ArticleThe Journal of veterinary medical science2018
Testicular regulation of seasonal change in apocrine glands in the back skin of the brown bear (Ursus arctos).
Article in The Journal of veterinary medical science, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed, 7 citations in OpenAlex.
- Morphological and histological features of abdominal glands in Japanese marten (Martes melampus).PloS one · 2025Article
- Morphological and biochemical characterization of Holstein cow skin at the tail root region susceptible to Chorioptes bovis and texanus parasitism.The Journal of veterinary medical science · 2024Article
- Brown bear skin-borne secretions display evidence of individuality and age-sex variation.Scientific reports · 2023Article
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Authors and funding
9 authors at 5 institutions in 1 country.
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No grant is acknowledged in the PubMed record.
Abstract
Brown bears communicate with other individuals using marking behavior. Bipedal back rubbing has been identified as a common marking posture. Oily substances are secreted via enlarged sebaceous glands in the back skin of male bears during the breeding season. However, whether apocrine gland secretions are associated with seasonal changes remains unknown. The present study aimed to identify histological and histochemical changes in the secretory status and the glycocomposition of the apocrine glands in the back skin of male bears in response to changes in seasons and/or reproductive status. The apocrine glands of intact males during the breeding season were significantly larger and more active than those of castrated males during the breeding season and those of intact males during the non-breeding season. Lectin histochemical analyses revealed a more intense reaction to Vicia villosa agglutinin (VVA) in the cytoplasm, mainly Golgi zones of apocrine cells during the breeding season among castrated, compared with intact males. Positive staining for VVA was quite intense and weak in intact males during the non-breeding and breeding seasons, respectively. Ultrastructural analysis revealed VVA positivity in the Golgi zone, especially around secretory granules in apocrine cells. Changes in lectin binding might reflect a change in the secretory system in the apocrine cells. The present histological and histochemical findings of changes in the secretory status and glycocomposition of the apocrine glands according to the season and reproductive status suggest that these glands are important for chemical communication.
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