فهرست مطالب

  • Volume:4 Issue:3, 2020
  • تاریخ انتشار: 1398/11/19
  • تعداد عناوین: 6
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  • Iraj Shahramian, Kaveh Tabrizian, Mojtaba Delaramnasab, Ali Khosravi Bonjar, Seyed Mohsen Dehghani, Omolbanin Sargazi Aval, Ali Bazi* Pages 86-95

    Appropriate diagnostic and therapeutic measures for liver cirrhosis is critical, particularly in children. In the present review, a comprehensive approach was provided toward hematological parameters in pediatric liver cirrhosis. The literature search included MeSH terms “liver cirrhosis” and “hepatic cirrhosis” and databases such as PubMed, Web of Science, Scopus, and Google Scholar were searched up until December 2017. Hematologic changes in the liver cirrhosis mainly encompassed anemia and coagulopathies. In addition, bleeding diathesis was considered as the most clinical complication in these patients. In addition to reduced coagulation factors, hyperfibrinolysis is a common feature in childhood cirrhosis and may be an important contributor to the risk of bleeding. Based on the results, children with liver cirrhosis also demonstrated a procoagulant state at laboratory and clinical levels. This may be partly due to a reduction in coagulation inhibitors such as anti-thrombin, C1 inhibitor, and α1-antitrypsin in children with cirrhosis. The portal vein thrombosis and portal hypertension are considered as the most clinical presentations of the hypercoagulable state. Further, children with liver cirrhosis complicated with portal hypertension usually show leukopenia, anemia, and thrombocytopenia due to hypersplenism. Although the etiology of childhood and adult cirrhosis may be different, their hematological compilations and clinicopathological features are somehow similar.

    Keywords: Liver cirrhosis, Pediatrics, Hematology, Coagulopathy, Anemia, Portal hypertension
  • Masomeh Hoseini, Maryam Fahim Danesh* Pages 96-101
    Introduction

    Oxygen, light, heat, metal ions, and enzymes are among the agents that oxidize oils, fats, and high-fat food products which result in oxidative spoilage. Due to the toxicity and cancer risk of oxidative agents, the use of synthetic antioxidants is important for delaying the oxidation processes. The purpose of this study was to evaluate the protective effect of natural antioxidants including green tea leaf extract and butylated hydroxytoluene (BHT) on the oxidation of the corn refined oil of microwave-heated fried potatoes.

    Methods

    To this end, corn refined oil and corn oil were treated with green tea leaf extracts (i.e., 200, 400, 600, and 800 ppm), followed by treating the oils with a combination of green tea leaf extract (600 ppm) and BHT (200 ppm). The samples with no anti-oxidant treatments were used as the controls. Eventually, several parameters related to the corn oils were determined, including peroxide content, acidity, polar compounds, and ionic bond conjugates.

    Results

    Based on the results, significant increases were observed in peroxide, acidity, polar compounds, and ionic bond conjugates in the corn refined oil of microwave fried potatoes (P < 0.05). On the other hand, the results showed that the heating process reduced peroxide content (P < 0.05). However, acidity increased significantly during the heating process (P > 0.05) and the lowest acid value was observed in the mixture of 600 ppm of the green tea leaf with 200 ppm of the BHT. There was no significant difference between the control group and the samples treated with 200 ppm of the green leaf extract (P < 0.05) in terms of polar components. In addition, a significant decrease was found in the conjugated dienes by increasing the green tea leaf extract concentration (P < 0.05). Finally, the highest protection was achieved in the oils that were treated with a combination of green tea leaf extract and BHT.

    Conclusion

    In general, the green tea leaf extract and BHT have antioxidant activities that make them suitable agents for use in food protection industries.

    Keywords: Green tea leaf extract, Corn oil, Microwaves, Antioxidant, frying, Butylated hydroxytoluene
  • Mozhgan Bahadoripour, Mohammad Hassan Jahandar* Pages 102-107
    Introduction

    Escherichia coli O157:H7, as a pathogenic agent, can be transmitted through the foods including meat, meat products, dairy products, vegetables and water. The World Health Organization has recommended that all countries in the world, especially developing countries, should consider the investigation of E. coli O157:H7 as a research priority. The aim of this study was to determine the frequency of E. coli O157:H7 in meat of cow, sheep, goat, and camel in Kerman province of Iran using culture and polymerase chain reaction (PCR) methods.

    Methods

    In this study, 280 meat samples consisting of sheep (90 specimens), cow (80 specimens), goat (60 specimens) and camel (50 specimens) meats were randomly separated from carcasses from April to July 2018. After the sampling, microbial culture was performed on the samples. Then, suspected E. coli O157:H7 colonies were evaluated by PCR assay.

    Results

    Out of the 280 samples, 73 samples (26%) were contaminated with E. coli. based on bacteriological tests, and 28 samples were identified as suspected E. coli O157:H7 serotype based on the lack of sorbitol fermentation. Subsequently, sorbitol-negative samples were tested by PCR procedure using specific primers. The results revealed that out of 28 cases, 21 cases (7.5%) were E. coli O157:H7.

    Conclusion

    As can be deduced from the observations of this study, to detect the E. coli O157, PCR as an accurate, fast, and reliable procedure can be used along with the culture method.

    Keywords: E. coli O157:H7, PCR, Culture, Meat contamination
  • Ali Es, haghi*, Saynaz Aseyd Nezhad Pages 108-112
    Introduction

    Free radicals have singlet electron in their outer layer rendering them high reactivity against biomolecules (i.e., DNA, carbohydrates, proteins, and lipids). Oxidative stress is created when the production of free radicals exceeds their removal by antioxidant systems and is involved in the pathogenesis of several diseases such as diabetes, arthritis, inflammatory conditions, and various cancers. Regarding the therapeutic potential of nanoparticles (NPs) in human diseases, the purpose of this study was to synthesize cerium oxide NPs using Origanum majorana leaf extract.

    Methods

    Cerium oxide nanoparticles (CeO2-NPs) were synthesized using aqueous leaf extract of O. majorana. The sizes of NPs were characterized by a particle size analyzer. The antioxidant properties of the CeO2-NPs were determined by Ferric-reducing antioxidant power (FRAP) assay. The anti-inflammatory effects of the NPs were also determined by measuring gene expressions of IL-1β and IL-10 using real-time polymerase chain reaction (PCR).

    Results

    The CeO2-NPs were successfully synthesized using O. majorana leaf extract. The results of FRAP assay showed that the anti-oxidant activities of CeO2-NPs at concentrations of 50, 100, and 400 μg/mL were 75%, 77.1%, and 94.5%, respectively. Moreover, interleukin 10 (IL-10) gene expressions increased by 4.6 folds while the expression of IL-1β gene decreased by 0.75-fold in HUVECs.

    Conclusion

    The CeO2-NPs synthesized using the aqueous extract of O. majorana demonstrated antioxidant and anti-inflammatory properties. Therefore, these NPs can be used as potential therapeutic agents in medicine.

    Keywords: Cerium oxide nanoparticle, Green synthesis, Origanum majorana, Interleukin, Antiinflammatory
  • Fatemeh Safari*, Masomeh Rabieepor, Fatemeh Jamalomidi, Zahra Baghaeifar, Leila Khodaei Pages 113-118
    Introduction

    Green tea contains active polyphenols including catechins. The goal of the current study was to evaluate anti-cancer effects of Iranian green tea extract (IGTE) on 3 human cancer cell lines including A549, PC3, and MCF-7.

    Methods

    First, Camellia sinensis was obtained from Lahijan, a city in the north of Iran and then IGTE was prepared. Next, catechins of IGTE were determined using high-performance liquid chromatography (HPLC). Finally, the cell viability of different cancer cells was evaluated by treatment with IGTE at concentration between 100 and 1000 µg/mL for 72 hours using MTT assay. Cell death of treated cancer cells was assessed by DAPI staining and RT-PCR method.

    Results

    Our results demonstrated the potential anti-tumor activity of IGTE on MCF-7 cells (IC50= 400 µM), A549 cells (IC50= 500 µM), and PC3 cells (IC50= 600 µM), respectively. Chromatin damages within the nucleus of the treated cancer cells were shown. In addition, we found that IGTE induced apoptosis by up-regulation of Bax (a pro-apoptotic protein) and down-regulation of Bcl2 (an anti-apoptotic protein).

    Conclusion

    Herein, we showed that IGTE is a potent natural product with anti-tumor activity on breast, lung, and prostate cancer cells. The efficacy of current therapies against cancer is limited by a range of adverse effects, toxicity, and drug resistance; therefore, new therapeutic strategies and more effective agents, particularly with natural origin, are desired and green tea may be a potent candidate in the field of cancer therapy.

    Keywords: Iranian green tea extract, HPLC, Cancer cell lines, Apoptosis
  • Leila Foroutan, Mahmood Solouki*, Vahid Abdossi, Barat Ali Fakheri, Nafiseh Mahdinezhad, Kamal Gholamipourfard, Abdolmajid Safarzaei Pages 119-127
    Introduction

    Moringa peregrina (Forssk.) Fiori, is a nutritionally and medicinally important desert tree, which is constantly exposed to drought stress. This study was accomplished to alleviate the adverse effects of drought stress on M. peregrina populations through the foliar application of zinc oxide nanoparticles (ZnO-NPs) by monitoring some physiological and biochemical alterations.

    Methods

    Moringa peregrina seeds were collected from the Southeast of Iran in 2014. Fourteen days after germination, the seedlings were subjected to drought stress by withholding watering until 50% field capacity (FC), followed by spraying 0.1% and 0.05% ZnO-NPs and no spraying (as control).

    Results

    The changes of sodium (Na), potassium (K), chlorophylls, total phenolic content (TPC) as well as antioxidant activity under drought stress condition varied based on M. peregrina populations. Drought stress significantly reduced chlorophylls content, while it enhanced TPC and antioxidant activity. ZnO-NPs treatment significantly inhibited chlorophylls degradation under drought stress conditions. It also enhanced chlorophyll content in well-watered plants. Moreover, it was revealed that TPC and antioxidant activity of M. peregrina populations significantly increased in response to foliar application of ZnO-NPs in both drought-stressed and unstressed plants.

    Conclusion

    Our results suggested that ZnO-NPs spray can augment drought tolerance of different populations of M. peregrina subjected to water deficit condition.

    Keywords: Chlorophylls, Nutrients uptake, Phenol, Secondary metabolites, ZnO-NPs