Mitochondrial ROS, uncoupled from ATP synthesis, determine endothelial activation for both physiological recruitment of patrolling cells and pathological recruitment of inflammatory cells.

Mitochondrial reactive oxygen species (mtROS) are signaling molecules, which drive inflammatory cytokine production and T cell activation. In addition, cardiovascular diseases, cancers, and autoimmune diseases all share a common feature of increased mtROS level. Both mtROS and ATP are produced as a result of electron transport chain activity, but it remains enigmatic whether mtROS could be generated independently from ATP synthesis. A recent study shed light on this important question and found that, during endothelial cell (EC) activation, mtROS could be upregulated in a proton leak-coupled, but ATP synthesis-uncoupled manner. As a result, EC could upregulate mtROS production for physiological EC activation without compromising mitochondrial membrane potential and ATP generation, and consequently without causing mitochondrial damage and EC death. Thus, a novel pathophysiological role of proton leak in driving mtROS production was uncovered for low grade EC activation, patrolling immunosurveillance cell trans-endothelial migration and other signaling events without compromising cellular survival. This new working model explains how mtROS could be increasingly generated independently from ATP synthesis and endothelial damage or death. Mapping the connections among mitochondrial metabolism, physiological EC activation, patrolling cell migration, and pathological inflammation is significant towards the development of novel therapies for inflammatory diseases and cancers.

Common stressors, coping processes, and professional help-seeking of medical professionals in Hong Kong: A qualitative study.

Despite the high prevalence of perceived stress and mental health problems among medical professionals (MPs), their professional help-seeking is extremely low. This qualitative study explored MPs' stressors, stress-coping, barriers and facilitators of professional help-seeking. 10 MPs (30% male, Mage = 34.8 years) were recruited by purposive-sampling for views from different roles/settings. Thematic analyses revealed five central stressors: emerging novel diseases, challenges from technology-advancement, patient-communication difficulties, lack of workplace mental health care culture, excessive workload/manpower shortage. Participants predominantly used peer support/supervision and de-stress activities for stress-coping. Five factors affecting professional help-seeking were time constraint versus flexibility, mental health stigma versus de-stigmatization, concern over confidentiality/anonymity versus sense of privacy, worry about damage on professional role versus least work disruption, doubts of service providers versus perceived efficacy. All participants indicated a preference for online mental health service delivery. Results reflected unmet needs and service gaps from MPs' perspectives for the development of future interventions.

Publishing trends in Chinese medicine and related subjects documented in WorldCat.

BACKGROUND: Chinese medicine (CM) has been the subject of increasing interest in the past 30 years, both as a discipline and in the larger context of alternative medicine. It has steadily been accepted by and integrated into the medical and health-care fields in many countries. OBJECTIVE: This study aims to gain an overview of how CM has been interpreted and presented to the world outside China and to identify emerging trends. METHODS: This study is designed to analyse the publishing trends of CM and related subjects in all languages except Chinese, ranging from books and serials to audio-visual and electronic resources found in WorldCat, the world's largest bibliographic database produced by OnLine Computer Library Center (OCLC). RESULTS: The findings showed a flourishing growth of publications in CM and related subjects beginning in the 1970s with greater coverage on acupuncture. The materials in English language constitute the major portion of total output. CONCLUSION: We conclude that Chinese medicine has steadily gained recognition in the world based on the analysis of publication records. The translation of original works and analysis of journal literature and conference proceedings on Chinese medicine merit further study.