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  1. Article ; Online: Relation between biochemical parameters and bone density in postmenopausal women with osteoporosis

    Mohammad Reza Salamat / Shokouh Momeni / Ali Asghar Rastegari

    Advanced Biomedical Research, Vol 12, Iss 1, Pp 162-

    2023  Volume 162

    Abstract: Background: Osteoporosis is the most prevalent metabolic bone disease in postmenopausal women associated with reduced bone mass and increased bone fracture. Measuring bone density in the lumbar spine and hip is a reliable measure of bone mass and can ... ...

    Abstract Background: Osteoporosis is the most prevalent metabolic bone disease in postmenopausal women associated with reduced bone mass and increased bone fracture. Measuring bone density in the lumbar spine and hip is a reliable measure of bone mass and can therefore specify the risk of fracture. Dual-energy X-ray absorptiometry (DXA) is an accurate non-invasive system measuring bone density, with a low margin of error and no complications. The present study aimed to investigate the relationship between biochemical parameters with bone density in postmenopausal women. Materials and Methods: This cross-sectional study was conducted on 87 postmenopausal women referred to osteoporosis centers in Isfahan. Bone density was measured in the spine and hip area using the DXA system. Serum levels of calcium, phosphorus, alkaline phosphatase, and magnesium were measured by an autoanalyzer, and serum levels of vitamin D were measured by high-performance liquid chromatography (HPLC). Results: The mean parameters of calcium, phosphorus, alkaline phosphatase, vitamin D, and magnesium did not show a significant difference between the two groups (P-value > 0.05). In the control group, the relationship between alkaline phosphatase and bone mineral content (BMC) and bony area (BA) in the spine was significant with a correlation coefficient of − 0.402 and 0.258, respectively (P-value < 0.05) and BMD and T-score in the femoral neck area showed a direct and significant relationship with phosphorus (correlation = 0.368; P value = 0.038). There was a significant relationship between the Z-score with calcium (correlation = 0.358; P value = 0.044). Conclusion: There was no significant relationship between the values of calcium, phosphorus, alkaline phosphatase, vitamin D, and magnesium parameters and bone density (spine and hip) in postmenopausal women with osteopenia or osteoporosis.
    Keywords alkaline phosphatase ; bone mineral density ; calcium ; magnesium ; menopause ; osteoporosis ; phosphorus ; vitamin d ; Medicine ; R ; Biology (General) ; QH301-705.5
    Subject code 616
    Language English
    Publishing date 2023-01-01T00:00:00Z
    Publisher Wolters Kluwer Medknow Publications
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article ; Online: Evaluation of the Cytokine Genes Expression in Vaccinated BALB/c Mice with pEGFP-C2-leoA DNA Vaccine

    Zahra Ahmadzadeh Chaleshtori / Ali Asghar Rastegari / Hashem Nayeri / Abbas Doosti

    Majallah-i Dānishgāh-i ’Ulūm-i Pizishkī-i Shahīd Ṣadūqī Yazd, Vol 30, Iss 12, Pp 6199-

    2023  Volume 6210

    Abstract: Introduction: Helicobacter pylori (H. pylori) causes successive changes in the stomach wall, which starts with inflammation of the stomach mucosa and in some cases leads to stomach cancer. The leoA gene, by encoding GTPase, plays a vital role in the ... ...

    Abstract Introduction: Helicobacter pylori (H. pylori) causes successive changes in the stomach wall, which starts with inflammation of the stomach mucosa and in some cases leads to stomach cancer. The leoA gene, by encoding GTPase, plays a vital role in the pathogenicity of this bacterium in the gastric mucosa. The secretory vesicles produced by the leoA gene release poison and stimulate the immune system in the host's body. The aim of the present study was to evaluate the gene vaccine pEGFP-C2-leoA on the expression changes of cytokines such as IL6, IL4, and interferon-gamma in inflammation caused by Helicobacter pylori infection in a mouse model. Methods: In this interventional experimental study, recombinant plasmid (pEGFP-C2-leoA) was produced, propagated, and extracted through transformation into susceptible bacterial cells. Then, suitable concentrations of 1% chitosan nanoparticles solution were prepared for injection into the quadriceps muscle of BALB/c mice. Finally, the gene expression and changes of the mentioned cytokines were measured by Real-Time RT-PCR method, the obtained results were statistically analyzed by SPSS version 16 software; One way ANOVA test and subsequent LSD test, as well as independent t-test, were used to check the existence of correlation and the significance level of the data. Results: After the injection of the vaccine into the quadriceps muscle of mice during the treatment period, cytokines IFNᵧ (<0.038) and IL6 (<0.049) showed a significant increase in expression. On the other hand, cytokine IL4 and the leoA gene also showed a significant decrease in expression (>0.042). Conclusion: Based on the results, the leoA gene cloned in the expression vector pEGFP-C2 has the ability to express and produce the specific protein product of this gene in eukaryotic cells, and according to the results obtained in the animal model and the immune characteristic obtained in this research it is shown that the final construct pEGFP-C2-leoA has the necessary potential to investigate ...
    Keywords gastric cancer ; helicobacter pylori ; cytokine ; vaccine ; leoa ; balb/c ; Medicine (General) ; R5-920
    Subject code 570
    Language Persian
    Publishing date 2023-03-01T00:00:00Z
    Publisher Shahid Sadoughi University of Medical Sciences
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article ; Online: Antibacterial Activity of the Peptide Microcin J25 Produced by Escherichia coli

    Saman Shalibeik / Fereshte Ghandehari / Ali-Mohammad Ahadi / Ali-Asghar Rastegari / Mojgan Ghiasian

    Medical Laboratory Journal, Vol 16, Iss 3, Pp 14-

    2022  Volume 18

    Abstract: Background and objectives: Bacteriocins are generally active antimicrobial peptides effective against bacteria closely related to the producer. Escherichia coli produce two bacteriocins: colicins and microcins. Microcin J25 (Mcc J25) is an antibacterial ... ...

    Abstract Background and objectives: Bacteriocins are generally active antimicrobial peptides effective against bacteria closely related to the producer. Escherichia coli produce two bacteriocins: colicins and microcins. Microcin J25 (Mcc J25) is an antibacterial peptide that inhibits bacterial transcription by disrupting the nucleotide-uptake channel of bacterial RNA polymerase. The objective of this study was to evaluate antimicrobial activity of MccJ25 produced by the bacteriocinogenic E. coli. Methods: In this experimental study, 120 clinical specimens were selected from private diagnostic laboratories in Isfahan (Iran) in 2020. Antagonistic activity of isolates was tested by adopting agar plug method. Total DNA was extracted from clinical specimens and polymerase chain reaction (PCR) was performed using specific primers for amplification of the complete sequence of MccJ25 gene. Accuracy of the PCR products was confirmed by direct sequencing. Homology analysis was performed by using BLAST. Data were analyzed with Chromasv2.1.1 software. Results: Overall, 120 E. coli strains were isolated from the clinical specimens. The antibiotic activity of Mcc J25 was mainly directed at Enterobacteriaceae, including several pathogenic E. coli strains of which 25 had positive well test samples, and about 5 (20%) of the collected clinical samples that were infected with E. coli had the MccJ25 gene. Conclusions: Based on the results, Mcc J25 has favorable antibacterial potential, which can be further exploited as an alternative to chemical antibiotics.
    Keywords bacteriocins ; microcin ; escherichia coli ; Medicine ; R
    Language English
    Publishing date 2022-05-01T00:00:00Z
    Publisher Golestan University of Medical Sciences
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  4. Article ; Online: Evaluation of Anti-Cancer Effects of Caspian Cobra (Naja naja oxiana) Snake Venom in Comparison with Doxorubicin in HeLa Cancer Cell Line and Normal HFF Fibroblast

    Fatemeh Javani Jouni / Jaber Zafari / Elaheh Shams / Parviz Abdolmaleki / Ali asghar Rastegari

    Majallah-i Dānishgāh-i ’Ulūm-i Pizishkī-i Īlām, Vol 29, Iss 6, Pp 20-

    2021  Volume 27

    Abstract: Introduction: Cancer is the leading cause of death in most countries. There are several methods used to treat cancer. Doxorubicin is one of the most important chemotherapy drugs that has several side effects, such as infertility, hyperuricemia, ... ...

    Abstract Introduction: Cancer is the leading cause of death in most countries. There are several methods used to treat cancer. Doxorubicin is one of the most important chemotherapy drugs that has several side effects, such as infertility, hyperuricemia, neuropathy, and cardiomyopathy. This study aimed to evaluate the anti-cancer effects of Naja naja oxiana in comparison with doxorubicin in Hela (Human cervical cancer) and HFF (Human foreskin fibroblast) cell line. Material & Methods: Hela and normal fibroblast cancer cell lines were exposed to different concentrations (1, 10, 50, 100, and 500 μg/ml) of snake venom and doxorubicin. The MTT method was used to evaluate the IC50 (Inhibitory Concentration) for toxins and drugs. Finally, the results were analyzed using SPSS software (version 19). Findings: The results show that with increasing concentration and time of treatment with snake venom and doxorubicin, the percentage of Hela and fibroblasts living cells decreases. The highest decrease in the percentage of the viable cells was observed in the Hela cancer cell line treated with a concentration of 500 μg/ml snake venom for 48 h. Discussion & Conclusion: Snake venom can have a significant inhibitory effect on the percentage of living Hela cancer cells in comparison with doxorubicin.
    Keywords doxorubicin ; human cervical cancer cells ; snake venom ; Medicine ; R ; Medicine (General) ; R5-920
    Subject code 616
    Language Persian
    Publishing date 2021-12-01T00:00:00Z
    Publisher Ilam University of Medical Sciences
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  5. Article ; Online: The Investigation of Metabonomic Pathways of Serum of Iranian Women with Recurrent Miscarriage Using 1H NMR

    Mahbobeh Latifimehr / Ali Asghar Rastegari / Zahra Zamani / Pezhman Fard Esfahani / Leila Nazari

    BioMed Research International, Vol

    2021  Volume 2021

    Abstract: Purpose. Recurrent miscarriage applies to pregnancy loss expulsion of the fetus within the first 24 weeks of pregnancy. This study is aimed at comparatively investigating the sera of women with RM with those who have no record of miscarriages to identify ...

    Abstract Purpose. Recurrent miscarriage applies to pregnancy loss expulsion of the fetus within the first 24 weeks of pregnancy. This study is aimed at comparatively investigating the sera of women with RM with those who have no record of miscarriages to identify if there were any metabolite and metabolic pathway differences using 1H NMR spectroscopy. Methods. Serum samples were collected from women with RM (n=30) and those who had no records of RM (n=30) to obtain metabolomics information. 1H NMR spectroscopy was carried out on the samples using Carr Purcell Meiboom Gill spin echo; also, Partial Least Squares Discriminant Analysis was performed in MATLAB software using the ProMetab program to obtain the classifying chemical shifts; the metabolites were identified by using the Human Metabolome Database (HMDB) in both the experimental and control groups. The pathway analysis option of the Metaboanalyst.ca website was used to identify the changed metabolic pathways. Results. The results of the study revealed that 14 metabolites were different in the patients with RM. Moreover, the pathway analysis showed that taurine and hypotaurine metabolism along with phenylalanine, tyrosine, and tryptophan biosynthesis was significantly different in patients with RM. Conclusion. The present study proposes that any alteration in the above metabolic pathways might lead to metabolic dysfunctions which may result in a higher probability of RM.
    Keywords Medicine ; R
    Subject code 570
    Language English
    Publishing date 2021-01-01T00:00:00Z
    Publisher Hindawi Limited
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  6. Article ; Online: Thermal stability of pepsin

    Ali Asghar Rastegari / Behnaz Buzari / Abdol-Khalegh Bordbar

    Biochemistry and Biophysics Reports, Vol 9, Iss C, Pp 295-

    A predictive thermodynamic model of a multi-domain protein

    2017  Volume 301

    Abstract: Pepsin is generally used in the preparation of F(ab)2 fragments from antibodies. The antibodies that are one of the largest and fastest growing categories of bio- pharmaceutical candidates. Differential scanning calorimetric is principally suitable ... ...

    Abstract Pepsin is generally used in the preparation of F(ab)2 fragments from antibodies. The antibodies that are one of the largest and fastest growing categories of bio- pharmaceutical candidates. Differential scanning calorimetric is principally suitable method to follow the energetics of a multi-domain, fragment to perform a more exhaustive description of the thermodynamics in an associating system. The thermodynamical models of analysis include the construction of a simultaneous fitting of a theoretical expression. The expression depending on the equilibrium unfolding data from multimeric proteins that have a two-state monomer. The aim of the present study is considering the DSC data in connection with pepsin going through reversible thermal denaturation. Afterwards, we calculate the homology modeling identification of pepsin in complex multi-domain families with varied domain architectures. In order to analyze the DSC data, the thermal denaturation of multimer proteins were considered, the “two independent two-state sequential transitions with domains dissociation model” was introduced by using of the effective ΔG concept. The reversible unfolding of the protein description was followed by the two-state transition quantities which is a slower irreversible process of aggregation. The protein unfolding is best described by two non-ideal transitions, suggesting the presence of unfolding intermediates. These evaluations are also applicable for high throughput investigation of protein stability.
    Keywords Multimeric proteins ; Thermal denaturation ; Protein unfolding ; Differential Scanning Calorimetric ; Sequential transition ; Biology (General) ; QH301-705.5 ; Biochemistry ; QD415-436
    Subject code 612
    Language English
    Publishing date 2017-03-01T00:00:00Z
    Publisher Elsevier
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  7. Article ; Online: The Study of the Multilayer Filtration Process Efficiency on Giardia lamblia Elimination in Isfahan Water Treatment Plant

    Zahra Mosaviyan / Ali-Asghar Rastegari / Saeed Abedi

    Biological Journal of Microorganism, Vol 3, Iss 9, Pp 89-

    2014  Volume 98

    Abstract: Introduction: Giardia lamblia is a waterborne highly infectious protozoan parasite capable of causing gastrointestinal illness. The multilayer filtration is used in many applications such as turbidity removes from surface waters and Bacteria, Viruses and ...

    Abstract Introduction: Giardia lamblia is a waterborne highly infectious protozoan parasite capable of causing gastrointestinal illness. The multilayer filtration is used in many applications such as turbidity removes from surface waters and Bacteria, Viruses and protozoan removes. This study was investigated in full-scale the efficiency of filtration process during water treatment that remove Giardia cyst in water at Isfahan province. Materials and methods: We used Information Collection Rule method (ICR). In this method the polypropylene yarn-wound cartridge filter for isolation of these parasites was examined and followed by elution, sample concentration, flotation by percoll-sucrose solution and immunofluorescence antibody (IFA) staining to recognize them. Results: Result showed that three layer filtration had a maximum 2.3 log10 for remove Giardia cyst. Cysts removal in water filtration is likely to be comparable to the efficiency of turbidity. Efficiency removal was 99.5% for Giardia and 92.7% for turbidity in filtration stage. We detected 0.2 cyst per 100 liter and per 100 liter in filtered water. This observation is according to U.S.EPA standards. The number of cysts were more in high pH samples. Discussion and conclusion: Analysis of physical processes of treatment water in Isfahan plant configurations showed that granular filters (include sand, anthracite and garnet filter) were more likely to have effluence in removal cysts than dual filters.
    Keywords Giardia ; Water treatment ; Filtration ; Garnet ; Biology (General) ; QH301-705.5 ; Science ; Q
    Language Persian
    Publishing date 2014-04-01T00:00:00Z
    Publisher University of Isfahan
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  8. Article: Spectroscopic studies of the interaction between alprazolam and apo-human serum transferrin as a drug carrier protein

    Karimian Amroabadi, Marzieh / Asghar Taheri-Kafrani / Leily Heidarpoor Saremi / Ali Asghar Rastegari

    International journal of biological macromolecules. 2018 Mar., v. 108

    2018  

    Abstract: The interaction between apo-human serum transferrin (Apo-hTf) and alprazolam was investigated using various spectroscopic techniques. The drug quenched the fluorescence intensity of Apo-hTf and the mechanism behind the quenching was static. The ... ...

    Abstract The interaction between apo-human serum transferrin (Apo-hTf) and alprazolam was investigated using various spectroscopic techniques. The drug quenched the fluorescence intensity of Apo-hTf and the mechanism behind the quenching was static. The thermodynamic parameters (ΔG, ΔH, and ΔS) that obtained from tryptophan fluorescence study revealed that the interactions between alprazolam and Apo-hTf were spontaneous. Collectively, hydrophobic interactions and hydrogen bonding most likely played major roles in Apo-hTf/alprazolam interactions. Also, the absorption spectra of Apo-hTf increased in the presence of increasing concentration of alprazolam, reflecting Apo-hTf structural alteration after drug’s binding. The CD results demonstrated that the Apo-hTf/alprazolam interaction does not affect the protein secondary and tertiary structure significantly until the molar ratios (alprazolam/Apo-hTf) of 10, but the conformational changes become visible at higher molar ratios. The DSC results suggested that alprazolam stabilized the Apo-hTf at alprazolam/Apo-hTf molar ratio of 20. Based on the achieved results, this potentially therapeutic agent can significantly bind to Apo-hTf which also further confirmed by molecular docking study. This study on the interaction of the drug with Apo-hTf should be helpful for understanding the transportation and distribution of drugs in vivo, as well as the action mechanism and dynamics of a drug at the molecular level.
    Keywords blood serum ; drug carriers ; drugs ; fluorescence ; hydrogen bonding ; hydrophobic bonding ; molecular models ; spectral analysis ; spectroscopy ; thermodynamics ; transferrin ; tryptophan
    Language English
    Dates of publication 2018-03
    Size p. 263-271.
    Publishing place Elsevier B.V.
    Document type Article
    ZDB-ID 282732-3
    ISSN 1879-0003 ; 0141-8130
    ISSN (online) 1879-0003
    ISSN 0141-8130
    DOI 10.1016/j.ijbiomac.2017.11.179
    Database NAL-Catalogue (AGRICOLA)

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  9. Article ; Online: Effect of Curcumin on the Hypothalamus Levels of the Potent Inhibitory Neurotransmitter ,Gamma aminobutyric acid

    Shokoufe Nikpour Moghaddam / Durdi Qujeq / Ali Asghar Rastegari Efahani / Shaghayeq Nikpour Moghaddam

    Research in Molecular Medicine, Vol 3, Iss 1, Pp 22-

    2015  Volume 25

    Abstract: Background: There are some reports in the literature showing that hypothalamus synthesizes and secretes amino acid neurotransmitters. According to several studies, elevated serum levels of gamma-amino butyric acid (GABA), a potent inhibitory ... ...

    Abstract Background: There are some reports in the literature showing that hypothalamus synthesizes and secretes amino acid neurotransmitters. According to several studies, elevated serum levels of gamma-amino butyric acid (GABA), a potent inhibitory neurotransmitter, have recently been implicated in the pathogenesis of neural diseases. The purpose of this research was to estimate the effects of curcumin on GABA’s level in rat's hypothalamus. Materials and Methods: We used a standard animal model of rats (n=18) with mean weight 190-210 g, to determine the effects of administration of curcumin at the end of the experimental period, one week, two weeks, four weeks and eight weeks ,at doses of 250 mg/kg and 625 mg/kg on GABA level in hypothalamus. On the day of experiment, hypothalamus was extracted and homogenized through a 10 -µm filter, rinsed with PBS, re-filtered, and centrifuged at 1200 rpm for 15 min. Then rat hypothalamus was weighed, and homogenized (10% w/v) in 0.1 M PBS with poltroon homogenizer at pH 7.4. Homogenates were used immediately for determination of GABA level. Quantifications of GABA in all samples were performed by enzymatic method. Results: Our results indicate that curcumin has a potential to increase GABA content in the rats' hypothalamus. These results suggest that curcumin holds promise as a natural agent to control or decrease the signs of lack of GABA level. Conclusion: Curcumin may be used clinically as a neuro-protective drug for treatment of patients suffering from neuron damage.
    Keywords Curcumin ; gamma-aminobutyric acid ; hypothalamus ; Medicine (General) ; R5-920
    Subject code 630
    Language English
    Publishing date 2015-01-01T00:00:00Z
    Publisher Mazandaran University of Medical Sciences and Health Services
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  10. Article ; Online: Optimization of exopectinase activity of the fungus Monilia isolated from tangerine in submerged fermentation

    Nafiseh Sadat Naghavi / Saeide Naderi / Kahin Shahanipoor / Mohammad Ali Zia / Ali Asghar Rastegari Esfahani

    Biological Journal of Microorganism, Vol 1, Iss 1, Pp 23-

    2012  Volume 30

    Abstract: Introduction: Diverse groups of microscopic fungi are able to degrade polymeric plant tissues such as pectin. Biodegradation of these materials are mostly applicable in food industries.Materials and Methods: In the present study, the exopectinase ... ...

    Abstract Introduction: Diverse groups of microscopic fungi are able to degrade polymeric plant tissues such as pectin. Biodegradation of these materials are mostly applicable in food industries.Materials and Methods: In the present study, the exopectinase producing fungus was isolated from decaying tangerine and its exopectinase activity was studied in submerged fermenting condition. Also, the enzyme production of the isolated fungus was compared to the industrial fungus, Aspergillus niger PTCC 5013. The exopectinase production and activity of the extracted enzyme solution with respect to pH, temperature, activity timing and substrate concentration were scrutinized.Results: According to the morphological macroscopic and microscopic features, the isolated fungus was identified as the genus Monilia in the Moniliaceae family. The best exopectinase production was in pH 7 and the best enzyme activity achieved at 50°C, in 30 to 40 minute, 1.5% substrate and the 1:1 of the enzyme solution to the substrate solution ratio. The isolated fungus, Monilia, was fast growing and produced highly active exopectinase enzyme. In optimum condition, its exopectinase activity was 20 units higher than the fungus Aspergillus niger PTCC 5013. Discussion and Conclusion: The exopectinase enzyme was active in a wide ranges of pH and temperatures. As Monilia does not produce toxic compounds, it is proposed for pectinase production, especially in the food industries.
    Keywords Exopectinase ; Optimization ; The fungus Monilia ; tangerine ; Biology (General) ; QH301-705.5 ; Science ; Q ; DOAJ:Biology ; DOAJ:Biology and Life Sciences
    Subject code 571 ; 660
    Language Persian
    Publishing date 2012-01-01T00:00:00Z
    Publisher University of Isfahan
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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