Nathan Stephens

ORCID: 0000-0002-3178-8481
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About
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Research Areas
  • Nutrition and Health in Aging
  • Muscle Physiology and Disorders
  • GDF15 and Related Biomarkers
  • Gastric Cancer Management and Outcomes
  • Esophageal Cancer Research and Treatment
  • Body Composition Measurement Techniques
  • Geriatric Care and Nursing Homes
  • Mental Health and Patient Involvement
  • Muscle metabolism and nutrition
  • Esophageal and GI Pathology
  • Adipose Tissue and Metabolism
  • Colorectal Cancer Surgical Treatments
  • Lung Cancer Research Studies
  • Diet and metabolism studies
  • Neuroendocrine Tumor Research Advances
  • Fibromyalgia and Chronic Fatigue Syndrome Research
  • Cancer Diagnosis and Treatment
  • Advances in Oncology and Radiotherapy
  • Dementia and Cognitive Impairment Research
  • Colorectal Cancer Treatments and Studies
  • Frailty in Older Adults
  • Health Policy Implementation Science
  • Gastrointestinal Tumor Research and Treatment
  • Clinical Nutrition and Gastroenterology
  • Body Contouring and Surgery

Illinois State University
2022-2025

University of Worcester
2022-2024

Aintree University Hospitals NHS Foundation Trust
2021-2024

University of Liverpool
2019-2024

Royal Liverpool University Hospital
2019-2021

Royal Liverpool and Broadgreen University Hospital NHS Trust
2020

University of Edinburgh
2009-2018

Edinburgh Royal Infirmary
2003-2018

Glasgow Victoria Infirmary
2015

Wishaw General Hospital
2013

Cancer cachexia is a multi-organ tissue wasting syndrome that contributes to morbidity and mortality in many cancer patients. Skeletal muscle loss represents an established key feature yet there no molecular understanding of the disease process. In fact, postulated regulators originate largely from pre-clinical models it unclear how these translate clinical environment.Rectus abdominis biopsies were obtained 65 upper gastrointestinal (UGI) patients during open surgery RNA profiling was...

10.1186/gm122 article EN cc-by Genome Medicine 2010-01-15

Background Intramyocellular lipids are an important source of fuel for mitochondrial fat oxidation and play role in intramuscular lipid homeostasis. We hypothesised that due to the phenotype associated with cancer cachexia, there would exist association between increasing weight loss number/size intramyocellular droplets. Methods Nineteen patients 6 controls undergoing surgery were recruited. A rectus abdominis biopsy was performed processed transmission electron microscopy (TEM). The number...

10.1007/s13539-011-0030-x article EN cc-by-nc Journal of Cachexia Sarcopenia and Muscle 2011-05-30

Profound loss of adipose tissue is a hallmark cancer cachexia. Zinc-α2-glycoprotein (ZAG), recently identified adipokine, suggested as candidate in lipid catabolism. In the first study, eight weight-stable and 17 cachectic patients (weight ⩾5% previous 6 months) were recruited. mRNA protein expression assessed subcutaneous (SAT), morphology was examined serum ZAG concentrations quantified. second cohort, release by SAT determined 18 15 patients. The effect on lipolysis evaluated vitro....

10.1038/sj.bjc.6606083 article EN cc-by-nc-sa British Journal of Cancer 2011-01-18

The majority of cancer patients with advanced disease experience weight loss, including loss lean body mass. Severe is characteristic for cachexia, a condition that significantly impairs functional status and survival. underlying causes cachexia are incompletely understood, currently no therapeutic approach can completely reverse the condition. Autophagy coordinates lysosomal destruction cytosolic constituents systemically induced by starvation. We hypothesized starvation-mimicking signaling...

10.1038/s41598-017-02088-2 article EN cc-by Scientific Reports 2017-05-11

Abstract Purpose: The mechanisms underlying muscle wasting in patients with cancer remain poorly understood, and consequently there remains an unmet clinical need for new biomarkers treatment strategies. Experimental Design: Microarrays were used to examine the transcriptome single biopsies from healthy controls (n = 6) paired [pre-resection baseline (weight-loss 7%) 8 month post-resection follow-up (disease-free/weight-stable previous 2 months)] quadriceps of upper gastrointestinal (UGIC; n...

10.1158/1078-0432.ccr-11-2133 article EN Clinical Cancer Research 2012-03-28

Background Cachexia affects the majority of patients with advanced cancer and is associated a reduction in treatment tolerance, response to therapy, duration survival. One impediment towards effective cachexia validated classification system. Methods 41 resectable upper gastrointestinal (GI) or pancreatic underwent characterisation for based on weight-loss (WL) and/or low muscularity (LM). Four diagnostic criteria were used >5%WL, >10%WL, LM, LM+>2%WL. All biopsy rectus muscle. Analysis...

10.1371/journal.pone.0083618 article EN cc-by PLoS ONE 2014-01-03

Abstract Background In order to grow the potential therapeutic armamentarium in cachexia domain of supportive oncology, there is a pressing need develop suitable biomarkers and drug targets. This pilot study evaluated several candidate skeletal muscle biopsies from cohort upper gastrointestinal cancer (UGIC) patients. Methods One hundred seven patients (15 weight‐stable healthy controls (HC) 92 UGIC patients) were recruited. Mean (standard deviation) weight‐loss was 8.1 (9.3%). Cachexia...

10.1002/jcsm.12005 article EN cc-by Journal of Cachexia Sarcopenia and Muscle 2015-03-01

Abstract Purpose: Skeletal muscle wasting and weight loss are characteristic features of cancer cachexia contribute to impaired function, increased morbidity, poor tolerance chemotherapy. This study used a novel technique measure habitual myofibrillar protein synthesis in patients with compared healthy controls. Experimental design: An oral heavy water (87.5 g deuterium oxide) tracer was administered as single dose. Serum samples were taken over the subsequent week followed by quadriceps...

10.1158/1078-0432.ccr-14-2004 article EN Clinical Cancer Research 2014-11-05

Background Cachexia affects the majority with advanced cancer. Based on current demographic and clinical factors, it is not possible to predict who will develop cachexia or not. Such variation may, in part, be due genotype. It has recently been proposed extend diagnostic criteria for include a direct measure of low skeletal muscle index (LSMI) addition weight loss (WL). We aimed explore our panel candidate single nucleotide polymorphism (SNPs) association WL +/− computerized...

10.1002/jcsm.12138 article EN cc-by-nc-nd Journal of Cachexia Sarcopenia and Muscle 2016-08-05

RATIONALE Conventionally, myofibrillar protein synthesis is measured over time periods of hours. In clinical studies, interventions occur weeks. Functional measures such may be more representative. We aimed to develop a novel method determine fractional synthetic rate (FSR) estimate habitual rates, while avoiding intravenous tracer infusions. METHODS Four healthy males were given 100 g water enriched 70 Atom % with 2 H O as single oral bolus. Vastus‐lateralis needle biopsies performed and...

10.1002/rcm.6622 article EN Rapid Communications in Mass Spectrometry 2013-07-01

10.1080/15426432.2025.2475900 article EN cc-by-nc-nd Journal of Religion & Spirituality in Social Work Social Thought 2025-04-01

Abstract Background A positive circumferential resection margin (CRM) has been associated with a poorer prognosis in oesophageal and oesophagogastric junctional (OGJ) cancer. The College of American Pathologists defines the CRM as if tumour cells are present at margin, whereas Royal also include within 1 mm this margin. relevance these differences is not clear no study investigated impact adjuvant therapy. aim was to identify optimal definition an involved patients undergoing for or OGJ...

10.1002/bjs.9145 article EN British journal of surgery 2013-04-24

Cachexia is a multifactorial wasting syndrome associated with high morbidity and mortality in patients cancer. Diagnosis can be difficult and, the clinical situation, usually relies upon reported weight loss. The ‘omics’ technologies allow us opportunity to study end points of many biological processes. Among these, blood-based metabolomics promising method investigate pathophysiology human cancer cachexia identify candidate biomarkers. In this study, we performed liquid chromatography mass...

10.3390/cancers11101594 article EN Cancers 2019-10-19

We have investigated the use of human urine as a non-invasive medium to screen for molecular biomarkers carcinomas upper gastrointestinal (uGI) tract using SELDI-TOF-MS.A total 120 specimens from 60 control and uGI cancer patients were analysed establish potential biomarker fingerprint weak cation exchanger CM10 chip surface, which was validated by blind testing further 59 samples 33 26 patients.Using Biomarker Pattern software, we established model with sensitivity 98% specificity 95%...

10.1002/prca.201000107 article EN PROTEOMICS - CLINICAL APPLICATIONS 2011-03-04
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