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Mir, Manzoor R.,Shabir, Nadeem,Wani, Khursheed A.,Shaffi, Sheikh,Hussain, Ishraq,Banday, Manzoor A.,Chikan, Naveed A.,Bilal, S.,Aejaz, Sheikh Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.1
The aim of this study was to evaluate the methylation status of three important cancer related genes viz. p16, E-cadherin and hMLH1 promoters and to associate the findings with specific dietary habits in Kashmiris, a culturally distinct population in India, with gastric cancer. The study subjects were divided into three age groups viz. 0-30yrs ($1^{st}$), 31-60yrs ($2^{nd}$) and 61-90yrs ($3^{rd}$). A highly significant association between the intake of local hot salted tea in $2^{nd}$ (p=0.001) and $3^{rd}$ (p=0.009) age groups was observed with the promoter hypermethylation of E cadherin. Again a highly significant association between the aberrant methylation of hMLH1 (p=0.000) and p16 (p=0.000) promoters and the intake of local hot salted tea was observed in the $2^{nd}$ age group of gastric cancer patients. The intake of sun-dried food was also significantly associated with the promoter hypermethylation of E cadherin (p=0.003) and p16 (p=0.015) genes in $3^{rd}$ age group. The results of the present study suggest a close association between the aberrant methylation of p16, E-cadherin and hMLH1 promoters and the intake of local hot salted tea and sun-dried foods in Kashmiri population.
Lee, D.S.,Lee, E.S.,Alam, Md.M.,Jang, J.H.,Lee, H.S.,Oh, H.,Kim, Y.C.,Manzoor, Z.,Koh, Y.S.,Kang, D.G.,Lee, D.H. W.B.Saunders [etc.] 2016 clinical and experimental Vol.65 No.2
Objective: Studies have shown that dipeptidyl peptidase-4 (DPP-4) inhibitors have anti-inflammatory effects. Soluble DPP-4 (sDPP-4) has been considered as an adipokine of which actions need to be further characterized. Methods: We investigated the pro-inflammatory actions of sDPP-4 and the anti-inflammatory effects of DPP-4 inhibition, using vildagliptin, as an enzymatic inhibitor, and mannose-6-phosphate (M6P) as a competitive binding inhibitor. Results: In lipopolysaccharide (LPS)-stimulated RAW264.7 cells, vildagliptin suppressed the increased expression of inducible nitric oxide synthase (iNOS) and phosphorylated JNK (pJNK), activation of the NF-κB pathway, and the resultant NO and proinflammatory cytokine production. Although sDPP-4 alone did not affect the protein level of iNOS or pJNK or the production of NO in RAW264.7 cells, it did amplify iNOS expression, NO responses, and proinflammatory cytokine production in LPS-stimulated RAW264 cells. As a probable mechanism, we found that sDPP-4 caused dose-dependent increases in the expression levels of toll-like receptor 4 (TLR4) and TLR2 in RAW264.7 cells, and that these alterations were inhibited by vildagliptin, M6P, or bisindolylmaleimide II, a protein kinase C inhibitor. Either vildagliptin or M6P suppressed iNOS expression and NO and cytokine production in LPS+DPP-4-co-stimulated macrophages, while combined treatment of the co-stimulated cells with both agents had increased anti-inflammatory effects compared with either treatment alone. Intravenous injection of sDPP-4 to C57BL/6J mice increased the expression of both TLRs in kidney and white adipose tissues. Conclusion: Our findings suggest that sDPP-4 enhances inflammatory actions via TLR pathway, while DPP-4 inhibition with either an enzymatic or binding inhibitor has anti-inflammatory effects.
Facile synthesis of rGO/PANI/ZnO ternary nanocomposites for energy storage devices
Abbas Sajid,Elqahtani Zainab Mufarreh,Yasmeen Ghazala,Manzoor Suryyia,Manzoor Sumaira,Al-Buriahi M. S.,Alrowaili Z. A.,Ashiq Muhammad Naeem 한국세라믹학회 2023 한국세라믹학회지 Vol.60 No.1
Due to the dire energy needs and the unavailability of energy storage devices, supercapacitors have become an inescapable substitute for energy storage systems. As a high energy density electrode material, we offer rGO/PANI/ZnO ternary nanocomposite designed via the polymerization method and are characterized by various analytical techniques. The results show that rGO/PANI/ZnO has the best capacitive behavior, with a specific capacity of 1546 F/g at 2 mV/s on the eggshell membrane electrode (ESME). The nanocomposite rGO/PANI/ZnO, on the other hand, presented the best cycling stability, retaining 97% of capacity after 3000 cycles. This is due to the fast transfer of electrons between rGO/ZnO and PANI in an electrochemical charge storage device. This research encompasses an enhanced flexible PANI-based electrode to become viable innovative wearable sensor alternative.
Ruin Theory for Dynamic Spectrum Allocation in LTE-U Networks
Manzoor, Aunas,Tran, Nguyen H.,Saad, Walid,Kazmi, S. M. Ahsan,Pandey, Shashi Raj,Hong, Choong Seon IEEE 2019 IEEE COMMUNICATIONS LETTERS Vol.23 No.2
<P>LTE in the unlicensed band (LTE-U) is a promising solution to overcome the scarcity of the wireless spectrum. However, to reap the benefits of LTE-U, it is essential to maintain its effective coexistence with WiFi systems. Such a coexistence, hence, constitutes a major challenge for LTE-U deployment. In this letter, the problem of unlicensed spectrum sharing among WiFi and LTE-U systems is studied. In particular, a fair time-sharing model based on the ruin theory is proposed to share redundant spectral resources from the unlicensed band with LTE-U without jeopardizing the performance of the WiFi system. Fairness among both WiFi and LTE-U is maintained by applying the concept of the probability of ruin. In particular, the probability of ruin is used to perform efficient duty-cycle allocation in LTE-U, so as to provide fairness to the WiFi system and to maintain certain the WiFi performance. Simulation results show that the proposed ruin-based algorithm provides better fairness to the WiFi system as compared to equal duty-cycle sharing among WiFi and LTE-U.</P>
Muhammad Sufyan,S. Manzoor,Nadeem A. Sheikh 대한기계학회 2015 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.29 No.4
Free stream flow and forced convection heat transfer across a rotating circular cylinder have been investigated numerically for therange of Reynolds number between 5 and 40 (5 ≤ Re ≤ 40). The non-dimensional rotation rate, α is employed upto a maximum value of 5. The governing equations namely, continuity, momentum, and energy equations have been solved in 2D steady laminar flow regime forthe range of Prandtl number between 0.7 and 67 (0.7 ≤ Pr ≤ 67). Uniform heat flux (UHF) and constant wall temperature (CWT) boundaryconditions have been considered, separately, for the range of afore mentioned parameters. New results are presented depicting thebehavior of temperature field around the cylinder rotating in a high Pr environment (Pr ≥ 33) with non-dimensional rotation rate in therange between 0 and 5 (0 ≤ α ≤ 5). It is noted that the heat transfer across the cylinder becomes increasingly independent of the thermalboundary condition i.e. UHF or CWT.
A modified non-linear model for high mass ratio square cylinder
Nadeem A. Sheikh,S. Manzoor,S. Khushnood 대한기계학회 2014 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.28 No.12
An improved analytical method for the modelling of vortex induced vibrations (VIV) of a square section cylinder is reported. Themethod is based on a typical structural oscillator coupled to a non-linear wake (Van der Pol) oscillator. Improvements are introduced tothe pre-existing analytical methods sorted out from the literature. Dissipation term in the structural oscillator model is modified by theaddition of a non-linear damping term. Definition of the wake oscillator is updated simultaneously to include stream-wise force componentexerted on the structure. Results show that our modified analytical method correctly predicts the location of peak lock-in amplitudeon the amplitude vs reduced-velocity map as observed in recent experiments. The range of lock-in is also reasonably well predicted. Themodified method shows that the influence of non-linear structural damping and stream-wise force components cannot be neglected whilemodelling high mass ratio systems.
Influence of Iron Doping on Structural, Optical and Magnetic Properties of TiO2 Nanoparticles
R. Zahid,M. Manzoor,A. Rafi q,M. Ikram,M. Nafees,A. R. Butt,S. G. Hussain,S. Ali 대한금속·재료학회 2018 ELECTRONIC MATERIALS LETTERS Vol.14 No.5
In this study, various concentrations of Fe doped TiO2nanoparticles have been successfully synthesized using the sol–gelmethod. A variety of characterization techniques as ultra-violet visible (UV–Vis) spectroscopy, X-ray diffractometer (XRD),vibrating sample magnetometry (VSM) and field emission scanning electron microscopy (FESEM) were employed to analyzethe prepared nanopowders. XRD measurement confirmed the substitution of Fe ion without disturbing the tetragonal crystalsystem of TiO2. The crystallite size was found to decrease and lattice strain increases upon doping estimated by WilliamsonHall plot. Furthermore, the average grain size calculated by FESEM found was between 10 and 30 nm for pure and dopedTiO2. UV–Vis spectroscopy showed an increase in absorption accompanied red shift and increase in band gap energies from3.36 to 3.62 eV with the addition of Fe. The FTIR spectroscopy was employed to confirm the presence of functional groupsin the fabricated nanopowders. Upon mixing the saturation magnetization (Ms) varying from (2.12 to 1.51)10−2 emu/g wasobserved.