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Oki H, Niwa R, Pranee S, Motooka D, Onda Y, Nakata J, Nakajima H, Oka Y, Sugiyama H, Yoshii Y, Anzai N, Nakamura S, Iida T. Identification of causative fungus from sterile abscess using metagenomics followed by in situ hybridization. Access Microbiol 2024; 6:000779.v3. [PMID: 39148686 PMCID: PMC11325578 DOI: 10.1099/acmi.0.000779.v3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Accepted: 07/24/2024] [Indexed: 08/17/2024] Open
Abstract
Introduction. Invasive fungal infections require early diagnosis for treatment. Microscopic observation of biopsy and blood culture is the gold standard for the identification of the causative fungus, but it is difficult to identify the causative pathogen by a sterile abscess biopsy. Case Presentation. We present a case report of breakthrough invasive trichosporonosis in a 65-year-old Japanese male with acute myeloid leukaemia receiving antifungal prophylaxis. Blood cultures showed no fungal growth, and a liver biopsy and a removed spleen with abscess showed fragmented fungi, but no fungal identification was possible. This report demonstrates that retrospective analyses were able to identify the causative fungus. Conclusion. We narrowed down the candidate fungi by deep sequencing of the ITS1 region of fungal genome and confirmed that the fungus observed in the specimen was Trichosporon asahii by in situ hybridization using a DNA probe targeting 26S rRNA.
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Affiliation(s)
- Hiroya Oki
- Department of Infection Metagenomics, Research Institute for Microbial Diseases (RIMD), Osaka University, Osaka, Japan
- NGS Core Facility, Research Institute for Microbial Diseases (RIMD), Osaka University, Osaka, Japan
| | - Ryotaro Niwa
- Department of Hematology and Oncology, Takatsuki Red Cross Hospital, Osaka, Japan
- Department of Hematology, Yodogawa Christian Hospital, Osaka, Japan
| | - Somboonthum Pranee
- Department of Bacterial Infections, Research Institute for Microbial Diseases (RIMD), Osaka University, Osaka, Japan
| | - Daisuke Motooka
- Department of Infection Metagenomics, Research Institute for Microbial Diseases (RIMD), Osaka University, Osaka, Japan
- NGS Core Facility, Research Institute for Microbial Diseases (RIMD), Osaka University, Osaka, Japan
- Institute for Open and Transdisciplinary Research Initiatives (OTRI), Integrated Frontier Research for Medical Science Division (iFremed), Osaka University, Osaka, Japan
| | - Yoshiyuki Onda
- Department of Hematology and Oncology, Takatsuki Red Cross Hospital, Osaka, Japan
- Department of Hematology and Oncology, Osaka Red Cross Hospital, Osaka, Japan
| | - Jun Nakata
- Department of Clinical Laboratory and Biomedical Sciences, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Hiroko Nakajima
- Department of Cancer Immunology, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Yoshihiro Oka
- Department of Cancer Stem Cell Biology, Graduate School of Medicine, Osaka University, Osaka, Japan
- Department of Immunopathology, Immunology Frontier Research Center (World Premier International Research Center), Osaka University, Osaka, Japan
| | - Haruo Sugiyama
- Department of Cancer Immunology, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Yuka Yoshii
- NGS Core Facility, Research Institute for Microbial Diseases (RIMD), Osaka University, Osaka, Japan
| | - Naoyuki Anzai
- Department of Hematology and Oncology, Takatsuki Red Cross Hospital, Osaka, Japan
| | - Shota Nakamura
- Department of Infection Metagenomics, Research Institute for Microbial Diseases (RIMD), Osaka University, Osaka, Japan
- NGS Core Facility, Research Institute for Microbial Diseases (RIMD), Osaka University, Osaka, Japan
- Institute for Open and Transdisciplinary Research Initiatives (OTRI), Integrated Frontier Research for Medical Science Division (iFremed), Osaka University, Osaka, Japan
| | - Tetsuya Iida
- Department of Infection Metagenomics, Research Institute for Microbial Diseases (RIMD), Osaka University, Osaka, Japan
- Department of Bacterial Infections, Research Institute for Microbial Diseases (RIMD), Osaka University, Osaka, Japan
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Shigeto H, Miyata H, Ashizawa T, Iizuka A, Kikuchi Y, Hozumi C, Maeda C, Yamaguchi K, Yamamura S, Akiyama Y. Localization of EGFR Mutations in Non-small-cell Lung Cancer Tissues Using Mutation-specific PNA-DNA Probes. Cancer Genomics Proteomics 2023; 20:375-382. [PMID: 37400147 PMCID: PMC10320556 DOI: 10.21873/cgp.20389] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 06/09/2023] [Accepted: 06/19/2023] [Indexed: 07/05/2023] Open
Abstract
BACKGROUND/AIM Epidermal growth factor receptor (EGFR) signaling inhibitors are potent therapeutic agents for EGFR-mutant non-small-cell lung cancer, but the effects of such inhibitors on the localization of EGFR mutations in tumor tissues remain to be elucidated. Thus, a simple and efficient technology for the detection of mutations in tumor tissue specimens needs to be developed. MATERIALS AND METHODS Using an EGFR mutation-specific peptide nucleic acid (PNA)-DNA probe, the EGFR mutation-positive part of whole NSCLC tissues was visualized by immunofluorescence. Formalin-fixed paraffin-embedded sections obtained from A549, NCI-H1975, HCC827 and PC-9 tumors transplanted into nude mice were subjected to staining using PNA-DNA probes specific for the mRNA sequences producing the L858R, del E746-A750 and T790M mutations. RESULTS The probes for the L858R mutation showed intense positive staining in H1975 cells, and the probe for the del E746-A750 mutation exhibited positive staining specifically in HCC827 and PC-9 tumors. On the other hand, A549 tumors without EGFR mutation did not show any significant staining for any PNA-DNA probe. In combination staining, the addition of cytokeratin stain increased the positive staining rate of each PNA-DNA probe. In addition, the positive staining rate of the probes for the L858R mutation was comparable to that of the antibody to EGFR L858R mutated protein. CONCLUSION PNA-DNA probes specific for EGFR mutations might be useful tools to detect heterogeneous mutant EGFR expression in cancer tissues and efficiently evaluate the effect of EGFR signaling inhibitors on tissues of EGFR-mutant cancer.
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Affiliation(s)
- Hajime Shigeto
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Kagawa, Japan
| | - Haruo Miyata
- Immunotherapy Division, Shizuoka Cancer Center Research Institute, Shizuoka, Japan
| | - Tadashi Ashizawa
- Immunotherapy Division, Shizuoka Cancer Center Research Institute, Shizuoka, Japan
| | - Akira Iizuka
- Immunotherapy Division, Shizuoka Cancer Center Research Institute, Shizuoka, Japan
| | - Yasufumi Kikuchi
- Immunotherapy Division, Shizuoka Cancer Center Research Institute, Shizuoka, Japan
| | - Chikako Hozumi
- Immunotherapy Division, Shizuoka Cancer Center Research Institute, Shizuoka, Japan
| | - Chie Maeda
- Immunotherapy Division, Shizuoka Cancer Center Research Institute, Shizuoka, Japan
| | | | - Shohei Yamamura
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Kagawa, Japan
| | - Yasuto Akiyama
- Immunotherapy Division, Shizuoka Cancer Center Research Institute, Shizuoka, Japan;
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Kurakado S, Matsumoto Y, Yamada T, Shimizu K, Wakasa S, Sugita T. Tacrolimus inhibits stress responses and hyphal formation via the calcineurin signaling pathway in Trichosporon asahii. Microbiol Immunol 2023; 67:49-57. [PMID: 36398783 DOI: 10.1111/1348-0421.13039] [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: 08/05/2022] [Revised: 10/09/2022] [Accepted: 11/07/2022] [Indexed: 11/19/2022]
Abstract
The pathogenic fungus Trichosporon asahii causes fatal deep-seated mycosis in immunocompromised patients. Calcineurin, which is widely conserved in eukaryotes, regulates cell growth and various stress responses in fungi. Tacrolimus (FK506), a calcineurin inhibitor, induces sensitivity to compounds that cause stress on the cell membrane and cell wall integrity. In this study, we demonstrated that FK506 affects stress responses and hyphal formation in T. asahii. In silico structural analysis revealed that amino acid residues in the binding site of the calcineurin-FKBP12 complex that interact with FK506 are conserved in T. asahii. The growth of T. asahii was delayed by FK506 in the presence of SDS or Congo red but not in the presence of calcium chloride. FK506 also inhibited hyphal formation in T. asahii. A mutant deficient of the cnb gene, which encodes the regulatory subunit B of calcineurin, exhibited stress sensitivities on exposure to SDS and Congo red and reduced the hyphal forming ability of T. asahii. In the cnb-deficient mutant, FK506 did not increase the stress sensitivity or reduce hyphal forming ability. These results suggest that FK506 affects stress responses and hyphal formation in T. asahii via the calcineurin signaling pathway.
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Affiliation(s)
- Sanae Kurakado
- Department of Microbiology, Meiji Pharmaceutical University, Tokyo, Japan
| | - Yasuhiko Matsumoto
- Department of Microbiology, Meiji Pharmaceutical University, Tokyo, Japan
| | - Tsuyoshi Yamada
- Teikyo University Institute of Medical Mycology, Tokyo, Japan.,Asia International Institute of Infectious Disease Control, Teikyo University, Tokyo, Japan
| | - Kiminori Shimizu
- Department of Biological Science and Technology, Tokyo University of Science, Tokyo, Japan.,Medical Mycology Research Center, Chiba University, Chiba, Japan
| | - Shogo Wakasa
- Department of Microbiology, Meiji Pharmaceutical University, Tokyo, Japan
| | - Takashi Sugita
- Department of Microbiology, Meiji Pharmaceutical University, Tokyo, Japan
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Ashraf MJ, Shamsizadeh F, Morovati H, Hejazinia S, Kord M, Ansari S, Pakshir K, Shekarkhar G, Zomorodian K. Accompanying a semi‐nested
PCR
assay to support histopathology findings of fungal keratitis in formalin‐fixed paraffin‐embedded corneal samples. J Clin Lab Anal 2022; 36:e24764. [DOI: 10.1002/jcla.24764] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 09/28/2022] [Accepted: 10/31/2022] [Indexed: 11/14/2022] Open
Affiliation(s)
| | - Foroogh Shamsizadeh
- Department of Parasitology and Mycology, School of Medicine Shiraz University of Medical Sciences Shiraz Iran
| | - Hamid Morovati
- Department of Parasitology and Mycology, School of Medicine Shiraz University of Medical Sciences Shiraz Iran
| | - Safoora Hejazinia
- Department of Pathology Shiraz University of Medical Sciences Shiraz Iran
| | - Mohammad Kord
- Department of Parasitology and Mycology, School of Medicine Shiraz University of Medical Sciences Shiraz Iran
| | - Saham Ansari
- Department of Medical Parasitology and Mycology, School of Medicine Shahid Beheshti University of Medical Sciences Tehran Iran
| | - Keyvan Pakshir
- Department of Parasitology and Mycology, School of Medicine Shiraz University of Medical Sciences Shiraz Iran
- Basic Sciences in Infectious Diseases Research Center Shiraz University of Medical Sciences Shiraz Iran
| | - Golsa Shekarkhar
- Department of Pathology Shiraz University of Medical Sciences Shiraz Iran
| | - Kamiar Zomorodian
- Department of Parasitology and Mycology, School of Medicine Shiraz University of Medical Sciences Shiraz Iran
- Basic Sciences in Infectious Diseases Research Center Shiraz University of Medical Sciences Shiraz Iran
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Tochigi N, Sadamoto S, Oura S, Kurose Y, Miyazaki Y, Shibuya K. Artificial Intelligence in the Diagnosis of Invasive Mold Infection: Development of an Automated Histologic Identification System to Distinguish Between <i>Aspergillus</i> and Mucorales. Med Mycol J 2022; 63:91-97. [DOI: 10.3314/mmj.22-00013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
Affiliation(s)
- Naobumi Tochigi
- Department of Surgical Pathology, Faculty of Medicine, Toho University
| | - Sota Sadamoto
- Department of Surgical Pathology, Faculty of Medicine, Toho University
| | - Shinji Oura
- Department of Surgical Pathology, Faculty of Medicine, Toho University
| | - Yasuko Kurose
- Department of Surgical Pathology, Faculty of Medicine, Toho University
| | - Yoshitsugu Miyazaki
- Department of Chemotherapy and Mycoses, National Institute of Infectious Diseases
| | - Kazutoshi Shibuya
- Department of Surgical Pathology, Faculty of Medicine, Toho University
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6
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Sadamoto S, Mitsui Y, Nihonyanagi Y, Amemiya K, Shinozaki M, Murayama SY, Abe M, Umeyama T, Tochigi N, Miyazaki Y, Shibuya K. Comparison Approach for Identifying Missed Invasive Fungal Infections in Formalin-Fixed, Paraffin-Embedded Autopsy Specimens. J Fungi (Basel) 2022; 8:jof8040337. [PMID: 35448568 PMCID: PMC9030445 DOI: 10.3390/jof8040337] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Revised: 03/19/2022] [Accepted: 03/23/2022] [Indexed: 02/05/2023] Open
Abstract
Invasive fungal infection (IFI) has a high mortality rate in patients who undergo hematopoietic stem cell transplantation, and it is often confirmed by postmortem dissection. When IFI is initially confirmed after an autopsy, the tissue culture and frozen section are challenging to secure, and in many cases, formalin-fixed, paraffin-embedded (FFPE) samples represent the only modality for identifying fungi. Histopathological diagnosis is a useful method in combination with molecular biological methods that can achieve more precise identification with reproducibility. Meanwhile, polymerase chain reaction (PCR) using fungal-specific primers helps identify fungi from FFPE tissues. Autopsy FFPE specimens have a disadvantage regarding the quality of DNA extracted compared with that of specimens obtained via biopsy or surgery. In the case of mucormycosis diagnosed postmortem histologically, we examined currently available molecular biological methods such as PCR, immunohistochemistry (IHC), and in situ hybridization (ISH) to identify fungi. It is reasonable that PCR with some modification is valuable for identifying fungi in autopsy FFPE specimens. However, PCR does not always correctly identify fungi in autopsy FFPE tissues, and other approaches such as ISH or IHC are worth considering for clarifying the broad classification (such as the genus- or species-level classification).
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Affiliation(s)
- Sota Sadamoto
- Department of Surgical Pathology, Toho University School of Medicine, Tokyo 143-8541, Japan; (S.S.); (Y.N.); (K.A.); (M.S.); (K.S.)
- Department of Fungal Infection, National Institute of infectious Diseases, Tokyo 162-8640, Japan; (S.Y.M.); (M.A.); (T.U.); (Y.M.)
| | - Yurika Mitsui
- Department of Hematology and Oncology, Toho University School of Medicine, Tokyo 143-8541, Japan;
| | - Yasuhiro Nihonyanagi
- Department of Surgical Pathology, Toho University School of Medicine, Tokyo 143-8541, Japan; (S.S.); (Y.N.); (K.A.); (M.S.); (K.S.)
| | - Kazuki Amemiya
- Department of Surgical Pathology, Toho University School of Medicine, Tokyo 143-8541, Japan; (S.S.); (Y.N.); (K.A.); (M.S.); (K.S.)
| | - Minoru Shinozaki
- Department of Surgical Pathology, Toho University School of Medicine, Tokyo 143-8541, Japan; (S.S.); (Y.N.); (K.A.); (M.S.); (K.S.)
| | - Somay Yamagata Murayama
- Department of Fungal Infection, National Institute of infectious Diseases, Tokyo 162-8640, Japan; (S.Y.M.); (M.A.); (T.U.); (Y.M.)
| | - Masahiro Abe
- Department of Fungal Infection, National Institute of infectious Diseases, Tokyo 162-8640, Japan; (S.Y.M.); (M.A.); (T.U.); (Y.M.)
| | - Takashi Umeyama
- Department of Fungal Infection, National Institute of infectious Diseases, Tokyo 162-8640, Japan; (S.Y.M.); (M.A.); (T.U.); (Y.M.)
| | - Naobumi Tochigi
- Department of Surgical Pathology, Toho University School of Medicine, Tokyo 143-8541, Japan; (S.S.); (Y.N.); (K.A.); (M.S.); (K.S.)
- Correspondence:
| | - Yoshitsugu Miyazaki
- Department of Fungal Infection, National Institute of infectious Diseases, Tokyo 162-8640, Japan; (S.Y.M.); (M.A.); (T.U.); (Y.M.)
| | - Kazutoshi Shibuya
- Department of Surgical Pathology, Toho University School of Medicine, Tokyo 143-8541, Japan; (S.S.); (Y.N.); (K.A.); (M.S.); (K.S.)
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Ashraf MJ, Kord M, Morovati H, Ansari S, Shekarkhar G, Badali H, Pakshir K, Shamsizadeh F, Khademi B, Shishegar M, Ahmadikia K, Zomorodian K. Evaluating a semi-nested PCR to support histopathology reports of fungal rhinosinusitis in formalin-fixed paraffin-embedded tissue samples. J Clin Lab Anal 2022; 36:e24209. [PMID: 34997792 PMCID: PMC8841172 DOI: 10.1002/jcla.24209] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Revised: 11/17/2021] [Accepted: 12/17/2021] [Indexed: 11/06/2022] Open
Abstract
BACKGROUND Fungal rhinosinusitis (FRS) encompasses a various spectrum of diseases. Histopathology is the "reference method" for diagnosing FRS, but it cannot determine the genus and species. Moreover, in more than 50% of the histopathologically proven cases, the culture elicited no reliable results. This study was an attempt to evaluate the diagnostic efficiency of semi-nested polymerase chain reaction (PCR) from formalin-fixed paraffin-embedded (FFPE) functional endoscopic sinus surgery (FESS) in FRS patients. METHODS One hundred ten specimens were subjected to DNA extraction and histopathology examination. The amplification of the β-globin gene by conventional PCR was used to confirm the quality of extracted DNA. The semi-nested PCR was performed using ITS1, ITS2, and ITS4 primers during two steps. Sequencing the internal transcribed spacer region (ITS1-5.8S-ITS2) to identify causative agents was performed on PCR products. RESULTS Sixty-four out of 110 samples were positive by histopathology evidence, of which 56 samples (87.5%) were positive by PCR. Out of 46 negative samples by histopathological methods, five samples (10.9%) yielded positive results by PCR. Sensitivity, specificity, positive predictive value, and negative predictive value of the semi-nested PCR method were reported 87.5%, 89.2%, 92.7%, and 85.2%, respectively. The kappa factor between PCR and histopathological methods was 0.76, indicating substantial agreements between these two tests. CONCLUSION Due to the acceptable sensitivity and specificity of the present method, it might be used to diagnose fungal sinusitis infections along with microscopic techniques. This method is recommended to confirm the diagnose of suspected fungal sinusitis with negative histopathology results.
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Affiliation(s)
- Mohammad Javad Ashraf
- Department of Pathology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Mohammad Kord
- Department of Parasitology and Mycology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Hamid Morovati
- Department of Parasitology and Mycology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Saham Ansari
- Department of Medical Parasitology and Mycology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Golsa Shekarkhar
- Department of Pathology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Hamid Badali
- Fungus Testing Laboratory, Department of Pathology and Laboratory Medicine, University of Texas Health Science Center at San Antonio, San Antonio, Texas, USA.,Invasive Fungi Research Center, Communicable Diseases Institute, Mazandaran University of Medical Sciences, Sari, Iran
| | - Kayvan Pakshir
- Department of Parasitology and Mycology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran.,Basic Sciences in Infectious Diseases Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Forough Shamsizadeh
- Department of Parasitology and Mycology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Bijan Khademi
- Research Center of Otolaryngology Head and Neck Surgery, Shiraz University of Medical Sciences, Shiraz, Iran.,Department of Otolaryngology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Mahmood Shishegar
- Research Center of Otolaryngology Head and Neck Surgery, Shiraz University of Medical Sciences, Shiraz, Iran.,Department of Otolaryngology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Kazem Ahmadikia
- Department of Medical Parasitology and Mycology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Kamiar Zomorodian
- Department of Parasitology and Mycology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran.,Basic Sciences in Infectious Diseases Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
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8
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Liu X, Song Y, Li R. The use of combined PCR, fluorescence in situ hybridisation and immunohistochemical staining to diagnose mucormycosis from formalin-fixed paraffin-embedded tissues. Mycoses 2021; 64:1460-1470. [PMID: 34674327 DOI: 10.1111/myc.13382] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2021] [Revised: 10/12/2021] [Accepted: 10/15/2021] [Indexed: 12/13/2022]
Abstract
OBJECTIVE To develop a comprehensive diagnostic system for mucormycosis from formalin-fixed paraffin-embedded tissues, consisting of own-designed real-time polymerase chain reaction (PCR) assays, fluorescence in situ hybridisation, and immunohistochemical staining. METHODS We designed 11 primers and probes for specific real-time PCR assays based on genome sequences, and validated the specificity by Aspergillus, Fusarium, Scedosporium, Lomentospora, Cryptococcus and Candida species. Formalin-fixed paraffin-embedded (FFPE) tissues from forty-four mouse model infected by above fungi were collected and extracted DNA by laser capture microdissection (LCM) and direct extraction methods for real-time PCR assays. In addition, seventeen clinical specimens histopathologically proven for mucormycosis were included for specific detection with the new diagnostic system. RESULTS The real-time PCR assays allowed detection of a minimum of 10 CFU/ml equivalent gDNA of each species. No cross-reaction with gDNA among species was noted. From mouse model specimens, the sensitivity of real-time PCR in samples extracted with LCM versus direct extraction method was 100% versus 91.43% at Mucorales level and 80% versus 45.71% at species level, respectively. The specificity was 100%. From clinical samples, LCM combined with real-time PCR can test 88.24% (15/17) of Mucorales. Sensitivities of fluorescence in situ hybridisation (FISH) and immunohistochemical staining (IHC) were 70.59% and 41.18%, respectively. Combined LCM-RT-PCR, FISH and IHC yielded positive results in all samples. CONCLUSIONS The combination diagnostic system we developed is a culture-independent and robust method which enables rapid species identification from FFPE tissues for timely diagnosis of mucormycosis.
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Affiliation(s)
- Xiao Liu
- Department of Dermatology and Venerology, Peking University First Hospital, Beijing, China.,Research Center for Medical Mycology, Peking University, Beijing, China.,National Clinical Research Center for Skin and Immune Diseases, Beijing, China.,Beijing Key Laboratory of Molecular Diagnosis of Dermatoses, Peking University First Hospital, Beijing, China
| | - Yinggai Song
- Department of Dermatology and Venerology, Peking University First Hospital, Beijing, China.,Research Center for Medical Mycology, Peking University, Beijing, China.,National Clinical Research Center for Skin and Immune Diseases, Beijing, China.,Beijing Key Laboratory of Molecular Diagnosis of Dermatoses, Peking University First Hospital, Beijing, China
| | - Ruoyu Li
- Department of Dermatology and Venerology, Peking University First Hospital, Beijing, China.,Research Center for Medical Mycology, Peking University, Beijing, China.,National Clinical Research Center for Skin and Immune Diseases, Beijing, China.,Beijing Key Laboratory of Molecular Diagnosis of Dermatoses, Peking University First Hospital, Beijing, China
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