About this trial
This part of the study enrolled 30 sex- and age-matched healthy controls, 30 diabetic patients without peripheral neuropathy, and 30 patients with diabetic peripheral neuropathy (DPN). Blood samples were collected from the participants, and serum was isolated for transcriptomics and untargeted metabolomics analysis using liquid chromatography-mass spectrometry (LC-MS) to characterize the metabolic profile of DPN. Through differential comparison analysis, serum biomarkers associated with DPN were identified and further correlated with clinical parameters. This approach aims to establish early diagnostic markers for DPN and provide scientific evidence for understanding the complex mechanisms underlying DPN, thereby offering new insights into potential therapeutic strategies.
Eligibility criteria
Qualifiers
Patients diagnosed with diabetes mellitus (type 1 or type 2)
For the diabetic peripheral neuropathy (DPN) group: meet diagnostic criteria for painful diabetic peripheral neuropathy (P-DPN), defined as persistent pain and/or paresthesia in both lower limbs, with at least one objective sign of neuropathy (reduced ankle reflex, reduced vibration perception, or abnormal nerve conduction velocity when available), and a DN4 score ≥ 4
For the diabetic control (DC) group: patients with diabetes mellitus but no evidence of peripheral neuropathy
For the healthy control (HC) group: healthy volunteers without diabetes or neuropathy, matched for sex and age
Disqualifiers
Peripheral neuropathy caused by factors other than diabetes, including but not limited to hypothyroidism, alcohol abuse, medications, genetic disorders, or other systemic diseases
Presence of limb ulcers, gangrene, or a history of skin ulceration or non-healing wounds
Acute diabetic complications such as diabetic ketoacidosis, hyperosmolar hyperglycemic state, lactic acidosis, or severe infections within the past 3 months
Severe hepatic or renal impairment, or severe cardiovascular or cerebrovascular diseases (e.g., unstable angina, myocardial infarction, multiple cerebral infarctions, cerebral hemorrhage)
Trial design
Treatments tested in this trial
- Not applicable- observational study