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1.
Molecules ; 26(16)2021 Aug 10.
Artigo em Inglês | MEDLINE | ID: mdl-34443423

RESUMO

Chronic liver inflammation has become a major global health concern. In the absence of clinical surrogate markers to diagnose inflammatory liver disease, the intervention with effective drugs in modern medicine tends to be late. In Sri Lanka, traditional medical practitioners prescribe herbal preparations from Osbeckia octandra for the prevention and treatment of liver disorders. To test the efficacy of such treatments, we have administered thioacetamide (TAA) to male Wistar rats to induce chronic liver damage (disease control; DC) and examined how various leaf extracts: crude leaf suspension (CLS), boiled leaf extract (BLE), sonicated leaf extract (SLE), methanol leaf extract (MLE) and hexane leaf extract (HLE) of O. octandra ameliorate TAA-induced liver disease. The CLS, BLE and SLE treatments in cirrhotic rats significantly attenuated disease-related changes, such as liver weight and hepato-enzymes. The mRNA levels of Tnf-α were significantly decreased by 3.6, 10 and 3.9 times in CLS, BLE and SLE compared to DC. The same treatments resulted in significantly lower (19.5, 4.2 and 2.4 times) α-Sma levels compared to DC. In addition, Tgf-ß1 and Vegf-R2 mRNA expressions were significantly lower with the treatments. Moreover, BLE expressed a strong anti-angiogenic effect. We conclude that CLS, BLE and SLE from O. octandra have potent hepatic anti-fibrotic effects in TAA-induced liver cirrhosis.


Assuntos
Cirrose Hepática Experimental/tratamento farmacológico , Melastomataceae/química , Neovascularização Patológica/tratamento farmacológico , Extratos Vegetais/uso terapêutico , Folhas de Planta/química , Citocinas/genética , Citocinas/metabolismo , Células Endoteliais da Veia Umbilical Humana/efeitos dos fármacos , Células Endoteliais da Veia Umbilical Humana/metabolismo , Humanos , Mediadores da Inflamação/metabolismo , Fígado/enzimologia , Fígado/patologia , Cirrose Hepática Experimental/sangue , Neovascularização Patológica/sangue , Tamanho do Órgão/efeitos dos fármacos , Extratos Vegetais/farmacologia , RNA Mensageiro/genética , RNA Mensageiro/metabolismo , Tioacetamida , Regulação para Cima/efeitos dos fármacos , Água , Perda de Peso/efeitos dos fármacos
2.
Int J Mol Sci ; 21(17)2020 Aug 26.
Artigo em Inglês | MEDLINE | ID: mdl-32859045

RESUMO

Post-implantation cell survival and angio-/vasculogenesis are critical for the success of cell-based regenerative strategies. The current study aimed to overexpress B-cell lymphoma 2 (Bcl-2) gene in dental pulp stem cells (DPSCs) and examine the anti-apoptotic and angio-/vasculogenic effects both in-vitro and in-vivo. DPSCs were transduced with Bcl-2-green fluorescent protein (GFP) lentiviral particles and examined for cell proliferation and apoptosis. The cells were cultured under normoxic or hypoxic (0.5 mM CoCl2) conditions and examined for the expression of angiogenic factors and effects on endothelial cell proliferation, migration and vessel morphogenesis. Cells with or without hypoxic preconditioning were used in in-vivo Matrigel plug assay to study the post-implantation cell survival and angio-/vasculogenesis. Bcl-2-overexpressing-DPSCs showed significantly lower apoptosis than that of null-GFP-DPSCs under serum-free conditions. Under hypoxia, Bcl-2-overexpressing-DPSCs expressed significantly higher levels of vascular endothelial growth factor compared to that under normoxia and null-GFP-DPSCs. Consequently, Bcl-2-overexpressing-DPSCs significantly enhanced endothelial cell proliferation, migration and vascular tube formation on Matrigel. Immunohistological assessment of in-vivo transplanted Matrigel plugs showed significantly higher cell survival and vasculature in hypoxic preconditioned Bcl-2-overexpressing-DPSC group compared to null-GFP-DPSC group. In conclusion, Bcl-2 overexpression and hypoxic-preconditioning could be synergistically used to enhance post-implantation cell survival and angio-/vasculogenic properties of DPSCs.


Assuntos
Polpa Dentária/citologia , Subunidade alfa do Fator 1 Induzível por Hipóxia/genética , Proteínas Proto-Oncogênicas c-bcl-2/genética , Transdução Genética/métodos , Fator A de Crescimento do Endotélio Vascular/genética , Animais , Diferenciação Celular , Hipóxia Celular , Proliferação de Células , Sobrevivência Celular , Células Cultivadas , Polpa Dentária/metabolismo , Células Endoteliais da Veia Umbilical Humana , Humanos , Lentivirus/genética , Camundongos , Transplante de Células-Tronco , Células-Tronco/citologia , Células-Tronco/metabolismo
3.
Dent Traumatol ; 29(1): 59-65, 2013 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-22487464

RESUMO

BACKGROUND: Hank's balanced salt solution (HBSS) and milk have gained wide acceptance as storage media for avulsed tooth. However, the effect of the media and storage time on the periodontal ligament (PDL) cells involvement in the development of root resorption is still unclear. The purpose of this study was to evaluate whether precultured PDL cells in HBSS, milk, or modified Eagle's medium alpha (α-MEM) would affect osteoclastogenesis. MATERIALS AND METHODS: PDL cells were precultured in HBSS, milk, or α-MEM for 1 h or 6 h before being co-cultured with RAW 264.7 cells for an additional 3 days for mRNA analysis and 11 days for osteoclastogenesis assay. RESULTS: Cyclooxygenase-2 (COX-2) mRNA was detected immediately in PDL cells precultured in the three storage media. The expression was up-regulated markedly in all co-cultures when compared with RAW cells alone. As a result of the co-culture, interleukin-1ß (IL-1ß) expression was detectable in both PDL and RAW cells. TRAP+ multinucleated, osteoclast-like cells developed in all co-cultures; the number of TRAP+ cells was highest (P < 0.05) in the co-cultures that PDL cells precultured in milk for 6 h. The mRNA level of receptor activator of nuclear factor-kappa B ligand (RANKL) was not detected in PDL cells. Osteoprotegerin (OPG) mRNA expression reduced with increased preculture time, but the difference was not significant (P > 0.05). CONCLUSIONS: PDL cells kept in the three storage media led to TRAP+ multinucleated, osteoclast-like cells formation via RANKL-independent signaling. The ability to induce osteoclastogenesis may be considered as one of the factors to evaluate the ability of storage medium to maintain PDL viability after tooth avulsion.


Assuntos
Soluções para Preservação de Órgãos/farmacologia , Osteoclastos/efeitos dos fármacos , Ligamento Periodontal/citologia , Ligante RANK/efeitos dos fármacos , Fosfatase Ácida/análise , Animais , Técnicas de Cultura de Células , Diferenciação Celular/efeitos dos fármacos , Linhagem Celular , Sobrevivência Celular/efeitos dos fármacos , Técnicas de Cocultura , Meios de Cultura , Ciclo-Oxigenase 2/análise , Humanos , Interleucina-1beta/análise , Isoenzimas/análise , Soluções Isotônicas/farmacologia , Macrófagos/efeitos dos fármacos , Camundongos , Leite/fisiologia , Compostos Orgânicos/farmacologia , Osteoprotegerina/análise , Ligamento Periodontal/efeitos dos fármacos , Transdução de Sinais/efeitos dos fármacos , Fosfatase Ácida Resistente a Tartarato , Preservação de Tecido/métodos
4.
Int J Paediatr Dent ; 21(1): 23-8, 2011 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-20659182

RESUMO

AIM: To investigate the prevalence and distribution of developmental enamel defects in children with cerebral palsy (CP) in Beijing, China. DESIGN: A total of 135 children aged 1.5-6 years with moderate or severe congenital CP diagnosed in Beijing Boai Hospital from year 2005 to 2009 were recruited. The children underwent dental examination at the hospital dental clinic. RESULTS: Enamel defects (opacity and/or hypoplasia) were found in 44 (32.6%) out of 135 CP children. Enamel hypoplasia was found in 35 (25.9%) of the CP children, opacity alone was found in 5 (3.7%) of the CP children, and mixed defects (opacity and hypoplasia) was found in 4 (3.0%) of the CP children. Most of the enamel defects were located symmetrically in the primary incisors and first molars. 42.4% of children with enamel defects were born prematurely (<37 weeks) where as only 23.2% of them were born at normal gestational age. No statistically significant difference in the prevalence of enamel defects was found in relation to birth weight (P > 0.05). CONCLUSIONS: A high prevalence of developmental enamel defects was found among the children with CP. The prevalence of defects varied with the tooth type and was associated with gestational age of the children.


Assuntos
Paralisia Cerebral/epidemiologia , Esmalte Dentário/anormalidades , Peso ao Nascer , Paralisia Cerebral/classificação , Criança , Pré-Escolar , China/epidemiologia , Hipoplasia do Esmalte Dentário/epidemiologia , Feminino , Idade Gestacional , Humanos , Incisivo/anormalidades , Lactente , Recém-Nascido de Baixo Peso , Recém-Nascido , Recém-Nascido Prematuro , Masculino , Dente Molar/anormalidades , Prevalência , Estudos Retrospectivos , Dente Decíduo/anormalidades
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