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Tsuchida S, Yamashita K, Murata S, Miyabe A, Satoh M, Matsushita K, Nakayama T, Nomura F, Umemura H. Evaluation of a novel sample preparation method for identifying Aspergillus fumigatus using matrix-assisted laser desorption/ionization time-of-flight mass spectrometry: Combining Yatalase and silica beads treatment. J Microbiol Methods 2023; 207:106706. [PMID: 36925050 DOI: 10.1016/j.mimet.2023.106706] [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: 08/07/2022] [Revised: 03/12/2023] [Accepted: 03/13/2023] [Indexed: 03/15/2023]
Abstract
Aspergillus spp. belong to filamentous fungi and sometimes cause invasive aspergillosis which has high mortality. Filamentous fungi are generally identified morphologically. However, morphologic identification is time consuming and requires advanced skills. It is difficult to train technicians and ensure a high level of quality. Therefore, an identification technique that is both accurate and relatively easy to learn is needed. In the present study, we focused on the effects of Yatalase and silica beads, which enable the efficient extraction of proteins via cell wall disruption of Aspergillus spp., and aimed to establish a novel sample preparation method using Yatalase and silica beads to enhance the efficiency of Aspergillus spp. identification with matrix-assisted laser desorption/ionization time-of-flight mass spectrometry. The sample preparation method using the combination of Yatalase and silica beads showed higher accuracy for the identification of Aspergillus spp. compared with Yatalase or silica beads alone. The Yatalase/silica beads method also resulted in significantly higher identification scores compared with the conventional method for the identification of Aspergillus fumigatus (n = 33). These findings indicate that our novel Yatalase/silica beads method provides more reliable identification of A. fumigatus than does the conventional method.
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Affiliation(s)
- Sachio Tsuchida
- Division of Laboratory Medicine, Department of Pathology and Microbiology, Nihon University School of Medicine, 30-1 Oyaguchikamicho, Itabashi-ku, Tokyo 173-8610, Japan; Division of Clinical Mass Spectrometry, Chiba University Hospital, 1-8-1 Inohana, Chuo-ku, Chiba 260-8670, Japan
| | - Koji Yamashita
- Department of Clinical Laboratory, Chiba University Hospital, 1-8-1 Inohana, Chuo-ku, Chiba 260-8670, Japan; Division of Clinical Research, Medical Mycology Research Center, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8670, Japan
| | - Syota Murata
- Department of Clinical Laboratory, Chiba University Hospital, 1-8-1 Inohana, Chuo-ku, Chiba 260-8670, Japan
| | - Akiko Miyabe
- Department of Clinical Laboratory, Chiba University Hospital, 1-8-1 Inohana, Chuo-ku, Chiba 260-8670, Japan
| | - Mamoru Satoh
- Division of Clinical Mass Spectrometry, Chiba University Hospital, 1-8-1 Inohana, Chuo-ku, Chiba 260-8670, Japan
| | - Kazuyuki Matsushita
- Department of Clinical Laboratory, Chiba University Hospital, 1-8-1 Inohana, Chuo-ku, Chiba 260-8670, Japan
| | - Tomohiro Nakayama
- Division of Laboratory Medicine, Department of Pathology and Microbiology, Nihon University School of Medicine, 30-1 Oyaguchikamicho, Itabashi-ku, Tokyo 173-8610, Japan
| | - Fumio Nomura
- Division of Clinical Mass Spectrometry, Chiba University Hospital, 1-8-1 Inohana, Chuo-ku, Chiba 260-8670, Japan
| | - Hiroshi Umemura
- Division of Laboratory Medicine, Department of Pathology and Microbiology, Nihon University School of Medicine, 30-1 Oyaguchikamicho, Itabashi-ku, Tokyo 173-8610, Japan; Division of Clinical Mass Spectrometry, Chiba University Hospital, 1-8-1 Inohana, Chuo-ku, Chiba 260-8670, Japan.
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Ogawa S, Ito M, Ohki H, Kimura T, Shimizu T, Matsuda M, Miyairi K. Glycosylation Status and Conformational Stability of Recombinant Stereum purpureum Endopolygalacturonase IVs Produced in an Aspergillus oryzae Expression System. J Appl Glycosci (1999) 2012. [DOI: 10.5458/jag.jag.jag-2011_017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022] Open
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