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Research Support, Non-U.S. Gov't
Relationship Between Depression Anxiety Stress Scale (DASS) and Urinary Hydroxyproline and Proline Concentrations in Hospital Workers.
Keou Won Lee, Soo Jeong Kim, Jae Beom Park, Kyung Jong Lee
J Prev Med Public Health. 2011;44(1):9-13.
DOI: https://doi.org/10.3961/jpmph.2011.44.1.9
  • 6,827 View
  • 153 Download
  • 19 Crossref
AbstractAbstract PDF
OBJECTIVES
Although increased reactive oxygen species (ROS) is caused by stress accelerates collagen degradation, there was no data on the relationship between stress and urinary hydroxyproline (Hyp) and proline (Pro), a good marker of collagen degradation. The purpose of this study was to evaluate the relationship between depression, anxiety, and stress (DAS) and concentrations of urinary Hyp and Pro. METHODS: 97 hospital employees aged 20 to 58 were asked to fill out comprehensive self-administrated questionnaires containing information about their medical history, lifestyle, length of the work year, shit-work and DAS. Depression Anxiety Stress Scale (DASS) was applied to evaluate chronic mental disorders. Urine samples were analyzed using High Performance Liquid Chromatography (HPLC) with double derivatization for the assay of hydroxyproline and proline. RESULTS: The mean value of Hyp and Pro concenturation in all subjects was 194.1+/-113.4 micromol/g and 568.2+/-310.7 micromol/g. DASS values and urinary Pro concentrations were differentiated by sex (female > male, p < 0.05) and type of job (nurse > others, p < 0.05). In the stepwise multiple linear regressions, urinary Hyp and Pro concentrations were influenced by stress (Adjusted r2 = 0.051) and anxiety and job (Adjusted r2 = 0.199), respectively. CONCLUSIONS: We found that stress and anxiety were correlated with urinary Hyp and Pro concentrations. To identifying a definite correlation, further study in large populations will be needed.
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Original Article
Determination of Free 4-hydroxyproline with Dansylchloride by HPLC in Human Urine.
Keou Weon Lee, Kyung Jong Lee, Young Bong Cho
Korean J Prev Med. 2002;35(4):282-286.
  • 14,356 View
  • 44 Download
AbstractAbstract PDF
OBJECTIVES
The level of 4-hydroxyproline (4-Hyp) in human urine was measured using high performance liquid chromatography (HPLC) with a fluorescence detector. This method is useful for medical examinations and investigating the radicals induced by physical, chemical, mental stresses. This method is superior to many published several methods in terms of its low cost and ability to analyze many samples. METHODS: The urine from workers in a tire manufacturing company (22 male pre- and post-shift workers) and 18 office-workers as controls were analyzed. Data concerning age, the cumulative drinking amount and the cumulative smoking amount was collected with a questionnaire. The optimum applied amount of dansyl-Cl, the optimum reaction temperature and time, the recoveries and the optimum pH of the eluent and buffer were determined. 4-Hyp from human urine was derivatized with dansyl-Cl (dimethylamino-naphthalene-1-sulfonyl chloride) after removing the alpha-amino acid by a treatment with phthalic dicarboxaldehyde (OPA) and cleaned with Bond Elut C18 column. The 4-Hyp derivatives were separated on a reversed phase column by gradient elution with a phosphate buffer (5 m mol, pH 8.0) and acetonitrile, and detected by fluorescence measurements at 340 nm (excitation) and 538 nm (emission). RESUJLTS: The detection limit for the urinary free 4-Hyp was 0.364 micro mol/l. The recovery rate of 4-Hyp was 99.7 %, and the effective pH of the phosphate buffer and borate buffer were 3.0 and 8.0, respectively. From statistical analysis, age, drinking and smoking did not affect the urinary free 4-Hyp in both the controls and workers. The range of urinary 4-Hyp in the controls, pre-shift, and post-shift workers were 0.33-16.44, N.D-49.06, and 0.32-56.27 micro mol/l. From the pared-sample t-test, the urinary 4-Hyp levels in post-shift workers (11.82+/-16.73 n mol/mg Cre) were 2-fold higher than in pre-shift workers (5.36+/-5.53 n mol/mg Cre) and controls (4.91+/-4.89 n mol/mg Cre). CONCLUSIONS: This method was developed with high sensitivity, accuracy, and precision. The present method was effectively applied to analyze the urinary free 4-Hyp in both controls and workers.
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