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کاربرد نوع شرط:
- جایگاه : پژوهشی
- مجله: Nanomedicine Journal
- نوع مقاله: Journal Article
- کلمات کلیدی: Gold nanoparticles,Colon cancer,Radiosensitizer,Gamma-H2AX,Megavoltage X-ray
- چکیده:
- چکیده انگلیسی: Objective(s): Taking advantage of high atomic number of gold nanoparticles (GNPs) in radiation dose absorbing, many in vitro and in vivo studies have been carried out on using them as radio-sensitizer. In spite of noticeable dose enhancement by GNPs at keV energies, using this energy range for radiotherapy of deep-seated tumors is outdated. The aim of the present work was to examine the effect of GNPs on radio-sensitivity of HT-29 cells in combination with 18 MV X-rays.
Materials and Methods: GNPs were synthesized using a seed-growth method and characterized by transmission electron microscopy (TEM) for size and morphology. Cytotoxicity effect of the GNPs as well as amount of uptake into the HT-29 cell line was assessed. Irradiation was done by 18 MV photons. Immuno-fluorescent imaging of γ-H2AX foci and clonogenic assay were conducted to find out the effect of the GNPs on radio-sensitivity of the cells.
Results: The size of GNPs was about 24 nm with a spherical-like shape. Treatment of the cells with the GNPs induced insignificant inhibition in cell growth. Cellular uptake reaches a maximum after 12 h incubation with GNPs. Stained γ-H2AX foci showed a significant difference in number and intensity for GNPs treated cells compared to only irradiated one. Moreover, colony formation assay proved an impressive decrease in the number of colonies for the irradiated+GNPs group rather than the other one. By fitting the survival fraction data on the linear-quadratic model, sensitization enhancement factor (SER) of 1.25 was achieved.
Conclusion: Although theoretical studies predicted negligible radio-enhancement factor for GNPs at high megavoltage energies, present results show the potential of GNPs for possible gold nanoparticle-aided radiation therapy (GNRT) even for high MV photons.- انتشار مقاله: 04-11-1396
- نویسندگان: Mansour Zabihzadeh,Mojtaba Hoseini-Ghahfarokhi,Vahid Bayati,Ali Teimoori,Zahra Ramezani,Mohamad-Ali Assarehzadehgan,Morteza Pishghadam
- مشاهده
- جایگاه : پژوهشی
- مجله: Nanomedicine Journal
- نوع مقاله: Journal Article
- کلمات کلیدی: Gold nanoparticles,Colon cancer,Radiosensitizer,Gamma-H2AX,Megavoltage X-ray
- چکیده:
- چکیده انگلیسی: Objective(s): Taking advantage of high atomic number of gold nanoparticles (GNPs) in radiation dose absorbing, many in vitro and in vivo studies have been carried out on using them as radio-sensitizer. In spite of noticeable dose enhancement by GNPs at keV energies, using this energy range for radiotherapy of deep-seated tumors is outdated. The aim of the present work was to examine the effect of GNPs on radio-sensitivity of HT-29 cells in combination with 18 MV X-rays.
Materials and Methods: GNPs were synthesized using a seed-growth method and characterized by transmission electron microscopy (TEM) for size and morphology. Cytotoxicity effect of the GNPs as well as amount of uptake into the HT-29 cell line was assessed. Irradiation was done by 18 MV photons. Immuno-fluorescent imaging of γ-H2AX foci and clonogenic assay were conducted to find out the effect of the GNPs on radio-sensitivity of the cells.
Results: The size of GNPs was about 24 nm with a spherical-like shape. Treatment of the cells with the GNPs induced insignificant inhibition in cell growth. Cellular uptake reaches a maximum after 12 h incubation with GNPs. Stained γ-H2AX foci showed a significant difference in number and intensity for GNPs treated cells compared to only irradiated one. Moreover, colony formation assay proved an impressive decrease in the number of colonies for the irradiated+GNPs group rather than the other one. By fitting the survival fraction data on the linear-quadratic model, sensitization enhancement factor (SER) of 1.25 was achieved.
Conclusion: Although theoretical studies predicted negligible radio-enhancement factor for GNPs at high megavoltage energies, present results show the potential of GNPs for possible gold nanoparticle-aided radiation therapy (GNRT) even for high MV photons.- انتشار مقاله: 04-11-1396
- نویسندگان: Mansour Zabihzadeh,Mojtaba Hoseini-Ghahfarokhi,Vahid Bayati,Ali Teimoori,Zahra Ramezani,Mohamad-Ali Assarehzadehgan,Morteza Pishghadam
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Basic Medical Sciences
- نوع مقاله: Journal Article
- کلمات کلیدی: LPS,Hemodynamic parameters,Nrf2,p-Coumaric acid,ECG,ALI
- چکیده:
- چکیده انگلیسی: Objective(s): Acute lung injury (ALI) has a high mortality rate and is characterized by damage to pulmonary system giving rise to symptoms such as histological alteration, lung tissue edema and production of proinflammatory cytokine. p-Coumaric acid (p-CA), as a phenolic compound, that is found in many types of fruits and vegetables has been reported to exhibit a therapeutic effect in several inflammatory disorders. The aim of our study was evaluation of pretreatment with p-CA against heart dysfunction, oxidative stress and nuclear factor-erythroid 2 -related factor 2 (Nrf2) modifications following lipopolysaccharide (LPS)-induced acute lung inflammation.
Materials and Methods: The rats were divided into four groups (n=8): Control, LPS (5 mg/kg, it), p-CA (100 mg/kg, IP), and LPS+pCA. Inflammatory response and oxidative stress were evaluated by measurement of interleukin 6 (IL-6), tumor necrosis factor alpha (TNF-α) and malondialdehyde (MDA) levels in heart tissue. For evaluation of the effect of LPS on cardiac response, electrocardiography (ECG) and hemodynamic parameters were recorded.
Results: A significant increase in lipid peroxidation (P<0.001, cytokine parameters (TNF-α and IL-6 (P<0.01), gene expression of Nrf2 (P<0.05), and antioxidant activity of superoxide dismutase and glutathione (P< 0.05) in addition to glutathione peroxidase (P<0.01) was demonstrated in heart tissue of ALI rats. LPS can impair cardiac function (in in vitro measurement of hemodynamic parameters by using Langendorff setup, and in in vivo measurement of ECG parameters), and pretreatment with p-CA recovered these parameters to control levels in heart. Pretreatment with p-CA causes modulation of cytokines and MDA level that protected cardiac injury caused by LPS in ALI model.
Conclusion: Our results showed anti-inflammatory and antioxidative effect of p-CA on LPS-induced ALI.- انتشار مقاله: 08-09-1397
- نویسندگان: Maryam Kheiry,Mahin Dianat,Mohammad Badavi,Seyyed Ali Mard,Vahid Bayati
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Basic Medical Sciences
- نوع مقاله: Journal Article
- کلمات کلیدی: LPS,Hemodynamic parameters,Nrf2,p-Coumaric acid,ECG,ALI
- چکیده:
- چکیده انگلیسی: Objective(s): Acute lung injury (ALI) has a high mortality rate and is characterized by damage to pulmonary system giving rise to symptoms such as histological alteration, lung tissue edema and production of proinflammatory cytokine. p-Coumaric acid (p-CA), as a phenolic compound, that is found in many types of fruits and vegetables has been reported to exhibit a therapeutic effect in several inflammatory disorders. The aim of our study was evaluation of pretreatment with p-CA against heart dysfunction, oxidative stress and nuclear factor-erythroid 2 -related factor 2 (Nrf2) modifications following lipopolysaccharide (LPS)-induced acute lung inflammation.
Materials and Methods: The rats were divided into four groups (n=8): Control, LPS (5 mg/kg, it), p-CA (100 mg/kg, IP), and LPS+pCA. Inflammatory response and oxidative stress were evaluated by measurement of interleukin 6 (IL-6), tumor necrosis factor alpha (TNF-α) and malondialdehyde (MDA) levels in heart tissue. For evaluation of the effect of LPS on cardiac response, electrocardiography (ECG) and hemodynamic parameters were recorded.
Results: A significant increase in lipid peroxidation (P<0.001, cytokine parameters (TNF-α and IL-6 (P<0.01), gene expression of Nrf2 (P<0.05), and antioxidant activity of superoxide dismutase and glutathione (P< 0.05) in addition to glutathione peroxidase (P<0.01) was demonstrated in heart tissue of ALI rats. LPS can impair cardiac function (in in vitro measurement of hemodynamic parameters by using Langendorff setup, and in in vivo measurement of ECG parameters), and pretreatment with p-CA recovered these parameters to control levels in heart. Pretreatment with p-CA causes modulation of cytokines and MDA level that protected cardiac injury caused by LPS in ALI model.
Conclusion: Our results showed anti-inflammatory and antioxidative effect of p-CA on LPS-induced ALI.- انتشار مقاله: 08-09-1397
- نویسندگان: Maryam Kheiry,Mahin Dianat,Mohammad Badavi,Seyyed Ali Mard,Vahid Bayati
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Basic Medical Sciences
- نوع مقاله: Journal Article
- کلمات کلیدی: Antioxidants,Melatonin,Sperm,Testosterone,Acetylsalicylic acid,Epididymis
- چکیده:
- چکیده انگلیسی: Objective(s): In this study, effects of encapsulated umbilical cord stem cells (UCSCs)-derived hepatocyte-like cells (HLCs) in high mannuronic alginate scaffolds was investigated on CCl4-induced acute liver failure (ALF) in rats.
Material and Methods: UCSCs were encapsulated in high mannuronic alginate scaffolds. Then the UCSCs differentiated into HLCs for treatment of CCl4-induced ALF in rats. Thirty rats randomly divided into 5 groups: Intoxicated group received only CCl4 to induce ALF. In other groups including cell-free, UCSCs and HLCs, alginate scaffolds were transplanted into the liver 4 days after CCl4 injection. Biochemical markers including albumin (ALB), blood urea nitrogen (BUN), alanine aminotransferase (ALT), aspartate aminotransferase (AST), and alkaline phosphatase (ALP) were evaluated. Histological changes and gene expression of ALB, alpha-fetoprotein (AFP), and cytokeratin 18 (CK-18) were also assessed.
Results: Expression of CK-18 significantly increased in HLCs compared to the UCSCs in vitro. This indicates that UCSCs can effectively differentiate into the HLCs. In CCl4-intoxicated group, BUN, AST and ALT levels, and histological criteria, such as infiltration of inflammatory cells, accumulation of reticulocytes, nuclear pyknosis of hepatocyte and sinusoidal dilation, significantly increased. In this group, ALB secretion significantly decreased, while AFP expression significantly increased. Both UCSCs and HLCs encapsulated in alginate scaffolds effectively attenuated biochemical tests, improved liver cytoarchitecture, increased expression of ALB and reduced AFP expression.
Conclusion: Finding of the present study indicated that encapsulation of UCSCs or HLCs in alginate mannuronic scaffolds effectively improve CCl4-induced ALF.- انتشار مقاله: 15-09-1396
- نویسندگان: Negar Varaa,Saeed Azandeh,Layasadat Khorsandi,Darioush Bijan Nejad,Vahid Bayati,Amin Bahreini
- مشاهده
- جایگاه : پژوهشی
- مجله: Avicenna Journal of Phytomedicine
- نوع مقاله: Journal Article
- کلمات کلیدی: LPS,p-Coumaric acid,Acute lung injury,miRNA 146a,Cardiac inflammation
- چکیده:
- چکیده انگلیسی: Objective: In cardiovascular diseases, inflammatory response plays an important role and affects heart function. As a flavonoid compound, p-coumaric acid (pCA), commonly exists in many fruits and vegetables and has a therapeutic effect on inflammatory diseases due to its anti-inflammatory properties. The purpose of the present study was to investigate pCA anti-inflammatory effect and the miRNAs (miRs) signaling pathway involved in cardiac inflammation following lipopolysaccharide-induced acute lung injury (ALI).
Material and Methods: Thirty-two Sprague-Dawley male rats were divided into 4 groups: control (received saline for 10 days, i.p.), LPS (received saline for 10 days+5 mg/kg LPS on day 8, intratracheally), pCA (received pCA 100 mg/kg for 10 days, ip), and LPS+pCA (received LPS+pCA). The level of IL-1β, IL-18 in heart tissue and IL-1β in bronchoalveolar lavage fluid (BALF) was determined by ELISA kits. Also the level of lactate dehydrogenase (LDH) in heart tissue and myeloperoxidase (MPO) in lung tissue were measured, and pCA effect on miR- 146a in heart tissue was analyzed.
Results: Data showed that 100 mg/kg of pCA significantly suppressed LDH activity (p<0.05), IL-18 (p<0.05) and IL-1β (p<0.01) level in heart tissue. Also, in BAL, IL-1β and MPO levels were significantly reduced (p<0.001). Finally, pCA modulated activation of miR-146a (p<0.05) in LPS -induced cardiac injury.
Conclusion: These findings indicated that LPS causes cardiac dysfunction and pre-treatment with pCA, as an anti-inflammatory agent, improved cardiac inflammation through modulation of miR-146a, and reducing cytokines and LDH activity.- انتشار مقاله: 19-12-1397
- نویسندگان: Maryam Kheiry,Mahin Dianat,Mohammad Badavi,Seyed Ali Mard,Vahid Bayati
- مشاهده
- جایگاه : پژوهشی
- مجله: Asian Pacific Journal of Cancer Prevention
- نوع مقاله: Journal Article
- کلمات کلیدی: Colon cancer,Electroporation,Irradiation,Radiosensitizing
- چکیده:
- چکیده انگلیسی: Background: The efficiency of radiotherapy for tumors can be enhanced with different radiosensitizers. Previous
studies have shown that electroporation (EP) can sensitize some cancer cell lines to ionizing radiation (IR). HT-29
is a radiation resistant colorectal cancer cell line, representative of a cancer type which is the second cause of cancer
mortalities in developed countries. The present study aimed to evaluate radiosensitizing effects of EP on HT-29 cells
in vitro exposed to 6 MV X-ray photon beams. Methods: HT-29 cells were exposed to a 6 MV X-ray photon beam
as the control or to a combination of electroporation and irradiation. The response of cells was evaluated by colony
formation assay and survival curves. Results: The survival fraction of the HT-29 cells was significantly decreased by
electroporation prior to radiotherapy. A single electric pulse increased colorectal HT-29 cancer cell sensitivity to megavoltage
radiation by a factor of 1.36. Conclusion: Our findings showed that EP before radiotherapy can significantly
enhance tumor cell sensitivity. This combined treatment modality should be assessed for its applicability in clinic settings
for employment against radioresistant cancers. However, to facilitate achieving this goal, many different tumors with
a broad range of radiosensitivities should be evaluated.- انتشار مقاله: 14-05-1396
- نویسندگان: Ali Yadollahpour,Zohre Rezaee,Vahid Bayati,Mohammad Javad Tahmasebi Birgani,Fereshteh Negad Dehbashi
- مشاهده