Hwanwoo Lee

Osteogenesis is a complex process associated with dramatic changes in gene expression. To elucidate whether modifications in chromatin structure are involved in osteoblast differentiation, we examined the expression levels of histone deacetylases (HDACs) and the degree of histone acetylation at the promoter regions of osteogenic genes. During osteogenesis, total HDAC enzymatic activity was decreased with significant reduction in HDAC1 expression. Consistently, recruitment of HDAC1 to the promote

In bone marrow, osteoblasts and adipocytes are differentiated from mesenchymal progenitor cells and their differentiation is reciprocally regulated by largely unknown mechanisms. In this study, we investigated downstream signaling cascades of adiponectin, a member of the adipocytokine family, in the regulation of osteoblast differentiation. Adiponectin augmented expression of several osteogenic marker genes and increased osteoblast differentiation in mesenchymal progenitor cells. The expression

Berberine (BBR) has been implicated in bone biology. Although BBR reduces osteoporosis by enhancing BMD and inhibiting osteoclast activity, the effects of BBR on osteoblasts during the process of osteogenesis have not been thoroughly studied. In osteoblastic cells, BBR enhanced the expression of osteogenic marker genes including osteopontin and osteocalcin and promoted the transcriptional activity of the key osteogenic transcription factor Runx2. In osteoblasts, BBR increased the binding of Runx

BACKGROUND: The association between the location of non-small cell lung cancer (NSCLC) and prognosis is a debated issue. Some studies have provided evidence of better prognosis of upper lobe tumors than lower to middle lobe tumors, while other studies have reported contrasting conclusions. The aim of this study was to further assess this association through a systematic review and meta-analysis. METHODS: Medline, Embase, and the Cochrane Central Register of Controlled Trials were searched up to

These findings suggest that triple therapy can potentially be the best option for stable COPD patients in terms of reducing exacerbation and all-cause mortality.

Recently, the interest in natural products for the treatment ofcancer is increasing because they are the pre-screenedcandidates. In the present study, we demonstrate the therapeuticeffect of celastrol, a triterpene extracted from the rootbark of Chinese medicine on gastric cancer. The proliferationof AGS and YCC-2 cells were most sensitively decreased in sixkinds of gastric cancer cell lines after the treatment withcelastrol. Celastrol inhibited the cell migration and increasedG1 arrest in cell-

Background Recent studies on renin-angiotensin system (RAS) inhibitors have reported a reduced risk of Alzheimer’s disease (AD). Nevertheless, the effect of RAS inhibitor type and blood–brain barrier (BBB) permeability on the risk of AD is still unknown. Objectives To assess the effects of RAS inhibitors on the risk of AD based on the type and BBB permeability and investigate the cumulative duration-response relationship. Methods This was a population-based retrospective cohort study using the K

This systematic review and meta-analysis aimed to comprehensively evaluate the factors associated with mortality and progressive disease in NTM-LD patients. We conducted a literature search to identify the eligible studies, dated between January 1, 2007, and April 12, 2021. Forty-one studies with total 10,452 patients were included. The overall all-cause mortality rate was 20% (95% CI 17-24%). The overall rates of clinical and radiographic progressive disease were 46% (95% CI 39-53%) and 43% (95

Pre-hospitalization use of ACE inhibitors or ARBs for sepsis was an independent factor for a lower rate of in-hospital mortality.

BACKGROUND: Various combinations of inhaled corticosteroid (ICS), long-acting muscarinic antagonist (LAMA), and long-acting beta-agonist (LABA) have been used as triple therapy for stable chronic obstructive pulmonary disease (COPD). OBJECTIVE: Our study was conducted to answer whether there were significant differences among various combinations in efficacy, for reducing exacerbation or mortality, and in safety, for increasing cardiovascular events or pneumonia. METHOD: We searched parallel-gro

PURPOSE:: Uric acid acts as both a pathogenic inflammatory mediator and an antioxidative agent. Several studies have shown that uric acid level correlates with the incidence, severity, and prognosis of pulmonary diseases. However, the association between uric acid level and acute respiratory distress syndrome (ARDS) has not been studied. This study was conducted to elucidate how serum uric acid level is related with clinical prognosis of ARDS. METHODS:: A retrospective cohort study with propensi

The development of pneumonia delayed viral clearance in patients with mild COVID-19. Elderly patients or those suffering from diarrhea should be closely monitored, given the increased risk of developing pneumonia.