{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,26]],"date-time":"2026-08-26T19:22:27Z","timestamp":1787772147772,"version":"build-2784847793"},"reference-count":35,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"3","content-domain":{"domain":["lww.com","ovid.com"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2024,5]]},"abstract":"<jats:title>\n                    A\n                    <jats:sc>BSTRACT<\/jats:sc>\n                  <\/jats:title>\n                  <jats:sec>\n                    <jats:title>Background:<\/jats:title>\n                    <jats:p>The urinary biomarker response precedes the appearance of any renal structural or functional derangement. Transforming growth factor-\u03b21 (TGF-\u03b21), neutrophil gelatinase associated lipocalin (NGAL), and Cystatin C (CysC) can act as the early prognostic markers in posterior urethral valve (PUV) patients.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Aim:<\/jats:title>\n                    <jats:p>To compare the urinary levels of TGF-\u03b21, NGAL, and CysC between PUV cases and age matched controls and to correlate these with renal structural and functional parameters.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Materials and Methods:<\/jats:title>\n                    <jats:p>This prospective study included children with PUV diagnosed using the standard investigations and an equal number of age-matched controls with nonurological problems. For the study subjects, the urinary samples were collected at three different time points (pre- and postoperatively at 3 and 6 months), whereas for controls, only single-voided samples were studied. The urinary levels of TGF-\u03b21, NGAL, and CysC were estimated by the standardized techniques using the ELISA kits. Statistical methods were used to drive the comparisons between cases and controls.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results:<\/jats:title>\n                    <jats:p>\n                      Fifteen children with a median age of 10 (5\u201348) months were enrolled in each of the two groups. The mean uTGF-\u03b21 in the case group was significantly higher at all three time points (43.20 \u00b1 6.13 pg\/ml, 43.33 \u00b1 11.89 pg\/ml and 40.71 \u00b1 9.01 pg\/ml) as compared to the control group (29.12 \u00b1 8.31 pg\/ml) (\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      \u2264 0.001). The median uNGAL in the case group was also higher (17.78 ng\/ml, 2.35 ng\/ml and 2.536 ng\/ml) as compared to the control group (1.31 ng\/ml). However, the difference was significant only preoperatively (\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      = 0.02). The median uCysC in case group was similarly higher (0.347 \u03bcg\/ml, 0.439 \u03bcg\/ml, and 0.382 \u03bcg\/ml) than the control group (0.243 \u03bcg\/ml) (\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      &gt; 0.05). Serum creatinine in the case group (0.49 mg\/dl) showed no significant rise above that of control (0.24 mg\/dl). A cutoff value of uTGF-\u03b21 = 36.55 pg\/ml (\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      &lt; 0.001), uNGAL = 0.879 ng\/ml (\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      = 0.02), and uCysC = 0.25 \u03bcg\/ml (\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      = 0.22) was found to be associated with renal damage in PUV. A significant correlation was found between uNGAL and S. creatinine at 3 months (\n                      <jats:italic toggle=\"yes\">r<\/jats:italic>\n                      = 0.43,\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      = 0.017) and 6 months (\n                      <jats:italic toggle=\"yes\">r<\/jats:italic>\n                      = 0.47,\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      = 0.08).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion:<\/jats:title>\n                    <jats:p>The elevated uTGF-\u03b21, a decline in uNGAL and an increase in uCysC suggests ongoing inflammation, improvement in hydronephrosis and a prolonged proximal tubular dysfunction in PUV patients, respectively.<\/jats:p>\n                  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