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

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

Mechanical Network in Titin Immunoglobulin from Force Distribution Analysis

The role of mechanical force in cellular processes is increasingly revealed by single molecule experiments and simulations of force-induced transitions in proteins. How the applied force propagates within proteins determines their mechanical behavior yet remains largely unknown. We present a new method based on molecular dynamics simulations to disclose the distribution of strain in protein structures, here for the newly determined high-resolution crystal structure of I27, a titin immunoglobulin (IG) domain. We obtain a sparse, spatially connected, and highly anisotropic mechanical network. This allows us to detect load-bearing motifs composed of interstrand hydrogen bonds and hydrophobic core interactions, including parts distal to the site to which force was applied. The role of the force distribution pattern for mechanical stability is tested by in silico unfolding of I27 mutants. We then compare the observed force pattern to the sparse network of coevolved residues found in this family. We find a remarkable overlap, suggesting the force distribution to reflect constraints for the evolutionary design of mechanical resistance in the IG family. The force distribution analysis provides a molecular interpretation of coevolution and opens the road to the study of the mechanism of signal propagation in proteins in general