Gilles J. Guillemin

Gilles J. Guillemin (born January 1967) is an Australian neuroscientist. He received the Ordre national du Mérite in 2019 in recognition of his work in medical research.

In 2024, The final report cleared Prof Guillemin of research misconduct. Today he works in private research industry.

Life Born in Dijon, France in January 1967, Guillemin moved to Australia in 1997 to pursue post-doctoral studies after he obtained a PhD in Neurovirology from the University of Burgundy.

Career Guillemin has been working in the field of Neuroimmunology since then, with a focus on tryptophan metabolism research.

Guillemin started his career as a senior research scientist at St Vincent's Private Hospital (1997-2003), then he became an associate professor at the University of New South Wales (2003-2012). He was co-director of the centre from 2011 to 2016. As part of his work at the centre, Guillemin and his group study "the involvement of tryptophan in MND" and focus on neuroinflammation and neurotoxicity.

Guillemin has been studying the involvement of tryptophan catabolism (via the kynurenine pathway- KP B) in human neurodegenerative diseases for more than 20 years. Guillemin and his teams have conducted research that demonstrates the importance of the KP in multiple sclerosis, Alzheimer's disease and motor neuron disease, which has diagnostic, prognostic and therapeutic potential. This research has been extended to looking at the chemicals in the brain and their relation to other diseases such as depression, suicide, autism and cancers.

Guillemin is part of a research group working on neuroactive (toxic or protective) metabolites derived from tryptophan. The study built on the results of previous research by Guillemin that demonstrated excessive amounts of QUIN accumulate within the human brain of Alzheimer's and motor neuron disease (MND) patients.

As an extension of his research on tryptophan and QUIN, Guillemin has also conducted research into Multiple Sclerosis (MS), including a project that discovered the first blood biomarker for MS. The result of the project was the identification of a biomarker that can discriminate between the three subtypes of MS with 85-90 percent accuracy, allowing for a more accurate diagnosis of MS in patients.

Guillemin has been the Editor-in-Chief of The International Journal on Tryptophan Research between 2008-2022

He was appointed as a professor of neuroscience at Macquarie University in 2012. A report on the preliminary investigation was published in November 2023, indicating there was indeed a potential breach of the university's research code. Gilles Guillemin claimed that certain images in his papers appear to have been doctored, but not by him Prof Guillemin acknowledged that certain images in these manuscripts appear to have been doctored, however not by him or his team.. Most of the retractions were done at the request of Prof Guillemin. It is important to highlight that ALL the scientific work reported in these retracted manuscripts was not performed in Prof Guillemin’s laboratory or by any member of his research team but by external collaborators.

Pandis In 2018, Guillemin co-created PANDIS with Catherine Stace. PANDIS is an Australian not-for-profit organisation.

The aim of the organisation is to identify "infectious pathogens in Australian patients with various types of chronic diseases," called PAN for "All" and DIS for "diseases", with a focus on tick-borne diseases.

Motor Neurone Disease BioBank In 2012, Guillemin, with his colleague Dominic Rowe, co-created the first motor neuron disease biobank in Australia.

The Motor Neurone Disease (MND) Biobank houses samples that are then available to for use in research projects. One such project was conducted by Guillemin and his team around the analysis of the blood plasma of Amyotrophic lateral sclerosis patients to find ways to improve diagnosis.

Community engagement Guillemin was involved in "STEM Professionals in Schools" a CSIRO Education program where he shares his experience as a scientist to primary and secondary school students, from 2009 to 2017. 2014–2020: Elected President of the International Society of Tryptophan research (ISTRY) 2014- : Chairman, Scientific Advisory Board, Metabrain Research (France) 2019, November: Awarded "Chevalier de l'Ordre du Mérite (Knight of the Order of Merit) " by the French government in recognition of his work in medical research 2020, March: Awarded a Fellowship of The Royal Society of New South Wales. 2021, June: Awarded a Member of the Order of Australia "for significant service to science education, to Motor Neurone Disease research, and to sport".