Yiannis N. Kallis

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BACKGROUND AND METHODS In advanced liver damage, hepatic regeneration can occur through proliferation of a resident hepatic progenitor cell (HPC) population. HPCs are located within a designated niche in close association with myofibroblasts and bone marrow (BM) derived macrophages. Extra-cellular matrix (ECM) laminin invariably surrounds HPCs, but the(More)
BACKGROUND AND AIM We aimed to evaluate the diagnostic utility of single-operator peroral cholangioscopy (SOC) for indeterminate biliary lesions and its usefulness in electrohydraulic lithotripsy (EHL) of biliary stones not amenable to conventional endoscopic therapy. PATIENTS AND METHODS All patients undergoing SpyGlass SOC in four UK tertiary centres(More)
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BACKGROUND Tenofovir disoproxil fumarate (TDF) is an established nucleotide analogue in the treatment of chronic hepatitis B. Bone mineral density loss has been described in TDF-treated patients with human immunodeficiency virus infection, but limited data exist for patients with chronic hepatitis B. Dual X-ray absorptiometry (DEXA) was used to determine(More)
Pancreatic carcinoma is often inoperable, carries a poor prognosis, and is commonly complicated by malignant biliary obstruction. Phase I/II studies have demonstrated good safety and early stent patency using endoscopic biliary radiofrequency ablation (RFA) as an adjunct to self-expanding metal stent (SEMS) insertion for biliary decompression. To analyze(More)
Bone marrow (BM) cells may transdifferentiate into circulating fibrocytes and myofibroblasts in organ fibrosis. In this study, we investigated the contribution and functional roles of BM-derived cells in murine cerulein-induced pancreatic fibrosis. C57/BL6 female mice wild-type (WT) or Col 1α1(r/r) male BM transplant, received supraphysiological doses of(More)
Liver fibrosis results from the co-ordinated actions of myofibroblasts and macrophages, a proportion of which are of bone marrow origin. The functional effect of such bone marrow-derived cells on liver fibrosis is unclear. We examine whether changing bone marrow genotype can down-regulate the liver's fibrotic response to injury and investigate mechanisms(More)
Correspondence to: Professor S J Forbes, MRC/University of Edinburgh Centre for Inflammation Research, The Queen’s Medical Research Institute, 47 Little France Crescent, Edinburgh EH16 4TJ, UK; stuart.forbes@ ed.ac.uk __________________________ S tem cells are present in a variety of organs including the bone marrow (BM). Their role is to replenish multiple(More)