Characteristics and Clinical Significance of Gut Microbiota in Patients With Monoclonal Gammopathy

Zhujiang Hospital

Status: Enrolling

Conditions: M-Protein; Multiple Myeloma; Monoclonal Gammopathy of Undetermined Significance (MGUS); Intestinal Flora

Study type: Observational

Funder types: Other

Identifiers

NCT06690593

ZhujiangGMMGUS

Details and patient eligibility

About

This is an observational case-control study, aiming to systematically analyze the gut microbiome characteristics of patients with monoclonal gammopathy of undetermined significance (MGUS). The study will collect blood and stool samples from MGUS patients, non-MGUS patients (with similar diseases), and healthy controls, and perform multi-omics detection including microbiomics, peptidomics, and biochemical immunology. It will comprehensively analyze the abnormal features of the gut microbiome in MGUS patients, which may help provide new biomarkers and potential mechanisms for the diagnosis, prognosis evaluation, and treatment strategies of MGUS.

Full description

This is a case-control, observational single-center study aiming to investigate the impact of common comorbidities on gut microbiome structure and disease progression in patients with monoclonal gammopathy. We plan to collect samples from 11 disease categories, with each category including two groups (monoclonal gammopathy and non-monoclonal gammopathy), as well as 700 age- and gender-matched healthy controls, for a total of 2,990 samples. At enrollment, we will collect whole blood, plasma, serum, and fecal samples from the study participants, and obtain relevant information such as demographic characteristics, lifestyle, family medical history, and medication use.We will perform metagenomic, proteomic, and serum biochemical and immunological analyses on the samples to directly obtain association data between gut microbiome characteristics (as exposure factors) and clinical outcomes (as endpoints). This study will systematically analyze the dysbiosis characteristics of the gut microbiome in monoclonal gammopathy patients, identify key microbial biomarkers, and compare the microbiome structure and clinical laboratory indices between MGUS patients and different comorbidity subgroups, to explore their impact on the disease diagnostic model.

Enrollment: 2,990 estimated patients

Sex: All

Ages: 45+ years old

Volunteers: Accepts Healthy Volunteers

Inclusion and exclusion criteria

(I) Inclusion Criteria:

1. Age 45 years or older;
2. Negative screening for monoclonal protein by MALDI-TOF MS;
3. No significant diseases found upon medical examination, and confirmed not to have any diseases related to this study;
4. Sufficient whole blood, plasma, serum, and stool samples available, and relevant case data can be provided.

(II) Exclusion Criteria:

1. History of intestinal tumors, irritable bowel syndrome, or inflammatory bowel disease, or diagnosed during hospitalization;
2. Antibiotic treatment received in the past month; Presence of severe systemic diseases, including malignant tumors;
3. Insufficient sample volume, or presence of severe hemolysis, lipemia, jaundice, or other unqualified sample conditions.

Trial design

2,990 participants in 3 patient groups

Monoclonal gammopathy patients

Description:

(I) Inclusion Criteria: 1. Age 45 years or older. 2. Positive screening for monoclonal protein by MALDI-TOF MS. 3. Meeting the International Classification of Diseases, 11th Revision (ICD-11) criteria for one of the following disease types:Infectious diseases，Tumors，Blood or hematopoietic organ diseases，Immune system diseases，Endocrine, nutritional, or metabolic diseases，Nervous system diseases，Circulatory system diseases，Respiratory system diseases，Digestive system diseases，Musculoskeletal or connective tissue diseases，Urinary and reproductive system diseases. 4. Sufficient whole blood, plasma, serum, and stool samples available, with relevant case data provided. (II) Exclusion Criteria: 1. History of intestinal tumors, irritable bowel syndrome, or inflammatory bowel disease, or diagnosed during hospitalization. 2. Antibiotic treatment in the past month. 3. Insufficient sample volume, or severe hemolysis, lipemia, jaundice, or other unqualified sample conditions.

Non-monoclonal gammopathy patients

Description:

(I) Inclusion Criteria: 1. Age 45 years or older. 2. Negative screening for monoclonal protein by MALDI-TOF MS. 3. Patients meeting ICD-11 criteria for one of the following disease types:Infectious diseases，Tumors，Blood or hematopoietic organ diseases，Immune system diseases，Endocrine, nutritional, or metabolic diseases，Nervous system diseases，Circulatory system diseases，Respiratory system diseases，Digestive system diseases，Musculoskeletal or connective tissue diseases，Urinary and reproductive system diseases. 4. Sufficient whole blood, plasma, serum, and stool samples available, with relevant case data provided. (II) Exclusion Criteria: 1. History of intestinal tumors, irritable bowel syndrome, or inflammatory bowel disease, or diagnosed during hospitalization. 2. Antibiotic treatment in the past month. 3. Insufficient sample volume, or severe hemolysis, lipemia, jaundice, or other unqualified sample conditions.

Healthy control group

Description:

(I) Inclusion Criteria: 1. Age 45 years or older. 2. Negative screening for monoclonal protein by MALDI-TOF MS. 3. No significant diseases found upon medical examination, and confirmed not to have any diseases related to this study. 4. Sufficient whole blood, plasma, serum, and stool samples available, and relevant case data can be provided. (II) Exclusion Criteria: 1. History of intestinal tumors, irritable bowel syndrome, or inflammatory bowel disease, or diagnosed during hospitalization. 2. Antibiotic treatment received in the past month. Presence of severe systemic diseases, including malignant tumors. 3. Insufficient sample volume, or presence of severe hemolysis, lipemia, jaundice, or other unqualified sample conditions.