Abstract
Diabetic foot ulcers (DFUs) are a debilitating complication of diabetes in which bacterial presence, including the frequent colonizer Staphylococcus aureus, contributes to inhibition of healing. MicroRNAs (miRs) play a role in healing and host response to bacterial pathogens. However, the mechanisms by which miR response to cutaneous S. aureus contributes to DFU pathophysiology are unknown. Here, we show that S. aureus inhibits wound closure and induces miR-15b-5p in acute human and porcine wound models and in chronic DFUs. Transcriptome analyses of DFU tissue showed induction of miR-15b-5p to be critical, regulating many cellular processes, including DNA repair and inflammatory response, by suppressing downstream targets IKBKB, WEE1, FGF2, RAD50, MSH2, and KIT. Using a human wound model, we confirmed that S. aureus-triggered miR-15b-5p induction results in suppression of the inflammatory- and DNA repair-related genes IKBKB and WEE1. Inhibition of DNA repair and accumulation of DNA breaks was functionally confirmed by the presence of the pH2AX within colonized DFUs. We conclude that S. aureus induces miR-15b-5p, subsequently repressing DNA repair and inflammatory response, showing a mechanism of inhibition of healing in DFUs previously unreported, to our knowledge. This underscores a previously unknown role of DNA damage repair in the pathophysiology of DFUs colonized with S. aureus.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1187-1196 |
| Number of pages | 10 |
| Journal | Journal of Investigative Dermatology |
| Volume | 138 |
| Issue number | 5 |
| DOIs | |
| State | Published - May 1 2018 |
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ASJC Scopus subject areas
- Biochemistry
- Molecular Biology
- Dermatology
- Cell Biology
Cite this
Staphylococcus aureus Triggers Induction of miR-15B-5P to Diminish DNA Repair and Deregulate Inflammatory Response in Diabetic Foot Ulcers. / Ramirez, Horacio A.; Pastar, Irena; Jozic, Ivan; Stojadinovic, Olivera; Stone, Rivka C.; Ojeh, Nkemcho; Gil Rodriguez, Joel; Davis, Stephen C; Kirsner, Robert; Tomic-Canic, Marjana.
In: Journal of Investigative Dermatology, Vol. 138, No. 5, 01.05.2018, p. 1187-1196.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Staphylococcus aureus Triggers Induction of miR-15B-5P to Diminish DNA Repair and Deregulate Inflammatory Response in Diabetic Foot Ulcers
AU - Ramirez, Horacio A.
AU - Pastar, Irena
AU - Jozic, Ivan
AU - Stojadinovic, Olivera
AU - Stone, Rivka C.
AU - Ojeh, Nkemcho
AU - Gil Rodriguez, Joel
AU - Davis, Stephen C
AU - Kirsner, Robert
AU - Tomic-Canic, Marjana
PY - 2018/5/1
Y1 - 2018/5/1
N2 - Diabetic foot ulcers (DFUs) are a debilitating complication of diabetes in which bacterial presence, including the frequent colonizer Staphylococcus aureus, contributes to inhibition of healing. MicroRNAs (miRs) play a role in healing and host response to bacterial pathogens. However, the mechanisms by which miR response to cutaneous S. aureus contributes to DFU pathophysiology are unknown. Here, we show that S. aureus inhibits wound closure and induces miR-15b-5p in acute human and porcine wound models and in chronic DFUs. Transcriptome analyses of DFU tissue showed induction of miR-15b-5p to be critical, regulating many cellular processes, including DNA repair and inflammatory response, by suppressing downstream targets IKBKB, WEE1, FGF2, RAD50, MSH2, and KIT. Using a human wound model, we confirmed that S. aureus-triggered miR-15b-5p induction results in suppression of the inflammatory- and DNA repair-related genes IKBKB and WEE1. Inhibition of DNA repair and accumulation of DNA breaks was functionally confirmed by the presence of the pH2AX within colonized DFUs. We conclude that S. aureus induces miR-15b-5p, subsequently repressing DNA repair and inflammatory response, showing a mechanism of inhibition of healing in DFUs previously unreported, to our knowledge. This underscores a previously unknown role of DNA damage repair in the pathophysiology of DFUs colonized with S. aureus.
AB - Diabetic foot ulcers (DFUs) are a debilitating complication of diabetes in which bacterial presence, including the frequent colonizer Staphylococcus aureus, contributes to inhibition of healing. MicroRNAs (miRs) play a role in healing and host response to bacterial pathogens. However, the mechanisms by which miR response to cutaneous S. aureus contributes to DFU pathophysiology are unknown. Here, we show that S. aureus inhibits wound closure and induces miR-15b-5p in acute human and porcine wound models and in chronic DFUs. Transcriptome analyses of DFU tissue showed induction of miR-15b-5p to be critical, regulating many cellular processes, including DNA repair and inflammatory response, by suppressing downstream targets IKBKB, WEE1, FGF2, RAD50, MSH2, and KIT. Using a human wound model, we confirmed that S. aureus-triggered miR-15b-5p induction results in suppression of the inflammatory- and DNA repair-related genes IKBKB and WEE1. Inhibition of DNA repair and accumulation of DNA breaks was functionally confirmed by the presence of the pH2AX within colonized DFUs. We conclude that S. aureus induces miR-15b-5p, subsequently repressing DNA repair and inflammatory response, showing a mechanism of inhibition of healing in DFUs previously unreported, to our knowledge. This underscores a previously unknown role of DNA damage repair in the pathophysiology of DFUs colonized with S. aureus.
UR - http://www.scopus.com/inward/record.url?scp=85044348261&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85044348261&partnerID=8YFLogxK
U2 - 10.1016/j.jid.2017.11.038
DO - 10.1016/j.jid.2017.11.038
M3 - Article
VL - 138
SP - 1187
EP - 1196
JO - Journal of Investigative Dermatology
JF - Journal of Investigative Dermatology
SN - 0022-202X
IS - 5
ER -