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Effect of Water Stress on Freezing Tolerance of Mexican Lime (Citrus aurantifolia L.) Seedlings
Reza Fotouhi Ghazvini,Mohammad Reza Baghbanha,Abdollah Hatamzadeh,Mokhtar Heidari 한국원예학회 2008 Horticulture, Environment, and Biotechnology Vol.49 No.5
Mexican lime (Citrus aurantifolia L.) is the most sensitive citrus plant to freezing. To study the effect of water stress on development of freezing tolerance of lime seedlings, changes of chlorophyll content, total soluble sugar, electrolyte leakage (EL), proline, and chlorophyll fluorescence parameters, as indicators of freezing damage were evaluated. The seedlings at the stage of 7-9 leaves were exposed to four levels of field capacity (FC) including 100%, 75%, 50%, and 25% FC. Then, water stressed plants were subjected to -2, -4, -6, and -8℃ freezing temperatures for 12 hours. The results showed an increase in EL and total soluble sugar during freezing stress, whereas chlorophyll content, efficiency of photosystem II (Fv/Fm), and electron transfer rate (ETR) considerably decreased. Within the water stressed treatments, 25% FC decreased EL to 71.5% of control, while chlorophyll content, soluble sugars, Fv/Fm, and ETR were significantly increased. Therefore, as a vital indicator, 25% FC water stress could improve freezing tolerance of lime seedlings.
Reza Heidari,Neda Esmailie,Negar Azarpira,Asma Najibi,Hossein Niknahad 한국독성학회 2016 Toxicological Research Vol.32 No.2
Sulfasalzine is a widely administered drug against inflammatory-based disorders in human. However several cases of liver injury are associated with its administration. There is no stabilized safe protective agent against sulfasalazine-induced liver injury. Current investigation was designed to evaluate if N-acetylcysteine (NAC) and dithioteritol (DTT) as thiol reducing agents and/or vitamins C and E as antioxidants have any protective effects against sulfasalazine-induced hepatic injury in an ex vivo model of isolated rat liver. Rat liver was canulated and perfused via portal vein in a closed recirculating system. Different concentrations of sulfasalazine and/or thiol reductants and antioxidants were administered and markers of organ injury were monitored at different time intervals. It was found that 5 mM of sulfasalazine caused marked liver injury as judged by rise in liver perfusate level of alanine aminotransferase (ALT), aspartate aminotransferase (AST), and lactate dehydrogenase (LDH) (p < 0.05). A significant amount of lipid peroxidation and hepatic glutathione depletion were detected in drug-treated livers, accompanied with significant histopathological changes of the organ. Administration of NAC (500 μM), DTT (400 μM), Vitamin C (200 μM), or vitamin E (200 μM) significantly alleviated sulfasalazine-induced hepatic injury in isolated perfused rat liver. The data obtained from current investigation indicate potential therapeutic properties of thiol reductants and antioxidants against sulfasalazine-induced liver injury.
Review : Factors affecting drug-induced liver injury: antithyroid drugs as instances
( Reza Heidari ),( Hossein Niknahad ),( Akram Jamshidzadeh ),( Narges Abdoli3 ) 대한간학회 2014 Clinical and Molecular Hepatology(대한간학회지) Vol.20 No.3
Methimazole and propylthiouracil have been used in the management of hyperthyroidism for more than half a century. However, hepatotoxicity is one of the most deleterious side effects associated with these medications. The mechanism(s) of hepatic injury induced by antithyroid agents is not fully recognized yet. Furthermore, there are no specific tools for predicting the occurrence of hepatotoxicity induced by these drugs. The purpose of this article is to give an overview on possible susceptibility factors in liver injury induced by antithyroid agents. Age, gender, metabolism characteristics, alcohol consumption, underlying diseases, immunologic mechanisms, and drug interactions are involved in enhancing antithyroid drugs induced hepatic damage. An outline on the clinically used treatments for antithyroid drugs-inducedhepatotoxicity and the potential therapeutic strategies found to be effective against this complication are also discussed. (Clin Mol Hepatol 2014;20:237-248)
Heidari, Reza,Esmailie, Neda,Azarpira, Negar,Najibi, Asma,Niknahad, Hossein Korean Society of ToxicologyKorea Environmental Mu 2016 Toxicological Research Vol.32 No.2
Sulfasalzine is a widely administered drug against inflammatory-based disorders in human. However several cases of liver injury are associated with its administration. There is no stabilized safe protective agent against sulfasalazine-induced liver injury. Current investigation was designed to evaluate if N-acetylcysteine (NAC) and dithioteritol (DTT) as thiol reducing agents and/or vitamins C and E as antioxidants have any protective effects against sulfasalazine-induced hepatic injury in an ex vivo model of isolated rat liver. Rat liver was canulated and perfused via portal vein in a closed recirculating system. Different concentrations of sulfasalazine and/or thiol reductants and antioxidants were administered and markers of organ injury were monitored at different time intervals. It was found that 5 mM of sulfasalazine caused marked liver injury as judged by rise in liver perfusate level of alanine aminotransferase (ALT), aspartate aminotransferase (AST), and lactate dehydrogenase (LDH) (p < 0.05). A significant amount of lipid peroxidation and hepatic glutathione depletion were detected in drug-treated livers, accompanied with significant histopathological changes of the organ. Administration of NAC ($500{\mu}M$), DTT (${400\mu}M$), Vitamin C ($200{\mu}M$), or vitamin E ($200{\mu}M$) significantly alleviated sulfasalazine-induced hepatic injury in isolated perfused rat liver. The data obtained from current investigation indicate potential therapeutic properties of thiol reductants and antioxidants against sulfasalazine-induced liver injury.
Reza Faramarzi Hafez,Bahram Heidari,Zeynab Shahabzadeh,Bahram. Heidari 한국작물학회 2013 Journal of crop science and biotechnology Vol.16 No.4
As a medicinal plant, the importance of evening primrose (Oenothera biennis L.) is due to its unsaturated fatty acids in the seedsand roots, and also oenotherine and comfarol in the leaves. Low germination and difficulties in seed production are the main problemsencountered with growing this plant in the field. As an alternative approach, an in vitro experiment was set up for the evaluationof evening primrose production via direct and indirect regeneration of the cultivars NC-1 and VNK. For callogenesis and directregeneration, the explants from the apical bud and petiole were cultured on MS medium supplemented with 0.25, 0.75, and 1.25 mgL-1 of both BAP and Kinetin (KIN). Indirect regeneration was performed by placing apical buds, petioles, and leaf explants on MSmedium supplemented with 0.5 and 1 mg L-1 2,4-D and 0.5, 1, and 1.25 mg L-1 of both BAP and KIN. The highest shoot inductionfrom direct regeneration was obtained with apical bud explants of VNK treated with 0.75 mg L-1 BAP. The highest callus weight(3.17 g) obtained from indirect regeneration was with petiole explants treated with 1 mg L-1 2, 4-D and 1 mg L-1 BAP in VNK cultivars. The highest number of torpedo embryogenic clusters (23.8) was obtained from the VNK petiole explants treated with 0.5 mg L-12, 4-D and 1.25 mg L-1 BAP. BAP had higher positive effects on in vitro production of evening primrose than KIN in both direct andindirect regeneration. In general, results indicated that VNK was more potent for regeneration than NC-1 and concentrations of 0.75mg L-1 BAP for direct and 0.5 mg L-1 2, 4-D and 1.25 mg L-1of BAP for indirect regeneration had a higher efficiency for increasing invitro production of evening primrose
Reza Heidary Moghadam,Afshar Shahmohammadi,Nader Asgari,Koorosh Azizi,Sahar Mehr Mansour,Mohammad Roozbahani 대한혈액학회 2018 Blood Research Vol.53 No.4
Coronary artery ectasia (CAE) is defined as the dilation of a segment of a coronary vessel to at least 1.5 times the diameter of its normal adjacent segment. Mean platelet volume (MPV) plays a role in acute coronary syndromes, with high MPV correlating to poor prog-nosis for acute thrombotic events and CAE. Several studies investigated the relationship between MPV and CAE, resulting in conflicting results. These results led us to systemati-cally review all studies investigating the relationship between MPV and ectatic heart dis-eases by performing a meta-analysis study in order to report a unified result. This meta-analysis study investigated all case-control articles examining the relationship be-tween MPV and CAE. All studies in the following databases published until January 31, 2018, were investigated: Science Direct, Scopus, PubMed, Google Scholar, and Web of Science. Following a quality control evaluation, 14 articles, all of which were published following studies performed in Turkey from 2007 to 2016, met the criteria for study inclusion. After pooling the results from all of the articles, a total standardized mean differ-ence (SMD) value of 0.584 (95% CI, 0.219, 0.95) was obtained using the D+L pooled SMD, indicating a significant difference (P=0.002) between the two groups, with higher MPV values in ectatic patients when comparing to healthy individuals. Therefore, in-creased MPV levels were significantly related to CAE, suggesting that platelets, with their inflammatory and thrombotic activities, play a role in this disease. Therefore, anti-platelet and anti-inflammatory therapies may be effective in treating CAE.
Classical shell theory for instability analysis of concrete pipes conveying nanofluid
Reza Keikha,Ali Heidari,Hamidreza Hosseinabadi,Mohammad Salkhordeh Haghighi 사단법인 한국계산역학회 2018 Computers and Concrete, An International Journal Vol.22 No.2
This paper deals with the instability analysis of concrete pipes conveying viscous fluid-nanoparticle mixture. The fluid is mixed by AL2O3 nanoparticles where the effective material properties of fluid are obtained by mixture rule. The applied force by the internal fluid is calculated by Navier-Stokes equation. The structure is simulated by classical cylindrical shell theory and using energy method and Hamilton's principle, the motion equations are derived. Based on Navier method, the critical fluid velocity of the structure is calculated and the effects of different parameters such as fluid velocity, volume percent of nanoparticle in fluid and geometrical parameters of the pipe are considered. The results present that with increasing the volume percent of nanoparticle in fluid, the critical fluid velocity increase.