A Cohort Study on Treating Primary Nocturnal Enuresis by Regulating Central-Peripheral Circadian Rhythm

N/ANot Yet RecruitingNCT07003126

Shanghai Children's Medical Center200 enrolled

Overview

Primary nocturnal enuresis (PNE), a prevalent pediatric disorder, suffers from therapeutic limitations characterized by low efficacy and high relapse rates. Targeting its core pathophysiology could significantly improve treatment outcomes. Growing evidence implicates circadian dysregulation in PNE pathogenesis. Our preliminary fMRI cohort identified abnormal functional connectivity between the suprachiasmatic nucleus (SCN, the central circadian pacemaker) and superior temporal gyrus in PNE patients, with clinical data confirming circadian realignment correlates with symptom remission. Small-scale pilot studies and clinical observations indicate that modulating central and peripheral circadian rhythms significantly alleviates PNE symptoms. This study will establish a circadian-focused PNE cohort to quantify therapeutic efficacy and elucidate underlying mechanisms, ultimately driving the development of mechanism-based therapies for PNE.

The intervention training will last for 6 months. Researchers will compare the therapeutic efficacy of the "Circadian Rhythm Intervention Combined with Bladder Training Group (treatment group)" and the "Bladder Training (basic treatment for enuresis) Only Group (control group)" for PNE. Participants will be assigned to either the "Circadian Rhythm Intervention Combined with Bladder Training Group (treatment group)" or "Bladder Training (basic treatment for enuresis) Only Group (control group)" through stratified block randomization matching participants by sex (male/female), age (in years), and enuresis frequency. Within each stratified subgroup, block randomization with a 1:1 allocation ratio will be implemented using computer-generated random sequences, ensuring balanced demographic distribution between the two intervention arms while maintaining concealment of allocation sequence. In the "Circadian Rhythm Intervention Combined with Bladder Training Group (treatment group)", participants will receive a 6-month behavioral therapy including both bladder training and circadian rhythm intervention. Bladder training combined with circadian rhythm interventions involves sleep hygiene optimization, individualized chronotype alignment, morning bright light therapy and bladder training component. The bladder training component (basic treatment for enuresis) includes fluid intake modification, micturition desire-relaxation training, and sphincter control training. Clinical symptom severity and key pathophysiological parameters will be evaluated at baseline and at 6 months post-intervention. In the "Bladder Training Only Group (control group)", participants will receive a 6-month behavioral therapy including only bladder training. The bladder training component (basic treatment for enuresis) includes fluid intake modification, micturition desire-relaxation training, and sphincter control training. Clinical symptom severity and key pathophysiological parameters will be evaluated at baseline and 6 months post-intervention. The investigators will compare changes in enuresis improvement rate, resting-state functional magnetic resonance imaging data, sleep physiological parameters, salivary melatonin levels, diurnal and nocturnal urine volume, standardized bladder capacity, and grade scoring of the micturition desire-awakening function before and after the intervention.

Interventions

Circadian Rhythm Intervention Combined with Bladder TrainingBEHAVIORAL

Participants diagnosed with primary nocturnal enuresis will be screened at Shanghai Children's Medical Center, and eligible patients will be enrolled. Participants will be randomly assigned to the Bladder Training Combined with Circadian Rhythm Intervention Group, which will receive a 6-month integrated protocol encompassing bladder training and circadian rhythm intervention. The bladder training component includes fluid intake restriction, micturition desire-relaxation training, and sphincter control training. Circadian rhythm interventions involve sleep hygiene education, chronotype-guided bedtime scheduling, and morning bright light therapy.

Bladder Training (basic treatment for enuresis)BEHAVIORAL

Participants diagnosed with primary nocturnal enuresis will be screened at Shanghai Children's Medical Center, and those meeting eligibility criteria will be enrolled. Participants will be randomized to the Bladder Training Only Group, which will receive a 6-month intervention comprising fluid intake restriction, micturition desire-relaxation training, and sphincter control training.

Eligibility

Sex: ALLMin age: 5 YearsMax age: 15 Years

Medical Language ↔ Plain English

Inclusion Criteria: 1. Diagnosis according to the ICCS criteria: At least one episode of involuntary nighttime urination per month for more than 3 months. No abnormalities in routine urinalysis. No period of bedwetting-free days lasting more than 6 months, except for organic diseases. 2. Age: 5 to 15 years (inclusive), regardless of gender. 3. Right-handedness (as assessed by the Annett Hand Preference Questionnaire) Exclusion Criteria: 1. Secondary nocturnal enuresis; 2. History of head trauma, neurological disorders, psychosurgery, or major physical conditions (including autism spectrum disorder, epilepsy, cerebral palsy); 3. Contraindications to fMRI. 4. Note: Mild comorbidities commonly associated with primary nocturnal enuresis (e.g., ADHD) are permitted but must be included as covariates in statistical analyses.

Outcomes

Primary Outcomes

Enuresis Improvement Rate

The enuresis improvement rate is the sum of the complete and partial response rates. No response: \<50% reduction. Partial response: 50 to 99% reduction. Complete response: 100% reduction.