Last updated on February 2018

Changes in the Gut Microbiota of Patients Undergoing Allogeneic Stem Cell Transplantation (COLLECT)


Brief description of study

COLLECT is a monocentric, prospective, observational study, which aims to assess the association between changes in the intestinal microbiota and the incidence of gastrointestinal graft-versus-host diseases (GvHD). Patients admitted for performance of an allogeneic hematopoietic stem cell transplantation (HSCT) or patients with a first diagnosis of an acute myeloid leukemia (AML) will be enrolled and stool samples will be analyzed using next-generation sequencing. In addition to stool, blood and urine samples will be collected for cytokine and 3-indoxylsulfate analysis.

Exposure to drugs will not be influenced and remains at the discretion of the treating physician.

Detailed Study Description

Documentation of patient is performed by using the web-based survey platform www.ClinicalSurveys.net which was set up by researchers of the University Hospital of Cologne. This survey platform enables an optimal performance in epidemiological, observational, and interventional trials and is characterized by layered access security and frequent data backup. It has been used for numerous registry and cohort studies with approval of competent authorities and ethics boards.

The following data items of patients with a written informed consent are prospectively documented into our database:

  • Demographics
  • Chemotherapeutic agents
  • Other immunosuppressives
  • Radiation treatment
  • Antibiotic prophylaxis and treatment
  • Bowel movement abnormalities
  • HSCT Donor and recipient information
  • Status of hematological disease
  • Days with neutropenia
  • Fever and infectious complications

The following samples of patients with a written informed consent are prospectively collected, stored and analyzed:

  • Stool samples (16S rRNA analysis)
  • Urine (3-IS analysis)
  • Ethylenediaminetetraacetic acid (EDTA) blood samples (PBMCs Fluorescence-activated cell sorting (FACS) analysis)
  • Citrate blood samples (cytokine analysis)

Clinical Study Identifier: NCT03148197

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Recruitment Status: Open


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