Publications by authors named "Young Chan Park"

Proteomics stands as the crucial link between genomics and human diseases. Quantitative proteomics provides detailed insights into protein levels, enabling differentiation between distinct phenotypes. OLINK, a biotechnology company from Uppsala, Sweden, offers a targeted, affinity-based protein measurement method called Target 96, which has become prominent in the field of proteomics.

View Article and Find Full Text PDF

Osteoarthritis is a prevalent, complex disease of the joints, and affects multiple intra-articular tissues. Here, we have examined genome-wide DNA methylation profiles of primary infrapatellar fat pad and matched blood samples from 70 osteoarthritis patients undergoing total knee replacement surgery. Comparing the DNA methylation profiles between these tissues reveal widespread epigenetic differences.

View Article and Find Full Text PDF

Objectives: Global cardiometabolic disease prevalence has grown rapidly over the years, making it the leading cause of death worldwide. Proteins are crucial components in biological pathways dysregulated in disease states. Identifying genetic components that influence circulating protein levels may lead to the discovery of biomarkers for early stages of disease or offer opportunities as therapeutic targets.

View Article and Find Full Text PDF

Genetic prediction of common complex disease risk is an essential component of precision medicine. Currently, genome-wide association studies (GWASs) are mostly composed of European-ancestry samples and resulting polygenic scores (PGSs) have been shown to poorly transfer to other ancestries partly due to heterogeneity of allelic effects between populations. Fixed-effects (FETA) and random-effects (RETA) trans-ancestry meta-analyses do not model such ancestry-related heterogeneity, while ancestry-specific (AS) scores may suffer from low power due to low sample sizes.

View Article and Find Full Text PDF

Background: Retinitis pigmentosa (RP) is an inherited disorder that causes progressive loss of vision. This study aimed to describe the possible causative variants of the gene in Korean RP families and their associated phenotypes.

Materials And Methods: We recruited 94 RP families (220 subjects, including 94 probands and 126 family members) in a Korean cohort, and analyzed gene variants through whole-exome sequencing.

View Article and Find Full Text PDF

Objective: Deep sequencing offers unparalleled access to rare variants in human populations. Understanding their role in disease is a priority, yet prohibitive sequencing costs mean that many cohorts lack the sample size to discover these effects on their own. Meta-analysis of individual variant scores allows the combination of rare variants across cohorts and study of their aggregated effect at the gene level, boosting discovery power.

View Article and Find Full Text PDF
Article Synopsis
  • Macrophages play a crucial role in maintaining body functions and are being explored for treating inflammation and cancer through cell-based therapies.
  • Human pluripotent stem cell (hPSC)-derived macrophages are a potential alternative to primary macrophages, but their biological consistency is still uncertain.
  • This study assesses the quality of iMACs (hPSC-derived macrophages) using single-cell RNA sequencing, highlighting its importance in ensuring the reliability of cell-based therapies.
View Article and Find Full Text PDF

Purpose: Virus-like particles (VLPs) are being developed as a promising vaccine platform and therapeutic delivery. Various strategies for effectively constructing VLPs have been studied, but relatively few studies have been done on various factors affecting storage. In this study, we investigated the antigenic changes of VLPs in an acidic or basic pH environment using influenza VLPs as an experimental model.

View Article and Find Full Text PDF
Article Synopsis
  • The human proteome serves as a bridge between complex diseases and their genetic and environmental factors, providing critical targets for drug development and biomarkers.
  • Researchers conducted high-depth whole-genome sequencing on 1,328 individuals to analyze 257 protein biomarkers related to cardiometabolic health, revealing 131 significant gene associations.
  • They identified rare genetic variants affecting protein production and created polygenic scores that can account for up to 45% of the variation in protein levels, uncovering potential biomarkers and drug targets linked to disease risks.
View Article and Find Full Text PDF

Purpose: In this study, we investigated whether the antigenic changes of the virus-like particles (VLPs) are affected by the temperature during storage.

Materials And Methods: After exposing the recombinant influenza VLPs to various temperatures for a period, antigenic changes were examined through hemagglutination receptor binding assay and mouse experiments.

Results: Influenza VLPs were exposed at three different temperatures of low, middle, and high on a thermo-hygrostat.

View Article and Find Full Text PDF
Article Synopsis
  • Copy number variants (CNVs) are significant in human diseases, but detecting them accurately is challenging due to the computational demand of current methods.
  • Using a regression tree-based method, researchers identified 1,320 CNVs from whole-genome sequencing data in 6,898 samples, with many events previously documented in the Database of Genomic Variants.
  • The study revealed associations between deletions and protein levels, including a complex relationship with CCL3 protein levels and a newly identified association between a rare NOMO1 deletion and its respective protein levels, highlighting the clinical relevance of CNVs.
View Article and Find Full Text PDF

In bone, sclerostin is mainly osteocyte-derived and plays an important local role in adaptive responses to mechanical loading. Whether circulating levels of sclerostin also play a functional role is currently unclear, which we aimed to examine by two-sample Mendelian randomization (MR). A genetic instrument for circulating sclerostin, derived from a genomewide association study (GWAS) meta-analysis of serum sclerostin in 10,584 European-descent individuals, was examined in relation to femoral neck bone mineral density (BMD; n = 32,744) in GEFOS and estimated bone mineral density (eBMD) by heel ultrasound (n = 426,824) and fracture risk (n = 426,795) in UK Biobank.

View Article and Find Full Text PDF

Purpose: Nitrocellulose membrane-based filtration system (NCFS) is widely used for protein concentration. In this study, we applied NCFS for production of virus-like particle (VLP) as a vaccine candidate and evaluated yield property and immunogenicity.

Materials And Methods: Influenza VLPs were generated by baculovirus-insect cell protein expression system.

View Article and Find Full Text PDF

Soy sauce prepared via direct fermentation of defatted soybean meal (DFSM) using halophiles without addition of dried, fermented soybeans or meju was evaluated. DFSM was fermented using single and mixed cultures of and under 18% salinity conditions. Amounts of total organic nitrogen, free amino acids, and organic acids in soy sauce prepared with the mixed culture were slightly higher than sauces prepared with single culture.

View Article and Find Full Text PDF

Small interfering RNA (siRNA)-mediated gene silencing represents a promising strategy for treating diseases such as cancer; however, specific gene silencing requires an effective delivery system to overcome the instability and low transfection efficiency of siRNAs. To address this issue, a polysorbitol-based transporter (PSOT) was prepared by low molecular weight branched polyethylenimine (bPEI) crosslinked with sorbitol diacrylate (SDA). Osteopontin (OPN) gene, which is highly associated with non-small cell lung cancer (NSCLC) was targeted by siRNA therapy using siRNA targeting OPN (siOPN).

View Article and Find Full Text PDF

Conventional lung cancer therapies are associated with poor survival rates; therefore, new approaches such as gene therapy are required for treating cancer. Gene therapies for treating lung cancer patients can involve several approaches. Among these, aerosol gene delivery is a potentially more effective approach.

View Article and Find Full Text PDF

We studied the toxicity of ZnO nanomaterials in terms of physicochemical characteristics and reactive oxygen species (ROS) properties. ZnO nanorods [synthesized at room temperature (ZnO-RT, length; 18.0±4.

View Article and Find Full Text PDF

Benign hypervascular hyperplastic nodules (HHN) in liver cirrhosis are very rare. It is important to distinguish between regenerative nodules (hyperplastic nodules) and tumorous nodules (dysplastic or neoplastic nodules) in hepatocellular nodular lesions. The differential diagnosis between HHN and hepatocellular carcinoma on the basis of radiologic imaging is often difficult, and is clinically important when determining the therapeutic plan.

View Article and Find Full Text PDF