Metaplasia
Metaplasia - Related Videos
03:21
Acinar-to-Ductal Metaplasia Induction: A Method to Study Acinar Cell to Ductal Cell Differentiation in 3D Ex Vivo Culture
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2023
This video describes the technique of differentiating pancreatic acinar cells to ductal cells in ex vivo 3D culture. This helps to understand the mechanisms regulating the acinar-to-ductal metaplasia (ADM), a key process in the early development of pancreatic cancer.
01:24
Cellular Adaptation IV: Dysplasia and Metaplasia
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2026
DysplasiaDysplasia refers to abnormal changes in the size, shape, and organization of mature cells, characterized by pleomorphism, nuclear abnormalities, and increased mitotic activity. It commonly affects epithelial tissues, including the cervix, gastrointestinal tract, respiratory mucosa, and endometrium. Although it may occur alongside hyperplasia, dysplasia is not a true adaptive response but a preneoplastic change with potential to progress to cancer.When confined above the basement...
08:16
Mimicking and Manipulating Pancreatic Acinar-to-Ductal Metaplasia in 3-dimensional Cell Culture
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Cited by 20 •
2019
Primary acinar cell isolation, protein expression or activity modulation, culture, and down-stream applications are abundantly useful in the ex vivo study of acinar-to-ductal metaplasia (ADM), an early event in the development of pancreatic cancer.
06:55
Diagnosis of Neoplasia in Barrett’s Esophagus using Vital-dye Enhanced Fluorescence Imaging
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Cited by 1 •
2014
Vital-dye enhanced fluorescence imaging (VFI) is a novel in vivo technique that combines high-resolution epithelial imaging with exogenous topical fluorescent contrast to highlight glandular morphology and delineate neoplasia (high grade dysplasia and cancer) in the distal esophagus.
12:16
Production, Characterization and Potential Uses of a 3D Tissue-engineered Human Esophageal Mucosal Model
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Cited by 3 •
2015
This manuscript describes the production, characterization and potential uses of a tissue engineered 3D esophageal construct prepared from normal primary human esophageal fibroblast and squamous epithelial cells seeded within a de-cellularized porcine scaffold. The results demonstrate the formation of a mature stratified epithelium similar to the normal human esophagus.
FAQs
Chronic irritation changes local signaling within the affected tissue, influencing stem or progenitor cells as they generate new cells. The resulting population adopts a different epithelial phenotype rather than arising through direct conversion of already mature cells. This mechanism explains how persistent environmental stress can reshape tissue composition while preserving an adaptive relationship to the local conditions.
The progenitor-cell mechanism shows that metaplasia reflects altered tissue renewal, not a simple transformation of one mature cell into another. Local signals redirect the type of epithelium produced during regeneration. Clinically, this helps explain why the change may be reversible and why continued irritation remains relevant to later tissue abnormalities.
Metaplasia represents an adaptive epithelial response to persistent stress, whereas dysplasia is presented as a possible subsequent change when that stress continues. Finding metaplasia therefore does not by itself indicate malignancy, but it can identify tissue exposed to conditions associated with later progression. This distinction supports careful assessment rather than treating both findings as equivalent.
Clinically relevant patterns include intestinal metaplasia in the stomach or esophagus and squamous metaplasia in the respiratory tract. These examples show that the replacement phenotype varies with the tissue and its environmental challenge. Recognizing the expected pattern in each site helps clinicians interpret biopsy findings in relation to the location and type of persistent irritation.
Biopsy specimens allow clinicians to identify the altered epithelial phenotype directly in tissue. That finding helps them evaluate underlying injury and determine whether the specimen shows a metaplastic response in a clinically relevant site. Biopsy assessment also provides a basis for monitoring progression and managing risk when persistent stress may continue to affect the tissue.
Identifying metaplasia alerts clinicians to an adaptive tissue response associated with ongoing environmental stress. The finding can guide evaluation of the underlying injury, support monitoring for progression, and inform risk management. Continued stress is important because the tissue may later develop dysplasia and, in some locations, changes associated with malignancy.