Oxidative stress in the levator aponeurosis in Asian involutional blepharoptosis

Satoru Kase, Mika Noda, Hiroshi Yoshikawa, Teppei Yamamoto, Kan Ishijima, Susumu Ishida

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Purpose: To analyze the histopathology and expression of 8-hydroxydeoxyguanosine (OHdG), a marker of oxidative stress, in the levator aponeurosis tissues of involutional aponeurotic and congenital blepharoptosis patients, and adult subjects with no history of blepharoptosis. Methods: Fourteen and 4 levator aponeurosis tissues obtained from Asian patients with involutional and congenital blepharoptosis and 3 normal adult tissues were examined. All tissues were fixed in 4% paraformaldehyde, embedded in paraffin, and then submitted for hematoxylin and eosin staining and immunohistochemistry with anti-8-OHdG antibody. Results: The levator aponeurosis tissues contained spindle smooth muscle fibers and striated muscles. Nuclear immunoreactivity for 8-OHdG was noted in striated and smooth muscle cells in all the tissues. The 8-OHdG-positive rate was significantly lower in congenital blepharoptosis than involutional blepharoptosis (p < 0.05). Moreover, the number of 8-OHdG-positive striated muscle cells was significantly higher in the involutional blepharoptosis than normal tissues (p < 0.05). In contrast, there was a rare positive 8- OHdGimmunoreactivity of smooth muscle cells in the aponeurotic tissues of the involutional blepharoptosis patients. Conclusions: Levator aponeurosis in involutional aponeurotic blepharoptosis tissues showed oxidative stress in the muscle, indicating that oxidative stress plays a potential role in the pathologic study of the disease.

Original languageEnglish
Pages (from-to)290-294
Number of pages5
JournalOphthalmic Plastic and Reconstructive Surgery
Volume30
Issue number4
DOIs
Publication statusPublished - 2014
Externally publishedYes

Fingerprint

Blepharoptosis
Oxidative Stress
Striated Muscle
Smooth Muscle Myocytes
Aponeurosis
Hematoxylin
Eosine Yellowish-(YS)
Paraffin
Muscle Cells
Smooth Muscle
Immunohistochemistry
8-oxo-7-hydrodeoxyguanosine
Staining and Labeling
Muscles

ASJC Scopus subject areas

  • Ophthalmology
  • Surgery

Cite this

Oxidative stress in the levator aponeurosis in Asian involutional blepharoptosis. / Kase, Satoru; Noda, Mika; Yoshikawa, Hiroshi; Yamamoto, Teppei; Ishijima, Kan; Ishida, Susumu.

In: Ophthalmic Plastic and Reconstructive Surgery, Vol. 30, No. 4, 2014, p. 290-294.

Research output: Contribution to journalArticle

Kase, Satoru ; Noda, Mika ; Yoshikawa, Hiroshi ; Yamamoto, Teppei ; Ishijima, Kan ; Ishida, Susumu. / Oxidative stress in the levator aponeurosis in Asian involutional blepharoptosis. In: Ophthalmic Plastic and Reconstructive Surgery. 2014 ; Vol. 30, No. 4. pp. 290-294.
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abstract = "Purpose: To analyze the histopathology and expression of 8-hydroxydeoxyguanosine (OHdG), a marker of oxidative stress, in the levator aponeurosis tissues of involutional aponeurotic and congenital blepharoptosis patients, and adult subjects with no history of blepharoptosis. Methods: Fourteen and 4 levator aponeurosis tissues obtained from Asian patients with involutional and congenital blepharoptosis and 3 normal adult tissues were examined. All tissues were fixed in 4{\%} paraformaldehyde, embedded in paraffin, and then submitted for hematoxylin and eosin staining and immunohistochemistry with anti-8-OHdG antibody. Results: The levator aponeurosis tissues contained spindle smooth muscle fibers and striated muscles. Nuclear immunoreactivity for 8-OHdG was noted in striated and smooth muscle cells in all the tissues. The 8-OHdG-positive rate was significantly lower in congenital blepharoptosis than involutional blepharoptosis (p < 0.05). Moreover, the number of 8-OHdG-positive striated muscle cells was significantly higher in the involutional blepharoptosis than normal tissues (p < 0.05). In contrast, there was a rare positive 8- OHdGimmunoreactivity of smooth muscle cells in the aponeurotic tissues of the involutional blepharoptosis patients. Conclusions: Levator aponeurosis in involutional aponeurotic blepharoptosis tissues showed oxidative stress in the muscle, indicating that oxidative stress plays a potential role in the pathologic study of the disease.",
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