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Lim Jae-Won,Kim Chan Woo,Park Hyoung Ouk,Chung Eui Yup,Chae Chang Ho,Son Jun Seok,Shin Young Hoo,Park Seung Hyun,Choi Sang Moon 대한직업환경의학회 2023 대한직업환경의학회지 Vol.35 No.1
Background: Shift work has been shown to increase the risk of cardiovascular disease (CVD) based on several evidences. The classic risk factors of CVD include age, hypertension, smoking, obesity and diabetes. Recently, the serum homocysteine level has been reported to be a valuable indicator of CVD risk. This study aimed to determine the variation in serum homocysteine level as a cardiovascular risk indicator among female workers according to shift work. Methods: The data of regular health examination of workers at an electronic manufacturing services company in Yeongnam region, South Korea in 2019 were examined in this study. The investigation was based on a cross-sectional study conducted on 697 female workers (199 day workers and 498 shift workers). The sociodemographic and biochemical characteristics were compared between day workers and shift workers. Through a logistic regression analysis, the odds ratio (OR) of the increased serum homocysteine level in relation to shift work was determined. Results: Compared to female day workers, female shift workers showed significantly higher level of serum homocysteine (8.85 ± 2.16 vs. 9.42 ± 2.04 μmol/mL; p = 0.001). The OR of day workers against shift workers was 1.81 (95% confidence interval [CI]: 1.25–2.63). With the adjustment of variables that may influence the level of serum homocysteine, the adjusted OR was 1.68 (95% CI: 1.09–2.60). Conclusions: The serum homocysteine level was significantly higher in shift workers than in day workers. It is thus likely to be a useful predictor of CVD in shift workers.
조직아교를 이용하여 Hydroxyapatite 에 부착된 연골세포의 배양
이은우,강수용,장의찬,정상인,이상엽 ( Eun Woo Lee,Soo Yong Kang,Eui Chan Jang,Sang In Chung,Sang Yup Lee ) 대한슬관절학회 1995 대한슬관절학회지 Vol.7 No.2
Chondrocytes were obtained from femoral condyle of the rabbits and were cultured in the hydroxyapatite (HA) block with tissue glue. Scanning electron micrographs showed that outer surface and the inside of pores of HA were fiUed with cultured cells, and specific morphologic characteristic of chondrocyte was maintained after cultivation for 2 weeks. This composite grdt was implanted into osteachondral defect in the patellar groove of the rabbit femur to examiae the biologic effect of HA to the cultured chondrocyte. Hyaline-like cartilage matrix surmundirig the cells was present as early as 2 weeks implantation. The defect was filled with hyaline-like cartilage, HA was partiaIly resorbed in which the chondrocyte underwent hypertrophic degeneration toward bone formation. This results suggest that HA has a role of biocompatible carrier to transport the chondrocytes and this composite graft may be useful for the treatment of osteochondral defect.
The effect of shift work on high sensitivity C-reactive protein level among female workers
Ho Sung Kwak,Hyoung Ouk Park,Young Ouk Kim,Jun Seok Son,Chan Woo Kim,Jun Ho Lee,Young Hoo Shin,Seung Hyun Park,Eui Yup Chung,Chang Ho Chae 대한직업환경의학회 2019 대한직업환경의학회지 Vol.31 No.-
Background: This study assessed the association between shift work and high-sensitivity C-reactive protein (hs-CRP) level, a risk factor for cardiovascular disease (CVD), in female workers in electronics manufacturing services (EMS). Methods: Female EMS workers who received special medical examinations for workers in Gyeongnam, Korea between January 2017 and December 2017 were enrolled in this study. Their age, marital status, education level, alcohol consumption, smoking habit, regular exercise, quality of sleep, work stress, and depression were investigated, and blood tests were conducted. The t- and χ2 tests were conducted to compare the general and biochemical characteristics between daytime and shift worker groups. Age-adjusted partial correlation analysis was performed to examine the linear relationship between hs-CRP level and other risk factors for CVDs. In addition, the difference in hs-CRP levels according to work schedule was analyzed by ANCOVA after adjusting for variables that could affect the hs-CRP level. Results: Although the average hs-CRP levels did not differ significantly between daytime and shift workers (0.92 ± 1.87 and 1.07 ± 2.20 mg/dL, respectively), shift workers tended to show a higher hs-CRP level (p = 0.067). After adjusting for variables that can affect the hs-CRP level, the estimated average hs-CRP level was significantly higher in shift workers (1.325 ± 0.156 mg/dL) than that in daytime workers (0.652 ± 0.350 mg/dL) (p = 0.003). Conclusions: The results of this study identified a relationship between shift work and hs-CRP level increase in women. Because multiple studies have reported associations between increased hs-CRP and CVD, follow-up of hs-CRP may help early detection of CVD in shift workers.