The decrease in the copy number of mitochondrial DNA (mtDNA) in cancer tissues might be associated with a decrease in oxidative mtDNA damage to achieve cancer immortalization and progression. Lung cancer specimens were collected from 29 patients with stage III non-small cell lung cancer (NSCLC) after neoadjuvant chemotherapy followed by surgical resection. The relative mtDNA copy number and the oxidative mtDNA damage (formation of 8-OHdG in mtDNA) of each cancer tissue were measured by quantitative real-time PCR. Seven female and 22 male lung cancer patients, with a mean age of 63.5 years were evaluated. Tumors of five patients became progressive, 13 stable, and 11 partially responsive after preoperative chemotherapy. Low mtDNA copy number (P=0.089) and low degree of oxidative mtDNA damage (P=0.036) were found to associate with tumor progression. Moreover, mtDNA copy number was significantly related to the degree of oxidative mtDNA damage (P=0.031). The mtDNA copy number and oxidative mtDNA damage were lower in advanced NSCLC after chemotherapy. This finding suggests that a decrease in the content of mtDNA may result in a decrease of mitochondrial density in cancer cells, which leads to a decrease of endogenous ROS production and reduction of ROS-triggered DNA damage to achieve immortalization.

Aim:To develop cut-off points of muscle mass, gait speed and handgrip strength; and to examine the prevalence of sarcopenia, and the relationship between sarcopenia stages and functional limitations and disability by using these cut-off points. Methods:We pooled individual participant data of 2867 community-dwelling older adults from five cohort studies. We defined the cut-off point of a muscle mass index (ASM/ht 2 ) as the values of two standard deviations below the sex-specific means of a young population or as the 20th percentile of the sex-specific distribution in our study population. The gait speed and handgrip strength cut-off points were defined as the 20th percentile of their population distributions. We also measured functional limitations, using the Short Physical Performance Battery, and the number of activities of daily living and instrumental activities of daily living difficulties. Results:We identified the cut-off points of ASM/ht 2 , gait speed and handgrip strength. By applying these cut-off points to our study population, the prevalence of sarcopenia varied from 3.9% (2.5% in women and 5.4% in men) to 7.3% (6.5% in women and 8.2% in men). A higher sarcopenia stage was independently associated with a lower summary performance score, as well as more activities of daily living and instrumental activities of daily living difficulties (P < 0.05 for all). Conclusions:The prevalence of sarcopenia in community-dwelling older adults is comparable with those in other populations. A dose-response relationship exists between sarcopenia stages and functional limitations/disability. The European Working Group on Sarcopenia in Older People consensus definition using these cut-off points is suitable for determining sarcopenia cases in the elderly population of Taiwan. Geriatr Gerontol Int 2014; 14 (Suppl. 1): 52-60.

Self-management intervention is a good method to improve self-care ability, as such, to promote quality of life. However, the research focused on self-management intervention in heart failure patients in Taiwan is very limited. Therefore, the purposes of this study were to test the effectiveness of self-management intervention in patients with heart failure in Taiwan and examine the relationship between self-care ability and quality of life. A quasi-experimental design was used in this study with convenience sampling. Of the 82 subjects participating in this study, 40 of them chose to join the experimental (self-management intervention plus usual care) and 42 of them chose to join control (usual care) group. Three questionnaires were used to collect the data, which were the demographic questionnaire, the self-care questionnaire (Self-Care of HF Index V 6), and the quality of life questionnaire (Minnesota Living with Heart Failure Questionnaire). To examine the effectiveness of the intervention, self-care ability and quality of life were measured, using a pretest, 1- and 2-month follow-up assessment. Generalized estimation equations (GEE) were used to compare changes over time among groups for outcomes to ensure the effectiveness of the intervention. This study confirmed the effectiveness of the self-management intervention. The clinical provider should increase the awareness of the importance of self-management skills and self-care ability especially for heart failure patients. The designated disease-specific self-management patient book and individualize intervention should be dispensing and implementing.