Introduction To Toxicology Flashcards
Deals with the undesirable effects of chemicals on living systems, from individual cells to complex ecosystems.
TOXICOLOGY
Study of adverse effects of the xenobiotics
TOXICOLOGY
It is the study of the adverse effects of chemical, physical, or biological agents on people, animals, and the environment.
TOXICOLOGY
Ex. Physical poison
Nuclear rays & radiation
Ex. Chemical poison
Reagents and chemicals
Ex. Biological poison
Toxins
What killed Socrates?
Hemlock
What killed Cleopatra?
Asp (snake)
state poison of the Greeks
hemlock
chinese arrow poison
aconite
How opium is used?
antidote-poison-antidote
Heavy metals examples
Pb, Hg, Cu, As, Sb
treatise on the treatment of poisonings from insects, snakes, and mad dogs
Poisons and Antidotes (1198)
Wrote on the subject of bioavailability, noting that milk, butter, and cream could delay intestinal absorption
Maimonides
Paracelsus name
Philippus Aureolus Theophrastus
Bombastus von Hohenheim
coined the word “toxixon”
Paracelsus
Father of Toxicology
Paracelsus
Considered to be the modern father of toxicology.
Mathieu Orfila (Mattieu Joseph Bonaventura Orfila)
Book written by Orfila
traite des poisons
toxicology came from the Greek word
toxicon
What killed Alexander the Great?
alcohol overdose
Hemlock
Conium maculatum
Aconite
Aconitum napellus
Opium
Papaver somniferum
Farmer God
Shen Nong
Founded the Chinese Herbal Medicine
Shen Nong
Founder of Ayurveda (India)
Sushruta
Developed tolerance to poisons
Mithridates VI
Nicander of Colophon authored 2 books entitled:
Theriaka & Alexipharmaka
How many substances does the book Alexipharmaka have?
exactly 21 substances
Wrote the encyclopedic “De Materia Medica”
Dioscorides
Authored the book “A Mechanical Account of Poisons in Several Essays”
Richard Mead
Authored the book “De Morbis Artificum Diatriba” (A Treatise on the Diseases of Workers)
Bernardino Ramazzini
Richard Mead book
A Mechanical Account of
Poisons in Several Essays
Bernardino Ramazzini
De Morbis Artificum Diatriba (A Treatise on the Diseases of Workers)
Authored the essay “Chirurgical Observations Relative to the Cataract, the Polypus of the Nose, the Cancer of the Scrotum “
Percivall Pott
Said that there is a connection between the job of chimney sweepers to the scrotum cancer.
Percivall Pott
His work led to the understanding of homeostasis.
Claude Bernard
Studied the toxicological effects of opium, atropine, strychnine, and nicotine.
Claude Bernard
Toxic substance in Castor beans
Ricin
Castor beans
Ricinus communis
Ricin MOT
inhibits protein production
Nux vomica seed toxin
Strychnine
Strychnine
Strychnos nux-vomica
Strychnine MOT
inhibits glycine leading to seizure
Mushroom (Amanita muscaria)
Muscarine
Muscarine MOT
muscarinic/cholinergic effects (DUMBELSS)
Pb toxicity
Plumbism
Plumbism antidote
EDTA
Ag toxicity
Argyria
Argyria antidote
NaCl in the form of NSS
Pb toxicity half-life
2 months
Ag toxicity half-life
52 days
This provides necessary information for safety evaluation and regulatory requirements.
Descriptive Toxicology
concerned with elucidating the mechanisms by which chemicals exert their toxic effects on living organisms
Mechanistic Toxicology
It aims to identify the molecular events that leads to the manifestation of toxic effects
Mechanistic Toxicology
basis of data provided by the descriptive toxicologist if a drug or other chemical possesses a sufficiently low risk to be marketed for a stated purpose
Regulatory Toxicology
3 Main Areas in Toxicology
Descriptive, Mechanistic, Regulatory (DMR)
hybrid of analytic chemistry and fundamental toxicological principles
Forensic Toxicology
It is concerned with the medico-legal aspects of the harmful effects of chemicals on humans.
Forensic Toxicology
Examples of Regulatory Toxicology
FDA, DOH, WHO, ICH
Deals within the realm of medical science concerned with disease caused by, or uniquely associated with toxic substances.
Clinical Toxicology
Clinical toxicologists develop antidotes and treatment regimens for ameliorating poisoning and xenobiotic injury
Clinical Toxicology
Most clinical toxicologists work in hospitals and have close links with university clinical pharmacology departments
Clinical Toxicology
focuses on the impacts of chemical pollutants found in the environment on biological organisms
Environmental Toxicology
Studies chemicals that are contaminants of food, water, soil or the air
Environmental Toxicology
Study the effect of xenobiotics in the environment, which may include the animals
Environmental Toxicology
Deals with the chemicals found in the workplace.
Occupational Toxicology
Study of adverse effects that is due to chemicals encountered at work.
Occupational Toxicology
The major emphasis of _______________ is to identify the agents of concern, define the conditions leading to their safe use, and prevent absorption of harmful amounts.
Occupational Toxicology