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Behavioral and Neural Responses to Vitamin C Solution in Vitamin C-deficient Osteogenic Disorder Shionogi/Shi Jcl-od/od Rats.
Chemical Senses ( IF 2.8 ) Pub Date : 2019-05-21 , DOI: 10.1093/chemse/bjz028
Toshiaki Yasuo 1 , Takeshi Suwabe 1 , Noritaka Sako 1
Affiliation  

To investigate the appetite for vitamin C (VC), we conducted behavioral and neural experiments using osteogenic disorder Shionogi/Shi Jcl-od/od (od/od) rats, which lack the ability to synthesize VC, and their wild-type controls osteogenic disorder Shionogi/Shi Jcl- +/+ (+/+) rats. In the behavioral study, rats were deprived of VC for 25 days and then received two-bottle preference tests with a choice between water and 10 mM VC. The preference for 10 mM VC solution of od/od rats was significantly greater than that of +/+ rats. In the neural study, the relative magnitudes of the whole chorda tympani nerve (CTN) responses to 100-1000 mM VC, 3-10 mM HCl, 100-1000 mM NaCl, and 20 mM quinine▪HCl in the VC-deficient rats were significantly smaller than those in the nondeficient ones. Further, we conducted additional behavioral experiments to investigate the appetite for sour and salty taste solutions of VC-deficient od/od rats. Preference scores for 3 mM citric acid increased in od/od rats after VC removal, compared with before, whereas preference scores for 100 and 150 mM NaCl were decreased in VC-deficient od/od rats. The preference for 300 mM NaCl was not changed. Hence, our results suggest that the reduction of the aversive taste of VC during VC deficiency may have involved the reduction of CTN responses to acids. Overall, our results indicate that VC-deficient rats ingest sufficient VC to relieve their deficiency and that VC deficiency causes changes in peripheral sensitivity to acids, but nongustatory factors may also affect VC intake and choice.

中文翻译:

缺乏维生素C的成骨性疾病Shionogi / Shi Jcl-od / od大鼠对维生素C溶液的行为和神经反应。

为了研究对维生素C(VC)的食欲,我们使用成骨性疾病Shionogi / Shi Jcl-od / od(od / od)大鼠进行了行为和神经实验,这些大鼠缺乏合成VC的能力,并且它们的野生型控制成骨性Shionogi / Shi Jcl- + / +(+ / +)大鼠。在行为研究中,大鼠被剥夺VC 25天,然后接受两瓶偏好测试,选择水和10 mM VC。od / od大鼠对10 mM VC溶液的偏爱显着大于+ / +大鼠。在神经研究中,VC缺乏大鼠中对100-1000 mM VC,3-10 mM HCl,100-1000 mM NaCl和20 mM奎宁·HCl的整个脊索神经(CTN)响应的相对强度为显着小于无缺陷的那些。进一步,我们进行了其他行为实验,以研究缺乏VC的od / od大鼠的酸味和咸味溶液的食欲。VC去除后,od / od大鼠中3 mM柠檬酸的偏好得分比之前增加,而VC缺失od / od大鼠中100和150 mM NaCl的偏好得分降低。300 mM NaCl的偏好保持不变。因此,我们的结果表明,在VC缺乏期间VC厌恶味的减少可能与CTN对酸的反应减少有关。总的来说,我们的结果表明,缺乏VC的大鼠会摄入足够的VC来缓解其不足,并且VC缺乏会引起周围酸的外周敏感性发生变化,但非味觉因素也会影响VC的摄取和选择。VC去除后,od / od大鼠中3 mM柠檬酸的偏好得分比之前增加,而VC缺失od / od大鼠中100和150 mM NaCl的偏好得分降低。300 mM NaCl的偏好保持不变。因此,我们的结果表明,在VC缺乏期间VC厌恶味的减少可能与CTN对酸的反应减少有关。总的来说,我们的结果表明,缺乏VC的大鼠会摄入足够的VC来缓解其不足,并且VC缺乏会引起周围酸的外周敏感性发生变化,但非味觉因素也会影响VC的摄取和选择。VC去除后,od / od大鼠中3 mM柠檬酸的偏好得分比之前增加,而VC缺失od / od大鼠中100和150 mM NaCl的偏好得分降低。300 mM NaCl的偏好保持不变。因此,我们的结果表明,在VC缺乏期间VC厌恶味的减少可能与CTN对酸的反应减少有关。总的来说,我们的结果表明,缺乏VC的大鼠会摄入足够的VC来缓解其不足,并且VC缺乏会引起周围酸的外周敏感性发生变化,但非味觉因素也会影响VC的摄取和选择。300 mM NaCl的偏好保持不变。因此,我们的结果表明,在VC缺乏期间VC厌恶味的减少可能与CTN对酸的反应减少有关。总的来说,我们的结果表明,缺乏VC的大鼠会摄入足够的VC来缓解其不足,并且VC缺乏会引起周围酸的外周敏感性发生变化,但非味觉因素也会影响VC的摄取和选择。300 mM NaCl的偏好保持不变。因此,我们的结果表明,在VC缺乏期间VC厌恶味的减少可能与CTN对酸的反应减少有关。总的来说,我们的结果表明,缺乏VC的大鼠会摄入足够的VC来缓解其不足,并且VC缺乏会引起周围酸的外周敏感性发生变化,但非味觉因素也会影响VC的摄取和选择。
更新日期:2019-11-01
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