The distribution of the calcium-binding protein calretinin (CR) was examined by an immunohistochemical method using specific antibodies. CR is involved in the visual system, and the inferior lobe of the hypothalamus represents a multisensory integration center in cichlids. The focus of the present study was to analyze the distribution of CR immunoreactivity in a cichlid fish, the firemouth cichlid, Thorichthys meeki, for the hypothalamic inferior lobe and for the torus lateralis, nucleus glomerulosus, nucleus posterior tuberis, and corpus mamillare as associated nuclei of the hypothalamus. CR-immunoreactive (CR-ir) cell bodies were visualized in the lateral and medial part of the diffuse nucleus of the inferior lobe, ventral portion of the central nucleus of the inferior lobe, torus lateralis, nucleus glomerulosus, and nucleus posterior tuberis. CR-ir fibers could be detected in the dorsal portion of the central nucleus of the inferior lobe and corpus mamillare. The strongest labeling of CR-ir neuropil was observed in the lateral part of the diffuse nucleus of the inferior lobe, outer zone of the periventricular nucleus of the inferior lobe, torus lateralis, nucleus glomerulosus, and nucleus posterior tuberis. CR is abundantly present in the inferior lobe of the hypothalamus and associated nuclei. The role of CR in highly active processes in the inferior lobe of cichlids will be discussed.

中文翻译：

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Calretinin 在下丘脑下叶和火嘴慈鲷相关细胞核中的免疫反应性，Thorichthys meeki

通过使用特异性抗体的免疫组织化学方法检查钙结合蛋白钙视网膜蛋白 (CR) 的分布。CR 参与视觉系统，下丘脑下叶代表慈鲷的多感觉整合中心。本研究的重点是分析慈鲷鱼、火嘴慈鲷、Thorichthys meeki、下丘脑下叶和外侧圆环、肾小球核、后结节核和乳头状体作为相关核的 CR 免疫反应性分布的下丘脑。在下叶弥漫核的外侧和内侧部分、下叶中央核的腹侧部分、外侧圆环、肾小球核和后结节核中可见 CR 免疫反应 (CR-ir) 细胞体。在下叶和乳头状体中央核的背侧可检测到 CR-ir 纤维。在下叶弥漫核的外侧部分、下叶脑室周围核的外区、外侧圆环、肾小球核和后结节核中观察到最强的 CR-ir 神经纤维标记。CR 大量存在于下丘脑下叶和相关细胞核中。将讨论 CR 在慈鲷下叶高活性过程中的作用。外侧圆环、肾小球核和后结节核。CR 大量存在于下丘脑下叶和相关细胞核中。将讨论 CR 在慈鲷下叶高活性过程中的作用。外侧圆环、肾小球核和后结节核。CR 大量存在于下丘脑下叶和相关细胞核中。将讨论 CR 在慈鲷下叶高活性过程中的作用。