Updated on 2024/12/25

写真a

 
KAJITA Ai
 
Organization
Okayama University Hospital Assistant Professor
Position
Assistant Professor
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Degree

  • 医学博士 ( 岡山大学大学院医歯薬学総合研究科 )

Research Interests

  • 自然免疫

  • 皮膚ウイルス感染症

  • 表皮角化細胞

Research Areas

  • Life Science / Dermatology

Research History

  • 岡山大学病院

    2019.4

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    Country:Japan

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Papers

  • Interferon-Gamma Enhances TLR3 Expression and Anti-Viral Activity in Keratinocytes Reviewed

    Ai Kajita, Shin Morizane, Tetsuya Takiguchi, Takenobu Yamamoto, Masao Yamada, Keiji Iwatsuki

    JOURNAL OF INVESTIGATIVE DERMATOLOGY   135 ( 8 )   2005 - 2011   2015.8

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:ELSEVIER SCIENCE INC  

    Toll-like receptors (TLRs) recognize specific microbial products in the innate immune response. TLR3, a double-stranded RNA sensor, is thought to have an important role in viral infections, but the regulation of TLR3 expression and its function in keratinocytes are not fully understood. Here we show the Th1 cytokine IFN-gamma increased the TLR3 expression via STAT1 in cultured normal human epidermal keratinocytes (NHEKs). Co-stimulation with IFN-gamma and the TLR3 ligand poly (I:C) synergistically increased the expression of IFN-beta, IL-6, IL-8, and human beta-defensin-2 in NHEKs compared with poly (I:C) or IFN-gamma alone. These synergistic inductions were significantly inhibited by an endosomal acidification inhibitor, chloroquine, and by TLR3 siRNA. Co-stimulation with IFN-gamma and poly (I:C) also significantly enhanced the anti-viral activity against herpes simplex virus type-1 in NHEKs compared with poly (I:C) or IFN-gamma alone. In addition to the in vitro findings, an immunohistochemical analysis revealed IFN-gamma positive cells surrounding herpetic vesicles. These findings indicate that IFN-gamma might contribute to the innate immune response to cutaneous viral infections by enhancing TLR3 expression and function in keratinocytes.

    DOI: 10.1038/jid.2015.125

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  • Elevated expression of interleukin‐6 (<scp>IL</scp>‐6) and serum amyloid A (<scp>SAA</scp>) in the skin and the serum of recessive dystrophic epidermolysis bullosa: Skin as a possible source of <scp>IL</scp>‐6 through Toll‐like receptor ligands and <scp>SAA</scp> Reviewed

    Yoshio Kawakami, Ai Kajita, Ken‐Ichi Hasui, Yoshihiro Matsuda, Keiji Iwatsuki, Shin Morizane

    Experimental Dermatology   33 ( 3 )   2024.3

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    Publishing type:Research paper (scientific journal)   Publisher:Wiley  

    Abstract

    The effect of persistent skin inflammation on extracutaneous organs and blood is not well studied. Patients with recessive dystrophic epidermolysis bullosa (RDEB), a severe form of the inherited blistering skin disorder, have widespread and persistent skin ulcers, and they develop various complications including anaemia, hyperglobulinaemia, hypoalbuminaemia and secondary amyloidosis. These complications are associated with the bioactivities of IL‐6, and the development of secondary amyloidosis requires the persistent elevation of serum amyloid A (SAA) level. We found that patients with RDEB had significantly higher serum levels of IL‐6 and SAA compared to healthy volunteers and patients with psoriasis or atopic dermatitis. Both IL‐6 and SAA were highly expressed in epidermal keratinocytes and dermal fibroblasts of the skin ulcer lesions. Keratinocytes and fibroblasts surrounding the ulcer lesions are continuously exposed to Toll‐like receptor (TLR) ligands, pathogen‐associated and damage‐associated molecular pattern molecules. In vitro, TLR ligands induced IL‐6 expression via NF‐κB in normal human epidermal keratinocytes (NHEKs) and dermal fibroblasts (NHDFs). SAA further induced the expression of IL‐6 via TLR1/2 and NF‐κB in NHEKs and NHDFs. The limitation of this study is that NHEKs and NHDFs were not derived from RDEB patients. These observations suggest that TLR‐mediated persistent skin inflammation might increase the risk of IL‐6‐related systemic complications, including RDEB.

    DOI: 10.1111/exd.15040

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  • Vulvar Crohn's disease presenting with multiple exophytic nodules and labial swelling: A case report. Reviewed International journal

    Ai Kajita, Yoshio Kawakami, Sakiko Hiraoka, Junko Haraga, Shin Morizane

    The Journal of dermatology   2023.8

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    Authorship:Lead author   Language:English  

    DOI: 10.1111/1346-8138.16918

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  • A case of Japanese spotted fever with asymptomatic cerebral infarction and pulmonary artery embolism. Reviewed International journal

    Eriko Fujii, Osamu Yamasaki, Ai Kajita, Yuki Akamatsu, Tomoko Kawamoto, Tomoko Miyake, Koh Tadokoro, Yoichi Takaya, Shin Morizane

    European journal of dermatology : EJD   33 ( 1 )   45 - 47   2023.2

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    DOI: 10.1684/ejd.2023.4413

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  • MRIにて大腿骨と腸骨に骨髄浮腫がみられた下肢の線状強皮症の1例 Reviewed

    佐藤 志帆, 梶田 藍, 山崎 修, 中原 龍一, 森実 真

    西日本皮膚科   84 ( 6 )   521 - 525   2022.12

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    Language:Japanese   Publisher:日本皮膚科学会-西部支部  

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  • Novel homozygous missense mutation c.1654G>T in the ALOX12B gene causing congenital ichthyosiform erythroderma. Reviewed International journal

    Kotoe Mae, Yoshio Kawakami, Ai Kajita, Takuya Takeichi, Tatsuhiro Noda, Yoji Hirai, Masashi Akiyama, Shin Morizane

    The Journal of dermatology   50 ( 1 )   e37-e38   2022.10

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    Authorship:Corresponding author   Language:English  

    DOI: 10.1111/1346-8138.16601

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  • Impetigo herpetiformis successfully treated with brodalumab. Reviewed International journal

    Yumi Nakai, Himino Ashida, Ai Kajita, Emi Yokoyama, Kazumitsu Sugiura, Shin Morizane

    The Journal of dermatology   49 ( 4 )   e149-e150   2022.4

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  • Multifaceted Analysis of IL-23A- and/or EBI3-Including Cytokines Produced by Psoriatic Keratinocytes Reviewed International journal

    Kota Tachibana, Nina Tang, Hitoshi Urakami, Ai Kajita, Mina Kobashi, Hayato Nomura, Minori Sasakura, Satoru Sugihara, Fan Jiang, Nahoko Tomonobu, Masakiyo Sakaguchi, Mamoru Ouchida, Shin Morizane

    International Journal of Molecular Sciences   22 ( 23 )   12659 - 12659   2021.11

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:MDPI AG  

    Interleukin (IL) 23 (p19/p40) plays a critical role in the pathogenesis of psoriasis and is upregulated in psoriasis skin lesions. In clinical practice, anti-IL-23Ap19 antibodies are highly effective against psoriasis. IL-39 (p19/ Epstein-Barr virus-induced (EBI) 3), a newly discovered cytokine in 2015, shares the p19 subunit with IL-23. Anti-IL-23Ap19 antibodies may bind to IL-39; also, the cytokine may contribute to the pathogenesis of psoriasis. To investigate IL23Ap19- and/or EBI3-including cytokines in psoriatic keratinocytes, we analyzed IL-23Ap19 and EBI3 expressions in psoriasis skin lesions, using immunohistochemistry and normal human epidermal keratinocytes (NHEKs) stimulated with inflammatory cytokines, using quantitative real-time polymerase chain reaction (RT-PCR), enzyme-linked immunosorbent assay (ELISA), and liquid chromatography-electrospray tandem mass spectrometry (LC-Ms/Ms). Immunohistochemical analysis showed that IL-23Ap19 and EBI3 expressions were upregulated in the psoriasis skin lesions. In vitro, these expressions were synergistically induced by the triple combination of tumor necrosis factor (TNF)-α, IL-17A, and interferon (IFN)-γ, and suppressed by dexamethasone, vitamin D3, and acitretin. In ELISA and LC-Ms/Ms analyses, keratinocyte-derived IL-23Ap19 and EBI3, but not heterodimeric forms, were detected with humanized anti-IL-23Ap19 monoclonal antibodies, tildrakizumab, and anti-EBI3 antibodies, respectively. Psoriatic keratinocytes may express IL-23Ap19 and EBI3 proteins in a monomer or homopolymer, such as homodimer or homotrimer.

    DOI: 10.3390/ijms222312659

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  • Staphylococcal enterotoxin B- and lipopolysaccharide-induced toxic shock syndrome in a burn patient. Reviewed International journal

    Osamu Yamasaki, Satoru Sugihara, Ai Kajita, Emi Yokoyama, Tomoko Miyake, Yoji Hirai, Shin Morizane

    The Journal of dermatology   48 ( 4 )   547 - 550   2021.4

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    Toxic shock syndrome (TSS) is caused by toxic shock syndrome toxin 1 or enterotoxins secreted by Staphylococcus aureus. Lipopolysaccharide (LPS) has also been shown to play a major role in the development of sepsis. Staphylococcal superantigens and LPS operate synergistically in conditioning cytokine release and lethal shock in mice. An 80-year-old woman was admitted because of a 20% mixed-depth flame burn. Despite two excisions and grafts, necrotic ulcers with methicillin-resistant Staphylococcus aureus (MRSA) colonization remained. On the 7th day after the operation, she developed shock with an erythematous rash. Blood examination revealed evidence of disseminated intravascular coagulation, and liver and renal dysfunction. A blood culture revealed a staphylococcal enterotoxin B (SEB)-producing strain of MRSA and Klebsiella pneumoniae. The septic symptoms were prolonged, but the condition gradually improved with extensive treatment. T-cell receptor analysis demonstrated a marked accumulation of SEB-mediated Vβ T cells. Stimulation of peripheral blood mononuclear cells in the recovery phase with SEB and LPS induced additive effects on tumor necrosis factor-α, interferon-γ, and interleukin-6 production. Although the present case did not fulfill the clinical criteria for TSS, the additive effects of SEB and LPS might have caused the severe septic shock.

    DOI: 10.1111/1346-8138.15729

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  • Solitary fibrous tumor of the inguinal region displaying heterogeneous echogenicity and its correlation with histopathologic findings Reviewed

    Ai Kajita, Yoshio Kawakami, Tomoko Miyake, Wakako Oda, Osamu Yamasaki, Shin Morizane

    Our Dermatology Online   11 ( 4 )   432 - 433   2020.11

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    Authorship:Lead author   Publishing type:Research paper (scientific journal)   Publisher:Our Dermatology Online  

    DOI: 10.7241/ourd.20204.28

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  • Multifaceted Analyses of Epidermal Serine Protease Activity in Patients with Atopic Dermatitis Reviewed

    Hayato Nomura, Mutsumi Suganuma, Takuya Takeichi, Michihiro Kono, Yuki Isokane, Ko Sunagawa, Mina Kobashi, Satoru Sugihara, Ai Kajita, Tomoko Miyake, Yoji Hirai, Osamu Yamasaki, Masashi Akiyama, Shin Morizane

    International Journal of Molecular Sciences   21 ( 3 )   913 - 913   2020.1

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    The serine proteases kallikrein-related peptidase (KLK) 5 and KLK7 cleave cell adhesion molecules in the epidermis. Aberrant epidermal serine protease activity is thought to play an important role in the pathogenesis of atopic dermatitis (AD). We collected the stratum corneum (SC) from healthy individuals (n = 46) and AD patients (n = 63) by tape stripping and then measuring the trypsin- and chymotrypsin-like serine protease activity. We also analyzed the p.D386N and p.E420K of SPINK5 variants and loss-of-function mutations of FLG in the AD patients. The serine protease activity in the SC was increased not only in AD lesions but also in non-lesions of AD patients. We found, generally, that there was a positive correlation between the serine protease activity in the SC and the total serum immunoglobulin E (IgE) levels, serum thymus and activation-regulated chemokine (TARC) levels, and peripheral blood eosinophil counts. Moreover, the p.D386N or p.E420K in SPINK5 and FLG mutations were not significantly associated with the SC’s serine protease activity. Epidermal serine protease activity was increased even in non-lesions of AD patients. Such activity was found to correlate with a number of biomarkers of AD. Further investigations of serine proteases might provide new treatments and prophylaxis for AD.

    DOI: 10.3390/ijms21030913

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  • An effective and promising treatment with adalimumab for impetigo herpetiformis with postpartum flare-up. Reviewed International journal

    Tamayo Yamashita, Toshihisa Hamada, Yuka Maruta, Ai Kajita, Yoji Hirai, Shin Morizane, Soichiro Watanabe, Kazumitsu Sugiura, Keiji Iwatsuki

    International journal of dermatology   58 ( 3 )   350 - 353   2019.3

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    DOI: 10.1111/ijd.14141

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  • 直接作用型抗ウイルス薬によるC型肝炎治療後も症状が持続していた形質細胞性口唇炎の1例 Reviewed

    永瀬 喬之, 梶田 藍, 小田 和歌子, 原 裕一, 川上 佳夫

    皮膚科の臨床   61 ( 3 )   419 - 422   2019.3

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    Language:Japanese   Publisher:金原出版(株)  

    <文献概要>70歳,女性。3年前より下口唇にびらんが出現した。1年半前にC型慢性肝炎に対して,レジパスビル/ソホスブビル内服による直接作用型抗ウイルス薬治療を行いHCV RNAは陰性化したが,下口唇の症状は残存していた。初診時,下口唇にびらんを認め,病理検査では真皮内に多数の形質細胞浸潤がみられた。下口唇のびらんは0.1%タクロリムス軟膏を外用して治癒した。形質細胞性口唇炎と肝疾患との関連について述べた報告があるが,自験例ではHCVのウイルス量と口唇炎の病勢との間に直接的な関連は認められなかった。今後は症例の蓄積により,HCVとの関連が示唆される皮膚疾患に対する,直接作用型抗ウイルス薬の効果の有無が明らかにされることを期待したい。

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    Other Link: https://search.jamas.or.jp/default/link?pub_year=2019&ichushi_jid=J01266&link_issn=&doc_id=20190320030037&doc_link_id=10.18888%2Fhi.0000001277&url=https%3A%2F%2Fdoi.org%2F10.18888%2Fhi.0000001277&type=%E5%8C%BB%E6%9B%B8.jp_%E3%82%AA%E3%83%BC%E3%83%AB%E3%82%A2%E3%82%AF%E3%82%BB%E3%82%B9&icon=https%3A%2F%2Fjk04.jamas.or.jp%2Ficon%2F00024_2.gif

  • Toll-like receptor signalling induces the expression of serum amyloid A in epidermal keratinocytes and dermal fibroblasts Reviewed International journal

    S. Morizane, A. Kajita, K. Mizuno, T. Takiguchi, K. Iwatsuki

    Clinical and Experimental Dermatology   44 ( 1 )   40 - 46   2019.1

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    BACKGROUND: Toll-like receptors (TLRs) play critical roles in innate immune response by sensing pathogen- or damage-associated molecular patterns. Epidermal keratinocytes and dermal fibroblasts also produce proinflammatory cytokines and chemokines under stimulation with TLR ligands. Serum amyloid A (SAA) is an essential factor in the pathogenesis of secondary amyloidosis, and also has immunomodulatory functions. SAA are produced mainly by hepatocytes but also by a variety of cells, including immune cells, endothelial cells, synoviocytes, and epidermal keratinocytes. However, SAA expression in human dermal fibroblasts has not been shown to date. AIM: To investigate the effect of TLR ligands on SAA expression in epidermal keratinocytes and dermal fibroblasts. METHODS: We investigated whether TLR ligands induce the expression of SAA in normal human epidermal keratinocytes (NHEKs) and normal human dermal fibroblasts (NHDFs) by real-time quantitative PCR and ELISA. The effect of SAA on its own expression in NHDFs was also studied. RESULTS: SAA expression was induced via nuclear factor-κB by TLR1/2, 3, 5 and 2/6 ligands in NHEKs. In NHDFs, TLR1/2 and TLR2/6 ligands increased SAA expression. SAA further induced its own expression via TLR1/2 and NF-κB in NHDFs, as previously reported for NHEKs. CONCLUSIONS: Our results provide new evidence that the skin's innate immune response contributes to the production of SAA, which might lead to an increased risk of systemic complications such as secondary amyloidosis of recessive dystrophic epidermolysis bullosa.

    DOI: 10.1111/ced.13604

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  • 【代謝異常症・沈着症】Urate Milkが透視された痛風結節の1例 Reviewed

    篠倉 美理, 光井 聖子, 梶田 藍, 湧田 暁子, 川上 佳夫

    皮膚科の臨床   60 ( 9 )   1337 - 1340   2018.8

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    <文献概要>69歳,男性。肝膿瘍合併肝細胞癌の術前精査のため入院した翌日から,38℃台の発熱と左第4趾の疼痛が出現した。抗菌薬による加療を開始したが症状改善がなく,左第4趾DIP関節部に白色の液体貯留が透視されたため当科を初診した。白色液体を偏光顕微鏡で鏡検したところ尿酸結晶を認めたことから,痛風結節・痛風と診断し,早期に蜂窩織炎や膿瘍などの感染症と鑑別することができた。皮下に白色の液体貯留を認めた場合にはurate milkを想定し,痛風結節・痛風を疑って診察する必要がある。

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  • 下顎部に生じたPilonidal Sinus Reviewed

    川上 佳夫, 梶田 藍

    皮膚科の臨床   60 ( 9 )   1442 - 1443   2018.8

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    症例は69歳男性で、2ヵ月前に下顎部の皮下硬結を自覚し、1ヵ月前より排膿を認めた。受診時には下顎部に下床との可動性を有する紅色結節(8mm大)があり、中心部の瘻孔と少量の透明な滲出液を認めたが、自発痛はなく、一般細菌培養は陰性であった。毛包炎、癰、感染性粉瘤などを考えて抗菌薬の外用、内服を行うも局所の炎症症状は改善せず、発症から1年2ヵ月後に切除生検を行ったところ、病理組織像では皮下脂肪組織に重層扁平上皮で覆われた嚢腫と、内腔に多数の毛髪断面を認めた。また、嚢腫の辺縁には毛髪断面と異物巨細胞の浸潤がみられたことより、pilonidal sinusと診断した。術後5ヵ月経過現在、再発は認めていない。

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  • 【細菌・抗酸菌感染症】手掌に顕著な紅斑が認められたMRSAによるToxin-mediated Diseaseの1例 Reviewed

    中井 友美, 梶田 藍, 川上 佳夫, 佐々木 恵里佳, 菅波 由有, 山田 晴士, 平野 秀一郎, 河内 哲, 井上 智

    皮膚科の臨床   60 ( 8 )   1187 - 1190   2018.7

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    <文献概要>35歳,男性。左頭頂部脳内出血術後2ヵ月目に発熱が出現し,当院に入院した。全身にびまん性紅斑を認め,特に手指の浮腫と手掌の紅斑が顕著であった。入院3日目に頭頂部術後創部より排膿を認め,頭部MRIにて硬膜下膿瘍と診断した。開頭膿瘍除去術を施行し,メロペネム,バンコマイシン塩酸塩の点滴を行ったところ,術後2日目には皮疹はほぼ消退した。創部培養からはtoxin産生株のMRSAが検出された。自験例では,頭頂部術後創部のMRSA感染によりtoxinが全身に散布され,全身性びまん性紅斑をきたしたtoxin-mediated diseaseと考えた。早期治療により,toxic shock syndromeの診断基準を満たす前に症状が軽快したものと考えた。

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  • 【ウイルス感染症】高齢者に生じたコクサッキーウイルスA6型による手足口病 Reviewed

    川上 佳夫, 梶田 藍

    皮膚科の臨床   60 ( 4 )   479 - 482   2018.4

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    <文献概要>72歳,男性。4日前より咽頭痛が出現した。2日前に両側膝蓋部に皮疹が出現し,1日前より両下肢全体,両側手掌と足底にも皮疹が認められた。初診時には軟口蓋のびらん,両側下肢,躯幹に多発性の紅色丘疹,手掌・足底に多数の暗赤色斑と踵部の水疱形成を認めた。6日後に皮疹は速やかに自然軽快していたが,2ヵ月後に足爪の爪甲脱落を認めた。初診時と2週間後のペア血清を用いた中和抗体法(NT法)では,コクサッキーウイルスA6抗体のみが初診時64倍,2週間後512倍と有意に上昇していた。自験例では家族に同症はなく,職場の35歳の同僚が子どもからの感染で手足口病に罹患していたため,職場で同僚から飛沫感染した可能性が高いと考えた。

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  • 免疫チェックポイント阻害剤から緩和治療へ移行した進行期悪性黒色腫の検討 Reviewed

    梶田 藍, 山崎 修, 加持 達弥, 梅村 啓史, 岩月 啓氏

    西日本皮膚科   80 ( 1 )   51 - 55   2018.2

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    Authorship:Lead author   Language:Japanese   Publisher:日本皮膚科学会-西部支部  

    免疫チェックポイント阻害剤をはじめ進行期悪性黒色腫に対する新規治療が生存期間の延長に寄与している。しかし、免疫チェックポイント阻害剤の治療効果の判定は難しく、PD(progressive disease)症例での中止の判断も難しい。2014年7月より2016年6月に免疫チェックポイント阻害剤(ニボルマブ、イピリムマブ)を投与した進行期悪性黒色腫患者でPDとなり緩和治療へ移行した8例を検討した。男性2例、女性6例、平均年齢69.3歳。BRAF変異陰性例6例。PD判定から免疫チェックポイント阻害剤最終投与までの平均投与回数2.4回、平均投与期間36.1日、最終投与から死亡日までの平均期間36.1日であった。PD症例では治療の変更または緩和治療へ移行すべきであるが、他に選択肢がない場合はbeyond PDでも続行していることも多かった。(著者抄録)

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  • Cathelicidin antimicrobial peptide LL ‐37 augments interferon‐β expression and antiviral activity induced by double‐stranded RNA in keratinocytes Reviewed International journal

    T. Takiguchi, S. Morizane, T. Yamamoto, A. Kajita, K. Ikeda, K. Iwatsuki

    British Journal of Dermatology   171 ( 3 )   492 - 498   2014.9

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    BACKGROUND: Cathelicidin antimicrobial peptide LL-37 has the capacity to kill a wide range of microbes and to modify host immunity. Recently, our group observed that the activation of keratinocytes by LL-37 and DNA greatly increases interferon (IFN)-β through Toll-like receptor (TLR)9. However, the effect of LL-37 on the induction of IFN-β through TLR3, a sensor of double-stranded (ds) RNA, in keratinocytes is not well known. OBJECTIVES: To investigate whether LL-37 could affect TLR3 signalling and antiviral activity in normal human epidermal keratinocytes (NHEKs). METHODS: We investigated the production of IFN-β in NHEKs stimulated with a TLR3 ligand, poly (I:C), in the presence of LL-37. To examine the effect of LL-37 and poly (I:C) on antiviral activity, a virus plaque assay using herpes simplex (HS) virus type-1 was carried out. The uptake of poly (I:C) conjugated with fluorescein isothiocyanate (FITC) into the keratinocytes was observed in the presence of LL-37. Immunostaining for TLR3 and LL-37 was performed using skin samples from HS. RESULTS: LL-37 and poly (I:C) synergistically induced the expression of IFN-β in NHEKs. Furthermore, co-stimulation with LL-37 and poly (I:C) significantly decreased the viral plaque numbers compared with poly (I:C) or LL-37 alone. LL-37 enhanced the uptake of FITC-conjugated poly (I:C) into cells. Immunohistochemical analysis demonstrated that the expression of TLR3 and LL-37 is upregulated in HS lesions. CONCLUSIONS: Our findings suggest that LL-37 augments the antiviral activity induced by dsRNA in keratinocytes, which may contribute to the innate immune response to cutaneous viral infections such as HS.

    DOI: 10.1111/bjd.12942

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    Other Link: https://onlinelibrary.wiley.com/doi/full-xml/10.1111/bjd.12942

  • 眼底綿花様白斑を合併した全身性エリテマトーデスの1例 眼合併症と疾患活動性との関連性に関する検討 Reviewed

    杉生 真帆, 青山 裕美, 梶田 藍, 竹島 千夏, 濱田 利久, 松尾 俊彦, 赤塚 俊文, 岩月 啓氏

    臨床皮膚科   66 ( 12 )   960 - 964   2012.11

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    24歳,女性.両頬の蝶形紅斑と抗核抗体陽性により精査加療目的で当院を受診した.他臓器病変は認めなかった.全身性エリテマトーデス(systemic lupns erythematosus:SLE)と診断しステロイド治療を開始した.順調にテーパリングを行っていたが,治療開始から4ヵ月後に突然眼のかすみと視力低下を自覚し,眼底に綿花様白斑を認めSLE網膜症と診断された.このとき,皮膚症状は改善し血液データの変動もなかった.SLEのさまざまな眼合併症は,通常はSLEの病勢と一致して出現するが,過去9年間の当院のSLE患者の眼合併症の検討では,必ずしも皮膚症状や血液検査データにおけるSLEの病勢とは一致していなかった.SLEの眼合併症を皮疹や臨床検査値などから予測することは困難だが,放置していれば重篤な視力障害につながる危険が高く,注意すべき合併症である.(著者抄録)

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    Other Link: https://search.jamas.or.jp/default/link?pub_year=2012&ichushi_jid=J01559&link_issn=&doc_id=20121112150005&doc_link_id=10.11477%2Fmf.1412103457&url=https%3A%2F%2Fdoi.org%2F10.11477%2Fmf.1412103457&type=%E5%8C%BB%E6%9B%B8.jp_%E3%82%AA%E3%83%BC%E3%83%AB%E3%82%A2%E3%82%AF%E3%82%BB%E3%82%B9&icon=https%3A%2F%2Fjk04.jamas.or.jp%2Ficon%2F00024_2.gif

  • TH2 cytokines increase kallikrein 7 expression and function in patients with atopic dermatitis Reviewed International journal

    Shin Morizane, Kenshi Yamasaki, Ai Kajita, Kazuko Ikeda, Maosheng Zhan, Yumi Aoyama, Richard L. Gallo, Keiji Iwatsuki

    Journal of Allergy and Clinical Immunology   130 ( 1 )   259 - 261.e1   2012.7

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    DOI: 10.1016/j.jaci.2012.03.006

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  • 下眼瞼に腫瘤を形成し、顔面に丘疹が出没した菌状息肉症 Reviewed

    梶田 藍, 山崎 修, 朝倉 昇司, 山鳥 一郎, 市村 浩一, 吉野 正

    西日本皮膚科   72 ( 5 )   473 - 477   2010.10

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    Authorship:Lead author   Language:Japanese   Publisher:日本皮膚科学会-西部支部  

    59歳,男性。数年前より全身の紅斑,色素脱失があり,湿疹の治療を受けていた。半年前より左下眼瞼に腫瘤が徐々に増大し当院を受診した。腫瘤部の組織は中型から大型のリンパ球様細胞が真皮全層に認められ,表皮向性も伴っていた。菌状息肉症stageIIB(T3,N0,M0)と診断し,全身に内服PUVA療法と左下眼瞼の腫瘤に電子線照射40Gyを施行し,腫瘤は縮小した。経過中に顔面に紅色丘疹が出没した。比較的早期に腫瘤が出現しリンパ腫様丘疹症が合併していたことが特徴であった。顔面の丘疹,下眼瞼の腫瘤部ともにCD30陽性大型細胞が浸潤しており,菌状息肉症の経過中にCD30陽性lymphoproliferative disorderの変化を呈したと考えた。(著者抄録)

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MISC

  • 当院で経験したリンパ腫様丘疹症11例の臨床的検討

    廣瀬梓, 平井陽至, 三宅智子, 梶田藍, 山崎修, 森実真

    西日本皮膚科   84 ( 3 )   2022

  • 診断に難渋し、PET-CTにて低悪性度リンパ腫と診断された1例

    廣瀬 梓, 岡崎 布佐子, 梶田 藍

    日本皮膚科学会雑誌   129 ( 11 )   2345 - 2346   2019.10

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  • 右鼠径部皮下に生じたsolitary fibrous tumorの1例

    梶田 藍, 川上 佳夫, 新谷 大悟, 小田 和歌子

    日本皮膚科学会雑誌   127 ( 11 )   2498 - 2498   2017.10

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  • 熱傷瘢痕部に有棘細胞癌を合併したNRAS遺伝子変異陽性の悪性黒色腫

    山下 珠代, 高須賀 琴美, 丸田 悠加, 梶田 藍, 山崎 修, 岩月 啓氏, 鈴木 規弘, 塩路 康信

    日本皮膚科学会雑誌   127 ( 9 )   2143 - 2143   2017.8

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  • 免疫チェックポイント阻害剤から緩和治療へ移行した進行期悪性黒色腫8例の検討

    梶田 藍, 山崎 修, 加持 達弥, 梅村 啓史, 岩月 啓氏

    西日本皮膚科   79 ( 3 )   305 - 305   2017.6

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  • IVIGにより血小板減少をきたした難治性尋常性天疱瘡の1例

    浜重 純平, 野村 隼人, 禅正 和真, 河野 淳子, 難波 裕子, 梶田 藍, 平井 陽至, 岩月 啓氏, 松三 友子

    日本皮膚科学会雑誌   126 ( 11 )   2135 - 2136   2016.10

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  • 色素性乾皮症に生じた頭頂部悪性黒色腫

    梶田 藍, 河野 淳子, 難波 裕子, 平井 陽至, 加持 達弥, 山崎 修, 岩月 啓氏

    日本皮膚科学会雑誌   126 ( 8 )   1482 - 1482   2016.7

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  • 大腿に発生したintraepithelial sebaceous carcinoma

    梶田 藍, 河野 淳子, 難波 裕子, 平井 陽至, 加持 達弥, 山崎 修, 岩月 啓氏, 谷口 恒平, 柳井 広之

    日本皮膚科学会雑誌   126 ( 3 )   322 - 323   2016.3

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  • 外傷が契機と思われるnecrobiosis lipoidica

    梶田 藍, 山崎 修, 岩月 啓氏, 松浦 能子

    日本皮膚科学会雑誌   125 ( 11 )   2093 - 2093   2015.10

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  • Interferon-gamma enhances TLR3 expression and anti-viral activity in keratinocytes

    S. Morizane, A. Kajita, T. Takiguchi, T. Yamamoto, M. Yamada, K. Iwatsuki

    JOURNAL OF INVESTIGATIVE DERMATOLOGY   135 ( 8 )   S95 - S95   2015.5

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    DOI: 10.1038/jid.2015.125

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  • Th2サイトカインはアトピー性皮膚炎患者におけるカリクレイン7の発現と機能を増強する

    森実 真, 山崎 研志, 梶田 藍, 池田 佳寿子, Zhan Maosheng, 青山 裕美, Gallo Richard L., 岩月 啓氏

    岡山医学会雑誌   125 ( 3 )   217 - 220   2013.12

  • アトピー性皮膚炎の表皮角化細胞における組織カリクレイン7の発現

    森実 真, 山崎 研志, 瀧口 徹也, 池田 佳寿子, 梶田 藍, 青山 裕美, 岩月 啓氏

    西日本皮膚科   74 ( 2 )   215 - 215   2012.4

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  • Trichophyton tonsuransによるケルスス禿瘡の1例

    林 晴子, 梶田 藍, 深松 紘子, 山本 剛伸, 三浦 由宏

    日本皮膚科学会雑誌   121 ( 11 )   2283 - 2283   2011.10

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  • SLEに発症した網膜症(綿花様白斑)と疾患活動性との比較検討

    杉生 真帆, 梶田 藍, 竹島 千夏, 濱田 利久, 青山 裕美, 岩月 啓氏, 松尾 俊彦, 赤塚 俊文

    日本皮膚科学会雑誌   121 ( 11 )   2278 - 2278   2011.10

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  • 下眼瞼の腫瘤を形成し、顔面に丘疹が出没する菌状息肉症

    梶田 藍, 山崎 修, 西原 修美, 朝倉 昇司

    日本皮膚科学会雑誌   121 ( 10 )   2074 - 2074   2011.9

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  • 間質性肺炎が先行するANCA関連血管炎について

    梶田 藍, 濱田 利久, 岩月 啓氏, 谷本 安, 矢野 隆介, 金森 達也

    日本皮膚科学会雑誌   121 ( 10 )   2080 - 2080   2011.9

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  • 非結核性抗酸菌による難治性潰瘍の3例

    大野 貴司, 井形 華絵, 梶田 藍, 大塚 正樹, 濱田 利久, 岩月 啓氏, 野村 知代, 片山 治子, 中永 和枝, 石井 則久

    日本皮膚科学会雑誌   121 ( 10 )   2078 - 2078   2011.9

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  • 当院で施行した悪性黒色腫に対するセンチネルリンパ節生検結果についての考察 遺伝子診断結果を中心に

    鈴木 規弘, 梶田 藍, 安井 陽子, 多田 光太郎, 大塚 正樹, 山崎 修, 浅越 健治, 田中 了

    日本皮膚悪性腫瘍学会学術大会プログラム・抄録集   27回   149 - 149   2011.6

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  • アトピー性皮膚炎における角化細胞産生カリクレイン7の発現制御機構

    森実 真, 梶田 藍, 山崎 研志, 岩月 啓氏

    Journal of Environmental Dermatology and Cutaneous Allergology   4 ( 5 )   437 - 437   2010.11

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  • UVA、可視光線により膨疹の誘発を確認した日光蕁麻疹

    竹島 千夏, 濱田 利久, 梶田 藍, 大野 貴司, 岩月 啓氏, 青地 聖子

    Journal of Environmental Dermatology and Cutaneous Allergology   3 ( 4 )   320 - 320   2009.10

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  • 下眼瞼に腫瘤を形成し、顔面に丘疹が出没した菌状息肉症

    梶田 藍, 山崎 修, 朝倉 昇司, 山鳥 一郎, 市村 浩一, 吉野 正

    日本皮膚悪性腫瘍学会学術大会プログラム・抄録集   25回   181 - 181   2009.5

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  • サイトメガロウイルス感染を契機に血球貪食症候群、多臓器不全を呈した難治性成人発症Still病の一例

    梶田 藍, 北川 正史, 竹山 貴久, 赤木 滋, 大石 徹也

    岡山医療センター年報   4   207 - 208   2008.12

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    Language:Japanese   Publisher:(独)国立病院機構岡山医療センター  

    41歳女。患者は全身の皮疹、関節痛、高熱、咽頭痛を主訴とした。脾腫および肝機能異常、高フェリチン血症が認められ、成人発症Still病と診断された。治療としてプレドニゾロン(PSL)内服が開始されたが熱型の改善は得られなかった。そこで、メチルPSLパルス療法を施行、症状の活動性を抑えることができたものの、PSL増量しても症状が抑えきれなくなった。以後、2回目のパルス療法施行直後から発熱に加えて咽頭痛、頸部リンパ節腫脹、嘔吐、下痢、更に循環器不全、凝固異常、肝障害、腎障害、および肺野にスリガラス陰影が認められた。播種性血管内凝固の状態と考え、ICU管理とし、精査を施行したところ、サイトメガロウイルス感染、真菌感染、血球貪食症候群、無顆粒球症を合併した多臓器不全の状態であった。抗ウイルス薬、抗真菌薬、抗生剤、ステロイド、γ-グロブリンの投与、あわせて血液濾過透析、輸血、血漿交換を施行した結果、無顆粒球症は改善したが、全身状態の改善は認められず、患者は第66病日目に死亡となった。

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Presentations

  • 外陰部病変を伴ったクローン病の1例

    梶田 藍

    第153回日本皮膚科学会広島地方会  2023.9.2 

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  • 右鼠径部に生じたsolitary fibrous tumorの1例

    梶田 藍

    第272回日本皮膚科学会岡山地方会  2017.9.3 

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    Event date: 2017.9.3

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  • 免疫チェックポイント阻害剤から緩和治療へ移行した進行期悪性黒色腫8例の検討

    梶田 藍

    第68回日本皮膚科学会西部支部学術大会  2016.11.19 

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    Event date: 2016.11.19 - 2016.11.20

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  • 色素性乾皮症に生じた頭頂部悪性黒色腫

    梶田 藍

    第268回日本皮膚科学会岡山地方会  2016.4.24 

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    Event date: 2016.4.24

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  • 大腿に発生したintraepithelial sebacious carcinoma

    梶田 藍

    第267回日本皮膚科学会岡山地方会  2016.1.16 

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    Event date: 2016.1.16

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  • 外傷が契機と思われるnecrobiosis lipoidica

    梶田 藍

    第266回日本皮膚科学会岡山地方会  2015.9.6 

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  • Interferon gamma enhances innate immune response of epidermis through TLR3 in keratinocytes

    Ai Kajita

    The 71st Society for Investigative Dermatology Annual Meeting  2011.5.6 

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    Event date: 2011.5

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Awards

  • The Okayama Medical Assosication Prise

    2015.6   Interferon-Gamma Enhances TLR3 Expression and Anti-Viral Activity in Keratinocytes

    Ai Tenta(Ai Kajit

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Research Projects

  • Development of an external medicine which targets Toll-like receptor 3 in keratinocytes

    Grant number:20K17351  2020.04 - 2022.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Early-Career Scientists  Grant-in-Aid for Early-Career Scientists

    Kajita Ai

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    Grant amount:\4160000 ( Direct expense: \3200000 、 Indirect expense:\960000 )

    We have focused on the innate immunity mechanism of skin viral infection in keratinocytes. Especially poly(I:C) enhances anti-viral activity via Toll-like receptor 3 (TLR3).The aim of this project is the creation of new external medicine with short chain double-strands RNA which targets TLR3 in keratinocytes.
    We have shown that anti-viral factor was induced by short chain RNA with small molecular weight. We are currently investigating the effect of short chain RNA on antiviral activity in keratinocytes.

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  • Dermatology (2024academic year) Third semester  - 火5

  • Dermatology (Core Clinical Practice) (2024academic year) special  - その他

  • Dermatology (2024academic year) special  - その他

  • Dermatology (2023academic year) Third semester  - 火5

  • Dermatology (Core Clinical Practice) (2023academic year) special  - その他

  • Dermatology (2023academic year) special  - その他

  • Dermatology (2022academic year) Third semester  - 火5

  • Dermatology (Core Clinical Practice) (2022academic year) special  - その他

  • Dermatology (2022academic year) special  - その他

  • Dermatology (Core Clinical Practice) (2021academic year) special  - その他

  • Dermatology (2021academic year) special  - その他

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