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-A general introduction to developmental biology

How do cells build a multicellular animal organism from a single genome? Genotype/phenotype relationship.

-Genetic testing reminders

Nature of mutations (loss-of-function; gain-of-function), concept of "master gene," clonal analysis (generation of somatic or germline clones), concept of cellular autonomy....

-Genetic models and methods.

Study of regulatory regions, establishment of transgenic lines, enhancer traps, reporter genes (GFP, mCherry, etc.), model organisms (Drosophila, C. elegans, mice, etc.).Use of FLP/FRT, CRE-LOX, UAS-GAL4-GAL80, AttpP/B-PhiC31, CRISPR, etc. systems.

-Positional information, genes with maternal effects, and the establishment of asymmetry.

Models and mechanisms of positional information = induction, Spemann and Mangold's experiment, organizing centers, concept of morphogens in invertebrates and vertebrates

-Establishment of axes: anteroposterior, dorsoventral.

Genetic screens: genes with maternal effects and genes with zygotic effects. Cell communication and signaling pathways: in establishing the dorsoventral axis, in limb formation, in establishing cell fate (some examples: nervous system: lateral inhibition process, etc.).

-Segmentation: gap genes, pair rule genes, and segmental polarity genes.

Segmentation in invertebrates and somitogenesis in vertebrates, dynamic aspects (establishment and maintenance).

-Signaling and transcriptional networks

Transcriptional regulation during development, regulatory sequences during evolution, concept of gene networks. Coupling of transcription and signaling pathways in cell fate.

-Transcriptional program memory through epigenetic mechanisms:

Hox homeotic genes and segmental identity. Concepts of Evo-Devo. Polycomb and Trithorax complexes.

Involvement of epigenetic mechanisms during cell differentiation

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Three main topics are covered:

-Study of weight and thermal homeostasis in relation to a model of dysfunction: obesity. To this end, we will examine energy balance in terms of food intake and energy expenditure, comprising basal metabolism, physical activity, and adaptive thermogenesis (AT), and their respective regulation.

-Study of biological rhythms, via the description of the nature and properties of biological rhythms (ultradian, circadian, and infradian), the description of endogenous circadian oscillators, and a detailed presentation of the molecular mechanisms of circadian clocks.

-Study of the different stages and physiological principles of breathing. Theoretical teaching will be supplemented by tutorials. Tutorials are based on document studies and the analysis of scientific articles in English. The choice of different scientific materials aims to show the interaction between the various topics covered and thus the concept of integrative physiology.

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Neuromuscular physiology:

Skeletal striated muscle: The neuromuscular junction; Muscle contraction/relaxation; Myotypology; Plasticity; Muscle metabolism.

Neuromuscular diseases: Causes; symptoms; clinical diagnosis (clinical examinations; laboratory tests): EMG, blood tests, functional tests, etc.; Muscular dystrophies: Duchenne muscular dystrophy; Becker muscular dystrophy; facioscapulohumeral muscular dystrophy (FSHD). Facioscapulohumeral muscular dystrophy FSHD: zebrafish model; mouse model; cell models; clinical trials.

Respiratory physiology:

Respiratory physiology: Anatomy of the respiratory system; mechanism of respiration; gas exchange; transport of respiratory gases by the blood; regulation of respiration

Respiratory exploration in small animals: Why explore respiratory function in small animals? Plethysmography; in vitro contractile force.

Functional Respiratory Testing: performing and interpreting respiratory tests in human pathology; spirometry: Level 1 and Level 2; pulmonary diffusion capacity; arterial blood gases; specific testing of respiratory muscles; 6-minute walk test; exercise testing; testing at high altitude.

Cardiovascular physiology:

Reminders about the anatomy of the heart: size, location, and orientation; the heart's outer layer; layers of the heart wall; chambers and large vessels of the heart; blood flow through the heart; heart valves; blood supply to the heart: coronary circulation; properties of heart muscle tissue.

Review of heart physiology: regulation of the basic rhythm; cardiac conduction system; modification of the basic rhythm: extrinsic innervation of the heart; electrocardiography; mechanical phenomena: cardiac cycle; cardiac output; regulation of stroke volume; regulation of heart rate.

Review of vascular physiology: anatomy of the circulatory system; lymphatic system; vascular wall structure; blood pressure; vascular smooth muscle and vasomotor function; endothelial function.

Vascular function and dysfunction; functional testing: measurement of arterial distensibility; measurement of arterial wave velocity; pharmacological testing of endothelium-dependent vasomotor function; ultrasound testing; echo-tracking; ultrasound and Doppler ultrasound.

How can vascular function be evaluated experimentally? Isolated artery loop model Cardiac Doppler ultrasound: a fabulous tool in clinical and experimental research; Ultrasound: anatomical and functional analysis; Doppler: flow analysis; Application to animal models.

Translational research: example of myocardial ischemia-reperfusion (myocardial infarction); Animal models; isolated perfused heart (Langendorf); Isolated cardiomyocytes; Cardioprotection techniques.

Endocrinology: weight balance

Description of eating behavior; Energy balance; Central structures regulating food intake; Mechanisms regulating food intake; Factors modulating appetite and food intake; Nutritional assessment; Eating disorders; Functional exploration: impedance measurement; DEXA (dual-energy X-ray absorptiometry); MRI; assessment of energy expenditure: calorimetry.

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This course unit aims to provide a broad overview of emerging quantitative interdisciplinary fields in biosciences, ranging from cutting-edge experimental techniques in microscopy and synthetic biology to systemic approaches.

In an innovative way, these methodological aspects will be presented in the context of biological and biophysical concepts such as the robustness and optimality of biological systems, gene regulation, and the fundamental principles underlying the organization of membranes and the genome.

The main topics will first be introduced through traditional lectures and then developed through individual or team projects, where students will learn to apply specific techniques through examples and see how these can be used to explore specific biological questions. These projects will involve bibliographic studies, the use of existing code, or the development of new code (depending on the student's experience) and will constitute half of the final assessment.

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The EU will first address the main communication pathways between normal cells and intracellular transduction pathways encountered in physiological and neurophysiological mechanisms. Thus, G protein-coupled receptors (GPCRs) will be studied, namely their structure, function, and modulation by interaction proteins involved in particular in the phenomenon of desensitization. The main intracellular pathways activated by membrane GCRs will be addressed (MAP kinase pathways, PI3 kinase, etc.).

Next, a significant portion of the course will focus on calcium signaling and Ca2+ homeostasis, Ca2+ being a ubiquitous signal in cellular signaling. Calcium homeostasis will be studied in particular during the response of lymphocytes after antigen stimulation. Furthermore, the production of oxygen free radicals, which cause oxidative stress, is dependent on intracellular Ca2+. The physiological role of free radicals will be discussed, as well as their involvement in oxidative stress. In this context, the pathways of protection against oxidative stress will also be studied.The following chapter will address the endocannabinoid system, which will allow us to recap all the topics previously discussed in the course. The endocannabinoid system is responsible for multiple central and peripheral regulations.

Finally, two other topics will be addressed: the blood-brain barrier, which allows for highly integrated cellular communication between two environments, and the pancreatic β-cell, whose activity is crucial for regulating blood sugar levels through insulin secretion.

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