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1.
Immunity ; 52(1): 96-108.e9, 2020 01 14.
Artigo em Inglês | MEDLINE | ID: mdl-31810881

RESUMO

Although type 1 innate lymphoid cells (ILC1s) have been originally found as liver-resident ILCs, their pathophysiological role in the liver remains poorly investigated. Here, we demonstrated that carbon tetrachloride (CCl4) injection into mice activated ILC1s, but not natural killer (NK) cells, in the liver. Activated ILC1s produced interferon-γ (IFN-γ) and protected mice from CCl4-induced acute liver injury. IFN-γ released from activated ILC1s promoted the survival of hepatocytes through upregulation of Bcl-xL. An activating NK receptor, DNAM-1, was required for the optimal activation and IFN-γ production of liver ILC1s. Extracellular adenosine triphosphate accelerated interleukin-12-driven IFN-γ production by liver ILC1s. These findings suggest that ILC1s are critical for tissue protection during acute liver injury.


Assuntos
Doença Hepática Induzida por Substâncias e Drogas/prevenção & controle , Hepatócitos/metabolismo , Interferon gama/imunologia , Fígado/citologia , Linfócitos/imunologia , Proteína bcl-X/metabolismo , Trifosfato de Adenosina/metabolismo , Animais , Antígenos de Diferenciação de Linfócitos T/genética , Antígenos de Diferenciação de Linfócitos T/metabolismo , Tetracloreto de Carbono/toxicidade , Células Cultivadas , Feminino , Subunidade p35 da Interleucina-12/imunologia , Células Matadoras Naturais/imunologia , Fígado/imunologia , Fígado/lesões , Ativação Linfocitária/imunologia , Camundongos , Camundongos Endogâmicos C57BL , Camundongos Knockout
2.
Immunity ; 46(2): 205-219, 2017 02 21.
Artigo em Inglês | MEDLINE | ID: mdl-28190711

RESUMO

Adaptive cellular immunity is initiated by antigen-specific interactions between T lymphocytes and dendritic cells (DCs). Plasmacytoid DCs (pDCs) support antiviral immunity by linking innate and adaptive immune responses. Here we examined pDC spatiotemporal dynamics during viral infection to uncover when, where, and how they exert their functions. We found that pDCs accumulated at sites of CD8+ T cell antigen-driven activation in a CCR5-dependent fashion. Furthermore, activated CD8+ T cells orchestrated the local recruitment of lymph node-resident XCR1 chemokine receptor-expressing DCs via secretion of the XCL1 chemokine. Functionally, this CD8+ T cell-mediated reorganization of the local DC network allowed for the interaction and cooperation of pDCs and XCR1+ DCs, thereby optimizing XCR1+ DC maturation and cross-presentation. These data support a model in which CD8+ T cells upon activation create their own optimal priming microenvironment by recruiting additional DC subsets to the site of initial antigen recognition.


Assuntos
Linfócitos T CD8-Positivos/imunologia , Quimiotaxia de Leucócito/imunologia , Apresentação Cruzada/imunologia , Células Dendríticas/imunologia , Animais , Ensaio de Imunoadsorção Enzimática , Citometria de Fluxo , Imunofluorescência , Camundongos , Camundongos Transgênicos
3.
J Pathol ; 263(4-5): 482-495, 2024 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-38872438

RESUMO

Liver fibrosis is the consequence of chronic liver injury in the presence of an inflammatory component. Although the main executors of this activation are known, the mechanisms that lead to the inflammatory process that mediates the production of pro-fibrotic factors are not well characterized. Epidermal growth factor receptor (EGFR) signaling in hepatocytes is essential for the regenerative processes of the liver; however, its potential role in regulating the fibrotic niche is not yet clear. Our group generated a mouse model that expresses an inactive truncated form of the EGFR specifically in hepatocytes (ΔEGFR mice). Here, we have analyzed the response of WT and ΔEGFR mice to chronic treatment with carbon tetrachloride (CCl4), which induces a pro-inflammatory and fibrotic process in the liver. The results indicated that the hallmarks of liver fibrosis were attenuated in CCl4-treated ΔEGFR mice when compared with CCl4-treated WT mice, coinciding with a faster resolution of the fibrotic process and ameliorated damage. The absence of EGFR activity in hepatocytes induced changes in the pattern of immune cells in the liver, with a notable increase in the population of M2 macrophages, more related to fibrosis resolution, as well as in the population of lymphocytes related to eradication of the damage. Transcriptome analysis of hepatocytes, and secretome studies of extracellular media from in vitro experiments, allowed us to elucidate the specific molecular mechanisms regulated by EGFR that mediate hepatocyte production of both pro-fibrotic and pro-inflammatory mediators; these have consequences for the deposition of extracellular matrix proteins, as well as for the immune microenvironment. Overall, our study uncovered novel mechanistic insights regarding EGFR kinase-dependent actions in hepatocytes that reveal its key role in chronic liver damage. © 2024 The Authors. The Journal of Pathology published by John Wiley & Sons Ltd on behalf of The Pathological Society of Great Britain and Ireland.


Assuntos
Tetracloreto de Carbono , Receptores ErbB , Hepatócitos , Transdução de Sinais , Animais , Receptores ErbB/metabolismo , Hepatócitos/metabolismo , Hepatócitos/patologia , Fígado/patologia , Fígado/metabolismo , Cirrose Hepática/metabolismo , Cirrose Hepática/patologia , Camundongos , Camundongos Endogâmicos C57BL , Masculino , Comunicação Celular , Macrófagos/metabolismo , Macrófagos/patologia , Camundongos Transgênicos
4.
Angiogenesis ; 27(3): 475-499, 2024 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-38739303

RESUMO

Aging is a natural process associated with chronic inflammation in the development of vascular dysfunction. We hypothesized that chemokine C-C motif ligands 4 (CCL4) might play a vital role in aging-related vascular dysfunction. Circulating CCL4 was up-regulated in elderly subjects and in aged animals. CCL4 inhibition reduced generation of reactive oxygen species (ROS), attenuated inflammation, and restored cell functions in endothelial progenitor cells from elderly subjects and in aged human aortic endothelial cells. CCL4 promoted cell aging, with impaired cell functioning, by activating ROS production and inflammation. CCL4 knockout mice and therapeutic administration of anti-CCL4 neutralizing antibodies exhibited vascular and dermal anti-aging effects, with improved wound healing, via the down-regulation of inflammatory proteins and the activation of angiogenic proteins. Altogether, our findings suggested that CCL4 may contribute to aging-related vascular dysfunction via activating oxidative stress and endothelial inflammation. CCL4 may be a potential therapeutic target for vascular protections during aging.


Assuntos
Envelhecimento , Quimiocina CCL4 , Inflamação , Camundongos Knockout , Estresse Oxidativo , Espécies Reativas de Oxigênio , Humanos , Animais , Envelhecimento/metabolismo , Envelhecimento/patologia , Inflamação/patologia , Inflamação/metabolismo , Quimiocina CCL4/metabolismo , Camundongos , Espécies Reativas de Oxigênio/metabolismo , Masculino , Idoso , Camundongos Endogâmicos C57BL , Células Endoteliais/metabolismo , Células Endoteliais/patologia , Feminino , Neovascularização Fisiológica , Pessoa de Meia-Idade
5.
Toxicol Appl Pharmacol ; 489: 117017, 2024 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-38925513

RESUMO

Liver fibrosis, a progressive process of fibrous scarring, results from the accumulation of extracellular matrix proteins (ECM). If left untreated, it often progresses to diseases such as cirrhosis and hepatocellular carcinoma. Lycorine, a natural alkaloid derived from medicinal plants, has shown diverse bioactivities by targeting JAK2/STAT3 signaling, but its pharmacological effects and potential molecular mechanisms in liver fibrosis remains largely unexplored. The purpose of this study is to elucidate the pharmacological activity and molecular mechanism of lycorine in anti-hepatic fibrosis. Findings indicate that lycorine significantly inhibited hepatic stellate cells (HSCs) activation by reducing the expression of α-SMA and collagen-1. In vivo, lycorine treatment alleviated carbon tetrachloride (CCl4) -induced mice liver fibrosis, improving liver function, decreasing ECM deposition, and inhibiting fibrosis-related markers' expression. Mechanistically, it was found that lycorine exerts protective activity through the JAK2/STAT3 and PI3K/AKT signaling pathways, as evidenced by transcriptome sequencing technology and small molecule inhibitors. These results underscore lycorine's potential as a therapeutic drug for liver fibrosis.


Assuntos
Alcaloides de Amaryllidaceae , Tetracloreto de Carbono , Células Estreladas do Fígado , Janus Quinase 2 , Cirrose Hepática , Fenantridinas , Proteínas Proto-Oncogênicas c-akt , Fator de Transcrição STAT3 , Transdução de Sinais , Animais , Janus Quinase 2/metabolismo , Fator de Transcrição STAT3/metabolismo , Alcaloides de Amaryllidaceae/farmacologia , Tetracloreto de Carbono/toxicidade , Transdução de Sinais/efeitos dos fármacos , Proteínas Proto-Oncogênicas c-akt/metabolismo , Camundongos , Masculino , Células Estreladas do Fígado/efeitos dos fármacos , Células Estreladas do Fígado/metabolismo , Células Estreladas do Fígado/patologia , Cirrose Hepática/tratamento farmacológico , Cirrose Hepática/induzido quimicamente , Cirrose Hepática/patologia , Cirrose Hepática/metabolismo , Fenantridinas/farmacologia , Fenantridinas/uso terapêutico , Fosfatidilinositol 3-Quinases/metabolismo , Camundongos Endogâmicos C57BL , Linhagem Celular
6.
Mol Biol Rep ; 51(1): 475, 2024 Mar 29.
Artigo em Inglês | MEDLINE | ID: mdl-38553662

RESUMO

BACKGROUND: Patients with chronic liver disease were found nearly all to have liver fibrosis, which is characterized by excess accumulation of extracellular matrix (ECM) proteins. While ECM accumulation can prevent liver infection and injury, it can destroy normal liver function and architecture. miRNA's own regulation was involved in DNA methylation change. The purpose of this study is to detect DNA methylation landscape of miRNAs genes in mice liver fibrosis tissues. METHODS: Male mice (10-12 weeks) were injected CCl4 from abdominal cavity to induced liver fibrosis. 850 K BeadChips were used to examine DNA methylation change in whole genome. The methylation change of 16 CpG dinucleotides located in promoter regions of 4 miRNA genes were detected by bisulfite sequencing polymerase chain reaction (BSP) to verify chip data accuracy, and these 4 miRNA genes' expressions were detected by RT-qPCR methods. RESULTS: There are 769 differential methylation sites (DMS) in total between fibrotic liver tissue and normal mice liver tissue, which were related with 148 different miRNA genes. Chips array data were confirmed by bisulfite sequencing polymerase chain reaction (R = 0.953; P < 0.01). GO analysis of the target genes of 2 miRNA revealed that protein binding, cytoplasm and chromatin binding activity were commonly enriched; KEGG pathway enrichment analysis displayed that TGF-beta signaling pathway was commonly enriched. CONCLUSION: The DNA of 148 miRNA genes was found to have methylation change in liver fibrosis tissue. These discoveries in miRNA genes are beneficial to future miRNA function research in liver fibrosis.


Assuntos
Metilação de DNA , MicroRNAs , Sulfitos , Humanos , Masculino , Camundongos , Animais , Metilação de DNA/genética , Cirrose Hepática/genética , Cirrose Hepática/metabolismo , MicroRNAs/genética , MicroRNAs/metabolismo , DNA/metabolismo
7.
Mol Biol Rep ; 51(1): 734, 2024 Jun 14.
Artigo em Inglês | MEDLINE | ID: mdl-38874773

RESUMO

BACKGROUND: Liver cirrhosis, a prevalent chronic liver disease, is characterized by liver fibrosis as its central pathological process. Recent advancements highlight the clinical efficacy of umbilical cord mesenchymal stem cell (UC-MSC) therapy in the treatment of liver cirrhosis. METHODS AND RESULTS: We investigated the pharmacodynamic effects of UC-MSCs and MSC conditional medium (MSC-CM) in vivo, utilizing a carbon tetrachloride (CCl4)-induced fibrotic rat model. Concurrently, we assessed the in vitro impact of MSCs and MSC-CM on various cellular process of hepatic stellate cells (HSCs), including proliferation, apoptosis, activation, immunomodulatory capabilities, and inflammatory factor secretion. Our results indicate that both MSCs and MSC-CM significantly ameliorate the pathological extent of fibrosis in animal tissues, reducing the collagen content, serum biochemical indices and fibrosis biomarkers. In vitro, MSC-CM significantly inhibited the activation of the HSC line LX-2. Notably, MSC-CM modulated the expression of type I procollagen and TGFß-1 while increasing MMP1 expression. This modulation restored the MMP1/TIMP1 ratio imbalance and extracellular matrix deposition in TGFß-1 induced fibrosis. Both MSCs and MSC-CM not only induced apoptosis in HSCs but also suppressed proliferation and inflammatory cytokine release from activated HSCs. Furthermore, MSCs and MSC-CM exerted a suppressive effect on total lymphocyte activation. CONCLUSIONS: UC-MSCs and MSC-CM primarily modulate liver fibrosis severity by regulating HSC activation. This study provides both in vivo and in vitro pharmacodynamic evidence supporting the use of MSCs in liver fibrosis treatment.


Assuntos
Apoptose , Proliferação de Células , Células Estreladas do Fígado , Cirrose Hepática , Transplante de Células-Tronco Mesenquimais , Células-Tronco Mesenquimais , Cordão Umbilical , Células Estreladas do Fígado/metabolismo , Células-Tronco Mesenquimais/metabolismo , Animais , Humanos , Cirrose Hepática/patologia , Cirrose Hepática/terapia , Cirrose Hepática/metabolismo , Cordão Umbilical/citologia , Ratos , Transplante de Células-Tronco Mesenquimais/métodos , Masculino , Tetracloreto de Carbono , Modelos Animais de Doenças , Meios de Cultivo Condicionados/farmacologia , Ratos Sprague-Dawley , Inibidor Tecidual de Metaloproteinase-1/metabolismo , Linhagem Celular , Citocinas/metabolismo
8.
Biol Res ; 57(1): 32, 2024 May 27.
Artigo em Inglês | MEDLINE | ID: mdl-38797855

RESUMO

BACKGROUND: The liver serves as a metabolic hub within the human body, playing a crucial role in various essential functions, such as detoxification, nutrient metabolism, and hormone regulation. Therefore, protecting the liver against endogenous and exogenous insults has become a primary focus in medical research. Consequently, the potential hepatoprotective properties of multiple 4-phenyltetrahydroquinolines inspired us to thoroughly study the influence of four specially designed and synthesized derivatives on carbon tetrachloride (CCl4)-induced liver injury in rats. METHODS AND RESULTS: Seventy-seven Wistar albino male rats weighing 140 ± 18 g were divided into eleven groups to investigate both the toxicity profile and the hepatoprotective potential of 4-phenyltetrahydroquinolines. An in-vivo hepatotoxicity model was conducted using CCl4 (1 ml/kg body weight, a 1:1 v/v mixture with corn oil, i.p.) every 72 h for 14 days. The concurrent treatment of rats with our newly synthesized compounds (each at a dose of 25 mg/kg body weight, suspended in 0.5% CMC, p.o.) every 24 h effectively lowered transaminases, preserved liver tissue integrity, and mitigated oxidative stress and inflammation. Moreover, the histopathological examination of liver tissues revealed a significant reduction in liver fibrosis, which was further supported by the immunohistochemical analysis of α-SMA. Additionally, the expression of the apoptotic genes BAX and BCL2 was monitored using real-time PCR, which showed a significant decrease in liver apoptosis. Further investigations unveiled the ability of the compounds to significantly decrease the expression of autophagy-related proteins, Beclin-1 and LC3B, consequently inhibiting autophagy. Finally, our computer-assisted simulation dockingonfirmed the obtained experimental activities. CONCLUSION: Our findings suggest that derivatives of 4-phenyltetrahydroquinoline demonstrate hepatoprotective properties in CCl4-induced liver damage and fibrosis in rats. The potential mechanism of action may be due to the inhibition of autophagy in liver cells.


Assuntos
Autofagia , Tetracloreto de Carbono , Doença Hepática Induzida por Substâncias e Drogas , Quinolinas , Ratos Wistar , Animais , Autofagia/efeitos dos fármacos , Masculino , Doença Hepática Induzida por Substâncias e Drogas/prevenção & controle , Doença Hepática Induzida por Substâncias e Drogas/tratamento farmacológico , Ratos , Quinolinas/farmacologia , Estresse Oxidativo/efeitos dos fármacos , Fígado/efeitos dos fármacos , Fígado/patologia , Fígado/metabolismo , Substâncias Protetoras/farmacologia , Apoptose/efeitos dos fármacos , Modelos Animais de Doenças
9.
Mar Drugs ; 22(3)2024 Mar 08.
Artigo em Inglês | MEDLINE | ID: mdl-38535469

RESUMO

Chitosan oligosaccharides are the degradation products of chitin obtained from the shell extracts of shrimps and crabs. Compared with chitosan, chitosan oligosaccharides have better solubility and a wider application range. In this study, high-molecular-weight chitosan oligosaccharides (COST, chitosan oligosaccharides, MW ≤ 1000) were isolated and purified by a GPC gel column, and the molecular weight range was further reduced to obtain high-purity and low-molecular-weight chitosan (COS46). Compared with COST, COS46 is better at inhibiting CCl4-induced cell death, improving cell morphology, reducing ALT content, and improving cell antioxidant capacity. The effects of COST and COS46 on CCl4-induced acute liver injury were further verified in mice. Both COS46 and COST improved the appearance of the liver induced by CCl4, decreased the levels of ALT and AST in serum, and decreased the oxidation/antioxidant index in the liver. From the liver pathological section, the effect of COS46 was better. In addition, some indicators of COS46 showed a dose-dependent effect. In conclusion, compared with COST, low-molecular-weight COS46 has better antioxidant capacity and a better therapeutic effect on CCl4-induced acute liver injury.


Assuntos
Quitosana , Animais , Camundongos , Antioxidantes , Fígado , Morte Celular , Oligossacarídeos
10.
Ecotoxicol Environ Saf ; 282: 116734, 2024 Sep 01.
Artigo em Inglês | MEDLINE | ID: mdl-39024951

RESUMO

Hepatic diseases pose a significant threat to community health, impacting the quality of life and longevity of millions worldwide. Despite revolutionary advancements in treatment, liver diseases remain a pressing issue, necessitating the development of more effective therapeutic approaches. Here, we conducted a comprehensive multi-omics analysis to investigate the underlying mechanism of Swertiamarin in alleviating hepatic injuries induced by CCl4 in mice. We divided 100 Kunming mice into five groups: RC (control), RM (CCl4), RD (15 mg/Kg Swertiamarin), RZ (30 mg/Kg Swertiamarin), and RG (60 mg/Kg Swertiamarin). Animals in groups RD, RZ, and RG received daily Swertiamarin via gavage, while those in groups RM, RD, RZ, and RG were treated with CCl4 solution intraperitoneally every four days, nine times in total. Our findings revealed that mice in the RM group exhibited slightly lower average weights compared to other groups, along with significantly higher liver weight (p<0.0001) and liver index (p<0.0001). Pathological analysis indicated liver damage characterized by cell degeneration, inflammatory cell infiltration, and hepatic fibrosis in the CCl4-induced group. In contrast, Swertiamarin supplementation mitigated these effects, reducing denatured cells, inflammatory cells, and collagenous fibers in the liver. Serum analysis showed elevated levels of TNF-α (p<0.001), IL-6 (p<0.05), ALT (p<0.001), AST (p<0.0001), MDA (p<0.001), and Hyp (p<0.001) in CCl4-induced animals, along with lower levels of T-AOC (p<0.001), GSH-px (p<0.0001), SOD (p<0.001), and CAT (p<0.01). Microbiome analysis revealed significant differences among groups, with pathogenic taxa such as Arthrinium and Aureobasidium, and probiotic Saccharomyces showing notable variations. Metabolomics analysis identified numerous differentially abundant metabolites, with Swertiamarin-treated animals exhibiting distinct profiles. Our findings highlight the potential of Swertiamarin ameliorating CCl4-induced liver toxicity through modulation of antioxidant capacity, inflammatory response, gut microbiota, and metabolites. These insights may inform the development of novel therapies for liver injury.


Assuntos
Tetracloreto de Carbono , Doença Hepática Induzida por Substâncias e Drogas , Glucosídeos Iridoides , Fígado , Pironas , Animais , Pironas/farmacologia , Glucosídeos Iridoides/farmacologia , Camundongos , Fígado/efeitos dos fármacos , Fígado/patologia , Doença Hepática Induzida por Substâncias e Drogas/tratamento farmacológico , Masculino , Metabolômica , Estresse Oxidativo/efeitos dos fármacos , Multiômica , Animais não Endogâmicos
11.
Ultrastruct Pathol ; 48(1): 16-28, 2024 Jan 02.
Artigo em Inglês | MEDLINE | ID: mdl-37997442

RESUMO

Liver disease accounts for approximately 2 million deaths er year worldwide. Liver fibrisis results from chronic injury to the liver. If not effectively treated in time, liver fibrosis may transform into liver cirrhosis. MVs are recognized as potential biomarkers and important theraputic tools for a wide sectrum of diseases. Medical ozone has the ability to protect the body against pathological conditions caused by oxidative stress. The influence of ozone and MVs on CCL4 induced liver fibrosis was investigated in this study. Forty-eight adult male albino rats were divided into four equal groups. I control, II CCL4 group, III ozone and IV microvesicles groups. Liver fibrosis was induced in group II, III & IV using 12 SC injections (0.5 ml/kg body weight) of CCL4 dissolved in olive oil twice ber week for weeks. Blood samples were obtained to estimate serum ALT & AST. Liver tissues were processed for measurment of GSH & SOD, light and electron microscopic examination. H&E staine sections og group II showed dilated congested sinusoids and centralveins, mononuclear infiltrations, vacuolations and dark nuclei. Ultrastructurally, group II revealed irregular heterochromatic nuclei of hepatocytes, small scanty mitochondria & vacuolations. Morphometric & statistical analyses were performed. Group III showed some improvement, however, group IV showed more imrovement. The results indicates that MVs caused marked improvement than ozone against CCL4 induced liver damage via antioxidant & antiinflammatory properties.


Assuntos
Doença Hepática Crônica Induzida por Substâncias e Drogas , Doença Hepática Induzida por Substâncias e Drogas , Células-Tronco Mesenquimais , Ratos , Animais , Masculino , Doença Hepática Crônica Induzida por Substâncias e Drogas/metabolismo , Doença Hepática Crônica Induzida por Substâncias e Drogas/patologia , Fígado , Antioxidantes/farmacologia , Cirrose Hepática/induzido quimicamente , Cirrose Hepática/metabolismo , Cirrose Hepática/patologia , Estresse Oxidativo , Doença Hepática Induzida por Substâncias e Drogas/patologia
12.
Ultrastruct Pathol ; 48(3): 153-171, 2024 May 03.
Artigo em Inglês | MEDLINE | ID: mdl-38654519

RESUMO

BACKGROUNDS: Chronic kidney disease (CKD) is a global public health problem. All progressive chronic kidney disease (CKD) is characterized by tubulointerstitial fibrosis. Exposure to high concentrations of carbon tetrachloride (including vapor) can destroy the kidneys. Autophagy played an important role in maintaining the homeostasis of organs. Impaired autophagy was frequently associated with renal damage and fibrosis. Recent data suggests that metformin protects against a variety of kidney disorders. AIM: To investigate the protective role of metformin on carbon tetrachloride induced renal damage via autophagy pathway. MATERIALS AND METHODS: Forty adult male albino rats were divided into four equal groups (10 rats, each); Group 1: control group. Group 2: olive oil group received olive oil 1.5 mg/kg twice weekly S.C for 12 weeks. Group 3: The ccl4 group, the rats were received ccl4 1.5 mg/kg twice weekly S.C for 12 weeks. Group 4: CCL4 and Metformin group received concomitant treatment of CCL4, 1.5 mg/kg twice weekly S.C and 100 mg/kg/day Metformin orally for 12 weeks. After sacrifice, kidneys were taken from all animal groups and processed for light and electron microscopy, immunological studies and biochemical tests. Statistical analysis was done. RESULTS: Administration of ccl4 resulted in histopathological changes in the kidney tissue in the form of areas of tissue destruction, inflammatory cell infiltration, congestion and fibrosis. Ultrastructurally, irregular thickening of GBM was observed. Improvement was noticed with concomitant treatment of ccl4 with metformin. CONCLUSION: Metformin administration can modulate histological and biochemical effects in the renal tissue induced by of ccl4.


Assuntos
Autofagia , Tetracloreto de Carbono , Fibrose , Rim , Metformina , Animais , Metformina/farmacologia , Masculino , Autofagia/efeitos dos fármacos , Ratos , Tetracloreto de Carbono/toxicidade , Rim/patologia , Rim/efeitos dos fármacos , Rim/ultraestrutura , Insuficiência Renal Crônica/patologia , Insuficiência Renal Crônica/tratamento farmacológico
13.
Chem Biodivers ; 21(2): e202301429, 2024 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-38221801

RESUMO

Short Title: Benzimidazoisoquinoline derivatives as potent antifibrotics Hepatic fibrosis is a pathological condition of liver disease with an increasing number of cases worldwide. Therapeutic strategies are warranted to target the activated hepatic stellate cells (HSCs), the collagen-producing cells, an effective strategy for controlling the disease progression. Benzimidazoisoquinoline derivatives were synthesized as hybrid molecules by the combination of benzimidazoles and isoquinolines to evaluate their anti-fibrotic potential using an in-vitro and in-vivo model of hepatic fibrosis. A small library of benzimidazoisoquinoline derivatives (1-17 and 18-21) was synthesized from 2-aryl benzimidazole and acetylene functionalities through C-H and N-H activation. Compounds (10 and its recently synthesized derivatives 18-21) depicted a significant decrease in PDGF-BB and/or TGFß-induced proliferation (1.7-1.9 -fold), migration (3.5-5.0 -fold), and fibrosis-related gene expressions in HSCs. These compounds could revert the hepatic damage caused by chronic exposure to hepatotoxicants, ethanol, and/or carbon tetrachloride as evident from the histological, biochemical, and molecular analysis. Anti-fibrotic effect of the compounds was supported by the decrease in the malondialdehyde level, collagen deposition, and gene expression levels of fibrosis-related markers such as α-SMA, COL1α1, PDGFRß, and TGFRIIß in the preclinical models of hepatic fibrosis. In conclusion, the synthesized benzimidazoisoquinoline derivatives (compounds 18, 19, 20, and 21) possess anti-fibrotic therapeutic potential against liver fibrosis.


Assuntos
Colágeno , Cirrose Hepática , Camundongos , Animais , Cirrose Hepática/induzido quimicamente , Cirrose Hepática/tratamento farmacológico , Fibrose , Colágeno/farmacologia , Fígado
14.
Ren Fail ; 46(2): 2319330, 2024 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-39049729

RESUMO

AIM: This study explores the possible therapeutic role of rats and mice bone marrow-derived mesenchymal stem cells (BM-MSCs) on renal damage and toxicity brought on by carbon tetrachloride (CCl4) in Wistar rats. METHODS: Following an intraperitoneal injection of CCl4 (0.5 mL/kg b.w. twice weekly) for eight weeks, male Wistar rats were intravenously treated with rats and mice BM-MSCs (1 × 106 cells in 0.2 mL Dulbecco's Modified Eagle Medium (DMEM)/rat/week) a week for four weeks. Kidney functions were evaluated and kidney samples were examined using hematoxylin and eosin (H&E), Masson's trichrome (MT) staining techniques, and electron microscopy analysis. Kidney cyclooxygenase-2 (COX-2), protein 53 (p53), and tumor necrosis factor-α (TNF-α) were detected by immunohistochemical staining techniques. Additionally, bioindicators of oxidative stress and antioxidant defense systems were identified in kidney tissue. RESULTS: In CCl4-injected rats, serum creatinine, urea, and uric acid levels significantly increased, as did renal lipid peroxidation (LPO), while superoxide dismutase, glutathione peroxidase (GPx), glutathione (GSH) transferase, and GSH levels significantly dropped in the kidneys. Histologically, the kidneys displayed a wide range of structural abnormalities, such as glomerular shrinkage, tubular dilations, inflammatory leukocytic infiltration, fibroblast proliferation, and elevated collagen content. Inflammatory cytokines like COX-2 and TNF-α as well as the pro-apoptotic mediator p53 were considerably upregulated. Treatment of BM-MSCs from mice and rats with CCl4-injected rats considerably reduced the previously noted abnormalities. CONCLUSIONS: By boosting antioxidant defense and reducing apoptosis and inflammation, BM-MSCs from mice and rats were able to enhance kidney function and histological integrity in rats that had received CCl4 injections.


Assuntos
Tetracloreto de Carbono , Fibrose , Rim , Células-Tronco Mesenquimais , Animais , Masculino , Camundongos , Ratos , Injúria Renal Aguda/metabolismo , Injúria Renal Aguda/terapia , Injúria Renal Aguda/patologia , Injúria Renal Aguda/induzido quimicamente , Tetracloreto de Carbono/toxicidade , Ciclo-Oxigenase 2/metabolismo , Modelos Animais de Doenças , Rim/patologia , Peroxidação de Lipídeos , Transplante de Células-Tronco Mesenquimais/métodos , Células-Tronco Mesenquimais/metabolismo , Estresse Oxidativo , Ratos Wistar , Fator de Necrose Tumoral alfa/metabolismo
15.
Int J Mol Sci ; 25(13)2024 Jul 05.
Artigo em Inglês | MEDLINE | ID: mdl-39000518

RESUMO

While obesity-related nonalcoholic fatty liver disease (NAFLD) is linked with metabolic dysfunctions such as insulin resistance and adipose tissue inflammation, lean NAFLD more often progresses to liver fibrosis even in the absence of metabolic syndrome. This review aims to summarize the current knowledge regarding the mechanisms of liver fibrosis in lean NAFLD. The most commonly used lean NAFLD models include a methionine/choline-deficient (MCD) diet, a high-fat diet with carbon tetrachloride (CCl4), and a high-fructose and high-cholesterol diet. The major pro-fibrogenic mechanisms in lean NAFLD models include increased activation of the extracellular signal-regulated kinase (ERK) pathway, elevated expression of α-smooth muscle actin (α-SMA), collagen type I, and TGF-ß, and modulation of fibrogenic markers such as tenascin-X and metalloproteinase inhibitors. Additionally, activation of macrophage signaling pathways promoting hepatic stellate cell (HSC) activation further contributes to fibrosis development. Animal models cannot cover all clinical features that are evident in patients with lean or obese NAFLD, implicating the need for novel models, as well as for deeper comparisons of clinical and experimental studies. Having in mind the prevalence of fibrosis in lean NAFLD patients, by addressing specific pathways, clinical studies can reveal new targeted therapies along with novel biomarkers for early detection and enhancement of clinical management for lean NAFLD patients.


Assuntos
Cirrose Hepática , Hepatopatia Gordurosa não Alcoólica , Obesidade , Humanos , Hepatopatia Gordurosa não Alcoólica/metabolismo , Hepatopatia Gordurosa não Alcoólica/patologia , Hepatopatia Gordurosa não Alcoólica/etiologia , Obesidade/metabolismo , Obesidade/complicações , Cirrose Hepática/metabolismo , Cirrose Hepática/patologia , Cirrose Hepática/etiologia , Animais , Células Estreladas do Fígado/metabolismo , Modelos Animais de Doenças
16.
Int J Mol Sci ; 25(3)2024 Jan 23.
Artigo em Inglês | MEDLINE | ID: mdl-38338661

RESUMO

Better understanding of molecular changes leading to neoplastic transformation is prerequisite to optimize risk assessment and chemopreventive and surveillance strategies. Data on macrophage inflammatory proteins (MIPs) in colorectal carcinogenesis are scanty and their clinical relevance remains unknown. Therefore, transcript and protein expression of CCL3, CCL4, CXCL2, and CCL19 were determined in 173 and 62 patients, respectively, using RT-qPCR and immunohistochemistry with reference to polyps' characteristics. The likelihood of malignancy was modeled using probit regression. With the increasing malignancy potential of hyperplastic-tubular-tubulo-villous-villous polyps, the expression of CCL3, CCL4, and CCL19 in lesions decreased. CCL19 expression decreased also in normal mucosa while that of CXCL2 increased. Likewise, lesion CCL3 and lesion and normal mucosa CCL19 decreased and normal CXCL2 increased along the hyperplasia-low-high dysplasia grade. The bigger the lesion, the lower CCL3 and higher CXCL2 in normal mucosa. Singular polyps had higher CCL3, CCL4, and CCL19 levels in normal mucosa. CCL3, CCL4 and CXCL2 modulated the likelihood of malignancy associated with traditional risk factors. There was no correlation between the protein and mRNA expression of CCL3 and CCL19. In summary, the polyp-adjacent mucosa contributes to gaining potential for malignancy by polyps. MIPs may help in specifying cancerization probability estimated based on standard risk factors.


Assuntos
Pólipos do Colo , Neoplasias Colorretais , Humanos , Pólipos do Colo/genética , Pólipos do Colo/patologia , Neoplasias Colorretais/patologia , Proteínas Inflamatórias de Macrófagos , Fatores de Risco , Hiperplasia
17.
Toxicol Mech Methods ; 34(5): 469-483, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38166523

RESUMO

The modulatory role of primrose oil (PO) supplementation enriched with γ-linolenic acid and D/L-alpha tocopherol acetate against a carbon tetrachloride (CCl4)-induced liver damage model was assessed in this study. Twenty male Albino rats were divided into four groups. The control group received corn oil orally. The PO group received 10 mg/kg P O orally. The CCl4 group received 2 mL/kg CCl4 orally and PO/CCl4 group; received PO and 2 mL/kg CCl4 orally. The relative liver weight was recorded. Serum liver enzymes, hepatic malondialdehyde (MDA), hepatic reduced glutathione (GSH) and the expression of hepatic tumor necrosis factor-alpha (TNF-α), interleukin 1 beta (IL-1ß), and interleukin 6 (IL-6) were assessed. The binding affinities of γ-linolenic acid and D/L-alpha tocopherol constituents with IL-1ß, IL-6 and TNF-α were investigated using molecular docking simulations. Histopathological and electron microscopic examinations of the liver were performed. The results indicated that CCl4 elevated serum liver enzyme and hepatic MDA levels, whereas GSH levels were diminished. The upregulation of IL-1ß, IL-6, and TNF-α gene expressions were induced by CCl4 treatment. The PO/CCl4-treated group showed amelioration of hepatic injury biomarkers and oxidative stress. Restoration of histopathological and ultrastructural alterations while downregulations the gene expressions of TNF-α, IL1-ß and IL-6 were observed. In conclusion, evening primrose oil enriched with γ-linolenic acid and D/L-alpha tocopherol acetate elicited a potential amelioration of CCl4-induced hepatic toxicity.


Assuntos
Doença Hepática Induzida por Substâncias e Drogas , Fígado , Oenothera biennis , Óleos de Plantas , Ácido gama-Linolênico , Animais , Masculino , Doença Hepática Induzida por Substâncias e Drogas/prevenção & controle , Doença Hepática Induzida por Substâncias e Drogas/patologia , Doença Hepática Induzida por Substâncias e Drogas/metabolismo , Doença Hepática Induzida por Substâncias e Drogas/tratamento farmacológico , Óleos de Plantas/farmacologia , Óleos de Plantas/química , Fígado/efeitos dos fármacos , Fígado/metabolismo , Fígado/patologia , Fígado/ultraestrutura , Ácido gama-Linolênico/farmacologia , Oenothera biennis/química , Interleucina-1beta/metabolismo , Fator de Necrose Tumoral alfa/metabolismo , Fator de Necrose Tumoral alfa/genética , Estresse Oxidativo/efeitos dos fármacos , Simulação de Acoplamento Molecular , Tetracloreto de Carbono/toxicidade , Interleucina-6/metabolismo , Ratos , Ácidos Linoleicos/farmacologia , Antioxidantes/farmacologia , Ratos Wistar , Transdução de Sinais/efeitos dos fármacos , Modelos Animais de Doenças
18.
Cytokine ; 172: 156386, 2023 12.
Artigo em Inglês | MEDLINE | ID: mdl-37852157

RESUMO

OBJECTIVE: Human adipose-derived mesenchymal stem cell exosomes (ADSC-Exos) are active constituents for treating liver fibrosis. This paper attempted to preliminarily explain the functional mechanism of ADSC-Exos in liver fibrosis through the p38 MAPK/NF-κB pathway. METHODS: The cell models of hepatic fibrosis were established by inducing LX-2 cells with TGF-ß1. Mouse models of liver fibrosis were established by treating mice with CCl4. The in vivo and in vitro models of liver fibrosis were treated with ADSC-Exos. ADSCs were identified by flow cytometry/Alizarin red/oil red O/alcian blue staining. ADSC-Exos were identified by transmission electron microscopy, nanoparticle tracking analysis, and Western blot. LX-2 cell proliferation/viability were evaluated by MTT/BrdU assays. Exosomes were tracked in vivo and body weight changes in mice were monitored. Hepatic pathological changes were observed by HE/Masson staining. α-SMA/collagen I levels in liver tissues were assessed by immunohistochemistry. HA/PIIINP concentrations were measured using the magnetic particle chemiluminescence method. Liver function was assessed using an automatic analyzer. miR-20a-5p level was measured by RT-qPCR. The mRNA levels of fibrosis markers were determined by RT-qPCR, and their protein levels and levels of MAPK/NF-κB pathway-related proteins, as well as TGFBR2 protein level were measured by Western blot. The P65 nuclear expression in mouse liver tissues was quantified by immunofluorescence. RESULTS: ADSC-Exos suppressed TGF-ß1-induced LX-2 cell proliferation and fibrosis and reduced mRNA and protein levels of fibrosis markers in vitro. ADSC-Exos ameliorated liver fibrosis by inhibiting the p38 MAPK/NF-κB pathway activation. ADSC-Exos inhibited activation of the p38 MAPK/NF-κB pathway via regulating the miR-20a-5p/TGFBR2 axis. The in vivo experiment asserted that ADSC-Exos were mainly distributed in the liver, and ADSC-Exos relieved liver fibrosis in mice, which was evidenced by alleviating decreased body weight, reducing collagen and enhancing liver function, and repressed the activation of the p38 MAPK/NF-κB pathway via the miR-20a-5p/TGFBR2 axis. CONCLUSION: ADSC-Exos attenuated liver fibrosis by suppressing the activation of the p38 MAPK/NF-κB pathway via the miR-20a-5p/TGFBR2 axis.


Assuntos
Exossomos , Células-Tronco Mesenquimais , MicroRNAs , Camundongos , Humanos , Animais , NF-kappa B/metabolismo , Fator de Crescimento Transformador beta1 , Receptor do Fator de Crescimento Transformador beta Tipo II/genética , Exossomos/metabolismo , Proteínas Quinases p38 Ativadas por Mitógeno , Cirrose Hepática/genética , Cirrose Hepática/terapia , Células-Tronco Mesenquimais/metabolismo , Fibrose , Colágeno , MicroRNAs/genética , RNA Mensageiro , Peso Corporal
19.
FASEB J ; 36(4): e22224, 2022 04.
Artigo em Inglês | MEDLINE | ID: mdl-35218575

RESUMO

Yes-associated protein (YAP), a central effector in the Hippo pathway, is involved in the regulation of organ size, stem cell self-renewal, and tissue regeneration. In this study, we observed YAP activation in patients with alcoholic steatosis, hepatitis, and cirrhosis. Accumulation of this protein in the nucleus was also observed in murine livers that were damaged after chronic-plus-single binge or moderate ethanol ingestion combined with carbon tetrachloride intoxication (ethanol/CCl4 ). To understand the role of this transcriptional coactivator in alcohol-related liver injury, we knocked out the Yap1 gene in hepatocytes of floxed homozygotes through adeno-associated virus (AAV8)-mediated deletion utilizing Cre recombinase. Yap1 hepatocyte-specific knockouts (KO) exhibited hemorrhage, massive hepatic necrosis, enhanced oxidative stress, elevated hypoxia, and extensive infiltration of CD11b+ inflammatory cells into hepatic microenvironments rich for connective tissue growth factor (Ctgf) during ethanol/CCl4 -induced liver damage. Analysis of whole-genome transcriptomics indicated upregulation of genes involved in hypoxia and extracellular matrix (ECM) remodeling, whereas genes related to hepatocyte proliferation, progenitor cell activation, and ethanol detoxification were downregulated in the damaged livers of Yap1 KO. Acetaldehyde dehydrogenase (Aldh)1a1, a gene that encodes a detoxification enzyme for aldehyde substrates, was identified as a potential YAP target because this gene could be transcriptionally activated by a hyperactive YAP mutant. The ectopic expression of the human ALDH1A1 gene caused increase in hepatocyte proliferation and decrease in hepatic necrosis, oxidative stress, ECM remodeling, and inflammation during ethanol/CCl4 -induced liver damage. Taken together, these observations indicated that YAP was crucial for liver repair during alcohol-associated injury. Its regulation of ALDH1A1 represents a new link in liver regeneration and detoxification.


Assuntos
Família Aldeído Desidrogenase 1/metabolismo , Doença Hepática Induzida por Substâncias e Drogas/prevenção & controle , Etanol/toxicidade , Regeneração Hepática , Retinal Desidrogenase/metabolismo , Proteínas de Sinalização YAP/fisiologia , Família Aldeído Desidrogenase 1/genética , Animais , Proliferação de Células , Doença Hepática Induzida por Substâncias e Drogas/etiologia , Doença Hepática Induzida por Substâncias e Drogas/metabolismo , Feminino , Humanos , Camundongos , Camundongos Endogâmicos C57BL , Camundongos Knockout , Retinal Desidrogenase/genética , Transdução de Sinais
20.
Mol Biol Rep ; 50(1): 97-106, 2023 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-36308582

RESUMO

BACKGROUND: Carbon tetrachloride (CCl4) is highly toxic to animal liver and is a major contributor to liver injury. Gomphrena globosa L. (GgL) is an edible plant with anti-inflammation and antioxidation properties. The aim of this study was to investigate the potential therapeutic effects of GgL on liver injury. METHODS AND RESULTS: A model of chronic liver injury in mice was established by intraperitoneal injection of CCl4 (0.4 mL/kg) for 3 weeks, and the mice were treated intraperitoneally with different concentrations of GgL crude extract (GgCE; 100, 200, 300 mg/kg) or Bifendatatum (Bif; 20 mg/kg) in the last 2 weeks. The results showed that GgCE treatment alleviated the liver injury, improved the pathological changes caused by CCl4 on the mice liver, and enhance the antioxidant capacity. We also found that GgCE increased the expression of antioxidant stress related proteins, decreased the phosphorylation levels of autophagy related proteins PI3K and mTOR, and decreased the expression of LC3 II and P62 proteins. CONCLUSION: These results suggest that GgCE alleviated CCl4-induced chronic liver injury in mice by activating antioxidant signaling pathways and promoting autophagy, indicating a potential therapeutic effect of GgCE on liver injury.


Assuntos
Doença Hepática Crônica Induzida por Substâncias e Drogas , Doença Hepática Induzida por Substâncias e Drogas , Camundongos , Animais , Antioxidantes/farmacologia , Antioxidantes/metabolismo , Doença Hepática Crônica Induzida por Substâncias e Drogas/metabolismo , Doença Hepática Crônica Induzida por Substâncias e Drogas/patologia , Fígado/metabolismo , Transdução de Sinais , Tetracloreto de Carbono/farmacologia , Autofagia , Doença Hepática Induzida por Substâncias e Drogas/metabolismo , Estresse Oxidativo
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