| Tenascin and cytokines in tear fluid after photorefractive keratectomy. | |
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MedLine Citation:
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PMID: 9699169 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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BACKGROUND: Basic knowledge of the substances involved in wound healing after photorefractive keratectomy (PRK) is essential for development of pharmacological intervention. We present preoperative and postoperative analysis of tear fluid extracellular matrix proteins and cytokines after PRK. METHODS: Tear fluid samples from 70 patients (72 eyes) who had PRK (38 women and 32 men, mean age 31.5 yr) were studied. Samples from 18 patients (18 eyes) were analyzed in two different studies. RESULTS: Mean preoperative tear fluid flow in the collection capillary (volume divided by tear collection time) varied from 4.5 to 22.5 microliters/min in five series of patients. It increased significantly during the first two postoperative days (range of means, 55.5 to 88.8 microliters/min, p < 0.01), and decreased to the preoperative level by day 7 (range of means, 9.7 to 18.2 microliters/min). The tenascin and cytokine release rates increased significantly during the first two days after PRK and returned to the preoperative level by day 7. Mean +/- standard error for tenascin: day 0 (5.2 +/- 1.9 ng/min); day 2 (22.7 +/- 6.1 ng/min; p = 0.02). Mean +/- standard error for HGF: day 0 (3.2 +/- 0.7 pg/min); day 1 (22.8 +/- 4.2 pg/min; p = 0.0003). Mean +/- standard error for TGF-beta 1: day 0 (63.3 +/- 19.6 pg/min); days 1-2 (826.2 +/- 253.7 pg/min; p = 0.001). Mean +/- standard error for VEGF: day 0 (166.0 +/- 29.6 pg/min); days 1-2 (824.4 +/- 165.1 pg/min; p = 0.0007). Mean +/- standard error for PDGF-BB: day 0 (0.42 +/- 0.19 pg/min); day 2 (27.6 +/- 5.8 pg/min; p = 0.0000). Mean +/- standard error for TNF-alpha: day 0 (9.5 +/- 2.6 pg/min); day 2 (28.6 +/- 5.9 pg/min; p = 0.003). Excluding PDGF-BB, all substances studied were present in normal human tear fluid. PDGF-BB was present in only 17% of the preoperative samples. CONCLUSION: Corneal wounding induces an increased release of several growth modulating cytokines which may be involved in healing processes. |
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Authors:
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M H Vesaluoma; T T Tervo |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of refractive surgery (Thorofare, N.J. : 1995) Volume: 14 ISSN: 1081-597X ISO Abbreviation: J Refract Surg Publication Date: 1998 Jul-Aug |
Date Detail:
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Created Date: 1998-10-01 Completed Date: 1998-10-01 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 9505927 Medline TA: J Refract Surg Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 447-54 Citation Subset: IM |
Affiliation:
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Helsinki University, Eye Hospital, Finland. minna.vesaluoma@huch.fi |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adolescent Adult Cornea / surgery* Female Growth Substances / metabolism* Humans Immunoassay Lasers, Excimer Male Middle Aged Photorefractive Keratectomy* Refractive Surgical Procedures* Tears / metabolism* Tenascin / metabolism* Time Factors Wound Healing |
| Chemical | |
Reg. No./Substance:
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0/Growth Substances; 0/Tenascin |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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