Endoplasmic reticulum stress increases LECT2 expression via ATF4

Non-alcoholic fatty liver disease (NAFLD) is frequently associated with obesity, insulin resistance, and endoplasmic reticulum (ER) stress. Elevated circulating levels of the hepatokine leukocyte cell-derived chemotaxin-2 (LECT2) have also been noted in NAFLD; however, the mechanism underlying this association is unclear. To investigate a possible link between ER stress/unfolded protein response (UPR) signaling and LECT2 secretion, HepG2 cells were incubated with ER stress inducers with or without an ER stress-reducing chemical chaperone. Additionally, UPR pathway genes were knocked down and overexpressed, and a ChIP assay was performed. In diet-induced obese mice, hepatic expression of LECT2 and activating transcription factor 4 (ATF4) was measured. In HepG2 cells, LECT2 expression was increased by ER stressors, an effect blocked by the chemical chaperone. Among UPR pathway proteins, only knockdown of ATF4 suppressed ER stress-induced LECT2 expression, while overexpression of ATF4 enhanced LECT2 expression. The ChIP assay revealed that ATF4 binds to three putative binding sites on the LECT2 promoter and binding is promoted by an ER stress inducer. In steatotic livers of obese mice, LECT2 and ATF4 expression was concomitantly elevated. Our data indicate that activation of ER stress/UPR signaling induces LECT2 expression in steatotic liver; specifically, ATF4 appears to mediate upregulation of LECT2 transcription

포괄적 심장재활을 위한 마음챙김기반 상담프로그램의 개발 및 예비적 효과성: 사전연구

Background: While psychological intervention is recognized as a core component of cardiac rehabilitation (CR), its application in CR remains limited. This study aimed to develop a psychological counseling program (the Mindfulness-Based Counseling Program [MBCP]) as a component of comprehensive CR for the patients with cardiovascular disease and to explore its preliminary efficacy. Methods: We developed a psychological counseling program (MBCP) as part of comprehensive CR. The MBCP consisted of six-week psychological counseling and mindfulness practice. Through this program, we aimed to promote health maintenance behaviors and stress management. Thirteen subjects with either acute myocardial infarction or congestive heart failure with reduced EF (≤40%) participated, randomized into either comprehensive CR including MBCP (n=7) or exercise-based CR (n=6). Psychological-status assessments included life satisfaction (DSQ), health-related quality of life (HRQoL), depression (PHQ-9), ORIGINAL ARTICLEanxiety (GAD-7), type D personality, and stress (PSS). Results: The comprehensive CR group (n=7) experienced a significant decrease in anxiety and improvements in general health and mental aspects of HRQoL. The exercise CR group (n=6) experienced reduced depression and significantly increased mental aspects of HRQoL. Additionally, the overall satisfaction and participation rate for MBCP was high. Conclusions: The MBCP developed in this study showed preliminary efficacy for CR and is anticipated to enhance psychological wellbeing and the quality of life among cardiac patients.N