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1.
Mediators Inflamm ; 2022: 5331474, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35677736

RESUMO

The diagnostic value and optimal cutoff level of cardiac troponin I in patients with sepsis have not been studied. In this single hospital retrospective study, we assessed the optimal cutoff value of troponin I for diagnosing non-ST-segment elevation myocardial infarction (NSTEMI) with type 1 myocardial infarction (MI) in patients with sepsis who had undergone a percutaneous coronary intervention from 2009 to 2019. In total, 5,341 patients (excluding patients with chronic kidney disease) were included, of whom 277 had sepsis or septic shock. Of the 123 patients with non-ST-segment elevation acute coronary syndrome (NSTE-ACS) and sepsis, 77 (62.6%) were diagnosed with NSTEMI with type 1 MI. The receiver-operating characteristic curve showed an area under the curve (AUC) of 0.705 for diagnosis of NSTEMI with type 1 MI with a troponin I cutoff of >300 ng/L (sensitivity: 68.4%, specificity: 70.2%, Youden index: 0.386). Multiple linear regression showed no significant predictors of NSTEMI with type 1 MI. Troponin level and the Global Registry of Acute Coronary Events (GRACE) scores were correlated (R 2 = 0.0625, p = 0.032) and showed comparable predictive value for 6-month mortality (AUC: 0.637 and 0.611, respectively, p = 0.7651). The optimal troponin I cutoff to effectively diagnose NSTEMI with type 1 MI in patients with sepsis was 300 ng/L.


Assuntos
Síndrome Coronariana Aguda , Infarto do Miocárdio , Infarto do Miocárdio sem Supradesnível do Segmento ST , Infarto do Miocárdio com Supradesnível do Segmento ST , Sepse , Síndrome Coronariana Aguda/diagnóstico , Eletrocardiografia , Humanos , Infarto do Miocárdio sem Supradesnível do Segmento ST/diagnóstico , Estudos Retrospectivos , Sepse/diagnóstico , Troponina I
2.
J Cell Physiol ; 234(11): 20128-20138, 2019 11.
Artigo em Inglês | MEDLINE | ID: mdl-30980393

RESUMO

Carboxyl-terminus of Hsc70 interacting protein (CHIP) is a chaperone-dependent E3-ubiquitin ligase with important function in protein quality control system. In the current research endeavor, we have investigated the putative role of CHIP in lipopolysaccharides (LPS)-induced cardiomyopathies. Basically, H9c2 cardiomyoblasts were transfected with CHIP for 24 hr, and thereafter, treated with LPS for 12 hr. Concomitantly, western blot analysis, actin staining, terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) assay, and coimmunoprecipitation studies were performed to investigate the underlying intricacies. Interestingly, western blot analysis revealed that the expression of hypertrophy and apoptosis-related proteins were considerably reduced following overexpression of CHIP. Moreover, Actin staining and TUNEL assay further ascertained the attenuation of cardiac hypertrophy and apoptosis following overexpression of CHIP respectively. These aspects instigate the role of CHIP in attenuation of LPS-induced cardiomyopathies. Additionally and importantly, co-immunoprecipitation and western blot studies revealed that CHIP plausibly promotes degradation of nuclear factor of activated T cells 3 (NFATc3) through ubiquitin-proteasomal pathway. Taken together, our study reveals that CHIP attenuates LPS-induced cardiac hypertrophy and apoptosis perhaps by promoting NFATc3 proteasomal degradation.


Assuntos
Apoptose/fisiologia , Cardiomegalia/metabolismo , Fatores de Transcrição NFATC/metabolismo , Complexo de Endopeptidases do Proteassoma/metabolismo , Ubiquitina-Proteína Ligases/metabolismo , Animais , Cardiomegalia/induzido quimicamente , Cardiomiopatias/metabolismo , Linhagem Celular , Marcação In Situ das Extremidades Cortadas/métodos , Lipopolissacarídeos/farmacologia , Chaperonas Moleculares/metabolismo , Ratos , Ubiquitina/metabolismo , Ubiquitinação/fisiologia
3.
J Cell Biochem ; 120(10): 16703-16710, 2019 10.
Artigo em Inglês | MEDLINE | ID: mdl-31081962

RESUMO

Myocardial dysfunction is clinically relevant? repercussion that follows sepsis. Tid 1 protein has been implicated in many biological process. However, the role of Tid 1 in lipopolysaccharide (LPS)-induced cardiomyocyte hypertrophy and apoptosis remains elusive. In the current research endeavor, we have elucidated the role of Tid1-S on LPS-induced cardiac hypertrophy and apoptosis. Interestingly, we found that overexpression of Tid1-S suppressed TLR-4, NFATc3, and BNP protein expression which eventually led to inhibition of LPS-induced cardiac hypertrophy. Moreover, Tid1-S overexpression attenuated cellular apoptosis and activated survival proteins p-PI3K and pser473 Akt. Besides this, Tid1-S overexpression enhanced ER-a protein expression. Collectively, our data suggest that Tid1-S plausibly enhance ER-a protein and further activate p-PI3K and p ser473 Akt survival protein expression; which thereby led to attenuation of LPS-induced apoptosis in cardiomyoblast cells. Interestingly, our data suggest that Tid1-S is involved in attenuation of cardiomyoblast cells damages induced by LPS.


Assuntos
Apoptose/efeitos dos fármacos , Cardiomegalia/metabolismo , Receptor alfa de Estrogênio/metabolismo , Proteínas de Choque Térmico HSP40/metabolismo , Lipopolissacarídeos/toxicidade , Miócitos Cardíacos/metabolismo , Transdução de Sinais/efeitos dos fármacos , Adulto , Idoso , Idoso de 80 Anos ou mais , Animais , Cardiomegalia/induzido quimicamente , Cardiomegalia/patologia , Feminino , Regulação da Expressão Gênica/efeitos dos fármacos , Humanos , Masculino , Pessoa de Meia-Idade , Miócitos Cardíacos/patologia , Fosfatidilinositol 3-Quinases/metabolismo , Proteínas Proto-Oncogênicas c-akt/metabolismo , Ratos
4.
Exp Cell Res ; 363(2): 227-234, 2018 02 15.
Artigo em Inglês | MEDLINE | ID: mdl-29331388

RESUMO

The bZIP transcription factor E4BP4 is a survival factor that is known to be elevated in diseased heart and promote cell survival. In this study the role of E4BP4 on angiotensin-II (AngII)-induced apoptosis has been examined in in vitro cell model. H9c2 cardiomyoblast cells that overexpressed E4BP4 were exposed to AngII to observe the cardio-protective effects of E4BP4 on hypertension related apoptosis. The results from TUNEL assays revealed that E4BP4 significantly attenuated AngII-induced apoptosis. Further analysis by Western blot and RT-PCR showed that E4BP4 inhibited AngII-induced IGF-II mRNA expression and cleavage of caspase-3 through the PI3K-Akt pathway. In addition, E4BP4 enhanced calcium reuptake into the sacroplasmic reticulum by down-regulating PP2A and by up-regulating the phosphorylation of PKA and PLB proteins. Our findings indicate that E4BP4 functions as a survival factor in cardiomyoblasts by inhibiting IGF-II transcription and by regulating calcium cycling.


Assuntos
Apoptose/efeitos dos fármacos , Fatores de Transcrição de Zíper de Leucina Básica/metabolismo , Cálcio/metabolismo , Miócitos Cardíacos/efeitos dos fármacos , Angiotensina II/farmacologia , Regulação da Expressão Gênica/efeitos dos fármacos , Humanos , Miócitos Cardíacos/metabolismo , Fosfatidilinositol 3-Quinases/metabolismo , Proteínas Proto-Oncogênicas c-akt/metabolismo
5.
Environ Toxicol ; 34(2): 210-218, 2019 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-30450786

RESUMO

IGF-IIR activation regulates cardiac remodeling leading to apoptosis. Here, we identified the novel IGF-IIRα (150 KDa), a truncated IGF-IIR transcript enhances cardiac apoptosis under high-salt uptake in transgenic rat model. Echocardiographic analysis revealed decline in ejection fraction and fractional shortening percentage in IGF-IIRα (TG) rats. We found that IGF-IIRα TG rats developed severe apoptosis and fibrosis as identified through TUNEL assay and Masson's trichrome staining. Importantly, the heart functioning, apoptosis, and fibrosis were significantly affected under high-salt conditions in IGF-IIRα (TG) rats. Significant upregulation of apoptosis was evident from decreased Bcl-2, p-AKT, and p-PI3K expressions with concomitant increase in Bad, cytochrome C, cleaved caspase 3 levels. We found that, IGF-IIRα highly induced tissue fibrosis through collagen accumulation (col I, col III) and up regulated various fibrotic markers such as tPA, uPA, TGF-ß, and vimentin expressions. The observed upregulation of fibrosis were significantly regulated under high-salt conditions and their over regulation under IGF-IIRα over expressions shows the key role of IGF-IIRα in promoting high-salt induced fibrosis. During IGF-IIRα over expression induced cardiotoxicity, under high salt condition, and it destroys the interaction between CHIP and HSF1, which promotes the degradation of HSF1 and results in upregulation of IGF-IIR/IGF-IIRα expressions. Altogether, the study unveils novel IGF-IIRα in the regulation of cardiac apoptosis and fibrosis under high-salt diet.


Assuntos
Apoptose/genética , Regulação da Expressão Gênica , Miocárdio/patologia , Receptor IGF Tipo 2/genética , Cloreto de Sódio na Dieta/efeitos adversos , Remodelação Ventricular/genética , Animais , Apoptose/efeitos dos fármacos , Fibrose , Regulação da Expressão Gênica/efeitos dos fármacos , Miocárdio/metabolismo , Ratos , Ratos Transgênicos , Remodelação Ventricular/efeitos dos fármacos
6.
Environ Toxicol ; 34(8): 921-927, 2019 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-31066208

RESUMO

Hyperkalemia is often associated with cardiac dysfunction. In this study an earthworm extract (dilong) was prepared from dried Pheretima aspergillum powder and its effect against high-KCl challenge was determined in H9c2 cardiomyoblast cells. H9c2 cells pre-treated with dilong (31.25, 62.5, 125, and 250 mg/mL) for 24 hours, where challenged with different doses of KCl treatment for 3 hours to determine the protective mechanisms of dilong against cardiac fibrosis. High-KCl administration induced mitochondrial injury and elevated the levels of pro-apoptotic proteins. The mediators of fibrosis such as ERK, uPA, SP1, and CTGF were also found to be upregulated in high-KCl condition. However, dilong treatment enhanced IGF1R/PI3k/Akt activation which is associated with cell survival. In addition, dilong also reversed high-KCl induced cardiac fibrosis related events in H9c2 cells and displayed a strong cardio-protective effect. Therefore, dilong is a potential agent to overcome cardiac events associated with high-KCl toxicity.


Assuntos
Mitocôndrias Cardíacas/efeitos dos fármacos , Mioblastos Cardíacos/efeitos dos fármacos , Oligoquetos , Cloreto de Potássio/toxicidade , Animais , Proteínas Reguladoras de Apoptose/metabolismo , Linhagem Celular , Sobrevivência Celular , Fibrose , Mioblastos Cardíacos/patologia , Substâncias Protetoras/farmacologia
7.
J Mol Cell Cardiol ; 122: 58-68, 2018 09.
Artigo em Inglês | MEDLINE | ID: mdl-30098987

RESUMO

Mitochondrial dysfunction is a major contributor to myocyte loss and the development of heart failure. Myocytes have quality control mechanisms to retain functional mitochondria by removing damaged mitochondria via specialized autophagy, i.e., mitophagy. The underlying mechanisms of fission affect the survival of cardiomyocytes, and left ventricular function in the heart is poorly understood. Here, we demonstrated the direct effect and potential mechanisms of mitochondrial functional defects associated with abnormal mitochondrial dynamics in heart failure. We observed that IGF-IIR signaling produced significant changes in mitochondrial morphology and function; such changes were associated with the altered expression and distribution of dynamin-related protein (Drp1) and mitofusin (Mfn2). IGF-IIR signaled extracellular signal-regulated kinase (ERK) activation to promote Drp1 phosphorylation and translocation to mitochondria for mitochondrial fission and mitochondrial dysfunction. Moreover, IGF-IIR signaling triggered Rab9-dependent autophagosome formation by the JNK-mediated phosphorylation of Bcl-2 at serine 87 and promoted ULK1/Beclin 1-dependent autophagic membrane formation. Excessive mitochondrial fission by Drp1 enhanced the Rab9-dependent autophagosome recognition and engulfing of damaged mitochondria and eventually decreased cardiomyocyte viability. Therefore, these results demonstrated the connection between Rab9-dependent autophagosomes and mitochondrial fission in cardiac myocytes, which provides a potential therapeutic strategy for treating heart disease.


Assuntos
Dinaminas/metabolismo , MAP Quinases Reguladas por Sinal Extracelular/metabolismo , Insuficiência Cardíaca/metabolismo , Mitocôndrias Cardíacas/metabolismo , Receptor IGF Tipo 2/metabolismo , Análise de Variância , Animais , Autofagossomos/metabolismo , Autofagia , Linhagem Celular , Feminino , Sistema de Sinalização das MAP Quinases , Dinâmica Mitocondrial , Mitofagia , Miócitos Cardíacos/metabolismo , Fosforilação , Proteínas Proto-Oncogênicas c-bcl-2/metabolismo , Ratos , Ratos Sprague-Dawley , Proteínas rab de Ligação ao GTP/metabolismo
8.
J Cell Biochem ; 119(9): 7855-7864, 2018 09.
Artigo em Inglês | MEDLINE | ID: mdl-29932238

RESUMO

Aberrant expression of leucine zipper- and sterile ɑ motif-containing kinase (ZAK) observed in pathological human myocardial tissue is associated with the progression and elevation of hypertrophy. Our previous reports have correlated high levels of estrogen (E2) and abundant estrogen receptor (ER) α with a low incidence of pathological cardiac-hypertrophy and heart failure in the premenopause female population. However, the effect of elevated ERß expression is not well known yet. Therefore, in this study, we have analyzed the cardioprotective effects and mechanisms of E2 and/or ERß against ZAK overexpression-induced cellular hypertrophy. We have used transient transfection to overexpress ERß into the ZAK tet-on H9c2 cells that harbor the doxycycline-inducible ZAK plasmid. The results show that ZAK overexpression in H9c2 cells resulted in hypertrophic effects, which was correlated with the upregulation of p-JNK and p-p38 MAPKs and their downstream transcription factors c-Jun and GATA-4. However, ERß and E2 with ERß overexpressions totally suppressed the effects of ZAK overexpression and inhibited the levels of p-JNK, p-p38, c-Jun, and GATA-4 effectively. Our results further reveal that ERß directly binds with ZAK under normal conditions; however, ZAK overexpression reduced the association of ZAK-ERß. Interestingly, increase in ERß and E2 along with ERß overexpression both enhanced the binding strengths of ERß and ZAK and reduced the ZAK protein level. ERß overexpression also suppressed the E3 ligase-casitas B-lineage lymphoma (CBL) and attenuated CBL-phosphoinositide 3-kinase (PI3K) protein association to prevent PI3K protein degradation. Moreover, ERß and/or E2 blocked ZAK nuclear translocation via the inhibition of small ubiquitin-like modifier (SUMO)-1 modification. Taken together, our results further suggest that ERß overexpression strongly suppresses ZAK-induced cellular hypertrophy and myocardial damage.


Assuntos
Receptor beta de Estrogênio/genética , Mioblastos Cardíacos/citologia , Proteínas Quinases/metabolismo , Proteína SUMO-1/metabolismo , Animais , Crescimento Celular , Linhagem Celular , Receptor beta de Estrogênio/metabolismo , Estrogênios/farmacologia , Regulação da Expressão Gênica , Mioblastos Cardíacos/efeitos dos fármacos , Mioblastos Cardíacos/metabolismo , Fosfatidilinositol 3-Quinases/metabolismo , Proteínas Quinases/genética , Proteínas Proto-Oncogênicas c-cbl , Ratos
9.
Cell Physiol Biochem ; 48(5): 1942-1952, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-30092591

RESUMO

BACKGROUND/AIMS: High-fat diet (HFD)-induced nonalcoholic fatty liver disease (NAFLD) poses therapeutic challenges in elderly subjects. Due to lack of efficient drug therapy, plant-based bioactive peptides have been studied as alternative strategy in NAFLD and for less toxicity in elderly. To mimic fatty liver in aging conditions, researchers highly commended the genetically engineered strains SAMP8 (senescence-accelerated mice prone 8). However, there is a paucity of reports about the anti-steatosis effects of bioactive peptides against fatty liver development under a combined action of high-fat diet exposure and aging process. This study was conducted to evaluate the activity of DIKTNKPVIF peptide synthesized from alcalase-generated potato protein hydrolysate (PH), on reducing HFD-driven and steatosis-associated proinflammatory reaction in ageing model. METHODS: Five groups of six-month-old SAMP8 mice (n=4, each) were fed either a normal chow (NC group) for 14 weeks upon sacrifice, or induced with a 6-week HFD feeding, then treated without (HCO group) or with an 8-week simultaneous administration of peptide (HPEP group), protein (HPH group) or probucol (HRX group). Liver organs were harvested from each group for histological analysis and immunoblot assay. RESULTS: In contrast to NC, extensive fat accumulation was visualized in the liver slides of HCO. Following the trends of orally administered PH, intraperitoneally injected peptide reduces hepatic fat deposition and causes at protein level, a significant decrease in HFD-induced proinflammatory mediators p-p38 MAPK, FGF-2, TNF-α, IL-6 with concomitant reactivation of AMPK. However, p-Foxo1 and PPAR-α levels were slightly changed. CONCLUSION: Oral supplementation of PH and intraperitoneal injection of derived bioactive peptide alleviate proinflammatory reaction associated with hepatosteatosis development in elderly subjects, through activation of AMPK.


Assuntos
Envelhecimento , Dieta Hiperlipídica , Fígado/efeitos dos fármacos , Peptídeos/farmacologia , Proteínas Quinases Ativadas por AMP/metabolismo , Sequência de Aminoácidos , Animais , Proteína Forkhead Box O1/metabolismo , Gotículas Lipídicas/metabolismo , Fígado/metabolismo , Fígado/patologia , Metaloproteinase 2 da Matriz/metabolismo , Camundongos , Hepatopatia Gordurosa não Alcoólica/metabolismo , Hepatopatia Gordurosa não Alcoólica/patologia , Hepatopatia Gordurosa não Alcoólica/veterinária , PPAR alfa/metabolismo , Peptídeos/síntese química , Peptídeos/química , Probucol/farmacologia , Transdução de Sinais/efeitos dos fármacos , Fator de Necrose Tumoral alfa/metabolismo , Proteínas Quinases p38 Ativadas por Mitógeno/metabolismo
10.
Environ Toxicol ; 33(2): 220-233, 2018 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-29139225

RESUMO

Tea, the most widely consumed natural beverage has been associated with reduced mortality risk from cardiovascular disease. Oolong tea is a partially fermented tea containing high levels of catechins, their degree of oxidation varies between 20%-80% causing differences in their active metabolites. In this study we examined the effect of oolong tea extract (OTE) obtained by oxidation at low-temperature for short-time against hypoxic injury and found that oolong tea provides cyto-protective effects by suppressing the JNK mediated hypertrophic effects and by enhancing the innate antioxidant mechanisms in neonatal cardiomyocytes and in H9c2 cells. OTE effectively attenuates 24 h hypoxia-triggered cardiomyocyte loss by suppressing caspase-3-cleavage and apoptosis in a dose-dependent manner. OTE also enhances the IGFIR/p-Akt associated survival-mechanism involving the elevation of p-Badser136 in a dose-dependent manner to aid cellular adaptations against hypoxic challenge. The results show the effects and mechanism of Oolong tea to provide cardio-protective benefits during hypoxic conditions.


Assuntos
Apoptose/efeitos dos fármacos , Proteínas Quinases JNK Ativadas por Mitógeno/metabolismo , Fator 2 Relacionado a NF-E2/metabolismo , Extratos Vegetais/farmacologia , Proteínas Proto-Oncogênicas c-akt/metabolismo , Chá/química , Proteína de Morte Celular Associada a bcl/metabolismo , Animais , Antioxidantes/metabolismo , Caspase 3/metabolismo , Hipóxia Celular , Células Cultivadas , Hipertrofia/prevenção & controle , Proteínas Quinases JNK Ativadas por Mitógeno/antagonistas & inibidores , Proteínas Quinases JNK Ativadas por Mitógeno/genética , Proteína 1 Associada a ECH Semelhante a Kelch/metabolismo , Miócitos Cardíacos/citologia , Miócitos Cardíacos/efeitos dos fármacos , Miócitos Cardíacos/metabolismo , Fosforilação , Extratos Vegetais/química , Interferência de RNA , RNA Interferente Pequeno/metabolismo , Ratos , Receptores de Somatomedina/metabolismo , Chá/metabolismo
12.
Mol Cell Biochem ; 434(1-2): 181-195, 2017 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-28577190

RESUMO

The present study was aimed to investigate the protective effects of 17ß-estradiol (E2) and estrogen receptor α (ERα) on isoproterenol (ISO)-treated H9c2 cardiomyoblast cells. In the present study, we treated H9c2 cells with ISO, a ß-adrenergic receptor agonist, to induce myocardiac hypertrophy. Pre-administration of E2 or ERα (induced by doxycycline) and E2 plus ERα significantly prevented ISO-induced increase of cell size and cytosolic calcium accumulation, accompanied with increased mRNA of atrial natriuretic peptide and brain natriuretic peptide. However, ICI-ERs antagonist, and melatonin, a specific inhibitor for ERα, reversed the cardioprotective effects, suggesting that E2 action was mediated through ERα. Further evidences showed that E2 and ERα increased the protein level of GSK3ß and protein phosphatase 2a inhibitor 2 (I2-PP2A), which subsequently enhanced the activation of I2-PP2A by disrupting PP2A activity and maintains normal calcium outflow. Collectively, E2 and ERα inhibited hypertrophy by preventing cytosol calcium accumulation and by inhibiting the association between PP2A with Na+-Ca2+ exchanger via GSK3ß and I2-PP2A activation.


Assuntos
Agonistas Adrenérgicos beta/farmacologia , Fator Natriurético Atrial/metabolismo , Cálcio/metabolismo , Estradiol/fisiologia , Receptor alfa de Estrogênio/fisiologia , Glicogênio Sintase Quinase 3 beta/metabolismo , Isoproterenol/farmacologia , Fatores de Transcrição NFATC/metabolismo , Proteína Fosfatase 2/metabolismo , Animais , Linhagem Celular
13.
Environ Toxicol ; 32(12): 2471-2480, 2017 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-28856781

RESUMO

Anthocyanins are known cyto-protective agents against various stress conditions. In this study cardio-protective effect of anthocyanins from black rice against diabetic mellitus (DM) was evaluated using a streptozotocin (STZ)-induced DM rat model. Five-week-old male Wistar rats were administered with STZ (55 mg kg-1 , IP) to induce DM; rats in the treatment group received 250 mg oral anthocyanin/kg/day during the 4-week treatment period. DM and the control rats received normal saline through oral gavage. The results reveal that STZ-induced DM elevates myocardial apoptosis and associated proapoptotic proteins but down-regulates the proteins of IGF1R mediated survival signaling mechanism. Furthermore, the functional parameters such as the ejection-fraction and fraction-shortening in the DM rat hearts declined considerably. However, the rats treated with anthocyanins significantly reduced apoptosis and the associated proapoptotic proteins and further increased the survival signals to restore the cardiac functions in DM rats. Anthocyanin supplementation enhances cardiomyocyte survival and restores cardiac function.


Assuntos
Antocianinas/farmacologia , Cardiotônicos/farmacologia , Diabetes Mellitus Experimental/tratamento farmacológico , Coração/efeitos dos fármacos , Fosfatidilinositol 3-Quinases/metabolismo , Proteínas Proto-Oncogênicas c-akt/metabolismo , Receptor IGF Tipo 1/metabolismo , Estreptozocina , Animais , Antocianinas/uso terapêutico , Apoptose/efeitos dos fármacos , Cardiotônicos/uso terapêutico , Sobrevivência Celular/efeitos dos fármacos , Diabetes Mellitus Experimental/induzido quimicamente , Diabetes Mellitus Experimental/patologia , Diabetes Mellitus Experimental/fisiopatologia , Coração/fisiopatologia , Masculino , Miocárdio/patologia , Miócitos Cardíacos/efeitos dos fármacos , Miócitos Cardíacos/patologia , Ratos Wistar , Transdução de Sinais
14.
Environ Toxicol ; 32(3): 754-763, 2017 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-27098997

RESUMO

Severe and potentially fatal hypotension and cardiac contractile dysfunction are common symptoms in patients with sepsis. LPS was previously found to dramatically upregulate expression of fibrosis-related factors FGF-2, uPA, MMP-2, and MMP-9 in primary cardiac fibroblasts. MMPs are capable of denaturing and degrading fibrillar collagens and other components of the extracellular matrix (ECM). Studies have shown that dysregulation of expression of MMPs is associated with development of myocardial extracellular matrix remodeling and cardiac fibrosis, which contribute to progression of heart failure. In this study, H9c2 cells and cardiac fibroblasts were divided into five treatment groups: control, LPS (1 µg/mL) and three concentrations of FCEtOH (Carthami Flos ethanolic extract) (31.25, 62.5, and 125 µg/mL). Phosphorylation of ERK-1/2 was observed to be rapidly induced upon treatment with LPS. In contrast, it was significantly suppressed by the administration of FCEtOH (125 µg/mL). Effects of FCEtOH on LPS-induced MMP-2 and MMP-9 expression in H9c2 cells occurred directly through ERK1/2 were determined. H9c2 cells were therefore pretreated with EGF-R to activate ERK pathway. Both protein levels of MMP-2 and MMP-9 and immunefluorescent signals of MMP-9 were significantly enhanced by EGFR. In contrast, MMP-2 and MMP-9 were significantly reduced after FCEtOH administration. Based on these findings, the authors concluded that FCEtOH elicits a protective effect against LPS-induced cardio-fibrosis through the ERK1/2 pathway. Carthamus tinctorius L may potentially serve as a cardio-protective agent against LPS- induced cardiac fibrosis. © 2016 Wiley Periodicals, Inc. Environ Toxicol 32: 754-763, 2017.


Assuntos
Carthamus tinctorius/química , Lipopolissacarídeos/toxicidade , Sistema de Sinalização das MAP Quinases/efeitos dos fármacos , Extratos Vegetais/farmacologia , Regulação para Cima/efeitos dos fármacos , Animais , Carthamus tinctorius/metabolismo , Células Cultivadas , Regulação para Baixo/efeitos dos fármacos , Fator 2 de Crescimento de Fibroblastos/metabolismo , Humanos , Metaloproteinase 2 da Matriz/metabolismo , Metaloproteinase 9 da Matriz/metabolismo , Camundongos , Microscopia de Fluorescência , Proteína Quinase 1 Ativada por Mitógeno/metabolismo , Proteína Quinase 3 Ativada por Mitógeno/metabolismo , Miócitos Cardíacos/citologia , Miócitos Cardíacos/metabolismo , Fosforilação/efeitos dos fármacos , Extratos Vegetais/química , Ratos , Ratos Sprague-Dawley , Ativador de Plasminogênio Tipo Uroquinase/metabolismo
15.
Int J Med Sci ; 13(4): 277-85, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-27076784

RESUMO

High-fat diets induce obesity, leading to cardiomyocyte fibrosis and autophagy imbalance. In addition, no previous studies have indicated that probiotics have potential health effects associated with cardiac fibrosis and autophagy in obese rats. This study investigates the effects of probiotics on high-fat (HF) diet-induced obesity and cardiac fibrosis and autophagy in rat hearts. Eight-week-old male Wistar rats were separated randomly into five equally sized experimental groups: Normal diet (control) and high-fat (HF) diet groups and groups fed a high-fat diet supplemented with low (HL), medium (HM) or high (HH) doses of multi-strain probiotic powders. These experiments were designed for an 8-week trial period. The myocardial architecture of the left ventricle was evaluated using Masson's trichrome staining and immunohistochemistry staining. Key probiotics-related pathway molecules were analyzed using western blotting. Abnormal myocardial architecture and enlarged interstitial spaces were observed in HF hearts. These interstitial spaces were significantly decreased in groups provided with multi-strain probiotics compared with HF hearts. Western blot analysis demonstrated that key components of the TGF/MMP2/MMP9 fibrosis pathways and ERK5/uPA/ANP cardiac hypertrophy pathways were significantly suppressed in probiotic groups compared to the HF group. Autophagy balance is very important in cardiomyocytes. In this study, we observed that the beclin-1/LC3B/Atg7 autophagy pathway in HF was increased after probiotic supplementation was significantly decreased. Together, these results suggest that oral administration of probiotics may attenuate cardiomyocyte fibrosis and cardiac hypertrophy and the autophagy-signaling pathway in obese rats.


Assuntos
Cardiomegalia/dietoterapia , Cardiomiopatias/dietoterapia , Traumatismos Cardíacos/dietoterapia , Obesidade/dietoterapia , Probióticos/administração & dosagem , Animais , Autofagia/efeitos dos fármacos , Autofagia/genética , Cardiomegalia/fisiopatologia , Cardiomiopatias/fisiopatologia , Dieta Hiperlipídica/efeitos adversos , Traumatismos Cardíacos/fisiopatologia , Ventrículos do Coração/efeitos dos fármacos , Ventrículos do Coração/fisiopatologia , Humanos , Masculino , Miocárdio/metabolismo , Miocárdio/patologia , Miócitos Cardíacos/efeitos dos fármacos , Miócitos Cardíacos/patologia , Obesidade/fisiopatologia , Ratos , Ratos Wistar , Transdução de Sinais/efeitos dos fármacos
16.
Environ Toxicol ; 30(10): 1216-25, 2015 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-24706507

RESUMO

Exposure to tobacco smoke has epidemiologically been linked to the occurrence of cardiovascular disease among nonsmokers but the associated molecular events are not well elucidated yet. When Sprague Dawley rats were exposed to second-hand tobacco cigarette smoke twice a day for a 30 days period at an exposure rate of 10 cigarettes/30 min, they showed adverse effects including reduced left ventricle weight, increased cardiac damages, deteriorated cardiac features, and cardiac fibrosis. Exposure to second-hand smoking (SHS) increased the molecular markers of cardiac fibrosis such as urokinase plasminogen activator and matrix metallopeptidases. The modulations in the protein levels were led by the activation of extracellular signal-regulated kinases (ERK1/2), the transcription factor-specificity protein 1 (SP1), and the fibrogenic master switch-connective for epithelial-mesenchymal transition tissue growth factor there by indicating their effective role in SHS-induced myocardial infraction. Dilong, an edible earthworm extract used in Chinese medicine and its bioactive fibrinolytic enzyme product-lumbrokinase, when administered in rats, restricted the SHS exposure induced cardiac fibrosis and provided cardio-protection. The results show that lumbrokinase and dilong administration can efficiently prevent epidemiological incidence of cardiac disease among SHS-exposed nonsmokers.


Assuntos
Endopeptidases/farmacologia , Coração/efeitos dos fármacos , Miocárdio/patologia , Oligoquetos/enzimologia , Poluição por Fumaça de Tabaco/efeitos adversos , Animais , Cardiomiopatia Dilatada/etiologia , Cardiomiopatia Dilatada/prevenção & controle , Endopeptidases/isolamento & purificação , Fibrose , Metaloproteinases da Matriz/metabolismo , Proteína Quinase 1 Ativada por Mitógeno/metabolismo , Proteína Quinase 3 Ativada por Mitógeno/metabolismo , Miocárdio/metabolismo , Ratos , Ratos Sprague-Dawley , Transdução de Sinais/efeitos dos fármacos , Fator de Transcrição Sp1/metabolismo
17.
Chin J Physiol ; 58(3): 188-96, 2015 Jun 30.
Artigo em Inglês | MEDLINE | ID: mdl-26014124

RESUMO

Exposure to second-hand tobacco smoke (SHS) has been epidemiologically linked to heart disease among non-smokers. However, the molecular mechanism behind SHS-induced cardiac disease is not well known. This study found that SD rats exposed to cigarette smoke at a dose of 10 cigarettes for 30 min twice a day for 1 month had a reduced left ventricle-to-tibia length ratio (mg/mm), increased cardiomyocyte apoptosis by TUNEL assay and a wider interstitial space by H&E staining. However, lumbrokinase and dilong both reversed the effects of SHS. Western blotting demonstrated significantly increased expression of the pro-apoptotic protein caspase-3 in the hearts of the rats exposed to SHS. Elevated protein expression levels of Fas, FADD and the apoptotic initiator activated caspase-8, a molecule in the death-receptor-dependent pathway, coupled with increased t-Bid and apoptotic initiator activated caspase-9 were found. Molecules in the mitochondria-dependent pathway, which disrupts mitochondrial membrane potential, were also found in rats exposed to SHS. These factors indicate myocardial apoptosis. However, treatment with lumbrokinase and dilong inhibited SHS-induced apoptosis. Regarding regulation of the survival pathway, we found in western blot analysis that cardiac protein expression of pAkt, Bcl2, and Bcl-xL was significantly down-regulated in rats exposed to SHS. These effects were reversed with lumbrokinase and dilong treatment. The effects of SHS on cardiomyocytes were also found to be mediated by the Fas death receptor-dependent apoptotic pathway, an unbalanced mitochondria membrane potential and decreased survival signaling. However, treatment with both lumbrokinase and dilong inhibited the effects of SHS. Our data suggest that lumbrokinase and dilong may prevent heart disease in SHS-exposed non-smokers.


Assuntos
Apoptose/efeitos dos fármacos , Cardiotônicos/farmacologia , Endopeptidases/farmacologia , Medicina Tradicional Chinesa , Miócitos Cardíacos/efeitos dos fármacos , Oligoquetos , Transdução de Sinais/efeitos dos fármacos , Poluição por Fumaça de Tabaco/efeitos adversos , Animais , Caspase 3/metabolismo , Masculino , Miócitos Cardíacos/patologia , Ratos , Ratos Sprague-Dawley
18.
Cell Biochem Funct ; 30(5): 390-4, 2012 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-22411094

RESUMO

To investigate the changes of cardiomyocyte inflammation and fibrosis factors in heart of carotid artery balloon injury inflammatory rat model. Using rat carotid artery balloon injury model to detect left ventricular characteristics at 2 h, 2 days and 14 days after surgery using hematoxylin-eosin (H&E) gross stain, Masson's trichome stain and Western blot analysis for inflammatory and fibrosis-induced factors, tumour necrosis factor α (TNFα), JNK1, P38α, connective tissue growth factor (CTGF), SP1 and transforming growth factor ß (TGFß) protein expressions. The rat carotid arteries were injured after 2 h, 2 days and 14 days. Balloon-angioplasty to H&E stain results showed the increasing trend of left ventricular wall at 2 h and 2 days; then, the left ventricular wall became thinner, and the left ventricular chamber became enlarged and dilated after 14 days of carotid artery balloon injury. In addition, the Masson's trichome stain results showed that the left ventricular section has fibrosis-related blue staining (collagen) at 2 and 14 days after rat carotid artery balloon injury, and became even more severe at 14 days. Furthermore, we observed the protein expression level changs, which include TNFα, JNK1, P38α, CTGF, SP1 and TGFß using Western blotting assay. All proteins were induced at 2 h, 2 days and then reached the maximal level at 14 days. The vessel inflammation was associated with cardiac inflammatory and fibrosis effects during or after carotid artery balloon injury.


Assuntos
Angioplastia Coronária com Balão/efeitos adversos , Lesões das Artérias Carótidas/patologia , Modelos Animais de Doenças , Fibrose Endomiocárdica/patologia , Inflamação/patologia , Animais , Lesões das Artérias Carótidas/cirurgia , Fator de Crescimento do Tecido Conjuntivo/biossíntese , Fibrose Endomiocárdica/cirurgia , Hipertrofia Ventricular Esquerda/patologia , Masculino , Proteínas Quinases Ativadas por Mitógeno/biossíntese , Proteínas Quinases Ativadas por Mitógeno/imunologia , Ratos , Ratos Wistar , Transdução de Sinais , Fator de Crescimento Transformador beta/biossíntese , Fator de Necrose Tumoral alfa/biossíntese , Disfunção Ventricular Esquerda/patologia , Disfunção Ventricular Esquerda/cirurgia
19.
Chin J Physiol ; 55(1): 37-46, 2012 Feb 29.
Artigo em Inglês | MEDLINE | ID: mdl-22242953

RESUMO

Lactic acid bacteria (LAB) are microorganisms that benefit animals with allergic diseases and intestinal disorders such as inflammatory bowel disease. We propose that LAB can prevent cardiomyocytes inflammation and apoptosis in BALB/c mice using an ovalbumin (OVA)-induced allergy. Thirty-nine male BALB/c mice were divided into five groups: normal control, allergy control and three allergy groups each treated with Kefir I (Kefir I), Kefir II (Kefir II) or GM080 products (GM080). The myocardial architecture and apoptotic molecules in the excised left ventricle from these mice were investigated and post-treatment effects were evaluated. The inflammatory pathway, including toll-like receptor 4 (TLR4), phospholate-Jun-N-terminal kinase (p-JNK), JNK1/2 and tumor necrosis factor- alpha (TNF-α) and the mitochondria-dependent apoptosis phospholate-p38 (p-p38), Bcl-2 associated agonist of cell death (Bad), Bcl-2 associated X (Bax) and activated caspase 3, were found to be significant- ly increased in the hearts of allergy mice. The expression of phospholate-nuclear factor-κB (p-NFκB), TNF-α, p-p38 and Bad protein products were reduced or retarded in the Kefir I- or II-treated allergy group. The GM080-treated allergy group exhibited significantly lower p-JNK, JNK1/2, phospholate- Ikappa B (p-IκB), Bax and Bad protein products than the Kefir I and Kefir II allergy groups. These results indicate that LAB can reduce inflammation and prevent apoptosis of cardiomyocytes in the heart of OVA-induced allergy mice.


Assuntos
Hipersensibilidade/prevenção & controle , Lactobacillus , Miocardite/prevenção & controle , Miocárdio/metabolismo , Probióticos/uso terapêutico , Animais , Apoptose , Caspase 3/metabolismo , Citocromos c/metabolismo , Ventrículos do Coração/metabolismo , Ventrículos do Coração/patologia , Hipersensibilidade/complicações , Hipersensibilidade/metabolismo , Hipersensibilidade/patologia , Sistema de Sinalização das MAP Quinases , Masculino , Camundongos , Camundongos Endogâmicos BALB C , Mitocôndrias Cardíacas/metabolismo , Miocardite/induzido quimicamente , Miocardite/metabolismo , Miocardite/patologia , Miocárdio/patologia , Ovalbumina , Proteínas Proto-Oncogênicas c-bcl-2/metabolismo , Receptor 4 Toll-Like/metabolismo
20.
J Inflamm Res ; 15: 2983-2993, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35615105

RESUMO

Purpose: Depression and anxiety have been reported to increase the risk of infectious diseases and reactivation of latent infection. We conducted a nationwide population-based retrospective cohort study to determine the relationship between hepatitis B flares and depression or anxiety, utilizing outpatient and inpatient data from the Taiwan National Health Insurance Research database collected from 2000 to 2015. Patients and Methods: A total of 12,992 patients with chronic hepatitis B and newly diagnosed anxiety/depression, without advanced liver disease, were propensity score-matched for age, sex, and comorbidities in a 1:4 ratio to 51,968 controls with chronic hepatitis B without depression/anxiety or advanced liver disease. Both groups were followed-up until December 31, 2015. Cox proportional hazards regression was used to determine the risk factors for hepatitis B flares. The Log rank test and Kaplan-Meier analysis were performed to assess differences in the cumulative incidence of hepatitis B flares according to anxiety/depression status. Results: The incidence of hepatitis B flares was higher in the depression/anxiety cohort than in the control cohort (log-rank; p < 0.001). Patients with depression/anxiety had a significantly higher incidence rate of hepatitis B flares than those without depression/anxiety (3017 per 105 person-years versus 2042 per 105 person-years, p = 0.003). After adjusting for age and comorbidities, anxiety/depression was independently associated with an increased risk of hepatitis B flares (hazard ratio, 1.173; 95% confidence interval, 1.033-1.277; p = 0.003). Conclusion: This analysis suggests that in patients with chronic hepatitis B without advanced liver disease, those with concomitant depression or anxiety may be at higher risk of hepatitis B flares.

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