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  1. Article ; Online: Upregulation of Myc promotes the evasion of NK cell‑mediated immunity through suppression of NKG2D ligands in K562 cells.

    Lee, Young-Shin / Heo, Woong / Son, Cheol-Hun / Kang, Chi-Dug / Park, You-Soo / Bae, Jaeho

    Molecular medicine reports

    2019  Volume 20, Issue 4, Page(s) 3301–3307

    Abstract: c‑Myc is a characteristic oncogene with dual functions in cell proliferation and apoptosis. Since the overexpression of the c‑Myc proto‑oncogene is a common event in the development and growth of various human types of cancer, the present study ... ...

    Abstract c‑Myc is a characteristic oncogene with dual functions in cell proliferation and apoptosis. Since the overexpression of the c‑Myc proto‑oncogene is a common event in the development and growth of various human types of cancer, the present study investigated whether oncogenic c‑Myc can alter natural killer (NK) cell‑mediated immunity through the expression of associated genes, using PCR, western blotting and flow cytometry assays. Furthermore, whether c‑Myc could influence the expression levels of natural killer group 2 member D (NKG2D) ligands, which are well known NK activation molecules, as well as NK cell‑mediated immunity, was investigated. c‑Myc was inhibited by 10058‑F4 treatment and small interfering RNA transfection. Upregulation of c‑Myc was achieved by transfection with a pCMV6‑myc vector. The inhibition of c‑Myc increased MHC class I polyeptide‑related sequence B and UL16 binding protein 1 expressions among NKG2D ligands, and the overexpression of c‑Myc suppressed the expression of all NKG2D ligands, except MHC class I polyeptide‑related sequence A. Furthermore, the alteration of c‑Myc activity altered the susceptibility of K562 cells to NK cells. These results suggested that the overexpression of c‑Myc may contribute to the immune escape of cancer cells and cell proliferation. Combined treatment with NK‑based cancer immunotherapy and inhibition of c‑Myc may achieve improved therapeutic results.
    MeSH term(s) Gene Expression Regulation, Leukemic/immunology ; Humans ; Immunity, Cellular ; K562 Cells ; Killer Cells, Natural/immunology ; Killer Cells, Natural/pathology ; NK Cell Lectin-Like Receptor Subfamily K/immunology ; Proto-Oncogene Proteins c-myc/immunology ; Tumor Escape ; Up-Regulation/immunology
    Chemical Substances KLRK1 protein, human ; MYC protein, human ; NK Cell Lectin-Like Receptor Subfamily K ; Proto-Oncogene Proteins c-myc
    Language English
    Publishing date 2019-08-09
    Publishing country Greece
    Document type Journal Article
    ISSN 1791-3004
    ISSN (online) 1791-3004
    DOI 10.3892/mmr.2019.10583
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Enhancement of antitumor immunity by combination of anti-CTLA-4 antibody and radioimmunotherapy through the suppression of Tregs.

    Son, Cheol-Hun / Bae, Jaeho / Lee, Hong-Rae / Yang, Kwangmo / Park, You-Soo

    Oncology letters

    2017  Volume 13, Issue 5, Page(s) 3781–3786

    Abstract: Cytotoxic T lymphocyte antigen-4 (CTLA-4) is expressed during cluster of differentiation (CD)4+ T-cell activation and terminates immune responses by interrupting CD28-enhanced activation. In addition, CTLA-4 is known to be constitutively expressed in ... ...

    Abstract Cytotoxic T lymphocyte antigen-4 (CTLA-4) is expressed during cluster of differentiation (CD)4+ T-cell activation and terminates immune responses by interrupting CD28-enhanced activation. In addition, CTLA-4 is known to be constitutively expressed in regulatory T-cells (Tregs) and to contribute to immune suppression by enhancing the suppressive function of Tregs. However, the molecular mechanisms underlying CTLA-4-mediated Treg suppression remains incompletely understood. Furthermore, it is uncertain whether the
    Language English
    Publishing date 2017-03-28
    Publishing country Greece
    Document type Journal Article
    ZDB-ID 2573196-8
    ISSN 1792-1082 ; 1792-1074
    ISSN (online) 1792-1082
    ISSN 1792-1074
    DOI 10.3892/ol.2017.5933
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Combination Treatment of Stereotactic Body Radiation Therapy and Immature Dendritic Cell Vaccination for Augmentation of Local and Systemic Effects.

    Choi, Chul Won / Jeong, Min Ho / Park, You-Soo / Son, Cheol-Hun / Lee, Hong-Rae / Koh, Eun-Kyoung

    Cancer research and treatment

    2018  Volume 51, Issue 2, Page(s) 464–473

    Abstract: Purpose: The purpose of this study was to investigate the efficacy of stereotactic body radiation therapy (SBRT) as a tumor-associated antigen (TAA) presentation method for dendritic cell (DC) sensitization and evaluate its effect in combination with ... ...

    Abstract Purpose: The purpose of this study was to investigate the efficacy of stereotactic body radiation therapy (SBRT) as a tumor-associated antigen (TAA) presentation method for dendritic cell (DC) sensitization and evaluate its effect in combination with immunotherapy using an intratumoral injection of immature DCs (iDCs).
    Methods and materials: CT-26 colon carcinoma cell was used as a cancer cell line. Annexin V staining and phagocytosis assays were performed to determine the appropriate radiation dose and incubation time to generate TAAs. BALB/c mice were used for in vivo experiments. Cancer cells were injected into the right legs and left flanks to generate primary and metastatic tumors, respectively. The mice were subjected to radiation therapy (RT) alone, intradermal injection of electroporated DCs alone, or RT in combination with iDC intratumoral injection (RT/iDC). Tumor growth measurement and survival rate analysis were performed. Enzyme-linked immunospot and cytotoxicity assays were performed to observe the effect of different treatments on the immune system.
    Results: Annexin V staining and phagocytosis assays showed that 15 Gy radiation dose and 48 hours of incubation was appropriate for subsequent experiments. Maximum DC sensitization and T-cell stimulation was observed with RT as compared to other TAA preparation methods. In vivo assays revealed statistically significant delay in the growth of both primary and metastatic tumors in the RT/iDC group. The overall survival rate was the highest in the RT/iDC group.
    Conclusion: The combination of SBRT and iDC vaccination may enhance treatment effects. Clinical trials and further studies are warranted in the future.
    MeSH term(s) Animals ; Antigen Presentation/immunology ; Antigen-Presenting Cells/immunology ; Antigen-Presenting Cells/metabolism ; Cancer Vaccines/administration & dosage ; Cancer Vaccines/immunology ; Cell Line, Tumor ; Combined Modality Therapy ; Cytokines/metabolism ; Dendritic Cells/immunology ; Dendritic Cells/metabolism ; Disease Models, Animal ; Humans ; Immunotherapy ; Kaplan-Meier Estimate ; Mice ; Neoplasms/immunology ; Neoplasms/mortality ; Neoplasms/pathology ; Neoplasms/therapy ; Radiosurgery/methods ; Tumor Burden
    Chemical Substances Cancer Vaccines ; Cytokines
    Language English
    Publishing date 2018-06-06
    Publishing country Korea (South)
    Document type Journal Article
    ZDB-ID 2133613-1
    ISSN 2005-9256 ; 1598-2998
    ISSN (online) 2005-9256
    ISSN 1598-2998
    DOI 10.4143/crt.2018.186
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Expansion of cytotoxic natural killer cells using irradiated autologous peripheral blood mononuclear cells and anti-CD16 antibody

    Hong-Rae Lee / Cheol-Hun Son / Eun-Kyoung Koh / Jae-Ho Bae / Chi-Dug Kang / Kwangmo Yang / You-Soo Park

    Scientific Reports, Vol 7, Iss 1, Pp 1-

    2017  Volume 13

    Abstract: Abstract Natural killer (NK) cells are considered a promising strategy for cancer treatment. Various methods for large-scale NK cell expansion have been developed, but they should guarantee that no viable cells are mixed with the expanded NK cells ... ...

    Abstract Abstract Natural killer (NK) cells are considered a promising strategy for cancer treatment. Various methods for large-scale NK cell expansion have been developed, but they should guarantee that no viable cells are mixed with the expanded NK cells because most methods involve cancer cells or genetically modified cells as feeder cells. We used an anti-CD16 monoclonal antibody (mAb) and irradiated autologous peripheral blood mononuclear cells (PBMCs) (IrAPs) to provide a suitable environment (activating receptor-ligand interactions) for the NK cell expansion. This method more potently expanded NK cells, and the final product was composed of highly purified NK cells with lesser T-cell contamination. The expanded NK cells showed greater upregulation of various activation receptors, CD107a, and secreted larger amounts of interferon gamma. IrAPs expressed NKG2D ligands and CD48, and coengagement of CD16 with NKG2D and 2B4 caused potent NK cell activation and proliferation. The expanded NK cells were cytotoxic toward various cancer cells in vitro and in vivo. Moreover, irradiation or a chemotherapeutic drug further enhanced this antitumor effect. Therefore, we developed an effective in vitro culture method for large-scale expansion of highly purified cytotoxic NK cells with potent antitumor activity using IrAPs instead of cancer cell-based feeder cells.
    Keywords Medicine ; R ; Science ; Q
    Subject code 610
    Language English
    Publishing date 2017-09-01T00:00:00Z
    Publisher Nature Publishing Group
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  5. Article ; Online: Functional Characterization of an

    Son, Hyosuk / Jung, Young Jun / Park, Seong-Cheol / Kim, Il Ryong / Park, Joung Hun / Jang, Mi-Kyeong / Lee, Jung Ro

    Molecules (Basel, Switzerland)

    2022  Volume 27, Issue 18

    Abstract: Profilins (PFNs) are actin monomer-binding proteins that function as antimicrobial agents in plant phloem sap. Although the roles ... ...

    Abstract Profilins (PFNs) are actin monomer-binding proteins that function as antimicrobial agents in plant phloem sap. Although the roles of
    MeSH term(s) Actins/metabolism ; Antifungal Agents/metabolism ; Arabidopsis/metabolism ; Heat-Shock Response ; Microfilament Proteins/metabolism ; Molecular Chaperones/metabolism ; Plants/metabolism ; Profilins/genetics
    Chemical Substances Actins ; Antifungal Agents ; Microfilament Proteins ; Molecular Chaperones ; Profilins
    Language English
    Publishing date 2022-09-06
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 1413402-0
    ISSN 1420-3049 ; 1431-5165 ; 1420-3049
    ISSN (online) 1420-3049
    ISSN 1431-5165 ; 1420-3049
    DOI 10.3390/molecules27185771
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Amidoxime-Containing Zr and Hf Atomic Layer Deposition Precursors for Metal Oxide Thin Films.

    Lee, Ga Yeon / Lee, Seung-Hun / Jo, In Ho / Cho, Chan-Mi / Shostak, Svetlana / Ryu, Ji Yeon / Park, Bo Keun / Son, Seung Uk / Choi, Cheol Ho / Eom, Taeyong / Kim, Jeong Hwan / Chung, Taek-Mo

    Inorganic chemistry

    2023  Volume 63, Issue 1, Page(s) 537–547

    Abstract: In this article, we discuss the synthesis of eight novel zirconium and hafnium complexes containing amidoxime ligands as potential precursors for atomic layer deposition (ALD). Two amidoximes, ...

    Abstract In this article, we discuss the synthesis of eight novel zirconium and hafnium complexes containing amidoxime ligands as potential precursors for atomic layer deposition (ALD). Two amidoximes,
    Language English
    Publishing date 2023-12-18
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1484438-2
    ISSN 1520-510X ; 0020-1669
    ISSN (online) 1520-510X
    ISSN 0020-1669
    DOI 10.1021/acs.inorgchem.3c03455
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Expansion of cytotoxic natural killer cells using irradiated autologous peripheral blood mononuclear cells and anti-CD16 antibody.

    Lee, Hong-Rae / Son, Cheol-Hun / Koh, Eun-Kyoung / Bae, Jae-Ho / Kang, Chi-Dug / Yang, Kwangmo / Park, You-Soo

    Scientific reports

    2017  Volume 7, Issue 1, Page(s) 11075

    Abstract: Natural killer (NK) cells are considered a promising strategy for cancer treatment. Various methods for large-scale NK cell expansion have been developed, but they should guarantee that no viable cells are mixed with the expanded NK cells because most ... ...

    Abstract Natural killer (NK) cells are considered a promising strategy for cancer treatment. Various methods for large-scale NK cell expansion have been developed, but they should guarantee that no viable cells are mixed with the expanded NK cells because most methods involve cancer cells or genetically modified cells as feeder cells. We used an anti-CD16 monoclonal antibody (mAb) and irradiated autologous peripheral blood mononuclear cells (PBMCs) (IrAPs) to provide a suitable environment (activating receptor-ligand interactions) for the NK cell expansion. This method more potently expanded NK cells, and the final product was composed of highly purified NK cells with lesser T-cell contamination. The expanded NK cells showed greater upregulation of various activation receptors, CD107a, and secreted larger amounts of interferon gamma. IrAPs expressed NKG2D ligands and CD48, and coengagement of CD16 with NKG2D and 2B4 caused potent NK cell activation and proliferation. The expanded NK cells were cytotoxic toward various cancer cells in vitro and in vivo. Moreover, irradiation or a chemotherapeutic drug further enhanced this antitumor effect. Therefore, we developed an effective in vitro culture method for large-scale expansion of highly purified cytotoxic NK cells with potent antitumor activity using IrAPs instead of cancer cell-based feeder cells.
    MeSH term(s) Animals ; Antibodies, Monoclonal/pharmacology ; Biomarkers ; CD48 Antigen/metabolism ; Cell Degranulation/drug effects ; Cell Degranulation/immunology ; Cell Degranulation/radiation effects ; Cell Line, Tumor ; Cytokines/biosynthesis ; Cytotoxicity, Immunologic ; Flow Cytometry ; Heterografts ; Humans ; Killer Cells, Natural/immunology ; Killer Cells, Natural/metabolism ; Leukocytes, Mononuclear/drug effects ; Leukocytes, Mononuclear/immunology ; Leukocytes, Mononuclear/metabolism ; Leukocytes, Mononuclear/radiation effects ; Lymphocyte Activation/drug effects ; Lymphocyte Activation/immunology ; Lymphocyte Activation/radiation effects ; Lysosomal-Associated Membrane Protein 1/metabolism ; Mice ; Mice, Inbred NOD ; Mice, SCID ; NK Cell Lectin-Like Receptor Subfamily K/metabolism ; Protein Binding ; Receptors, IgG/antagonists & inhibitors
    Chemical Substances Antibodies, Monoclonal ; Biomarkers ; CD48 Antigen ; Cytokines ; KLRK1 protein, human ; Lysosomal-Associated Membrane Protein 1 ; NK Cell Lectin-Like Receptor Subfamily K ; Receptors, IgG
    Language English
    Publishing date 2017-09-11
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-017-09259-1
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Combination treatment with decitabine and ionizing radiation enhances tumor cells susceptibility of T cells.

    Son, Cheol-Hun / Lee, Hong-Rae / Koh, Eun-Kyoung / Shin, Dong-Yeok / Bae, Jae-Ho / Yang, Kwangmo / Park, You-Soo

    Scientific reports

    2016  Volume 6, Page(s) 32470

    Abstract: Decitabine has been found to have anti-metabolic and anti-tumor activities in various tumor cells. Recently, the use of decitabine in combination with other conventional therapies reportedly resulted in improved anti-tumor activity against various tumors. ...

    Abstract Decitabine has been found to have anti-metabolic and anti-tumor activities in various tumor cells. Recently, the use of decitabine in combination with other conventional therapies reportedly resulted in improved anti-tumor activity against various tumors. Ionizing radiation (IR) is widely used as a cancer treatment. Decitabine and IR improve immunogenicity and susceptibility of tumor cells to immune cells by up-regulating the expression of various molecules such as major histocompatibility complex (MHC) class I; natural-killer group 2, member D (NKG2D) ligands; and co-stimulatory molecules. However, the effects of combining decitabine and IR therapies are largely unknown. Our results indicate that decitabine or IR treatment upregulates MHC class I, along with various co-stimulatory molecules in target tumor cells. Furthermore, decitabine and IR combination treatment further upregulates MHC class I, along with the co-stimulatory molecules, when compared to the effect of each treatment alone. Importantly, decitabine treatment further enhanced T cell-mediated cytotoxicity and release of IFN- γ against target tumor cells which is induced by IR. Interestingly, decitabine did not affect NKG2D ligand expression or NK cell-mediated cytotoxicity in target tumor cells. These observations suggest that decitabine may be used as a useful immunomodulator to sensitize tumor cells in combination with other tumor therapies.
    Language English
    Publishing date 2016-09-27
    Publishing country England
    Document type Journal Article
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/srep32470
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Clinical guidelines for ovarian cancer: the Korean Society of Gynecologic Oncology guidelines.

    Lee, Banghyun / Chang, Suk-Joon / Kwon, Byung Su / Son, Joo-Hyuk / Lim, Myong Cheol / Kim, Yun Hwan / Lee, Shin-Wha / Choi, Chel Hun / Eoh, Kyung Jin / Lee, Jung-Yun / Suh, Dong Hoon / Kim, Yong Beom

    Journal of gynecologic oncology

    2023  Volume 35, Issue 1, Page(s) e43

    Abstract: Since the latest practice guidelines for ovarian cancer were developed by the Korean Society of Gynecologic Oncology (KSGO) in 2021, many studies have examined the efficacy and safety of various treatments for epithelial ovarian cancer (EOC). Therefore, ... ...

    Abstract Since the latest practice guidelines for ovarian cancer were developed by the Korean Society of Gynecologic Oncology (KSGO) in 2021, many studies have examined the efficacy and safety of various treatments for epithelial ovarian cancer (EOC). Therefore, the need to develop recommendations for EOC treatments has been raised. This study searched the literature using 4 key items and the Population, Intervention, Comparison, and Outcome: the efficacy and safety of poly-ADP ribose polymerase inhibitors in newly diagnosed advanced EOC; the efficacy and safety of intraperitoneal plus intravenous chemotherapy in optimally debulked advanced EOC; the efficacy and safety of secondary cytoreductive surgery in platinum-sensitive recurrent ovarian cancer; and the efficacy and safety of the addition of bevacizumab to platinum-based chemotherapy in first platinum-sensitive recurrent EOC patients who received prior bevacizumab. The evidence for these recommendations, according to each key question, was evaluated using a systematic review and meta-analysis. The committee of ovarian cancer of the KSGO developed updated guidelines for treatments of EOC.
    MeSH term(s) Female ; Humans ; Bevacizumab/adverse effects ; Carcinoma, Ovarian Epithelial/drug therapy ; Neoplasm Recurrence, Local/drug therapy ; Ovarian Neoplasms/drug therapy ; Republic of Korea
    Chemical Substances Bevacizumab (2S9ZZM9Q9V)
    Language English
    Publishing date 2023-12-27
    Publishing country Korea (South)
    Document type Meta-Analysis ; Systematic Review ; Journal Article
    ZDB-ID 2478405-9
    ISSN 2005-0399 ; 2005-0380
    ISSN (online) 2005-0399
    ISSN 2005-0380
    DOI 10.3802/jgo.2024.35.e43
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Combination effect of regulatory T-cell depletion and ionizing radiation in mouse models of lung and colon cancer.

    Son, Cheol-Hun / Bae, Jae-Ho / Shin, Dong-Yeok / Lee, Hong-Rae / Jo, Wol-Soon / Yang, Kwangmo / Park, You-Soo

    International journal of radiation oncology, biology, physics

    2015  Volume 92, Issue 2, Page(s) 390–398

    Abstract: Purpose: To investigate the potential of low-dose cyclophosphamide (LD-CTX) and anti-CD25 antibody to prevent activation of regulatory T cells (Tregs) during radiation therapy.: Methods and materials: We used LD-CTX and anti-CD25 monoclonal antibody ... ...

    Abstract Purpose: To investigate the potential of low-dose cyclophosphamide (LD-CTX) and anti-CD25 antibody to prevent activation of regulatory T cells (Tregs) during radiation therapy.
    Methods and materials: We used LD-CTX and anti-CD25 monoclonal antibody as a means to inhibit Tregs and improve the therapeutic effect of radiation in a mouse model of lung and colon cancer. Mice were irradiated on the tumor mass of the right leg and treated with LD-CTX and anti-CD25 antibody once per week for 3 weeks.
    Results: Combined treatment of LD-CTX or anti-CD25 antibody with radiation significantly decreased Tregs in the spleen and tumor compared with control and irradiation only in both lung and colon cancer. Combinatorial treatments resulted in a significant increase in the effector T cells, longer survival rate, and suppressed irradiated and distal nonirradiated tumor growth. Specifically, the combinatorial treatment of LD-CTX with radiation resulted in outstanding regression of local and distant tumors in colon cancer, and almost all mice in this group survived until the end of the study.
    Conclusions: Our results suggest that Treg depletion strategies may enhance radiation-mediated antitumor immunity and further improve outcomes after radiation therapy.
    MeSH term(s) Animals ; Antineoplastic Agents, Alkylating/administration & dosage ; Colonic Neoplasms/immunology ; Colonic Neoplasms/mortality ; Colonic Neoplasms/radiotherapy ; Combined Modality Therapy ; Cyclophosphamide/administration & dosage ; Immunosuppressive Agents/administration & dosage ; Interleukin-2 Receptor alpha Subunit/antagonists & inhibitors ; Lung Neoplasms/immunology ; Lung Neoplasms/mortality ; Lung Neoplasms/radiotherapy ; Male ; Mice ; Mice, Inbred BALB C ; T-Lymphocytes, Regulatory/drug effects ; T-Lymphocytes, Regulatory/radiation effects
    Chemical Substances Antineoplastic Agents, Alkylating ; Immunosuppressive Agents ; Interleukin-2 Receptor alpha Subunit ; Cyclophosphamide (8N3DW7272P)
    Language English
    Publishing date 2015-06-01
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 197614-x
    ISSN 1879-355X ; 0360-3016
    ISSN (online) 1879-355X
    ISSN 0360-3016
    DOI 10.1016/j.ijrobp.2015.01.011
    Database MEDical Literature Analysis and Retrieval System OnLINE

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