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Herbal and Botanical

Psyllium

Calcium polycarbophil

The participants are allocated to intake the fifteen capsules per day, for example, five capsules three times per day. Altogether the fifteen capsules contains 5.5 g dietary fiber in psyllium husk.

The participants are allocated to intake the fifteen capsules per day, for example, five capsules three times per day. The capsules contain placebo (maltodextrin) and have a similar look as in the experimental arm.

The participants are invited to eat 15 capsules per day. The capsules either contain dietary fiber from psyllium husk or placebo.

Capsules containing either dietary fiber or placebo

Rebecca Ahlin, M.Sc.

Daniel Munkberg, Dietician

Johanna Svensson, MD

Gunnar N Steineck, MD, PhD

Maria Hedelin, PhD

Cecilia Bull, PhD

The investigators hypothesize that an increase in dietary fiber intake during radiation therapy may provide better long-term intestinal health for the cancer survivor. If the hypothesis is not correct, the increased intake may only mean an increase in acute side effects. All participants are advised to consume at least 16 g of dietary fiber/day via food. In addition, participants are invited to take capsules that together contain either 5.5 g of dietary fiber from psyllium husk or placebo.

The overall working hypothesis is that intake of dietary fiber during radiotherapy can mitigate or hinder end states or the triggering of long-lasting pathophysiological processes that decreases intestinal health in the cancer survivor. If correct, there is a dose-effect relationship to be documented. Moreover, if correct, different kinds of dietary fibers may have different effects. Mechanisms for the mitigatory effects may be that dietary fiber helps to preserve the two protective mucus layers and hinder gut-wall starvation. Lack of protection, as well as gut-wall starvation, may decrease the gut walls' integrity. That, in turn, may enhance bacterial migration from the lumen into the gut wall, causing unnecessary inflammation. This inflammation may, in turn, lead to a number of different pathophysiological processes, including a chronic self-propagating low-grade inflammation. Clinical experience suggests the intake of dietary fiber during radiotherapy may increase acute intestinal side effects. Our own data suggest a modest, if any, increase by dietary fiber.

Through recipes of tasty meals by price-winning chefs and general advice, the investigators guide the participant to try to consume at least 16 g of dietary fiber per day via food. The guidance takes place through telephone calls, calls via video link, and text on a website or paper material. The participant gets access to a mobile application that measures the daily intake of dietary fiber. Dietary fiber is ingested in 15 capsules with psyllium husk which contains a total of 5.5 g of dietary fiber. The investigators ask the participant to take the capsules two weeks before radiotherapy, during radiotherapy, and to stop four weeks after the end of radiotherapy. Placebo capsules (maltodextrin) are taken in the same way. To document the frequency of acute side effects, and what symptoms they cause, the participant is asked to report patient-reported outcomes once a week via a mobile application. They are also welcome to report side effects to the study office.

One month after the end of radiotherapy, the degree of inflammation is measured via markers in the blood and feces. One year after the end of radiotherapy, intestinal health is measured via patient-reported outcomes. Blood and feces are collected and patient-reported outcomes are reported in questionnaires and a mobile application before, during, and at least one year after the end of radiotherapy. This data will be a source of in-depth analysis. Radiotherapy gives rise to increased intensity of five different syndromes, fecal-leakage syndrome, urgency syndrome, uncontrolled flatulence, excess mucus discharge, and anal blood discharge. Damage of nerves and small vessels, weakening the anal-sphincter function by muscle fibers turning into the connective tissue (fibrosis), may explain some of the intensity of the fecal-leakage syndrome. An ongoing self-propagating low-grade inflammation, small-vessel and nerve damage in the gut wall may be related to urgency. Reasonably the microbiome, and the communication between the microbiome and the gut wall, is related to uncontrolled flatulence and excess mucus discharge. It is not known to what extent telangiectasias on a fibrotic inner gut wall explains anal blood discharge. Ad hoc studies in FIDURA will explore suggested mechanisms.

An interim analysis will be performed for the primary outcome to identify if there is any effect of the intervention, to decide whether to continue or terminate the inclusion of patients in the study. The concentration of c-reactive protein will be analyzed for all included patients who have donated blood to date (May 2023). To ensure that the blinding is not revealed, all analyses (biochemical and statistical) will be made by external personnel not included in the research group. The capsules are marked with X and Y, and the code for which is intervention or placebo will not be revealed even for the external personnel performing the interim analysis.

Random allocation of patients and blinding of researchers, patients, healthcare professionals and outcome assessors.

Capsules that look alike, with dietary fiber or placebo.

Dietary Fiber During Radiotherapy - a Placebo-controlled Randomized Trial

Dietary Fiber During Radiotherapy and Intestinal Inflammation - a Placebo-controlled Randomized Trial (FIDURA)

As soon as we we have started publishing data we will successively make our data available to other researchers.

Metrics obtained from freshly frozen defecated feces. The investigators plan to use next-generation sequencing.

Concentration of c-reactive protein in plasma or serum

Patient-reported outcomes through a validated questionnaire. The metric for the intensity of the urgency syndrome weighs the frequency of several symptoms by factor loadings, as described in PubMed ID 28158314. Examples of the previous usage can be seen in PubMed ID 28366105 and PubMed ID 30601820.

Deviation from the recommended intake of 15 capsules per day

Concentration of selected markers in blood and feces. The selection of cytokines and chemokines for this outcome is work in progress 26 august 2020 and will be be given as updated information later on. In feces we will primarily use elastase and calprotectin.

Patient-reported outcomes through a validated questionnaire. The metric for the intensity of the syndromes weighs the frequency of several symptoms by factor loadings, as described in PubMed ID 28158314. Examples of the previous usage can be seen in PubMed ID 28366105 and PubMed ID 30601820.

Distress from gastrointestinal symptoms as reported through a mobile phone application (ePROMS). Primarily we ask for defecation frequency, stool consistency (Bristol Scale), and frequency of abdominal pain. The participants may also report other side-effects, either by the mobile phone application, video link, or telephone with the study secretariat.

The Swedish Research Council

VGregion

Sjöbergstiftelsen

Sahlgrenska University Hospital, Sweden

Senior Professor

Neoplasm Metastasis

Liver Neoplasms

Neoplastic Processes

Liver Diseases

Hematinics

Liver Extracts

Cola

surgery followed by chemotherapy +/- targeted therapy regime according to each centre

Chemotherapy +/- targeted therapy alone, regime according to each centre.

Colectomy

Chemotherapy

Mehdi Karoui, MD, PhD

The present study is a multicentric randomized phase III trial designed to assess whether overall survival and quality of life are improved in patients with asymptomatic colon cancer and unresectable SLM treated with resection of the PT followed by chemotherapy versus chemotherapy alone.

At the time of diagnosis, 20-25% of patients with colorectal cancer (CRC) present synchronous liver metastases (SLM) and in the majority of patients (80-90%) liver metastases are unsuitable for curative surgical treatment. Whether either primary tumour (PT) resection followed by chemotherapy or immediate chemotherapy without PT resection is the best therapeutic option in patients with asymptomatic colon cancer and unresectable SLM is still controversial. No randomised trial has been conducted to answer this question.

Historically, surgeons have advocated resection of the PT to avoid potential complications of the intact PT (bleeding, obstruction, perforation). However, during the past decade, several highly active systemic agents have become available for treatment of patients with metastatic CRC. These agents have increased the median survival duration of patients with unresectable metastatic disease from 9 to 12 months with 5FU alone, to 30-35 months with the addition of modern cytotoxic and targeted agents. Modern agents have also demonstrated increased activity on the PT as well, and have been associated with low rates of PT-related complications during treatment in initially asymptomatic patients.

The impact of the strategy on survival has never been assessed properly. All published studies are of non-randomized design, single center, and retrospective in most of them. Moreover, few data on the use of systemic therapy are presented in these studies, which makes it difficult to assess the relative contribution of resection on outcome. In addition, patients with extensive disease or poor performance status were more likely to be offered chemotherapy rather than surgery thus introducing a bias at the ousted. Despite these limitations, PT resection at initial management of these metastatic CRC patients with unresectable SLM was related to prolonged survival on multivariate analysis in the majority of these series. The improvement in survival following PT resection may be attributed to the potential role of the PT to provide an angiogenic prosperous environment for metastatic tumour growth in the liver parenchyma adjacent to the SLM.

The present study is a multicenter randomized phase III trial designed to assess whether overall survival and quality of life are improved in patients with asymptomatic unresectable metastatic colon cancer treated with surgery followed by chemotherapy versus chemotherapy alone.

Patients (ECOG 0-1 performance status) with asymptomatic colon cancer (\>15cm from the anal margin) and unresectable liver only metastatic disease on initial abdominal CT/MRI scan will be randomized to either colectomy followed by chemotherapy, or chemotherapy without resection of the PT. Systemic chemotherapy with or without targeted therapy will be let to the investigators' discretion according to standard local practices. The primary endpoint of the study is overall survival for \>2 years. The secondary endpoints are: quality of life (EORTC QLQ-C30, QLQ-CR29), treatment safety (postoperative morbidity, complications related to the unresected PT, chemotherapy toxicity), progression-free survival and time to metastatic progression, radiological response to chemotherapy (RECIST v1.1 criteria), and the curative (R0) resection rate of metastases.

A 15% amelioration of overall survival at 2 years is expected in colectomy group (HR=0.65, with a rise from 40% to 55%). Using a two sided α level of 5%, 180 events are required to detect this difference with a power of 80% (β=0.20).

Taking into account the expected accrual of 15 patients per month during 19 months, a minimum follow-up of 28 months and a 5% rate of lost to follow-up, 278 patients will be included. The final analysis of all endpoints will be conducted 28 months after the last inclusion. The total duration of the study will be approximately 4 years.

A translational study will be conducted to evaluate the serum altered DNA patented test (AP-HP, 31 January 2008 under n°08/00543) we developed for colon cancer diagnosis, as a prognostic marker and a treatment response tool.

A radiological study will be conducted to identify the angiogenesis changes within or around liver metastases after resection of the PT. In addition to the morphological sequences allowing the use of RECIST1.1, DCE and DWI sequences will be performed in order to calculate the ADC value of the lesion as well as the Ktrans, Kep, PS that describe cellularity and perfusion of the lesions.

An optional ultrasound examination using SWE to study the stiffness of the liver metastases will be proposed at the end of the MRI examination.

Colectomy in Patients With Asymptomatic and Unresectable Stage IV Colon Cancer

Randomized Phase III Study Assessing the Interest of Primary Tumor Resection in Patients With Asymptomatic Colon Cancer and Unresectable Synchronous Liver Metastases.

Questionnaire QLQ-C30 et QLQ-CR29 in both treatment arms Time frame : one month after surgery in arm A, one month after the beginning of chemotherapy in arm B and then each 3 months in both treatment arms up to 2 years

Post-operative complications (surgical or medical) will be graded according to the Clavien-Dindo system

PFS is defined as the time interval between the date of randomization and the first date of progression of the metastatic disease or death in both treatment arms.

Time frame: each 3 months up to 2 years.

TTP is defined as the time interval between the date of randomization and the first date of progression of the metastatic disease or death in both treatment arms in both treatment arms Time frame: each 3 months up to 2 years.

The rate of secondary curative resection will be assessed in both treatment arms and will concern resection of both the PT and the metastatic disease Time frame: each 3 months up to 12 months

UNICANCER

Federation Francophone de Cancerologie Digestive

GERCOR - Multidisciplinary Oncology Cooperative Group

Assistance Publique - Hôpitaux de Paris

Patients assigned to the usual care arm may be referred for colorectal cancer screening by their providers per usual health center protocol and practice. They receive no additional outreach by the preventive care care manager.

Patients assigned to the intervention arm are mailed a letter informing them that they are due for colorectal cancer screening, educational information about colorectal cancer screening, a fecal occult blood testing (FOBT) kit, and directions on how to complete and return the FOBT kit

Patients assigned to the intervention arm are mailed a letter informing them that they are due for colorectal cancer screening, educational information about colorectal cancer screening, a fecal occult blood testing (FOBT) kit, and directions on how to complete and return the FOBT kit. Patients who do not respond to the mail outreach received up to 3 attempts at telephone outreach by the care manager.

Care manager outreach

Bechara N Choucair, MD

The purpose of this study is to determine if the direct mailing of fecal occult blood testing (FOBT) kits to patients who are due for colorectal cancer screening is an effective way to improve colorectal cancer screening rates within a low income and racially/ethnically diverse population.

Patients ages 50 to 80 who are identified through the electronic health record as not being up to date on colorectal cancer screening are eligible for the study and will be randomly assigned to the intervention or usual care group. Individuals in the intervention group will be mailed a letter informing them that they are due for colorectal cancer screening, educational material regarding colorectal cancer screening, a fecal occult blood testing (FOBT) kit, directions on how to use and return the FOBT kit. The proportion of patients assigned to the intervention versus usual care groups who complete a guideline recommended form of colorectal cancer screening within 4 months of the initiation of outreach will be compared.

Effectiveness of Direct-to-Patient Outreach on Colorectal Cancer Screening Within a Low Income and Diverse Population

A Randomized Controlled Trial of a Direct-to-Patient Outreach Program to Improve Rates of Colorectal Cancer Screening in a Low Income and Racially Diverse Population

Patients who have documentation within the electronic health record of completion of a guideline approved form of colorectal cancer screening (colonoscopy, sigmoidoscopy, or fecal occult blood testing (FOBT)) within 4 months of the initiation of the outreach intervention (by June 30, 2010)

Study title	NCT ID	Conditions	Interventions	Eligibility	Organization
Dietary Fiber During Radiotherapy - a Placebo-controlled Randomized Trial	NCT04534075	Malignant Neopl... Malignant Neopl... Malignant Neopl... Malignant Neopl... Malignant Neopl... Malignant Neopl... Malignant Neopl... Malignant Neopl... Malignant Neopl... Gynecologic Can...	Capsules contai...	18 Years - 80 Years	Sahlgrenska University Hospital, Sweden
Colectomy in Patients With Asymptomatic and Unresectable Stage IV Colon Cancer	NCT02363049	Malignant Neopl... Colon Cancer Li...	Colectomy Chemotherapy	18 Years - 75 Years	Assistance Publique - Hôpitaux de Paris
Effectiveness of Direct-to-Patient Outreach on Colorectal Cancer Screening Within a Low Income and Diverse Population	NCT01385579	Malignant Neopl...	Care manager ou...	50 Years - 80 Years	Northwestern University
Dietary Fiber During Radiotherapy - a Placebo-controlled Randomized Trial	NCT04534075	Malignant Neopl... Malignant Neopl... Malignant Neopl... Malignant Neopl... Malignant Neopl... Malignant Neopl... Malignant Neopl... Malignant Neopl... Malignant Neopl... Gynecologic Can...	Capsules contai...	18 Years - 80 Years	Sahlgrenska University Hospital, Sweden
Colectomy in Patients With Asymptomatic and Unresectable Stage IV Colon Cancer	NCT02363049	Malignant Neopl... Colon Cancer Li...	Colectomy Chemotherapy	18 Years - 75 Years	Assistance Publique - Hôpitaux de Paris

Spots Global Cancer Trial Database for malignant neoplasm of large intestine