Helen Spencer

ORCID: 0000-0003-2474-3290
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About
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Research Areas
  • Transplantation: Methods and Outcomes
  • Organ Transplantation Techniques and Outcomes
  • Mesenchymal stem cell research
  • Mycobacterium research and diagnosis
  • Respiratory viral infections research
  • Renal Transplantation Outcomes and Treatments
  • Interstitial Lung Diseases and Idiopathic Pulmonary Fibrosis
  • Tracheal and airway disorders
  • Tissue Engineering and Regenerative Medicine
  • Neonatal Respiratory Health Research
  • Pluripotent Stem Cells Research
  • Cancer-related molecular mechanisms research
  • Cystic Fibrosis Research Advances
  • Polyomavirus and related diseases
  • Tuberculosis Research and Epidemiology
  • Congenital Heart Disease Studies
  • Congenital heart defects research
  • Respiratory Support and Mechanisms
  • Bacteriophages and microbial interactions
  • Pulmonary Hypertension Research and Treatments
  • Actinomycetales infections and treatment
  • Corneal Surgery and Treatments
  • Electrospun Nanofibers in Biomedical Applications
  • Mechanical Circulatory Support Devices
  • CRISPR and Genetic Engineering

Great Ormond Street Hospital for Children NHS Foundation Trust
2013-2024

Great Ormond Street Hospital
2004-2023

University College London
2004-2023

The Queen's Medical Research Institute
2020

University of Edinburgh
2017-2020

University of Bristol
2010-2019

National Health Service
2019

NIHR Bristol Cardiovascular Biomedical Research Unit
2010-2019

University of Udine
2015

Evolutionary Genomics (United States)
2015

Abstract Background Nontuberculous Mycobacterium infections, particularly abscessus, are increasingly common among patients with cystic fibrosis and chronic bronchiectatic lung diseases. Treatment is challenging due to intrinsic antibiotic resistance. Bacteriophage therapy represents a potentially novel approach. Relatively few active lytic phages available there great variation in phage susceptibilities M. abscessus isolates, requiring personalized identification. Methods isolates from 200...

10.1093/cid/ciac453 article EN cc-by Clinical Infectious Diseases 2022-06-09

Abstract Epithelial-mesenchymal transition (EMT) occurs during embryonic development and may also be associated with the metastatic spread of epithelial tumors. During EMT, E-cadherin is down-regulated this correlates increased motility invasion cells. We show that differentiation human stem (ES) cells in monolayer culture an E- to N-cadherin switch, vimentin expression, up-regulation repressor molecules (Snail Slug proteins), gelatinase (matrix metalloproteinases; MMP-2 MMP-9) activity...

10.1158/0008-5472.can-07-2253 article EN Cancer Research 2007-12-01

To develop an embryoid body-free directed differentiation protocol for the rapid generation of functional vascular endothelial cells derived from human embryonic stem (hESCs) and to assess system microRNA regulation angiogenesis.The production defined cell lineages hESCs is a critical requirement evaluating their potential in regenerative medicine. We developed feeder- serum-free protocol. Directed revealed loss pluripotency markers progressive induction mRNA protein expression (including...

10.1161/atvbaha.110.204800 article EN Arteriosclerosis Thrombosis and Vascular Biology 2010-04-30

Rationale: Optimization of cell therapy for cardiac repair may require the association different populations with complementary activities. Objective: Compare reparative potential saphenous vein–derived pericytes (SVPs) that stem cells (CSCs) in a model myocardial infarction, and investigate whether combined transplantation provides further improvements. Methods Results: SVPs CSCs were isolated from vein leftovers coronary artery bypass graft surgery discarded atrial specimens transplanted...

10.1161/circresaha.115.306146 article EN Circulation Research 2015-03-24

Epithelial-mesenchymal transition (EMT) events occur during embryonic development and are important for the metastatic spread of epithelial tumors. We show here that spontaneous differentiation mouse stem (ES) cells is associated with an E- to N-cadherin switch, up-regulation E-cadherin repressor molecules (Snail Slug proteins), gelatinase activity (matrix metalloproteinase [MMP]-2 -9), increased cellular motility, all characteristic EMT events. The 5T4 oncofetal antigen, previously shown be...

10.1091/mbc.e06-09-0875 article EN Molecular Biology of the Cell 2007-05-17

Section:ChooseTop of pageAbstract <<Lung Transplantation for ...Pediatric Lung Transplant...Operative and Perioperati...(Non)-Adherence in Cystic...The Importance Measuri...Three Sociohistorical Cha...Alternate Models Selec...Some Comments on Study De...Lung ...ReferencesCITING ARTICLES

10.1513/pats.2009008-088tl article EN Proceedings of the American Thoracic Society 2009-12-15

Brittle cornea syndrome (BCS; MIM 229200) is an autosomal recessive generalized connective tissue disorder caused by mutations in ZNF469 and PRDM5. It characterized extreme thinning fragility of the that may rupture absence significant trauma leading to blindness. Keratoconus or keratoglobus, high myopia, blue sclerae, hyperelasticity skin without excessive fragility, hypermobility small joints are additional features BCS. Transcriptional regulation extracellular matrix components,...

10.1016/j.ymgme.2013.04.014 article EN cc-by Molecular Genetics and Metabolism 2013-04-26

Background Living grafts produced by combining autologous heart‐resident stem/progenitor cells and tissue engineering could provide a new therapeutic option for definitive correction of congenital heart disease. The aim the study was to investigate antigenic profile, expansion/differentiation capacity, paracrine activity, pro‐angiogenic potential cardiac pericytes assess their engrafting capacity in clinically certified prosthetic grafts. Methods Results CD 34 pos cells, negative endothelial...

10.1161/jaha.115.002043 article EN cc-by-nc-nd Journal of the American Heart Association 2015-06-15

Abstract Aims Long non-coding RNAs (lncRNAs) play functional roles in physiology and disease, yet understanding of their contribution to endothelial cell (EC) function is incomplete. We identified lncRNAs regulated during EC differentiation investigated the role LINC00961 its encoded micropeptide, small regulatory polypeptide amino acid response (SPAAR), function. Methods results Deep sequencing human embryonic stem ECs was combined with Encyclopedia DNA Elements (ENCODE) RNA-seq data from...

10.1093/cvr/cvaa008 article EN cc-by Cardiovascular Research 2020-01-20

Background Transplantation of adventitial pericytes ( APC s) promotes cardiac repair in murine models myocardial infarction. The aim present study was to confirm the benefit therapy a large animal model. Methods and Results We performed blind, randomized, placebo‐controlled trial swine model reperfused A first used human s hAPC from patients undergoing coronary artery bypass graft surgery. second allogeneic sAPC s). Primary end points were (1) ejection fraction as assessed by magnetic...

10.1161/jaha.117.006727 article EN cc-by-nc-nd Journal of the American Heart Association 2018-01-23

Abstract Background Children with cystic fibrosis (CF) can develop life-threatening infections of Mycobacterium abscessus. These present a significant clinical challenge, particularly when the strains involved are resistant to antibiotics. Recent evidence within-patient subclones M. abscessus in adults CF suggests possibility that diversity may be relevant for treatment pediatric patients. Methods We performed whole-genome sequencing (WGS) on 32 isolates were taken from multiple body sites 2...

10.1093/cid/ciz069 article EN cc-by Clinical Infectious Diseases 2019-01-21

<b>Background:</b> Recent reports have shown evidence of host derived parenchymal engraftment in several human allografts including the lung, leading to speculation that stem cell therapy may be useful for lung repair diseases such as cystic fibrosis (CF). To date, previous studies looked at single surgical or autopsy specimens and no longitudinal been reported. The aim this study was assess whether transbronchial biopsies could used time course chimerism following transplantation....

10.1136/thx.2004.029678 article EN Thorax 2004-12-24

Objective— We investigated the association between functional, epigenetic, and expressional profile of human adventitial progenitor cells (APCs) therapeutic activity in a model limb ischemia. Approach Results— Antigenic functional features were analyzed throughout passaging 15 saphenous vein (SV)–derived APC lines, which 10 from SV leftovers coronary artery bypass graft surgery 5 varicose removal. Moreover, SV-APC lines transplanted (8×10 cells, IM) mice with Blood flow capillary arteriole...

10.1161/atvbaha.114.304989 article EN Arteriosclerosis Thrombosis and Vascular Biology 2015-01-09

Cell therapy represents a promising option for revascularization of ischemic tissues.However, injection dispersed cells is not optimal to ensure precise homing into the recipient's vasculature.Implantation cell-engineered scaffolds around occluded artery may obviate these limitations.Here, we employed synthetic polymer polycaprolactone (PCL) fabrication 3D woodpile-or channel-shaped by computer-assisted writing system (Pressure Assisted Micro-syringe Square (PAM 2 )), followed deposition...

10.1088/1758-5090/8/1/015020 article EN Biofabrication 2016-03-24

The E-protein transcription factors play essential roles in lymphopoiesis, with E12 and E47 (hereafter called E2A) being particularly important B cell specification maturation. E2A gene is also involved a chromosomal translocation that results the leukemogenic oncoprotein E2A-PBX1. two activation domains of E2A, AD1 AD2, display redundant, independent, cooperative functions cell-dependent manner. by binding transcriptional co-activator CBP/p300; this interaction required oncogenesis occurs...

10.1093/nar/gku206 article EN cc-by-nc Nucleic Acids Research 2014-03-20

Abstract Background Mycobacterium abscessus infection has been associated with variable outcomes following lung transplantation. M comprises three subspecies ( subsp , massiliense and bolletii ). We investigated whether transplantation outcome in cystic fibrosis (CF) patients a single center was related to the genetic cluster. Methods CF chronic transplanted at Great Ormond Street Hospital between 2004 2017 were retrospectively examined. All isolates identified level by polymerase chain...

10.1111/tid.13274 article EN Transplant Infectious Disease 2020-03-04
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