Medical Genetic EP.7 | Inherited Metabolic Disorder

Welcome back to the Medical Genetics series! In this episode, we explore Inherited Metabolic Disorders (IMD), also known as Inborn Errors of Metabolism. We break down the complex biochemical pathways to understand how single-gene mutations disrupt enzyme function, leading to toxic accumulation or energy deficiency. In this video, we cover: Introduction to IMD: Understanding the basic mechanism—enzyme deficiency leading to substrate buildup and product deficiency. Classification of Metabolic Disorders: Small Molecule Disorders: Rapid onset, toxins that cross the blood-brain barrier (e.g., PKU, MSUD, Urea Cycle Defects). Large Molecule Disorders: Gradual accumulation within cells leading to organ enlargement (e.g., Lysosomal Storage Diseases like Gaucher and MPS). Energy Metabolism Disorders: Impacting high-energy organs like the heart, liver, and brain (e.g., Mitochondrial diseases, GSD). Deep Dive into Specific Conditions: Phenylketonuria (PKU): Phenylalanine accumulation, "musty odor" urine, and dietary management. Maple Syrup Urine Disease (MSUD): Branched-chain amino acid issues and characteristic sweet-smelling urine. Urea Cycle Defects (OCT Deficiency): The unique X-linked inheritance pattern and the danger of Hyperammonemia causing brain swelling. Storage Diseases: MPS Type 1 (Hurler Syndrome): Coarse facial features and organomegaly. Gaucher Disease: Lipid accumulation and its impact on the spleen and bone marrow. Glycogen Storage Diseases (GSD): Type 1 (Von Gierke): Liver involvement and hypoglycemia management. Type 2 (Pompe): Muscle weakness and Cardiomyopathy. Type 5 (McArdle): Muscle cramps and "dark brown" urine (Myoglobinuria) during exercise. Diagnosis and Management: Newborn Screening: The role of Tandem Mass Spectrometry in early detection. Treatment Strategies: Dietary restriction, product replacement, Enzyme Replacement Therapy (ERT), and organ transplantation. This guide is designed to help medical students and clinicians master the diagnostic approach to metabolic emergencies and long-term genetic management. 📌 NinjaBoss: Medical Genetic Playlist    • NinjaBoss: Medical Genetic   Timestamps: 0:00 Intro and Mechanism of IMD 1:25 Classification: Small, Large, and Energy Disorders 3:48 Phenylketonuria (PKU) 5:29 Maple Syrup Urine Disease (MSUD) 6:19 Urea Cycle Defects and OCT Deficiency 8:25 Hyperammonemia and Brain Swelling 9:40 Mucopolysaccharidosis (MPS) and Hurler Syndrome 10:23 Gaucher Disease and Lipid Storage 11:15 Glycogen Storage Disease (GSD) Overview 11:37 GSD Type 1 (Von Gierke) 12:37 GSD Type 2 (Pompe) 13:35 GSD Type 5 (McArdle) 14:26 Newborn Screening (Tandem MS) 14:55 Summary of Treatment Strategies 16:02 Outro If you found this video helpful, please Like, Subscribe, and hit the Notification Bell to follow the NinjaBoss Medical series! 👇    / @ninjaboss_th   #MedicalGenetics #MetabolicDisorders #InbornErrorsOfMetabolism #PKU #UreaCycle #GSD #USMLE #MedicalEducation #NinjaBoss