Problem considered
Type 2 diabetes mellitus (T2DM) is characterized by inappropriacy of innate immunity leading to higher rates of urinary tract infection (UTI), an important risk factor for urinary tract complications. 25-hydroxy vitamin D may donate, via the production of the antimicrobial peptide cathelicidin (LL-37), to epithelial host defense against colonization of uro-pathogens. This study aimed to assess serum levels of vitamin D3 and LL-37 in T2DM patients with and without UTI and to measure the association of these two parameters with metabolic profile and microbial distribution pattern.
Methods
Patients' characteristics were documented and included patients’ age, sex, duration of being diagnosed with T2DM, concurrent treatments, other diseases, body mass index, and smoking status. Blood sample was collected from each enrolled patient for metabolic profiling, serum vitamin D3, and LL-37 measurement. Urine sample was collected for urinalysis and patients were grouped accordingly into with-UTI (group A) and without-UTI (group B) groups.
Results
One hundred and twelve T2DM patients (aged 51.1 ± 5.8 years) were enrolled; 50 patients with UTI and 62 without. Serum levels of vitamin D3 were found to be significantly lower in patients with UTI (17.9 ± 4.8 ng/mL) than in patients without UTI (25.2 ± 5.7 ng/mL) (p < 0.01). In accordance, LL-37 levels were significantly reduced in group A members (27.5 ± 6.9 ng/mL) when compared to group B members (35.5 ± 8.6 ng/mL) (p-value <0.01). E. coli was the most common isolated uro-pathogen (40 %) followed by P. aeruginosa and S. aureus (14 % each), Enterobacter (10 %), Klebsiella spp (8 %) and Proteus spp (4 %). No significant difference in serum LL-37 levels was encountered between the three types of microbial isolates (p-value <0.05). A strong positive correlation was reported between LL-37 and vitamin D3 levels in patients without UTI (rs: 0.9855, p-value: <0.01). A weak, though non-significant, correlation was observed between LL-37 and vitamin D3 in patients with UTI (rs: 0.25283, p-value: >0.05).
Conclusion
Findings suggest that diminished serum levels of vitamin D3 and LL-37 could have clinical implications and could act as a potential immunological indicator for the tendency to develop UTI in diabetic patients.
扫码关注我们
求助内容:
应助结果提醒方式:
