Biochemistry

A.Y. 2022/2023
6
Max ECTS
74
Overall hours
SSD
BIO/10
Language
English
Learning objectives
Biochemistry is a medical oriented course devoted to understand the metabolic processes supporting life. The course addresses the structure, function and turnover of biomolecules. Lectures will be focused on cellular metabolism and energy relationships, as well as on the regulation, of, and interconnections among, metabolic pathways. The topics of the course will be presented in a conceptual and methodological framework largely shared by modern human biochemistry.
Expected learning outcomes
By the end of this course, students will be able to:
- describe the metabolic processes supporting human life;
- demonstrate a mastery of core concepts and principles in human and medical biochemistry;
- demonstrate critical thinking skills, such as the ability to solve problems related to medical issues;
- integrate knowledge and explain how metabolic dysfunctions may lead to diseases.
Single course

This course cannot be attended as a single course. Please check our list of single courses to find the ones available for enrolment.

Course syllabus and organization

Single session

Responsible
Course syllabus
CELLULAR MEMBRANES
- structure, organization, and functional properties
- roles of the specific lipid, protein and carbohydrate components
- lateral and trans-bilayer motions of lipids
- microdomains as functional compartments

TRANSPORT ACROSS MEMBRANES
- mechanisms, roles, and control of diffusion and solute transport in homeostasis
- features and types of protein-mediated transport
- pores, channels and ionophores
- passive transmembrane transporters of ions
- primary active transporters: ATP-dependent pumps and ATP-binding cassette transporters
- the solute carrier transporter family: transport of glucose, amino acids, vitamins and ions
- overview of vesicular transport

BIOCHEMISTRY OF HORMONES
- chemical structure and properties of hormonal classes
- hormone biosynthesis and release
- hormonal control and cyclic hormonal systems
- hormone receptors and properties
- action mechanism of lipophilic and hydrophilic hormones

ENZYMES
- definition, structure and properties, mechanisms and kinetics, nomenclature
- factors affecting enzyme activity, enzyme cofactors, coenzymes and isoenzymes
- enzyme inhibition and regulatory mechanisms of enzyme activity
- pseudoenzymes and moonlighting enzymes and medical relevance of enzymes

CELLULAR METABOLISM
- definition, purposes, and features
- metabolic pathways: types, interconnections and control strategies
- metabolomics and relevance in medicine
- metabolism and epigenetics

CELLULAR STRATEGIES FOR ENERGY TRANSFER AND USE
- high-energy compounds
- properties and role of ATP as energy transporter
- biological oxidations: coenzymes and role in homeostasis
- energy flux and energy transformation in cells
- ATP formation by substrate-level phosphorylation and oxidative phosphorylation

FUNDAMENTALS OF HUMAN NUTRITION
- functional types of nutrients
- essential nutrients and their importance in human health
- nutrient energy content: evaluation and measure units
- basal metabolic rate and factors influencing it
- total energetic requirement, its components and energetic needs for physical activity

THE TRICARBOXYLIC ACID CYCLE
- substrates, products, enzymes, cofactors, sites of energy recovery, and regulation
- the amphibolic role of the TCA cycle and roles of anaplerotic reactions
- the signaling role of the TCA cycle

THE MITOCHONDIAL RESPIRATORY CHAIN
- components, organization, properties, and energy flow
- the process of mitochondrial electron transfer
- inhibitors of the mitochondrial respiratory chain and role for altered mitochondrial respiratory chain in human diseases

ATP SYNTHASE
- structure and functional components
- coupling between the respiratory chain and ATP formation
- mechanism of oxidative phosphorylation
- the ATP/ADP cycle, and the concept of respiratory control
- inhibitors and uncouplers of oxidative phosphorylation
- different roles of oxygen in human cells

REACTIVE OXYGEN SPECIES
- definition and types, production and clearance
- effects in physiological and physio-pathological conditions
- nitric oxide metabolism, functions and toxicity
- antioxidant defenses and redox homeostasis


METABOLISM OF CARBOHYDRATES
- digestion and absorption of carbohydrates
- glucose phosphorylation, importance in metabolism, and medical application
- metabolic fates of glucose
- the glycolytic pathway and energy production from anaerobic and aerobic glycolysis
- regulation of glycolysis by local and hormonal control
- shuttle mechanisms for transfer of reducing equivalents from cytosol to mitochondria
- role of glycolytic intermediates as precursors for biosynthesis
- origins and metabolic fates of fructose and galactose in humans
- the polyol pathway
- the pentose phosphate pathway and role in different cells
- glutathione metabolism and functions
- glycogen: advantages as energy storage, metabolism and regulation, medical importance of glycogen storage diseases

GLYCOCONJUGATES
- structure and functions
- types, origins, and activation of the monosaccharide units
- metabolism of O- glycoproteins and N-glycoproteins
- metabolism of glycosphingolipids

METABOLISM OF LIPIDS
- dietary lipids and fatty acids found in foods
- structure and role of essential fatty acids
- emulsification, enzymatic digestion and absorption of dietary lipids
- inter-organ transport of different lipids in blood: lipoprotein classification, composition, metabolism and roles
- fatty acid activation and metabolic fates
- fatty acid catabolism: β-oxidation (mechanism and regulation), peroxisomal and -oxidation oxidation
- ketone bodies: structure, metabolism, and metabolic relevance
- fatty acid biosynthesis: mechanism, and regulation
- fatty acid chain elongation and desaturation
- structure, metabolism, and properties of triacylglycerides, glycerophospholipids, eicosanoids, and endocannabinoids
- cholesterol structure, functions, origins, esterification, transport in blood and into cells

METABOLISM OF AMINO ACIDS
- digestion of dietary proteins and intestinal amino acid absorption
- protein turnover and mechanism of protein catabolism; proteosomal proteolysis
- transamination of amino acids: mechanism, roles and importance of aminotransferases in medicine
- biosynthesis of amino acids: precursors, cofactors, and metabolic strategies
- amino acid catabolism: fates of the carbon skeleton and the amino group
- ammonia: formation, blood transport, and strategies for elimination;
- urea cycle and its regulation

METABOLISM OF NUCLEOTIDES
- functional properties of nucleotides
- de novo synthesis and recycling pathways
- catabolism, and medical significance of uric acid

VITAMINS IN HEALTH AND DISEASE
- sources, biochemical properties and health benefits of hydrophilic and hydrophobic vitamins
- consequences of vitamin deficiencies and excesses

METABOLIC INTERRELATIONSHIPS
- circulating and tissue stores of energy
- blood glucose regulation: endocrine control and relevance
- metabolic adaptations in the fed and fasting state and in stress conditions
Prerequisites for admission
To follow the Biochemistry course, students should have already acquired the following issues, provided in the FBS and CMG1 courses:
i. thermodynamics principles and laws;
ii. characteristics of chemical reactions: kinetics, equilibrium and energy
iii. biological oxidation, redox reactions and electrochemistry
iv. structure and chemical properties of carbohydrates, lipids, nucleotides, nucleic acids, amino acids, and proteins;
v. synthesis of nucleic acids and of proteins;
vi. cell structure, organization, and compartmentalization;
vii. mechanisms of signal transduction.
Teaching methods
Synchronous learning: lectures, problem-based learning, and case studies.
Teaching Resources
· Devlin T.M. Textbook of biochemistry with clinical correlations. 7th ed. revised, 2019.
· Lieberman M. and Marks A. "Marks' basic medical biochemistry: a clinical approach" 5th ed. Lippincott Williams & Wilkins, 2018.
· Baynes J., Dominiczak M.H. Medical biochemistry. 5th edn, 2018, Elsevier
On specific topics of the program, additional material will be available during the course.
Assessment methods and Criteria
To take the Biochemistry exam, students must have already taken the FBS and CMG1 exams.
Students' evaluation will be assessed through a written and an oral examination.
Students must take the written and the oral exam in the same section.
The written test will be composed of 30 multiple choice questions. Each correct answer will value 1 point. The written test has a threshold of 18/30, and will not contribute to the final mark.
Only students who pass the written test will be allowed to take the oral examination.
The written and oral examinations will deal with all the topics covered in class, and detailed in the course syllabus.
The exam calendar will be scheduled starting from June 2023, and will include 3 sessions in June-July 2023, 2 sessions in September 2023, and 2 sessions in January-February 2024.

Registration to exams through the SIFA system is mandatory.
Attendance is required to take the exam. Unexcused absence is tolerated up to 34% of the course activities. University policy regarding excused illness is followed.
BIO/10 - BIOCHEMISTRY - University credits: 6
Practicals: 8 hours
Lessons: 66 hours
Professors: Aureli Massimo, Riboni Laura Piera Carla Giulia
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