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Fig. 2 | BMC Developmental Biology

Fig. 2

From: High expressions of the cytoglobin and PGC-1α genes during the tissue regeneration of house gecko (Hemidactylus platyurus) tails

Fig. 2

Histological analysis of the tissue regeneration of the house gecko tails: aj. comparisons of the tissue growth of the house gecko tail tissue with that of the control, from day 1–30; a day 1, b day 3, c day 5, d day 8, e day 10, f day 13, g day 17, h day 21, i day 30, and j control. The growth of the epidermis (ep), dermis (d), muscle (m), and cartilage (ct) tissues differed in each phase of tissue regeneration: kt tissue regeneration of the house gecko tail; k on day 1, an epithelial layer (red arrow) formed and closed the wound—adipose tissue (black arrow) is shown above the dermis layer and cartilage tissue (yellow arrow) is near the adipose tissue; l the neuronal ganglion cells (red arrow) formed on day 3, surrounded by muscle tissue (black arrow); m on day 5, the blood vessels (red arrow) formed in the dermis (black arrow); n on day 8, the epidermal layer (red arrow) was thicker and the progenitor cell spread in the basal lamina (black arrow); kn were the histological analyses in the wound healing phase; o on day 10, the blood vessels (black arrow) enlarged and spread in the dermis (red arrow), the epidermis layer (yellow arrow) was thicker, and the basal lamina (blue arrow) was enriched with progenitor cells; p on day 13, the blastema cells (red arrow) aggregated in the connective tissue (black arrow), and the epidermis layer (yellow arrow) was thicker (days 10 to 13 were the blastema phase); q on day 17, the new blood vessels (black arrow) spread in the connective tissue (red arrow) (days 13–17 were the regeneration phase); r on day 21, the new adipose tissue (black arrow) and the new muscle tissue (red arrow) appeared in the regenerating tail tissue, and the epidermis (yellow arrow) grew thicker; s on day 30, the epidermis (black arrow) and new muscle (red arrow) became more compact and scales appeared on the epidermis layer (days 21–30 were the maturation phase;) t for the control—the non-autotomized tail tissue of the house geckothe scale (red arrow), the dermis (black arrow), and the muscle (yellow arrow) were more compact, at a magnification of 40 × 10. ux The graphs of the quantitative histological analyses of the regenerated house gecko tail tissue: u the density (/mm2) of the neuronal cells in regenerated tail tissue; v the density (/mm2) of the fibroblast-like cells in the regenerated tail tissue; w the thickness (mm) of the epidermis of the regenerated tail tissue; x the thickness (mm) of the dermis layer of the regenerated tail tissue

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