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Human neural stem cells could meet the clinical problem of critical limb ischemia
Date:11/25/2013

New research has shown human neural stem cells could improve blood flow in critical limb ischemia through the growth of new vessels. Critical limb ischemia (CLI) is a disease that severely obstructs arteries and reduces the blood flow to legs and feet. CLI remains an unmet clinical problem and with an ageing population and the rise in type II diabetes, the incidence of CLI is expected to increase.

The study, led by academics in the University of Bristol's School of Clinical Sciences, is published online in the American Heart Association journal Arteriosclerosis, Thrombosis, and Vascular Biology.

Current stem cell therapy trials for the treatment of CLI have revitalised new hope for improving symptoms and prolonging life expectancy. However, there are limitations on the use of autologous cell therapy. The patient's own stem cells are generally invasively harvested from bone marrow or require purification from peripheral blood after cytokine stimulation. Other sources contain so few stem cells that ex vivo expansion through lengthy bespoke Good Manufacturing Practice processes is required. Ultimately, these approaches lead to cells of variable quality and potency that are affected by the patient's age and disease status and lead to inconsistent therapeutic outcomes.

In order to circumvent the problem a team, led by Professor Paolo Madeddu in the Bristol Heart Institute at the University of Bristol, has used a conditionally immortalised clonal human neural stem cell (hNSC) line to treat animal models with limb ischaemia and superimposed diabetes. The CTX cell line, established by stem cell company ReNeuron, is genetically modified to produce genetically and phenotypically stable cell banks.

Results of the new study have shown that CTX treatment effectively improves the recovery from ischaemia through the promotion of the growth of new vessels. The safety of CTX cell treatment is currently being assessed in disab
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Contact: Joanne Fryer
joanne.fryer@bristol.ac.uk
44-011-733-17276
University of Bristol
Source:Eurekalert

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