Umar Saeed

ORCID: 0000-0003-0261-2767
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About
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Research Areas
  • Telomeres, Telomerase, and Senescence
  • Hepatitis B Virus Studies
  • Meteorological Phenomena and Simulations
  • Immunotherapy and Immune Responses
  • Hepatitis C virus research
  • Skin Protection and Aging
  • Atmospheric aerosols and clouds
  • SARS-CoV-2 and COVID-19 Research
  • Liver Disease Diagnosis and Treatment
  • Climate Change and Health Impacts
  • Global Health Care Issues
  • vaccines and immunoinformatics approaches
  • Wind and Air Flow Studies
  • Global Public Health Policies and Epidemiology
  • Bacteriophages and microbial interactions
  • Precipitation Measurement and Analysis
  • Climate variability and models
  • Hemoglobinopathies and Related Disorders
  • Cutaneous Melanoma Detection and Management
  • Advanced MIMO Systems Optimization
  • Iron Metabolism and Disorders
  • Retinal Imaging and Analysis
  • COVID-19 Clinical Research Studies
  • Retinal Diseases and Treatments
  • Cancer Research and Treatments

Institute for Health Metrics and Evaluation
2021-2024

University of Washington
2021-2024

Wenzhou Medical University
2024

Northern Sydney Local Health District
2024

The University of Sydney
2023-2024

Institute for Musculoskeletal Health
2024

Foundation University Islamabad
2023-2024

Foundation University
2024

Paracelsus Medical University
2023

Ajou University
2016-2023

The human sirtuin 2 gene ( SIRT2 ) encodes a full-length Sirt2 protein (i.e., the isoform 1), which primarily functions as cytoplasmic α-tubulin deacetylase, and promotes growth of hepatocellular carcinoma (HCC). Hepatitis B virus (HBV) replication itself, or HBV X (HBx) protein-mediated transcriptional transactivation, enhances Sirt2.1 expression; therefore, itself is capable positively increasing transcription replication. linked to liver fibrosis epithelial-to-mesenchymal transition and,...

10.3389/fcimb.2023.1234903 article EN cc-by Frontiers in Cellular and Infection Microbiology 2024-01-04

The purpose of this study was to build radiogenomics models from texture signatures derived computed tomography (CT) and 18F-FDG PET-CT (FDG PET-CT) images non-small cell lung cancer (NSCLC) with without epidermal growth factor receptor (EGFR) mutations.Fifty patients diagnosed NSCLC between 2011 2015 known EGFR mutation status were retrospectively identified. Texture features extracted pretreatment CT FDG by manual contouring the primary tumor used develop multivariate logistic regression...

10.1177/0846537119899526 article EN Canadian Association of Radiologists Journal 2020-02-17

Sirtuin 2 (Sirt2), a NAD+-dependent protein deacetylase, is overexpressed in many hepatocellular carcinomas (HCCs) and can deacetylate proteins, including tubulins AKT, prior to AKT activation. Here, we found that endogenous Sirt2 was upregulated wild-type hepatitis B virus (HBV WT)-replicating cells, leading tubulin deacetylation; however, this not the case HBV replication-deficient-mutant-transfected cells 1.3-mer WT-transfected reverse transcriptase inhibitor (entecavir or...

10.1128/jvi.00955-18 article EN Journal of Virology 2018-08-16

The HBx protein plays an essential regulatory role in HBV replication. We found that substrate-binding residues on the human parvulin peptidylprolyl cis / trans isomerase proteins Par14 and Par17 bound to conserved arginine-proline (RP) motifs cytoplasm, nucleus, mitochondria. HBx-Par14/Par17 interaction stabilized HBx; promoted its translocation nucleus mitochondria; stimulated multiple steps of replication, including cccDNA formation, RNA DNA synthesis, virion secretion. In addition,...

10.1128/jvi.01840-18 article EN Journal of Virology 2018-12-20

The efficacy of antibiotics and other antimicrobial agents in combating bacterial infections faces a grave peril the form resistance (AMR), an exceedingly pressing global health issue. emergence dissemination drug-resistant bacteria can be attributed to rampant overuse misuse antibiotics, leading dire consequences such as organ failure sepsis. Beyond realm individual health, pervasive specter AMR casts its ominous shadow upon economy society at large, resulting protracted hospital stays,...

10.3389/fmicb.2023.1270018 article EN cc-by Frontiers in Microbiology 2023-11-30

Human parvulin peptidyl prolyl cis/trans isomerases PIN1 and PIN4 play important roles in cell cycle progression, DNA binding, protein folding chromatin remodeling, ribosome biogenesis, tubulin polymerization. In this article, we found that endogenous were upregulated selected hepatocellular carcinoma (HCC) lines.In study, inhibited via inhibitors (Juglone, PiB, ATRA, 6,7,4'-THIF, KPT6566, EGCG). The native agarose gel electrophoresis (NAGE) immunoblotting analysis revealed upon and/ or...

10.3389/fmicb.2023.921653 article EN cc-by Frontiers in Microbiology 2023-01-25
William Xu Gordon Liu Chris Varghese Cameron I. Wells Nicolas P. Smith and 95 more John A. Windsor Lorane Gaborit Sarah Goh Aya Basam Muhammed Elhadi Rachel TingQian Soh Umar Saeed Eman Abdulwahed Michael Farrell Deborah Wright Jennifer Martin Peter Pockney William Xu Aya Basam Sarah Goh Jiting Li Jainil Shah A Waraich Lorane Gaborit Upasana Pathak Amie Hilder Muhammed Elhadi Aiden Jabur Kaviya Kalyanasundaram Christina Ohis C Ong Melissa Park Venesa Siribaddana Kyle Raubenheimer Jennifer Vu Cameron I. Wells Gordon Liu Liam Ferguson William Xu Chris Varghese Peter Pockney K Atherton Amanda Dawson Jennifer Martin A. Banerjee Nagendra N. Dudi‐Venkata Nicholas Lightfoot Isabella Ludbrook Luke Peters Rachel Sara David I. Watson Deborah Wright Ademola Adeyeye Luis Adrían Álvarez-Lozada Semra Demirli Atıcı Miloš Buhavac Giacomo Calini Muhammed Elhadi Orestis Ioannidis Mustafa Deniz Tepe Upanmanyu Nath Uzair Ahmad Wah Yang Faseeh Zaidi Surya Singh Bahiyah Abdullah Diana Sofía Garcés Palacios Ahmed Ragab Ahmed Ahmed Kyle Raubenheimer Davina Daudu Sarah Goh Simran Vinod Benyani Nandini Karthikeyan Laure Taher Mansour Warren Seow Zoya Tasi Aiden Jabur Upasana Pathak Melissa Park Dhia Errahmane Abdelmelek Ikram Fatima Zohra Boussahel Oumelaz Kaabache Naoual Lemdaoui Oualid Nebbar Mounira Rais Meriem Abdoun Aya Tinhinane Kouicem Souad Bouaoud Kamel Bouchenak Hind Saada Amel Ouyahia Wassila Messai Zhi Shyuan Choong Clarissa Ting M. Larkin Pei Jun Fong Isabel Soh Alyssia De Grandi Hareem Iftikhar

Balancing opioid stewardship and the need for adequate analgesia following discharge after surgery is challenging. This study aimed to compare outcomes patients discharged with versus opioid-free common surgical procedures.

10.1093/bjs/znad421 article EN cc-by British journal of surgery 2024-01-01

A solution based on a Kalman filter to trace the evolution of atmospheric boundary layer (ABL) sensed by ground-based elastic-backscatter tropospheric lidar is presented. An erf-like profile used model mixing-layer top and entrainment-zone thickness. The extended (EKF) enables retrieve track ABL parameters simplified statistics dynamics observation noise present in signal. This adaptive feature permits analyze scenes with low signal-to-noise ratios (SNRs) without need resort long-time...

10.1109/tgrs.2013.2284110 article EN IEEE Transactions on Geoscience and Remote Sensing 2013-10-24

Purpose: Telomerase promoter mutations are highly prevalent in human tumors including melanoma. A subset of patients with metastatic melanoma often fail multiple therapies, and there is an unmet urgent need to prolong disease control for those patients.Experimental Design: Numerous preclinical therapy-resistant models mouse were used test the efficacy a telomerase-directed nucleoside, 6-thio-2'-deoxyguanosine (6-thio-dG). Integrated transcriptomics proteomics approaches identify genes...

10.1158/1078-0432.ccr-17-2773 article EN Clinical Cancer Research 2018-03-21

Sirtuin 2 (Sirt2), an NAD+-dependent protein deacetylase, deacetylates tubulin, AKT, and other proteins. Previously, we showed that Sirt2 isoform 1 (Sirt2.1) increased replication of hepatitis B virus (HBV). Here, show HBV upregulates the expression primary alternatively spliced transcripts their respective isoforms, 1, 2, 5. Since 5 (Sirt2.5) is a catalytically inactive nuclear with spliced-out export signal (NES), speculated its different localization affects activity. The overexpression...

10.1128/jvi.00926-20 article EN Journal of Virology 2020-06-02

Land-use/land-cover change is an essential factor for understanding the ecological degradation of forests under threat from different climatic and human-mediated activities. This study investigates biodiversity significance Kaziranga Tiger Reserve, situated in Brahmaputra floodplain Assam, India, known its rich flora fauna. Despite importance biodiversity, reserve faces increasing threats habitat fragmentation, human-wildlife conflict, poaching, impacts climate change, necessitating a...

10.3389/fenvs.2025.1550450 article EN cc-by Frontiers in Environmental Science 2025-03-07

The article’s abstract is not available.

10.18502/ijph.v50i7.6640 article EN cc-by-nc Iranian Journal of Public Health 2021-07-05

A synergetic approach for the estimation of stable boundary layer height (SBLH) using lidar and microwave radiometer (MWR) data is presented. Vertical variance backscatter signal from a ceilometer used as an indicator aerosol stratification in nocturnal layer. This hypothesis supported by statistical analysis over one month observations. Thermodynamic information MWR-derived potential temperature incorporated coarse estimate SBLH. Data two instruments are adaptively assimilated extended...

10.1109/tgrs.2016.2586298 article EN IEEE Transactions on Geoscience and Remote Sensing 2016-09-15

Background: We determined the prevalence of antimicrobial resistance (AMR) in polymicrobial pathogens Pakistan. Methods: A total 70,518 clinical samples were collected aseptically and confirmation isolates antibiogram performed by VITEK 2 system. Results: Of samples, 441 (0.62%) with 882 (1.2%) 689 (78.1%) Gram-negative rods (GNRs), 166 (18.8%) Gram-positive cocci 27 (3.1%) Candida albicans. Among GNRs, 28.8% Escherichia coli 25.9% Klebsiella pneumoniae. Majority, 15.1% Pseudomonas...

10.2217/fmb-2023-0110 article EN Future Microbiology 2023-10-26

The Hepatitis B virus (HBV) HBx and HBc proteins play a crucial role in associating with covalently closed circular DNA (cccDNA), the primary factor contributing to intrahepatic viral persistence major obstacle achieving cure for HBV. cccDNA serves as reservoir persistence. Targeting proteins' interaction could potentially limit HBV replication. In this study, we present epitopes identified from global consensus sequences of that have potential serve targets development effective vaccine...

10.3390/microorganisms11122826 article EN cc-by Microorganisms 2023-11-21

Remote driving (RD) is a critical backup option for an autonomous vehicle when it faces unexpected situation on the road. Fifth generation (5G) mobile communication key enabler of RD providing link between remote operator and vehicle. There are stringent requirements in terms coverage, data rate latency application. In this paper, feasibility study at radio access network level coverage conditions that required application carried out. The considers over three carriers including 2.6 GHz, 5...

10.1109/iswcs.2019.8877213 article EN 2019-08-01

We recently reported that the PPIase Par14 and Par17 encoded by PIN4 upregulate HBV replication in an HBx-dependent manner binding to conserved arginine-proline (RP) motifs of HBx. core protein (HBc) has a 133RP134 motif; therefore, we investigated whether Par14/Par17 bind HBc and/or particles. Native agarose gel electrophoresis (NAGE) immunoblotting co-immunoprecipitation were used. Chromatin immunoprecipitation from HBV-infected HepG2-hNTCP-C9 cells was performed. NAGE revealed bound...

10.3389/fmicb.2021.795047 article EN cc-by Frontiers in Microbiology 2021-12-14

ABSTRACT Background: LRIG1 belongs to the family of transmembrane proteins containing leucine-rich repeats. LRIGs are considered as tumor suppressors they negatively regulate receptor tyrosine kinases. The role an EGFR regulator makes it important marker be studied in various epithelial-derived cancers. Methods: expression was determined Erbb2 + cell lines by western blotting, and motility examined migration assay. AKT/GSK3-β/β-catenin pathway presence using blotting. Results: So far, no...

10.4103/jcrt.jcrt_105_22 article EN Journal of Cancer Research and Therapeutics 2023-04-24

Thalassaemia is an inherited autosomal recessive disorder closely associated with consanguineous marriages. A literature search was conducted aim to investigate thalassemia and Articles were searched from Google Scholar Pubmed information regarding complications, epidemiology of association between marriages thalassemia, which subjected contemplation. Thalassemia carrier rate varies differently in different regions the world. In Indian subcontinent China, Central Asia, South Europe (also...

10.1016/s2222-1808(16)61142-8 article EN Asian Pacific Journal of Tropical Disease 2016-09-21

Abstract COVID-19 pandemic has urged the need of rapid detection SARS-CoV-2 in limited time frame. To cope with current, expanding scenario, accurate diagnosis should be ensured by both national and international health organizations. Sporadic marketing kits raises questions regarding quality control assurance. aim this study was to examine effectiveness nasopharyngeal swab based kits, comparison gold standard USFDA approved triple target real-time polymerase chain reaction. A...

10.21203/rs.3.rs-315851/v1 preprint EN cc-by Research Square (Research Square) 2021-03-23
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