Changes in Stem Cells of the Colon in Response to Increased Risk of Colorectal Cancer

Status

Completed

Phases

Unknown

Study type

Observational

Source

ClinicalTrials.gov

Registry ID

NCT01075893

Enrollment

Registered

2010-02-25

Start date

2010-02-28

Completion date

2012-10-31

Last updated

2017-10-31

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Colorectal Cancer

Keywords

Colorectal cancer, Stem cells, Ulcerative colitis, Polyps

Brief summary

Colorectal cancer is a common disease worldwide. Increasing evidence is demonstrating that colorectal cancers arise from 'cancer stem cells.' Stem cells in the colon reside at the bottom of thousands of microscopic crypts throughout the wall of the colon. They create all the cells lining the bowel wall. These cells are created in the base of the crypt and ascend to the top acquiring the characteristics of mature cells of the bowel wall as they ascend. It is now thought that colorectal cancer cells arise from stem cells where the genetic material regulating growth and division of the stem cell has become defective. This leads to unregulated production of cells which in turn have defective genetic information and cancer formation. Prior studies have demonstrated that the earliest changes before a cancer develops are changes in cellular proliferation. Now that reliable markers to identify stem cells have been found, the researchers aim to investigate stem cell numbers and changes in distribution in those at normal risk of colorectal cancer and those at higher risk. The researchers hypothesise that changes in cellular proliferation at the top of the crypt in individuals at higher risk of colorectal cancer are due to a change in the number of stem cells in the crypt base.

Interventions

None listed

Study design

Observational model

CASE_CONTROL

Time perspective

PROSPECTIVE

Eligibility

Sex/Gender

ALL

Age

18 Years to 85 Years

Healthy volunteers

Yes

Inclusion criteria

* Referred for endoscopy at participating centre

Exclusion criteria

* Age \<16 or \>85 * Familial polyposis syndrome * Lynch syndrome * Known colorectal tumour * Previous colorectal resection * Pregnancy * Chemotherapy in last 6 months * Therapy with aspirin/other nonsteroidal anti-inflammatory drug (NSAID) * Other immunosuppressive medication * Incomplete left sided examination * Colorectal carcinoma found at endoscopy * Iatrogenic perforation at endoscopy * Colorectal cancer on histology * Microscopic colitis on histology For the colitis group * Simple clinical colitis activity index (SCCAI) score \> 5

Design outcomes

Primary

Measure	Time frame
Number of stem cells in the colonic crypt	On day of endoscopy

Secondary

Measure	Time frame
Stem cell position in colonic crypt	On day of endoscopy

Countries

United Kingdom

Outcome results