- Be careful while adding the hydrolysis enzyme mix. Make sure
to add the 2μl inside the solution and not on the side and mix
well. Quick plate centrifugation is recommended to bring
down the solution inside the wells. Proceed quickly at this
step to avoid long exposure to light. - Prepare the reading parameters during the 30 min develop-
ment. Be careful with the choice of the plate on the ELISA
reader machine. It is recommended to take two consecutive
readings and average both results. - Normalizing to accurate protein measurements is very impor-
tant. Error in the levels of protein content highly influences the
results.
Acknowledgments
We acknowledge salary support to E.P. from the Rolande and
Marcel Gosselin Graduate Studentship and the CIHR/FRSQ
training grant in cancer research of the McGill Integrated Cancer
Research Training Program (MICRTP). The work was supported
by grants to A.P. from the Myrovlytis Trust, the Terry Fox Research
Foundation, and the Kidney Foundation of Canada.
References
- Braeckman BP (2009) Intermediary metabo-
lism. 16 February 2009 edn., wormbook.
doi:10.1895 - Adeva-Andany MM, Gonzalez-Lucan M,
Donapetry-Garcia C et al (2016) Glycogen
metabolism in humans. BBA Clin 5:85–100 - Roach PJ, Depaoli-Roach AA, Hurley TD,
Tagliabracci VS (2012) Glycogen and its
metabolism: some new developments and old
themes. Biochem J 441:763–787 - Jensen J, Lai YC (2009) Regulation of muscle
glycogen synthase phosphorylation and kinetic
properties by insulin, exercise, adrenaline and
role in insulin resistance. Arch Physiol Biochem
115:13–21 - Roach PJ (2002) Glycogen and its metabolism.
Curr Mol Med 2:101–120 - Jensen TE, Richter EA (2012) Regulation of
glucose and glycogen metabolism during and
after exercise. J Physiol 590:1069–1076 - Gowans GJ, Hardie DG (2014) AMPK: a cel-
lular energy sensor primarily regulated by
AMP. Biochem Soc Trans 42:71–75 - Hardie DG (2014) AMPK: positive and nega-
tive regulation, and its role in whole-body
energy homeostasis. Curr Opin Cell Biol
33C:1–7
- Hardie DG, Ashford ML (2014) AMPK: reg-
ulating energy balance at the cellular and whole
body levels. Physiology (Bethesda) 29:99–107 - Carling D, Hardie DG (1989) The substrate
and sequence specificity of the AMP-activated
protein kinase. Phosphorylation of glycogen
synthase and phosphorylase kinase. Biochim
Biophys Acta 1012:81–86 - Jorgensen SB, Nielsen JN, Birk JB et al (2004)
The alpha2-5^0 AMP-activated protein kinase is a
site 2 glycogen synthase kinase in skeletal mus-
cle and is responsive to glucose loading. Diabe-
tes 53:3074–3081 - Wojtaszewski JF, Jorgensen SB, Hellsten Y et al
(2002) Glycogen-dependent effects of 5-ami-
noimidazole-4-carboxamide (AICA)-riboside
on AMP-activated protein kinase and glycogen
synthase activities in rat skeletal muscle. Diabe-
tes 51:284–292 - Miyamoto L, Toyoda T, Hayashi T et al (2007)
Effect of acute activation of 5^0 -AMP-activated
protein kinase on glycogen regulation in
isolated rat skeletal muscle. J Appl Physiol
(1985) 102:1007–1013
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