Polat Hasan, Grande Gianfranco, Aurangzeb Zeenat, Zhang Huiming, Daghfous Gheylen, Dubuc Réjean, Zielinski Barbara
Department of Integrative Biology, University of Windsor, Windsor, ON, Canada.
Department of Biomedical Sciences, University of Windsor, Windsor, ON, Canada.
J Comp Physiol A Neuroethol Sens Neural Behav Physiol. 2025 Jan;211(1):1-17. doi: 10.1007/s00359-024-01708-3. Epub 2024 Jul 30.
Little is known about the chemosensory system of gustation in sea lampreys, basal jawless vertebrates that feed voraciously on live prey. The objective of this study was to investigate taste bud distribution and chemosensory responses along the length of the pharynx in the sea lamprey. Scanning electron microscopy and immunocytochemistry revealed taste buds and associated axons at all six lateral pharyngeal locations between the seven pairs of internal gill pores. The most rostral pharyngeal region contained more and larger taste buds than the most caudal region. Taste receptor cell responses were recorded to sweet, bitter, amino acids and the bile acid taurocholic acid, as well as to adenosine triphosphate. Similar chemosensory responses were observed at all six pharyngeal locations with taste buds. Overall, this study shows prominent taste buds and taste receptor cell activity in the seven pharyngeal regions of the sea lamprey.
对于海七鳃鳗（一种以活猎物为食的无颌基干脊椎动物）的味觉化学感应系统，人们了解甚少。本研究的目的是调查海七鳃鳗咽部不同位置的味蕾分布和化学感应反应。扫描电子显微镜和免疫细胞化学分析显示，在七对内鳃孔之间的所有六个咽外侧位置都有味蕾和相关轴突。最靠前的咽部区域比最靠后的区域含有更多、更大的味蕾。记录了味觉受体细胞对甜味、苦味、氨基酸、胆汁酸牛磺胆酸以及三磷酸腺苷的反应。在所有六个有味蕾的咽部位置都观察到了类似的化学感应反应。总体而言，本研究表明海七鳃鳗的七个咽部区域存在明显的味蕾和味觉受体细胞活性。
