• Abstract

    Mammals, especially humans, have limited regenerative abilities compared to lower organisms. The common house gecko (Hemidactylus platyurus) exhibits high regenerative capacity and closer evolutionary relationship to mammals than other highly regenerative species. Observing the regeneration process in house gecko reveals insights into the biological mechanisms underlying tissue regeneration after injury. Sonic hedgehog (Shh) pathway is essential for intercellular communication during development and regeneration. In this study, Shh expression and its distribution during the tail regeneration in the common house gecko (Hemidactylus platyurus) were examined to understand the molecular mechanisms regulating regeneration. A total of 28 house geckos were divided into 7 groups based on sampling time. Autotomy procedures were conducted for all groups. The tails were allowed to regenerate, measured using graph paper, and cut to be analyzed. Hematoxylin-eosin and immunohistochemical staining using anti-Shh primary antibody were conducted to observe the microscopic structure and Shh expression. Statistical analyses were conducted to analyze the obtained data. Tail elongation was observed throughout the regeneration process. Shh expression is evident in both original and regenerated tails, commencing on day 1 post autotomy, peaking on day 14, stabilizing until day 21, and gradually decreasing by day 30. Statistical analysis showed significant differences on tail length measurement and Shh expression between groups (p < 0.001). The results showed strong positive correlation between Shh expression and regenerated tail length from day 1 to day 14 (R=0.818; p<0.001). Additionally, strong negative correlation was observed between Shh expression and regenerated tail length from day 21 to day 30 (R=-0.852; p<0.001). Shh protein is detected in a variety of cell types within both original and regenerated tail tissues. It plays critical role in maintaining tissue homeostasis in adult tissues and facilitating the proliferation, migration, and differentiation of blastema cells in response to injury.

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Pratiwisitha, M., Margiana, R., Sadikin, M., & Jusuf, A. A. (2025). Understanding <em>Sonic hedgehog</em> (<em>Shh</em>) expression and its distribution in common house gecko (<em>Hemidactylus platyurus</em>) tail regeneration. Multidisciplinary Science Journal, 7(9), 2025370. https://doi.org/10.31893/multiscience.2025370
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