Jacqueline Montagne

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Cell proliferation requires cell growth; that is, cells only divide after they reach a critical size. However, the mechanisms by which cells grow and maintain their appropriate size have remained elusive. Drosophila deficient in the S6 kinase gene (dS6K) exhibited an extreme delay in development and a severe reduction in body size. These flies had smaller(More)
The adaptation of growth in response to nutritional changes is essential for the proper development of all organisms. Here we describe the identification of the Drosophila homolog of the target of rapamycin (TOR), a candidate effector for nutritional sensing. Genetic and biochemical analyses indicate that dTOR impinges on the insulin signaling pathway by(More)
Synaptic circuitry in the rat lateral amygdala (AL) was studied in brain slices using electrophysiological recordings. Electrical stimulation of external and internal capsules evoked an EPSC followed by a sequence of GABA(A) and GABA(B) receptor-mediated IPSC in principal neurons. Paired stimulation of either afferents resulted in a significant reduction ((More)
The adult Drosophila wing is formed by an epithelial sheet, which differentiates into two non-neural tissues, vein or intervein. A large number of genes, many of them encoding components of an EGF-receptor signaling pathway, have previously been shown to be required for differentiation of vein tissue. Much less is known about the molecular control of(More)
The Drosophila homolog of the vertebrate serum response factor (SRF) was isolated by low stringency hybridization. Nucleotide sequence analysis revealed that the Drosophila SRF homolog (DSRF) codes for a protein that displays 93% sequence identity with human SRF in the MADS domain, the region required for DNA binding, dimerization and interaction with(More)
Palmitate oxidation by liver mitochondria from rats treated with D-galactosamine (GalN) was markedly inhibited, 3 h after administration. The mitochondrial defect responsible for this inhibition was shown to be an inhibition of the activity of palmitoylcarnitine transferase I (EC 2.3.1.21). Apparent Km of the enzyme remained unchanged whereas apparent V was(More)
The genes that encode the proteins composing the tuberous sclerosis complex (TSC) are tumor suppressors. Experiments in the model organism Drosophila melanogaster have provided insight into the identity of these genes and their functions in regulating cell size and proliferation. Montagne et al. describe the various genetic interactions that show TSC to be(More)
The effect of N-[(R,S)-2-benzyl-3[(S)-(2-amino-4-methylthio)butyldithiol]-1-oxopropyl]-L-phenylalanine benzyl ester (RB101), a dual inhibitor of the enkephalin-degrading enzymes, neutral endopeptidase and aminopeptidase N, was assessed in anaesthetised rats on the C-fibre reflex elicited by electrical stimulation within the sural nerve territory and(More)
A system of local rate equations combined with a ray-tracing technique is used for numerical analysis of energy storage within a Yb:Er:glass laser under diode pumping. It is shown that any pumping system could be characterized by relative pumping efficiency, which depends mainly on the pumping source parameters but only slightly on parameters of the(More)
Since the discovery of the cell as the minimal indivisible living entity, scientists have tried to understand how all the various physiological aspects were assumed within this single functional unit. One fascinating question concerns the role of cell size and cell number in determining the overall size of an organism. During the past century, increasing(More)