Scopus
🔓 Açık Erişim YÖKSİS Eşleşti
Autoinhibitory Feedback Control over Photodynamic Action
ACS Omega · Temmuz 2019
YÖKSİS Kayıtları
Autoinhibitory Feedback Control over Photodynamic Action
ACS Omega · 2019 SCI
DOÇENT GÜLSÜM ABUŞOĞLU →
Autoinhibitory Feedback Control over Photodynamic Action
ACS Omega · 2019 SCI
PROFESÖR SERDAR KARAKURT →
Makale Bilgileri
DergiACS Omega
Yayın TarihiTemmuz 2019
Cilt / Sayfa4 · 12293-12299
Scopus ID2-s2.0-85078793042
Erişim🔓 Açık Erişim
Özet
In biology, the activity of enzymes is usually regulated by feedback loops, which enables direct communication between enzymes and the state of the cell. In a similar manner, with the intention to have automated activity regulation, the therapeutic effect of a photosensitizer (BOD1) is shown to be reduced through a negative feedback loop initiated by the photosensitizer. Photodynamic action produces cytotoxic 1O2 and this reactive oxygen species reacts with ascorbate, generating H2O2. Peroxide-mediated oxidation of the photosensitizer auxiliary group leads to the formation of inactive BOD2 from the parent photosensitizer. BOD1 is shown to accumulate in mitochondria, and cell viability is shown to decrease significantly with BOD1 compared to the loop end product, BOD2. Photoinduced enhancement of fluorescence indicates the formation of inactive BOD2 under cellular conditions, and enhanced fluorescence acts as a reporter for the activity of the photosensitizer. We present the first example of PDT autoinactivation, and such a feedback control mechanism would enable a decrease in post-therapy side effects.
Yazarlar (5)
1
Mediha Nur Zafer Yurt
2
Yusuf Cakmak
3
G. Tekin
4
Serdar Karakurt
5
Sundus Erbas-Cakmak
Kurumlar
Konya Gida ve Tarim Üniversitesi
Konya Turkey
Selçuk Üniversitesi
Selçuklu Turkey
Metrikler
10
Atıf
5
Yazar