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  1. Article: Relapse of Graves' disease with repetitive depression and dysphagia episodes: A case report.

    Sakakura, Koichi

    Clinical case reports

    2022  Volume 10, Issue 11, Page(s) e6592

    Abstract: Graves' disease is a recurrent syndrome often accompanied by depression. I report a rare case in which dysphagia and bulbar myopathy indicated a relapse of Graves' disease, accompanied by recurrent depression. ...

    Abstract Graves' disease is a recurrent syndrome often accompanied by depression. I report a rare case in which dysphagia and bulbar myopathy indicated a relapse of Graves' disease, accompanied by recurrent depression.
    Language English
    Publishing date 2022-11-15
    Publishing country England
    Document type Case Reports
    ZDB-ID 2740234-4
    ISSN 2050-0904
    ISSN 2050-0904
    DOI 10.1002/ccr3.6592
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Immunological features of circulating monocyte subsets in patients with squamous cell carcinoma of the head and neck.

    Sakakura, Koichi / Takahashi, Hideyuki / Motegi, Sei-Ichiro / Yokobori-Kuwabara, Yuki / Oyama, Tetsunari / Chikamatsu, Kazuaki

    Clinical immunology (Orlando, Fla.)

    2021  Volume 225, Page(s) 108677

    Abstract: Background: Circulating monocytes are classified into three subsets according to their CD14 and CD16 expressions. Here we investigated all three subsets in patients with squamous cell carcinoma of the head and neck (SCCHN).: Methods: Peripheral blood ...

    Abstract Background: Circulating monocytes are classified into three subsets according to their CD14 and CD16 expressions. Here we investigated all three subsets in patients with squamous cell carcinoma of the head and neck (SCCHN).
    Methods: Peripheral blood from 54 patients with SCCHN and 24 healthy donors (HDs) was tested for flowcytometry. Immunohistochemical staining of the primary tumor was performed. SCCHN cells were co-cultured with human monocytes in vitro.
    Results: The level of intermediate monocytes was significantly lower in SCCHN than in HDs. The expression levels of HLA-G, PD-L1, and CD51 on intermediate monocytes was evidently greater in patients with SCCHN. In vitro co-culturing of SCCHN cells with monocytes revealed a significant increase in CD51 expression levels on monocytes. The decrease in expression levels of the maturation markers CX3CR1 and CD68 was significantly correlated to poor clinical outcomes.
    Conclusion: The level of intermediate monocytes was decreased in cancer patients in favor of immature and expressed immunosuppressive molecules.
    MeSH term(s) Adult ; Aged ; Aged, 80 and over ; B7-H1 Antigen/metabolism ; Blood Circulation ; Female ; Flow Cytometry ; HLA-G Antigens ; Head and Neck Neoplasms/immunology ; Humans ; Immunophenotyping ; Lipopolysaccharide Receptors/metabolism ; Male ; Middle Aged ; Monocytes/immunology ; Receptors, IgG/metabolism ; Squamous Cell Carcinoma of Head and Neck/immunology ; Up-Regulation
    Chemical Substances B7-H1 Antigen ; HLA-G Antigens ; Lipopolysaccharide Receptors ; Receptors, IgG
    Language English
    Publishing date 2021-01-19
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1459903-x
    ISSN 1521-7035 ; 1521-6616
    ISSN (online) 1521-7035
    ISSN 1521-6616
    DOI 10.1016/j.clim.2021.108677
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  3. Article ; Online: Two Different Tracts and Origin of Pyriform Sinus Fistula.

    Sakakura, Koichi / Yasuoka, Yoshihito / Shino, Masato / Toyoda, Minoru / Obi, Kisho / Chikamatsu, Kazuaki

    The Annals of otology, rhinology, and laryngology

    2020  Volume 130, Issue 6, Page(s) 629–635

    Abstract: Objective: Suppurative acute thyroiditis is caused by pyriform sinus fistula (PSF), and PSF frequently elicits deep neck abscess. However, complete fistulectomy is the ideal management of PSF, and studies on surgical findings of PSF are exceedingly rare. ...

    Abstract Objective: Suppurative acute thyroiditis is caused by pyriform sinus fistula (PSF), and PSF frequently elicits deep neck abscess. However, complete fistulectomy is the ideal management of PSF, and studies on surgical findings of PSF are exceedingly rare. This study aimed to reveal the origins of PSF, each route, and clinical presentation.
    Methods: This is a multicenter study. We have conducted 19 complete fistulectomies of PSF in Japan, analyzed routes of the fistulas, estimated the origins, and investigated their histological and clinical findings.
    Results: No recurrence was observed in all cases. Five of 12 cases showed thymic and/or parathyroid tissues around the fistulas, passing inside the inferior horn of thyroid cartilage, were regarded as having 3rd pouch origin, and tended to have low frequency of severe deep neck abscess. The remaining 7 cases originated from the 4th pouch running outside of the horn and showed frequent severe infection.
    Conclusion: PSF have 2 different routes depending on their generation and may present different clinical manifestations.
    MeSH term(s) Adolescent ; Adult ; Child ; Child, Preschool ; Coloring Agents ; Female ; Fistula/pathology ; Fistula/surgery ; Humans ; Infant ; Infant, Newborn ; Male ; Pharyngeal Diseases/pathology ; Pharyngeal Diseases/surgery ; Pyriform Sinus/pathology ; Pyriform Sinus/surgery ; Thymus Gland/pathology ; Thyroid Cartilage/pathology ; Thyroid Gland/pathology ; Young Adult
    Chemical Substances Coloring Agents
    Language English
    Publishing date 2020-10-21
    Publishing country United States
    Document type Journal Article ; Multicenter Study
    ZDB-ID 120642-4
    ISSN 1943-572X ; 0003-4894
    ISSN (online) 1943-572X
    ISSN 0003-4894
    DOI 10.1177/0003489420966348
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  4. Article ; Online: AKT3 is a key regulator of head and neck squamous cell carcinoma.

    Takahashi, Hideyuki / Rokudai, Susumu / Kawabata-Iwakawa, Reika / Sakakura, Koichi / Oyama, Tetsunari / Nishiyama, Masahiko / Chikamatsu, Kazuaki

    Cancer science

    2021  Volume 112, Issue 6, Page(s) 2325–2334

    Abstract: The phosphatidylinositol 3-kinase (PI3K)/AKT/mammalian target of rapamycin (mTOR) pathway plays a vital role in cell proliferation, apoptosis, metabolism, and angiogenesis in various human cancers, including head and neck squamous cell carcinoma (HNSCC). ...

    Abstract The phosphatidylinositol 3-kinase (PI3K)/AKT/mammalian target of rapamycin (mTOR) pathway plays a vital role in cell proliferation, apoptosis, metabolism, and angiogenesis in various human cancers, including head and neck squamous cell carcinoma (HNSCC). In the present study, we aimed to clarify the role of AKT, which is a major downstream effector of the PI3K-AKT-mTOR pathway, in HNSCC. We first investigated the mRNA expression of AKT isoforms using RNA-sequencing data from The Cancer Genome Atlas database. We observed a specific elevation of AKT3 expression in HNSCC tissues when compared with that in normal tissues. Furthermore, AKT3 expression correlated with genes related to the immunosuppressive microenvironment more than the other AKT isoforms and PIK3CA. Accordingly, we focused on AKT3 and performed a knockdown approach using an HNSCC cell line. AKT3 knockdown cells exhibited impaired proliferation, a shift in the cell cycle from G2/M to G1/G0 phase, an increase in apoptotic cells, and downregulation of gene expression related to immunosuppression, as well as the knockdown of its upstream regulator PIK3CA. We also performed immunohistochemistry for both AKT3 and PIK3CA using surgical specimens from 72 patients with HNSCC. AKT3 expression in tumor cells correlated with immune cell infiltration and unfavorable prognosis when compared with PIK3CA. These findings suggested that AKT3 expression is a potential biomarker for predicting the immunoreactivity and prognosis of HNSCC. Furthermore, the isoform-specific inhibition of AKT3 could be developed as a novel cancer therapy that efficiently suppresses the PI3K-AKT-mTOR pathway.
    MeSH term(s) Apoptosis ; Biomarkers, Tumor/genetics ; Biomarkers, Tumor/metabolism ; Cell Line, Tumor ; Cell Proliferation ; Class I Phosphatidylinositol 3-Kinases/genetics ; Class I Phosphatidylinositol 3-Kinases/metabolism ; Female ; Gene Expression Regulation, Neoplastic ; Head and Neck Neoplasms/genetics ; Head and Neck Neoplasms/metabolism ; Head and Neck Neoplasms/surgery ; High-Throughput Nucleotide Sequencing ; Humans ; Male ; Prognosis ; Proto-Oncogene Proteins c-akt/genetics ; Proto-Oncogene Proteins c-akt/metabolism ; Sequence Analysis, RNA/methods ; Squamous Cell Carcinoma of Head and Neck/genetics ; Squamous Cell Carcinoma of Head and Neck/metabolism ; Squamous Cell Carcinoma of Head and Neck/surgery ; Survival Analysis ; Tumor Microenvironment ; Up-Regulation
    Chemical Substances Biomarkers, Tumor ; Class I Phosphatidylinositol 3-Kinases (EC 2.7.1.137) ; PIK3CA protein, human (EC 2.7.1.137) ; AKT3 protein, human (EC 2.7.11.1) ; Proto-Oncogene Proteins c-akt (EC 2.7.11.1)
    Language English
    Publishing date 2021-05-01
    Publishing country England
    Document type Journal Article
    ZDB-ID 2115647-5
    ISSN 1349-7006 ; 1347-9032
    ISSN (online) 1349-7006
    ISSN 1347-9032
    DOI 10.1111/cas.14911
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  5. Article: AKT3 Is a Novel Regulator of Cancer-Associated Fibroblasts in Head and Neck Squamous Cell Carcinoma.

    Takahashi, Hideyuki / Rokudai, Susumu / Kawabata-Iwakawa, Reika / Sakakura, Koichi / Oyama, Tetsunari / Nishiyama, Masahiko / Chikamatsu, Kazuaki

    Cancers

    2021  Volume 13, Issue 6

    Abstract: Cancer-associated fibroblasts (CAFs) play vital roles in tumor progression by promoting epithelial-to-mesenchymal transition, angiogenesis, and immunosuppression. In the present study, we sought to identify the key regulators of the pro-tumoral functions ...

    Abstract Cancer-associated fibroblasts (CAFs) play vital roles in tumor progression by promoting epithelial-to-mesenchymal transition, angiogenesis, and immunosuppression. In the present study, we sought to identify the key regulators of the pro-tumoral functions of CAFs in head and neck squamous cell carcinoma (HNSCC). mRNA expression data obtained from The Cancer Genome Atlas revealed that CAF-specific mRNA expression correlated with genes that relate to an immunosuppressive microenvironment in a HNSCC cohort. RNA sequencing of CAFs and normal fibroblasts isolated from HNSCC specimens identified 1127 differentially expressed genes (DEGs) and several upregulated pathways in CAFs. Among the 1127 DEGs, we identified 13 immune function-related genes and focused on
    Language English
    Publishing date 2021-03-11
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2527080-1
    ISSN 2072-6694
    ISSN 2072-6694
    DOI 10.3390/cancers13061233
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  6. Article ; Online: Circulating naïve and effector memory T cells correlate with prognosis in head and neck squamous cell carcinoma.

    Takahashi, Hideyuki / Sakakura, Koichi / Ida, Shota / Kawabata-Iwakawa, Reika / Matsuyama, Toshiyuki / Tada, Hiroe / Mito, Ikko / Chikamatsu, Kazuaki

    Cancer science

    2021  Volume 113, Issue 1, Page(s) 53–64

    Abstract: T-cell memory is an important mechanism for long-term protection against diverse pathogens. Generation and persistence of memory T cells are vital components of anti-tumor immunity, given their ability to persist for prolonged durations, as well as ... ...

    Abstract T-cell memory is an important mechanism for long-term protection against diverse pathogens. Generation and persistence of memory T cells are vital components of anti-tumor immunity, given their ability to persist for prolonged durations, as well as activate and migrate rapidly. In the present study, we investigated the clinical and prognostic significance of T-cell subsets in the peripheral circulation of patients with head and neck squamous cell carcinoma (HNSCC). Moreover, we calculated the enrichment scores of T-cell subsets in primary tumor tissues and compared their clinical characteristics using a public database. Multivariate survival analyses of circulating T-cell parameters revealed that clinical parameters, except M factor, were not independent prognostic factors, whereas proportions of CD8
    MeSH term(s) Biomarkers, Tumor/metabolism ; CD8-Positive T-Lymphocytes/metabolism ; Gene Expression Profiling ; Gene Expression Regulation ; Head and Neck Neoplasms/immunology ; Head and Neck Neoplasms/pathology ; Head and Neck Neoplasms/virology ; High-Throughput Nucleotide Sequencing ; Humans ; Memory T Cells/metabolism ; Neoplasm Staging ; Papillomavirus Infections/genetics ; Papillomavirus Infections/immunology ; Papillomavirus Infections/pathology ; Prognosis ; Sequence Analysis, RNA ; Squamous Cell Carcinoma of Head and Neck/immunology ; Squamous Cell Carcinoma of Head and Neck/pathology ; Squamous Cell Carcinoma of Head and Neck/virology
    Chemical Substances Biomarkers, Tumor
    Language English
    Publishing date 2021-11-16
    Publishing country England
    Document type Journal Article
    ZDB-ID 2115647-5
    ISSN 1349-7006 ; 1347-9032
    ISSN (online) 1349-7006
    ISSN 1347-9032
    DOI 10.1111/cas.15195
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  7. Article ; Online: Prognostic significance and population dynamics of peripheral monocytes in patients with oropharyngeal squamous cell carcinoma.

    Takahashi, Hideyuki / Sakakura, Koichi / Tada, Hiroe / Kaira, Kyoichi / Oyama, Tetsunari / Chikamatsu, Kazuaki

    Head & neck

    2019  Volume 41, Issue 6, Page(s) 1880–1888

    Abstract: Background: Several inflammatory biomarkers are considered potential prognostic factors in various cancers. This study aimed to investigate the prognostic significance and population dynamics of pretreatment inflammatory biomarker levels in patients ... ...

    Abstract Background: Several inflammatory biomarkers are considered potential prognostic factors in various cancers. This study aimed to investigate the prognostic significance and population dynamics of pretreatment inflammatory biomarker levels in patients with oropharyngeal squamous cell carcinoma (OPSCC).
    Methods: The influence of neutrophil counts, lymphocyte counts, monocyte counts, platelet counts, lymphocyte-to-monocyte ratio (LMR), neutrophil-to-lymphocyte ratio, and platelet-to-lymphocyte ratio on progression-free survival (PFS), and overall survival (OS) was analyzed. We also analyzed the peripheral blood mononuclear cells collected from patients and healthy donors (HDs).
    Results: Elevated monocyte count was an independent prognostic factor for PFS. Low LMR was an independent prognostic factor for OS. The proportion of intermediate monocytes was lower, and that of classical monocytes was higher in patients than in HDs. Furthermore, PD-L1 expression on monocytes was higher in patients than in HDs.
    Conclusions: We showed the prognostic significance and population dynamics of peripheral monocytes in patients with OPSCC.
    MeSH term(s) Adult ; Aged ; Aged, 80 and over ; B7-H1 Antigen/blood ; Carcinoma, Squamous Cell/blood ; Carcinoma, Squamous Cell/mortality ; Carcinoma, Squamous Cell/pathology ; Female ; Humans ; Leukocyte Count ; Male ; Middle Aged ; Monocytes/physiology ; Neutrophils ; Oropharyngeal Neoplasms/blood ; Oropharyngeal Neoplasms/mortality ; Oropharyngeal Neoplasms/pathology ; Platelet Count ; Retrospective Studies ; Survival Rate
    Chemical Substances B7-H1 Antigen ; CD274 protein, human
    Language English
    Publishing date 2019-01-12
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 645165-2
    ISSN 1097-0347 ; 0148-6403 ; 1043-3074
    ISSN (online) 1097-0347
    ISSN 0148-6403 ; 1043-3074
    DOI 10.1002/hed.25625
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  8. Article ; Online: Transitional imaging of bone destruction in invasive sinus aspergillosis masquerading as idiopathic optic neuropathy.

    Shibata, Makoto / Iwazaki, Osamu / Fujita, Yukio / Nagashima, Kazuaki / Sakakura, Koichi / Hirato, Junko / Ikeda, Yoshio

    Journal of the neurological sciences

    2018  Volume 391, Page(s) 61–63

    MeSH term(s) Aged ; Aspergillosis/diagnostic imaging ; Aspergillosis/drug therapy ; Diagnosis, Differential ; Humans ; Male ; Optic Nerve Diseases/diagnosis ; Paranasal Sinuses ; Skull/diagnostic imaging
    Language English
    Publishing date 2018-06-01
    Publishing country Netherlands
    Document type Case Reports ; Letter ; Research Support, Non-U.S. Gov't
    ZDB-ID 80160-4
    ISSN 1878-5883 ; 0022-510X ; 0374-8642
    ISSN (online) 1878-5883
    ISSN 0022-510X ; 0374-8642
    DOI 10.1016/j.jns.2018.05.026
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  9. Article ; Online: Dynamic changes in immune cell profile in head and neck squamous cell carcinoma: Immunomodulatory effects of chemotherapy.

    Takahashi, Hideyuki / Sakakura, Koichi / Mito, Ikko / Ida, Shota / Chikamatsu, Kazuaki

    Cancer science

    2016  Volume 107, Issue 8, Page(s) 1065–1071

    Abstract: Tumor cells have evolved sophisticated means of escape from the host immune system. To date, several important immunological phenomena have been revealed in peripheral blood as well as within tumors. In the present study, we first investigated the ... ...

    Abstract Tumor cells have evolved sophisticated means of escape from the host immune system. To date, several important immunological phenomena have been revealed in peripheral blood as well as within tumors. In the present study, we first investigated the proportion and activation status of peripheral immune regulatory cells and CD8(+) T-cell subsets in patients with head and neck squamous cell carcinoma (HNSCC) using a multicolor flow cytometer, and then evaluated how therapy with docetaxel, cisplatin, and 5-fluorouracil modulated the immune cell profile in peripheral blood. The proportion of naïve T cells was lower and that of effector memory T cells (TEM ) was higher in HNSCC patients than in healthy donors. Moreover, the proportions of activated TEM cells and effector T cells (TEFF ) were dramatically increased in patients with advanced stage disease. The proportion of regulatory T cells and CD14(+) HLA-DR(-) myeloid-derived suppressor cells was elevated in HNSCC patients. Of note, after therapy, in addition to the transient reduction in immune regulatory cells, decreases in central memory T cells and increases in TEFF cells were observed among CD8(+) T-cell subsets, suggesting differentiation from central memory T cells into TEFF cells. Our results suggested that, despite the immunosuppressive status in HNSCC patients, tumor-specific immune responses mediated by CD8(+) T cells might be induced and maintained. Moreover, chemotherapy can trigger not only a transient reduction in immune regulatory cells but also further activation of CD8(+) T cells.
    MeSH term(s) Aged ; Aged, 80 and over ; CD8-Positive T-Lymphocytes/drug effects ; CD8-Positive T-Lymphocytes/immunology ; Carcinoma, Squamous Cell/blood ; Carcinoma, Squamous Cell/drug therapy ; Carcinoma, Squamous Cell/immunology ; Cisplatin/pharmacology ; Docetaxel ; Female ; Fluorouracil/pharmacology ; Head and Neck Neoplasms/blood ; Head and Neck Neoplasms/drug therapy ; Head and Neck Neoplasms/immunology ; Humans ; Immunologic Memory/drug effects ; Lymphocyte Activation/drug effects ; Male ; Middle Aged ; Squamous Cell Carcinoma of Head and Neck ; T-Lymphocytes, Regulatory/drug effects ; T-Lymphocytes, Regulatory/immunology ; Taxoids/pharmacology
    Chemical Substances Taxoids ; Docetaxel (15H5577CQD) ; Cisplatin (Q20Q21Q62J) ; Fluorouracil (U3P01618RT)
    Language English
    Publishing date 2016-06-24
    Publishing country England
    Document type Journal Article
    ZDB-ID 2115647-5
    ISSN 1349-7006 ; 1347-9032
    ISSN (online) 1349-7006
    ISSN 1347-9032
    DOI 10.1111/cas.12976
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  10. Article ; Online: Immunological and Clinicopathological Significance of MFG-E8 Expression in Patients with Oral Squamous Cell Carcinoma.

    Okamoto, Ayako / Sakakura, Koichi / Takahashi, Hideyuki / Motegi, Sei-Ichiro / Kaira, Kyoichi / Yokobori-Kuwabara, Yuki / Ishikawa, Osamu / Chikamatsu, Kazuaki

    Pathology oncology research : POR

    2019  Volume 26, Issue 2, Page(s) 1263–1268

    Abstract: Milk fat globule-epidermal growth factor 8 (MFG-E8) is a glycoprotein secreted by the activated macrophages and acts as a bridge between apoptotic cells and phagocytes. Aside from macrophages, a variety of malignant cells also express MFG-E8. The ... ...

    Abstract Milk fat globule-epidermal growth factor 8 (MFG-E8) is a glycoprotein secreted by the activated macrophages and acts as a bridge between apoptotic cells and phagocytes. Aside from macrophages, a variety of malignant cells also express MFG-E8. The objective of this study is to elucidate the clinical relevance and significance of MFG-E8 in the tumor microenvironment (TME) of patients with oral squamous cell carcinoma (OSCC). We investigated MFG-E8 expression in 74 patients with OSCC by immunohistochemistry and evaluated the relationship between MFG-E8 expression and various clinicopathological factors including immune cell infiltration. MFG-E8 expression was detected in 34 of 74 (45.9%) patients with OSCC and a significant correlation was observed with levels of infiltrating T cells, macrophages, and immunosuppressive M2 macrophages. Furthermore, MFG-E8 expression was also associated with clinical stage, lymphatic/vascular invasion, and Ki-67+ tumor cells but not with survival. Our results suggest that MFG-E8 may play an important role in shaping the immune suppressive network in TME as well as tumor progression.
    MeSH term(s) Adult ; Aged ; Aged, 80 and over ; Antigens, Surface/biosynthesis ; Biomarkers, Tumor/analysis ; Female ; Head and Neck Neoplasms/immunology ; Head and Neck Neoplasms/pathology ; Humans ; Lymphocytes, Tumor-Infiltrating/immunology ; Male ; Middle Aged ; Milk Proteins/biosynthesis ; Squamous Cell Carcinoma of Head and Neck/immunology ; Squamous Cell Carcinoma of Head and Neck/pathology ; Tumor Microenvironment/immunology
    Chemical Substances Antigens, Surface ; Biomarkers, Tumor ; MFGE8 protein, human ; Milk Proteins
    Language English
    Publishing date 2019-06-29
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 1375979-6
    ISSN 1532-2807 ; 1219-4956
    ISSN (online) 1532-2807
    ISSN 1219-4956
    DOI 10.1007/s12253-019-00692-3
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