Summary

Akiko Sekiguchi received her Ph.D. in Dermatology. She studies the mechanisms of pressure ulcers and develops new treatments for these diseases. She is also interested in autoimmune diseases, such as systemic sclerosis and dermatomyositis.

In the past, Dr. Sekiguchi conducted vigorous studies of skin wound healing, including pressure ulcers. She found that a local injection of botulinum toxin and mesenchymal stem cells inhibited ulceration caused by ischemia-reperfusion injury. She identified that a zinc deficiency exacerbates pressure ulcers by increasing oxidative stress and ATP in the skin. 

In other research, Dr. Sekiguchi has actively conducted basic and clinical research on systemic sclerosis. She revealed the physiological role of extracellular ATP in the regulation of skin fibrosis and found that kaempferol, a kind of polyphenol, has an inhibitory effect. Recently, she became interested in the inhibitory effect of bleomycin-induced skin fibrosis by regulating the balance of regulatory T cells and Th17 cells.

Research Statement

The skin is the largest organ in our body and performs a complex function to protect our internal organs from external stimuli. One of the main features of the skin is its function in the immune system. A disruption in skin immunity can cause various diseases and impact the functioning of the entire body. Dr. Sekiguchi is currently interested in the mechanisms by which the skin immune system relates to skin and systemic health. She plans to use the latest technology to study the skin's immune system and conduct research to elucidate the pathogenesis of intractable skin diseases caused by its disorders.

Scientific Publications

Inhibition of skin fibrosis in systemic sclerosis by botulinum toxin B via the suppression of oxidative stress.

Baral H, Sekiguchi A, Uchiyama A, Nisaa Amalia S, Yamazaki S, Inoue Y, Yokoyama Y, Ogino S, Torii R, Hosoi M, Akai R, Iwawaki T, Ishikawa O, Motegi SI
J Dermatol.
2021 Jul;
48(7).
doi: 10.1111/1346-8138.15888
PMID: 33840125

Apelin/APJ signaling suppresses the pressure ulcer formation in cutaneous ischemia-reperfusion injury mouse model.

Yamazaki S, Sekiguchi A, Uchiyama A, Fujiwara C, Inoue Y, Yokoyama Y, Ogino S, Torii R, Hosoi M, Akai R, Iwawaki T, Ishikawa O, Motegi SI
Sci Rep.
2020 Jan 28;
10(1).
doi: 10.1038/s41598-020-58452-2
PMID: 31992828

Inhibitory effect of kaempferol on skin fibrosis in systemic sclerosis by the suppression of oxidative stress.

Sekiguchi A, Motegi SI, Fujiwara C, Yamazaki S, Inoue Y, Uchiyama A, Akai R, Iwawaki T, Ishikawa O
J Dermatol Sci.
2019 Oct;
96(1).
doi: 10.1016/j.jdermsci.2019.08.004
PMID: 31447184

Zinc deficiency exacerbates pressure ulcers by increasing oxidative stress and ATP in the skin.

Nakamura H, Sekiguchi A, Ogawa Y, Kawamura T, Akai R, Iwawaki T, Makiguchi T, Yokoo S, Ishikawa O, Motegi SI
J Dermatol Sci.
2019 Aug;
95(2).
doi: 10.1016/j.jdermsci.2019.07.004
PMID: 31327530

The Regulation of Skin Fibrosis in Systemic Sclerosis by Extracellular ATP via P2Y(2) Purinergic Receptor.

Perera LMB, Sekiguchi A, Uchiyama A, Uehara A, Fujiwara C, Yamazaki S, Yokoyama Y, Ogino S, Torii R, Hosoi M, Ishikawa O, Motegi SI
J Invest Dermatol.
2019 Apr;
139(4).
doi: 10.1016/j.jid.2018.10.027
PMID: 30404019

Botulinum toxin B suppresses the pressure ulcer formation in cutaneous ischemia-reperfusion injury mouse model: Possible regulation of oxidative and endoplasmic reticulum stress.

Sekiguchi A, Motegi SI, Uchiyama A, Uehara A, Fujiwara C, Yamazaki S, Perera B, Nakamura H, Ogino S, Yokoyama Y, Akai R, Iwawaki T, Ishikawa O
J Dermatol Sci.
2018 May;
90(2).
doi: 10.1016/j.jdermsci.2018.01.006
PMID: 29402605

Protective effect of mesenchymal stem cells on the pressure ulcer formation by the regulation of oxidative and endoplasmic reticulum stress.

Motegi SI, Sekiguchi A, Uchiyama A, Uehara A, Fujiwara C, Yamazaki S, Perera B, Nakamura H, Ogino S, Yokoyama Y, Akai R, Iwawaki T, Ishikawa O
Sci Rep.
2017 Dec 7;
7(1).
doi: 10.1038/s41598-017-17630-5
PMID: 29215059

Education

Gunma University School of Medicine 
M.D. (2008)

Gunma University Graduate School of Medicine 
Ph.D., Dermatology (2020)

Experience

Clinical Staff Member 
Gunma University Graduate School of Medicine (2014-2021)

Postdoctoral Fellowship 
Gunma University Graduate School of Medicine (2020-2021)

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