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Umar NK, Kono M, Sakatani H, Murakami D, Onishi Y, Kamiyama T, Iyo T, Hijiya M, Shiga T, Kinoshita T, Tamagawa S, Hiraoka M, Ohtani M, Hotomi M. Respiratory quinolones can eradicate amoxicillin-induced mature biofilms and nontypeable Haemophilus influenzae in biofilms. J Infect Chemother 2022; 28:1595-1604. [PMID: 36002133 DOI: 10.1016/j.jiac.2022.07.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Revised: 06/23/2022] [Accepted: 07/28/2022] [Indexed: 10/15/2022]
Abstract
OBJECTIVES Biofilm is thought to be involved in the persistent bacterial infections caused by nontypeable Haemophilus influenzae (NTHi). This study aims to evaluate the efficacy of antibiotics against NTHi biofilms. METHODS A 96-wells pin replicator assay was applied for evaluation of antimicrobial efficacies against NTHi biofilms. The NTHi IH-202 strain for the standard and 10 clinical strains were evaluated, as well as the viability of NTHi in biofilms after antimicrobial exposures. RESULTS Biofilms formed by IH-202 strain accumulated during incubation. AMPC if not high concentrations, neither reduce or inhibit biofilm formation, nor eradicate matured NTHi biofilms. The NTHi in matured biofilm were alive after exposure to amoxicillin (AMPC). Even high concentration of AMPC produced live NTHi after suspension of exposure, while tosufloxacin and garenoxacin inhibited biofilm formation of NTHi and eradicated matured biofilms. The respiratory quinolones, but not AMPC, killed NTHi in biofilms even at sub-MIC. CONCLUSIONS NTHi persists in biofilms, even after exposure to AMPC. These findings may eventually lead to a better understanding of effective use of antibiotics to eradicate NTHi growing as biofilms, or even to the development of novel therapeutic agents for treating patients with mucosal NTHi biofilm infections. Meanwhile, respiratory quinolones are attractive agents in reducing NTHi biofilm formation and destroying established biofilm.
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Affiliation(s)
- Nafisa Khamis Umar
- Department of Otorhinolaryngology Head and Neck Surgery, Wakayama Medical University, 811-1 Kimiidera, Wakayama-shi, Wakayama, 641-5810, Japan
| | - Masamitsu Kono
- Department of Otorhinolaryngology Head and Neck Surgery, Wakayama Medical University, 811-1 Kimiidera, Wakayama-shi, Wakayama, 641-5810, Japan
| | - Hideki Sakatani
- Department of Otorhinolaryngology Head and Neck Surgery, Wakayama Medical University, 811-1 Kimiidera, Wakayama-shi, Wakayama, 641-5810, Japan
| | - Daichi Murakami
- Department of Otorhinolaryngology Head and Neck Surgery, Wakayama Medical University, 811-1 Kimiidera, Wakayama-shi, Wakayama, 641-5810, Japan; Department of Otorhinolaryngology Head and Neck Surgery, Kinan Hospital, 46-70 Shinjo-cho, Tanabe-shi, Wakayama, 646-8588, Japan
| | - Yoshimi Onishi
- FUJIFILM Toyama Chemical Co., Ltd., 14-1, Kyobashi 2-Chome, Chuo-Ku, Tokyo, 104-0031, Japan
| | - Tomoko Kamiyama
- FUJIFILM Toyama Chemical Co., Ltd., 14-1, Kyobashi 2-Chome, Chuo-Ku, Tokyo, 104-0031, Japan
| | - Takuro Iyo
- Department of Otorhinolaryngology Head and Neck Surgery, Wakayama Medical University, 811-1 Kimiidera, Wakayama-shi, Wakayama, 641-5810, Japan
| | - Masayoshi Hijiya
- Department of Otorhinolaryngology Head and Neck Surgery, Wakayama Medical University, 811-1 Kimiidera, Wakayama-shi, Wakayama, 641-5810, Japan
| | - Tatsuya Shiga
- Department of Otorhinolaryngology Head and Neck Surgery, Wakayama Medical University, 811-1 Kimiidera, Wakayama-shi, Wakayama, 641-5810, Japan
| | - Tetsuya Kinoshita
- Department of Otorhinolaryngology Head and Neck Surgery, Wakayama Medical University, 811-1 Kimiidera, Wakayama-shi, Wakayama, 641-5810, Japan
| | - Shunji Tamagawa
- Department of Otorhinolaryngology Head and Neck Surgery, Wakayama Medical University, 811-1 Kimiidera, Wakayama-shi, Wakayama, 641-5810, Japan
| | - Masanobu Hiraoka
- Department of Otorhinolaryngology Head and Neck Surgery, Wakayama Medical University, 811-1 Kimiidera, Wakayama-shi, Wakayama, 641-5810, Japan
| | - Makiko Ohtani
- Department of Otorhinolaryngology Head and Neck Surgery, Wakayama Medical University, 811-1 Kimiidera, Wakayama-shi, Wakayama, 641-5810, Japan
| | - Muneki Hotomi
- Department of Otorhinolaryngology Head and Neck Surgery, Wakayama Medical University, 811-1 Kimiidera, Wakayama-shi, Wakayama, 641-5810, Japan.
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Balázs VL, Horváth B, Kerekes E, Ács K, Kocsis B, Varga A, Böszörményi A, Nagy DU, Krisch J, Széchenyi A, Horváth G. Anti- Haemophilus Activity of Selected Essential Oils Detected by TLC-Direct Bioautography and Biofilm Inhibition. Molecules 2019; 24:molecules24183301. [PMID: 31514307 PMCID: PMC6767207 DOI: 10.3390/molecules24183301] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Revised: 09/05/2019] [Accepted: 09/10/2019] [Indexed: 01/31/2023] Open
Abstract
Essential oils (EOs) are becoming increasingly popular in medical applications because of their antimicrobial effect. Direct bioautography (DB) combined with thin layer chromatography (TLC) is a screening method for the detection of antimicrobial compounds in plant extracts, for example, in EOs. Due to their lipophilic character, the common microbiological assays (etc. disk diffusion) could not provide reliable results. The aim of this study was the evaluation of antibacterial and anti-biofilm properties of the EO of cinnamon bark, clove, peppermint, thyme, and their main components against Haemophilus influenzae and H. parainfluenzae. Oil in water (O/W) type Pickering nano-emulsions stabilized with silica nanoparticles from each oil were prepared to increase their water-solubility. Samples with Tween80 surfactant and absolute ethanol were also used. Results showed that H. influenzae was more sensitive to the EOs than H. parainfluenzae (except for cinnamon bark oil). In thin layer chromatography-direct bioautography (TLC-DB) the ethanolic solutions of thyme oil presented the best activity against H. influenzae, while cinnamon oil was the most active against H. parainfluenzae. Pickering nano-emulsion of cinnamon oil inhibited the biofilm formation of H. parainfluenzae (76.35%) more efficiently than samples with Tween80 surfactant or absolute ethanol. In conclusion, Pickering nano-emulsion of EOs could inhibit the biofilm production effectively.
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Affiliation(s)
- Viktória Lilla Balázs
- Department of Pharmacognosy, Faculty of Pharmacy, University of Pécs, H-7624 Pécs, Hungary; (V.L.B.)
| | - Barbara Horváth
- Institute of Pharmaceutical Technology and Biopharmacy, Faculty of Pharmacy, University of Pécs, H-7624 Pécs, Hungary; (B.H.); (A.S.)
| | - Erika Kerekes
- Department of Microbiology, Faculty of Science and Informatics, University of Szeged, H-6726 Szeged, Hungary;
| | - Kamilla Ács
- Department of Pharmacognosy, Faculty of Pharmacy, University of Pécs, H-7624 Pécs, Hungary; (V.L.B.)
| | - Béla Kocsis
- Department of Medical Microbiology and Immunology, Medical School, University of Pécs, H-7624 Pécs, Hungary; (B.K.); (A.V.)
| | - Adorján Varga
- Department of Medical Microbiology and Immunology, Medical School, University of Pécs, H-7624 Pécs, Hungary; (B.K.); (A.V.)
| | - Andrea Böszörményi
- Institute of Pharmacognosy, Faculty of Pharmacy, Semmelweis University, H-1085 Budapest, Hungary;
| | - Dávid U. Nagy
- Department of Genetics and Molecular Biology, Institute of Biology, Faculty of Sciences, University of Pécs, H-7624 Pécs, Hungary;
| | - Judit Krisch
- Department of Food Engineering, Faculty of Engineering, University of Szeged, H-6724 Szeged, Hungary;
| | - Aleksandar Széchenyi
- Institute of Pharmaceutical Technology and Biopharmacy, Faculty of Pharmacy, University of Pécs, H-7624 Pécs, Hungary; (B.H.); (A.S.)
| | - Györgyi Horváth
- Department of Pharmacognosy, Faculty of Pharmacy, University of Pécs, H-7624 Pécs, Hungary; (V.L.B.)
- Correspondence: ; Tel.: +36-72-503-625 (ext. 28823)
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