Imaging of Organ Metabolism in Obesity and Diabetes: Treatment Perspectives

J C Hannukainen, M A Guzzardi, K A Virtanen

  • 1Institute of Clinical Physiology, National Research Council (CNR), Via Moruzzi 1, 56124, Pisa, Italy. patricia.iozzo@ifc.cnr.it.

Insights

Imaging organ metabolism helps understand obesity and diabetes complications. This approach aids in identifying therapeutic targets for cardiovascular diseases and heart failure, improving patient outcomes.

Area of Science:

  • Cardiovascular Medicine
  • Metabolic Disorders
  • Medical Imaging

Background:

  • Obesity and diabetes are significant risk factors for cardiovascular diseases (CVD) and heart failure.
  • Understanding the sequence of events from health to these conditions is crucial for effective prevention and treatment.

Purpose of the Study:

  • To review the role of in vivo organ-specific metabolic imaging in understanding the pathogenesis of obesity and diabetes.
  • To highlight how imaging aids in identifying culprits and monitoring treatment responses for cardio-metabolic complications.

Main Methods:

  • Review of advancements in imaging modalities for evaluating organ-specific metabolism in humans.
  • Synthesis of findings from imaging studies on the heart, skeletal muscle, adipose tissue, liver, pancreas, gut, and brain.

Main Results:

  • Imaging advances risk stratification and identifies organ-specific factors in obesity and diabetes.
  • Organ-specific metabolic imaging provides insights into pathogenesis and treatment monitoring for CVD.

Conclusions:

  • Imaging of multiple organs is vital for understanding cardio-metabolic diseases.
  • Emerging areas include cardiac fat, brown adipose tissue conversion, brain's role in energy balance, omics-imaging integration, and gut microbiome metabolism.

Related Concept Videos

Diabetes: Management and Pharmacotherapy01:15

Diabetes: Management and Pharmacotherapy

The therapy for diabetes aims to alleviate hyperglycemia-related symptoms, prevent acute metabolic decompensation, and reduce chronic end-organ complications. Glycemic control is evaluated through short-term (self-monitoring, continuous glucose monitoring) and long-term (A1c, fructosamine) metrics, enabling near real-time tracking of blood glucose levels and reflecting glycemic control over specific time frames.
Insulin remains the cornerstone of treatment for most patients with type 1 and many...
1.5K
Type II Diabetes II: Pathophysiology01:24

Type II Diabetes II: Pathophysiology

PathophysiologyType 2 diabetes mellitus (T2DM ) is a chronic metabolic disorder characterized by insulin resistance and progressive pancreatic β-cell dysfunction, leading to impaired glucose homeostasis. It results from interactions among genetic predisposition, environmental factors, and metabolic stressors, such as overnutrition and a sedentary lifestyle.Insulin Resistance and Glucose DysregulationEarly T2DM involves insulin resistance in skeletal muscle, adipose tissue, and the liver.
28
Pharmacokinetics in Obese Patients: Drug Metabolism and Excretion01:20

Pharmacokinetics in Obese Patients: Drug Metabolism and Excretion

Drug metabolism, a critical process in the liver, involves two primary phases: Phase I reactions and Phase II conjugation. Obesity introduces significant alterations in this metabolic process, primarily due to fatty infiltration of the liver, leading to conditions such as nonalcoholic fatty liver disease (NAFLD). This condition can modify the activities of both Phase I and II enzymes, impacting how drugs are metabolized in obese patients.Phase I metabolism sees variable effects across...
324
Carbohydrate Metabolism01:36

Carbohydrate Metabolism

Carbohydrates are polymers composed of molecules containing atoms of carbon, hydrogen and oxygen. One gram of carbohydrate can provide four kilo-calories of energy, which makes it the most efficient instant energy source.
Starch accounts for approximately 60% of the carbohydrates consumed by humans. Since amylase enzymes cannot function in the stomach's acidic environment, starch can only be digested in the mouth and small intestine. Simple sugars are found naturally in milk and fruits in...
10.4K
Pathophysiology of Diabetes01:20

Pathophysiology of Diabetes

Diabetes mellitus is a chronic metabolic disorder characterized by hyperglycemia. The four categories of diabetes are type 1 diabetes, type 2 diabetes, other specific types of diabetes, and gestational diabetes.
Type 1 diabetes is characterized by autoimmune-mediated destruction of pancreatic β cells, with environmental factors potentially triggering this process in genetically susceptible individuals. Despite many not having a family history, certain genes increase susceptibility,...
3.9K
Type I Diabetes II: Pathophysiology01:26

Type I Diabetes II: Pathophysiology

Type 1 diabetes mellitus arises from an immune-mediated destruction of pancreatic β-cells, resulting in an absolute deficiency of insulin. This process develops in genetically susceptible individuals when autoimmunity, environmental exposures, and immunologic dysregulation converge to trigger a targeted attack on the insulin-producing cells of the pancreas. The β-cells are located within the islets of Langerhans and are essential for regulating blood glucose by facilitating cellular...
75