Meanwhile, RJ contains several components that have been suggested to have antioxidant property: hydroxydecanoic acid; free amino acids, such as proline, cystine, and cysteine; flavonoids; and phenolic compounds [ 22 , 23 , 24 ]. Previous studies suggested that oxidative stress plays an important role in AMPK activation in skeletal muscle and then the use of antioxidants might affect AMPK activation [ 25 , 26 ].
Therefore, we examined the effects of a single dose of RJ and endurance exercise on the activation of the AMPK signaling cascade. Collectively, the effect of RJ treatment on the endurance training-induced increase in the maximal activities of mitochondrial enzymes in soleus seems to be mediated by the AMPK signaling amplification.
On the other hand, no effect of RJ treatment was observed on the phosphorylation levels of AMPK signaling cascade proteins in plantaris and TA muscles. They reported that casein peptide treatment increased the phosphorylation in the AMPK regulatory site in the soleus, while no effect was observed in the plantaris [ 6 , 8 ].
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However, the mechanism behind the effect of these nutrients on the differential activation levels of AMPK activation in different skeletal muscles with distinct fiber type composition has not yet been elucidated. Leucine is one of the potential activators of AMPK in skeletal muscles [ 7 ]. A previous study showed that the uptake of glutamate, which indicates a simultaneous efflux against leucine, was lower in the soleus compared with those in flexor digitorum brevis and epitrochlearis muscles, which are predominantly made of fast-twitch fibers [ 29 ].
As the intracellular glutamine contributes to the leucine uptake as an exchange material, thus the lower glutamine uptake in the soleus would not induce leucine uptake into muscles. Moreover, a recent study demonstrated that the expression level of the L-type amino acid transporter 1 LAT1 , which is thought to be a primary transporter of neutral amino acids including branched chain amino acids leucine, valine, isoleucine , was higher in the type II fiber than in the type I fiber [ 30 ]. Therefore, it is quite unlikely that the observed differential response to RJ treatment in soleus , plantaris , and TA muscles is due to the difference in amino acids transport into the cells particularly leucine.
To date, no study has compared the effect of hydroxydecenoic acid and other components of RJ on AMPK activation in different muscle fibers. Further studies are warranted to elucidate the mechanism behind the differential response to the RJ components in different skeletal muscles with discrete types of muscle fibers.
In human vastus lateralis muscles, which is frequently used in human studies, the percentage of type I and type IIA fibers correspond to those in the mice soleus muscle [ 31 , 32 ]. Therefore, the possibility exists that effect of RJ treatment combined with endurance training might be observed in human skeletal muscles. We provided mice with 1.
Montgomery the Royal Mouse (eBook) by patricia f. smith (Author)
It is recommended that the dose of drug or nutrient is converted across animal species based on the body surface area [ 33 ]. According to the calculation method proposed by Reagan-Shaw et al. This amount of RJ intake corresponds to that used in the previous study, in which elderly people received RJ for one year [ 34 ]. In that study, no side effect of RJ intake was reported. To our knowledge, no study has examined the effect of RJ treatment on endurance training-induced mitochondrial adaptations in human.
Further research is needed to elucidate whether three weeks of RJ treatment with endurance training shows beneficial effect for inducing mitochondrial adaptations in human. The study also reveals the possible role of AMPK activation upon RJ treatment on mitochondrial adaptations concomitant with endurance exercise. Moreover, we also demonstrated the difference in response to RJ treatment according to the difference in the composition of muscle fibers.
Conceptualization, Y. All authors approved the final version of the manuscript. The authors declare no conflict of interest. The funders had no role in the design of the study; collection, analyses, or interpretation of the data; manuscript preparation, or in the decision to publish the results. National Center for Biotechnology Information , U. Journal List Nutrients v.
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Published online Nov Author information Article notes Copyright and License information Disclaimer. Received Oct 17; Accepted Nov 9. Abstract We investigated the effect of royal jelly RJ , a natural secretion from worker bees, on the endurance training-induced mitochondrial adaptations in skeletal muscles of ICR mice. Keywords: endurance training, mitochondrial enzymes, phospho-AMPK, royal jelly, skeletal muscle. Introduction Mitochondria are important organelles that produce the adenosine triphosphate ATP required for the contraction of skeletal muscles.
Materials and Methods 2. Experimental Procedures 2. Table 1 Composition of the freeze-dried royal jelly powder per g. Open in a separate window. Analytical Methods 2. Muscle Homogenization Protein isolation from the muscles was performed as described previously [ 17 ]. Western Blotting Western blotting was performed as described previously [ 17 , 20 ].
Results 3. Chronic Experiment 3. Food Consumption and Body Weight The mice were weighed post-treatment and the results suggested that neither the endurance training nor the RJ treatment had a significant effect on their final body weight at the end of the experiment. Table 2 Body weight and food consumption of mice. Figure 1. Figure 2. Acute Experiment Phosphorylation Status of the Proteins Involved in Mitochondrial Biogenesis In order to study the role of RJ treatment in mitochondrial biogenesis, we further investigated the effects of acute RJ treatment combined with endurance exercise on the phosphorylation status of the crucial signaling proteins.
Figure 3. Figure 4. Figure 5. Author Contributions Conceptualization, Y. Funding This research was financially supported by Yamada Research Grant grant number: Conflicts of Interest The authors declare no conflict of interest. References 1. Holloszy J. Biochemical adaptations in muscle. Effects of exercise on mitochondrial oxygen uptake and respiratory enzyme activity in skeletal muscle. Fitts R. Skeletal muscle respiratory capacity, endurance, and glycogen utilization. Ibebunjo C. Cell Biol. Montgomery M. Mitochondrial dysfunction and insulin resistance: An update. Cell Metab. Matsunaga Y.
Pre-exercise casein peptide supplementation enhances endurance training-induced mitochondrial enzyme activity in slow twitch muscle, but not fast twitch muscle of high fat diet-fed mice. Liang C.
Takikawa M. Food Res. Watadani R. Yoshida M. Ljubicic V. Specific attenuation of protein kinase phosphorylation in muscle with a high mitochondrial content. Augusto V. Skeletal muscle fiber types in C57Bl6J mice. Denies M. Diet-induced obesity alters skeletal muscle fiber types of male but not female mice.
Montgomery The Royal Mouse
Kammoun M. A simplified immunohistochemical classification of skeletal muscle fibres in mouse. Niu K. Kitaoka Y. Nrf2 deficiency does not affect denervation-induced alterations in mitochondrial fission and fusion proteins in skeletal muscle. Srere P. Citrate oxaloacetate-lyase CoA-acetylating ] Methods Enzymol. Bass A. Metabolic differentiation of distinct muscle types at the level of enzymatic organization.
Sign in. See what IMDb users are playing. Title: Cat and Mouse 20 Apr Nick investigates the failed attempt to murder feral Ian Harmon, who seeks help from ex-lover Rosalee, who brings in Monroe, who turns to Nick. Waltz stops at nothing, threatening with city-wide slaughter and kidnapping Rosalee to get his prey, but Nick, Ian and Monroe still fight back, for once overruling human law. Written by KGF Vissers. A man named Ian Hamon is being hunted down by the Verrat's agent Edgar Waltz and is wounded at Portland's bus station by a bullet and loses his backpack. Waltz meets Captain Renard seeking for help to capture Ian but his request is turned down.
Meanwhile, Ian, who belongs to the Wesen Resistance, goes to the spice shop and Rosalee, who was his lover in the past, calls Monroe to help her to remove the bullet. Waltz kills a man and leaves Ian's passport in the crime scene to force Renard to chase him.
When Nick arrives at the spice shop, he tries to attest Ian, but Rosalee and Monroe testify that he was unconscious with them when the man was murdered. Soon Waltz confronts Nick while Ian needs a new passport to leave the country. Nick has to take a decision and cross the line as a police detective. Now his knowledge of the Grimm world interferes with his professional life and it is visible that he does not totally agree with his last attitude. My vote is eight. Start your free trial. Find showtimes, watch trailers, browse photos, track your Watchlist and rate your favorite movies and TV shows on your phone or tablet!
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Cat and Mouse
External Sites. User Reviews. User Ratings. External Reviews. Metacritic Reviews. Photo Gallery. Trailers and Videos. Crazy Credits. Alternate Versions. Grimm — Rate This. Season 1 Episode All Episodes He finds the feral hit-man Edgar Waltz is a Watch Now With Prime Video. Episodes Watched from
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