Administration of theanine, a unique amino acid in tea leaves, changed feeding-relating components in serum and feeding behavior in rats.
نویسندگان
چکیده
We identified an effect of gamma-glutamylethylamide (theanine) on feeding in a rat study. Oral theanine suppressed the food intake of rats. The serum glucose level did not differ from the control, but the insulin concentration was reduced and the corticosterone concentration was increased by theanine. We suggest that the effect of theanine on feeding involved hormones.
منابع مشابه
Effects of theanine, a unique amino acid in tea leaves, on memory in a rat behavioral test.
We identified an effect of theanine on memory functions in a novel object test. Rats were fed theanine for 3 weeks ad libitum, and then they performed the object test. The theanine-fed group performed search behavior for the novel object in the test session. The results suggest that theanine-fed rats showed improved recognition, and that theanine affected learning and memory.
متن کاملEffect of in ovo feeding of amino acids and dextrose solutions on hatchability, body weight, intestinal development and liver glycogen reserves in newborn chicks
Early development of the digestive tract is crucial for achieving maximal growth and development of chickens. This study examined the effects of in ovo (IO) feeding of 0.70 mL of dextrose (10.00% and 20.00%) or amino acids solutions into the yolk sac at day 14 of incubation on small intestine histomorphometry and histomorphology, intestinal development, hatchability, body weight, and l...
متن کاملRoots of Hydroponically Grown Tea (Camellia sinensis) Plants as a Source of a Unique Amino Acid, Theanine
The beneficial effects of green tea are well documented. However, most research has reported the effects of green tea brewed solely from leaves or leaf extracts. We focused on tea roots and developed a hydroponic system to explore the effect on roots that biosynthesize one of the rarest functional amino acids, theanine. The level of theanine in tea roots was much higher than in leaves, which wa...
متن کاملThe effect of silver nanoparticles on the taste feeding behavior of Acipenser persicus to some Amino acids
The aim of this study was to evaluate the effects of silver nanoparticles (AgNPs) on taste feeding behavior of Persian sturgeon (Acipenser persicus) juveniles, including taste palatability index, fishing efficiency and the number of consumed pellets, to some amino acids. Taste Feeding behavior was investigated following exposure to 0.01, 0.005 and 0.001 mg L-1 AgNPs for 21 (each group with 3 re...
متن کاملInfluence of alkylamides of glutamic acid and related compounds on the central nervous system. I. Central depressant effect of theanine.
In 1949, Sakato2) isolated an amino acid, theanine (L-GluNHEt), from Japanese tea leaves and identified it as N-ethylglutamine amide. The presence of L-GluNHEt in other varieties of tea was confirmed by Cartwright, et al.3) And L-GluNHEt has been thought to be a flavourous constituent of tea leaves. On the other hand, caffeine, a central stimulant, has been known to be a pharmacological active ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Bioscience, biotechnology, and biochemistry
دوره 72 5 شماره
صفحات -
تاریخ انتشار 2008