16 research outputs found
Combined Effects of Nanoroughness and Ions Produced by Electrodeposition of Mesoporous Bioglass Nanoparticle for Bone Regeneration
Providing appropriate biophysical and biochemical cues to the interface is a facile strategy to enhance the osteogenic ability of metallic implants. Here we exploited this through the incorporation of mesoporous bioactive glass nanoparticles (MBGN) at a high content (1:1 by weight) to a biopolymer chitosan in the electrodeposition process of titanium. The MGBN/chitosan layer thickness, tunable by electrodeposition parameters, exhibited an accelerated ability of apatite mineral induction in a body simulating medium. Of note, the involvement of MBGN could generate nanoscale roughness in a unique range of 10-25 nm. Moreover, the layer showed a slowly releasing profile of ions (calcium and silicate) over weeks at therapeutically relevant doses. The ion-releasing nanotopological surface was demonstrated to alter the preosteoblasts responses in a way favorable for osteogenic differentiation. The combinatory cues of nanotopology (25 nm roughness) and ion release enabled highly accelerated cellular anchorage with somewhat limited spreading area at initial periods. The subsequent osteoblastic differentiation behaviors on the engineered surface, as examined up to 21 days, showed significantly enhanced alkaline phosphate activity and up-regulated expression of bone-associated genes (ALP, Col I, OPN, and OCN). These results indicate that the combinatory cues provided by nanotopology (25 nm roughness) and ions released from MBGN are highly effective in stimulating osteoblastic differentiation and suggest that the MBGN/chitosan may serve as a potential composition for bone implant coatings
In vitro anticancer activity of ethanolic extract of Stoechospermum marginatum against HT-29 human colon adenocarcinoma cells
169-175Colorectal cancer is a one of the leading causes of death globally and its clinical management of cancer involves
chemotherapy. Increase in the development of resistance to the drugs used in the cancer treatment and serious side effects
associated with chemotherapeutic drugs are the major limitations in cancer therapy. Hence, there exists a huge need to
develop safer natural therapeutic products for cancer therapy. In this study, ethanolic extract of Stoechospermum
marginatum was evaluated for its anticancer activity. The cytotoxicity of S. marginatum extract was evaluated on HT-29
cells by MTT assay. Trypan blue cell viability was also carried out to evaluate cytotoxicity and antiproliferative effect. The
apoptosis-inducing potential of the extract was analyzed by acridine orange and ethidium bromide dual staining method,
mitochondrial membrane potential assay and FITC Annexin V-Propidium iodide staining method. The ethanolic extract of
S. marginatum showed significant dose-dependent cytotoxicity in HT-29 cells Treatment with S. marginatum extract
increased number of apoptotic cells in HT-29 cells and caused damage to mitochondrial membrane potential. The findings
of the present study confirmed in vitro anticancer activity of ethanolic extract S. marginatu
Global variation in anastomosis and end colostomy formation following left-sided colorectal resection
Background
End colostomy rates following colorectal resection vary across institutions in high-income settings, being influenced by patient, disease, surgeon and system factors. This study aimed to assess global variation in end colostomy rates after left-sided colorectal resection.
Methods
This study comprised an analysis of GlobalSurg-1 and -2 international, prospective, observational cohort studies (2014, 2016), including consecutive adult patients undergoing elective or emergency left-sided colorectal resection within discrete 2-week windows. Countries were grouped into high-, middle- and low-income tertiles according to the United Nations Human Development Index (HDI). Factors associated with colostomy formation versus primary anastomosis were explored using a multilevel, multivariable logistic regression model.
Results
In total, 1635 patients from 242 hospitals in 57 countries undergoing left-sided colorectal resection were included: 113 (6路9 per cent) from low-HDI, 254 (15路5 per cent) from middle-HDI and 1268 (77路6 per cent) from high-HDI countries. There was a higher proportion of patients with perforated disease (57路5, 40路9 and 35路4 per cent; P < 0路001) and subsequent use of end colostomy (52路2, 24路8 and 18路9 per cent; P < 0路001) in low- compared with middle- and high-HDI settings. The association with colostomy use in low-HDI settings persisted (odds ratio (OR) 3路20, 95 per cent c.i. 1路35 to 7路57; P = 0路008) after risk adjustment for malignant disease (OR 2路34, 1路65 to 3路32; P < 0路001), emergency surgery (OR 4路08, 2路73 to 6路10; P < 0路001), time to operation at least 48 h (OR 1路99, 1路28 to 3路09; P = 0路002) and disease perforation (OR 4路00, 2路81 to 5路69; P < 0路001).
Conclusion
Global differences existed in the proportion of patients receiving end stomas after left-sided colorectal resection based on income, which went beyond case mix alone
In vitro anticancer activity of ethanolic extract of Stoechospermum marginatum against HT-29 human colon adenocarcinoma cells
Colorectal cancer is a one of the leading causes of death globally and its clinical management of cancer involves chemotherapy. Increase in the development of resistance to the drugs used in the cancer treatment and serious side effects associated with chemotherapeutic drugs are the major limitations in cancer therapy. Hence, there exists a huge need to develop safer natural therapeutic products for cancer therapy. In this study, ethanolic extract of Stoechospermum marginatum was evaluated for its anticancer activity. The cytotoxicity of S. marginatum extract was evaluated on HT-29 cells by MTT assay. Trypan blue cell viability was also carried out to evaluate cytotoxicity and antiproliferative effect. The apoptosis-inducing potential of the extract was analyzed by acridine orange and ethidium bromide dual staining method, mitochondrial membrane potential assay and FITC Annexin V-Propidium iodide staining method. The ethanolic extract of S. marginatum showed significant dose-dependent cytotoxicity in HT-29 cells Treatment with S. marginatum extract increased number of apoptotic cells in HT-29 cells and caused damage to mitochondrial membrane potential. The findings of the present study confirmed in vitro anticancer activity of ethanolic extract S. marginatu