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Inamullah Khan Muhammad Nisar Armando Zarrelli Giovanni Di Fabio Farah Gul Syed Naeemuddin Gilani Muhammad Raza Shah Amir Zada Khan Samiullah Hazrat Amin 《Medicinal chemistry research》2013,22(12):5809-5813
Lipoxygenase (LOX) inhibitors are well known for their anti-inflammatory effects derived from both natural products and synthetic sources. Taxus wallichiana Zucc is traditionally used in the treatment of various diseases including inflammation. In a recent study, it was used to conduce the isolation of the bioactive compounds from Taxus wallichiana Zucc. thanks to its ethnopharmacological use in diseases including inflammation. Phytochemical studies lead to the isolation of abietane diterpenoids, namely Taxusabietane C (TC) and Taxamairin F (TF). Test compounds showed significant LOX inhibitory effects. IC50 values of TC and TF were 69 ± 0.31 and 73 ± 0.14 μM, respectively. The standard compound Baicalein and Tenidap sodium showed the IC50 value being 22.1 ± 0.03 and 41.6 ± 0.02 μM. Significant LOX inhibitory activities were supported by a molecular docking simulation to explore molecular interactions of the compounds with the active (catalytic) site of LOX. 相似文献
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Tianyu Liu Xueli Song Samiullah Khan Yun Li Zixuan Guo Chuqiao Li Sinan Wang Wenxiao Dong Wentian Liu Bangmao Wang Hailong Cao 《International journal of cancer. Journal international du cancer》2020,146(7):1780-1790
The prevalence of colorectal cancer (CRC) has markedly increased worldwide in the last decade. Alterations of bile acid metabolism and gut microbiota have been reported to play vital roles in intestinal carcinogenesis. About trillions of bacteria have inhabited in the human gut and maintained the balance of host metabolism. Bile acids are one of numerous metabolites that are synthesized in the liver and further metabolized by the gut microbiota, and are essential in maintaining the normal gut microbiota and lipid digestion. Multiple receptors such as FXR, GPBAR1, PXR, CAR and VDR act as sensors of bile acids have been reported. In this review, we mainly discussed interplay between bile acid metabolism and gut microbiota in intestinal carcinogenesis. We then summarized the critical role of bile acids receptors involving in CRC, and also addressed the rationale of multiple interventions for CRC management by regulating bile acids–microbiota axis such as probiotics, metformin, ursodeoxycholic acid and fecal microbiota transplantation. Thus, by targeting the bile acids–microbiota axis may provide novel therapeutic modalities in CRC prevention and treatment. 相似文献
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Shaikh Samiullah Devrajani Bikharam Nasreen 《World journal of gastroenterology : WJG》2012,18(40):5793-5798
AIM:To observe the efficacy of peg-interferon in the treatment of hepatitis delta virus(HDV) and to identify the factors that would be predictive of the sustained viral response(SVR).METHODS:This prospective study was conducted in Medical Unit Ⅳ of the Liaquat University of Medical and Health Sciences Hospital Jamshoro from June 2008 to September 2011.This study cohort included all patients of either sex who presented during this time with hepatitis B surface antigen positivity,hepatitis B virus DNA 20 000 IU/mL,serum glutamic pyruvic transaminase(SGPT) 2(upper limit of normal),HDV-RNA positivity with fibrosis stage ≥ 2.Informed consent was obtained from each of these individuals.Patients were diagnosed with hepatitis D on the basis of detectable viral antibodies and the presence of HDV-RNA in their serum.A liver biopsy was performed in all cases and fibrosis staging was performed in accordance with the METAVIR scoring system.All eligible patients were administered peg-interferon at a weekly dosage of 1.5 g/kg body weight for 48 wk.HDV-RNA was assayed at the end of this treatment period and again at 24 wk later.A biochemical response was determined by a normalization of SGPT at the end of the treatment or during follow up.The end of treatment response was defined by a HDV-RNA negative status.A sustained virological response was defined by undetectable serum HDV-RNA at six months after the end of treatment.RESULTS:Among the 277 patients enrolled in our present study,238 completed a course of peg-interferon therapy of which 180(75.6%) were male and 58(24.4%) female.Biochemical responses were achieved in 122/238(51.3%) patients.End of treatment responses were achieved in 71/238(29.8%) cases.A SVR was achieved in 70 of these patients(29.4%).A strong association was found between the SVR and the end of treatment responses(P = 0.001),biochemical responses(P = 0.001) and the degree of fibrosis(P = 0.002).CONCLUSION:Peg-interferon therapy can induce remission in nearly one third of patients harboring HDV. 相似文献
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Saowaluck Tibpromma Kevin D. Hyde Eric H. C. McKenzie D. Jayarama Bhat Alan J. L. Phillips Dhanushka N. Wanasinghe Milan C. Samarakoon Ruvishika S. Jayawardena Asha J. Dissanayake Danushka S. Tennakoon Mingkwan Doilom Rungtiwa Phookamsak Alvin M. C. Tang Jianchu Xu Peter E. Mortimer Itthayakorn Promputtha Sajeewa S. N. Maharachchikumbura Samiullah Khan Samantha C. Karunarathna 《Fungal Diversity》2018,88(1):1-165
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Samiullah Hidayatullah Nisar H. Dar Faisal Haque S. A. Hasan 《Indian journal of otolaryngology and head and neck surgery》2006,58(3):279-281
Foreign bodies lodged in aerodigestive tract makes the commonest emergency in the otorhinolaryngology clinics. Diagnosis often becomes difficult with parental ignorance and lack of clear history. Patients with foreign body can have unusual presentations. 相似文献
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The aim of the current study was to assess any effect of wild and vaccine Australian infectious bronchitis virus (IBV) strains on shell colour in brown-shelled eggs. In Experiment 1, eggs were collected from day 1 to day 13 post-inoculation (p.i.) from unvaccinated laying hens challenged with IBV wild strains T and N1/88 and from a negative control group of hens. In Experiment 2, eggs were collected from 2 to 22 days p.i. from unvaccinated and vaccinated laying hens challenged with either a wild or a vaccine strain of IBV. In Experiment 1, there was a significant effect (P?0.05) of day p.i. and of viral strain on shell reflectivity, L* and protoporphyrin IX (PP IX) in eggshells, with and without cuticle. The mean PP IX/g of shell with and without cuticle was significantly higher on day 1 p.i. compared to day 7, after which PP IX increased with day p.i. In Experiment 2, shell reflectivity and L* increased and PP IX decreased with increased day p.i. until day 12. Shell reflectivity and L* decreased slightly after day 12 and increased again towards day 22. Shell reflectivity, L* and PP IX were not significantly different for eggshells from unvaccinated and vaccinated laying hens in the intact eggshell, but were significantly different in shells from which cuticle had been removed. In conclusion, the IBV strains reduced the intensity of brown shell colour to different extents with a lower amount of PP IX in eggshells. 相似文献
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Samiullah Khan Mahmood Ahmad Mohammad Sohail 《Journal of biomaterials science. Polymer edition》2018,29(1):1-34
This study aimed to design a novel thermoreversible compact self-assembled host macromolecule based on β-cyclodextrin and low molecular weight ethylene glycol with a difunctional guest molecule i.e. poly (ethylene oxide)-poly (propylene oxide)-poly (ethylene oxide) tri-block co-polymer (Pluronic® 127) through host-guest inclusion complexation in aqueous media using cold method. The injectable thermoreversible self-assembled supramolecular hydrogel was developed to encapsulate hydrophobic curcumin as anti-malignant agent and for controlled delivery to systemic circulation after in vivo application through subcutaneous route. As reversible supramolecular assembly, the thermoresponsive gels showed a unique structure-related reversible gel to sol transition above and below LCST determined via tube titling method. The rheological measurements of the supramolecular hydrogels showed a viscoelastic structure. Optical transmittance of supramolecular assembly also confirmed the thermoreversible sol–gel transitions. The strong potential of supramolecular assembly as injectable controlled delivery was assessed using curcumin as model active pharmaceutical ingredient for in vitro release experiments. The release experiments conducted in various dissolution medias and at different temperature programs showed maximum curcumin release in phosphate buffer solution (7.4) at 35 °C. methyl thiazolyl tetrazolium assay was used to assess the safety and efficacy of self-assembled supramolecular injectable hydrogels. In vitro cytotoxicity study showed that blank supramolecular gels are non-toxic to the L929 cells. While curcumin released from supramolecular injectable hydrogels (Cur-β-CD/EG-PF127) has the ability to show pharmacological activity and kill the cancer cells. Furthermore the formation of channel type inclusion complex was studied through Fourier transformed infra-red spectroscopy, X-ray diffraction, thermogravimetric analysis, differential scanning calorimetric and scanning electron microscopic analysis. 相似文献
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