January 2019

ScienceSignalingCover.jpeg

A big Congratulations to Elise Needham and Sean Humphrey along with Tim Burykin from the Life Lab for their review article that was published in Science Signaling. Their paper was accompanied by the Front Cover and a Focus article by the Editor Mike Yaffe from Harvard.

The article describes why Cancer research and research into other complex diseases must shift more toward biochemistry and analysis of signal transduction as this represents the disease coal face.

See full article

***


January 2019

Farewell to two of our lab members - Dr Benjamin Parker and Dr Tim Su!

Ben will be heading to the University of Melbourne where he has been appointed as a group leader. Tim has been appointed as the Assistant Director at ChemPartner Co in Shanghai.

We wish them both all the best for the future. They will be missed around the lab

***


AlexisDiaz.png

January 2019

We would like to welcome both Dr Alexis Diaz and Dr Soren Madsen who have both joined the James Lab as a Postdoctoral Research Associates.

Alexis obtained his Ph.D. in Biomedical Science working with Dr. Enrique Jaimovich in the Muscle Physiology Lab, Faculty of Medicine, University of Chile. During this time, Alexis learnt about the adult skeletal muscle physiology and its metabolic alteration in diet-induced insulin resistance.
In 2018 Alexis won a research fellow to work in mitochondrial metabolism in neonatal cardiomyocyte with Dr. Sergio Lavandero, in the Advanced Center of Chronic Diseases, University of Chile. He was also the national head of the human physiology undergraduate course to Medical Doctor, School of Medicine, University Andrés Bello, Chile.

SorenMadsen_photo.jpg

Soren completed his PhD in 2018 at the University of Copenhagen with Sara Vienberg and Jonas Treebak at CBMR Integrative Physiology. During Soren’s PhD research he studied adipose tissue biology in relation to metabolic stress, such as high-fat diet and exercise. More specifically he was interested in how miRNA matures during times of low or high energy states, as it has become apparent that miRNAs are dysregulated in metabolic disease.
Soren’s current project investigates how genes and environment affect the progression of insulin resistance. Soren’s main focus is on adipose tissue and trying to identify genetic drives that impair glucose uptake into fat.

It is great to have you both on board!

***


December 2018

Big Congratulations to all of the following lab members who have achieved some special things recently.

What a great way to wrap up 2018!!

  • Dr Benjamin Parker has been appointed as a group leader at the University of Melbourne starting in 2019

  • Dr Daniel Fazakerley has been appointed as a group leader at Cambridge University starting in May 2019

  • Our PhD student Elise Needham won the best student oral presentation of the year at the Charles Perkins Centre Biology Domain Seminar Series.

  • Sean Humphrey and his wife are expecting a little baby in January.  Go Sean!

  • James Krycer won the Skip Martin fellowship for 2019. 

  • Daniel Fazakerely received a DART grant.

  • Well done to Guang Yang on his EMBO J paper on RagC phosphorylation

***


July 2018

Membrane Topology of Trafficking Regulator of GLUT4 1 (TRARG1).

Duan et al. describe the membrane topology of trafficking regulator of GLUT1 (TRARG1; formally known as TUSC5). We previously identified TRARG1 as a regulator of GLUT4 trafficking in 2015 (click here)

Duan X, Krycer JR, Cooke KC, Yang G, James DE, Fazakerley DJ.

See full article

***


July 2018

Muscle and adipose tissue insulin resistance: malady without mechanism?

Fazakerley, Krycer et al. review mechanisms of muscle and adipose insulin resistance.

Fazakerley DJ, Krycer JR, Kearney AL, Hocking SL, James DE.

See full article

***


May 2018

Mitochondrial oxidative stress causes insulin resistance without disrupting oxidative phosphorylation.

Our collaboration with Mike Murphy (University of Cambridge) and Richard Hartley (University of Glasgow) using a novel compound to show that mitochondrial oxidative stress rapidly induces insulin resistance independently of changes in mitochondrial respiration.

Fazakerley DJ, Minard AY, Krycer JR, Thomas KC, Stöckli J, Harney DJ, Burchfield JG, Maghzal GJ, Caldwell ST, Hartley RC, Stocker R, Murphy MP, James DE.

See full article

***


February 2018

Mitochondrial CoQ deficiency is a common driver of mitochondrial oxidants and insulin resistance.

Fazakerley et al. identify that loss of mitochondrial CoQ is a proximal driver of mitochondrial oxidants and insulin resistance.
See featured on 7News - Click here
See featured in the eLife podcast - Click here

Fazakerley DJ, Chaudhuri R, Yang P, Maghzal GJ, Thomas KC, Krycer JR, Humphrey SJ, Parker BL, Fisher-Wellman KH, Meoli CC, Hoffman NJ, Diskin C, Burchfield JG, Cowley MJ, Kaplan W, Modrusan Z, Kolumam G, Yang JY, Chen DL, Samocha-Bonet D, Greenfield JR, Hoehn KL, Stocker R, James DE.

see full article

***


January 2018

A gas trapping method for high-throughput metabolic experiments

Krycer et al. developed a novel gas-trapping method for high-throughput metabolic experiments. Adapted for cells grown in 12- or 24-well plates, this can be used to measure substrate oxidation by collecting CO2 or hydrogen sulphide production from cysteine metabolism.

Krycer JR, Diskin C, Nelson ME, Zeng XY, Fazakerley DJ, James DE

See full article

***


January 2018

The transcriptional response to oxidative stress is part of, but not sufficient for, insulin resistance in adipocytes

It is well-established that reactive oxygen species (ROS) are linked to insulin resistance. Chaudhuri, Krycer et al. found that although ROS induces substantial changes across the transcriptional landscape in adipocytes, this transcriptional response is not required for ROS to cause insulin resistance. This suggests that ROS acts via other ‘omes, such as post-translational modifications, to cause insulin resistance in adipocytes.

Chaudhuri R, Krycer JR, Fazakerley DJ, Fisher-Wellman KH, Su Z, Hoehn KL, Yang JYH, Kuncic Z, Vafaee F, James DE.

See full article

***


December 2017

Dynamic Metabolomics Reveals that Insulin Primes the Adipocyte for Glucose Metabolism

Krycer et al. explored how insulin regulates adipocyte metabolism. It is widely-held that energy storage (anabolism) occurs as a substrate accumulates. However, using dynamic tracer metabolomics and overlaying phosphoproteomics data, they found insulin signalling triggers anabolism before substrates accumulated, creating a ‘demand-driven’ system to prime adipocytes for glucose metabolism.

Krycer JR, Yugi K, Hirayama A, Fazakerley DJ, Quek LE, Scalzo R, Ohno S, Hodson MP, Ikeda S, Shoji F, Suzuki K, Domanova W, Parker BL, Nelson ME, Humphrey SJ, Turner N, Hoehn KL, Cooney GJ, Soga T, Kuroda S, James DE

See full article

***


December 2017

Editor's pick at JBC!

Metabolomic analysis of insulin resistance across different mouse strains and diets     

"Insulin resistance is a complex condition with many genetic and environmental determinants. Stöckli et al carried out a comprehensive metabolomic analysis of three different mouse strains on high-fat or standard diets. The analysis showed that, despite individual, environmental, and genetic variation, a combination of three metabolites (C22:1-CoA, C2-carnitine, and C16-ceramide) together formed an accurate signature for predicting insulin resistance."           

Jacqueline Stöckli, Kelsey H. Fisher-Wellman, Rima Chaudhuri, Xiao-Yi Zeng, Daniel J. Fazakerley, Christopher C. Meoli, Kristen C. Thomas, Nolan J. Hoffman, Salvatore P. Mangiafico, Chrysovalantou E. Xirouchaki, Chieh-Hsin Yang, Olga Ilkayeva, Kari Wong, Gregory J. Cooney, Sofianos Andrikopoulos, Deborah M. Muoio, and David E. James

See full article

***


December 2017

Multiplexed Temporal Quantification of the Exercise-regulated Plasma Peptidome

The latest paper by Parker et al. has been one the most highly viewed article of the Journal of Molecular & Cellular Proteomics during the past month!                  

Benjamin L. Parker, James G. Burchfield, Daniel Clayton, Thomas A. Geddes, Richard J. Payne, Bente Kiens, Jørgen F. P. Wojtaszewski, Erik A. Richter and David E. James

See full article

***