Characterization of circulating CD4+CD25high regulatory T cells in men with chronic prostatitis/chronic pelvic pain syndrome.
OBJECTIVE
To identify the characteristics of circulating CD4(+)CD25(high) regulatory T cells in chronic prostatitis/chronic pelvic pain syndrome (CP/CPPS). We sought to discover the possible mechanism underlying induction of CP/CPPS by autoimmune factors.


METHODS
A total of 69 men with CP/CPPS and 25 age-matched, asymptomatic controls underwent quantification of peripheral blood CD4(+)CD25(high) regulatory T cells, using flow cytometry, followed by measurement of interleukin (IL)-6, IL-10, tumor necrosis factor-alpha (TNF-alpha), and transforming growth factor-beta1 (TGFbeta1) in serum, and forkhead box P3 (FOXP3) mRNA level in peripheral blood mononuclear cells, using enzyme-linked immunosorbent assay and real-time quantitative reverse transcriptase-polymerase chain reaction, respectively.


RESULTS
The FOXP3 gene mRNA level in CP/CPPS patients was significantly lower than that in controls. Serum TNF-alpha level increased but the TGFbeta1 level decreased in CP/CPPS patients. No change was observed in the levels of IL-6 and IL-10. However, there was normal frequency of CD4(+)CD25(high) T cells in CP/CPPS patients. No differences were observed in expression of FOXP3 and serum cytokines and population of CD4(+)CD25(high) T cells between CP/CPPS IIIA and IIIB patients. In addition, statistically significant correlation was only found between serum IL-6 production and national institutes of health-chronic prostatitis symptom index total score of CP/CPPS patients. The frequency of CD4(+)CD25(high) T cells and FOXP3 expression level did not correlate with age, duration, and total national institutes of health-chronic prostatitis symptom index score of CP/CPPS patients.


CONCLUSIONS
FOXP3 and serum cytokines, such as TNF-alpha and TGFbeta1, might be important for the pathogenesis of CP/CPPS and possibly affect the suppressive function of CD4(+)CD25(high) regulatory T cells. This influence may result in the onset of CP/CPPS, but its assessment requires further study.
Bai
Jian
J
Department of Urology, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China.
Wang
Shaogang
S
Liu
Jihong
J
Ye
Zhangqun
Z
Yu
Xiao
X
Xi
Qilin
Q
Hu
Dongliang
D
Su
Shiqiang
S
D000293:Adolescent; D000328:Adult; D015496:CD4-Positive T-Lymphocytes; D006801:Humans; D053645:Interleukin-2 Receptor alpha Subunit; D008297:Male; D008875:Middle Aged; D011472:Prostatitis / Q000097:blood* / Q000276:immunology*; D050378:T-Lymphocytes, Regulatory / Q000276:immunology; D055815:Young Adult
D053645:Interleukin-2 Receptor alpha Subunit