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Sandala JL, Eichar BW, Kuo LG, Hahn MM, Basak AK, Huggins WM, Woolard K, Melander C, Gunn JS. A dual-therapy approach for the treatment of biofilm-mediated Salmonella gallbladder carriage. PLoS Pathog 2020; 16:e1009192. [PMID: 33370414 PMCID: PMC7793255 DOI: 10.1371/journal.ppat.1009192] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Revised: 01/08/2021] [Accepted: 11/29/2020] [Indexed: 01/12/2023] Open
Abstract
Asymptomatic carriage of Salmonella Typhi continues to facilitate the transmission of typhoid fever, resulting in 14 million new infections and 136,000 fatalities each year. Asymptomatic chronic carriage of S. Typhi is facilitated by the formation of biofilms on gallstones that protect the bacteria from environmental insults and immune system clearance. Here, we identified two unique small molecules capable of both inhibiting Salmonella biofilm growth and disrupting pre-formed biofilm structures without affecting bacterial viability. In a mouse model of chronic gallbladder Salmonella carriage, treatment with either compound reduced bacterial burden in the gallbladder by 1–2 logs resulting in bacterial dissemination to peripheral organs that was associated with increased mortality. Co-administration of either compound with ciprofloxacin not only enhanced compound efficacy in the gallbladder by a further 1–1.5 logs for a total of 3–4.5 log reduction, but also prevented bacterial dissemination to peripheral organs. These data suggest a dual-therapy approach targeting both biofilm and planktonic populations can be further developed as a safe and efficient treatment of biofilm-mediated chronic S. Typhi infections. Typhoid fever is an infectious disease caused by Salmonella Typhi (S. Typhi), a bacterium that causes as many as 14 million new infections and 136,000 deaths annually. Asymptomatic chronic carriers of S. Typhi play a major role in the transmission of typhoid fever, as they intermittently shed the bacteria and can unknowingly infect surrounding individuals. Here, we characterized novel compounds that target biofilm formation, a process utilized by S. Typhi to establish and maintain chronic carriage in the gallbladder, in hopes that they may be eventually used in conjunction with traditional antibiotics to prevent and/or cure chronic infections more efficiently than antibiotics alone.
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Affiliation(s)
- Jenna L. Sandala
- Center for Microbial Pathogenesis, Abigail Wexner Research Institute at Nationwide Children’s Hospital, Columbus, Ohio, United States of America
- Department of Microbial Infection and Immunity, The Ohio State University College of Medicine, Columbus, Ohio, United States of America
- Infectious Diseases Institute, The Ohio State University, Columbus, Ohio, United States of America
| | - Bradley W. Eichar
- Department of Microbial Infection and Immunity, The Ohio State University College of Medicine, Columbus, Ohio, United States of America
| | - Laura G. Kuo
- Department of Microbial Infection and Immunity, The Ohio State University College of Medicine, Columbus, Ohio, United States of America
| | - Mark M. Hahn
- Center for Microbial Pathogenesis, Abigail Wexner Research Institute at Nationwide Children’s Hospital, Columbus, Ohio, United States of America
- Department of Microbial Infection and Immunity, The Ohio State University College of Medicine, Columbus, Ohio, United States of America
- Infectious Diseases Institute, The Ohio State University, Columbus, Ohio, United States of America
| | - Akash K. Basak
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana, United States of America
| | - William M. Huggins
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina, United States of America
| | - Katherine Woolard
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana, United States of America
| | - Christian Melander
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana, United States of America
| | - John S. Gunn
- Center for Microbial Pathogenesis, Abigail Wexner Research Institute at Nationwide Children’s Hospital, Columbus, Ohio, United States of America
- Department of Microbial Infection and Immunity, The Ohio State University College of Medicine, Columbus, Ohio, United States of America
- Infectious Diseases Institute, The Ohio State University, Columbus, Ohio, United States of America
- Department of Pediatrics, The Ohio State University College of Medicine, Columbus, Ohio, United States of America
- * E-mail:
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Brackett SM, Cox KE, Barlock SL, Huggins WM, Ackart DF, Bassaraba RJ, Melander RJ, Melander C. Meridianin D analogues possess antibiofilm activity against Mycobacterium smegmatis. RSC Med Chem 2020; 11:92-97. [PMID: 33479607 PMCID: PMC7523022 DOI: 10.1039/c9md00466a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Accepted: 10/29/2019] [Indexed: 11/21/2022] Open
Abstract
The formation of bacterial biofilms significantly decreases the efficacy of antibiotic treatments. Herein, we've investigated the antibiofilm properties of the natural product meridianin D and a library of analogues against Mycobacterium smegmatis. As a result, we discovered several analogues that both inhibit and disperse M. smegmatis biofilms.
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Affiliation(s)
- Sara M Brackett
- Department of Chemistry and Biochemistry , University of Notre Dame , Notre Dame , IN 46556 , USA .
| | - Karlie E Cox
- Department of Chemistry and Biochemistry , University of Notre Dame , Notre Dame , IN 46556 , USA .
| | - Samantha L Barlock
- Department of Chemistry and Biochemistry , University of Notre Dame , Notre Dame , IN 46556 , USA .
| | - William M Huggins
- Department of Chemistry , North Carolina State University , Raleigh , NC 27695 , USA
| | - David F Ackart
- Department of Microbiology, Immunology, and Pathology , Colorado State University , Fort Collins , CO 80523 , USA
| | - Randall J Bassaraba
- Department of Microbiology, Immunology, and Pathology , Colorado State University , Fort Collins , CO 80523 , USA
| | - Roberta J Melander
- Department of Chemistry and Biochemistry , University of Notre Dame , Notre Dame , IN 46556 , USA .
| | - Christian Melander
- Department of Chemistry and Biochemistry , University of Notre Dame , Notre Dame , IN 46556 , USA .
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Huggins WM, Vu Nguyen T, Hahn NA, Baker JT, Kuo LG, Kaur D, Melander RJ, Gunn JS, Melander C. 2-Aminobenzimidazoles as antibiofilm agents against Salmonella enterica serovar Typhimurium. Medchemcomm 2018; 9:1547-1552. [PMID: 30288228 DOI: 10.1039/c8md00298c] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Accepted: 07/31/2018] [Indexed: 12/11/2022]
Abstract
Serovars within the species Salmonella enterica are some of the most common food and water-borne pathogens worldwide. Some S. enterica serovars have shown a remarkable ability to persist both inside and outside the human body. Salmonella enterica serovar Typhi can cause chronic, asymptomatic infection of the human gallbladder. This organism's ability to survive inside the gallbladder centers around its ability to form biofilms on gallstone surfaces. Currently, chronic carriage of S. Typhi is treated by invasive methods, which are not well suited to areas where Salmonella carriage is prevalent. Herein, we report 2-aminobenzimidazoles that inhibit S. enterica serovar Typhimurium (a surrogate for S. Typhi) biofilm formation in low micromolar concentrations. Modifications to the head, tail, and linker regions of the original hit compound elucidated new, more effective analogues that inhibit S. Typhimurium biofilm formation while being non-toxic to planktonic bacterial growth.
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Affiliation(s)
- William M Huggins
- Department of Chemistry , North Carolina State University , 2620 Yarbrough Drive , Raleigh , North Carolina 27695 , USA . ; Tel: +1 919 513 2960
| | - T Vu Nguyen
- Department of Chemistry , North Carolina State University , 2620 Yarbrough Drive , Raleigh , North Carolina 27695 , USA . ; Tel: +1 919 513 2960
| | - Nicholas A Hahn
- Department of Chemistry , North Carolina State University , 2620 Yarbrough Drive , Raleigh , North Carolina 27695 , USA . ; Tel: +1 919 513 2960
| | - James T Baker
- Department of Chemistry , North Carolina State University , 2620 Yarbrough Drive , Raleigh , North Carolina 27695 , USA . ; Tel: +1 919 513 2960
| | - Laura G Kuo
- Department of Microbial Infection and Immunity , Infectious Diseases Institute , The Ohio State University , Columbus , Ohio , USA
| | - Darpan Kaur
- Department of Microbial Infection and Immunity , Infectious Diseases Institute , The Ohio State University , Columbus , Ohio , USA
| | - Roberta J Melander
- Department of Chemistry , North Carolina State University , 2620 Yarbrough Drive , Raleigh , North Carolina 27695 , USA . ; Tel: +1 919 513 2960
| | - John S Gunn
- Department of Microbial Infection and Immunity , Infectious Diseases Institute , The Ohio State University , Columbus , Ohio , USA
| | - Christian Melander
- Department of Chemistry , North Carolina State University , 2620 Yarbrough Drive , Raleigh , North Carolina 27695 , USA . ; Tel: +1 919 513 2960
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Huggins WM, Barker WT, Baker JT, Hahn NA, Melander RJ, Melander C. Meridianin D Analogues Display Antibiofilm Activity against MRSA and Increase Colistin Efficacy in Gram-Negative Bacteria. ACS Med Chem Lett 2018; 9:702-707. [PMID: 30034604 DOI: 10.1021/acsmedchemlett.8b00161] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Accepted: 05/25/2018] [Indexed: 01/31/2023] Open
Abstract
In the last 30 years, development of new classes of antibiotics has slowed, increasing the necessity for new options to treat multidrug resistant bacterial infections. Development of antibiotic adjuvants that increase the effectiveness of currently available antibiotics is a promising alternative approach to classical antibiotic development. Reports of the ability of the natural product meridianin D to modulate bacterial behavior have been rare. Herein, we describe the ability of meridianin D to inhibit biofilm formation of methicillin-resistant Staphylococcus aureus (MRSA) and to increase the potency of colistin against colistin-resistant and sensitive Gram-negative bacteria. Analogues were identified that are capable of inhibiting and dispersing MRSA biofilms and lowering the colistin MIC to below the CLSI breakpoint against Acinetobacter baumannii, Klebsiella pneumoniae, and Escherichia coli.
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Affiliation(s)
- William M. Huggins
- Department of Chemistry, North Carolina State University, 2620 Yarbrough Drive, Raleigh, North Carolina 27695, United States
| | - William T. Barker
- Department of Chemistry, North Carolina State University, 2620 Yarbrough Drive, Raleigh, North Carolina 27695, United States
| | - James T. Baker
- Department of Chemistry, North Carolina State University, 2620 Yarbrough Drive, Raleigh, North Carolina 27695, United States
| | - Nicholas A. Hahn
- Department of Chemistry, North Carolina State University, 2620 Yarbrough Drive, Raleigh, North Carolina 27695, United States
| | - Roberta J. Melander
- Department of Chemistry, North Carolina State University, 2620 Yarbrough Drive, Raleigh, North Carolina 27695, United States
| | - Christian Melander
- Department of Chemistry, North Carolina State University, 2620 Yarbrough Drive, Raleigh, North Carolina 27695, United States
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Corey BW, Thompson MG, Hittle LE, Jacobs AC, Asafo-Adjei EA, Huggins WM, Melander RJ, Melander C, Ernst RK, Zurawski DV. 1,2,4-Triazolidine-3-thiones Have Specific Activity against Acinetobacter baumannii among Common Nosocomial Pathogens. ACS Infect Dis 2017; 3:62-71. [PMID: 27764938 DOI: 10.1021/acsinfecdis.6b00133] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Acinetobacter baumannii are Gram-negative bacilli that pose a constant threat to susceptible patients because of increased resistance to multiple antibiotics and persistence in the hospital environment. After genome analysis, we discovered that A. baumannii harbors genes that share homology to an enzymatic pathway that elongates long-chain fatty acids (LCFA) in fungi. Previously, 1,2,4-triazolidine-3-thiones (T-3-Ts) were shown to inhibit hyphae production in fungi, and this same LCFA elongation pathway was implicated as the possible target. Therefore, we investigated if T-3-Ts also have activity against multidrug-resistant A. baumannii. Surprisingly, all of the clinical isolates of A. baumannii that were tested have susceptibility to ECC145 and ECC188 with MIC90 values of 8.0 μg/mL. In contrast, reference strains and clinical isolates of other common nosocomial bacteria that lack the LCFA pathway also lacked susceptibility. Time-kill experiments revealed that both ECC145 and ECC188 have a bacteriostatic effect against A. baumannii. Mass spectrometry analysis suggested that exposure to T-3-Ts resulted in less LCFA production. Supplementation of media with either 0.02% w/v oleic or linoleic acid abrogated the bacteriostatic effect of the compounds, which again implicated LCFA elongation as the target. Our results suggest these molecules could be a promising start to further exploit what appears to be an important aspect of A. baumannii membrane function and integrity.
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Affiliation(s)
- Brendan W. Corey
- Wound Infections Department, Bacterial
Diseases Branch, Walter Reed Army Institute of Research, Silver Spring, Maryland 20910, United States
| | - Mitchell G. Thompson
- Wound Infections Department, Bacterial
Diseases Branch, Walter Reed Army Institute of Research, Silver Spring, Maryland 20910, United States
| | - Lauren E. Hittle
- Department of Microbial Pathogenesis, University of Maryland School of Dentistry, Baltimore, Maryland 21201, United States
| | - Anna C. Jacobs
- Wound Infections Department, Bacterial
Diseases Branch, Walter Reed Army Institute of Research, Silver Spring, Maryland 20910, United States
| | - Edward A. Asafo-Adjei
- Department of Veterinary Medicine, Walter Reed Army Institute of Research, Silver Spring, Maryland 20910, United States
| | - William M. Huggins
- Department
of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8024, United States
| | - Roberta J. Melander
- Department
of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8024, United States
| | - Christian Melander
- Department
of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8024, United States
| | - Robert K. Ernst
- Department of Microbial Pathogenesis, University of Maryland School of Dentistry, Baltimore, Maryland 21201, United States
| | - Daniel V. Zurawski
- Wound Infections Department, Bacterial
Diseases Branch, Walter Reed Army Institute of Research, Silver Spring, Maryland 20910, United States
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Huggins WM, Minrovic BM, Corey BW, Jacobs AC, Melander RJ, Sommer RD, Zurawski DV, Melander C. 1,2,4-Triazolidine-3-thiones as Narrow Spectrum Antibiotics against Multidrug-Resistant Acinetobacter baumannii. ACS Med Chem Lett 2017; 8:27-31. [PMID: 28105270 PMCID: PMC5238477 DOI: 10.1021/acsmedchemlett.6b00296] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Accepted: 10/31/2016] [Indexed: 01/29/2023] Open
Abstract
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With only two new classes of antibiotics
developed in the last
40 years, novel antibiotics are desperately needed to combat the growing
problem of multidrug-resistant and extensively drug resistant bacteria,
particularly Gram-negative bacteria. Described in this letter is the
synthesis and antibiotic activity of 1,2,4-triazolidine-3-thiones
as narrow spectrum antibiotics. Optimization of the 1,2,4-triazolidine-3-thione
scaffold identified a small molecule with potent antibiotic activity
against multiple strains of multidrug-resistant and extensively drug-resistant Acinetobacter baumannii. This small molecule also shows
single dose, in vivo activity in a Galleria
mellonella infection model with A. baumannii and represents a promising start in the development of a class of
drugs that can target this bacterial pathogen.
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Affiliation(s)
- William M. Huggins
- Department
of Chemistry, North Carolina State University, 2620 Yarbrough Drive, Raleigh, North Carolina 27695, United States
| | - Bradley M. Minrovic
- Department
of Chemistry, North Carolina State University, 2620 Yarbrough Drive, Raleigh, North Carolina 27695, United States
| | - Brendan W. Corey
- Wound
Infections Department, Walter Reed Army Institute of Research, Silver Spring, Maryland 20910, United States
| | - Anna C. Jacobs
- Wound
Infections Department, Walter Reed Army Institute of Research, Silver Spring, Maryland 20910, United States
| | - Roberta J. Melander
- Department
of Chemistry, North Carolina State University, 2620 Yarbrough Drive, Raleigh, North Carolina 27695, United States
| | - Roger D. Sommer
- Department
of Chemistry, North Carolina State University, 2620 Yarbrough Drive, Raleigh, North Carolina 27695, United States
| | - Daniel V. Zurawski
- Wound
Infections Department, Walter Reed Army Institute of Research, Silver Spring, Maryland 20910, United States
| | - Christian Melander
- Department
of Chemistry, North Carolina State University, 2620 Yarbrough Drive, Raleigh, North Carolina 27695, United States
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