Emmanuela Adjei-Sowah

Ms. Emmanuela Adjei-Sowah

University of Rochester

Research Focus & Metrics

Academic Career Length

6Years (2021-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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17 June 2021 in Antibiotics
Verified
Journal Article
Open access
PDF file
Emmanuela Adjei-SowahEmmanuela Adjei-Sowah
Emmanuela Adjei-Sowah
YPYue Peng
Yue Peng
JWJason Weeks
Jason Weeks
JJJennifer H. Jonason
Jennifer H. Jonason
KBKaren Bentley
Karen Bentley
CXChao Xie
Chao Xie
The use of local antibiotics to treat bone infections has been questioned due to a lack of clinical efficacy and emerging information about Staphylococcus aureus colonization of the osteocyte-lacuno canalicular network (OLCN). Here we propose bisphosphonate-conjugated antibiotics (BCA) using a “target and release” approach to deliver antibiotics to bone infection sites. A fluorescent bisphosphonate probe was used to demonstrate bone surface labeling adjacent to bacteria in a S. aureus infected mouse tibiae model. Bisphosphonate and hydroxybisphosphonate conjugates of sitafloxacin and tedizolid (BCA) were synthesized using hydroxyphenyl and aminophenyl carbamate linkers, respectively. The conjugates were adequately stable in serum. Their cytolytic activity versus parent drug on MSSA and MRSA static biofilms grown on hydroxyapatite discs was established by scanning electron microscopy. Sitafloxacin O-phenyl carbamate BCA was effective in eradicating static biofilm: no colony formation units (CFU) were recovered following treatment with 800 mg/L of either the bisphosphonate or α-hydroxybisphosphonate conjugated drug (p < 0.001). In contrast, the less labile tedizolid N-phenyl carbamate linked BCA had limited efficacy against MSSA, and MRSA. CFU were recovered from all tedizolid BCA treatments. These results demonstrate the feasibility of BCA eradication of S. aureus biofilm on OLCN bone surfaces and support in vivo drug development of a sitafloxacin BCA.

5 January 2021 in Annals of Biomedical Engineering
Verified
Journal Article
Closed access
PDF file
FAFarbod Amirghasemi
Farbod Amirghasemi
Emmanuela Adjei-SowahEmmanuela Adjei-Sowah
Emmanuela Adjei-Sowah
BPBarbara A. Pockaj
Barbara A. Pockaj
MNMehdi Nikkhah
Mehdi Nikkhah