Synthesis of sulfadiazinyl acyl/aryl thiourea derivatives as calf intestinal alkaline phosphatase inhibitors, pharmacokinetic properties, lead optimization, Lineweaver-Burk plot evaluation and binding analysis

Sajid-ur-Rehman,Saeed, Aamer,Saddique, Gufran,Ali Channar, Pervaiz,Ali Larik, Fayaz,Abbas, Qamar,Hassan, Mubashir,Raza, Hussain,Fattah, Tanzeela Abdul,Seo, Sung-Yum Elsevier 2018 Bioorganic & medicinal chemistry Vol.26 No.12

<P><B>Abstract</B></P> <P>To seek the new medicinal potential of sulfadiazine drug, the free amino group of sulfadiazine was exploited to obtain acyl/aryl thioureas using simple and straightforward protocol. Acyl/aryl thioureas are well recognized bioactive pharmacophore containing moieties. A new series (<B>4a</B>–<B>4j</B>) of sulfadiazine derived acyl/aryl thioureas was synthesized and characterized through spectroscopic and elemental analysis. The synthesized derivatives <B>4a</B>–<B>4j</B> were subjected to calf intestinal alkaline phosphatase (CIAP) activity. The derivative <B>4a</B>–<B>4j</B> showed better inhibition potential compared to standard monopotassium phosphate (MKP). The compound <B>4c</B> exhibited higher potential in the series with IC<SUB>50</SUB> 0.251 ± 0.012 µM (standard KH<SUB>2</SUB>PO<SUB>4</SUB> 4.317 ± 0.201 µM). Lineweaver-Burk plots revealed that most potent derivative <B>4c</B> inhibition CIAP via mixed type pathway. Pharmacological investigations showed that synthesized compounds <B>4a</B>–<B>4j</B> obey Lipinsk’s rule. ADMET parameters evaluation predicted that these molecule show significant lead like properties with minimum possible toxicity and can serve as templates in drug designing. The synthetic compounds show none mutagenic and irritant behavior. Molecular docking analysis showed that compound <B>4c</B> interacts with Asp273, His317 and Arg166 amino acid residues.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Sulfadiazine based acyl/aryl thioureas has been synthesized and were screen against calf intestinal alkaline phosphatase (CIAP). </LI> <LI> Compound <B>4c</B> was found to be potent derivative in the series. </LI> <LI> Lineweaver-Burk plots revealed mixed type of enzyme inhibition mechanism. </LI> <LI> All the derivatives <B>4a</B>–<B>4j</B> obey Lipinski’s Rule. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

Significance of encapsulating organic temperature sensors through spatial atmospheric atomic layer deposition for protection against humidity

Mutee ur Rehman, Mohammad,Muqeet Rehman, Muhammad,Sajid, Memoon,Lee, Jae-Wook,Na, Kyoung Hoan,Ko, Jeong Beom,Choi, Kyung Hyun Springer-Verlag 2018 Journal of materials science Materials in electron Vol.29 No.17

Phenolic compounds as biochemical markers of senescence in woody ornamental flowers of Malus crabapple

Rana Naveed Ur Rehman,Yaohua You,Sajid Ali,Yule Wang,Lei Zhang,Pengmin Li,Fengwang Ma 한국원예학회 2018 Horticulture, Environment, and Biotechnology Vol.59 No.1

Polyphenol intermediates accumulate predominantly in peripheral parts of floral tissues and play various roles in tissuehomeostasis. A limited ornamental flower shelf life is caused by early tissue senescence, otherwise known as programmedcell death (PCD), which is characterized by processes such as DNA degradation, reduction in protein content and others. However, the role of polyphenols during PCD is poorly understood. In this study, we evaluated polyphenols as potentialbiochemical markers during developmental changes associated with PCD. Malus crabapple flowers were exposed to low(LT = 13 ± 2 °C), room (RT = 23 ± 2 °C), and high (HT = 30 ± 2 °C) temperatures to induce different levels of PCD. HTtreatment was associated with enhanced H2O2and MDA content, which subsequently caused lower protein concentrationand induced DNA degradation. Conversely, substantially higher protein content, lesser DNA degradation, and lower H2O2and MDA accumulation were observed following RT and LT treatments. Furthermore, significantly higher concentrationsof phenolic acids, flavanols, and anthocyanins were observed following both RT and LT treatments, more so for the latter,due to up-regulation of structural genes such as MpPAL, MpDFR, MpLDOX, and MpUFGT. Similarly, following HT treatmentthat induced a higher rate of PCD, the accumulation of dihydrochalcone and flavonols was significantly enhanced andassociated with increased expression of MpCHS and MpFLS. Phenolic contents are determined via precise regulation of ahighly conserved set of structural genes, indicating their functional importance. Therefore, it was assumed that individualphenolic intermediates or discrete diverse classes of polyphenol compounds may be utilized as biochemical markers of PCDin woody ornamental flowers of Malus crabapple.

Encapsulation of polyvinyl alcohol based flexible temperature sensor through spatial atmospheric atomic layer deposition system to enhance its lifetime

Kim, Soo Wan,Rehman, Muhammad Muqeet,Sajid, Memoon,Rehman, Mohammad Mutee ur,Gul, Jahanzeb,Jo, Jeong Dai,Choi, Kyung Hyun Elsevier 2019 THIN SOLID FILMS - Vol.673 No.-

<P><B>Abstract</B></P> <P>Printed organic sensors are of significant importance owing to their simplicity, low cost, easy fabrication and solution processability. However, organic sensors often suffer from the drawback of performance degradation when exposed to ambient environment. In this study, polyvinyl alcohol (PVA) is used as the functional layer of a temperature sensor and is encapsulated by aluminum oxide (Al<SUB>2</SUB>O<SUB>3</SUB>) deposited through spatial atmospheric atomic layer deposition system (SAALD). The encapsulating layer of Al<SUB>2</SUB>O<SUB>3</SUB> was pure, atomically thin and highly reliable. Fabricated organic temperature sensor is based on a conductive and uniform interdigitated pattern deposited on a flexible polyethylene naphthalate substrate through advanced printing technology of reverse offset. Thin film of PVA is used as the temperature sensitive functional layer deposited through electrohydrodynamic atomization followed by Al<SUB>2</SUB>O<SUB>3</SUB> encapsulation. The developed sensors were tested in the temperature range of 25 °C to 90 °C with relative humidity reaching up to 75% relative humidity. The obtained results exhibited that Al<SUB>2</SUB>O<SUB>3</SUB> encapsulation deposited through SAALD significantly enhanced the linearity, repeatability, endurance (50 cycles), retention (2 months) and lifetime of PVA based temperature sensor as compared with the non-encapsulated sensor hence, protecting the organic device from performance degradation.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Lifetime of organic temperature sensor has been enhanced through encapsulation. </LI> <LI> Electrical, mechanical, chemical, and morphological characterizations are included. </LI> <LI> The device is encapsulated with Al<SUB>2</SUB>O<SUB>3</SUB> thin film deposited through SAALD system. </LI> <LI> Encapsulated sensor displayed better results than non-encapsulated sensor. </LI> <LI> The obtained results were highly stable and reproducible. </LI> </UL> </P>

Phenol removal and hydrogen production from water: Silver nanoparticles decorated on polyaniline wrapped zinc oxide nanorods

Asim Jilani,Mohammad Omaish Ansari,Ghani ur Rehman,Muhammad Bilal Shakoor,Syed Zajif Hussain,Mohd Hafiz Dzarfan Othman,Sajid Rashid Ahmad,Mohsin Raza Dustgeer,Ahmed Alshahrie 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.109 No.-

The toxic and carcinogenic organic compounds discharge from industries, contaminate the natural reservoirsof water and air which eventually pose a global threat not only to the aquatic life but also to thehumanity. Herein, ternary nanocomposites of silver-nanoparticle (AgNPs)-decorated on polyaniline(Pani)-wrapped zinc oxide nanorods (AgNPs@Pani/ZnO) were prepared via a facile approach. Thenanocomposite degraded 97.91% phenol with an optimized dosage and concentration of H2O2. Moreover, the apparent rate constant for phenol degradation was 3.69 times higher than for pure ZnOnanorods. The hydrogen production from AgNPs@Pani/ZnO was 1.58 and 2.74 times higher than Pani/ZnO and ZnO, respectively. The enhanced phenol degradation and hydrogen production is attributed tothe transfer of holes to the Pani, from which the electrons were transferred to the conduction band ofZnO and eventually to the conduction band of the AgNPs, where they accelerated the redox reactionsfor rapid photolysis of water and phenol. The concentration of the catalyst dosage affected the rate ofphenol degradation. Further, response surface methodology was also applied in order to design 13 setsof random experiments in which the catalyst dosage and degradation time were varied to predict thephenol degradation.