12 research outputs found

    Quantitative gene expression of ERG9 in model Saccharomyces cerevisiae: Chamomile extract for human cancer treatment

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    Over expression of squalene synthase gene causes induction of growth tumour and reduction of apoptosis. This gene which is conserved between Saccharomyces cerevisiae yeast and humans, is named (ERG9). Aim: In this work, we studied the effect of Matricaria recutita extract on ERG9 gene (squalene synthase) expression in S.cerevisiae which was used as organism model in cancer therapy. Materials and Methods: S. cerevisiae was cultured in YPD medium plus 0,250, 1000 and 3000 µg/ml of Matricaria recutita extract and we evaluated the (ERG9) gene expression by Realtime RT-PCR method after 24 hours. Statistical analysis used: At least 3 independent experiments were done. Data were analyzed using One-way ANOVA and Dunnett’s test. A p-value of less than 0.01 was considered as significant. Results: We found that 250, 1000 and 3000 µg/ml of Matricaria recutita extract could reduce expression of ERG9 gene significantly (p<0.01). Interestingly, the expression of this gene was completely inhibited in 1000 and 3000 µg/ml concentrations. Conclusion: This study predicted that Matricaria recutita extract produced anti-cancer effects in humans, because it could inhibit the expression of an analogue key gene in this malignant disease. Further investigations should be made, to study its molecular mechanism of action at the mammal cell level

    Antiproliferative effects of <em>Matricaria chamomilla on Saccharomyces cerevisiae</em>

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    Introduction: The Matricaria chamomilla plant is one of the most important plants used for the therapeutic purposes. More than 120 chemical constituents have been identified in Matricaria chamomile plant including 28 terpenoids and 36 flavonoids. This plant has a variety of therapeutic applications including the treatment of diabetes, eczema, wounds and gastrointestinal diseases. The Saccharomyces cerevisiae yeast is a non-pathogenic organism that is used as a model for pathogenic yeasts in order to identify compounds with antifungal properties and also to identify functional mechanism of these compounds. The aim of this study is to investigate the antifungal effect of Matricaria chamomilla hydroalcoholic extract on S. cerevisiae yeast. Methods: In this study Matricaria chamomilla extract was prepared by maceration method. In order to study the extract effect on growth and survival rate of the yeast cell, the spectrophotometry and methylene blue staining methods were used. Excel and SPSS 11 softwares were used to determine amounts and to infer the difference between control and treatment samples. Results: Results obtained from spectrophotometry and analyses of methylene blue staining showed that the Matricaria chamomilla extract at the concentration of 3000 &mu;g/ml caused a significant decrease in the yeast growth and reduced the cells survival rate up to 48 (p&lt; 0.05). Conclusion: Results of this research confirm that the hydroalcoholic extract of Matricaria chamomilla has antiproliferative effect on Saccharomyces cerevisiae. </p

    Histopathological effects of orally and intraperitoneal administrations of toxic ZnO nanoparticles (ZnO-NPs) on kidney function, BUN and creatinine in laboratory male mice Mus musculus

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    زمینه و هدف: با توسعه های سریع در فناوری نانو، نانوذرات اکسید روی به طور فزآینده ای در جنبه های مختلف زندگی ما استفاده می شود و اثرات سمی این نانوذرات بر بدن انسان در حال تشدید است. در این مطالعه آسیب بافتی ناشی از تأثیر دو روش خوراکی و درون صفاقی نانو ذرات اکسید روی بر روی عملکرد کلیه در موش سفید آزمایشگاهی (Mus musculus) بررسی گردید. روش بررسی: در این مطالعه تجربی 75 عدد موش سفید (Balb/c) نر به طور تصادفی به سه گروه 25 تایی تقسیم شدند. در گروه تیمار خوراکی به کمک آمپول گاواژ و در گروه تیمار تزریقی به صورت درون صفاقی 05/0 گرم بر میلی لیتر نانو ذره&zwnj;ی اکسید روی به هر یک از موش ها داده شد. در روزهای 1، 7 و 14 خونگیری از قلب موش ها انجام و سرم خون جدا شد. نتایج به کمک آنالیز واریانس یک طرفه (ANOVA) و نرم افزار SPSS تحلیل و اختلاف کمتر از 05/0 معنی دار در نظر گرفته شد. نهایتاً نمونه هایی از بافت کلیه تهیه و بررسی شد. یافته ها: افزایش معنی داری در سطح BUN و کراتینین سرم خون در روز هفتم آزمایش در گروه تزریقی همراه با آسیب های بافتی مشخصی از جمله اتساع عروقی و نفوذ سلول های خونی به داخل عروق و ما بین لوله های ادراری، واکوئله شدن سیتوپلاسم سلول های جداری لوله های پروکسیمال (نکروز) در هر دو گروه تزریقی دیده شد. آسیب های بافتی ایجاد شده در گروه تیمار تزریقی با شدت کمتری در گروه تیمار خوراکی مشاهده شد. نتیجه گیری: غلظت حاد نانوذرات اکسید روی سبب آسیب های جدی و فیزیولوژیک از جمله پرخونی، نکروز تعدادی از سلول ها، هیدراته شدن سلول های پروکسیمال و تورم کلیوی در گروه تزریقی می شود که این آسیب ها با شدت بسیار کمتری در گروه خوراکی قابل مشاهده بود

    An assessment of acute oral toxicity of ZnO nanoparticles on serum biochemical function of liver in mice

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    . زمینه و هدف: با صنعتی شدن نانو تکنولوژی، در معرض قرار گیری عموم با نانو ذرات در آینده نزدیک افزایش خواهد یافت؛ لذا بررسی اثرات دوزهای مختلف این نانوذرات و اثرات آن ها بر سلامتی حائز اهمیت است. این مطالعه با هدف ارزیابی اثر سمیت حاد نانو ذرات اکسید روی بر برخی فاکتورهای بیوشیمیایی کبد در سرم خون موش انجام شد. روش بررسی: در این مطالعه تجربی، 18 سر موش ماده Balb/c به صورت تصادفی در سه گروه، یک گروه شاهد و دو گروه تیمار قرار گرفتند. گروه شاهد در روز اول یک میلی لیتر آب مقطر، ولی گروه های تیمار فقط در روز اول نانوذرات اکسید روی را در غلظت های حاد g/ml 05/0 و g/ml 1/0 دریافت کردند. بعد از 14 روز خونگیری از موش ها انجام شد. غلظت سرمی آنزیم های لاکتات دهیدروژناز (LDH)، آلکالاین فسفاتاز (ALP)، آلانین آمینوتراسفراز (ALT) و آسپارتات آمینوتراسفراز (AST)با استفاده از اتوآنالایزر تعیین شد. یافته ها: افزایش قابل توجهی در آنزیم های ALP، ALT و AST در گروه دریافت کننده از هر دو غلظت نانو ذرات اکسید روی نسبت به گروه شاهد مشاهده شد (01/0=P). همچنین غلظت سرمی آنزیم LDH فقط با دوز g/ml 1/0 از نانوذرات اکسید روی افزایش معنی داری نشان داد (01/0=P). نتیجه گیری: بررسی حاضر نشان داد که سطوح حاد نانوذرات اکسید روی سمی هستند و اثرات مضرشان را بر کبد از طریق افزایش پارامترهای سرمی بیوشیمیایی کبد نشان می دهند؛ لذا در استفاده از این نانوذرات باید احتیاط لازم صورت پذیرد

    Anticancer activity of ethanolic extract of propolis on AGS cell line

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    Introduction: Propolis is a natural product derived from various plant resins collected by honeybees, and has been used as a folk medicine for centuries. Propolis has been reported to exhibit a broad spectrum of activities including antibacterial, antifungal, antiviral, anti-inflammatory, antioxidant, hepatoprotective, and anticancer properties. The aim of this study was to investigate the effect of ethanolic extract of propolis (EEP) obtained from Dinaran area (Iran) on AGS human gastric cancer cell line. Methods: The ethanolic extract of samples was obtained by ethanol 96 and pure extract was dissolved in dimethyl sulfoxide (DMSO) and used for experiments. The cytotoxic effects of various concentrations of EEP on AGS cells were investigated by MTT assay test after 24, 48, and 72 hours and compared with control cells. Results: The EEP inhibited the growth and proliferation of AGS human gastric cancer cell line. The antiproliferative effects were revealed in a dose and time-dependent manner. The IC50 values were recorded as 60, 30, and 15 (&mu;g/ml) in treatment times of 24, 48 and 72 hours, respectively. Conclusion: These findings indicated that the native EEP has strong antiproliferative effects against cancerous AGS cells. Thus, propolis and related products may provide a novel approach to the chemoprevention and treatment of human gastric cancer.</p

    Effect of Chrysin on AGS human gastric cancer cell line

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    Background and Objective: Chrysin is a natural and active biological component which is extracted from plants, honey and propolis. Chrysin has anti-inflammatory, anticancer and antioxidant propertis. This study was done to evaluate the effect of chrysin on AGS human gastric cancer cell line. Methods: In this descriptive - analytic study, chrysin was dissolved in dimethyl sulfoxide (DMSO) and the cytotoxic effects of concentrations of 10, 15, 20, 30, 40 ,50, 60, 70, 80, and 100 µM/ml of chrysin on AGS cells was evaluated. Viability of the cells was determined with MTT assay after 24, 48 and 72 hours and compared to controls. Results: Chrysin inhibited the growth and proliferation of human gastric cancer AGS cell line. The antiproliferative effect of chrysin was dose and time dependent. The IC50 values were determined for 60, 30 and 20 µM, in incubation time of 24, 48 and 72 hour, respectively (P<0.05). Conclusion: Chrysin proved to have antiproliferative activity on human gastric cancer cells in culture mediu

    A macro-and microscopic local effect of silver nanoparticles on skin wound healing and some biochemical parameters of blood in mice

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    زمینه و هدف: در حال حاضر نقره و ترکیبات آن به عنوان یک راه حل مناسب برای درمان عفونت در سوختگی ها، زخم های باز و زخم های مزمن به کار برده می شوند. این مطالعه با هدف بررسی اثر موضعی نانوذرات نقره بر روی پارامترهای بیوشیمایی خون و بافت کلیه در هنگام ترمیم زخم در موش سفید آزمایشگاهی طراحی و اجرا شد. روش بررسی: در این مطالعه تجربی، 50 سر موش بالب سی (Balb/c) ماده در حدود 4 هفته (با وزن 3±2/24 گرم) در دو گروه 25 تایی (تیمار و کنترل) مورد بررسی قرار گرفتند. پس از ایجاد زخم یکسان در همه حیوانات سطح زخم گروه تیمار با µl 50 محلول ppm 10 و برای گروه کنترل با همان مقدار آب مقطر تیمار شد. در روزهای دوم، هفتم، چهاردهم و بیست و یکم نمونه گیری بافت از زخم پوست و نمونه گیری از خون انجام شد و مساحت زخم برای هر دو گروه در روزهای متوالی اندازه گیری شد. یافته ها: درصد بهبود زخم در گروه تیمار نسبت به گروه کنترل به طور معنی داری بیشتر بود. به طوری که در گروه تیمار بهبود نهایی در زمان 82/0±14روز و در گروه کنترل بهبودی نهایی در زمان 03/1±75/20 روز خاتمه یافت (05/0>P). متوسط پتاسیم و نیتروژن اوره خون در بین گروه ها تفاوت معنی داری نشان داد (05/0>P). نتیجه گیری: نتایج نشان داد که محلول ppm 10 نانوذرات نقره علاوه بر تسریع بهبود زخم، بر روی برخی پارامترهای خون به طور معنی داری اثرات منفی می گذارد؛ لذا علاوه بر اثرات سودمند خود دارای اثرات مضر نیز می باشد و باید در مصرف آن احتیاط لازم را مبذول نمود

    Characterization and increment of amylase production in mutant strains of Iranian native Bacillus licheniformis

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    Introduction:The amylase enzyme hydrolyze starch and break glycosidic internal bonds of this polysaccharides. Amylases are important industrial enzymes for a wide range of applications including starch conversion to sugar syrup, dextrin production, and use in the pharmaceutical and medical industries. Materials and methods: In this study, thermophilic bacterium was isolated and purified from the Qynarcheh hot spring in Ardabil. Desired strain suspension in nutrient broth medium was placed in front of UV rays with a wavelength of 254 nm at a distance of 1 meter for 45 seconds in the laminar air flow. The mutant strains were compared to wild type in temperature and salinity tolerance, amylase production content and different antibiotics resistance. Results: In this study, two interesting mutant strains were isolated and named B.L.2.M.1 and B.L.2.M.2. Mutations caused many changes in bacteria such as cell growth speed and enzyme production content. Differences in cell growth, production of amylase and other characters were significant at 0.05 level (Pvalu

    Functional analysis of recombinant codon-optimized bovine neutrophil β-defensin

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    Defensins are cationic antimicrobial peptides with a broad range of activities against bacteria and fungi. In the present study, the entire coding sequence of codon-optimized Bovine Neutrophil β-Defensin 2 (BNBD2) was designed and placed upstream of Trx coding sequence into the pET-48b (+) vector. Furthermore, the codon-optimized pelB signal sequences were also added to the upstream of BNBD2 for periplasmic localization. The periplasmic sorting of recombinant β-Defensin 2 was evaluated by osmotic shock and SDS–PAGE on the released proteins. Moreover, the expression of BNBD2-Trx fusion protein was confirmed by the Western blotting technique. Next, the purification of recombinant protein was achieved by Ni++ affinity chromatography. BNBD2 was also separated from Trx by chemical cleavage with formic acid. Finally, both of the antibacterial and antifungal activities of the purified protein were examined. Overall, the results indicated successful periplasmic production of BNBD2 protein, which showed antifungal activity against some of Aspergillus species as well as the antibacterial activity, expressed as successfully suppressed growth of Escherichia coli and Staphylococcus aureus

    Antiproliferative effects of Matricaria chamomilla on Saccharomyces cerevisiae

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    Introduction: The Matricaria chamomilla plant is one of the most important plants used for the therapeutic purposes. More than 120 chemical constituents have been identified in Matricaria chamomile plant including 28 terpenoids and 36 flavonoids. This plant has a variety of therapeutic applications including the treatment of diabetes, eczema, wounds and gastrointestinal diseases. The Saccharomyces cerevisiae yeast is a non-pathogenic organism that is used as a model for pathogenic yeasts in order to identify compounds with antifungal properties and also to identify functional mechanism of these compounds. The aim of this study is to investigate the antifungal effect of Matricaria chamomilla hydroalcoholic extract on S. cerevisiae yeast. Methods: In this study Matricaria chamomilla extract was prepared by maceration method. In order to study the extract effect on growth and survival rate of the yeast cell, the spectrophotometry and methylene blue staining methods were used. Excel and SPSS 11 softwares were used to determine amounts and to infer the difference between control and treatment samples. Results: Results obtained from spectrophotometry and analyses of methylene blue staining showed that the Matricaria chamomilla extract at the concentration of 3000 μg/ml caused a significant decrease in the yeast growth and reduced the cells survival rate up to 48% (p< 0.05). Conclusion: Results of this research confirm that the hydroalcoholic extract of Matricaria chamomilla has antiproliferative effect on Saccharomyces cerevisiae
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