Esophageal Diseases Clinical Trial
Official title:
Esophageal Squamous Cell Carcinoma African Prevention Research (ESCCAPE) Cytosponge™ Feasibility Study
A Tanzanian pilot study to test the feasibility of using the Cytosponge™ device - a less-invasive endoscopy alternative - for research on esophageal squamous cell carcinoma in African settings.
The Cytosponge™ consists of a spherical mesh enclosed in a gelatine capsule and attached to a string. The capsule is swallowed with the use of water and allowed to reach the stomach while remaining attached to the suture which is held onto by the patient or nurse (and which is affixed to a card preventing inadvertent swallowing of the suture). In the stomach the capsule is left for up to 5 minutes where it dissolves allowing the sponge to expand to its full size. It is then withdrawn using the suture, and as it does so collects cells from the lining of the oesophagus. After retrieval the Cytosponge™ containing the cytological specimen placed in preservative fluid. The typical cell yield of the procedure is 250,000. These cells are used to prepare a clot which is fixed with formalin and embedded in paraffin for sectioning and slide preparation. Slides are then examined under a microscope for pathological diagnosis and characterisation. This device was approved by the UK Medicines and Healthcare Products Regulatory Agency (MHRA) in 2008 and is a Class 1 device according to European Medical Devices 93/42/EEC as implemented in the United Kingdom by The Medical Devices Regulations 2002 (SI No 618). Healthy adult (>30 years) volunteers will be recruited during routine visits to the Majengo Healthcare Centre in Moshi, Tanzania where they will be informed of the study and invited to participate. Their participation will then involve the following: - Completing a short lifestyle questionnaire. - Swallowing the Cytosponge™ device to collect cells from their oesophagus. - Being contacted by telephone 7-days post procedure to assess acceptability. The following endpoints will be investigated: Core: - Response rate of participants invited to swallow device. - Proportion of participants able to swallow the device within three attempts and number of attempts taken (frequency distribution of 1, 2 and 3 attempts). - Post-swallow acceptability of device as per a previously employed satisfaction score (graded 0-10) - Proportion of collected sponges successfully processed into paraffin blocks. - Prevalence of ESD as determined by examination by a trained pathologist. - Prevalence of benign oesophageal pathologies (inflammation, candidiasis, eosinophilic oesophagitis). Extended (subject to future funding): - Prevalence of positivity for antibodies against chemical exposures and proliferation markers. - DNA yield from cells collected from the device. - DNA methylation profiles. - Genetic mutations in candidate cancer-relevant gene panel. ;
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