Open AccessAssessment of cell proliferation and muscular structure following surgical tongue volume reduction in pigs
Author(s) -
Ye W.,
Abu A. F.,
Liu Z. J.
Publication year - 2010
Publication title -
cell proliferation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.647
H-Index - 74
eISSN - 1365-2184
pISSN - 0960-7722
DOI - 10.1111/j.1365-2184.2010.00705.x
Subject(s) - endomysium , masson's trichrome stain , tongue , connective tissue , anatomy , regeneration (biology) , pathology , medicine , trichrome , reduction (mathematics) , glossectomy , fibrosis , atrophy , myocyte , h&e stain , staining , biology , microbiology and biotechnology , coeliac disease , geometry , mathematics , disease
Objectives: Tongue volume reduction is an adjunct treatment in several orofacial orthopaedic procedures for various craniofacial deformities; it may affect structural reconstitution and functional recovery as a result of the repair process. The aim of this study was to investigate myogenic regeneration and structural alteration of the tongue following surgical tongue volume reduction. Materials and methods: Five 12‐week‐old sibling pairs of Yucatan minipigs (three males and two females) were used. Midline uniform glossectomy was performed on one of each pair (reduction); siblings had identical incisions without tissue removal (sham). All pigs were raised for a further 4 weeks and received 5‐bromo‐2‐deoxyuridine (BrdU) injection intravenously 1 day before killing. Tissue sections of tongues were stained with anti‐BrdU antibody to evaluate numbers of replicating cells. Haematoxylin and eosin plus trichrome staining were performed to assess muscular structure. Results: Reduction tongues contained significantly more BrdU+ cells compared to sham tongues ( P < 0.01). However, these BrdU+ cells were mostly identified in reparative connective tissues (fibroblasts) rather than in regenerating muscle tissue (myoblasts). Trichrome‐stained sections showed disorganized collagen fibres linked to few intermittent muscle fibres in the reduction tongues. These myofibres presented signs of atrophy with reduced perimysium and endomysium. Matrix between reduced perimysium and endomysium was filled with fibrous tissue. Conclusions: Fibrosis without predominant myogenic regeneration was the major histological consequence of surgical tongue volume reduction.