Circadian rhythms are such an innate part of our lives that we rarely pause to speculate why they even exist. Some studies have suggested that the disruption of the circadian system may be causal for obesity and manifestations of Metabolic Syndrome (MetS). Shift-work, sleep-deprivation and bright-light-exposure at night are related to increased adiposity (obesity) and prevalence of MetS. It has been provided evidence of clock genes expression in human adipose tissue and demonstrated its association with different components of the MetS. Moreover, current studies are illustrating the particular role of different clock genes variants and their predicted haplotypes in MetS.

The purpose of Chronobiology and Obesity is to describe the mechanisms implicated in the interaction between chonodisruption and metabolic-related illnesses, such as obesity and MetS, with different approaches."

The development of new methodologies has played a key role in the advancement of all areas of research. Specifically, the initial advances in our understanding of lipoprotein structure and metabolism were made possible by the development of ultracentrifugation and electrophoretic techniques. More recently, the advent of molecular biological techniques opened possibilities that were unthinkable just a few decades ago. The use of the analytical ult- centrifuge to study plasma lipoproteins began in the 1940s with the work of Mutzenbecher, McFarlene, Pedersen, Gofman, Lindgren, and Elliot. Another crucial step, during the 1950s, was the development of this tool as a prepa- tive technique by Havel, Eder, and Bragdon, among others. This technolo- cal progress allowed investigators to "dig" deeper into the structure of these complex macromolecules made of lipids and proteins, and permitted inves- gators to continue unraveling the physical and chemical characteristics of the proteins associated with lipoprotein particles (apolipoproteins) and the enzymes involved in their processing. This information led to both a better understanding of the biological functions of the lipoprotein fractions and their constituents, and creation of a more comprehensive overall scheme for plasma lipoprotein metabolism. Several gaps in this puzzle were filled through the work of Goldstein and Brown, who elucidated the structure and role of the low-density lipoprotein - ceptor. This was the first identified among a profusion of receptors that are key for the cellular catabolism of these particles.

Circadian rhythms are such an innate part of our lives that we rarely pause to speculate why they even exist. Some studies have suggested that the disruption of the circadian system may be causal for obesity and manifestations of Metabolic Syndrome (MetS). Shift-work, sleep-deprivation and bright-light-exposure at night are related to increased adiposity (obesity) and prevalence of MetS. It has been provided evidence of clock genes expression in human adipose tissue and demonstrated its association with different components of the MetS. Moreover, current studies are illustrating the particular role of different clock genes variants and their predicted haplotypes in MetS. The purpose of "Chronobiology and Obesity" is to describe the mechanisms implicated in the interaction between chonodisruption and metabolic-related illnesses, such as obesity and MetS, with different approaches.

The development of new methodologies has played a key role in the advancement of all areas of research. Specifically, the initial advances in our understanding of lipoprotein structure and metabolism were made possible by the development of ultracentrifugation and electrophoretic techniques. More recently, the advent of molecular biological techniques opened possibilities that were unthinkable just a few decades ago. The use of the analytical ult- centrifuge to study plasma lipoproteins began in the 1940s with the work of Mutzenbecher, McFarlene, Pedersen, Gofman, Lindgren, and Elliot. Another crucial step, during the 1950s, was the development of this tool as a prepa- tive technique by Havel, Eder, and Bragdon, among others. This technolo- cal progress allowed investigators to "dig" deeper into the structure of these complex macromolecules made of lipids and proteins, and permitted inves- gators to continue unraveling the physical and chemical characteristics of the proteins associated with lipoprotein particles (apolipoproteins) and the enzymes involved in their processing. This information led to both a better understanding of the biological functions of the lipoprotein fractions and their constituents, and creation of a more comprehensive overall scheme for plasma lipoprotein metabolism. Several gaps in this puzzle were filled through the work of Goldstein and Brown, who elucidated the structure and role of the low-density lipoprotein - ceptor. This was the first identified among a profusion of receptors that are key for the cellular catabolism of these particles.