Seung-hee Yoo

Mammalian circadian rhythms are regulated by the suprachiasmatic nucleus (SCN), and current dogma holds that the SCN is required for the expression of circadian rhythms in peripheral tissues. Using a PERIOD2::LUCIFERASE fusion protein as a real-time reporter of circadian dynamics in mice, we report that, contrary to previous work, peripheral tissues are capable of self-sustained circadian oscillations for >20 cycles in isolation. In addition, peripheral organs expressed tissue-specific differenc

The relationship between emotional intelligence (EI)measured as an ability and an individual's initial emotional responses to hypothetical and actual frustrating stressors was examined in 2 studies. In Study 1, participants imagined they had to repeat an experiment due to an error by the experimenter. In Study 2, participants experienced the situation described in Study 1. In both studies, higher scores on the MSCEIT, an ability-based measure of EI, were associated with greater self-reported fru

The mouse Period2 (mPer2) locus is an essential negative-feedback element of the mammalian circadian-clock mechanism. Recent work has shown that mPer2 circadian gene expression persists in both central and peripheral tissues. Here, we analyze the mouse mPer2 promoter and identify a circadian enhancer (E2) with a noncanonical 5'-CACGTT-3' E-box located 20 bp upstream of the mPer2 transcription start site. The E2 enhancer accounts for most circadian transcriptional drive of the mPer2 locus by CLOC

Significance The circadian oscillator is a cell-autonomous biological timer driving daily physiological rhythms to ensure fitness and health. Regulatory mechanisms of the oscillator are complex and not fully understood. We previously generated two circadian reporter mouse lines that differ only in the 3′-UTR region of the core clock gene Per2 . Interestingly, substitution of the endogenous Per2 3′-UTR with an SV40 late poly(A) signal led to a lengthened period, enhanced PER2 protein level, and m

Growing evidence demonstrates circadian rhythms of pain hypersensitivity in various chronic disorders. In chemotherapy-induced peripheral neuropathy (CIPN), agents such as paclitaxel are known to elicit chronic neuropathic pain in cancer patients and seriously compromise their quality of life. Here, we report that the mechanical threshold for allodynia in paclitaxel-treated rats exhibited a robust circadian oscillation, reaching the nadir during the daytime (inactive phase). Using Per2::LucSV ci

The effects of communal motivation on reactions to relationship partners' expressed anger were examined. In Study 1, married couples reported on the communal strength of their marriage, their expressions of anger to their spouse, and relationship satisfaction. In Study 2, college students reported on the communal strength of their best friendships, those friends' expressions of anger, and their evaluations of and provision of support to those friends. In Study 3, communal motivation toward a str

The Bcl-2 protein is known to exert not only anti-apoptotic but also anti-autophagic activities. Numerous studies have demonstrated that etoposide, which is one of the most widely used cancer chemotherapy agents, induces apoptotic cell death. However, the exact molecular mechanism leading to cell death by etoposide remains to be resolved. This study aimed to dissect the mode of cell death induced by etoposide in Hep3B hepatoma cells. Furthermore, this study was conducted to examine whether etopo

Erosive changes in esophagogastroduodenal mucosa were strongly correlated with increased VSC levels, suggesting that halitosis might result from H. pylori-associated erosive lesions.

Previous studies reported that a Gamitrinib variant containing triphenylphosphonium (G-TPP) binds to mitochondrial Hsp90 and rapidly inhibits its activity to induce apoptosis. We investigated the mechanisms underlying the antitumor activity of G-TPP in Hep3B hepatocellular carcinoma cells. Contrary to our predictions, we observed mitochondrial elongation in the G-TPP-treated Hep3B cells undergoing apoptosis. We found that the G-TPP-induced mitochondrial elongation in Hep3B cells was caused by a

Background and Objectives: Local infiltration analgesia (LIA) represents a potential approach to reducing pain in patients undergoing total hip arthroplasty (THA). The pericapsular nerve group (PENG) block also provides adequate analgesia for fractures and THA. As most hip surgeries use a lateral incision, affecting the cutaneous supply by branches of the lateral femoral cutaneous nerve (LFCN), the LFCN block can contribute to postoperative analgesia. However, no studies have investigated the ef

Although alpha (α)B-crystallin is expressed in articular chondrocytes, little is known about its role in these cells. Protein kinase casein kinase 2 (CK2) inhibition induces articular chondrocyte death. The present study examines whether αB-crystallin exerts anti-apoptotic activity in articular chondrocytes. Primary rat articular chondrocytes were isolated from knee joint slices. Cells were treated with CK2 inhibitors with or without αB-crystallin siRNA. To examine whether the silencing of αB-cr