Introduction to Biotechnology Dr.Mohammed Al-Askeri University of Al-Qadisiyha College of Biotechnology Medical Biotechnology Dep.

introduction to Biotechnology

Dr.Mohammed Al-Askeri

University of Al-QadisiyhaCollege of BiotechnologyMedical Biotechnology Dep.

1. What is Biotechnology? • Definitions of Biotechnology • Timeline of Biotechnology • Techniques used in Biotechnology • Who's Who in Biotechnology

2. How is Biotechnology being used? • Applications of Biotechnology • Medicines on the market today • Agriculture - GM Foods and Animals • DNA fingerprinting and forensic science• Gene Therapy and Transgenic Animals • Human Embryonic Stem Cells and Cloning

Biotechnology

What is biotechnology? • Biotechnology = bios (life) + logos (study of or

essence)– Literally ‘the study of tools from living things’

• CLASSIC: The word "biotechnology" was first used in 1917 to describe processes using living organisms to make a product or run a process, such as industrial fermentations.

• LAYMAN: Biotechnology began when humans began to plant their own crops, domesticate animals, ferment juice into wine, make cheese, and leaven bread

• GENENTECH: Biotechnology is the process of harnessing 'nature's own' biochemical tools to make possible new products and processes and provide solutions to society's ills (G. Kirk Raab, Former President and CEO of Genentech)

• WEBSTER’S: The aspect of technology concerned with the application of living organisms to meet the needs and ends of man.

• WALL STREET: Biotechnology is the application of genetic engineering and DNA technology to produce therapeutic and medical diagnostic products and processes. Biotech companies have one thing in common - the use of genetic engineering and manipulation of organisms at a molecular level.

• Using scientific methods with organisms to produce new products or new forms of organisms

• Any technique that uses living organisms or substances from those organisms or substances from those organisms to make or modify a product, to improve plants or animals, or to develop microorganisms for specific uses

• Biotechnology is a multidisciplinarian in nature, involving input from

• Engineering• Computer Science• Cell and Molecular Biology• Microbiology• Genetics• Physiology• Biochemistry• Immunology• Virology• Recombinant DNA Technology Genetic manipulation

of bacteria, viruses, fungi, plants and animals, often for the development of specific products

What are the stages of biotechnology?

• Ancient Biotechnology• early history as related to food and shelter,

including domestication

• Classical Biotechnology• built on ancient biotechnology• fermentation promoted food production• medicine

• Modern Biotechnology• manipulates genetic information in organism• genetic engineering

Ancient biotechnology

• Paleolithic society – Hunter-gatherers Nomadic lifestyle due to migratory animals and edible plant distribution (wild wheat and barley) (~2 x 106 yrs.)

• Followed by domestication of plants and animals (artificial selection) People settled, sedentary lifestyles evolved (~10,000 yrs. ago)• Cultivation of wheat, barley and rye (seed

collections)• Sheep and goats milk, cheese, button and meat• Grinding stones for food preparation• New technology Origins of Biotechnology

Agrarian Societies

• History of domestication and agriculture History of domestication and agriculture History of domestication and agriculture

History of domestication and agriculture

• Long history of fermented foods since people began to settle (9000 BC) (fervere –to boil)

• Often discovered by accident!

• Improved flavor and texture

• Deliberate contamination with bacteria or fungi (molds)

• Examples:• Bread• Yogurt• Sour cream• Cheese• Wine• Beer• Sauerkraut

Fermented foods and beverages

• Dough not baked immediately would undergo spontaneous fermentation would rise Eureka!!

• Uncooked fermented dough could be used to ferment a new batch no longer reliant on “chance fermentation”

• 1866 – Louis Pasteur published his findings on the direct link between yeast and sugars CO2 + ethanol (anaerobic process)

• 1915 – Production of baker’s yeast – Saccharomyces cerevisiae

Fermented foods and beverages

• Different types of beer• Vinegar• Glycerol• Acetone• Butanol• Lactic acid• Citric acid• Antibiotics – WWII (Bioreactor developed for large

scale production, e.g. penicilin made by fermentation of penicillium)• Today many different antibiotics are produced by

microorganisms• Cephalosporins, bacitracin, neomycin,

tetracycline……..)

Classical biotechnology

Industry today exploits early discoveries of the fermentation process for production of huge numbers of products

• Substrate + Microbial Enzyme Product

• Examples:• Cholesterol Steroids (cortisone, estrogen,

progesterone) (hydroxylation reaction -OH group added to cholesterol ring)

Chemical transformations to produce therapeutic products

• Amino acids to improve food taste, quality or preservation

• Enzymes (cellulase, collagenase, diastase, glucose isomerase, invertase, lipase, pectinase, protease)

• Vitamins

• Pigments

Microbial synthesis of other commercially valuable products

• Cell biology• Structure, organization and reproduction

• Biochemistry• Synthesis of organic compounds• Cell extracts for fermentation (enzymes

versus whole cells)

• Genetics• Resurrection of Gregor Mendel’s findings 1866

1900s• Theory of Inheritance (ratios dependent on traits of

parents)• Theory of Transmission factors

• W.H. Sutton – 1902• Chromosomes = inheritance factors

• T.H. Morgan – Drosophila melanogaster

Modern biotechnology

Molecular Biology

• Beadle and Tatum (Neurospora crassa)• One gene, one enzyme hypothesis

• Charles Yanofsky colinearity between mutations in genes and amino

acid sequence (E. coli)• Genes determine structure of proteins

• Hershey and Chase – 1952 • T2 bacteriophage – 32P DNA, not 35S protein is

the material that encodes genetic information

• Watson, Crick, Franklin and Wilkins (1953)

• X-ray crystallography • 1962 – Nobel Prize awarded to three men• Chargaff – DNA base ratios• Structural model of DNA developed

• DNA Revolution – Promise and Controversy!!!

• Scientific foundation of modern biotechnology • based on knowledge of DNA, its replication, repair

and use of enzymes to carry out in vitro splicing DNA fragments

• Breaking the Genetic Code – Finding the Central Dogma

• An “RNA Club” organized by George Gamow (1954) assembled to determine the role of RNA in protein synthesis

• Vernon Ingram’s research on sickle cell anemia (1956) tied together inheritable diseases with protein structure• Link made between amino acids and DNA

• Radioactive tagging experiments demonstrate intermediate between DNA and protein = RNA• RNA movement tracked from nucleus to cytoplasm site of

protein synthesis

• DNA RNA Protein Transcription Translation

Genetic code determined for all 20 amino acids by Marshal Nirenberg and Heinrich Matthaei and Gobind Khorana – Nobel Prize – 1968

• 3 base sequence = codon

What are the areas of biotechnology?

• Organismic biotechnology• uses intact organisms and does not alter genetic

material

• Molecular Biotechnology• alters genetic makeup to achieve specific goals

Transgenic organism: an organism with artificially altered genetic material

• Medicine• human• veterinary• biopharming

• Environment• Agriculture• Food products• Industry and manufacturing

What are the applications of biotechnology?

• Production of new and improved crops/foods, industrial chemicals, pharmaceuticals and livestock

• Diagnostics for detecting genetic diseases• Gene therapy (e.g. ADA, CF)• Vaccine development (recombinant vaccines)• Environmental restoration• Protection of endangered species• Conservation biology• Bioremediation• Forensic applications• Food processing (cheese, beer)

Monoclonal Antibodies

Molecular Biology

CellCulture

Genetic Engineering

Anti-cancer drugs

DiagnosticsCulture of plants from single cells

Transfer of new genes into animal

organisms

Synthesis of specific DNA

probes

Localisation of genetic disorders

Tracers

Cloning

Gene therapy

Mass prodn. of human proteins

Resource bank for rare human chemicals

Synthesis of new proteins

New antibiotics

New types of plants and animals

New types of food

DNA technology

Crime solving

Banks of DNA, RNA and proteins

Complete map of the human genome

Biotechnology Timeline

1750 BC The Sumerians brew beer.

500 BC Chinese use moldy soybean curds as an antibiotic to treat boils

1590 Janssen invents the microscope

1675 Leeuwenhoek discovers cells (bacteria, red blood cells)

1830 Proteins are discovered

1833 The first enzymes are isolated

1855 The Eschirium coli bacterium is discovered

Biotechnology Timeline

1859 Charles Darwin publishes On the Origin of Species

1864 Louis Pasteur shows all living things are produced by other living things

1865 The age of genetics begins

1902 Walter Sutton coins the term ‘gene’ - proposed that

chromosomes carry genes

1910 Chromosomal theory of inheritance proved

1928 Fleming discovers antibiotic properties of certain molds

1941 George Beadle and Edward Tatum propose that one gene makes one protein

1949 Sickle cell anaemia demonstrated to be molecular disease

1952 The ‘Waring Blender’ experiment

1953 The double helix is unravelled

1967 The genetic code is cracked

1973 Recombinant DNA technology begins

1975 First international conference on recombinant DNA technology

1975 Monoclonal antibody technology introduced

1975 DNA sequencing discovered

1978 Genentech Inc. established

1978 Genentech use genetic engineering to produce human insulin in E.coli - 1980 IPO of $89

1978 Kary Mullis discovers PCR

1989 The Human Genome Project begins

1990 First use of gene therapy

1990 First product of recombinant DNA technology introduced into US food chain

1993 FDA announces that transgenic food is safe

1994 The FLAVRSAVR tomato - first genetically engineered whole food

1996 First mammal cloned from adult cells

1990s First conviction using genetic fingerprinting

1996 Development of AffymetrixGeneChip

1997 First artificial chromosome

1998 Human embryonic stem cells grown

1999 Celera announces completion of Drosophilia genome sequence

2000 90% of Human Genome sequence published on web

2001 Human genome project complete