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Recruiting issues
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This study will measure the activity of natural killer (NK) cells using the in vitro diagnostic device NK Vue in high risk subjects (Quebec risk categories P2, P3 and P4) scheduled for colonoscopy.
In Quebec, subjects in risk category P2 are scheduled for colonoscopy due to high suspicion of cancer based on imaging, sigmoidoscopy or clinical exam. Subjects in categories P3 and P4 are scheduled for colonoscopy for one of the following reasons: suspicion of having an inflammatory bowel condition, rectal bleeding, presence of occult blood in stool, unexplained iron deficiency anemia, recent change in bowel habits, family history of CRC or adenomatous polyps or other hereditary colorectal diseases. Often, colonoscopy is not performed within the government-prescribed recommended delays, leading to waiting lists for the procedure. Analysis of NK cell activity may help identify those at risk for the presence of CRC and therefore help prioritize subjects on these waiting lists, help manage resources and help convince subjects to have a colonoscopy. Furthermore, all subjects will undergo a FIT, allowing a determination of the ability of each test alone, as well as a combination of NK Vue and FIT, to predict outcome on colonoscopy.
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| IVDD for NK cell activity in whole blood | Diagnostic Test | Once subject has been scheduled for a colonoscopy by the institution (up to 4 weeks prior to procedure), the subject will perform a FIT at home and an NK Vue test (one sample of one mL of blood) at the institution, prior to the day of colonoscopy. |
|
| Measure | Description | Time Frame |
|---|---|---|
| Test performance of NK Vue (ability of NK Vue to detect CRC in those subjects in risk categories P2, P3 or P4) | Test performance of NK Vue for CRC will be assessed by ROC analysis and logistic regression, adjusting for subject baseline characteristics | NK Vue blood draw taken within 7 days of FIT stool sampling and prior to colonoscopy |
| Measure | Description | Time Frame |
|---|---|---|
| Test performance of FIT, to be determined at different cut-offs reflective of the various Canadian provincial cut-offs. | Test performance of FIT for CRC, using different cut-offs (≥50 ng/mL, ≥ 75 ng/mL, ≥ 100 ng/mL and ≥ 175 ng/mL), will be assessed by calculating the RR and by using ROC analyses at the different cut-offs. | FIT performed at home and sample brought to institution within 7 days of collection and prior to coloscopy |
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Inclusion Criteria:
Exclusion Criteria:
Lack of understanding and/or participation due to illiteracy or inability to comprehend English or French
Subjects in category P3 who are there due to knowledge or suspicion of an inflammatory bowel disease
Previous history of cancer (any type) or active infection (as declared by the subject at the time of enrolment)
Currently participating (or participated within the previous 120 days) in an investigational therapeutic study (in case of interference of the drug with the immune system)
Subjects who underwent their colonoscopy and
Female who is pregnant, nursing, or of child-bearing potential while not practicing effective contraceptive methods.
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| Name | Affiliation | Role |
|---|---|---|
| Gilles Jobin, MD, FRCP | CIUSSS de l'Est-de-l'île-de-Montréal; Installation Hôpital Maisonneuve-Rosemont | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| CIUSSS de l'Est-de-l'île-de-Montréal, Installation Hôpital Maisonneuve-Rosemont | Montreal | Quebec | H1T 2M4 | Canada | ||
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 28625834 | Background | Jobin G, Rodriguez-Suarez R, Betito K. Association Between Natural Killer Cell Activity and Colorectal Cancer in High-Risk Subjects Undergoing Colonoscopy. Gastroenterology. 2017 Oct;153(4):980-987. doi: 10.1053/j.gastro.2017.06.009. Epub 2017 Jun 15. |
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| ID | Term |
|---|---|
| D015179 | Colorectal Neoplasms |
| ID | Term |
|---|---|
| D007414 | Intestinal Neoplasms |
| D005770 | Gastrointestinal Neoplasms |
| D004067 | Digestive System Neoplasms |
| D009371 | Neoplasms by Site |
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All subjects will have a FIT (OC FIT-CHEK, Polymedco) and NK Vue test prior to colonoscopy
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Endoscopist will not be provided the results of either the FIT or NK Vue tests performed as part of the trial; biochemist will not be provided the results of the colonoscopy
| Test performance of NK Vue in combination with FIT | Test performance of the combination of FIT at the different cut-offs (≥50 ng/mL, ≥ 75 ng/mL, ≥ 100 ng/mL and ≥ 175 ng/mL) and NK Vue (cut-off of <200 pg/mL), for CRC, will be assessed by calculating the RR and by using ROC analyses. Similar analyses will be done with subjects having either a positive FIT (at different cut-offs) or a NK Vue of <200 pg/mL | FIT and NK Vue performed up to 4 weeks prior to colonoscopy, with NK Vue draw within 7 days of stool sampling |
| Centre Hospitalier de l'Université de Montréal |
| Montreal |
| Quebec |
| H2X 3J4 |
| Canada |
| McGill University and the McGill University Health Centre | Montreal | Quebec | H3G 1A4 | Canada |
| D009369 | Neoplasms |
| D004066 | Digestive System Diseases |
| D005767 | Gastrointestinal Diseases |
| D003108 | Colonic Diseases |
| D007410 | Intestinal Diseases |
| D012002 | Rectal Diseases |