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Article

Artificial Infestation of Sarcoptes scabiei (Acari: Sarcoptidae) in Rabbits Exhibits Progressive Pathological Changes, Apoptosis, and Keratinization in the Skin

1
Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, China
2
Department of Chemistry, College of Life and Basic Science, Sichuan Agricultural University, Chengdu 611130, China
*
Authors to whom correspondence should be addressed.
These authors contributed equally to this work.
Int. J. Mol. Sci. 2023, 24(3), 2187; https://doi.org/10.3390/ijms24032187
Submission received: 16 December 2022 / Revised: 14 January 2023 / Accepted: 17 January 2023 / Published: 22 January 2023
(This article belongs to the Section Molecular Pathology, Diagnostics, and Therapeutics)

Abstract

Sarcoptes scabiei (S. scabiei) is an ectoparasite that can infest humans and 150 mammalian host species, primarily causing pruritus, crust, and alopecia. However, neither the pathological process of host skin under S. scabiei infection nor the mechanism of S. scabiei infection in regulating apoptosis and keratinization of host skin has been studied yet. In this study, a total of 56 rabbits were artificially infested with S. scabiei, and the skin samples were collected at seven different time points, including 6 h, 12 h, day 1, day 3, 1 week, 4 weeks, and 8 weeks, whereas a group of eight rabbits served as controls. We measured epidermal thickness by H&E staining, observed the skin ultrastructure by electron microscopy, and detected the degree of skin apoptosis by TUNEL staining. The level of transcription of genes related to apoptosis and keratinization was detected by quantitative real-time PCR (qRT-PCR), and the level of Bcl-2 protein expression was further detected using immunohistochemistry. Our results showed that, with increased infestation time, the epidermal layer of the rabbit skin exhibited significant thickening and keratinization, swollen mitochondria in the epidermal cells, and increased skin apoptosis. The level of caspase-1, 3, 8, 10, 14, and Bcl-2 mRNA expression was increased, whereas the level of keratin 1 and 5 was decreased after S. scabiei infestation. In conclusion, S. scabiei infestation causes thickening of the epidermis, which may be related to apoptosis-induced proliferation and skin keratinization.
Keywords: Sarcoptes scabiei; pathological changes; rabbits; skin; apoptosis; keratinization Sarcoptes scabiei; pathological changes; rabbits; skin; apoptosis; keratinization

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MDPI and ACS Style

Guan, K.; Xu, J.; Gu, X.; He, R.; Xie, Y.; Jing, B.; Peng, X.; Yang, G. Artificial Infestation of Sarcoptes scabiei (Acari: Sarcoptidae) in Rabbits Exhibits Progressive Pathological Changes, Apoptosis, and Keratinization in the Skin. Int. J. Mol. Sci. 2023, 24, 2187. https://doi.org/10.3390/ijms24032187

AMA Style

Guan K, Xu J, Gu X, He R, Xie Y, Jing B, Peng X, Yang G. Artificial Infestation of Sarcoptes scabiei (Acari: Sarcoptidae) in Rabbits Exhibits Progressive Pathological Changes, Apoptosis, and Keratinization in the Skin. International Journal of Molecular Sciences. 2023; 24(3):2187. https://doi.org/10.3390/ijms24032187

Chicago/Turabian Style

Guan, Ke, Jing Xu, Xiaobin Gu, Ran He, Yue Xie, Bo Jing, Xuerong Peng, and Guangyou Yang. 2023. "Artificial Infestation of Sarcoptes scabiei (Acari: Sarcoptidae) in Rabbits Exhibits Progressive Pathological Changes, Apoptosis, and Keratinization in the Skin" International Journal of Molecular Sciences 24, no. 3: 2187. https://doi.org/10.3390/ijms24032187

APA Style

Guan, K., Xu, J., Gu, X., He, R., Xie, Y., Jing, B., Peng, X., & Yang, G. (2023). Artificial Infestation of Sarcoptes scabiei (Acari: Sarcoptidae) in Rabbits Exhibits Progressive Pathological Changes, Apoptosis, and Keratinization in the Skin. International Journal of Molecular Sciences, 24(3), 2187. https://doi.org/10.3390/ijms24032187

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