Objective: The role of norepinephrine (NE) on growth, adhesion and invasion of methicillin-resistant Staphylococcus aureus (MRSA) ATTC 43300 was examined in human osteoblast (HOB) cells. The effects of NE and/or MRSA on the viability and cell death pathways of HOB cells were also investigated. Furthermore, the alterations of bacterial response to oxidative stress (H2O2) were analyzed in the presence/absence of NE.
Materials and Methods: Bacterial growth was detected spectrophotometrically. The colony counting method was examined for adhesion-invasion. The alteration of HOB cell viability was determined by methyl thiazolyl diphenyl-tetrazolium bromide (MTT) assay. The death pathways of HOB cells were examined microscopically using acridine orange-ethidium bromide dual staining and dichlorofluorescein-diacetate (DCF-DA) dye. The bacterial response to H2O2 was investigated by agar dilution.
Results: The growth of bacterium was not affected in the presence of NE. Bacterial adhesion was decreased by NE (p<0.0001) while high-level NE induced invasion (p=0.013). HOB cell viability was reduced by MRSA and/or NE (p<0.001). MRSA and co-existence of MRSA and NE caused necrosis more than apoptosis in HOB cells (p<0.05). NE did not alter the bacterial response to oxidative stress.
Conclusion: Norepinephrine has different effects on the biological properties of both MRSA and HOB cells.
Norepinephrine MRSA growth adhesion-invasion oxidative stress response HOB cell viability apoptosis-necrosis
Birincil Dil | İngilizce |
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Konular | Klinik Tıp Bilimleri |
Bölüm | Araştırma Makalesi |
Yazarlar | |
Yayımlanma Tarihi | 22 Ağustos 2022 |
Gönderilme Tarihi | 31 Mayıs 2022 |
Yayımlandığı Sayı | Yıl 2022 Cilt: 12 Sayı: 2 |