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Kennel C, Gould EA, Larson ED, Salcedo E, Vickery T, Restrepo D, Ramakrishnan VR. Differential Expression of Mucins in Murine Olfactory Versus Respiratory Epithelium. Chem Senses 2020; 44:511-521. [PMID: 31300812 DOI: 10.1093/chemse/bjz046] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [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: 12/29/2022] Open
Abstract
Mucins are a key component of the surface mucus overlying airway epithelium. Given the different functions of the olfactory and respiratory epithelia, we hypothesized that mucins would be differentially expressed between these 2 areas. Secondarily, we evaluated for potential changes in mucin expression with radiation exposure, given the clinical observations of nasal dryness, altered mucus rheology, and smell loss in radiated patients. Immunofluorescence staining was performed to evaluate expression of mucins 1, 2, 5AC, and 5B in nasal respiratory and olfactory epithelia of control mice and 1 week after exposure to 8 Gy of radiation. Mucins 1, 5AC, and 5B exhibited differential expression patterns between olfactory and respiratory epithelium (RE) while mucin 2 showed no difference. In the olfactory epithelium (OE), mucin 1 was located in a lattice-like pattern around gaps corresponding to dendritic knobs of olfactory sensory neurons, whereas in RE it was intermittently expressed by surface goblet cells. Mucin 5AC was expressed by subepithelial glands in both epithelial types but to a higher degree in the OE. Mucin 5B was expressed by submucosal glands in OE and by surface epithelial cells in RE. At 1-week after exposure to single-dose 8 Gy of radiation, no qualitative effects were seen on mucin expression. Our findings demonstrate that murine OE and RE express mucins differently, and characteristic patterns of mucins 1, 5AC, and 5B can be used to define the underlying epithelium. Radiation (8 Gy) does not appear to affect mucin expression at 1 week. LEVEL OF EVIDENCE N/A (Basic Science Research).IACUC-approved study [Protocol 200065].
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Affiliation(s)
- Christopher Kennel
- Department of Otolaryngology, University of Colorado School of Medicine, Aurora, CO, USA
| | - Elizabeth A Gould
- Department of Cell and Developmental Biology, University of Colorado School of Medicine, Aurora, CO, USA.,Rocky Mountain Taste and Smell Center, University of Colorado School of Medicine, Aurora, CO, USA.,Neuroscience Program, University of Colorado School of Medicine, Aurora, CO, USA
| | - Eric D Larson
- Department of Otolaryngology, University of Colorado School of Medicine, Aurora, CO, USA
| | - Ernesto Salcedo
- Department of Cell and Developmental Biology, University of Colorado School of Medicine, Aurora, CO, USA
| | - Thad Vickery
- Department of Otolaryngology, University of Colorado School of Medicine, Aurora, CO, USA
| | - Diego Restrepo
- Department of Cell and Developmental Biology, University of Colorado School of Medicine, Aurora, CO, USA.,Rocky Mountain Taste and Smell Center, University of Colorado School of Medicine, Aurora, CO, USA.,Neuroscience Program, University of Colorado School of Medicine, Aurora, CO, USA
| | - Vijay R Ramakrishnan
- Department of Otolaryngology, University of Colorado School of Medicine, Aurora, CO, USA.,Rocky Mountain Taste and Smell Center, University of Colorado School of Medicine, Aurora, CO, USA.,Department of Neurosurgery, University of Colorado School of Medicine, Aurora, CO, USA
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Kim SE, Park JH, Hong S, Koo JS, Jeong J, Jung WH. Primary Mucinous Cystadenocarcinoma of the Breast: Cytologic Finding and Expression of MUC5 Are Different from Mucinous Carcinoma. Korean J Pathol 2012; 46:611-6. [PMID: 23323116 PMCID: PMC3540343 DOI: 10.4132/koreanjpathol.2012.46.6.611] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/10/2012] [Revised: 07/02/2012] [Accepted: 07/17/2012] [Indexed: 11/17/2022]
Abstract
Mucinous cystadenocarcinoma (MCA) in the breast is a rare neoplasm. There have been 13 cases of primary breast MCA reported. The MCA presents as a large, partially cystic mass in postmenopausal woman with a good prognosis. The microscopic findings resemble those of ovarian, pancreatic, or appendiceal MCA. The aspiration findings showed mucin-containing cell clusters in the background of mucin and necrotic material. The cell clusters had intracytoplasmic mucin displacing atypical nuclei to the periphery. Histologically, the tumor revealed an abundant mucin pool with small floating clusters of mucin-containing tumor cells. There were also small cysts lined by a single layer of tall columnar mucinous cells, resembling those of the uterine endocervix. The cancer cells were positive for mucin (MUC) 5 and negative for MUC2 and MUC6. This mucin profile is different from ordinary mucinous carcinoma and may be a unique characteristic of breast MCA.
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Affiliation(s)
- Sung Eun Kim
- Department of Pathology, Gangnam Sevrance Hsopital, Yonsei University College of Medicine, Seoul, Korea
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