Hanan Ahmed

ORCID: 0000-0003-0854-9244
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About
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Research Areas
  • Metal complexes synthesis and properties
  • Organometallic Compounds Synthesis and Characterization
  • Asthma and respiratory diseases
  • Porphyrin and Phthalocyanine Chemistry
  • IL-33, ST2, and ILC Pathways
  • Food Allergy and Anaphylaxis Research
  • Metabolomics and Mass Spectrometry Studies
  • Metal-Catalyzed Oxygenation Mechanisms
  • Dermatology and Skin Diseases
  • Crystal structures of chemical compounds
  • Respiratory viral infections research
  • Nonlinear Optical Materials Research
  • Synthesis and Characterization of Heterocyclic Compounds
  • Inorganic and Organometallic Chemistry
  • Vanadium and Halogenation Chemistry
  • Metabolism and Genetic Disorders
  • Allergic Rhinitis and Sensitization
  • Oxidative Organic Chemistry Reactions
  • RNA and protein synthesis mechanisms
  • Immunodeficiency and Autoimmune Disorders
  • Pediatric health and respiratory diseases
  • Eosinophilic Esophagitis
  • Polyoxometalates: Synthesis and Applications

McMaster University
2019-2023

Sohag University
2018-2022

University of Alberta
2016

Three new Cu (II), Pd (II) and Ag (I) complexes of bidentate Schiff base ligand 2‐[(4‐chlorobenzylidene)amino] phenol (HL) were synthesized. The stoichiometric ratios physicochemical properties these determined using elemental analyses, magnetic measurements, infrared UV–visible spectra, molar conductivity measurements thermal analyses. results revealed that the metal ions coordinated with through azomethine nitrogen phenolic oxygen atoms. AgL PdL are present in a 1:1 ratio square planar...

10.1002/aoc.4527 article EN Applied Organometallic Chemistry 2018-10-12
Mehul Sharma Daniel Leung Mana Momenilandi Lauren C.W. Jones Lucia Pacillo and 89 more Alyssa James Jill R. Murrell Selket Delafontaine Jesmeen Maimaris Maryam Vaseghi‐Shanjani Kate L. Del Bel Henry Y. Lu Gilbert T. Chua Silvia Di Cesare Oriol Fornés Zhongyi Liu Gigliola Di Matteo Maggie P. Fu Donato Amodio Issan Yee San Tam Gavin S.W. Chan Ashish Sharma Joshua Dalmann Robin van der Lee Géraldine Blanchard-Rohner Susan Lin Quentin Philippot Phillip A. Richmond Jessica J. Lee Allison Matthews Michael Seear Alexandra K. Turvey Rachael L. Philips Terri F. Brown‐Whitehorn Christopher Gray Kosuke Izumi James R. Treat Kathleen H. Wood Justin Lack Asya Khleborodova Julie E. Niemela Xingtian Yang Rui Liang Lin Kui C. S. M. Wong Grace Wing-kit Poon Alexander Hoischen Caspar I. van der Made Jing Yang Koon Wing Chan Jaime S. Rosa Duque Pamela Lee M. Ho Brian Hon‐Yin Chung Huong Thi Minh Le Wanling Yang Pejman Rohani Ali Fouladvand Hassan Rokni‐Zadeh Majid Changi‐Ashtiani Mohammad Miryounesi Anne Puel Mohammad Shahrooei Andrea Finocchi Paolo Rossi Beatrice Rivalta Cristina Cifaldi Antonio Novelli Chiara Passarelli Stefania Arasi Dominique Bullens Kate Sauer Tania Claeys Catherine M. Biggs Emma Morris Sergio D. Rosenzweig John J. O’Shea Wyeth W. Wasserman H. Melanie Bedford Clara D.M. van Karnebeek Paolo Palma Siobhan O. Burns Isabelle Meyts Jean‐Laurent Casanova Jonathan J. Lyons Nima Parvaneh Anh Thi Van Nguyen Caterina Cancrini Jennifer Heimall Hanan Ahmed Margaret L. McKinnon YL Lau Vivien Béziat Stuart E. Turvey

STAT6 (signal transducer and activator of transcription 6) is a factor that plays central role in the pathophysiology allergic inflammation. We have identified 16 patients from 10 families spanning three continents with profound phenotype early-life onset immune dysregulation, widespread treatment-resistant atopic dermatitis, hypereosinophilia esosinophilic gastrointestinal disease, asthma, elevated serum IgE, IgE-mediated food allergies, anaphylaxis. The cases were either sporadic (seven...

10.1084/jem.20221755 article EN cc-by The Journal of Experimental Medicine 2023-03-08

Herein, we report facile procedures for synthesis of a new Schiff base ligand (H2L,5-Diethylamino-2-({2-[(2-hydroxy-benzylidene)-amino]-phenylimino}-methyl)-phenol) and its Ag(I), Pd(II) Cu(II) complexes. The structure the H2L as well metal complexes was deduced based on wide range analytical, structural spectroscopic tools, along with theoretical evidence via density functional theory (DFT) calculations. obtained results indicated that (H2L) acts tetradentate N2O2 donor two azomethine...

10.3390/molecules25215089 article EN cc-by Molecules 2020-11-02

The new Schiff base ligand 2,2′-{(4-chloro-1,2-phenylene)bis(nitrilo(E)methylylidene)}bis(4-bromophenol) (H2L) and its VO(II), Zn(II) ZrO(II) metal chelates have been synthesized characterized by spectral, powder x-ray diffraction (PXRD), molar conductance, magnetic measurements, thermal elemental analyses. molecular geometry of the prepared compounds has confirmed applying theoretical density functional theory calculations (DFT). analytical data showed that parent azomethine H2L binds to...

10.1016/j.arabjc.2022.103737 article EN cc-by-nc-nd Arabian Journal of Chemistry 2022-01-29

Sensitization to common environmental aeroallergens plays a significant role in the pathogenesis and severity of respiratory allergic disorders, specifically asthma rhinitis. Understanding sensitization patterns helps clinicians tailor care more effectively. This study examines subjects suspected having an disease Edmonton catchment area.Retrospective chart review skin prick test (SPT) results 11 performed between January 1st June 30th 2014 at University-based clinic, where patients are...

10.1186/s13223-019-0320-y article EN cc-by Allergy Asthma and Clinical Immunology 2019-02-13
Marie-Ève Côté Marie‐Ève Boulay Sophie Plante Jamila Chakir Louis‐Philippe Boulet and 95 more Hanan Ahmed Maria-Beatriz Ospina Kyriaki Sideri Harissios Vliagoftis Sara F. Johnson Roberta L. Woodgate Guilhem Cros Pierre Teira Sonia Cellot Henrique Bittencourt Hélène Decaluwe Marie France Vachon Michel Duval Élie Haddad Vy H.D. Kim Anne Pham‐Huy Eyal Grunebaum John-Paul Oliveria Stephanie Phan Mark W. Tenn Damian Tworek Steven G. Smith Adrian J. Baatjes Caitlin Obminski Caroline Munoz Tara Scime Roma Sehmi Gail M. Gauvreau Brittany Salter Steven G. Smith Caitlin Obminski Caroline Munoz Abbey Schlatman Tara Scime Rick Watson Roya Sherkat Razieh Khoshnevisan Saba Sheikhbahaei Stephen Betschel Richard Warrington R. Robert Schellenberg Michael Fein Jean-Philippe Pelletier Manstein Kan Roxane Labrosse Raymond Mak James Loh Amin Kanani Dominik Alex Nowak Paul K. Keith Daniel Pannozzo Hermenio Lima Diana Pham Hoang Pham Gonzalo G. Alvarez Istvan T. Bencze Krishna Sharma Mark D. Smith Shawn D. Aaron Jennifer Block Tara Keays Judith A. Leech David Schneidermen Jodi Cameron Jennifer Forgie Alicia Ring John W. O’Quinn Stephanie Santucci William H. Yang Ena Gaudet Shawn D. Aaron Mathew Voisin Rozita Borici‐Mazi Kateryna Vostretsova Donald Stark Elizabeth Yeboah Michelle Martin‐Rhee Cheryl Gula Clare Cheng Geoff Paltser Alizée Dery Ann E. Clarke Kari C. Nadeau Laurie Harada Kimberley Weatherall Celia M.T. Greenwood Denise Daley Yuka Asai Moshe Ben‐Shoshan Ling Ling Maria B. Ospina Jennifer L. P. Protudjer Mirja Vetander Marianne van Hage Ola Olén

A1 Role of fibrocytes in allergic rhinitis Marie-Ève Côté, Boulay, Sophie Plante, Jamila Chakir, Louis-Philippe Boulet A2 Patterns aeroallergens sensitization Northern Alberta Hanan Ahmed, Maria-Beatriz Ospina, Kyriaki Sideri, Harissios Vliagoftis A3 Addressing acceptable risk for adolescents with Food-Induced Anaphylaxis (FIA) Sara F. Johnson, Roberta L. Woodgate A4 Outcomes matched related and unrelated bone marrow transplantation after reduced-toxicity conditioning children suffering from...

10.1186/s13223-016-0118-0 article EN cc-by Allergy Asthma and Clinical Immunology 2016-05-01

Phenylketonuria (PKU) is a relatively common autosomal recessive disorder. The frequency of PKU among Caucasians populations approximately 1:10.000. primarily consequence deficiency in phenylalanine hydroxylase (PAH) activity, and un-treated patients develop severe mental retardation. absence this enzymatic activity causes disturbances tyrosine tryptophan metabolism diminished formation catecholamine (dopamine), melanin serotonin. In the present study, nucleotide sequence mutations were...

10.5455/egyjebb.20190804010102 article EN THE EGYPTIAN JOURNAL OF EXPERIMENTAL BIOLOGY (Botany) 2019-01-01

ABSTRACT STAT6 (Signal transducer and activator of transcription 6) is a factor that plays central role in the pathophysiology allergic inflammation. mediates biological effects IL-4, cytokine necessary for type 2 differentiation T cells B cell survival, proliferation class switching to IgE. We have identificated two unrelated patients with phenotype notable their early-life onset profound immune dysregulation, widespread treatment-resistant atopic dermatitis, hypereosinophilia esosinophilic...

10.1101/2022.04.25.22274265 preprint EN cc-by-nc-nd medRxiv (Cold Spring Harbor Laboratory) 2022-04-28
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