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