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Kong Q, Yang R, Wang Z, Zhou W, Du X, Huang S, Jiang Y, Liu W, Sang H. Transcriptomic and virulence factors analyses of Cryptococcus neoformans hypoxia response. APMIS 2017; 125:236-248. [PMID: 28233445 DOI: 10.1111/apm.12647] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2016] [Accepted: 12/23/2016] [Indexed: 11/30/2022]
Abstract
Cryptococcus neoformans is an environmental pathogen requiring atmospheric levels of oxygen for optimal growth. Upon inhalation, C. neoformans disseminates to the brain and causes meningoencephalitis. However, the mechanisms by which the pathogen adapts to the low-oxygen environment in the brain have not been investigated. We isolated a C. neoformans strain with a small capsule from a host tissue, although this strain produces large capsules in normoxic conditions. We hypothesize that this difference in capsule size is attributed to hypoxia caused by chronic inflammatory response. This study investigated the effect of hypoxia on virulence factors (including capsule, melanin, urease, and phospholipase) of C. neoformans and conducted transcriptomic analyses of the virulence-associated genes. We found that C. neoformans grew under hypoxic condition, albeit slowly, and that hypoxia may have inhibited the capsule size, melanin production, and phospholipase and urease activities in C. neoformans.
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Affiliation(s)
- Qingtao Kong
- Department of Dermatology, Jinling Hospital, Nanjing University, School of Medicine, Nanjing, China
| | - Rui Yang
- Department of Dermatology, Jinling Hospital, Nanjing University, School of Medicine, Nanjing, China
| | - Zhen Wang
- Department of Radiation Oncology, Jinling Hospital, Nanjing University, School of Medicine, Nanjing, China
| | - Wenquan Zhou
- Department of Urinary Surgery, Jinling Hospital, Nanjing University, School of Medicine, Nanjing, China
| | - Xue Du
- Department of Dermatology, Jinling Hospital, Nanjing University, School of Medicine, Nanjing, China
| | - Suyang Huang
- Department of Dermatology, Jinling Hospital, Nanjing University, School of Medicine, Nanjing, China
| | - Yuan Jiang
- Department of Dermatology, Jinling Hospital, Nanjing University, School of Medicine, Nanjing, China
| | - Weida Liu
- Institute of Dermatology, Chinese Academy of Medical Sciences, Peking Union Medical College, Nanjing, China
| | - Hong Sang
- Department of Dermatology, Jinling Hospital, Nanjing University, School of Medicine, Nanjing, China
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Current awareness on yeast. Yeast 2010. [DOI: 10.1002/yea.1715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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Growth strategy of the pathogenic yeast Cryptococcus neoformans submerged culture under different cultivation formats. Folia Microbiol (Praha) 2009; 54:349-52. [DOI: 10.1007/s12223-009-0044-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2008] [Revised: 05/20/2009] [Indexed: 10/20/2022]
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Moranova Z, Kawamoto S, Raclavsky V. HYPOXIA SENSING IN CRYPTOCOCCUS NEOFORMANS: BIOFILM-LIKE ADAPTATION FOR DORMANCY? Biomed Pap Med Fac Univ Palacky Olomouc Czech Repub 2009; 153:189-93. [DOI: 10.5507/bp.2009.031] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
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