Dionne
Welcome to the Dionne lab!
That is to say, Marc Dionne's lab, at Imperial College London; not to be confused with any other Dionne lab.
We are interested in the ways in which host genotype affects the biology of bacterial infection. Drosophila melanogaster is our animal model of choice.
Work in the lab has been funded by the Biotechnology and Biological Sciences Research Council, the Wellcome Trust, and the Medical Research Council.
A BBSRC-funded postdoctoral position is available in the lab! If you're interested, get in touch, or apply here!
Metabolic-immune interaction and host genetics in infection
It has been known for centuries that chronic infections cause systemic metabolic disruption, but it is fundamentally unclear why and how these events are linked. Does metabolic disruption somehow facilitate the host response to infection? If so, how? We address these fundamental biological questions by analyzing pathogenic infections and their consequences in the fruit-fly Drosophila melanogaster. We use classical Drosophila genetics, computational analysis and modeling of gene expression, biochemistry, and intravital microscopy to probe the metabolic-immune interface.
One pathogen of particular interest to us is Mycobacterium marinum. We have previously shown that flies infected with M. marinum exhibit progressive loss of metabolic stores accompanied by mild hyperglycemia. We have shown that these effects are caused, in part, by systemic disruption of signaling via the anabolic effector kinases Akt and p70 S6 kinase. The transcription factor MEF2 responds to nutrient signals to regulate expression of both immune effectors and anabolic enzymes. Remarkably, though MEF2 promotes the expression of both groups of genes, its choice of targets is regulated by a conserved phosphorylation that alters its affinity for the TATA binding protein. It appears that the disruption of anabolic kinase activity may be required to permit MEF2 to drive the antibacterial response. This work has recently been published in Cell.
Ongoing work continues to explore other metabolic inputs into MEF2, other targets of MEF2 in its two discrete physiological states, and the pathways by which infection disrupts anabolic kinase activity.
Cytokines and cytokine signalling
In the course of screening for mutants with defective responses to M. marinum, we find a lot of molecules and pathways that end up being involved in cytokine signalling and its consequences. Cytokines regulate the realized immune response of the fly, much as they do in mammals; they also can be significant direct drivers of pathology due to effects on immune and nonimmune target tissues. However, very little is known about the biology of cytokines in Drosophila melanogaster, especially in the context of bacterial infections.
Some time back, we showed that two different TGF-betas regulate fly immunity, each inhibiting a specific arm of the immune response, and each being produced by only a subset of phagocytes. Check it out!
We've also done some exciting work in collaboration with Frederic Geissmann's lab on the role of JAK-STAT signalling in flies on a high-fat diet; you can read about it here. We continue to work on the roles of this pathway in Mycobacterium marinum infection and in muscle physiology—we hope to be able to say more about these soon.
<wikionly>
Recent updates to the lab wiki
- N
- This edit created a new page (also see list of new pages)
- m
- This is a minor edit
- b
- This edit was performed by a bot
- (±123)
- The page size changed by this number of bytes
7 March 2021
6 March 2021
09:11 | Chenlab:Contact diffhist -2 Kaifu Chen talk contribs |
|
09:08 | Chenlab:Lab Members 6 changes history -1,030 [Kaifu Chen (6×)] | |||
|
09:08 (cur | prev) -22 Kaifu Chen talk contribs | ||||
|
09:06 (cur | prev) 0 Kaifu Chen talk contribs | ||||
|
09:04 (cur | prev) -12 Kaifu Chen talk contribs | ||||
|
09:04 (cur | prev) +6 Kaifu Chen talk contribs | ||||
|
09:03 (cur | prev) -6 Kaifu Chen talk contribs | ||||
|
09:03 (cur | prev) -996 Kaifu Chen talk contribs |
08:32 | HRV:Journal diffhist +218 Rjvickery talk contribs →Week 16 |
08:29 | Upload log Rjvickery talk contribs uploaded File:ClinicianSurveyResults.pdf |
5 March 2021
m 10:05 | Griffin:CRISPR diffhist +160 Korey Griffin talk contribs →CRISPR (Clustered Regularly Interspaced Short Palindromic Repeats) Cas Nuclease |
07:51 | Template:Gao lab diffhist -9 Xinyu Liu talk contribs |
4 March 2021
|
18:47 | Li Lab 3 changes history +278 [Wei Li Bcm (3×)] | |||
|
18:47 (cur | prev) +1 Wei Li Bcm talk contribs →Recent News | ||||
|
18:47 (cur | prev) +77 Wei Li Bcm talk contribs →Recent News | ||||
|
10:44 (cur | prev) +200 Wei Li Bcm talk contribs →Recent News |
18:44 | Silver: 2021 Meeting Schedule diffhist +18 PamSilver talk contribs →March |
|
m 15:53 | Griffin:siRNA transfection 2 changes history +605 [Korey Griffin (2×)] | |||
m |
|
15:53 (cur | prev) +69 Korey Griffin talk contribs →Suspension Cells | |||
m |
|
15:52 (cur | prev) +536 Korey Griffin talk contribs →Suspension Cells |
14:59 | User creation log User account Panepucci talk contribs was created by Yar talk contribs and password was sent by email |
m 14:17 | Griffin:Lentivirus Technology diffhist +207 Korey Griffin talk contribs →Lentivirus Transduction Protocol |
|
10:42 | Li Lab:People 3 changes history -207 [Wei Li Bcm (3×)] | |||
|
10:42 (cur | prev) -280 Wei Li Bcm talk contribs | ||||
|
10:42 (cur | prev) +10 Wei Li Bcm talk contribs | ||||
|
10:42 (cur | prev) +63 Wei Li Bcm talk contribs |
08:51 | File:Tram.jpg diffhist +12 Trmhuynh talk contribs |
08:44 | Upload log Trmhuynh talk contribs uploaded File:Tram.jpg |
|
m 07:53 | Senecio Research Network 2 changes history +730 [Richard J. Abbott (2×)] | |||
m |
|
07:53 (cur | prev) -9 Richard J. Abbott talk contribs →Recent Publications | |||
m |
|
07:51 (cur | prev) +739 Richard J. Abbott talk contribs →Recent Publications |
m 07:31 | User:Richard J. Abbott diffhist +250 Richard J. Abbott talk contribs →Publications |
3 March 2021
|
m 14:27 | Griffin: Ultimate Immunoprecipitation Guide 2 changes history +844 [Korey Griffin (2×)] | |||
m |
|
14:27 (cur | prev) -1 Korey Griffin talk contribs →Common RIPA components | |||
m |
|
14:27 (cur | prev) +845 Korey Griffin talk contribs →Common RIPA components |
|
N 12:04 | User:Ppresh.ant 2 changes history +1,215 [Ppresh.ant (2×)] | |||
m |
|
12:04 (cur | prev) +4 Ppresh.ant talk contribs | |||
N |
|
12:02 (cur | prev) +1,211 Ppresh.ant talk contribs Created a description pate |
|
11:59 | Talk:TOP10 chemically competent cells 4 changes history +222 [Ppresh.ant (4×)] | |||
|
11:59 (cur | prev) -2 Ppresh.ant talk contribs →Comments | ||||
|
11:56 (cur | prev) +9 Ppresh.ant talk contribs →Comments | ||||
|
11:53 (cur | prev) +29 Ppresh.ant talk contribs →Comments: minor edit | ||||
m |
|
11:52 (cur | prev) +186 Ppresh.ant talk contribs →Comments: Suggested changing the title of the protocol |
|
10:26 | Chenlab:Lab Members 2 changes history +142 [Kaifu Chen (2×)] | |||
|
10:26 (cur | prev) +148 Kaifu Chen talk contribs | ||||
|
10:21 (cur | prev) -6 Kaifu Chen talk contribs |
10:14 | Chenlab:News diffhist +136 Kaifu Chen talk contribs |
09:46 | Tomlinson:LabMeeting diffhist +79 Ryan E. Tomlinson talk contribs |
|
08:51 | Chenlab:Publications 3 changes history +507 [Kaifu Chen (3×)] | |||
|
08:51 (cur | prev) +7 Kaifu Chen talk contribs | ||||
|
08:49 (cur | prev) -4 Kaifu Chen talk contribs | ||||
|
08:48 (cur | prev) +504 Kaifu Chen talk contribs |
2 March 2021
22:22 | Yeo lab:meetings diffhist +1 Yoonyeo talk contribs |
11:05 | Chenlab:Contact diffhist +90 Kaifu Chen talk contribs |
05:01 | HRV:Signal Processing diffhist +654 Rjvickery talk contribs →Evolution of our Code |
|
04:58 | (Upload log) [Rjvickery (4×)] | |||
|
04:58 Rjvickery talk contribs uploaded File:Npeaks4.PNG | ||||
|
04:58 Rjvickery talk contribs uploaded File:Npeaks3.PNG | ||||
|
04:57 Rjvickery talk contribs uploaded File:Npeaks2.PNG | ||||
|
04:57 Rjvickery talk contribs uploaded File:Npeaks1.PNG |
</wikionly>
<nonwikionly> This page was created using Open Wetware.</nonwikionly>