Showing 8 results for Apoptosis
Mm Amiri, Z Jadali, Sa Mirshafie, A Sarrafnezhad, M Rasoolinejad, M Ravanbakhsh, M Rohani , Ma Boyer, Ar Salehi Nodeh,
Volume 3, Issue 3 (3-2010)
Abstract
Background and Aim: The present study was designed to compare the cell death, circulating levels of tumor necrosis factor-α and tumor necrosis factor type-I receptor in Iranian patients with sepsis and normal controls.
Materials and methods: Twenty-two patients with sepsis were included in this study. After blood collection, the serum circulating levels of TNF- and TNFRI measured with ELISA kits. The PBMCs isolated from blood samples and proportion of apoptotic cells measured by flowcytometry at the time of blood draws (0 time) and after 24-h incubation. PBMCs incubated at 37°C in culture (spontaneous apoptosis) and in the presence of rTNF that is capable of inducing apoptosis in activated T cells expressing the TNF family of receptors.
Results: PBMCs obtained from the patients showed significantly higher (P<0.001) proportion of apoptotic cells than PBMCs of controls at 0 time, indicated that a higher fraction of PBMCs were undergoing apoptosis in vivo in patients but not in controls. After 24-h incubation, spontaneous ex vivo apoptosis of PBMCs was nearly as high as that of TNF- induced apoptosis, indicating that activated T cells had been preprogrammed in vivo to die.
Discussion and Conclusion: The circulating levels of both TNF- and TNFRI showed significantly higher in patients (P<0.001) than controls and this increase is proportional (r=0.908) in both indicating that TNFRI may have a protective effect in the early stage of sepsis.
Soodeh Namjoo, Fatemeh Nadali, Ahmad Kazemi, Hossein Dargahi, Hossein Rezaiezadeh, Shahrbanoo Rostami, Seyed Nasser Ostad,
Volume 6, Issue 3 (9-2012)
Abstract
Background and Aim: Acute leukemia is one of the main causes of cancer in the world. Now a days using natural materials as source of anticancer drugs is more recommended. HESA-A is a drug of herbal-marine origin (patented by Iranian researcher). HESA-A is composed of 50% inorganic substance، 45% organic substance (aminoenthraquinone) and 5% water. In this study effects of HESA-A، on NB4 cell line (Acute promyelocytic leukemia cells) was evaluated.
Materials and Methods: HESA-A was prepared in normal saline as a stock solution (80 mg/ml, PH=7.4), and then was sterilized. After culturing and proliferation of NB4 cell line, the cells were treated by doses of 1, 2, 4 and 8 mg/ml of HESA-A. Respectively after 72h, the percentage of viable and dead cells were counted by using Trypan blue staining in Neubanr hemocytometer. Then by MTTassay, the percentage of cell survival were determined by ELISA reader in 570nm. Finally the effects of HESA-A on apoptosis were evaluated by flocytometery.
Results: This invitro study shows that HESA-A has a cytotoxcic and antiprolifrative effects against NB4 cell line (Dose dependent).IC50 dose was 5mg/ml .HESA-A can result in apoptosis in 50% of the cells.
Conclusion: Although the mechanism of HESA-A cytotoxicity action is not known, yet this study shows that this drug may cause apoptosis of cells by dose dependent method.
Mahdihe Ghasemi, Fatemeh Nadali, Seyed Naser Ostad, Farhad Zaker, Shahrbanoo Rostamy, Hossein Dargahi,
Volume 6, Issue 4 (11-2012)
Abstract
Background and Aim: Chronic myelogenous leukemia is characterized by Philadelphia (Ph) chromosome, the presence of BCR-ABL fusion gene and constitutive activation of the ABL1 tyrosine kinase. Despite an excellent result of target therapy by imatinib, some patients develop resistance to imatinib. In this study Efficacy of HESA-A on proliferation and apoptosis of K562 cell line was assessed.
Materials and Methods: In this study doubling time of K562 cell line was calculated. The cells were affected by various concentrations of HESA-A(1,2,4 and 8 mg/ml respectively). Cytotoxicity and IC50 dose of HESA-A were detected by MTT and trypan blue exclusion assay. Apoptosis was assessed by flowcytometry after 48 h cell treatment in the presence of IC50 dose.
Results: Doubling time of K562 cells was 24 hours. HESA-A reduced the number of viable K562 cells in a concentration dependent manner.IC50 dose was 3.5 mg/ml. In flowcytometry analysis of apoptosis, 19.22% of the treated cells were located in the position of the necrotic cells.
Conclusion: The results of MTT and trypan blue exclusion assay suggest that HESA-A inhibits the growth of k562 cells in a concentration dependent manner and induces necrosis in K562 cells.
Behnaz Tavasoli , Majid Safa , Ahmad Kazemi,
Volume 8, Issue 5 (1-2015)
Abstract
Background and Aim: Indole-3-carbinol (I3C), found in Brassica species vegetables, exhibits antitumor effects. It has been shown that I3C induces apoptosis in various cell types through inactivation of the nuclear factor-kappa B (NF- k B) pathway. Anthracyclines such as doxorubicin, is widely used in the treatment of hematological malignancies, induce apoptosis in tumor cells via DNA damage and activation of p53. However, NF- k B pathway that activated by anthracyclines as a part of DNA damage response can induce chemo resistance. In this study the apoptotic effect of doxorubicin in combination with NF- k B inhibitor I3C was assessed in acute lymphoblastic leukemia cells.
Materials and Methods: Human pre-B acute lymphoblastic leukemia cell line, NALM-6 cells, were preincubated with various concentrations of I3C for1 hour and then treated with 125nM doxorubicin at 37 ° C for 24 hours. Cellular DNA content assay and Annexin V-FITC staining were performed by flowcytometry for evaluation of apoptosis.
Results: DNA histogram analysis of NALM-6 cells indicates that combination of I3C with doxorubicin synergistically escalated the percentages of sub-G1 population cells (apoptotic cells) as compared to doxorubicin-only treated group. Annexin V-FITC staining showed that cotreatment of NALM-6 cells with I3C and doxorubicin increased the proportion of Annexin-V positive cells (early apoptotic cells) in comparison with the doxorubicin treated cells.
Conclusion: The results of cell culture treatments and cell death analysis by flowcytometry suggest that I3C synergistically potentiates doxorubicin-induced apoptosis in human leukemia NALM-6 cells.
Maryam Valizadeh, Leila Rouhi, Seyed Hossein Hejazi,
Volume 12, Issue 3 (9-2018)
Abstract
Background and Aim: Breast cancer is one of the most common types of cancers and is the second leading cause of death form of cancer in women. In recent years, many scientific and medical studies have shown that Green tea has anti-proliferative, anti-mutagenic, anti-oxidant, antibacterial and antiviral effects. Some Green tea polyphenols have anti-cancer activity. In the present study, the effect of Green tea extract was evaluated on the Breast cancer cell line (SK-BR-3) and compared with human fibroblast cell line (HU-02).
Materials and Methods: SK-BR-3 and HU-02 cell lines were treated for 24, 48 and 72 hours with different concentrations of Green tea (50, 100, 200, 400 and 800 μg/ml). Then, Bioavailability was analyzed by MTT kit and Apoptosis was analyzed by flow cytometry using an Annexin V-FITS Kit.
Results: With increasing concentrations of Green tea extract in dose and time dependent manner, bioavailability of cells showed a decrease as compared to control group. Increased incidence of apoptosis was significantly higher in other experimental groups than the control group, while the concentration of 800 μg/ml of Green tea extract was more effective in SKBR3 cell line. Green tea did not show significant effect in HU-02 cells.
Conclusion: Due to the fact that cell proliferation and abnormal apoptosis are one of the main characteristics of cancer cells, Green tea can be used to reduce cell proliferation and increase apoptosis in prevention and treatment of Breast cancer.
Sanaz Noroozi, Rahim Ahmadi, Minoo Iranshahi,
Volume 14, Issue 2 (5-2020)
Abstract
Background and Aim: Studies have shown that non-steroid anti-inflammatory drugs have an effect on cancer cells of digestive system, however, the cellular and molecular mechanism of the non-steroidal anti-inflammatory drugs and their effects on the proliferation of gastrointestinal cancer cells is unclear in many cases. The aim of this study was to investigate the effects of cytotoxic dose of tolmetin on BAX and BCL2 genes expression level in gastric cancer cells (AGS).
Materials and Methods: In this laboratory-experimental study, AGS cells were purchased from Pasture institute and divided into control group and groups exposed to different concentrations of tolmetin. MTT assay was used to measure cytotoxic effects of tolmetin. Real-time PCR was used to evaluate BAX and BCL2 genes expression levels. The data were statistically analyzed between groups using ANOVA.
Results: Higher decrease in relative expression level of anti-apoptotic BCL2 was observed than expression level of apoptotic BAX gene in AGS cells exposed to IC50 concentration of tolmetin.
Conclusion: The results of this study indicated that tolmetin can induce apoptosis in gastric cancer cells by decreasing of anti-apoptotic BCL2 gene expression level. Therefore, consideration might be given to tolmetin in treatment of gastric cancer.
Saeid Mirzaeian, Khalil Khashei Varnamkhasti,
Volume 15, Issue 2 (5-2021)
Abstract
Background and Aim: Breast cancer is one of the most common types of cancer and the second leading cause of cancer death in women. The effect of ligustilide - isolated from the Kelussia on MCF-7 breast cancer cell line compared with human fibroblast cell line (HDF1BOM) was evaluated in the present study.
Materials and Methods: MCF-7 and HDF1BOM cell lines were treated for 48 and 72 hours with different concentrations (0, 50, 100, 150 and 200 mg/ml) of Z-ligustilide ((ligustilide (Z)-3-butylidene-4,5-dihydrophthalide)). Then, bioavailability was analyzed by ELISA reader using MTT kit and Apoptosis was assessed by flow cytometry using an Annexin V-FITC/PI kit in two times. Statistical analysis was accomplished by ANOVA and Huynh-Feldt tests using SPSS and FlowJo software.
Results: The results of MTT test showed reduce bioavailability of MCF-7 cell line in all concentrations (from 70.60% in 50 mg/ml to 6.80% in 200 mg/ml (for 48 h of treatment), from 61.95% in 50 mg/ml to 5.84% in 200 mg/ml (for 72 h of treatment)). Also, the results of the Annexin test showed that the induction of apoptosis is not time and concentration dependent manner, and it had increased in most groups. highest percentage of apoptosis were; 98.3% in 50 mg/ml (for 48 h of treatment), and 97.4 % in 100 mg/ml (for 72 h of treatment). The results of MTT test showed reduce bioavailability of HDF1BOM cell line in both times compared to the control group (from 97.24% in 50 mg/ml to 5.97% in 200 mg/ml (for 48 h of treatment), from 90.93% in 50 mg/ml to 5.26% in 200 mg/ml (for 72 h of treatment)). Also, according to the results of Annexin, early apoptotic cells show a higher percentage (4.21% in 150 mg/ml (for 48 h of treatment), 1.67% in 200 mg/ml (for 72 h of treatment)). Ligustilide did not show considerable cytotoxicity in HDF1BOM cells.
Conclusion: Due to the fact that ligustilide has an inhibitory effect on the growth, proliferation and invasion of cancer cells by inducting apoptosis, it seems that ligustilide can be used to reduce cell proliferation of breast cancer.
Khalil Khashei Varnamkhasti, Leila Rouhi, Mehdi Aalmomen,
Volume 15, Issue 3 (8-2021)
Abstract
Background and Aim: Colorectal adenocarcinoma is one of the common causes of death due to weak response to common therapies. In this study, the effect of citric acid on bioavailability and apoptosis of the human colorectal adenocarcinoma cell line (HT29) was examined. Citric acid is a naturally organic acid that commonly found in citrus and is considered as a physiological inhibitor of enzymes involved in glycolysis pathway to remove cancer cells.
Materials and Methods: In this study, HT-29 colorectal adenocarcinoma cancer cells were cultured in DMEM medium with 10% bovine serum. The cells were treated in 400, 800 and 1600 μg/ml concentrations of citric acid and incubated at 24, 48 and 72 hours respectively. Cell growth was analyzed by MTS kit and apoptosis was analyzed three times by flow- cytometry using an Annexin V-FITC/PI kit according to the manufacturers protocol.
Results: The results of bioavailability of treated HT-29 cells with different concentrations (400, 800 and 1600 μg/ml) of citric acid, after trinary incubation time (24, 48 and 72 hours) using the MTS assay showed that, bioavailability of HT-29 cell line decreased at all concentrations of citric acid in a time dependent manner. Also, the results of the apoptosis induction in treated HT-29 cell line with different concentrations (400, 800 and 1600 μg/ml) of citric acid, after trinary incubation time (24, 48 and 72 hours) using Annexin V-FITC/PI test showed that the percentage of the early and late apoptosis cells increased with increasing citric acid concentration and incubation time, which increased the percentage of apoptosis compared to the control group is significant in all three times of 24, 48 and 72 hours.
Conclusion: The results indicate that citric acid can reduce the bioavailability of colorectal adenocarcinoma cells by inducing apoptosis pathway.
