Jang Hyun Park

T cells of the γδ lineage are unconventional T cells with functions not restricted to MHC-mediated antigen presentation. Because of their broad antigen specificity and NK-like cytotoxicity, γδ T-cell importance in tumor immunology has been emphasized. However, some γδ T-cell subsets, especially those expressing IL-17, are immunosuppressive or tumor-promoting cells. Their cytokine profile and cytotoxicity are seemingly determined by cross-talk with microenvironment components, not by the γδTCR ch

SARS-CoV-2 infection has recently been declared a pandemic. Some patients showing severe symptoms exhibit drastic inflammation and airway damage. In this study, we re-analyzed published scRNA-seq data of COVID-19 patient bronchoalveolar lavage fluid to further classify and compare immunological features according to the patient's disease severity. Patients with severe symptoms showed DNA damage and apoptotic features of epithelial cells. Our results suggested that epithelial damage was associate

Hypoxia is a hallmark of glioblastoma multiforme (GBM), the most aggressive cancer of the central nervous system, and is associated with multiple aspects of tumor pathogenesis. For example, hypoxia induces resistance to conventional cancer therapies and inhibits antitumor immune responses. Thus, targeting hypoxia is an attractive strategy for GBM therapy. However, traditional studies on hypoxia have largely excluded the immune system. Recently, the critical role of the immune system in the defen

The novel coronavirus, SARS-CoV-2, which causes COVID-19, has resulted in a pandemic with millions of deaths. To eradicate SARS-CoV-2 and prevent further infections, many vaccine candidates have been developed. These vaccines include not only traditional subunit vaccines and attenuated or inactivated viral vaccines but also nucleic acid and viral vector vaccines. In contrast to the diversity in the platform technology, the delivery of vaccines is limited to intramuscular vaccination. Although in

γδ T cells are a distinct subset of T cells expressing γδ T cell receptor (TCR) rather than αβTCR. Since their discovery, the critical roles of γδ T cells in multiple physiological systems and diseases have been investigated. γδ T cells are preferentially located at mucosal surfaces, such as the gut, although a small subset of γδ T cells can circulate the blood. Additionally, a subset of γδ T cells reside in the meninges in the central nervous system. Recent findings suggest γδ T cells in the me

A series of styrylquinazoline derivatives (2a-k) were prepared and evaluated for their inhibiton of prostaglandin E(2) (PGE(2)) production by cyclooxygenase-2 (COX-2). The latter was induced by lipopolysaccharide-stimulated macrophage cells RAW264.7. 3', 4'-Dihydroxylated styrylquinazolines (2a-c), 3'-hydroxylated styrylquinazolines (2h, 2i), and 3'-acetoxy-styrylquinazolines (2j, 2k) exhibited good inhibitory effects of PGE(2) production by COX-2 with a range of IC(50) values of 1.19 approximat

Obesity is detrimental to the immune system. It impairs lymphatics, T cell development, and lymphopoiesis; induces dysfunction of antitumor immunity; and also promotes tumor progression. However, direct evidence of the impact of obesity on viral infection is lacking. We report a protective role of obesity against herpes simplex virus 2 infection of the genital mucosa in mice. Although conventional antiviral immunity is comparable between obese mice and lean mice, obesity enhances the cytotoxic s

Oxygen is a vital component of living cells. Low levels of oxygen in body tissues, known as hypoxia, can affect multiple cellular functions across a variety of cell types and are a hallmark of brain tumors. In the tumor microenvironment, abnormal vasculature and enhanced oxygen consumption by tumor cells induce broad hypoxia that affects not only tumor cell characteristics but also the antitumor immune system. Although some immune reactions require hypoxia, hypoxia generally negatively affects i

Despite the therapeutic success of immune checkpoint blockade (ICB) therapy against multiple tumors, many patients still do not benefit from ICB. In particular, high-grade brain tumors, such as glioblastoma multiforme (GBM), have a very low response rate to ICB, resulting in several failed clinical trials. This low response rate might be caused by a lack of understanding of the unique characteristics of brain immunity. To overcome this knowledge gap, macroscopic studies of brain immunity are nee

혐기처리 녹차를 알루미늄 포장에 보관하여 상온, <TEX>$4^{\circ}C$</TEX>, <TEX>$-10^{\circ}C$</TEX>에 저장 시 품질관련 화학성분인 총질소, 총아미노산, 탄닌, 카페인, 엽록소, 비타민 C 및 지방산은 저장기간이 길어질수록 함량이 감소되었다. 각 성분의 함량 감소폭은 <TEX>$-10^{\circ}C$</TEX> 저장이 상온, <TEX>$4^{\circ}C$</TEX>에 비해 적었으며, 함량 감소는 상온에 비해 8개월, <TEX>$4^{\circ}C$</TEX>에 비해서는 4개월 정도 지연되었다. 저장 시녹색을 나타내는 'a'값이 감소할수록 품질이 저하되는데, 혐기처리 녹차의 표면 녹색을 나타내는 'a'값은 12개월 저장 시 상온 > <TEX>$4^{\circ}C$</TEX> > <TEX>$-10^{\circ}C$</TEX> 순으로 저장온도가 높을수록 녹색이 감소됨을 알 수 있었다. 형상, 향, 맛 등으로 평가하는 관능평가는 100점 만점에 점수

Obesity affects susceptibility to sexually transmitted diseases like genital herpes, caused by herpes simplex virus (HSV) 2. The γδ T cells in the vagina play a major role in HSV-2 suppression. Here, we present a protocol for inducing HSV-2 infection intravaginally in high-fat diet-induced obese mice. We describe steps for isolating single cells from vaginal tissue and analyzing cells using single-cell RNA sequencing and flow cytometry. We then detail confirmation of the γδ T cell phenotype in v