Related Experiment Video
Updated: Jul 17, 2025
14:56
Sample Preparation to Bioinformatics Analysis of DNA Methylation: Association Strategy for Obesity and Related Trait Studies
Published on: May 6, 2022
4.6K
Obesity and thinness: insights from genetics.
1Wellcome-MRC Institute of Metabolic Science, Addenbrooke's Hospital, Box 289, Cambridge CB2 0QQ, UK.
Summary
Genetic mutations affecting the hypothalamic leptin-melanocortin pathway cause severe obesity. Leptin hormone defends against starvation, with its absence intensifying hunger and food reward, highlighting appetite
Area of Science:
- Neuroendocrinology
- Genetics
- Metabolic Regulation
Background:
- The hypothalamic leptin-melanocortin pathway is crucial for weight regulation.
- Genetic disruptions in this pathway lead to severe obesity in animal models and humans.
- Leptin, an adipose-derived hormone, plays a key role in defending against starvation.
Purpose of the Study:
- To explore the physiological role of leptin in appetite regulation.
- To investigate the biological basis of human appetite through genetic studies.
- To identify molecular targets for obesity treatment.
Main Methods:
- Analysis of genetic mutations in hypothalamic leptin-melanocortin pathway components.
- Physiological studies in individuals with relevant genetic mutations.
- Examination of clinical and population-based cohorts with obesity or thinness.
Main Results:
- Lack of leptin signaling results in an intense drive to eat.
- Leptin deficiency enhances the rewarding properties of food.
- Genetic studies reveal insights into weight regulation mechanisms.
Conclusions:
- Human appetite has a strong biological basis, significantly influenced by leptin.
- Understanding the leptin-melanocortin pathway is vital for addressing obesity.
- Genetic insights offer potential molecular targets for weight loss therapies.
Related Concept Videos
01:28Human Genetics
611
Human genetics provides a profound framework for understanding the interplay between genetic predispositions and human psychology. At the heart of this discipline lies the study of how genes influence physical traits, behaviors, and susceptibility to diseases. Each person carries a unique genetic code that subtly or significantly shapes their psychological and behavioral landscape.
The complex relationship between genetics and psychology is observable through common biological components such...
The complex relationship between genetics and psychology is observable through common biological components such...
611
01:23Behavioral Genetics and Its Designs
405
Behavior genetics explores how genetic inheritance influences human behavior. It focuses on how genes, passed from parents to offspring, contribute to the development of behavioral traits and tendencies. This branch of genetics seeks to understand the complex interplay between inherited genetic factors and environmental influences in shaping our behaviors.
The primary methodologies used in behavior genetics include family studies, twin studies, and adoption studies, each providing unique...
The primary methodologies used in behavior genetics include family studies, twin studies, and adoption studies, each providing unique...
405
01:24Obesity
534
The Body Mass Index (BMI) is a numerical value derived from a person's weight and height, used to categorize individuals into weight ranges. It is calculated using the formula: weight in kilograms divided by height in meters squared. Obesity is a health condition characterized by excessive accumulation of adipose tissue that poses health risks, often diagnosed with a BMI ≥ 30. This excess fat storage occurs when surplus dietary calories are converted into triglycerides and stored in...
534
01:28Anorexia Nervosa
143
Anorexia nervosa is a complex and severe eating disorder characterized by an intense fear of weight gain, an unrelenting pursuit of thinness, and a distorted body image. It often leads to dangerously low body weight relative to an individual's age and height. This disorder is marked by significant physical and psychological consequences, making it one of the most life-threatening psychiatric illnesses.
Symptoms and Physical Effects
Individuals with anorexia nervosa commonly exhibit extreme...
Symptoms and Physical Effects
Individuals with anorexia nervosa commonly exhibit extreme...
143
01:18Polygenic Traits
66.0K
When more than one gene is responsible for a given phenotype, the trait is considered polygenic. Human height is a polygenic trait. Studies have uncovered hundreds of loci that influence height, and there are believed to be many more. Due to the high number of genes involved, as well as environmental and nutritional factors, height varies significantly within a given population. The distribution of height forms a bell-shaped curve, with relatively few individuals in the population at the...
66.0K
01:10Nature and Nurture
20.5K
Many human characteristics, like height, are shaped by both nature—in other words, by our genes—and by nurture, or our environment. For example, chronic stress during childhood inhibits the production of growth hormones and consequently reduces bone growth and height. Scientists estimate that 70-90% of variation in height is due to genetic differences among individuals, and 10-30% of variation in height is due to differences in the environments that individuals experience,...
20.5K