A Phase 1 interventional study of Dolcanatide and Laboratory Biomarker Analysis in Colorectal Carcinoma, sponsored by National Cancer Institute (NCI). Completed at 1 site in United States. Open to participants aged 18 Years to 65 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2021-06-14.
Sponsored by National Cancer Institute (NCI) · Phase 1, Interventional, and Prevention
This phase I trial studies how well dolcanatide works in preventing colorectal cancer in healthy participants. Dolcanatide is similar to a natural hormone released into the intestine. It is thought that people who have low levels of the hormone are more likely to get colon cancer. It may be possible to prevent colon cancer by giving a drug that is similar to the hormone, such as dolcanatide.
PRIMARY OBJECTIVES:
I. To identify the ability of dolcanatide (SP333), when administered as a single daily dose of 27 mg x 7 days, to induce a direct pharmacological effect on cGMP levels, based on biopsy samples from the rectum obtained pre- and post-intervention, as compared to placebo.
SECONDARY OBJECTIVES:
I. To assess the pharmacodynamic (PD) response rate between arms (dolcanatide versus placebo).
II. To confirm the safety and tolerability of dolcanatide, as compared to placebo.
OUTLINE: Participants are randomized to 1 of 2 arms.
ARM A: Participants receive dolcanatide orally (PO) once daily (QD) for 7 days.
ARM B: Participants receive placebo PO QD for 7 days.
After completion of study, participants are followed up at 21 and 51 days.
5,734 studies on the registry are indexed under Colorectal Neoplasms; 1,481 are open to participants now.
This study's enrollment of 27 is below the median of 77 across 4,222 interventional studies indexed under Colorectal Neoplasms.
Browse Colorectal Neoplasms studies →National Cancer Institute (NCI) is the lead sponsor of 3,554 studies on the registry; 334 are open to participants now.
Of its 407 completed or terminated interventional studies of FDA-regulated products, 370 (91%) have results posted.
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Exclusion Criteria:
Participants receive dolcanatide PO QD for 7 days.
Drug: Dolcanatide · Other: Laboratory Biomarker Analysis · Other: Questionnaire Administration
Participants receive placebo PO QD for 7 days.
Other: Laboratory Biomarker Analysis · Other: Placebo Administration · Other: Questionnaire Administration
Given PO
Also known as: SP 333, SP-333, SP333
Correlative studies
Given PO
Ancillary studies
Pharmacological Effect on Cyclic Guanosine Monophosphate (cGMP) Levels for Dolcanatide Arm Versus (vs.) Placebo, as Measured by the Differences in Mean cGMP Levels After 7 Days of Intervention
Pharmacological effect on cyclic guanosine monophosphate (cGMP) levels for dolcanatide arm versus (vs.) placebo, where this effect is defined as the arithmetic difference in mean cGMP levels before and after 7 days of dolcanatide from subject biopsies. This represents the increase in cGMP stimulated by 7 days of dolcanatide in an individual subject. The mean cGMP value will be calculated based on 6 biopsies collected from the rectum during a flexible sigmoidoscopy procedure. Each biopsy was analyzed in triplicate using a commercially available EIA kit.
Time frame: Baseline to 7 days
Pharmacodynamic (PD) Response Rate
Each participant will be assessed for PD response. The calculation is based on the standardized difference in means for the pharmacological effect on cGMP levels at the participant level, where a subject with a z \>= 1.645 will be considered a PD responder. A participant with a z \< 1.645 will be considered a non-responder. The PD response rate (percentage) of patients are summarized below by arm.
Time frame: Baseline to 7 days
Percentage of Participants With Grade 3 or Higher Diarrhea Per National Cancer Institute Common Terminology Criteria for Adverse Events Version 4.0
The overall adverse event rates (percentages) for grade 3 or higher adverse events regardless of attribution to treatment are reported below. The percentages below are summarized for Diarrhea.
Time frame: Up to 21 days
| Milestone | Arm A (Placebo) | Arm B (Dolcanatide) |
|---|---|---|
| Started | 13 | 14 |
| Completed | 11 | 13 |
| Not completed | 2 | 1 |
| Withdrew: Adverse event | 0 | 1 |
| Withdrew: Withdrawal by subject | 1 | 0 |
| Withdrew: Inadequate bowel prep | 1 | 0 |
Pharmacological effect on cyclic guanosine monophosphate (cGMP) levels for dolcanatide arm versus (vs.) placebo, where this effect is defined as the arithmetic difference in mean cGMP levels before and after 7 days of dolcanatide from subject biopsies. This represents the increase in cGMP stimulated by 7 days of dolcanatide in an individual subject. The mean cGMP value will be calculated based on 6 biopsies collected from the rectum during a flexible sigmoidoscopy procedure. Each biopsy was analyzed in triplicate using a commercially available EIA kit.
| pmol/mg | Arm B (Dolcanatide) | Arm A (Placebo) |
|---|---|---|
| Pharmacological Effect on Cyclic Guanosine Monophosphate (cGMP) Levels for Dolcanatide Arm Versus (vs.) Placebo, as Measured by the Differences in Mean cGMP Levels After 7 Days of Intervention | -0.42 ± 0.43 | -0.22 ± 0.29 |
Each participant will be assessed for PD response. The calculation is based on the standardized difference in means for the pharmacological effect on cGMP levels at the participant level, where a subject with a z \>= 1.645 will be considered a PD responder. A participant with a z \< 1.645 will be considered a non-responder. The PD response rate (percentage) of patients are summarized below by arm.
| percentage of patients | Arm B (Dolcanatide) | Arm A (Placebo) |
|---|---|---|
| Pharmacodynamic (PD) Response Rate | 0 | 0 |
The overall adverse event rates (percentages) for grade 3 or higher adverse events regardless of attribution to treatment are reported below. The percentages below are summarized for Diarrhea.
| percentage of patients | Arm B (Dolcanatide) | Arm A (Placebo) |
|---|---|---|
| Percentage of Participants With Grade 3 or Higher Diarrhea Per National Cancer Institute Common Terminology Criteria for Adverse Events Version 4.0 | 7.1 | 0 |
Collected over Up to 21 days. Non-serious events are listed at a 0% frequency threshold.
| Group | Deaths | Serious | Other |
|---|---|---|---|
| Arm A (Placebo) | 0/13 (0%) | 0/13 (0%) | 4/13 (30.8%) |
| Arm B (Dolcanatide) | 0/14 (0%) | 0/14 (0%) | 11/14 (78.6%) |
| Event | Arm A (Placebo) | Arm B (Dolcanatide) |
|---|---|---|
| DiarrheaGastrointestinal disorders | 0/13 | 11/14 |
| VomitingGastrointestinal disorders | 0/13 | 2/14 |
| BloatingGastrointestinal disorders | 1/13 | 0/14 |
| ConstipationGastrointestinal disorders | 1/13 | 1/14 |
| FlatulenceGastrointestinal disorders | 1/13 | 1/14 |
| Back painMusculoskeletal and connective tissue disorders | 1/13 | 0/14 |
| AnxietyPsychiatric disorders | 1/13 | 0/14 |
| CoughRespiratory, thoracic and mediastinal disorders | 1/13 | 1/14 |
| Dry mouthGastrointestinal disorders | 0/13 | 1/14 |
| DyspepsiaGastrointestinal disorders | 0/13 | 1/14 |
| Age, Continuous(years) | Arm A (Placebo) | Arm B (Dolcanatide) | Total |
|---|---|---|---|
| Mean | 44.2 ± 11.67 | 48.7 ± 5.72 | 46.6 ± 9.19 |
| Sex: Female, Male(Participants) | Arm A (Placebo) | Arm B (Dolcanatide) | Total |
|---|---|---|---|
| Female | 4 | 0 | 4 |
| Male | 9 | 14 | 23 |
| Race (NIH/OMB)(Participants) | Arm A (Placebo) | Arm B (Dolcanatide) | Total |
|---|---|---|---|
| American Indian or Alaska Native | 0 | 0 | 0 |
| Asian | 0 | 0 | 0 |
| Native Hawaiian or Other Pacific Islander | 0 | 0 | 0 |
| Black or African American | 10 | 8 | 18 |
| White | 3 | 6 | 9 |
| More than one race | 0 | 0 | 0 |
| Unknown or Not Reported | 0 | 0 | 0 |
| ECOG Performance Status = 0(Participants) | Arm A (Placebo) | Arm B (Dolcanatide) | Total |
|---|---|---|---|
| Count of participants | 13 | 14 | 27 |
Documents are hosted by the registry — open the source record to download them.
Ran from Jul 2018 to primary completion in Jan 2019, 5 months.
Results were first posted in Dec 2019, 11 months after primary completion.
Of 141 non-industry phase 1 interventional studies under Colorectal Neoplasms, half reached primary completion within 49 months of starting (the median), counting those still running; a quarter within 31 and three quarters within 77. This study's 5 months is below that.
Counting every sponsor, half of 342 studies reached it within 49 months; a quarter within 32 and three quarters within 77.
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This study is completed, as verified in May 2021. You cannot join it, but the record below documents what was studied.
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Studies of the drug tested here: Dolcanatide
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