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Showing 12 results for Apoptosis
Adel Spotin, Monireh Mokhtari Amirmajdi , Mojtaba Sankian, Abdolreza Varasteh, Ali Akbar Shamsian, Fatemeh Vahedi ,
Volume 12, Issue 1 (4-2012)
Background & objectives: Hydaticosis is a zoonotic helminthic disease of human and other intermediated hosts in which larval stages of the tapeworm Echinococcus granulosu transfect human. The liver and lung are the host tissues for the hydatid cyst . It is unknown which mechanisms are involved in infertility of the cyst and suppression of the fertile cyst. This study was aimed to evaluate the expression of the apoptosis inducing-ligands such as TRAIL and Fas-L in germinal layer of the cyst and human normal tissue surrounding the cyst that is one of the unknown host innate immunity mechanisms against the hydatid cyst.
Methods: In this study, four isolated hydatid cysts were used which had been diagnosed in patients by radiography and parasitological examination in Mashhad Ghaem hospital. Furthermore, the germinal layer of the cyst and accompanied normal peripheral tissues were separated by scalpel in sterile conditions. After homogenization, expression of TRAIL and Fas-L genes were studied by semi-quantitive RT-PCR method.
Results: The TRAIL and Fas-L showed significant higher level expression in germinal layer of infertile cyst than the fertile cyst and host normal tissues.
Conclusion: The host tissue-induced apoptosis of germinal layer of the fertile cysts is probably one of the infertility mechanism in patients with hydaticosis
A Mohammadi, B Baradaran,
Volume 15, Issue 3 (9-2015)
Background & objectives: Cancer is one of the most causes of mortality in worldwide. Components derived from natural plants that induce apoptosis are used for cancer treatment. Therefore investigation of different herbal components for new anti-cancer drug is one of the main research activities throughout the world. According to low cost, oral consumption and easy access to the public extracts of Urtica dioica, in this study we aimed to investigate the effectiveness of this herb on MDA-MB-468 breast cancer cells.
Methods: Cytotoxic effect of Urtica dioica extract was measured using MTT assays. To show induction of apoptosis by this plant TUNEL and DNA Fragmentation test were performed.
Results: In the present study dichloromethane extracts noticeably killed cancer cells. IC50 values related to human breast adenocarcinoma cell line MDA-MB-468 were 29.46±1.05 µg/ml in 24 hours and 15.54±1.04 µg/ml in 48 hours. TUNEL test and DNA Fragmentation assay showed apoptotic characteristic in the extract treated cells.
Conclusion: The results showed that MDA-MB-468 cells after treatment with dichloromethane extract of Urtica dioica, induces apoptosis in MDA-MB-468 cancer cells which may be useful in the treatment of cancer.
Zahra Kiasalari, Mehrdad Roghani, Tourandokht Baluchnejadmojarad, Athar Abdolrazaghnezhad,
Volume 16, Issue 1 (4-2016)
Background & objectives: Temporal lobe epilepsy is associated with neuronal apoptosis. Curcumin has antioxidant and anticonvulsant activities, therefore this study was conducted to assess involvement of Bax and Bcl2 in protective effect of curcumin in epileptic rats.
Methods: 28 rats were divided into sham, curcumin-pretreated sham, epileptic (kainate), and curcumin-pretreated epileptic groups. Experimental model of epilepsy was induced by intrahippocampal administration of kainic acid. Rats received curcumin at a dose of 100 mg/kg. Finally, Nissl staining and Bax and Bcl2 immunohistochemistry were conducted on hippocampal sections and data were analyzed using one-way ANOVA and unpaired t-test. The p-value less than 0.05was considered statistically significant.
Results: Induction of epilepsy was followed by a significant seizure and curcumin pretreatment significantly reduced seizure intensity (p<0.01). In addition, there were no significant differences between the groups in Nissl staining of CA3 area neurons. In addition, Bax positive neurons were observed in CA3 area in kainate group and significantly decreased in curcumin pretreated rats (p<0.05). Meanwhile, Bcl2 positive neurons were also moderately observed in kainate group and curcumin pretreatment significantly increased it (p<0.05).
Conclusion: Curcumin pretreatment exhibits anticonvulsant activity in epileptic rats. It also decreases the expression of pro-apoptotic protein Bax and significantly enhances the expression of anti-apoptotic protein Bcl2 and hence could reduce neuronal apoptosis.
Shima Khajouee Ravari , Behzad Baradaran,
Volume 16, Issue 2 (7-2016)
Background & objectives: Prostate cancer is one of the main reasons of death between men. Although there are many methods for treatment of this cancer but most of the patients still are died of the postoperative recurrence and metastasis of disease. Over expression of HMGA2 gene was observed in many human malignancies such as colorectal cancer, thyroid, pancreatic carcinoma and lung cancers. The aim of this study was to investigate the effect of HMGA2 specific small interfering RNAs (siRNAs) on viability and apoptosis in PC3 prostate adenocarcinoma cell line.
Methods: siRNA transfection was performed with liposome approach. The cytotoxic effects of siRNA were determined using MTT assay on the PC3 cells and apoptosis was quantified using TUNEL assay.
Results: Transfection with siRNA significantly suppressed the expression of HMGA2 gene in dose dependent manner after 48 hours resulting in spontaneous apoptosis. Moreover, siRNA transfection had effects on prostate cancer cells viability.
Conclusion: Our results suggest that the HMGA2 specific siRNA effectively decreases prostate cancer cells viability and induces apoptosis in this cell line. Therefore it can be considered as a potent adjuvant in prostate cancer therapy.
Ameneh Basiri, Maryam Pashaiasl,
Volume 16, Issue 3 (10-2016)
Background & objectives: Among gynecologic malignancies, endometrial cancer is the fourth most frequent cause of cancer death all over the world. Paclitaxel is one of the chemotherapy regimens that is used against this cancer. Treatment of tumor with Paclitaxel induces apoptosis, but it is also associated with serious side effects. Thus, it is imperative to search for more effective and safer chemotherapeutic regimens. Silibinin is a milk thistle plant extract that its antioxidant effects against some cancers have been studied. The aim of this study was to examine the effect of Paclitaxel and Silibinin combination on endometrial cancer cell line (Hela).
Methods: Hela cell line was cultured in 25cm2 flask in RPMI-1640 medium supplemented with 10% fetal bovine serum (FBS). Then the numbers of live cells were calculated with trypan blue staining method and then the cells were seeded in to 96-well flat-bottomed culture plates and treated with Silibilin, Paclitaxel and Paclitaxel plus Silibilin together with the control without treatment. MTT assay was used to evaluate cytotoxicity of different treatments.
Results: After 48 hours of treatment, Paclitaxel and Silibilin combination inhibited cell growth significantly compared with the other groups (p<0.05).
Conclusions: It is indicated that combination of Paclitaxel and Silibilin can affect the growth arrest of Hela cancer cell line more effective than other treatments and is needed to be examined in vitro.
Maryam Salem , Tooba Mirzapour, Aboulfazl Bayrami, Mohsen Sagha, Asadollah Asadi,
Volume 17, Issue 1 (4-2017)
Background & objectives: According to importance of bone marrow mesenchymal stem cells in production of different cell lines, transplantation of these cells are used for treatment of many different diseases during cell therapy. Viability and proliferation of these cells after transplantation are very important. Since infertility is as public health problem in men and women, the scientists attempt to produce germ cells from differentiation of stem cells. It is supposed to use these cells for treatment of different illnesses especially for men with lack of germ cells in testes in future. However, in using stem cells for cell therapy the culture medium should be designed to increase the number of cells and efficiency of transplantation and to guarantee the health of the cells in terms of DNA damage. This study designed a suitable culture medium in order to increase the number of colonies and decrease the cell injuries.
Methods: In this study mesenchymal stem cells isolated from bone marrow of mice and exposed to retinoic acid (RA) with concentration of 10-6 M and Sertoli cells condition medium. Since mesenchymal stem cells (MSCs) produce fibroblastic colonies so the number of colonies was counted every 3 days after culture (days of 2, 5, 8, 11, and 15) under inverted microscope. The staining of ethidium bromide-acridine orange was also done for determination of apoptotic nucleus in days of 10 and 15 after culture.
Results: The results showed that the effects of retinoic acid on grow and viability of MSCs is related to the time. It seems that RA increased the proliferation of the cells and the number of colonies increased in low time but the apoptotic cells elevated with increasing the time of culture. Condition medium of Sertoli cells also increased the proliferation of bone marrow stem cells.
Conclusion: According to proliferative properties of condition medium, it seems that using condition medium together with RA is better than RA alone for differentiation of MSCs to germ cells.
Faranak Hasanpour, Kamaleddin , Hamidi , Saber Zahri, Saeeid Latifi Navid ,
Volume 17, Issue 2 (7-2017)
Background & Objectives: Breast cancer is one of the most common cancers of women in the world. Apoptotic pathway is one of the most important pathways to deal with cell damage, especially cancer, which is usually blocked in this disease. One of the main enzymes to set up this pathway is JNK (1,2,3α,3β), which is activated by cellular stress.
Methods: In this study, breast cancer cells with the origin of MCF-7 cell lines were cultured in RPMI medium using 10%fetal bovine serum.Then , they were subjected to heat (42 & 45 ̊ C) for 1,2,4,6 and 8 hours under X-ray and γ-ray radiations for 1,2,3 and 4 hours as well. Their viability and enzyme level were evaluated by MTT and ELISA tests, respectively.
Results: The obtained results showed that abiotic stresses including heat and radiations resulted in JNK level increase and recovery of apoptosis pathway function in breast cancer cells. In addition, they led to decreased of cell viability and increase of JNK level depending on the duration and kind of stress.
Conclusion: The results in this study showed abiotic stress directly affected the JNK level. Increase of this enzyme in the cell resulted in activity of JNK apoptosis pathway. We hope to find methods to help to cancer treatment by means of more studies on JNK enzyme and relevant pathways.
Zynab Bargeshadi , Yaghoub Pazhang,
Volume 17, Issue 4 (1-2018)
Background & objectives: Cancer is one of the leading causes of morbidity and mortality worldwide. Leukemia is a cancer of blood cells and bone marrow, which is characterized by abnormal growth of white blood cells, known as blasts. Chronic myeloid leukemia is a clonal hematopoietic stem cell disorder that accounts for 15-20 percent of adult leukemia. Embelin, a natural compound found in the fruit of Embeliaribes plant, has low toxicity and potent anticancer properties. Several studies have shown that the anticancer properties of Embelin are due to inhibition of XIAP (X-linked inhibitor of the apoptosis protein) and modulation of NF-kB signaling pathway. The aim of this study was to investigate the effect of Embelin on the growth and apoptosis of K562 cell line.
Methods: K562 cells were cultured in RPMI-1640 medium containing 10 % FBS and 1% penicillin. Then, the cells were treated with different concentrations of Embelin (2, 4, 6, 8 μM/ml) for 72 hours. MTT assay was used to determine the viability of cells. Hoechst staining and DNA electrophoresis were used for apoptosis analysis.
Result: Based on the results of MTT assay, Embelin inhibited the viability of K562 cells. The results of Hoechst staining showed that DNA fragmentation was increased in the treated cells. DNA electrophoresis analysis revealed that Embelin induced apoptosis.
Discussion: As the results showed, Embelin inhibited the cell growth and induced apoptosis in K562 cells time- and dose-dependently. Therefore, Embelin may be a candidate for treatment of chronic myeloid leukemia.
Saeid Dabagh Nikukheslat , Gholamreza Hamidian, Mostafa Khani , Saeid Fathollahi, Roghaye Jolusian,
Volume 17, Issue 4 (1-2018)
Background & objectives: The purpose of this study was to investigate the effect of endurance swimming exercise training on structural remodeling (volume and parenchymal cell number) and apoptotic index of adrenal gland in pregnant rats exposed to cadmium poisoning.
Methods: A total of 32 pregnant rats weighing 200 ± 20 g were randomly divided into four groups of control, cadmium, swimming, and cadmium-swimming. Cadmium dissolved in drinking water was administered to treatment groups, available ad libitum during pregnancy. Swimming exercises 5 days/week and 60 min/day were performed from the first day of gestation until the end of the period. Two days after delivery, the mothers were sacrificed and their adrenal glands were removed. After stabilizing the samples, Hematoxylin-Eosin staining and TUNEL assay were performed, and the number of necrotic and apoptotic cells in 10 microscopic fields was counted randomly. The size of various regions of the adrenal gland and total number of parenchymal cells were estimated using stereological methods. Data were analyzed by two-way ANOVA under SPSS software (version 21).
Results: Cadmium poisoning caused extensive bleeding and tissue destruction in the adrenal gland of the pregnant mothers, but endurance training reduced the amount of bleeding. Cadmium poisoning during pregnancy decreased the total volume of the gland, the volume of the cortical part and its different layers as well as the number, size and function of parenchymal cells in all three cortical zones, especially the fasciculata zone. Performing swimming exercise training in this condition worsened the structural state of the gland and led to a further reduction in the number of parenchymal cells within all three parts of the adrenal gland.
Conclusion: Exercise training in determined intensity increased the structural and morphological complications of cadmium toxicity in the adrenal gland of pregnant rats. So, pregnant mothers are advised to use low-intensity exercises and trainings.
Taktam Sadat Vafa , Mojdeh Emadi , Seyed Damoon Sadoughi,
Volume 18, Issue 1 (4-2018)
Background & objectives: Curcumin has antioxidant properties. The aim of this study was to determine the effect of curcumin on bax, bcl-2, antioxidant enzymes and lipid peroxidation of sperm after freezing procedure.
Methods: In this experimental study, semen samples were collected from four mature Holstein bulls, twice a week in eight innings. Semen samples were divided into four groups. Zero (control), 10 (Experimental group one), 20 (Experimental group two) and 30 (Experimental group three) mg/ml of curcumin with diluents were added to the semen samples. After thawing, Bax, Bcl-2 and malondialdehyde levels as well as superoxide dismutase, glutathione peroxidase and catalase enzymes were measured in sperm samples using ELISA.
Results: According to the results, Bcl-2, superoxide dismutase, glutathione peroxidase and catalase levels in sperm samples treated with 20 and 30 mg/ml curcumin significantly increased and Bax and malondialdehyde levels significantly decreased compared to control groups (p<0.05). This difference was not significant for sperm samples treated with 10 mg/ml curcumin.
Conclusion: Dose-dependent administration of curcumin decreased oxidative stress and lipid peroxidation and increased anti-apoptosis proteins in freeze-thawing sperms.
Mitra Rabiei, Gholamreza Zarrini, Majid Mahdavi,
Volume 18, Issue 2 (7-2018)
Background & objectives: Colorectal cancer is one of the most common cancers in the world. Much attention has been given to nutritional supplements that can alter intestinal flora as factors preventing colon cancer. Research has shown that lactic acid bacteria in foods are potentially capable of inducing apoptosis. In this regard, the most focus has been on Lactobacillus genus. This study, investigated the cytotoxic effect of metabolites of isolated strain from Azerbaijan traditional cheeses on HCT116 colorectal cancer cells.
Methods: In this cross-sectional study, after collecting samples of traditional "Lighvan" and "jug" cheeses in the region of Azerbaijan, MRS medium was used for isolation of lactobacilli. The isolates were identified by biochemical and molecular approaches after primary confirmation. The metabolites were produced in MRS broth, and their supernatants were separated. The inhibitory effect of the supernatants of the isolates on HCT116 cancer cells was studied and their effects were evaluated by microscopy and MTT assay.
Results: In this study, three isolates of "Lighvan" and sixteen isolates of "jug" cheeses were obtained. The results of anticancer activity showed that the supernatants of the isolates CT2 and JT1 had a significant anticancer effect on HCT116 cancer cells (p˂0.05). Identification of the isolates CT2 and JT1 showed 99% and 96% similarity with Lactobacillus brevis, respectively.
Conclusion: Lactobacilli in Azerbaijan traditional dairy products have a significant value in terms of anticancer properties.
Navideh Haghnavaz, Faezeh Asghari, Zeynab Sattari, Monire Babaei, Tohied Kazemi,
Volume 18, Issue 4 (3-2019)
Background & objectives: Breast cancer is one of the most important cancers in women worldwide. Taxol as a chemotherapeutic agent, is used for treatment of breast cancer.The aim of this study was to investigate alterations in the expression of mir-1246 and mir-224 in four breast cancer cell lines after Taxol treatment with the goal of introducing them as a biochemical marker for determining response or resistance of breast cancer to the Taxol therapy.
Methods: In this in vitro study, four breast cancer cell lines including MCF-7, MDA-MB-231, SKBR-3 and BT-474 were cultured in RPMI1640 medium supplemented with 10% FBS and antibiotics. Then, MTT assay was performed to determine IC50 concentration of Taxol. Cells were treated for 24 hours and then RNA extraction and cDNA synthesis were performed. Alterations in the expression level of mir-1246 and mir-224 were quantitated using qRT- PCR.
Results: After treatment with Taxol, the expression level of mir-1246 was significantly up-regulated in two HER2-overexpressing cell lines, BT-474 (113 fold) and SKBR-3 (1.4 fold), and down-regulated in two HER2-negative cell lines, MCF-7 (45.5 fold) and MDA-MB-231 (7.7 fold). Expression of mir-224 was detected only in two cell lines including SKBR-3 and MDA-MB-231, and was down-regulated after treatment with Taxol (2.1 and 17.2 fold, respectively).
Conclusions: According to the different pattern of alteration in the expression level of mir-1246 in HER2-overexpressing breast cancer cell lines compared to HER2-negative cell lines after treatment with Taxol, this miRNA could be a useful biomarker for responsiveness to Taxol in different types of HER2-positive and -negative breast cancers.