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1.
Artigo em Inglês | MEDLINE | ID: mdl-38797902

RESUMO

OBJECTIVE: There is a lack of evidence on the effectiveness of antidotes in the management of organophosphate and carbamate (OPC) poisoning. We aimed to review the efficacy and safety of glycopyrrolate in the management of OPC poisoning. METHODOLOGY: Databases such as PubMed, Scopus, Embase, and Cochrane Library were extensively searched from inception to November 2022 and updated till October 2023. Interventional, observational, and descriptive studies assessing the efficacy and safety of glycopyrrolate administered in any dose, route, and duration for the management of OPC poisoning published in the English language were considered for this review. The treatment with any other regimen that did not include glycopyrrolate was regarded as the comparator. The survival, intensive care unit (ICU) days and ventilatory outcomes were considered efficacy outcomes, and adverse effects were considered safety outcomes. Suitable quality assessment tools were used to assess the risk of bias in the included studies. Two independent reviewers were involved in the study selection, data extraction, and quality assessment and any discrepancies were resolved through mutual discussion or consultation with a third reviewer. RESULTS: A total of 9 studies (2 RCTs, 4 cohorts, 1 case series, and 2 case reports) out of 591 nonduplicate records were considered for this review. Overall, the RCTs were observed to have a moderate quality, and observational studies and descriptive studies were found to have good quality. All the included studies used atropine administration as a standard treatment option along with glycopyrrolate. The OPC patients treated with glycopyrrolate had a fewer hospitalization days with comparable recovery and ventilatory outcomes than those that had not been treated with glycopyrrolate. The occurrence of adverse events and complications was lower in the glycopyrrolate group than in the control group. CONCLUSION: Currently, there is a lack of comparative studies to recommend the use of glycopyrrolate in OPC poisoning, and further interventional studies are required to make an evidencebased recommendation on this topic.

2.
J Contemp Dent Pract ; 14(5): 848-51, 2013 Sep 01.
Artigo em Inglês | MEDLINE | ID: mdl-24685786

RESUMO

AIM: To evaluate and compare the effcacy of preprocedural mouthrinses (chlorhexidine digluconate and tea tree oil) in reducing microbial content of aerosol product during ultrasonic scaling procedures by viable bacterial count. SETTINGS AND DESIGN: It was a randomized single blind, placebo-controlled parallel group study. MATERIALS AND METHODS: Sixty subjects were randomly assigned to rinse 10 ml of any one of the mouthrinses (chlorhexidine digluconate or tea tree oil or distilled water). Ultrasonic scaling was done for a period of 10 minutes in presence of trypticase soy agar plates placed at standardized distance. Plates were then sent for microbiological evaluation for the aerosol produced. RESULTS: This study showed that all the antiseptic mouthwashes signifcantly reduced the bacterial colony forming units (CFUs) in aerosol samples. Chlorhexidine rinses were found to be superior to tea tree when used preprocedurally in reducing aerolized bacteria. CONCLUSION: This study advocates preprocedural dural rinsing with an effective antimicrobial mouthrinse during any dental treatment which generates aerosols, reduces the risk of cross-contamination with infectious agents in the dental operatory. CLINICAL SIGNIFICANCE: The aerolization of oral microbes occurring during dental procedures can potentially result in cross-contamination in the dental operatory and transmission of infectious agents to both dental professionals and patient. It is reasonable to assume therefore, that any stratagem for reducing the viable bacterial content of these aerosols could lower the risk of cross-contamination.


Assuntos
Microbiologia do Ar , Poluição do Ar em Ambientes Fechados/prevenção & controle , Anti-Infecciosos Locais/uso terapêutico , Carga Bacteriana/efeitos dos fármacos , Raspagem Dentária/métodos , Antissépticos Bucais/uso terapêutico , Adulto , Aerossóis , Poluentes Atmosféricos , Clorexidina/análogos & derivados , Clorexidina/uso terapêutico , Humanos , Controle de Infecções Dentárias/métodos , Viabilidade Microbiana/efeitos dos fármacos , Pessoa de Meia-Idade , Fitoterapia/métodos , Placebos , Método Simples-Cego , Óleo de Melaleuca/uso terapêutico , Resultado do Tratamento , Ultrassom
3.
Biochemistry ; 51(1): 205-13, 2012 Jan 10.
Artigo em Inglês | MEDLINE | ID: mdl-22166006

RESUMO

Urokinase-type plasminogen activator (uPA) is expressed by lung epithelial cells and regulates fibrin turnover and epithelial cell viability. PMA, LPS, and TNF-alpha, as well as uPA itself, induce uPA expression in lung epithelial cells. PMA, LPS, and TNF-alpha induce uPA expression through increased synthesis as well as stabilization of uPA mRNA, while uPA increases its own expression solely through uPA mRNA stabilization. The mechanism by which lung epithelial cells regulate uPA expression at the level of mRNA stability is unclear. To elucidate this process, we sought to characterize protein-uPA mRNA interactions that regulate uPA expression. Regulation of uPA at the level of mRNA stability involves the interaction of a ~40 kDa cytoplasmic-nuclear shuttling protein with a 66 nt uPA mRNA 3'UTR sequence. We purified the uPA mRNA 3'UTR binding protein and identified it as ribonucleotide reductase M2 (RRM2). We expressed recombinant RRM2 and confirmed its interaction with a specific 66 nt uPA 3'UTR sequence. Immunoprecipitation of cell lysates with anti-RRM2 antibody and RT-PCR for uPA mRNA confirmed that RRM2 binds to uPA mRNA. Treatment of Beas2B cells with uPA or LPS attenuated RRM2-endogenous uPA mRNA interactions, while overexpression of RRM2 inhibited uPA protein and mRNA expression through destabilization of uPA mRNA. LPS exposure of lung epithelial cells translocates RRM2 from the cytoplasm to the nucleus in a time-dependent manner, leading to stabilization of uPA mRNA. This newly recognized pathway could influence uPA expression and a broad range of uPA-dependent functions in lung epithelial cells in the context of lung inflammation and repair.


Assuntos
Pulmão/enzimologia , Processamento Pós-Transcricional do RNA/genética , Mucosa Respiratória/enzimologia , Ribonucleosídeo Difosfato Redutase/fisiologia , Ativador de Plasminogênio Tipo Uroquinase/biossíntese , Animais , Linhagem Celular , Células Cultivadas , Estabilidade Enzimática/efeitos dos fármacos , Estabilidade Enzimática/genética , Humanos , Lipopolissacarídeos/farmacologia , Pulmão/citologia , Pulmão/efeitos dos fármacos , Camundongos , Estabilidade de RNA/efeitos dos fármacos , Estabilidade de RNA/genética , Proteínas de Ligação a RNA/antagonistas & inibidores , Proteínas de Ligação a RNA/genética , Proteínas de Ligação a RNA/metabolismo , Proteínas Recombinantes/biossíntese , Proteínas Recombinantes/genética , Proteínas Recombinantes/farmacologia , Mucosa Respiratória/citologia , Mucosa Respiratória/efeitos dos fármacos , Ribonucleosídeo Difosfato Redutase/biossíntese , Ribonucleosídeo Difosfato Redutase/genética , Transdução de Sinais/efeitos dos fármacos , Transdução de Sinais/genética , Ativador de Plasminogênio Tipo Uroquinase/antagonistas & inibidores , Ativador de Plasminogênio Tipo Uroquinase/genética
4.
Am J Physiol Lung Cell Mol Physiol ; 302(5): L463-73, 2012 Mar 01.
Artigo em Inglês | MEDLINE | ID: mdl-22140072

RESUMO

Alveolar type II (ATII) cell apoptosis and depressed fibrinolysis that promotes alveolar fibrin deposition are associated with acute lung injury (ALI) and the development of pulmonary fibrosis (PF). We therefore sought to determine whether p53-mediated inhibition of urokinase-type plasminogen activator (uPA) and induction of plasminogen activator inhibitor-1 (PAI-1) contribute to ATII cell apoptosis that precedes the development of PF. We also sought to determine whether caveolin-1 scaffolding domain peptide (CSP) reverses these changes to protect against ALI and PF. Tissues as well as isolated ATII cells from the lungs of wild-type (WT) mice with BLM injury show increased apoptosis, p53, and PAI-1, and reciprocal suppression of uPA and uPA receptor (uPAR) protein expression. Treatment of WT mice with CSP reverses these effects and protects ATII cells against bleomycin (BLM)-induced apoptosis whereas CSP fails to attenuate ATII cell apoptosis or decrease p53 or PAI-1 in uPA-deficient mice. These mice demonstrate more severe PF. Thus p53 is increased and inhibits expression of uPA and uPAR while increasing PAI-1, changes that promote ATII cell apoptosis in mice with BLM-induced ALI. We show that CSP, an intervention targeting this pathway, protects the lung epithelium from apoptosis and prevents PF in BLM-induced lung injury via uPA-mediated inhibition of p53 and PAI-1.


Assuntos
Lesão Pulmonar Aguda/patologia , Apoptose/efeitos dos fármacos , Caveolina 1/farmacologia , Expressão Gênica , Fragmentos de Peptídeos/farmacologia , Alvéolos Pulmonares/patologia , Fibrose Pulmonar/patologia , Mucosa Respiratória/fisiopatologia , Lesão Pulmonar Aguda/induzido quimicamente , Lesão Pulmonar Aguda/prevenção & controle , Animais , Bleomicina , Caveolina 1/uso terapêutico , Células Cultivadas , Colágeno/metabolismo , Citoproteção , Humanos , Pulmão/metabolismo , Pulmão/patologia , Camundongos , Camundongos Endogâmicos C57BL , Camundongos Transgênicos , Fragmentos de Peptídeos/uso terapêutico , Inibidor 1 de Ativador de Plasminogênio/genética , Inibidor 1 de Ativador de Plasminogênio/metabolismo , Poli(ADP-Ribose) Polimerase-1 , Poli(ADP-Ribose) Polimerases/metabolismo , Alvéolos Pulmonares/metabolismo , Fibrose Pulmonar/induzido quimicamente , Fibrose Pulmonar/prevenção & controle , Receptores de Ativador de Plasminogênio Tipo Uroquinase/genética , Receptores de Ativador de Plasminogênio Tipo Uroquinase/metabolismo , Mucosa Respiratória/efeitos dos fármacos , Mucosa Respiratória/metabolismo , Proteína Supressora de Tumor p53/metabolismo , Ativador de Plasminogênio Tipo Uroquinase/genética , Ativador de Plasminogênio Tipo Uroquinase/metabolismo
5.
Diabetes Metab Syndr ; 16(3): 102427, 2022 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-35217468

RESUMO

BACKGROUND AND AIM: The importance of glucagon-like peptide-1 (GLP-1) agonists is increasing because of its blood sugar controlling and weight loss properties. The data regarding safety of GLP-1 agonists are limited. This study aims to review case reports and case series on adverse drug reactions (ADRs) of GLP-1 agonist. METHODOLOGY: A comprehensive search was performed in PubMed/Medline, Scopus and Embase to identify literatures. Bibliographic search and open search in Google, Google Scholar, SpringerLink and ResearchGate was performed to identify additional studies. Case reports and case series published the ADRs by the use of GLP-1 agonists in type 2 diabetes patients were included in the study. Reviews, experimental studies, observational studies, grey literature and non English studies were excluded. RESULTS: The study identified 120 cases of GLP-1 agonists associated ADRs (liraglutide - 46, exenatide - 46, dulaglutide - 20, semaglutide - 4, albiglutide - 2, lixisenatide - 2). The major ADRs reported was gastrointestinal disorders (n = 40) followed by renal (n = 23), dermatologic (n = 14), hepatic (n = 10), immunologic (n = 13), endocrine/metabolic (n = 7), hematologic (n = 3), angioedema (n = 3), neurologic (n = 2), cardiovascular (n = 2) and 1 from each of psychiatric, reproductive, generalized edema problems. CONCLUSION: Gastrointestinal problems, particularly pancreatitis was the more frequently reported adverse drug reaction associated with GLP-1 agonist. The most adverse drug reactions were observed with liraglutide and exenatide.


Assuntos
Diabetes Mellitus Tipo 2 , Efeitos Colaterais e Reações Adversas Relacionados a Medicamentos , Efeitos Colaterais e Reações Adversas Relacionados a Medicamentos/epidemiologia , Peptídeo 1 Semelhante ao Glucagon/efeitos adversos , Receptor do Peptídeo Semelhante ao Glucagon 1 , Humanos , Hipoglicemiantes/efeitos adversos , Liraglutida
6.
iScience ; 25(4): 104022, 2022 Apr 15.
Artigo em Inglês | MEDLINE | ID: mdl-35330685

RESUMO

Idiopathic pulmonary fibrosis (IPF) is a life-threatening disease resulting from dysregulated repair responses to lung injury. Excessive extracellular matrix deposition by expanding myofibroblasts and fibrotic lung fibroblasts (fLfs) has been implicated in the pathogenesis of PF, including IPF. We explored fLfs' microRNA-34a (miR-34a) expression from IPF tissues. Basal miR-34a levels were decreased with reduced binding of p53 to the promoter DNA and 3'UTR mRNA sequences. Overexpression of miR-34a in fLfs increased p53, PAI-1, and reduced pro-fibrogenic markers. The regulatory effects of miR-34a were altered by modifying the p53 expression. Precursor-miR-34a lung transduction reduced bleomycin-induced PF in wild-type mice. fLfs treated with caveolin-1 scaffolding domain peptide (CSP) or its fragment, CSP7, restored miR-34a, p53, and PAI-1. CSP/CSP7 reduced PDGFR-ß and pro-fibrogenic markers, which was abolished in fLfs following blockade of miR-34a expression. These peptides failed to resolve PF in mice lacking miR-34a in fLfs, indicating miR-34a-p53-feedback induction required for anti-fibrotic effects.

7.
Am J Respir Crit Care Med ; 181(12): 1355-66, 2010 Jun 15.
Artigo em Inglês | MEDLINE | ID: mdl-20194819

RESUMO

RATIONALE: Urokinase-type plasminogen activator (uPA) regulates extracellular proteolysis in lung injury and repair. Although alveolar expression of uPA increases, procoagulant activity predominates. OBJECTIVES: This study was designed to investigate whether uPA alters the expression of tissue factor (TF), the major initiator of the coagulation cascade, in lung epithelial cells (ECs). METHODS: Bronchial, primary airway ECs and C57B6 wild-type, uPA-deficient (uPA(-/-)) mice were exposed to phosphate-buffered saline, uPA, or LPS. Immunohistochemistry, protein, cellular, and molecular techniques were used to assess TF expression and activity. MEASUREMENTS AND MAIN RESULTS: uPA enhanced TF mRNA and protein expression, and TF-dependent coagulation in lung ECs. uPA-induced expression of TF involves both increased synthesis and enhanced stabilization of TF mRNA. uPA catalytic activity had little effect on induction of TF. By contrast, deletion of the uPA receptor binding growth factor domain from uPA markedly attenuated the induction of TF, suggesting that uPA receptor binding is sufficient for TF induction. Lung tissues of uPA-deficient mice expressed less TF protein and mRNA compared with wild-type mice. In addition, intratracheal instillation of mouse uPA increased TF mRNA and protein expression and accelerated coagulation in lung tissues. uPA(-/-) mice exposed to LPS failed to induce TF. CONCLUSIONS: uPA increased TF expression and TF-dependent coagulation in the lungs of mice. We hypothesize that uPA-mediated induction of TF occurs in lung ECs to promote increased fibrin deposition in the airways during acute lung injury.


Assuntos
Células Epiteliais/metabolismo , Pulmão/metabolismo , Tromboplastina/metabolismo , Ativador de Plasminogênio Tipo Uroquinase/metabolismo , Animais , Western Blotting/métodos , Técnicas de Cultura de Células , Fibrina/metabolismo , Humanos , Camundongos , Camundongos Endogâmicos C57BL , Camundongos Transgênicos , Ativação Transcricional
8.
Am J Respir Cell Mol Biol ; 43(3): 358-67, 2010 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-19855086

RESUMO

The plasminogen activator inhibitor type-1 (PAI-1) effectively blocks the activities of free and receptor-bound urokinase-type plasminogen activator. Incubation of cultured human pleural mesothelial (Met5A) cells with TGF-beta increased PAI-1 protein. TGF-beta, phorbol myristate acetate, and the translation inhibitor cycloheximide induced PAI-1 mRNA and slowed its degradation, suggesting that PAI-1 mRNA could be regulated by interaction of a PAI-1 binding protein (PAI-1 mRNABp) with PAI-1 mRNA. We found that an approximately 60 kD cytoplasmic PAI-1 mRNABp is detectable in cytoplasmic extracts of MeT5A human pleural mesothelial and malignant mesothelioma cells. The PAI-1 mRNABp specifically binds to a 33-nt sequence in the 3' untranslated region of PAI-1 mRNA. Insertion of this 33-nt sequence destabilizes otherwise stable beta-globin mRNA, indicating that the binding sequence accelerates decay of endogenous PAI-1 mRNA. Competitive inhibition by overexpression of the 33-nt binding sequence in MeT5A cells reduced PAI-1 mRNA decay and increased PAI-1 protein and mRNA expression, indicating that the PAI-1 mRNABp destabilizes PAI-1 mRNA by its interaction with the endogenous 33-nt binding sequence. Incubation of Met5A cells with TGF-beta attenuated the interaction of the PAI-1 mRNABp with the 33-nt sequence. By conventional and affinity purification, we isolated the PAI-1 mRNABp and confirmed its identity as 6-phospho-d-gluconate-NADP oxidoreductase, which specifically interacts with the full-length and the 33-nt sequence of the PAI-1 mRNA 3' untranslated region. This newly recognized pathway could influence expression of PAI-1 by mesothelial or mesothelioma cells at the level of mRNA stability in the context of pleural inflammation or malignancy.


Assuntos
Regulação da Expressão Gênica , Inibidor 1 de Ativador de Plasminogênio/genética , Pleura/metabolismo , Processamento Pós-Transcricional do RNA , RNA Mensageiro/metabolismo , Transcrição Gênica/genética , Northern Blotting , Western Blotting , Carcinógenos/farmacologia , Células Cultivadas , Cicloeximida/farmacologia , Epitélio/metabolismo , Humanos , Mesotelioma/genética , Mesotelioma/metabolismo , Inibidor 1 de Ativador de Plasminogênio/metabolismo , Pleura/citologia , Neoplasias Pleurais/genética , Neoplasias Pleurais/metabolismo , Inibidores da Síntese de Proteínas/farmacologia , Estabilidade de RNA , RNA Mensageiro/genética , Reação em Cadeia da Polimerase Via Transcriptase Reversa , Acetato de Tetradecanoilforbol/farmacologia , Fator de Crescimento Transformador beta/genética , Fator de Crescimento Transformador beta/metabolismo
9.
Mol Cell Biol ; 27(16): 5607-18, 2007 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-17548471

RESUMO

We found that p53-deficient (p53(-/-)) lung carcinoma (H1299) cells express robust levels of cell surface uPAR and uPAR mRNA. Expression of p53 protein in p53(-/-) cells suppressed basal and urokinase (uPA)-induced cell surface uPAR protein and increased uPAR mRNA degradation. Inhibition of p53 by RNA silencing in Beas2B human airway epithelial cells conversely increased basal as well as uPA-mediated uPAR expression and stabilized uPAR mRNA. Purified p53 protein specifically binds to the uPAR mRNA 3' untranslated region (3'UTR), and endogenous uPAR mRNA associates with p53. The p53 binding region involves a 37-nucleotide uPAR 3'UTR sequence, and insertion of the p53 binding sequence into beta-globin mRNA destabilized beta-globin mRNA. Inhibition of p53 expression in these cells reverses decay of chimeric beta-globin-uPAR mRNA. These observations demonstrate a novel regulatory role for p53 as a uPAR mRNA binding protein that down-regulates uPAR expression, destabilizes uPAR mRNA, and thereby contributes to the viability of human airway epithelial or lung carcinoma cells.


Assuntos
Estabilidade de RNA , Receptores de Superfície Celular/genética , Proteína Supressora de Tumor p53/metabolismo , Regiões 3' não Traduzidas/metabolismo , Sequência de Bases , Linhagem Celular Tumoral , Proliferação de Células , Sobrevivência Celular , Células Epiteliais/metabolismo , Regulação Neoplásica da Expressão Gênica , Humanos , Neoplasias Pulmonares/genética , Dados de Sequência Molecular , Ligação Proteica , RNA Mensageiro/biossíntese , RNA Mensageiro/genética , Proteínas de Ligação a RNA/metabolismo , Receptores de Superfície Celular/metabolismo , Receptores de Ativador de Plasminogênio Tipo Uroquinase , Proteína Supressora de Tumor p53/deficiência
10.
Am J Respir Crit Care Med ; 179(4): 288-98, 2009 Feb 15.
Artigo em Inglês | MEDLINE | ID: mdl-19029002

RESUMO

RATIONALE: Urokinase-type plasminogen activator (uPA) receptor (uPAR) is required for the recruitment of neutrophils in response to infection. uPA induces its own expression in lung epithelial cells, which involves its interaction with cell surface uPAR. Regulation of uPAR expression is therefore crucial for uPA-mediated signaling in infectious acute lung injury (ALI). OBJECTIVES: To determine the role of uPA in uPAR expression during ALI caused by sepsis. METHODS: We used Western blot, Northern blot, Northwestern assay, and immunohistochemistry. Phosphate-buffered saline- and lipopolysaccharide (LPS)-treated wild-type and uPA(-/-) mice were used. MEASUREMENTS AND MAIN RESULTS: Biological activities of uPA, including proteolysis, cell adhesion, migration, proliferation, and differentiation, are dependent on its association with uPAR. Bacterial endotoxin (LPS) is a major cause of pulmonary dysfunction and infection-associated mortality. The present study shows that LPS induces uPAR expression both in vitro and in vivo, and that the mechanism involves post-transcriptional stabilization of uPAR mRNA by reciprocal interaction of phosphoglycerate kinase (PGK) and heterogeneous nuclear ribonucleoprotein C (hnRNPC) with uPAR mRNA coding region and 3' untranslated region determinants, respectively. The process involves tyrosine phosphorylation of PGK and hnRNPC. uPA(-/-) mice failed to induce uPAR expression after LPS treatment. In these mice, LPS treatment failed to alter the binding of PGK and hnRNPC protein with uPAR mRNA due to lack of tyrosine phosphorylation. CONCLUSIONS: Our study shows that induction of LPS-mediated uPAR expression is mediated through tyrosine phosphorylation of PGK and hnRNPC. This involves expression of uPA as an obligate intermediary.


Assuntos
Lesão Pulmonar Aguda/genética , Expressão Gênica/genética , Lipopolissacarídeos , Processamento de Proteína Pós-Traducional/genética , Receptores de Ativador de Plasminogênio Tipo Uroquinase/genética , Lesão Pulmonar Aguda/induzido quimicamente , Animais , Técnicas de Cultura de Células , Modelos Animais de Doenças , Regulação da Expressão Gênica/genética , Humanos , Immunoblotting/métodos , Camundongos , Camundongos Transgênicos , Fosfoglicerato Quinase/metabolismo , RNA Mensageiro/genética , Mucosa Respiratória/enzimologia , Tirosina/metabolismo
11.
JCI Insight ; 5(19)2020 10 02.
Artigo em Inglês | MEDLINE | ID: mdl-32841217

RESUMO

Increased metabolism distinguishes myofibroblasts or fibrotic lung fibroblasts (fLfs) from the normal lung fibroblasts (nLfs). The mechanism of metabolic activation in fLfs has not been fully elucidated. Furthermore, the antifibrogenic effects of caveolin-1 scaffolding domain peptide CSP/CSP7 involving metabolic reprogramming in fLfs are unclear. We therefore analyzed lactate and succinate levels, as well as the expression of glycolytic enzymes and hypoxia inducible factor-1α (HIF-1α). Lactate and succinate levels, as well as the basal expression of glycolytic enzymes and HIF-1α, were increased in fLfs. These changes were reversed following restoration of p53 or its transcriptional target microRNA-34a (miR-34a) expression in fLfs. Conversely, inhibition of basal p53 or miR-34a increased glucose metabolism, glycolytic enzymes, and HIF-1α in nLfs. Treatment of fLfs or mice having bleomycin- or Ad-TGF-ß1-induced lung fibrosis with CSP/CSP7 reduced the expression of glycolytic enzymes and HIF-1α. Furthermore, inhibition of p53 or miR-34a abrogated CSP/CSP7-mediated restoration of glycolytic flux in fLfs in vitro and in mice with pulmonary fibrosis and lacking p53 or miR-34a expression in fibroblasts in vivo. Our data indicate that dysregulation of glucose metabolism in fLfs is causally linked to loss of basal expression of p53 and miR-34a. Treatment with CSP/CSP7 constrains aberrant glucose metabolism through restoration of p53 and miR-34a.


Assuntos
Caveolina 1/farmacologia , Regulação da Expressão Gênica/efeitos dos fármacos , Glucose/metabolismo , MicroRNAs/metabolismo , Fragmentos de Peptídeos/farmacologia , Fibrose Pulmonar/prevenção & controle , Fator de Crescimento Transformador beta1/metabolismo , Proteína Supressora de Tumor p53/metabolismo , Animais , Caveolina 1/fisiologia , Feminino , Glicólise , Humanos , Masculino , Camundongos , Camundongos Endogâmicos C57BL , Camundongos Knockout , MicroRNAs/genética , Fragmentos de Peptídeos/fisiologia , Fibrose Pulmonar/induzido quimicamente , Fibrose Pulmonar/metabolismo , Fibrose Pulmonar/patologia , Fator de Crescimento Transformador beta1/genética , Proteína Supressora de Tumor p53/genética
12.
Toxicol Lett ; 335: 11-27, 2020 Dec 15.
Artigo em Inglês | MEDLINE | ID: mdl-32949623

RESUMO

Lead is a toxin of great public health concern affecting the young and aging population. Several factors such as age, gender, lifestyle, dose, and genetic makeup result in interindividual variations to lead toxicity mainly due to variations in metabolic consequences. Hence, the present study aimed to examine dose-dependent lead-induced systemic changes in metabolism using rat model by administering specific doses of lead such as 10 (low lead; L-Pb), 50 (moderate lead; M-Pb), and 100 mg/kg (high lead; H-Pb) body weight for a period of one month. Biochemical and haematological analysis revealed that H-Pb was associated with low body weight and feed efficiency, low total protein levels (p ≤ 0.05), high blood lead (Pb-B) levels (p ≤ 0.001), low ALAD (δ-aminolevulinate dehydratase) activity (p ≤ 0.0001), high creatinine (p ≤ 0.0001) and blood urea nitrogen (BUN) (p ≤ 0.01) levels, elevated RBC and WBC counts, reduced haemoglobin and blood cell indices compared to control. Spatial learning and memory test revealed that H-Pb exposed animals presented high latency to the target quadrant and escape platform compared to other groups indicating H-Pb alters cognition function in rats. Histopathological changes were observed in liver and kidney as they are the main target organs of lead toxicity. LC-MS analysis further revealed that Butyryl-L-carnitine (p ≤ 0.01) and Ganglioside GD2 (d18:0/20:0) (p ≤ 0.05) levels were significantly reduced in H-Pb group compared to all groups. Further, pathway enrichment analysis revealed abundance and significantly modulated metabolites associated with oxidative stress pathways. The present study is the first in vivo model of dose-dependent lead exposure for serum metabolite profiling.


Assuntos
Rim/efeitos dos fármacos , Intoxicação por Chumbo/metabolismo , Chumbo/toxicidade , Fígado/efeitos dos fármacos , Nitratos/toxicidade , Animais , Peso Corporal/efeitos dos fármacos , Relação Dose-Resposta a Droga , Rim/metabolismo , Rim/patologia , Chumbo/sangue , Intoxicação por Chumbo/sangue , Intoxicação por Chumbo/fisiopatologia , Fígado/metabolismo , Fígado/patologia , Masculino , Aprendizagem em Labirinto/efeitos dos fármacos , Memória/efeitos dos fármacos , Metabolômica , Nitratos/sangue , Tamanho do Órgão/efeitos dos fármacos , Estresse Oxidativo/efeitos dos fármacos , Ratos , Ratos Wistar
13.
J Clin Med ; 8(1)2019 Jan 12.
Artigo em Inglês | MEDLINE | ID: mdl-30642058

RESUMO

Antimicrobial resistance (AMR) is a recognized public health threat today globally. Although many active and passive stewardship strategies are advocated to counter AMR clinically, educating school going children on AMR could be a cost-effective measure to minimize AMR development in the future. We implemented NICE's e-bug as a module to educate class VII school students on AMR determinants. A prospective quasi-experimental study on 327 students from nine different schools of class VII around Manipal town, Udupi district, Karnataka state, India were included in the study. Ten questions on AMR determinants from the e-bug program were used in written pre-test. After an education intervention, a post-test was conducted. Descriptive statistics to estimate epidemiological characteristics, Wilcoxon Signed Ranks and Kruskal⁻Wallis tests were applied to analyze statistical significance of pre/post-test performance scores and between schools. Students had inadequate knowledge on seven AMR determinants (antimicrobial indication, its course, hand hygiene, fermentation, spread of infection, microbial multiplication and characteristics of microbe) as analyzed from the post-test performance (p < 0.05). Comparison of post-test performance between schools showed significant improvement in scores (p < 0.05) for three questions (definition on antimicrobial, cover while cough/sneezing and microbial characteristics). Although students exhibited sub-optimal knowledge on some AMR determinants, they showed keenness to learn, which was evident by their post-test performance. Our findings and previous similar studies from Europe are suggestive of early pedagogic interventions on AMR through inclusion of such education modules in the regular school curriculum could be a potential tool for AMR prevention.

14.
Am J Respir Cell Mol Biol ; 39(3): 364-72, 2008 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-18390474

RESUMO

Lung carcinoma (H1299) cells deficient in p53 (p53(-/-)) express large amounts of urokinase-type plasminogen activator (uPA) protein and uPA mRNA, and exhibit slower degradation of uPA mRNA than that of p53-expressing nonmalignant Beas2B human airway epithelial cells. Expression of p53 protein in H1299 cells, upon transfection with p53 cDNA, suppressed basal as well as uPA-induced expression of uPA protein in both conditioned media and cell lysates, and decreased the level of steady-state uPA mRNA primarily due to increased uPA mRNA turnover. Inhibition of p53 expression by RNA silencing (SiRNA) in Beas2B cells enhanced basal and uPA-mediated uPA protein and mRNA expression with stabilization of uPA mRNA. Purified p53 binds to the uPA mRNA 3' untranslated region (UTR) in a sequence-specific manner and endogenous uPA mRNA associates with p53 protein isolated from Beas2B cytosolic extracts. p53 binds to a 35-nucleotide uPA 3'UTR sequence and insertion of this sequence into beta-globin mRNA accelerates degradation of otherwise stable beta-globin mRNA. These observations confirm a new role for p53 as a uPA mRNA binding protein that down-regulates uPA mRNA stability and decreases cellular uPA expression.


Assuntos
Estabilidade de RNA , RNA Mensageiro/metabolismo , Proteína Supressora de Tumor p53/metabolismo , Ativador de Plasminogênio Tipo Uroquinase/antagonistas & inibidores , Ativador de Plasminogênio Tipo Uroquinase/biossíntese , Regiões 3' não Traduzidas , Sequência de Bases , Northern Blotting , Linhagem Celular Tumoral , DNA Complementar , Eletroforese em Gel de Poliacrilamida , Inativação Gênica , Globinas/genética , Humanos , RNA Mensageiro/genética , Proteína Supressora de Tumor p53/antagonistas & inibidores , Proteína Supressora de Tumor p53/genética
15.
J Cutan Aesthet Surg ; 11(2): 47-50, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-30210205

RESUMO

Dynamics of the facial aesthetics is changing rapidly as we treat more and more faces. Our understanding of the molecule at hand and its various applications only expands as our learnings progress. Perception and expectation of the end goal to beauty itself are evolving, and therefore newer ways of analyzing, understanding, and delivering of any aesthetic drug have to evolve continuously. Botulinum toxin is one of the wonders in the aesthetic world, which led the entire focus of the medical fraternity into nonsurgical facial aesthetics. Botulinum toxin was and is still the best tool for relaxing lateral canthal lines and glabellar frown lines. However, it has evolved further to now impart changes/enhancements in skin texture and luminosity, enhancement in facial shape, and reduction in glandular activity of sebaceous, sweat, and salivary glands, therefore leading to a lot more aesthetic application while it still remains as the line eraser.

16.
J Indian Soc Pedod Prev Dent ; 35(2): 162-166, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-28492196

RESUMO

AIM: Dental caries is a multifactorial disease which has a deleterious effect on the oral cavity. Improper oral hygiene habits are a cause for the same. The aim of this study was to compare the antibacterial efficacy of Munident, an Ayurvedic (herbal) dentifrice with commercially available toothpaste. MATERIALS AND METHODS: A total of forty subjects between the age group 9 and 12 years, resident of Bala Yeshu Nilaya Bhavan, Mangalore, Karnataka, India, were chosen for our study. They were divided into two groups containing twenty subjects in each; Group 1 for standard toothpaste and Group 2 for Munident. The decayed, missing, and filled teeth scores were noted from each subject. Group 1 was instructed to brush the teeth using commercially available toothpaste and Group 2 was instructed to brush using commercially available Munident (herbal) dentifrice. Both the groups brushed the teeth using soft variety of tooth brush. The gingival bleeding index and salivary Streptococcus mutans count were noted pre- and post-brushimg for both groups. The results obtained were subjected to statistical analysis. RESULTS: Munident (herbal) dentifrice showed better efficacy in comparison to toothpaste in terms of gingival bleeding index and salivary S. mutans count. CONCLUSION: Munident (herbal) dentifrice has better gingival bleeding index compared to standard formulation of toothpaste. Hence, the practice of using herbal dentifrice should be encouraged.


Assuntos
Cárie Dentária/prevenção & controle , Ayurveda , Extratos Vegetais/uso terapêutico , Streptococcus mutans/isolamento & purificação , Cremes Dentais/uso terapêutico , Criança , Índice CPO , Feminino , Gengiva/patologia , Humanos , Masculino , Saliva/microbiologia , Streptococcus mutans/efeitos dos fármacos , Escovação Dentária/métodos
17.
Plast Reconstr Surg Glob Open ; 5(12): e1574, 2017 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-29632761

RESUMO

BACKGROUND: Indians constitute one of the largest population groups in the world. Facial anthropometry, morphology, and age-related changes in Indians differ from those of other ethnic groups, necessitating a good understanding of their facial structure and the required aesthetic treatment strategies. However, published recommendations specific to Indians are few, particularly regarding combination treatment. METHODS: The Indian Facial Aesthetics Expert Group (19 dermatologists, plastic surgeons, and aesthetic physicians with a mean 15.5 years' aesthetic treatment experience) met to develop consensus recommendations for the cosmetic facial use of botulinum toxin and hyaluronic acid fillers, alone and in combination, in Indians. Treatment strategies and dosage recommendations (agreed by ≥ 75% of the group) were based on results of a premeeting survey, peer-reviewed literature, and the experts' clinical experience. RESULTS: The need for combination treatment increases with age. Tear trough deficiency is the most common midface indication in Indian women aged 20-40 years. In older women, malar volume loss and jowls are the most common aesthetic concerns. Excess medial soft tissue on a relatively smaller midface precedes age-related sagging. Hence, in older Indians, fillers should be used peripherally to achieve lift and conservatively in the medial zones to avoid adding bulk medially. The shorter, wider lower face requires 3-dimensional correction, including chin augmentation, to achieve increased facial height and the oval shape desired by most Indian women. CONCLUSIONS: These recommendations give physicians treating Indians worldwide a better understanding of their unique facial characteristics and provide treatment strategies to achieve optimal aesthetic outcomes.

18.
J Cutan Aesthet Surg ; 8(3): 169-72, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-26644742

RESUMO

INTRODUCTION: An oval face, pronounced cheek bones, a defined jaw line and a smooth Ogee curve are global aesthetic beauty goals. Though criteria are similar the Indian face poses some unique challenges because of the innate differences in skeletal shape, size, and soft tissue disposition. Width of the malar prominences and mandibular angles along with height are smaller compared to the other Asian and Caucasian populations along with a much heavier soft tissue disposition. This creates unique deficits and places unique demands on aesthetic intervention. OBJECTIVES: The evolution of practice patterns has lead to a variety of newer approaches; however, it is still common to target the nasolabial and mid-face volumizing as basic intervention for facial beautifying and rejuvenation. As aging progresses, Indian faces tend to get fuller and the tissue then descends downwards similar to other ethnic groups albeit more aggressive due to higher volumes of facial fat pad and smaller bone framework. Any excess correction in the inner circle zones will further add to the bulk along with cumulative remnants of previously administered fillers. METHODS: In a younger face when the goal is beautification the attempt is to address the specific structural deficit on the outer bony framework along with the chin. This enhances the appearance immediately as well as holds up the tissue descent as they age. When the goal is youthful transition of an aging face, then again the bony changes further enhance the deficit in framework and the loss of fat pads along the periphery that is lateral forehead, temples and lateral cheek. Fat pad correction will give the most natural and best results as against working on the anterior mid cheek, nasolabials and angle of the mouth in a soft tissue heavy center zone of the face. Botulinum toxin and hyaluronic acid (HA) fillers remain the most popular facial injectables used for facial rejuvenation and structural enhancement. RESULTS: Naturally enhanced faces, and gracefully addressed aging changes are important. Fillers administered on the outer zones of the face rather than the inner zone gives better aesthetic results.

19.
Dent Update ; 31(7): 398-402, 2004 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-15485121

RESUMO

Dentigerous cysts develop from unerupted and impacted permanent teeth. Very rarely, supernumerary teeth are associated with dentigerous cysts and constitute about 5-6% of all dentigerous cysts. Although these cysts are not common in the first decade of life, regular thorough inspection of radiographs is of importance, as indicated by this case report. This case shows how an impacted supernumerary canine developed a dentigerous cyst, engulfing the whole of the maxillary antrum.


Assuntos
Cisto Dentígero/diagnóstico por imagem , Dente Supranumerário/diagnóstico por imagem , Criança , Cisto Dentígero/etiologia , Humanos , Masculino , Seio Maxilar/diagnóstico por imagem , Radiografia , Dente Impactado/diagnóstico por imagem , Dente Supranumerário/complicações
20.
J Cosmet Dermatol ; 13(1): 79-84, 2014 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-24641610

RESUMO

The use of fillers in esthetic rejuvenation or reshaping has been well established and is one of toughest techniques for beginners due to segmental attachments and proximity to important anatomical structures in the infraorbital area making it difficult to achieve smooth esthetic results. To make filling easy, smooth, and repeatable, anatomical points were marked through specific surface measurements. Patients were injected with 0.5-1 mL of hyaluronic acid filler using the identified anatomical point. All patients treated have achieved restoration of the ogee curve with no bruising and minimal downtime with results lasting for 12-36 months. The results of the study suggest the use of single repeatable injection at the crucial point and if required at multiple identified anatomical points along the ligamental attachment to satisfy the esthetic outcome of the patient. Injection of filler at infraorbital points could instantly lift the face up, elevating the point of shadow and shifting the point of highest light reflection to the ideal malar point.


Assuntos
Pontos de Referência Anatômicos , Técnicas Cosméticas , Fármacos Dermatológicos/administração & dosagem , Ácido Hialurônico/administração & dosagem , Rejuvenescimento , Envelhecimento da Pele/efeitos dos fármacos , Adulto , Estética , Olho , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos
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