Breast Carcinoma Cell Line MCF-7 Research Articles

Synthesis, characterization and biological research of novel 2-(quinoline-4-carbonyl)hydrazide-acrylamide hybrids as potential anticancer agents on MCF-7 breast carcinoma cells by targeting EGFR-TK.

Novel derivatives of the 2-(quinoline-4-carbonyl)hydrazide scaffold carrying the acrylamide moiety were synthesized and tested for their cytotoxic efficacy against the breast carcinoma MCF-7 cell line. The most active members 6a, 6b and 6h revealed significant antiproliferative action with an IC50 value of 3.39, 5.94 and 2.71 μM, respectively, which were more potent than the reference drug Dox (IC50 = 6.18 μM). Aiming to enlighten the antiproliferative activity, compounds 6a and 6h were examined for their inhibitory potential against EGFR kinase. The results demonstrated that compound 6h displayed potent inhibitory activity, as concluded from the IC50 value (IC50 = 0.22 μM) compared to the standard drug Lapatinib (IC50 value of 0.18 μM). Compound 6h was found to induce significant cellular cycle arrest at the G1 phase and provoke apoptosis. Besides, compound 6h triggered apoptosis via upregulating p53 and initiator caspase 9 by 7.4- and 8.7-fold, respectively, compared to DMSO controls.

Novel bis pyrimidine-pyrazolone and pyridinyl-4,5-dihydropyrimido[2,1[1]-c,1,2,4]triazepine utilized ultrasonic energy, anti-proliferative activity, docking simulation, and theoretical investigation

Eco-friendly synthesis of novel bis heterocyclic compounds containing pyridine derivatives utilized green tools such as ultrasonication energy. Moreover, the nucleophilic substitution of bis pyrimidine-2-thiol derivatives with hydrazine hydrate in glacial acetic acid in order to form the corresponding bis(hydrazinyl-6-(pyridin-yl)pyrimidin-4-yl) derivatives 3a-c in excellent yield. Furthermore, the latter obtained hydrazinyl pyrimidine derivatives 3a-c can easily be attacked with ethylacetoactate to give bis dihydro-3H-pyrazol-3-one derivatives 5a-c, while the reactivity of acetyl acetone in glacial acetic acid using ultrasonic energy affords the dihydropyrimido[2,1-c][1,2,4]triazepin-9-yl)-5-methyl-1H-1,2,3-triazol-1-yl)benzene derivatives 7a-c, and these compounds were elucidated utilized spectrum analysis. These obtained compounds were exhibited as having antitumor activity against MCF-7 breast and A-549 carcinoma cell lines via neutral red uptake assays, and bis compounds 5c and 7cshowed excellent activity comparable to the doxorubicin drug. Moreover, these biological evaluations were confirmed through molecular docking simulation with PDBID: 4hdq and PDBID:2ito, which showed the least binding affinity with -11.641 and -13.646 kcal/mol, respectively. Also, the theoretical calculation of these bis heterocycles was optimized through the DFT/B3LYP/6-31(G) basis set, which identified their physical descriptors and showed the stability of these bis compounds, confirmed the experimental work with FMO, ESP, and MEP.

Does Boric Acid Inhibit Cell Proliferation on MCF-7 and MDA-MB-231 Cells in Monolayer and Spheroid Cultures by Using Apoptosis Pathways?

Most breast cancers originate in the lobules or ducts of the breast. Breast cancer as the second main cause of death among women in the world is the most common kind of cancer in women. Studies have been conducted to find the optimal treatment for breast cancer. Moreover, the therapeutic effects of different drugs and substances on this disease have been intensively researched. Boric acid accounts for 96% of the boron content in body fluids, and its derivatives are absorbed by the human body. It is assumed to be represented as (B(OH)2). Experimental studies have shown a reduction of cell proliferation and stimulation of apoptosis in some melanoma, prostate, and colon cancer cell lines through boric acid. The aim of this study was to investigate if boric acid could be used for treating breast cancer. The impacts of boric acid on the human breast carcinoma cell lines MCF-7 and MDA-MB-231 were studied with TUNEL, BrdU, caspase-3, and endo-G immunohistochemical studies in 3D and 2D culture systems. Furthermore, we conducted a qRT-PCR study to show changes in the expression of some genes involved in apoptosis. Suppression of cell proliferation through boric acid-inducing apoptosis was observed both in 3D and 2D culture conditions. These results are compatible with the gene expression results. The ENDOG, CASP3, CASP8, and CASP9 gene expression significantly changed at all time intervals in MCF-7 and MD-MB-231 cell lines boric acid can potentially treat breast cancer as an anti-cancer agent candidate.

Computational and Molecular Docking Studies of New Benzene Sulfonamide Drugs with Anticancer and Antioxidant Effects.

The studies on the potential usage of benzene sulfonamide derivatives as anticancer agents are limited. benzene sulfonamide derivatives are currently used as anticancer agents against different breast cancer cell lines, such as MCF-7, lung cancer cells (A549), prostate cancer cells (Du-145), and cervical cells (HeLa). A series of new sulfonamide drugs are synthesized by reacting aldehydes thio-semi-carbazones derivatives with benzene sulphonyl chloride to form benzylidene-N-(phenylsulfonyl) hydrazine-1-carbothioamide derivatives. Studying the anticancer effects against MCF-7 breast carcinoma cell lines and the antioxidant activities of these newly synthesized compounds. Studying the anticancer effects against MCF-7 breast carcinoma cell lines and the antioxidant activities of these newly synthesized compounds. To study the anti-breast cancer activity of the newly synthesized compounds, a molecular docking study is used to analyze the binding energy for the nonbonding interactions between the ligands (studied compounds) and receptor (4PYP (pdb code: 4FA2)) against human breast cancer (MCF-7) cells. The bioavailability of all studied compounds is confirmed by pharmacological investigations using Mol inspiration and absorption, distribution, metabolism, excretion, and toxicity online servers. The two derivatives, 2-(4- methoxy benzylidene)-N-(phenylsulfonyl) hydrazine-1-carbothioamide (4c) and 2-(4-dimethylamino) benzylidene)-N-(phenylsulfonyl) hydrazine-1-carbothioamide (4e) show the most potent anticancer effects against MCF-7 breast carcinoma cell lines. Meanwhile, these two derivatives show the lowest antioxidant activities. The different spectral techniques were used to confirm the structure of the novel synthesized compounds. Further, 2-(4-(dimethyl amino) benzylidene)-N- (phenylsulfonyl)hydrazine-1-carbothioamide (4e) and 2-(4- methoxy benzylidene)-N-(phenylsulfonyl) hydrazine-1 carbothioamide (4c) were the most potent anticancer derivatives against MCF-7 breast carcinoma cell lines. Furthermore, they exhibited the most potent antioxidant activities. Meanwhile, the 2-benzylidene-N-(phenylsulfonyl) hydrazine-1-carbothioamide (4a) and 2-(4-chloro benzylidene)-N-(phenylsulfonyl) hydrazine-1-carbothioamide (4d) had the lowest antioxidant potentials. The estimated binding energies, inhibition constant, intermolecular energies, and reference RMSD produced from docking for all studied compounds were reported. These values showed that all studied compounds formed stable complexes with the receptor with high binding affinity. It was further noted from the ADMET analysis that compounds 4c, 4d, and 4e have good absorption, low toxicity in the human liver, and medium BBB penetration. Hence, these studied compounds (4c-4e) may be suggested as potential compounds against human breast cancer MCF-7 cells.

Inhibition of Increased Invasiveness of Breast Cancer Cells With Acquired Tamoxifen Resistance by Suppression of CYR61.

Hormone sensitivity-targeted therapy with selective estrogen receptor modulators (SERMs), such as 4-hydroxytamoxifen (4-OHT), is the mainstay of treatment for breast cancers (BCs) that express estrogen receptor α (ERα). However, development of resistance limits this therapy approach. The question arises whether changes associated with 4-OHT resistance could be exploited therapeutically. First, 4-OHT-resistant sublines of ERα-positive breast carcinoma cell lines MCF-7 and T47D were generated. Viability was assessed by the Alamar Blue assay. Cell invasion was quantified in modified Boyden chambers with Matrigel. Changes in expression of CYR61, S100A4, and ERα were examined by RT-qPCR. Expression of CYR61 was suppressed by transient gene silencing using siRNA. Successful suppression was verified by western blot. Efficacy of 4-OHT treatment was analyzed by quantification of viability using Alamar Blue assay. Correlation of CYR61 levels in patients with luminal A BC to distant metastases-free survival was determined by Kaplan-Meier analysis. ERα-positive MCF-7 and T47D BC cells exhibit an extremely weak invasion rate. Acquired tamoxifen resistance significantly increased the invasive behavior of both tamoxifen-resistant MCF-7-TR and T47D-TR sublines. In addition, expression of CYR61 and S100A4 showed significantly increased levels, whereas expression of ERα was decreased. Suppression of CYR61 expression resulted in a significant decreased invasion rate. In addition, expression of S100A4 was reduced, whereas expression of ERα was increased. Furthermore, suppression of CYR61 resulted in re-sensitization to 4-OHT. High CYR61 levels in patients with luminal A BC resulted in reduced distant metastases-free survival. The prometastatic factor CYR61 appears to play an important role in the increased invasiveness of tamoxifen-resistant ERα-positive BC cells. Its suppression leads to a lower invasion rate. Given the few therapeutic options available for tamoxifen-resistant BC, therapy that reduces CYR61 may improve its treatability in future.

Feeding a High-Fat Diet for a Limited Duration Increases Cancer Incidence in a Breast Cancer Model

High-fat intake by young Asian women impacts the risk of breast cancer. Understanding the underlying molecular mechanisms may be essential for disease prevention in Asia as well as globally. We aimed to examine the effects of corn oil- and animal fat-based high-fat diets (32.9 and 31.4%, respectively, of fat energy ratio as compared to 12.3% in the standard diet) on mammary carcinogenesis and alterations in gene expression and epigenetic statuses in the mammary gland during the growth stages in a rat model. An increased incidence of carcinomas was observed after the cessation of high-fat feeding. In addition, rapid tumor growth and elevations in Celsr2 expression, which may be a result of DNA hypomethylation patterns in the 3′ untranslated region of the gene were noted in the animal fat group. In the human breast carcinoma cell line MCF7, a marginal decrease in cell viability was observed following the knockdown of Celsr2, suggesting that the animal fat-associated risk of cancer is partly due to the deregulation of mammary cell proliferation via non-metabolic gene functions. The present results will contribute to the development of strategies for controlling the food-associated risk of breast cancer, particularly in younger age groups.

Synthesis and biological evaluation of thiazole and thiadiazole derivatives as potential anticancer agents

A new series of 4-methyl-2-{2-[(aryl)methylidene]hydrazinyl}-1,3-thiazole (2a-i), N-(4-acetyl-5-aryl)4,5-dihydro-1,3,4-thiadiazol-2-yl)acetamides (3a-b) and N-(5-(4-(substituted phenyl)-1,3,4-thiadiazol-2-yl)acetamides (3c-i) were synthesized by the reaction of 2-((aryl)methylene)hydrazine-1-carbothioamides (1a-i) and acetic anhydride or chloroacetone. The cytotoxic activities of the products were evaluated by MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) assay against Hela cervical cancer, MCF-7 breast carcinoma and HT-29 colorectal cancer cell lines. Thiazole based compounds 2a, 2b, 2f and 2i, bearing 4-bromothiophen-2-yl, naphthalen-2-yl, 2,5-difluorophenyl and 4-(trifluoromethoxy)phenyl moieties, respectively; also N-(4-acetyl-5-(naphthalen-2-yl)-4,5-dihydro-1,3,4-thiadiazol-2-yl)acetamide (3b) and N-(5-(2,6-difluorophenyl)-1,3,4-thiadiazol-2-yl)acetamide (3d) exhibited significant anticancer activity against three cancer cell lines. Moreover, these active compounds were further evaluated by apoptotic protein levels. The results showed that these thiazole and thiadiazole compounds induced apoptosis of cancer cells.

Vitamin D3 and Salinomycin synergy in MCF-7 cells cause cell death via endoplasmic reticulum stress in monolayer and 3D cell culture

1α, 25, dihydroxyvitamin D3 (1,25D), the active form of vitamin D3, has antitumor properties in several cancer cell lines in vitro. Salinomycin (Sal) has anticancer activity against cancer cell lines. This study aims to examine the cytotoxic and antiproliferative effect of Sal associated with 1,25D on MCF-7 breast carcinoma cell line cultured in monolayer (2D) and three-dimensional models (mammospheres). We also aim to evaluate the molecular mechanism of Sal and 1,25D-mediated effects. We report that Sal and 1,25D act synergistically in MCF-7 mammospheres and monolayer causing G1 cell cycle arrest, reduction of mitochondrial membrane potential (MMP), and reactive oxygen species (ROS) overproduction with a long-lasting cytotoxic response represented by clonogenic and mammosphere assay. We observed the induction of cell death by apoptosis with upregulation in mRNA levels of apoptosis-related genes (CASP7, CASP9, and BBC3). Extensive cytoplasmic vacuolization, a morphological characteristic found in paraptosis, was also seen and could be triggered by endoplasmic reticulum stress (ER) as we found transcriptional upregulation of genes related to ER stress (ATF6, GADD153, GADD45G, EIF2AK3, and HSPA5). Overall, Sal and 1,25D act synergistically, inhibiting cell proliferation by activating simultaneously multiple death pathways and may be a novel and promising luminal A breast cancer therapy strategy.

Modeling the influence of cell–cell contact and TGF-β signaling on the epithelial mesenchymal transition in MCF7 breast carcinoma cells

The epithelial mesenchymal transition (EMT) is a process by which cells lose their adhesive nature and gain the migratory properties associated with mesenchymal cells. This transition allows cells to migrate away from a primary tumor while maintaining their newly acquired invasive behavior, suggesting that there is a bistable switch between the epithelial and mesenchymal phenotypes. In recent experimental work, we found evidence of this bistability in the MCF7 breast carcinoma cell line (Gasior et al., 2019). Underlying the complex processes governing EMT, we identify a feedback loop between E-cadherin, a protein involved in cellular adhesion, and Slug, a transcription factor that is upregulated during EMT. Here, we present a simple mathematical model that examines the relationship between E-cadherin and Slug in response to pro-epithelial and pro-mesenchymal factors, cell–cell contact and TGF-β, respectively. We hypothesize that cell–cell contact is a critical component in the transition from the epithelial to the mesenchymal phenotype and that it is possible to initiate EMT with the loss of cell–cell contact or the activation of the TGF-β signaling pathway. We propose a reversible bistable switch in response to a loss of cell–cell contact but an irreversible bistable switch when the cell is exposed to TGF-β. Taken together, this model shows that acquiring and retaining invasive behavior by cells with high levels of cell–cell contact is not impossible but, instead, depends on the cooperation between the two switches. The predictions of this model for E-cadherin and Slug levels were compared against relative gene expression data from our recent experiments with MCF7 cells (Gasior et al., 2019). Our model works well to predict E-cadherin and Slug mRNA expression in low confluence experiments, while also highlighting issues that arise when comparing experimental results to theoretical predictions.

Design, synthesis of anticancer and anti-inflammatory 4-(1-methyl-1H-indol-3-yl)-6-(methylthio) pyrimidine-5-carbonitriles

A novel series of 4-(1-methyl-1H-indol-3-yl)-6-(methylthio) pyrimidine-5-carbonitriles (4a–i) was synthesized and evaluated for anticancer potential against cell lines for breast cancer. Compounds 4b, 4e, and 4h exhibited prominent cytotoxicity against human breast carcinoma MCF-7 cell line with GI50 of 2.0, 0.5, and 0.5 µM, respectively. Molecular docking study against EGFR tyrosine kinase could provide valuable insights into the plausible mechanism of action. The compounds could bind with significantly high binding affinity and their binding affinity scores could correlate well with the observed anticancer activity. Furthermore, compounds 4a, 4c, 4e, 4g, and 4i exhibited significant inflammatory activities as well which could expand the therapeutic domain of this novel series.

Novel Suberoylanilide Hydroxamic Acid Analogs Inhibit Angiogenesis and Induce Apoptosis in Breast Cancer Cells.

Histone deacetylases (HDACs) are the enzymes that catalyze the removal of the acetyl group from lysine residues and regulate several biological processes. Suberoylanilide hydroxamic acid (SAHA) is a notable HDAC inhibitor that exhibited remarkable anti-proliferative efficiency by alleviating gene regulation against solid and hematologic cancers. The aim of this study was to develop new chemotherapeutic agents for breast cancer treatment, therefore, a novel series of Suberoylanilide hydroxamic acid (SAHA) analogs were investigated as anticancer agents. We designed and synthesized a novel series of analogs derived from SAHA by substituting alkyl, alkoxy, halo, and benzyl groups at different positions of the phenyl ring. The newly synthesized analogs were assessed for their cytotoxic potential against four human cancer cell lines in comparison with healthy cell lines, using several biological assays. SAHA analogs displayed significant cytotoxic potential with IC50 values ranging from 1.6 to 19.2 μM in various tumor cell lines. Among these analogs, 2d (containing 3-chloro, 4-floro substitutions on phenyl moiety), 2h (containing 3,4-di chloro substitutions on phenyl moiety), and 2j (containing 4-chloro, 3-methyl substitutions on phenyl moiety) showed significant cytotoxic potential with IC50 values ranging from 1.6 to 1.8 μM in MCF-7 (breast carcinoma) cell line. More importantly, these analogs were found to be non-toxic towards healthy primary human hepatocytes (PHH) and mouse fibroblast cells (NIH3T3), which represent their tumor selectivity. These analogs were further analyzed for their effect on cell migration, BrdU incorporation, Annexin V-FITC and cell cycle arrest (Sub-G1 phase). Remarkably, analogs 2d, 2h, and 2j displayed significant HDAC inhibition than the parent SAHA molecule. Further studies also confirmed that these SAHA analogs are efficient in inducing apoptosis, as they regulated the expression of several proteins involved in mitochondrial or intrinsic apoptosis pathways. Findings in the Chick Chorioallantoic Membrane (CAM) assay studies revealed anti-angiogenic properties of the currently described SAHA analogs. From anti-proliferative study results, it is clearly evident that 3,4-substitution at the SAHA phenyl ring improves the anti-proliferative activity of SAHA. Based on these findings, we presume that the synthesized novel SAHA analogs could be potential therapeutic agents in treating breast cancer.

Theaflavin-3-gallate, a natural antagonist for Hsp90: In-silico and in-vitro approach

Poor prognosis and metastasis have been recognized as the major cause of breast cancer related deaths worldwide. Recent experimental evidence has shown that Hsp90, the prime chaperone, is overexpressed in many cancers and is responsible if reducing the 5-year survival rate of cancer patients. Therefore, targeted inhibition of Hsp90 may be a new and effective way to target cancer as well as enhancing therapeutic outcomes. In the present study, screening and simulation of potential natural compounds result in the identification of theaflavin-3-gallate as a promising inhibitory compound of Hsp90. Further in-vitro validation of the cytotoxic effect of theaflavin-3-gallate in human breast carcinoma cell line MCF7 and normal cell line MCF10A revealed that theaflavin-3-gallate significantly inhibited the cell proliferation of MCF7 cells whereas no cytotoxic effect was observed on MCF10A cells. We also found that theaflavin-3-gallate significantly induced programmed cell death by arresting cells in the G2/M phase of the cell cycle. A significant decrease in cell migration and colony formation by theaflavin-3-gallate treatment was also observed in MCF7 cells. Furthermore, theaflavin-3-gallate significantly downregulated the mRNA expression patterns of the HSP90, MMP9, VEGFA, and SPP1 genes. Collectively, our results demonstrated theaflavin-3-gallate as a potential natural Hsp90 inhibitor that can be used to enhance the therapeutic efficacy of existing breast cancer therapies and improve overall survival of breast cancer patients.

Anticancer Impact of Nitric Oxide (NO) and NO Combination with SMYD-3 Inhibitor on Breast Carcinomas.

Despite enormous advances in the detection and treatment of breast cancer, it still remains the leading cancer diagnosis and has the second highest mortality rate. Thus, breast cancer research is a high priority for academics and clinicians alike. Based on previous research indicating the potential of nitric oxide (NO) and SMYD-3 inhibition, this work sought to expand upon these concepts and combine the two approaches. Both NO (from S-Nitrosoglutathione (GSNO)), termed Group 1, and a combination therapeutic, inhibitor-4 (SMYD-3 inhibitor) plus NO (from GSNO), termed Group 2, were evaluated for their efficacy on breast carcinoma cell lines MCF7 and MDA-MB-231, and the normal MCF10A breast cell line, using cellular viability, colony formation capacity, cytotoxicity, and cellular apoptosis analysis. These results indicated that, in Group 1, breast carcinoma lines MCF7 and MDA-MB-231, cells experienced a moderate reduction in cellular viability (~20–25%), a large reduction in colony formation capacity (~80–90%), a moderate increase in the relative number of dead cells, and a moderate increase in cellular apoptosis. Group 2 was significantly more impactful, with a ~50% knockdown in cellular viability, a 100% reduction in colony formation capacity, a large increase in the relative number of dead cells, and a large increase in cellular apoptosis. Additionally, Group 2 induced a very small impact on the normal MCF10A cell line. Cumulatively, this work revealed the exciting impact of this combination therapeutic, indicating its potential for clinical application and further research.

Newly synthesized Olaparib Analogues: Estimation of The Clinical Activity Against MCF-7 breast Carcinoma Cell Line.

Newly synthesized Olaparib Analogues: Estimation of The Clinical Activity Against MCF-7 breast Carcinoma Cell Line.

Chemical Constituents from the Leaves of Pachyrhizus erosus Collected in Vietnam.

A phytochemical investigation of methanol extract from leaves of Pachyrhizus erosus (L.) Urban, a leguminous shrub distributed in Vietnam and other tropical and subtropical countries led to the isolation of a new prenylated chalcone, erosusone (1) and a new megastigmane glycoside epimer, 3-episedumoside F1 (9), together with thirteen known compounds including flavonoids (2-6), a 3-benzoxepine lactone (7), a pyridine-4,5-diol derivative (8), megastigmanes and megastigmane glycosides (10-15). Their structures were elucidated by means of high resolution-electrospray ionization (HR-ESI)-MS, one dimensional (1D) and two-dimensional NMR (2D-NMR) spectroscopy as well as comparison with the data reported in the literature. The cytotoxic effects on LU-1 (lung carcinoma), HepG2 (hepatocellular carcinoma), and MCF7 (breast carcinoma) cell lines were assessed. Prenylated chalcones 1-2 and isoflavone 3 exhibited cytotoxicity against all tested cell lines with IC50 values ranging from 22.04 to 45.03 µM.

Design and Characterization of Maltoheptaose-b-Polystyrene Nanoparticles, as a Potential New Nanocarrier for Oral Delivery of Tamoxifen.

Tamoxifen citrate (TMC), a non-steroidal antiestrogen drug used for the treatment of breast cancer, was loaded in a block copolymer of maltoheptaose-b-polystyrene (MH-b-PS) nanoparticles, a potential drug delivery system to optimize oral chemotherapy. The nanoparticles were obtained from self-assembly of MH-b-PS using the standard and reverse nanoprecipitation methods. The MH-b-PS@TMC nanoparticles were characterized by their physicochemical properties, morphology, drug loading and encapsulation efficiency, and release kinetic profile in simulated intestinal fluid (pH 7.4). Finally, their cytotoxicity towards the human breast carcinoma MCF-7 cell line was assessed. The standard nanoprecipitation method proved to be more efficient than reverse nanoprecipitation to produce nanoparticles with small size and narrow particle size distribution. Moreover, tamoxifen-loaded nanoparticles displayed spherical morphology, a positive zeta potential and high drug content (238.6 ± 6.8 µg mL−1) and encapsulation efficiency (80.9 ± 0.4 %). In vitro drug release kinetics showed a burst release at early time points, followed by a sustained release profile controlled by diffusion. MH-b-PS@TMC nanoparticles showed higher cytotoxicity towards MCF-7 cells than free tamoxifen citrate, confirming their effectiveness as a delivery system for administration of lipophilic anticancer drugs.

Anti-Proliferative and Pro-Apoptotic Activities of Synthesized 3,4,5 Tri-Methoxy Ciprofloxacin Chalcone Hybrid, through p53 Up-Regulation in HepG2 and MCF7 Cell Lines.

Background:Cancer is a significant health problem around the world and one of the leading causes of human death. The need for novel, selective and non-toxic anti-cancer agents is still urging. Aim of the work: to investigate the anti-proliferative and pro-apoptotic effects of the synthesized ciprofloxacin 3,4,5 tri-methoxy chalcone hybrid (CCH) on the HepG2 hepatocellular carcinoma and MCF7 breast carcinoma cell lines. Materials and Methods:HepG2 and MCF7cell lines were treated with CCH. Cell viability and cell cycle analysis were performed. Protein and mRNA expression levels of P53, COX-2 and TNF-α were analyzed by western blotting and RT-PCR respectively. Results:CCH caused concentration and time-dependent reduction in the viability of human HepG2 and MCF7 cells, pre-G1 apoptosis and cell cycle arrest at G2/M stage, significantly higher P53 and TNF-α mRNA and protein expression levels but significantly lower COX2 mRNA and protein expression levels. Conclusion:CCH showed obvious anti-proliferative and apoptosis-inducing activities in both cell lines.

DHRS2 is a potential marker of breast cancer metastasis

BackgroundAlthough breast cancer treatment success has increased, biomarkers are still important. The dehydrogenase/reductase DHRS2 has a role in the metabolic and survival activities of cells. DHRS2 directly binds MDM2 and inhibits the cellular processes of p53. Our study aimed to examine cellular response to inhibit DHRS2 gene expression in the breast cancer cell line MCF7. Methods and resultsThe RNAi suppressed DHRS2 expression has been investigated in the breast carcinoma cell line MCF7 and, different study groups were formed to observe the impact. Afterward, an apoptotic marker was applied to the groups for measuring the amount of apoptotic and necrotic cells by flow cytometer. Cells were stained with trypan blue for cell viability, and we used an MTT assay for cellular proliferation measurement. Finally, migration experiments were performed using the wound healing model, and their gap width was calculated with the ImageJ program. Comparing to the non-transfected cells (NTC), the apoptotic cell number of non-targeting (NT) and DHRS2 siRNA (si-DHRS2) transfected groups had less quantity. While there was no critical difference in proliferation and viability, DHRS2 deficient cells gave the lowest closure rate than control groups in migration tests. The gene silencing rates of all groups were controlled by quantitative PCR. ConclusionsThe migration assay results of DHRS2 inhibition, the gene popularity is increasing day by day in the literature, will be pioneers for metastasis studies. It is also usual that cell apoptosis and proliferation, which have many regulatory mechanisms, are not critically affected by the absence of DHRS2.

<p><strong>Apoptosis mediated cytotoxic potential of <em>Erythrina variegata</em> L. stem bark in human breast carcinoma cell lines</strong></p>

Erythrina variegata L. (Fam. Fabaceae) is traditionally known for antitumour, expectorant, febrifuge, antibacterial and antioxidant activities. In the present study, we did cytotoxic evaluation of the methanol extract of E. variegata stem bark (MEV) using 3-(4,5-dimethyl thazol-2-yl)-2,5-diphenyl tetrazolium bromide (MTT) assay in MCF-7 and MDA-MB-231 human breast carcinoma cell lines. The cytological and metabolic alterations due to MEV was evaluated using acridine orange/ethidium bromide (AO/EB) dual staining, hoechst 33258 and fluoroprobe, benzimidazol-carbocyanine iodide 5,5',6,6'-tetrachloro-1,1',3,3'-tetra ethyl (JC-1) staining. The antiapoptotic gene and protein, Bcl-2 expression was analysed using real time PCR and Western blotting, respectively. The methanol extract was investigated for the presence of various phytochemicals using gas chromatography high resolution mass spectrometry (GC-HRMS). The results revealed a dose dependent cytotoxic activity in both MDA-MB-231 and MCF-7 breast carcinoma cell lines in vitro. The plant extract was effective in inducing apoptotic cell death via mitochondrial dependent intrinsic pathway and may be considered as a potent source for isolating therapeutic molecules against cancer.

MP-SeNPs; A Promising Cytokines Suppressor in Benzo[a]pyrene-Induced Mammal Tissue Injury in Rats.

<b>Background and Objective:</b> <i>Moringa peregrina</i> (family Moringaceae) is a common flowering plant found in the Arabian Peninsula, Horn of Africa and Southern Sinai, Egypt. The purpose of this study was to investigate the protective activity of MP-SeNPs against BaP-induced mammal tissue injury in rats. <b>Materials and Methods:</b> MP-SeNPs were prepared and characterized in terms of particle size and zeta potential. Furthermore, the IC<sub>50</sub> of MP-SeNPs against the Mcf7 breast carcinoma cell line and LD<sub>50</sub> was evaluated. Adult albino rats weighing approximately 187±10 g was used to assess the lung protective activity of MP-SeNPs (28.7 and 71.75 mg kg<sup>1</sup> b.wt.) against BaP-induced mammal tissue injury in rats. <b>Results:</b> The mean particle size of MP-SeNPs was 134.69±8.24 nm with negative zeta potential of +26.04 with the observed shapes of nano particle was spherical. Also, IC<sub>50</sub> of MP-SeNPs against Mcf7 breast carcinoma cell line = 89.57 μg mL<sup>1</sup> and LD<sub>50</sub> equals and 1435 mg kg<sup>1</sup> b.wt., respectively. The daily oral administration of MP-SeNPs at concentrations of 28.7 and 71.75 mg kg<sup>1</sup> b.wt. for 30 days to rats treated with BaP (20 mg kg<sup>1</sup> b.wt.) resulted in a significant improvement of IL-2, IL-6 and IL-10. Oral administration of MP-SeNPs, on the other hand, increased the levels of SOD, GPx, TNF-α, iNOs and GSH as well as decreased the level of MDA in mammal tissue of BaP-treated rats. Furthermore, MP-SeNPs almost normalized these effects in mammal tissue histoarchitecture and MRI examination. <b>Conclusion:</b> The biochemical, histological and MRI findings incurrent study demonstrated that MP-SeNPs have protective activity against BaP-induced mammal tissue injury in rats.