• Asian Pacific Journal of Cancer Prevention
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• v.14 no.1
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• pp.399-403
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• 2013

Background: Several studies have reported the role of the miR-146a rs2910164 G > C polymorphism as a susceptibility factor for several digestive cancers. However, the results have been controversial. Therefore, we conducted the present meta-analysis to obtain the most reliable estimate of the association. Methods: PubMed, Embase and Web of Science databases were searched. Crude odds ratios (ORs) with 95% confidence intervals (CIs) were extracted and pooled to assess the strength of the association between miR-146a rs2910164 G > C polymorphism and digestive cancer risk. A total of four eligible studies including 3,447 cases and 5,041 controls based on the search criteria were included. Results: We observed that miR-146a rs2910164 G > C polymorphism was not significantly correlated with digestive cancer risks when all studies were pooled into the meta-analysis. While we found that miR-146a rs2910164 polymorphism was not associated with gastric cancer, it was significantly linked with hepatocellular cancer risk (the homozygote codominant model: OR = 1.40, 95% CI = 1.04-1.87). In the stratified analysis by ethnicity, significant associations were observed in Chinese population for the allele contrast model (OR = 1.25; 95% CI = 1.12-1.38), for the homozygote codominant model (OR = 1.62; 95% CI = 1.28-2.04), and for the recessive model (OR = 1.38; 95% CI = 1.16-1.64). However, studies with Asian groups presented no significant association for all genetic models. Conclusions: This meta-analysis suggests that the miR-146a rs2910164 G > C polymorphism is a low-penetrant risk factor for digestive cancers in Chinese.

• Asian Pacific Journal of Cancer Prevention
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• v.14 no.3
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• pp.1615-1621
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• 2013

Background: Matrix metalloproteinase 9 (MMP-9) is related to tumor invasion and metastasis. However, the role of MMP-9 expression in breast cancer survival remains controversial. The purpose of this study was to accomplish a more accurate estimation of the association between MMP-9 expression and survival results in breast cancer patients through meta-analysis. Methods: A meta-analysis of published studies investigating the effects of positive MMP-9 expression on both relapse free survival (RFS) and overall survival (OS) was performed. Relevant literature was confirmed by searching electronic databases including PubMed, Ovid, EMBASE and China National Knowledge Infrastructure (CNKI) before November 1, 2012. Individual hazard ratios (HRs) and 95% confidence intervals (CIs) were extracted and pooled HRs with 95% CIs were used to evaluate the strength of the association between positive MMP-9 expression and survival results of breast cancer patients. Funnel plot and Egger's regression tests were used to evaluate publication bias. Heterogeneity and sensitivity analysis was also conducted. All the work was completed using STATA. Results: A total of 2,344 patients from 15 evaluative studies were finally included. Pooled HRs and 95% CIs suggested that MMP-9 overexpression had an unfavorable impact on both OS (HR: 1.70, 95% CI: 1.41-2.04) and RFS (HR: 1.54, 95% CI: 1.17-2.01) in breast cancer patients. There was no significant heterogeneity observed in the studies reported for OS (P=0.360, $I^2$=8.8%), but not RFS (P=0.002, $I^2$=67%). Publication bias was absent among the studies both in OS and RFS cases (t=-0.54, P=0.605 and t=1.71, P=0.131, respectively). Omission of any single study had little effect on the combined risk estimates on sensitivity analysis. Conclusion: The results of this meta-analysis suggest that positive MMP-9 expression confers a higher risk of relapse and a worse survival in patients with breast cancer. Larger prospective studies are now needed to evaluate the clinical utility of MMP-9 expression.

• Asian Pacific Journal of Cancer Prevention
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• v.15 no.21
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• pp.9107-9112
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• 2014

Purpose: To investigate and study the relationship between the PLCE1 rs2274223 gene polymorphism and susceptibility to esophageal cancer by meta-analysis. Materials and Methods: The literature was searched in Wanfang, CNKI, PubMed, CBM, Web of Science, MEDLINE, EMBASE, Springer, Elsevier and Cochrane databases from the date of January $1^{st}$ 2004 to April $1^{st}$ 2014 to collect case-control studies on the PLCE1 polymorphism and susceptibility to esophageal cancer. For the population genotype distributions of both esophagus cancer and control groups, their odds ratios (ORs) and 95% confidence intervals (CIs) were taken as effect indexes. Disqualified studies were excluded. Odds ratios of PLCE1 rs2274223 genotype distributions in the group of patients with esophageal cancer and the group of healthy control were calculated. The metaanalysis software, RevMan5.0, was applied for heterogeneity test, pooled OR and 95% confidence intervals. Sensitivity analysis and publication bias were also explored. Results: A total of twelve case-control studies were included, covering a total of 9, 912 esophageal cancer cases and 13, 023 controls were included. The pooled odds ratio of PLCE1 rs2274223 genotype GA vs AA was 1.29 (95%CI=1.17~1.43), p<0.01, GG vs AA was 1.65 (95%CI=1.32~2.05), p<0.01, GG/GA vs AA was 1.30 (95%CI=1.16~1.46), p<0.01 and GG vs GA/AA was 1.48 (95%CI=1.22~1.80), p<0.01. The PLCE1 rs2274223 polymorphism was thus associated with risk of esophageal cancer in all genetic models. In the stratified analysis by ethnicity, and source of controls, no significantly increased risk was observed for white persons. There was no obvious publication bias detected. Conclusions: This meta-analysis showed there was a significantly association between PLCE1 rs2274223 polymorphism and esophageal cancer in yellow race populations. Due to some minor limitations, our findings should be confirmed in further studies.

• Journal of Aquaculture
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• v.9 no.2
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• pp.125-132
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• 1996

A study was carried out to test sex ratio of the progeny that were induced by the artificial fertilization between normal female and gynogenetic diploid eggs and sex-reversed gynogenetic diploid male sperm. Sex reversed gynogenetic diploid males were produced successfully in gynogenetic diploid female by immersion treatment with $17{\alpha}$-methyltestosterone at the concentration of 10 pub from $13.5{\pm}0.22$ mm to $57.6{\pm}5.1$ mm in total length. In $F_1$ progeny test, matings between normal females and sex-reversed gynogenetic males were not produced all female, but matings between gynogenetic diploid females and sex-reversed gynogenetic males were produced all female populations in six out of eight groups and two lots produced $96.9\%$ and $95\%$ female. These data showed that all-female populations were produced by crossing between gynogenetic diploid female and sex reversed gynogenetic diploid male.

• Journal of Korean Medicine Rehabilitation
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• v.26 no.4
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• pp.45-55
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• 2016

Objectives The aim of this review is to provide fundamental data for temporomandibular disorders diagnosis and evaluation criteria which can be used in clinical trial. Methods We investigated the clinical studies on temporomandibular disorders via PubMed. Also, we searched domestic articles through "OASIS", "NDSL", "KISS", "Korean Traditional Knowledge Portal (KTKP)". The articles we focused on were the recent decade from 2007 to 2016. A total of 139 studies were analyzed: 42 domestic articles and 97 overseas articles. This study focuses on the diagnosis and evaluation criteria on temporomandibular disorders. Results 1) In diagnosis criteria, Research Diagnostic Criteria for Temporomandibular Disorders (RDC/TMD) was used 14 times in domestic articles and 63 times in overseas articles. Clinical symptoms were used 13 times in domestic articles, 17 times in overseas articles. 2) In evaluation criteria, Visual Analog Scale (VAS) was used as a pain scale 12 times in domestic articles, 63 times in overseas articles. Pressure Pain Threshold (PPT) was used 16 times in overseas articles. Whereas, no clinical trials used PPT in domestic articles. In psychological scale, Symptom Checklist-90-Revised (SCL-90-R) was used 6 times. However, SCL-90-R was used 2 times in domestic articles. ROM(Maximum Mouth Opening (MMO), Maximum Comfortable Opening (MCO) were used 24 times in overseas. In domestic articles, MMO was counted 12 times, while MCO was counted 5 times. Conclusions This research reviewed the tendency of using diagnosis methods and evaluating outcomes of the clinical on TMD. It is expected that this investigation would develop further treatment for TMD in the Korean Medicine.

• Journal of Korean Medicine Rehabilitation
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• v.26 no.4
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• pp.57-65
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• 2016

Objectives Our goal was to review literatures on tool-based manipulation for musculoskeletal diseases with emphasis on guasha and IASTM (Instrument Assisted Soft Tissue Manipulation) by searching foreign and domestic controlled trials. Methods We found literatures published up to August 2016 in electronic databases (OASIS, KoreaMed, KMbase, NDSL, RISS, KISS, MEDLINE/PubMed, EMBASE, Cochrane Central Register of Controlled Trials) without any limitations on language. Results 17 studies were included in the review. 13 out of 17 articles were published within this decade. VAS was the main evaluation tool for most of the articles (14 out of 17). 10 studies showed statistically significant difference between the experimental group and the control group. In terms of materials used for treatment, 6 out of 17 studies used stainless steel. Considering anatomical locations for treatment, trunk area was treated the most, accounting for 7 out of 17 studies. Conclusions Our results show that recently, research on tool-based manipulation treatments for musculoskeletal diseases are actively being performed. Diseases of the vertebral column were the main target for tool-based manipulation treatments, and stainless steel was the most popular and safe material used. Further research should be performed for more accurate data.

• Journal of the korean academy of Pediatric Dentistry
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• v.43 no.2
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• pp.123-128
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• 2016

The purpose of this study is to analyze the equality between keywords used in the Journal of the Korean Academy of Pediatric Dentistry and medical subject headings (MeSH). A total of 4,353 English keywords in 1,165 papers from 1998 to 2014 were eligible for this study. We classified them according to equality to MeSH. We assayed patterns of errors in using MeSH, and reviewed frequently used non-MeSH terms. 24.9% of total keywords were completely coincident with MeSH terms, 75.1% were not MeSH terms. The results show that the accordance rate of keywords with MeSH terms in the Journal of the Korean Pediatric Dentistry is at a low level. Therefore, there is a need for authors to understand MeSH more specifically and accurately. Use of proper keywords aligned with the international standards such as MeSH is important to be properly cited. Authors should pay attention and be educated on the correct use of MeSH as keywords.

• Korean Journal of Biological Psychiatry
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• v.24 no.1
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• pp.19-25
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• 2017

Previous studies have found that firefighters have a tenfold higher prevalence of Parkinson's disease (PD) compare to the general population. Firefighters are constantly exposed to various occupational hazards including toxic chemicals of fire residue and the toxic chemicals can effects development and progression of PD. Nevertheless, there were no studies about the association between exposure to chemical byproducts of combustion and the development of PD among firefighters. Thus the aim of this study is to look into existing researches regarding the effect of chemical byproducts of combustion on the development of PD. An extensive literature search was conducted to identify harmful chemical components of smoke and fire residue, using the PubMed database during November of 2016. We searched for relevant articles by combining several keywords that contained "Parkinson's disease" and each of the different toxic chemicals, yielding a total of 1401 articles. After applying the selection criteria, 12 articles were chosen. Chemical substances reported to have a harmful effect on PD, in at least one article, were carbon monoxide, toluene, manganese and lead. Carbon monoxide and metal substances including manganese and lead were found to be associated with an increased PD risk in more than two articles. There was a heightened risk of PD in firefighters due to exposure of chemical byproducts of combustion including carbon monoxide, toluene, manganese and lead. However, to the best of our knowledge, to support this result we need more systematic epidemiological studies about these risk factors of PD among firefighters. In addition, further studies for the effects of prolonged exposure to toxic fire residue on the development and progression of PD in firefighters are needed.

• Korean Journal of Biological Psychiatry
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• v.24 no.2
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• pp.59-67
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• 2017

Shift workers experience a disruption in the circadian sleep-wake rhythm, which brings upon adverse health effects such as fatigue, insomnia and decreased sleep quality. Moreover, shift work has deleterious effects on both work productivity and safety. In this review, we present a brief overview of the current literature on the consequences of shift work, especially focusing on attention-associated cognitive decline and related behavioral changes. We searched two electronic databases, PubMed and RISS, using key search terms related to cognitive domains, deleterious effects, and shift work. Twenty studies were eligible for the final review. The consequences of shift work can be classified into the following three categories extracted from the literature review : 1) work accidents ; 2) commuting accidents such as car accidents that occur on the way to and from work ; and 3) attendance management at work (i.e., absenteeism, tardiness, and unscheduled early departure). These cognitive and behavioral consequences of shift work were also found to be associated with sleep disorders in shift workers. Thus, improvements in the shift work system are necessary in order to enhance workers' health conditions, work productivity, and safety.

• The Journal of Internal Korean Medicine
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• v.37 no.6
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• pp.929-939
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• 2016

Objectives: Strokes have diverse symptoms and signs. One of ten stroke patients has chronic pain after a stroke. Pain after a stroke interrupts rehabilitation and worsens quality of life, but there is no efficient treatment for this pain. This study surveyed and reports on the clinical studies of treatment for chronic pain after a stroke. Methods: We searched journals for reports on clinical studies of treatment for chronic pain after a stroke through the databases OASIS (http://oasis.kiom.re.kr), NDSL (ndsl.kr), Kmbase (http://kmbase.medric.or.kr/), and PubMed (http://www. pubmed.com). The search words were "stroke & pain", "jungpung中風 & pain", "pungbi風痺", "cerebral hemorrhage & pain", and "cerebral infarction & pain". Results: Twenty-nine studies of treatment for chronic pain after a stroke were found. Of these, 15 were randomized controlled trials, 10 were nonrandomized controlled trials, and 4 were "before and after" studies. Treatments were diverse, including acupuncture, electroacupuncture, herbal acupuncture, herbal medicine, and more. The treatment periods were longer than 3 weeks on average. Conclusions: These results show that good quality randomized controlled trials of treatment for chronic pain after a stroke are small in number. We need larger and more diverse studies of treatment for chronic pain after a stroke.