Planar polarity in primate cone photoreceptors: a potential role in Stiles Crawford effect phototropism

Autor: Verschueren, Anna, Boucherit, Leyna, Ferrari, Ulisse, Fouquet, Stéphane, Nouvel-Jaillard, Céline, Paques, Michel, Picaud, Serge, Sahel, José-Alain
Přispěvatelé: Institut de la Vision, Institut National de la Santé et de la Recherche Médicale (INSERM)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Centre d'investigation clinique Quinze-Vingts [CHNO] (CIC1423 - CIC QUINZE-VINGTS), Institut Hospitalo-Universitaire FOReSIGHT, Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre Hospitalier National d'Ophtalmologie des Quinze-Vingts (CHNO)-Sorbonne Université (SU)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre Hospitalier National d'Ophtalmologie des Quinze-Vingts (CHNO)-Sorbonne Université (SU), University of Pittsburgh Medical Center [Pittsburgh, PA, États-Unis] (UPMC), Fondation Ophtalmologique Adolphe de Rothschild [Paris], Gestionnaire, HAL Sorbonne Université 5
Jazyk: angličtina
Rok vydání: 2022
Předmět:
Zdroj: Communications Biology, Vol 5, Iss 1, Pp 1-13 (2022)
Communications Biology
Communications Biology, 2022, 5 (1), pp.89. ⟨10.1038/s42003-021-02998-y⟩
ISSN: 2399-3642
Popis: Human cone phototropism is a key mechanism underlying the Stiles-Crawford effect, a psychophysiological phenomenon according to which photoreceptor outer/inner segments are aligned along with the direction of incoming light. However, such photomechanical movements of photoreceptors remain elusive in mammals. We first show here that primate cone photoreceptors have a planar polarity organized radially around the optical center of the eye. This planar polarity, based on the structure of the cilium and calyceal processes, is highly reminiscent of the planar polarity of the hair cells and their kinocilium and stereocilia. Secondly, we observe under super-high resolution expansion microscopy the cytoskeleton and Usher proteins architecture in the photoreceptors, which appears to establish a mechanical continuity between the outer and inner segments. Taken together, these results suggest a comprehensive cellular mechanism consistent with an active phototropism of cones toward the optical center of the eye, and thus with the Stiles-Crawford effect.
Verschueren et al. expand our understanding of the Stiles-Crawford effect in mammals by using super-high resolution expansion microscopy of the adult macaque eye. They show that cone photoreceptors have a planar polarity organized radially around the optical center of the eye and that Usher proteins establish a mechanical continuity between the outer and inner segments, which sheds light on the Stiles-Crawford effect in this species.
Databáze: OpenAIRE
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