Study sheet: Biochemistry and Medicine Foundations

📋 Course Outline

1. Biochemistry and Its Medical Scope
2. Yeast Fermentation and Biochemistry
3. Methods That Advanced Biochemistry
4. Bidirectional Links with Medicine
5. Biochemistry of Health and Disease
6. Human Genome Project Impact
7. Postgenomic Research Fields
8. Biomedical Databases and Resources

📖 1. Biochemistry and Its Medical Scope

🔑 Key Concepts & Definitions

• Biochemistry : the science of molecules in living organisms, individual chemical reactions and their enzyme catalysts, and the expression and regulation of metabolic processes

★ Must-know

📌 Biochemistry and medicine have a mutually cooperative relationship: biochemical studies illuminate health and disease, while studying health and disease opens new areas of biochemistry.

Further detail

• Biochemistry contributes to:
  • cell biology
  • physiology
  • immunology
  • microbiology
  • pharmacology
  • toxicology
  • epidemiology
  • inflammation
  • cell injury
  • cancer research

💡 Memory Hook

Biochemical reactions → health, disease, and medical practice

📖 2. Yeast Fermentation and Biochemistry

★ Must-know

• In 1899, the brothers Büchner demonstrated that yeast fermentation could occur without intact cells by storing a yeast extract in concentrated sugar solution.

• The research identified: inorganic phosphate, ADP, ATP, NAD(H), phosphorylated sugars, reactions and enzymes converting glucose to pyruvate, reactions and enzymes converting glucose to ethanol and CO2

Further detail

• The vitamin-derived coenzymes included:
  • thiamin pyrophosphate
  • riboflavin
  • coenzyme A
  • coenzyme Q
  • cobamide coenzyme

💡 Memory Hook

Pasteur: intact cells; Büchner: cell-free extract

📖 3. Methods That Advanced Biochemistry

★ Must-know

• Investigators used:

  • animal models
  • perfused intact organs
  • tissue slices
  • cell homogenates and subfractions
  • purified enzymes

• Analytical ultracentrifugation, chromatography, and radioisotopes such as 14C, 3H, and 32P enabled analysis and tracing of intermediates in complex pathways.

Further detail

• X-ray crystallography was used to determine three-dimensional structures of proteins, polynucleotides, enzymes, and viruses.

💡 Memory Hook

Models → separation → tracers → structures → genetics

📖 4. Bidirectional Links with Medicine

★ Must-know

• Analysis of hemoglobin revealed a single amino acid sequence difference between normal hemoglobin and sickle cell hemoglobin, clarifying relationships between protein structure and function.

• Garrod studied (Archibald Garrod, early 1900s):

  • alkaptonuria
  • albinism
  • cystinuria
  • pentosuria

Further detail

• Studies of familial hypercholesterolemia clarified disease-causing mutations and mechanisms of cell receptors and molecular uptake, including cholesterol uptake.

💡 Memory Hook

Biochemistry explains disease, while disease reveals biochemistry

📖 5. Biochemistry of Health and Disease

🔑 Key Concepts & Definitions

• Health : World Health Organization — complete physical, mental, and social well-being rather than merely the absence of disease and infirmity

★ Must-know

• Optimal dietary intake includes:

  • vitamins
  • certain amino acids
  • certain fatty acids
  • various minerals
  • water

• Many diseases result from abnormalities in genes, proteins, chemical reactions, or biochemical processes that adversely affect critical biochemical functions.

Further detail

• Biochemical disturbances include:
  • electrolyte imbalance
  • defective nutrient ingestion or absorption
  • hormonal imbalances
  • toxic chemicals or biologic agents
  • DNA-based genetic disorders

💡 Memory Hook

Biochemical imbalance → impaired function → disease

📖 6. Human Genome Project Impact

★ Must-know

• The entire human genome sequence was completed in 2003, except for a few gaps, about 50 years after Watson and Crick described DNA's double-helical nature.

• Sequencing genes and using gene knockout experiments revealed previously unknown genes and products, provided insights into human evolution, and helped identify disease-related genes.

Further detail

• The model organisms include:
  • yeast
  • Drosophila melanogaster
  • Caenorhabditis elegans
  • zebrafish

💡 Memory Hook

Sequencing → gene analysis → model organisms → disease insight

📖 7. Postgenomic Research Fields

🔑 Key Concepts & Definitions

• Genomics : the in-depth study of the structures and functions of an organism's complete set of genes, its genome
• Pharmacogenomics : uses genomic information and technologies to optimize discovery and development of new drugs and drug targets
• Bioinformatics : the collection, storage, and analysis of biological data such as DNA, RNA, and protein sequences
• Gene Therapy : uses genetically engineered genes to treat various diseases

📝 Essential Points

• Transcriptomics studies RNA transcripts, proteomics studies proteins, glycomics studies carbohydrates, lipidomics studies lipids, and metabolomics studies metabolites and their changes in metabolic states.

💡 Memory Hook

G-L-M-P-T: glycomics, lipidomics, metabolomics, proteomics, transcriptomics

📖 8. Biomedical Databases and Resources

🔑 Key Concepts & Definitions

• Molecular Diagnostics : uses molecular approaches such as DNA probes to assist diagnosis of biochemical, genetic, immunologic, microbiologic, and other medical conditions
• Nanotechnology : develops and applies medical devices such as nanoshells that are only a few nanometers in size, with 1 nm equal to 10−9 m
• Stem Cell Biology : Stem cells are undifferentiated cells capable of self-renewal and differentiation into any adult cell type, and stem cell biology studies their biology and therapeutic potential.
• Synthetic Biology : combines biomolecular techniques with engineering approaches to build new biological functions and systems

📝 Essential Points

• The biomedical databases include:
  • ENCODE
  • GenBank
  • HapMap
  • ISDB
  • PDB

📊 Synthesis Tables

Core Biochemical Research Fields

Field	Main subject	Primary use
Genomics	Complete set of genes	Study genome structure and function
Transcriptomics	RNA transcripts	Study gene expression products
Proteomics	Proteins	Study protein structures and functions
Metabolomics	Metabolites	Study metabolic states and changes