kaunas) ; 57(12)2021 Nov 23.
Artigo em Inglês | MEDLINE | ID: mdl-34946231

RESUMO

Background and Objectives: Drug-induced esophageal ulcer is caused by focal drug stimulation. It may occur in adults and children. Limited research is available in pediatric patients with drug-induced esophageal ulcer; therefore, we designed this study to determine the characteristics of this disease in this population. Materials and Methods: Thirty-two pediatric patients diagnosed with drug-induced esophageal ulcers from a hospital database of upper gastrointestinal tract endoscopies were included. After treatment, patients were followed for 2 months after upper gastrointestinal endoscopy. Results: Female patients were predominant (56.2%/43.8%). The mean age of patients was 15.6 years (median, 16 years; interquartile range, 2 years). Doxycycline was administered in most cases (56.3%); other drugs were dicloxacillin, amoxicillin, clindamycin, L-arginine, and nonsteroidal anti-inflammatory drugs. Doxycycline was associated with kissing ulcers. Esophageal ulcers induced by nonsteroidal anti-inflammatory drugs were more often associated with gastric or duodenal ulcers. The most common location was the middle-third of the esophagus (78.1%). Patients were treated with proton pump inhibitors, sucralfate, or H2-blockers. The mean duration for which symptoms lasted was 9.2 days. No esophageal stricture was found in 24 patients who were followed for 2 months after upper gastrointestinal endoscopy. Conclusions: The authors suggest informing patients to take medicine with enough water (approximately 100 mL) and enough time (15-30 min) before recumbency, especially high-risk drugs, such as doxycycline or nonsteroidal anti-inflammatory drugs.


Assuntos
Anti-Inflamatórios não Esteroides , Doxiciclina/efeitos adversos , Úlcera Péptica , Adolescente , Anti-Inflamatórios não Esteroides/efeitos adversos , Criança , Feminino , Hospitais , Humanos , Masculino , Úlcera Péptica/induzido quimicamente , Úlcera Péptica/tratamento farmacológico , Úlcera Péptica/epidemiologia , Taiwan/epidemiologia
19.
World J Clin Cases ; 9(31): 9386-9394, 2021 Nov 06.
Artigo em Inglês | MEDLINE | ID: mdl-34877274

RESUMO

BACKGROUND: The main treatment methods for cancer include surgery, radiotherapy, chemotherapy, targeted drug therapy and so on. Patients often feel anger, anxiety, depression, and other negative psychological reactions in the process of treatment. AIM: To explore the effects of cognitive behavioral therapy on the personality characteristics of cancer patients. METHODS: According to the matching design requirements, 150 cancer patients were divided into 3 groups based on sex, age, condition, and cultural background. Patients in the control group received conventional treatment. Patients in experimental group 1 received an intervention based on conventional treatment combined with cognitive behavioral therapy. Patients in experimental group 2 received family members' participation in addition to the treatment given in experimental group 1. An Eysenck personality questionnaire was used to investigate all the patients before and after the intervention, and the scores for psychosis, introversion, neuroticism, and concealment degree were analyzed. RESULTS: Compared with the control group, for experimental group 1 and experimental group 2 before and after the intervention, the four dimensions of mental quality, neuroticism, introversion and concealment degree all decreased, and the difference was statistically significant (P < 0.05). After the intervention, there were no obvious or statistically significant differences (P > 0.05) among the control group, experimental group 1, and experimental group 2 for two personality traits, psychoticism and neuroticism, both inside and outside degree and all four dimensions. CONCLUSION: Simple cognitive behavioral therapy could not change the personality characteristics of cancer patients quickly, but the patients' personality characteristics were significantly improved after treatment.

20.
Medicina (Kaunas) ; 57(10)2021 Sep 28.
Artigo em Inglês | MEDLINE | ID: mdl-34684069

RESUMO

Background: Neonatal intrahepatic cholestasis caused by citrin deficiency (NICCD) is a rare autosomal recessive disease. The incidence of citrin deficiency is estimated between 1/10,000 and 1/20,000 in Taiwan. Case report: This report describes a case of a 42 day old female infant who suffered from prolonged jaundice, poor weight gain, and anemia. The initial total/direct bilirubin levels were 8.1/3.11 mg/dL. Liver biopsy was performed at 47 days old. The pathology revealed lobules marked with macrovesicular and microvesicular fatty metamorphosis. The serum amino acid profile showed elevated levels of threonine, methionine, citrulline, and arginine. Newborn screening disclosed normal results, but the genetic study revealed SLC25A13 mutation 851-854 del and 615 + 5G > A. The genetic study of her parents showed that the father carried the SLC25A13 mutation 851-854 del and the mother carried the SLC25A13 mutation 615 + 5G > A. Treatment with ursodeoxycholic acid decreased the bilirubin levels to a normal range at the age of 5 months. Conclusion: This report illustrates that hepatic steatosis is a feature of NICCD. For every young infant patient who develops cholestasis, the pediatrician must consider NICCD as a differential diagnosis even if newborn screening shows normal findings.


Assuntos
Colestase , Icterícia , Proteínas de Ligação ao Cálcio/genética , Citrulinemia , Feminino , Humanos , Lactente , Recém-Nascido , Proteínas de Transporte da Membrana Mitocondrial/genética , Mutação
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