ABSTRACT
BACKGROUND: Artificial insemination by donor (AID) is important to chance the pregnancy in male infertile couples by requiring appropriate medical, legal and ethical reviews. The purpose of this study was to investigate the perception changes of AID to collect the basic information for establishing the sperm donation, cryopreservation and artificial insemination management system. METHODS: We evaluated the people's thought of sperm donation, cryopreservation, and artificial insemination by donor by means of national inquiry survey from 247 infertile couples for 4 weeks from October 2016. The questionnaires were composed of 4 areas, and each questionnaire consisted of 15 items. Changes in the perception of AID by year were investigated after review of domestic journals. RESULTS: 67.6% of respondents knew the growth of couples with difficulty getting pregnant due to male infertility. 82.2% of respondents replied the necessary of sperm bank as a treatment option for infertility and 40.5% knew the donation and receipt system of sperm. In the survey of change perception of AID according to year, 37.5% and 39.5% of respondents were got information about AID from doctor in 2003 and 2004, but 49.6% from broadcasting in 2016. As a child grows up, 4.0% (2003), 9.0% (2014), and 42.8% (2016) of respondents answered to tell the child about AID. CONCLUSIONS: Infertile couple's thought of AID about the extension of opportunities for male infertility treatment is changed. In conclusion, it is necessary to establish institutional system of sperm donation, cryopreservation and artificial insemination prior to public sperm bank operation.
Subject(s)
Child , Humans , Male , Pregnancy , Cryopreservation , Ethical Review , Family Characteristics , Infertility , Infertility, Male , Insemination, Artificial , Sperm Banks , Spermatozoa , Surveys and Questionnaires , Tissue DonorsABSTRACT
BACKGROUND: There have been growing interests in harmful effects of dust particles on human health. It has been reported that dust particles negatively affected respiratory and cardiovascular systems. Relationship of dust particles and lung cancer incidence was also investigated. However, there is a lack of studies regarding the relationship between dust particles and cancers except for lung cancer. Therefore, this study aimed to determine the relationship of dust particle concentration and cancer mortality in Korea. METHODS: Average concentration of coarse dust particles (particulate matter 10, PM₁₀) of 2008-2014 were obtained from AirKorea website and cancer mortality was found in Statistics Korea for 2008-2014. Correlation analyses using PM₁₀ and cancer mortality were performed. Age-adjusted death rate (AADR) was used for correlation analysis because a number of death and mortality rate do not reflect population and age of death. Regional annual PM₁₀ was matched with AADR of identical area. Correlation between two variables was presented in scatter plots and Pearson's correlation analysis was performed. RESULTS: PM₁₀ concentration was positively correlated with AADR of malignant neoplasm, lung cancer, stomach cancer, colon cancer, uterus cancer, and leukemia. PM₁₀ concentration was significantly correlated with AADR of malignant neoplasm (r=0.247, P=0.009), lung cancer (r=0.277, P=0.003), stomach cancer (r=0.434, P=0.000), colon cancer (r=0.377, P=0.000), and uterus cancer (r=0.226, P=0.017). CONCLUSION: This study suggested that cancer patients or high-risk group for cancer should pay attention to PM₁₀ concentration. Large-scale studies should investigate the relationship of PM10 concentration and cancer incidence including cancer mortality to extend understanding of this cross-section study.
Subject(s)
Humans , Cardiovascular System , Colonic Neoplasms , Dust , Incidence , Korea , Leukemia , Lung Neoplasms , Mortality , Particulate Matter , Statistics as Topic , Stomach Neoplasms , Uterine NeoplasmsABSTRACT
Colon cancer is one of the major leading causes of cancer-related deaths in the Western countries. In Korea, the incidence of colon cancer is increasing due to changes in environment and lifestyle such as diet. Chemoprevention strategy using non-steroidal anti-inflammatory drugs (NSAIDs) has been under intensive clinical and epidemiological research as these drugs suppress colorectal cancer. The best known targets of NSAIDs are cyclooxygenase (COX) enzymes, which convert arachidonic acid to prostaglandins (PGs) and thromboxane. Among these PGs, prostaglandin E2 (PGE2) can promote tumor growth by binding its receptors and activating signal pathways which control cell proliferation, migration, apoptosis, and angiogenesis. Therefore, COX inhibition is promising approach for chemoprevention of colorectal cancer. However, the prolonged use of COX-2 inhibitors is associated with unacceptable cardiovascular side effects. Thus, new targets involved in PGs metabolism are under investigation. 15-hydroxyprostaglandin dehydrogenase (15-PGDH), a key metabolic enzyme of PGE2, was up-regulated in normal colonic epithelium, but decreased in colon cancer. Recent findings suggest that 15-PGDH is involved in the neoplastic progression of initiated colonic epithelial cells. Also, new players related with PGs metabolism including prostaglandin transporter (PGT) and microsomal prostaglandin E synthase (mPGES) were reported to play a role in colorectal cancer development. This review presents current knowledge about the role of prostaglandins and associated proteins in colorectal cancer development and progression.