Tear hypoxia-inducible factor-1α expression, lactate dehydrogenase, and malate dehydrogenase activity changes in soft contact lens wear

  • Tri Rahayu Department of Ophthalmolgy, Faculty of Medicine, Universitas Indonesia, Cipto Mangunkusumo Hospital, Jakarta, Indonesia; JEC Hospitals, Jakarta, Indonesia https://orcid.org/0000-0003-4713-3444
  • Tjahjono Darminto Gondhowiardjo Department of Ophthalmolgy, Faculty of Medicine, Universitas Indonesia, Cipto Mangunkusumo Hospital, Jakarta, Indonesia; JEC Hospitals, Jakarta, Indonesia
  • Widya Artini Department of Ophthalmolgy, Faculty of Medicine, Universitas Indonesia, Cipto Mangunkusumo Hospital, Jakarta, Indonesia; JEC Hospitals, Jakarta, Indonesia
  • Septelia Inawati Wanandi Department of Biochemistry and Molecular Biology, Faculty of Medicine, Universitas Indonesia, Jakarta, Indonesia https://orcid.org/0000-0002-7963-8853
Keywords: contact lenses, cornea, hypoxia, hypoxia-inducible factor 1, lactate dehydrogenase, malate dehydrogenase
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BACKGROUND Soft contact lens (SCL) wear can lead to a corneal hypoxia. However, there is a lack of studies looking for corneal hypoxia biomarkers in tear. This study aimed to investigate corneal hypoxia among SCL wearers based on hypoxia-inducible factor-1α (HIF-1α) expression, tear lactate dehydrogenase (LDH), and malate dehydrogenase (MDH) activities.

METHODS A nonrandomized clinical trial was conducted on two groups. SCLs were prescribed for 2 months to a group of new wearers. Meanwhile, SCL wear was discontinued for 1 month in a group of long-term wearers. Tear samples were then collected on days 1, 7, 14, 28, and 56 after treatment. Repeated-measures analysis of variance and Friedman’s test with post-hoc statistical analysis were used to evaluate biomolecular changes (HIF-1α concentration, LDH, and MDH activities) in both groups.

RESULTS A total of 14 subjects (28 eyes) were enrolled in each group. In new wearers, there was a significant decrease in MDH level (p = 0.010) and no effect on HIF-1α level. In long-term wearers, HIF-1α and LDH levels tended to decrease (p = 0.054). A significant decrease on MDH level was noted on days 7 (p = 0.003), 14 (p = 0.026), and 28 (p<0.010). Long-term wearers had a higher LDH baseline level than new wearers (p = 0.04).

CONCLUSIONS Corneal hypoxia was not proven after 2 months of SCL wear using biomarkers. However, LDH and MDH activities in tears were found to be decline after SCL discontinuation.


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How to Cite
Rahayu T, Gondhowiardjo TD, Artini W, Wanandi SI. Tear hypoxia-inducible factor-1α expression, lactate dehydrogenase, and malate dehydrogenase activity changes in soft contact lens wear. Med J Indones [Internet]. 2020Dec.29 [cited 2021Jan.26];29(4):372-8. Available from: https://mji.ui.ac.id/journal/index.php/mji/article/view/3405
Clinical Research