Publications by authors named "Keeok Haam"

Anaplastic lymphoma kinase (ALK; also known as ALK tyrosine kinase receptor) inhibitors (ALKi) are effective in treating lung cancer patients with chromosomal rearrangement of ALK. However, continuous treatment with ALKis invariably leads to acquired resistance in cancer cells. In this study, we propose an efficient strategy to suppress ALKi resistance through a meta-analysis of transcriptome data from various cell models of acquired resistance to ALKis.

View Article and Find Full Text PDF

Background/aims: Blocking the complement system is a promising strategy to impede the progression of metabolic dysfunction-associated steatotic liver disease (MASLD). However, the interplay between complement and MASLD remains to be elucidated. This comprehensive approach aimed to investigate the potential association between complement dysregulation and the histological severity of MASLD.

View Article and Find Full Text PDF

In contrast to normal cells, cancer cells predominantly utilise glycolysis for ATP generation under aerobic conditions, facilitating proliferation and metastasis. Targeting glycolysis is effective for cancer treatment. Prodigiosin (PDG) is a natural compound with various bioactivities, including anticancer effects.

View Article and Find Full Text PDF

Gastric cancer (GC) is a complex disease influenced by multiple genetic and epigenetic factors. Chronic inflammation caused by infection and dietary risk factors can result in the accumulation of aberrant DNA methylation in gastric mucosa, which promotes GC development. Tensin 4 (TNS4), a member of the Tensin family of proteins, is localized to focal adhesion sites, which connect the extracellular matrix and cytoskeletal network.

View Article and Find Full Text PDF
Article Synopsis
  • * Analysis found that the promoter was highly methylated in various gastric conditions (like tumors and dysplasia), indicating that abnormal methylation may start in healthy gastric tissue.
  • * Experiments showed that loss of function increased cell proliferation in certain cell lines, while introducing normal function reduced proliferation and tumor growth, highlighting a link between methylation, inflammation, and cancer development.
View Article and Find Full Text PDF
Article Synopsis
  • Ionic liquids (ILs) show potential in pharmaceuticals, particularly regarding their effect on the hypoxia-inducible factor (HIF)-1α, a target in cancer treatment.
  • The study reveals that dimethylaminopyridinium inhibits HIF-1α activation and reduces viability in colon cancer cells (HCT116) more than in normal cells (WI-38), especially when the alkyl chain length is increased.
  • It suggests that this compound works by diminishing HIF-1α levels under low oxygen conditions and interfering with mitochondrial function, thus regulating cancer cell metabolism and offering a promising avenue for cancer therapy.
View Article and Find Full Text PDF

Cereblon (CRBN) is a multi-functional protein that acts as a substrate receptor of the E3 ligase complex and a molecular chaperone. While CRBN is proposed to function in mitochondria, its specific roles are yet to be established. Here, we showed that knockdown of CRBN triggers oxidative stress and calcium overload in mitochondria, leading to disruption of mitochondrial membrane potential.

View Article and Find Full Text PDF

Hypoxia-inducible factor (HIF)-1 is an important regulator of the cellular response in the hypoxic tumor environment. While searching for HIF inhibitors derived from natural products that act as anticancer agents, we found that Glycyrrhiza uralensis exerts HIF-1 inhibitory activity in hypoxic cancer cells. Among the five components of G.

View Article and Find Full Text PDF

Pathological changes in the epigenetic landscape of chromatin are hallmarks of cancer. The caudal-type homeobox gene CDX2 is not expressed in normal gastric epithelia but rather in adult intestinal epithelia, and it is overexpressed in intestinal metaplasia (IM). However, it remains unclear how CDX2 transcription is suppressed in normal gastric epithelial cells and overexpressed in IM.

View Article and Find Full Text PDF

: Although programmed death-1 (PD-1) blockade is effective in treating several types of cancer, the efficacy of this agent in glioblastoma (GBM) is largely unknown. : We evaluated therapeutic effects of anti-PD-1, temozolomide (TMZ), and their combination in an orthotopic murine GBM model. The phenotype, number, and composition of lymphocytes were evaluated using flow cytometry.

View Article and Find Full Text PDF

DNA methylation is a regulatory mechanism in epigenetics that is frequently altered during human carcinogenesis. To detect critical methylation events associated with gastric cancer (GC), we compared three DNA methylomes from gastric mucosa (GM), intestinal metaplasia (IM), and gastric tumor (GT) cells that were microscopically dissected from an intestinal-type early gastric cancer (EGC) using methylated DNA binding domain sequencing (MBD-seq) and reduced representation bisulfite sequencing (RRBS) analysis. In this study, we focused on differentially methylated promoters (DMPs) that could be directly associated with gene expression.

View Article and Find Full Text PDF
Article Synopsis
  • ALK inhibitors are effective for fusion-positive lung cancer but face issues with acquired resistance, which may involve not just genetic mutations but also epigenetic changes.
  • Research showed that changes in histone H3K27ac and the remodeling of enhancers affected the expression of both miRNAs and mRNAs during the resistance development.
  • Targeting epigenetic pathways, rather than solely focusing on genetic mutations, could provide new strategies to overcome resistance to cancer therapies, as demonstrated by the effects of panobinostat along with ALK inhibitors.
View Article and Find Full Text PDF

The original version of this article unfortunately contained an error in the author name Dongchan Yang, which was incorrectly given as Dongchan Yang Sung.

View Article and Find Full Text PDF

The spatiotemporal regulation of immune cells in lymph nodes (LNs) is crucial for mounting protective T-cell responses, which are orchestrated by dendritic cells (DCs). However, it is unclear how the DC subsets are altered by the inflammatory milieu of LNs. Here, we show that the inflamed LNs of Listeria-infected mice are characterized by the clustering of neutrophils and monocytes and IFN-γ production.

View Article and Find Full Text PDF

BTB and CNC homology 2 (BACH2) is a lymphoid-specific transcription factor with a prominent role in B-cell development. Genetic polymorphisms within a single locus encoding BACH2 are associated with various autoimmune diseases and allergies. In this study, restriction landmark genomic scanning revealed methylation at a NotI site in a CpG island covering the BACH2 promoter in gastric cancer cell lines and primary gastric tumors.

View Article and Find Full Text PDF

The Popeye domain-containing (POPDC) genes BVES, POPDC2 and POPDC3 encode proteins that regulate cell-cell adhesion and cell migration during development. Herein, we report the frequent downregulation of BVES and POPDC3 by promoter hypermethylation in gastric cancer. POPDC expression in 11 gastric cancer cell lines and 96 paired gastric tumor and normal adjacent tissues was analyzed with quantitative reverse transcription-polymerase chain reaction.

View Article and Find Full Text PDF