Chan-Sik Park

University of Ulsan, Ulsan, Ulsan, South Korea

Are you Chan-Sik Park?

Claim your profile

Publications (67)162.29 Total impact

  • [Show abstract] [Hide abstract]
    ABSTRACT: Function of cellular prion protein (PrPc) in cancer progression has not been elucidated yet. Ectopic expression of PrPc increases the invasion and migration of breast cancer cell line, MCF-7 cells. Overexpressed PrPc increases matrix metalloprotease-9 (MMP-9) expression by enhancing association of NF-κB in promoter of MMP-9 gene and ERK signaling in MCF-7 cells. Whereas, silencing of PrPc by siRNA suppresses ERK activation and MMP-9 expression resulting the down-regulation of MD-MB231 cell migration and invasion. Overall, these results suggest that PrPc contribute the breast cancer invasion and migration via MMP-9.
    No preview · Article · Jan 2016 · Biochemical and Biophysical Research Communications
  • [Show abstract] [Hide abstract]
    ABSTRACT: Few studies have evaluated the histopathologic features of cutaneous extranodal NK/T-cell lymphoma, and the histopathologic spectrum of this disease according to its clinical morphology remains unclear. This study investigated the differences in pathologic findings of cutaneous extranodal NK/T-cell lymphoma depending on clinical morphology. A total of 41 cases of cutaneous extranodal NK/T-cell lymphoma were included. Skin lesions were classified according to clinical morphology as: 1) nodular lesions, 2) cellulitis or abscess-like swellings, and 3) erythematous to purpuric patches. Histopathologic variables were compared between groups. Perivascular infiltration of tumor cells and vasculopathy in the dermis and subcutaneous layer were common microscopic findings irrespective of clinical morphology. Erythematous to purpuric patches were mainly composed of small-sized tumor cells, whereas medium- to large-tumor cells were predominant in lesions of other clinical morphologies. The density of tumor cell infiltration was significantly higher in cellulitis or abscess-like lesions or nodular lesions compared to erythematous to purpuric patches. A panniculitis-like pattern and angiocentricity were less common in patch lesions than in cellulitis-like swelling and nodular lesions. There is a histopathologic spectrum of cutaneous extranodal NK/T-cell lymphoma that is dependent on the clinical morphology.
    No preview · Article · Dec 2015 · Journal of Cutaneous Pathology
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: CD99 signaling is crucial to a diverse range of biological functions including survival and proliferation. CD99 engagement is reported to augment activator protein-1 (AP-1) activity through mitogen-activated protein (MAP) kinase pathways in a T-lymphoblastic lymphoma cell line Jurkat and in breast cancer cell lines. In this study, we report that CD99 differentially regulated AP-1 activity in the human myeloma cell line RPMI8226. CD99 was highly expressed and the CD99 engagement led to activation of the MAP kinases, but suppressed AP-1 activity by inducing the expression of basic leucine zipper transcription factor, ATF-like (BATF), a negative regulator of AP-1 in RPMI8226 cells. By contrast, engagement of CD99 enhanced AP-1 activity and did not change the BATF expression in Jurkat cells. CD99 engagement reduced the proliferation of RPMI8226 cells and expression of cyclin 1 and 3. Overall, these results suggest novel CD99 functions in RPMI8226 cells.
    Preview · Article · Nov 2015 · Immune Network
  • [Show abstract] [Hide abstract]
    ABSTRACT: Migration of plasma cells (PCs) is crucial for the control of PC survival and antibody production and is controlled by chemokines, most importantly by CXCL12. This study investigated the role of CD99 in CXCL12-induced PC migration. Among B cell subsets in the tonsils, CD99 expression was highest in PCs. CD99 expression increased during in vitro differentiation of germinal center B cells and was highest in PCs. CD99 engagement reduced chemotactic migration of PCs toward CXCL12 and reduced extracellular signal-regulated kinase (ERK) activation by CXCL12. An ERK inhibitor reduced CXCL12-mediated chemotactic migration, which suggests that ERK has a critical role in migration. CD99 engagement did not influence apoptosis, differentiation, or antibody secretion of PCs. We propose a novel role of CD99 in PCs that suppresses ERK activation and chemotactic migration of these cells.
    No preview · Article · Nov 2015 · Immunology letters
  • Source
    Jin Roh · So-Woon Kim · Chan-Sik Park

    Preview · Article · Aug 2015
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Diffuse large B-cell lymphoma (DLBCL) can be separated into 2 groups: nodal and extranodal disease. The aim of this study was to analyse the clinical features of skin lesions and survival outcomes of cutaneous DLBCL according to the primary tumour site. A total of 44 patients with cutaneous DLBCL were classified as primary cutaneous DLBCL, leg type or cutaneous DLBCL secondary to primary disease. Although skin lesion characteristics did not differ significantly between groups, extensive cutaneous lesions were more often observed in secondary cutaneous DLBCL compared with DLBCL, leg type. Secondary cutaneous DLBCL was more commonly associated with an advanced stage and higher International Prognostic Index score than DLBCL, leg type. DLBCL, leg type demonstrated a better survival outcome than secondary cutaneous DLBCL. The multiplicity of skin lesions and time-point of cutaneous involvement were associated with prognosis in secondary cutaneous DLBCL. Survival outcomes and prognostic factors differ depending on the primary tumour site of cutaneous DLBCL.
    Preview · Article · May 2015 · Acta Dermato-Venereologica
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Migration of plasma cells to the bone marrow is critical factor to humoral immunity and controlled by chemokines. Regulator of G protein signaling 1 (RGS1) is a GTPase-activating protein that controls various crucial functions such as migration. Here, we show that RGS1 controls the chemotactic migration of RPMI 8226 human plasmacytoma cells and human plasmablasts. LPS strongly increased RGS1 expression and retarded the migration of RPMI 8226 cells by suppressing CXCL12-mediated AKT activation. RGS1 knockdown by siRNA abolished the retardation of migration and AKT suppression by LPS. RGS1-dependent regulation of migration via AKT is also observed in cultured plasmablasts. We propose novel functions of RGS1 that suppress AKT activation and the migration of RPMI 8226 cells and plasmablasts in CXCL12-mediated chemotaxis.
    Preview · Article · Apr 2015 · PLoS ONE
  • [Show abstract] [Hide abstract]
    ABSTRACT: Autophagy is crucial for the survival and function of plasma cells including protection from toxic misfolded immunoglobulin and proper energy metabolism. Multiple myeloma (MM) is an indolent but eventually fatal neoplasm of plasma cells. Autophagy may play a critical role in the survival of MM cells and their response to chemotherapeutic agents. In this study, we correlated the expression of autophagy-related proteins with the prognosis of MM. In this retrospective cohort study, we examined the expression of the autophagic markers BECLIN 1 and microtubule-associated protein light chain 3 (LC3) in 89 cases of MM biopsied from 2001 to 2004 at the Asan Medical Center. The association of the expression scores of these markers with clinical outcomes was assessed. Patients with strong immunoreactivity to BECLIN 1 or LC3 had a significantly better overall survival (OS) than patients with negative to moderate immunoreactivity (p = 0.036 and 0.018, respectively). This was also true for disease-specific survival (DSS; p = 0.051 and 0.043, respectively). In addition, LC3 immunostaining remained an independent factor impacting OS (p = 0.028) and DSS (p = 0.020) after multivariate analysis. The results of this study suggest that higher immunoreactivity for autophagic markers in MM is associated with superior patient survival. © 2015 S. Karger AG, Basel.
    No preview · Article · Apr 2015 · Acta Haematologica
  • [Show abstract] [Hide abstract]
    ABSTRACT: Abstract This study evaluated the effect of age and cell of origin on the prognostic significance of Ki-67 labelling index (Ki-67 LI) on overall survival (OS) of diffuse large B-cell lymphoma (DLBCL) in a cohort of 697 patients treated with rituximab plus CHOP (R-CHOP). Multivariate analysis revealed no prognostic significance of high Ki-67 LI (≥ 85%) for OS. However, on subgroup analysis, high Ki-67 LI was significantly associated with poor OS in late-elderly (aged ≥ 70 years) (P = 0.021) and non-germinal center B-cell-like (GCB) subtype (P = 0.015). In particular, high Ki-67 LI was associated with poor prognosis in late-elderly non-GCB patients. No correlation was observed in young adults (aged < 60 years) or early-elderly (aged 60-70 years) or GCB patients. Present study shows that high Ki-67 LI is a risk factor of poor OS in late-elderly age group and non-GCB subtype in DLBCL patients treated with R-CHOP.
    No preview · Article · Jan 2015 · Leukemia and Lymphoma
  • Source

    Preview · Article · Jan 2015 · Annals of Laboratory Medicine
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Multicentric Castleman's disease (CD) is commonly associated with poor prognosis, and well-known prognostic factors are scarce. We performed a retrospective analysis to define the clinical features and prognostic factors for patients with multicentric CD. Between 1990 and 2013, 32 patients with multicentric CD were identified from the database of the Asan Medical Center, Seoul, Korea. Clinicopathologic data were collected by reviewing the medical records. With the exclusion of 4 patients because of unknown human immunodeficiency virus infection status, 28 human immunodeficiency virus-negative patients with multicentric CD were included in this analysis. Most of the patients were male (76%) and had a median age of 54 years. Hyaline vascular variant was the most common subtype (N=11, 39%). Hepatosplenomegaly (61%), fever (39%), edema (29%), and ascites (18%) were the most frequently reported symptoms and signs at diagnosis. With a median follow-up of 67 months, the 5-year overall survival (OS) was 77%. Patients with extravascular fluid accumulation (i.e., peripheral edema, ascites, and/or pleural effusions) were significantly associated with a poor survival rate (5-year OS, 94% vs. 56%; P=0.04). The extent of disease involvement was also a significant prognostic factor (5-year OS, 91% for involvement on a single side vs. 73% on both sides of the diaphragm; P=0.03). Other clinicopathologic factors were not significantly associated with patient survival. Our findings suggest that the hyaline vascular variant is not a rare subtype of multicentric CD. Extravascular fluid accumulation and disseminated disease involvement seem to be significant prognostic factors.
    Full-text · Article · Dec 2014 · Blood Research
  • Source
    Jin Roh · Min Jeong Song · Mi Woo Lee · Chan-Sik Park

    Preview · Article · Oct 2014 · The Korean Journal of Pathology
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Here we report a case of a 76-year-old man with diffuse large B-cell lymphoma (DLBCL) with simultaneous involvement of the right breast and left testicle. The patient underwent complete resection of the involved testis, followed by immunochemotherapy with rituximab, cyclophosphamide, doxorubicin, vincristine, and prednisolone (R-CHOP) and prophylactic radiotherapy to the contralateral testis. Following this multimodal therapy, he achieved a complete response. This is a rare case of DLBCL involving both the breast and the testis in a male patient.
    Preview · Article · Sep 2014 · Cancer Research and Treatment
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Background Primary testicular diffuse large B-cell lymphoma (DLBCL) is a rare but aggressive extranodal lymphoma, and its relapse in the central nervous system (CNS) is a major concern during treatment. Despite this, the role of intrathecal prophylaxis in primary testicular DLBCL remains controversial. Methods We retrospectively reviewed the medical records of 14 patients with primary testicular DLBCL diagnosed between November 2000 and June 2012, and analyzed the CNS relapse rate in patients treated without intrathecal prophylaxis. Survival curves were estimated using the Kaplan-Meier method. Results The median age at diagnosis was 57 years (range, 41-79 years). Unilateral testicular involvement was observed in 13 patients. Nine patients had stage I, 1 had stage II, and 4 had stage IV disease. The international prognostic index was low or low-intermediate risk in 12 patients and high-intermediate risk in 2 patients. Thirteen patients underwent orchiectomy. All the patients received systemic chemotherapy without intrathecal prophylaxis, and prophylactic radiotherapy was administered to the contralateral testis in 12 patients. The median follow-up period of surviving patients was 39 months (range, 10-139 months). Median overall survival was not reached and the median progression-free survival was 3.8 years. Four patients experienced relapse, but CNS relapse was observed in only one patient (7.1%) with stage IV disease, 27 months after a complete response. Conclusion Even without intrathecal prophylaxis, the rate of relapse in the CNS was lower in the Korean patients with primary testicular DLBCL compared to prior reports.
    Full-text · Article · Sep 2014 · Blood Research
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Background Abbreviated chemotherapy followed by radiotherapy or full cycles of chemotherapy is recommended as a standard treatment for limited-stage (LS) diffuse large B-cell lymphoma (DLBCL). After complete resection of tumors, however, Burkitt and childhood B-cell Non-Hodgkin lymphoma show favorable outcomes, even after abbreviated chemotherapy of only 2 or 3 cycles. We investigated the effectiveness of abbreviated chemotherapy in patients with LS DLBCL after complete tumor resection. Methods We retrospectively reviewed 18 patients with LS DLBCL who underwent complete tumor resection followed by either 3 or 4 cycles of chemotherapy between March 2002 and May 2010. Results With a median follow-up period of 57.9 months (range, 31.8-130.2 months), no patients experienced disease relapse or progression; however, 1 patient experienced secondary acute myeloid leukemia during follow-up. The 5-year progression-free survival rate and overall survival rate were 93.3% and 94.1%, respectively. Conclusion These results warrant further investigation into abbreviated chemotherapy as an alternative treatment for patients who have undergone complete resection of LS DLBCL.
    Preview · Article · Jun 2014 · Blood Research
  • [Show abstract] [Hide abstract]
    ABSTRACT: Background Differences in survival outcomes and prognostic factors of cutaneous extranodal natural killer/T-cell lymphoma (ENKTL) depending on primary tumor site are currently unknown. Objective We sought to analyze the clinicopathological features and survival outcomes of cutaneous ENKTL according to primary tumor site. Methods In all, 45 patients with cutaneous ENKTL were classified with: (1) primary cutaneous ENKTL, or (2) nasal ENKTL with cutaneous involvement. Clinicopathologic features, survival outcomes, and prognostic factors were analyzed using patient's medical records. Survival outcomes were analyzed using the Kaplan-Meier method and compared using the log rank test. The Student t test, Fisher exact test, and linear by linear association test were used to analyze clinicopathologic differences between groups. Results Clinical manifestations of cutaneous ENKTL included solitary or multiple subcutaneous nodules and cellulitis or abscess-like lesions. Primary cutaneous ENKTL demonstrated a less aggressive clinical course and better survival outcomes. The extent of cutaneous lesions demonstrated a significant effect on the prognosis of primary cutaneous ENKTL, but not on nasal ENKTL with cutaneous involvement. The presence of nasal lesions in primary cutaneous ENKTL was associated with poor prognosis. Limitations This study used a retrospective design and included a small sample size. Conclusion Although the clinicopathological features were similar regardless of subgroup, survival outcomes and prognostic factors differed depending on the primary tumor site of cutaneous ENKTL.
    No preview · Article · Jun 2014 · Journal of the American Academy of Dermatology
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Background Multiple myeloma (MM) is a heterogeneous and ultimately fatal disease. Risk stratification using prognostic biomarkers is crucial to individualize treatments. We sought to investigate the role of CD99, a transmembrane protein highly expressed in many hematopoietic cells including subpopulations of normal and neoplastic plasma cells, for MM risk stratification. Methods CD99 expression was measured in paraffin samples of bone marrow and extramedullary biopsies of 170 patients with MM. Patients were divided into those with high score (moderately and strongly positive) and low score (negative and weakly positive), with all staining being cytoplasmic and/or membranous. Results High anti-CD99 immunostaining was observed in 72 of 136 (52.9%) bone marrow biopsies and 24 of 87 (27.6%) extramedullary biopsies in MM. High CD99 expression of extramedullary specimens was associated with significantly longer overall survival (OS; p=.016). High CD99 expression of extramedullary specimens was also associated with better prognosis in the nonautologous stem cell transplantation group of MM patients (p=.044). In multivariate analysis, International Staging System stage was an independent prognostic factor, whereas CD99 expression was no longer statistically significant. Conclusions Expression of CD99 in extramedullary specimens was correlated with longer OS, suggesting that CD99 may be a helpful immunohistochemical marker for risk stratification.
    Preview · Article · Jun 2014 · The Korean Journal of Pathology
  • [Show abstract] [Hide abstract]
    ABSTRACT: Context.-The ability of intermediate trophoblasts to invade maternal tissue during placentation depends on how well they can degrade the extracellular matrix. Invasion into the extracellular matrix requires many complex proteases. A disintegrin and metalloproteinase with thrombospondin motifs (ADAMTS) is a novel family of secreted metalloproteinases. The ADAMTS-1, -4, -5, and -14 subtypes are known to be expressed in human placenta, but little is understood about their expression patterns. Objective.-To examine the expression patterns of ADAMTS-1, -4, -5, and -14 in specific human placenta cell types during gestation and in gestational trophoblastic diseases. Design.-Placental tissues were obtained from 25 pregnant women and 21 cases of gestational trophoblastic diseases (10 early complete moles, 3 placental site trophoblastic tumors, 4 invasive moles, and 4 choriocarcinomas). The expression of the 4 ADAMTS was analyzed by immunohistochemistry. Results.-ADAMTS-1, -4, -5, and -14 were differentially expressed by the human placenta throughout gestation in a time-specific and cell type-specific manner, as well as in gestational trophoblastic diseases. ADAMTS-1 showed gradually strong staining intensity in gestational trophoblastic diseases according to the invasive potential but showed consistent strong intensity throughout normal placenta. ADAMTS-4 and ADAMTS-5 exhibited higher and restricted expression in first-trimester intermediate trophoblasts. They also exhibited comparably strong expression in gestational trophoblastic diseases. However, ADAMTS-14 expression remained unchanged throughout gestation. Conclusions.-The restricted expression pattern of ADAMTS-4 and ADAMTS-5 and their increased expression in gestational trophoblastic diseases suggest that these 2 ADAMTS subtypes are associated with a biological phenotype of trophoblasts involved in human placentation and the development of gestational trophoblastic diseases.
    No preview · Article · May 2014 · Archives of pathology & laboratory medicine
  • [Show abstract] [Hide abstract]
    ABSTRACT: Diffuse large B-cell lymphoma (DLBCL) is classified into prognostically distinct germinal center B-cell (GCB) and activated B-cell subtypes by gene expression profiling (GEP). Recent reports suggest the role of GEP subtypes in targeted therapy. Immunohistochemistry (IHC) algorithms have been proposed as surrogates of GEP, but their utility remains controversial. Using microarray, we examined the concordance of 4 GEP-correlated and 2 non-GEP-correlated IHC algorithms in 381 DLBCLs, not otherwise specified. Subtypes and variants of DLBCL were excluded to minimize the possible confounding effect on prognosis and phenotype. Survival was analyzed in 138 cyclophosphamide, adriamycin, vincristine, and prednisone (CHOP)-treated and 147 rituximab plus CHOP (R-CHOP)-treated patients. Of the GEP-correlated algorithms, high concordance was observed among Hans, Choi, and Visco-Young algorithms (total concordance, 87.1%; κ score: 0.726 to 0.889), whereas Tally algorithm exhibited slightly lower concordance (total concordance 77.4%; κ score: 0.502 to 0.643). Two non-GEP-correlated algorithms (Muris and Nyman) exhibited poor concordance. Compared with the Western data, incidence of the non-GCB subtype was higher in all algorithms. Univariate analysis showed prognostic significance for Hans, Choi, and Visco-Young algorithms and BCL6, GCET1, LMO2, and BCL2 in CHOP-treated patients. On multivariate analysis, Hans algorithm retained its prognostic significance. By contrast, neither the algorithms nor individual antigens predicted survival in R-CHOP treatment. The high concordance among GEP-correlated algorithms suggests their usefulness as reliable discriminators of molecular subtype in DLBCL, not otherwise specified. Our study also indicates that prognostic significance of IHC algorithms may be limited in R-CHOP-treated Asian patients because of the predominance of the non-GCB type.
    No preview · Article · Apr 2014 · The American journal of surgical pathology
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Background Previously, cutaneous lymphomas were classified according to either the European Organization for the Research and Treatment of Cancer (EORTC) or the World Health Organization (WHO) classification paradigms. The aim of this study was to determine the relative frequency of Korean cutaneous lymphoma according to the new WHO-EORTC classification system. Methods A total of 517 patients were recruited during a recent 5 year-period (2006-2010) from 21 institutes and classified according to the WHO-EORTC criteria. Results The patients included 298 males and 219 females, and the mean age at diagnosis was 49 years. The lesions preferentially affected the trunk area (40.2%). The most frequent subtypes in order of decreasing prevalence were mycosis fungoides (22.2%), peripheral T-cell lymphoma (17.2%), CD30+ T-cell lymphoproliferative disorder (13.7%), and extranodal natural killer/T (NK/T) cell lymphoma, nasal type (12.0%). Diffuse large B-cell lymphoma accounted for 11.2% of cases, half of which were secondary cutaneous involvement; other types of B-cell lymphoma accounted for less than 1% of cases. Conclusions In comparison with data from Western countries, this study revealed relatively lower rates of mycosis fungoides and B-cell lymphoma in Korean patients, as well as higher rates of subcutaneous panniculitis-like T-cell lymphoma and NK/T cell lymphoma.
    Full-text · Article · Apr 2014 · The Korean Journal of Pathology

Publication Stats

457 Citations
162.29 Total Impact Points

Institutions

  • 2008-2015
    • University of Ulsan
      • • Department of Internal Medicine
      • • Department of Pathology
      Ulsan, Ulsan, South Korea
  • 2008-2014
    • Ulsan University Hospital
      Urusan, Ulsan, South Korea
  • 2007-2014
    • Asan Medical Center
      • Department of Pathology
      Sŏul, Seoul, South Korea
  • 2009
    • Seoul National University Hospital
      • Department of Ophthalmology
      Sŏul, Seoul, South Korea