TY - JOUR

T1 - Imiquimod does not elicit inflammatory responses in the skin of the naked mole rat (Heterocephalus glaber)

AU - Kisipan, Mosiany Letura

AU - Ojoo, Rodi Omondi

AU - Kanui, Titus I.

AU - Abelson, Klas S.P.

PY - 2020/9/5

Y1 - 2020/9/5

N2 - Objective: Naked mole rat (Heterocephalus glaber) has recently attracted interest in biomedical research due to its exceptional longevity, cancer resistance and tolerance to potentially harmful conditions or stimuli. Given its unique attributes, this study was designed to characterize inflammatory skin reactions of this animal to topical application of imiquimod, a toll-like receptor 7 and 8 agonist that triggers psoriasis-like skin reaction. Results: Imiquimod did not cause the expected psoriasis-like skin changes. There was no epidermal thickening and a straight epidermo-dermal boundary was maintained. There was no parakeratosis and the granular layer of epidermis was well formed. In the dermis, there was no leukocyte infiltration. This points to an exceptional nature of inflammatory/immune responses of this animal, but the mechanism could not be explained by our results. Naked mole rat could be a valuable negative model for studying psoriasis and other inflammatory skin conditions but as a prerequisite, there is need for further investigations to establish the mechanisms behind its lack of response to imiquimod.

AB - Objective: Naked mole rat (Heterocephalus glaber) has recently attracted interest in biomedical research due to its exceptional longevity, cancer resistance and tolerance to potentially harmful conditions or stimuli. Given its unique attributes, this study was designed to characterize inflammatory skin reactions of this animal to topical application of imiquimod, a toll-like receptor 7 and 8 agonist that triggers psoriasis-like skin reaction. Results: Imiquimod did not cause the expected psoriasis-like skin changes. There was no epidermal thickening and a straight epidermo-dermal boundary was maintained. There was no parakeratosis and the granular layer of epidermis was well formed. In the dermis, there was no leukocyte infiltration. This points to an exceptional nature of inflammatory/immune responses of this animal, but the mechanism could not be explained by our results. Naked mole rat could be a valuable negative model for studying psoriasis and other inflammatory skin conditions but as a prerequisite, there is need for further investigations to establish the mechanisms behind its lack of response to imiquimod.

KW - Imiquimod

KW - Inflammation

KW - Naked mole rat

KW - Negative model

KW - Psoriasis

KW - Skin

U2 - 10.1186/s13104-020-05260-6

DO - 10.1186/s13104-020-05260-6

M3 - Journal article

C2 - 32891181

AN - SCOPUS:85090376000

VL - 13

JO - BMC Research Notes

JF - BMC Research Notes

SN - 1756-0500

M1 - 416

ER -