Lecture

Energy Metabolism: Sex Differences

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In course

BIO-450: Molecular endocrinology: health and environment

We will define homeostasis, principles of hormone action and the molecular mechanisms underlying them to illustrate the complexities of physiological regulation. Human interactions with the environment, pertinent public health issues and their causes and p ...

Description

This lecture explores how men and women have evolved differently in terms of energy storage and consumption, leading to differences in fat distribution, fertility, and metabolic processes. It delves into the biological mechanisms behind the oxidation of lipids in women and the carbohydrate-based metabolism in men, highlighting the advantages of lipid storage and the distinct properties of white and brown adipose tissues.

Instructor

Cathrin Brisken

Cathrin Brisken, MD, PhD, is Associate Professor of Life Sciences at the Swiss Federal Institute of Technology Lausanne (EPFL). Dr. Brisken is internationally recognized for her work on endocrine control of mammary gland development and breast carcinogenesis. Dr. Brisken received her MD and her PhD degree in Biophysics from the Georg August University of Göttingen, Germany. She completed her postdoctoral work in cancer biology with Dr. R.A. Weinberg at the Whitehead Institute of Biomedical Research in Cambridge, MA, USA. She previously held appointments at the Cancer Center of the Massachusetts General Hospital, Harvard Medical School, Boston and the Swiss Institute for Experimental Cancer Research (ISREC). Research in Dr. Brisken’s laboratory focuses on the cellular and molecular underpinnings of estrogen and progesterone receptor signaling in the breast and the respective roles of these hormones and hormonally active compounds in carcinogenesis. The aim is to understand how recurrent exposures to endogenous and exogenous hormones contribute to breast carcinogenesis in order to better prevent and treat the disease. The laboratory has pioneered in vivo approaches to genetically dissect the role of the reproductive hormones in driving mouse mammary gland development and shown how they control intercellular communication. Dr. Brisken’s group has developed ex vivo and humanized mouse models using patient samples to study hormone action in human tissues in normal settings and during disease progression. Dr. Brisken is member of the International Breast Cancer Study Group (IBCSG) Biological Protocol Working Group. She served as Dean of EPFL Doctoral School (more than 2000 PhD students in 18 PhD programs), as member of the Hinterzartener Kreis, the oncology think-tank associated with the German Science Foundation, and numerous Swiss, European, and AACR committees. She co-founded the International Cancer Prevention Institute.

Official source

Related concepts (22)

Metabolism

Metabolism (məˈtæbəlɪzəm, from μεταβολή metabolē, "change") is the set of life-sustaining chemical reactions in organisms. The three main functions of metabolism are: the conversion of the energy in food to energy available to run cellular processes; the conversion of food to building blocks for proteins, lipids, nucleic acids, and some carbohydrates; and the elimination of metabolic wastes. These enzyme-catalyzed reactions allow organisms to grow and reproduce, maintain their structures, and respond to their environments.

Lipid metabolism

Lipid metabolism is the synthesis and degradation of lipids in cells, involving the breakdown and storage of fats for energy and the synthesis of structural and functional lipids, such as those involved in the construction of cell membranes. In animals, these fats are obtained from food and are synthesized by the liver. Lipogenesis is the process of synthesizing these fats. The majority of lipids found in the human body from ingesting food are triglycerides and cholesterol.

Bioenergetics

Bioenergetics is a field in biochemistry and cell biology that concerns energy flow through living systems. This is an active area of biological research that includes the study of the transformation of energy in living organisms and the study of thousands of different cellular processes such as cellular respiration and the many other metabolic and enzymatic processes that lead to production and utilization of energy in forms such as adenosine triphosphate (ATP) molecules.

Lipid

Lipids are a broad group of organic compounds which include fats, waxes, sterols, fat-soluble vitamins (such as vitamins A, D, E and K), monoglycerides, diglycerides, phospholipids, and others. The functions of lipids include storing energy, signaling, and acting as structural components of cell membranes. Lipids have applications in the cosmetic and food industries, and in nanotechnology.

Beta oxidation

In biochemistry and metabolism, beta oxidation (also β-oxidation) is the catabolic process by which fatty acid molecules are broken down in the cytosol in prokaryotes and in the mitochondria in eukaryotes to generate acetyl-CoA, which enters the citric acid cycle, and NADH and FADH2, which are co-enzymes used in the electron transport chain. It is named as such because the beta carbon of the fatty acid undergoes oxidation to a carbonyl group.

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