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Schoepp NG, Khorosheva EM, Schlappi TS, Curtis MS, Humphries RM, Hindler JA, Ismagilov RF. Digital Quantification of DNA Replication and Chromosome Segregation Enables Determination of Antimicrobial Susceptibility after only 15 Minutes of Antibiotic Exposure. Angew Chem Int Ed Engl 2016; 55:9557-61. [PMID: 27357747 PMCID: PMC5215780 DOI: 10.1002/anie.201602763] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2016] [Revised: 05/05/2016] [Indexed: 01/11/2023]
Abstract
Rapid antimicrobial susceptibility testing (AST) would decrease misuse and overuse of antibiotics. The "holy grail" of AST is a phenotype-based test that can be performed within a doctor visit. Such a test requires the ability to determine a pathogen's susceptibility after only a short antibiotic exposure. Herein, digital PCR (dPCR) was employed to test whether measuring DNA replication of the target pathogen through digital single-molecule counting would shorten the required time of antibiotic exposure. Partitioning bacterial chromosomal DNA into many small volumes during dPCR enabled AST results after short exposure times by 1) precise quantification and 2) a measurement of how antibiotics affect the states of macromolecular assembly of bacterial chromosomes. This digital AST (dAST) determined susceptibility of clinical isolates from urinary tract infections (UTIs) after 15 min of exposure for all four antibiotic classes relevant to UTIs. This work lays the foundation to develop a rapid, point-of-care AST and strengthen global antibiotic stewardship.
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Affiliation(s)
- Nathan G Schoepp
- Division of Chemistry and Chemical Engineering, California Institute of Technology, 1200 E. California Blvd., Pasadena, CA, 91125, USA
| | - Eugenia M Khorosheva
- Division of Chemistry and Chemical Engineering, California Institute of Technology, 1200 E. California Blvd., Pasadena, CA, 91125, USA
| | - Travis S Schlappi
- Division of Chemistry and Chemical Engineering, California Institute of Technology, 1200 E. California Blvd., Pasadena, CA, 91125, USA
| | - Matthew S Curtis
- Division of Chemistry and Chemical Engineering, California Institute of Technology, 1200 E. California Blvd., Pasadena, CA, 91125, USA
| | - Romney M Humphries
- Pathology and Laboratory Medicine, University of California, Los Angeles, 10888 Le Conte Avenue, Brentwood Annex, Los Angeles, CA, 90095, USA
| | - Janet A Hindler
- Pathology and Laboratory Medicine, University of California, Los Angeles, 10888 Le Conte Avenue, Brentwood Annex, Los Angeles, CA, 90095, USA
| | - Rustem F Ismagilov
- Division of Chemistry and Chemical Engineering, California Institute of Technology, 1200 E. California Blvd., Pasadena, CA, 91125, USA.
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Schoepp NG, Khorosheva EM, Schlappi TS, Curtis MS, Humphries RM, Hindler JA, Ismagilov RF. Digital Quantification of DNA Replication and Chromosome Segregation Enables Determination of Antimicrobial Susceptibility after only 15 Minutes of Antibiotic Exposure. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201602763] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Nathan G. Schoepp
- Division of Chemistry and Chemical Engineering; California Institute of Technology; 1200 E. California Blvd. Pasadena CA 91125 USA
| | - Eugenia M. Khorosheva
- Division of Chemistry and Chemical Engineering; California Institute of Technology; 1200 E. California Blvd. Pasadena CA 91125 USA
| | - Travis S. Schlappi
- Division of Chemistry and Chemical Engineering; California Institute of Technology; 1200 E. California Blvd. Pasadena CA 91125 USA
| | - Matthew S. Curtis
- Division of Chemistry and Chemical Engineering; California Institute of Technology; 1200 E. California Blvd. Pasadena CA 91125 USA
| | - Romney M. Humphries
- Pathology and Laboratory Medicine; University of California, Los Angeles; 10888 Le Conte Avenue, Brentwood Annex Los Angeles CA 90095 USA
| | - Janet A. Hindler
- Pathology and Laboratory Medicine; University of California, Los Angeles; 10888 Le Conte Avenue, Brentwood Annex Los Angeles CA 90095 USA
| | - Rustem F. Ismagilov
- Division of Chemistry and Chemical Engineering; California Institute of Technology; 1200 E. California Blvd. Pasadena CA 91125 USA
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Scott MD, Dutta R, Haldar MK, Wagh A, Gustad TR, Law B, Friesner DL, Mallik S. Fluorescent polymer-based post-translational differentiation and subtyping of breast cancer cells. Analyst 2012; 137:5487-90. [PMID: 23061092 DOI: 10.1039/c2an35877h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Herein, we report the application of synthesized fluorescent, water soluble polymers for post-translational subtyping and differentiation of breast cancer cells in vitro. The fluorescence emission spectra from these polymers were modulated differently in the presence of conditioned cell culture media from various breast cancer cells. These polymers differentiate at a post-translation level possibly due to their ability to interact with extracellular enzymes that are over-expressed in cancerous conditions.
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Affiliation(s)
- Michael D Scott
- Department of Pharmaceutical Sciences, North Dakota State University, Fargo, North Dakota 58108-6050, USA.
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Holzgrabe U. [FRET (Fluorescence Resonance Energy Transfer) for the determination of minimal inhibitory concentration of antibiotics]. PHARMAZIE IN UNSERER ZEIT 2012; 41:6-7. [PMID: 22470911 DOI: 10.1002/pauz.201290004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
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