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Unterschiedliche Konzentrationen an vasoaktivem intestinalen Polypeptid im Kammerwasser von Katarakt- und PVR-Patienten

Different concentrations of vasoactive intestinal polypeptide in aqueous humor of patients with proliferative vitreoretinopathy and cataract patients

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Zusammenfassung

Die pathophysiologischen Mechanismen, die zur zellulären Proliferation bei der proliferativen Vitreoretinopathie führen, sind weitgehend unbekannt. Eine mögliche Beteiligung von Neuropeptiden wird diskutiert, zumal die Konzentration an Substanz P in intraokulärer Flüssigkeit der betroffenen Patienten deutlich erhöht ist. In dieser Studie wurde ein weiteres Neuropeptid im Kammerwasser untersucht, nämlich vasoaktives intestinales Polypeptid. Die Bestimmung mittels Radioimmunoassay ergab eine signifikant erhöhte Konzentration dieses Peptids im Kammerwasser von Patienten mit proliferativer Vitreoretinopathie verglichen mit Kataraktpatienten, die als Kontrollen dienten. Zumal vasoaktives intestinales Polypeptid die Proliferation von retinalen Pigmentepithelzellen des Huhns in der Zellkultur induziert, könnte dieses Peptid in die Mechanismen involviert sein, die zur zellulären Proliferation bei der proliferativen Vitreoretinopathie führen.

Summary

The pathophysiological events leading to cellular proliferation in proliferative vitreoretinopathy are largely unknown. An involvement of neuropeptides in that disease has recently been discussed, as substance P was found to be highly enriched in the intraocular fluid of patients with proliferative vitreoretinopathy. In the present study, aqueous humor was analyzed for another neuropeptide, vasoactive intestinal polypeptide. Radioimmunoassay revealed significantly increased levels of that polypeptide in the aqueous humor of patients with proliferative vitreoretinopathy as compared with cataract patients who served as controls. As vasoactive intestinal polypeptide contributes to the environment of the retinal pigment epithelial cell layer and induces proliferation of these cells in vitro, this peptide may be involved in the pathogenetic mechanisms leading to cellular proliferation in proliferative vitreoretinopathy.

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Troger, J., Metzler, R., Göttinger, W. et al. Unterschiedliche Konzentrationen an vasoaktivem intestinalen Polypeptid im Kammerwasser von Katarakt- und PVR-Patienten. Spektrum Augeheilkd 10, 63–65 (1996). https://doi.org/10.1007/BF03164178

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