Orthopedic surgeries to reconstruct and replace joints are increasingly in demand due to an aging population and improvements in materials and techniques. However, postsurgical infections are also of increasing concerns and are difficult to treat, often requiring revision surgeries that add to patient suffering and medical costs. This problem is particularly acute in shoulder arthroplasty, where robust aseptic protocols are not effective in preventing infections due to Cutibacterium (formerly Propionibacterium) acnes, an opportunistic pathogen enriched in sebum-rich sebaceous follicles that are found in abundance in the shoulder area. Dermalytica is developing first-in-class antimicrobials that target pathogenic bacteria without impacting healthy microbiota. A novel and diverse class of mycobacteriophage-encoded lytic enzymes can selectively and rapidly lyse C. acnes, the bacterial culprit in acne. Dermalytica is developing these lytic enzymes as selective topical antimicrobials that can penetrate sebaceous follicles as acne treatments, and the target product profile is similar to that for prevention of shoulder arthroplasty postsurgical infections. We propose to obtain proof-of-concept data on screening a panel of diverse lytic enzymes for their ability to kill a broad range of C. acnes clinical isolates obtained from shoulder surgeries that have been fully sequenced and molecularly characterized. Success in the proposed studies will enable a comprehensive screen for suitable candidates to undergo preclinical development as a first-in- class prophylactic antimicrobial to prevent shoulder arthroplasty infections and address this acute unmet medical need.

Public Health Relevance

Dermalytica aims to develop a first-in-class topical antimicrobial that can rapidly kill Cutibacterium acnes, the main bacterium found in shoulder arthroplasty infections, to be applied prior and during surgery to reduce the risk of postsurgical infections. This proposal will determine the feasibility of screening a panel of a novel and diverse class of phage-encoded lytic enzymes for their ability to kill a broad range of C. acnes clinical isolates from shoulder surgeries. Success in these studies will enable a comprehensive screen for suitable candidates for further preclinical development as a first-in-class prophylactic topical antimicrobial to address this major unmet medical need in shoulder arthroplasty postsurgical infections.

Agency
National Institute of Health (NIH)
Institute
National Institute of Allergy and Infectious Diseases (NIAID)
Type
Small Business Innovation Research Grants (SBIR) - Phase I (R43)
Project #
1R43AI149848-01A1
Application #
10080363
Study Section
Special Emphasis Panel (ZRG1)
Program Officer
Xu, Zuoyu
Project Start
2020-05-14
Project End
2021-01-31
Budget Start
2020-05-14
Budget End
2021-01-31
Support Year
1
Fiscal Year
2020
Total Cost
Indirect Cost
Name
Dermalytica, Inc.
Department
Type
DUNS #
079566359
City
Beverly
State
MA
Country
United States
Zip Code
01915