pathology: a. the study of disease b. a clinical specialty
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Pathology: a. The Study of Disease b. A Clinical Specialty. Why the teaching of concepts and mechanisms of disease is important at the high school level. The basic principles of general pathology. - PowerPoint PPT PresentationTRANSCRIPT
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Pathology:a. The Study of Diseaseb. A Clinical Specialty
Why the teaching of concepts and mechanisms of disease is important at the high school level.
The basic principles of general pathology.
Application of the principles and methods of pathology to the diagnosis, as well as the understanding of disease.
The potential career pathways for pathologists.
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Biology Pathology
• Health Disease• Order Disorder• Symbiosis Parasitism• Homeostasis Host Defense• Growth Neoplasia• Circulation Infarction• Hormones Endocrine Diseases
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• Confront disease in their daily lives• Inundated by disease (mis)information (news, entertainment)• New threats to be faced (emerging pathogens, bioterrorism)• Increasing complexity of medical care (informed consumers)
WHY INCLUDE DISEASE PRINCIPLES IN HIGH SCHOOL CURRICULUM?
A. IT’S IMPORTANT
B. IT’S INTERESTING• Focus on themselves & their bodies (as well as frogs and paramecia)
Integration of both sides of the forceC. IT’S REINFORCING
• Observation & Classification• Conceptualization & Abstraction,• Explanation & Prediction• Application• (Career choices)
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GENERAL PATHOLOGY There are general principles that apply to
the various diseases
• Finite set of patterns of injury • Similar physiologic and morphologic
consequences of different injuries • Small number of reparative processes
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HOST DEFENSE
Injury
Protective Response
RepairInflammation
ImmunityFibrosisRegenerationResolution
mediators
Inflammation is an immediate reaction to damage that limits it directly, helps focus an immunereaction, and sets the stage for subsequent repair.
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INFLAMMATION & IMMUNITY
INFLAMMATION vessels serum factors cells
IMMUNE RESPONSE antibodies activated cells cytokines
Inflammatory/Immune Cells
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Cell-MediatedCell-MediatedCell-MediatedCell-Mediated
Antibody-MediatedAntibody-MediatedAntibody-MediatedAntibody-Mediated
EFFECTOR FUNCTIONS OF THE IMMUNE SYSTEM
Cytokine-Mediated
•Cell destruction•Cell proliferation•Cell movement•Cell differentiation•Cell activation
•Precipitation•Neutralization•Complement activation•Mask Receptors•Enhance Phagocytosis•Activate leukocytes•ADCC
Cytotoxic T cellsActivated NK CellsActivated Macrophages
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LYMPHOCYTES LEAVING A BLOOD VESSEL
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CANCER
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POSITION TITLE: MALIGNANT CELLJob Description
• Survive and proliferate locally• Invade adjacent tissue• Induce supporting stroma and blood supply• Gain access to the circulation
a. Cross basement membraneb. Cross endothelium
• Leave circulationa. Cross endotheliumb. Cross basement membrane
• Colonize new location• Survive and proliferate at distant site
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GROSS PHOTOGRAPH MICROPHOTOGRAPH
CANCER OF PANCREAS
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THE KISS OF DEATH
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CAUSES OF CANCER
SOME SPECIFIC CAUSES
•Sweeping chimneys•Using aniline dyes•Smoking cigarettes•Building ships in WWII•Renovating old houses
SOME GENERAL CAUSES
•Breathing•Drinking•Eating•Working•Sunshine•Sex•Doctors
SOME UNDERLYING CAUSES
•Loss of negative growth signals•Excessive production of growth factors•Decreased (normal) cell death•Loss of spatial constraints
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Patient
Physical Exam
RadiologistSurgeon
Pathologist
Internist
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Normal Breast
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MAMMOGRAM
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BREAST CANCER
DIAGNOSTIC SURGICAL PROCEDURES
• Fine Needle Aspiration (FNA)
• Needle Core Biopsy
• Excision Biopsy
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CANCER CELLS BY CYTOLOGY
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TISSUE EXAMINATION
PROCESSING
SLIDE PREPARATION
FINAL DIAGNOSISS-01-10
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BREAST CARCINOMA- THROUGH MICROSCOPE
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DETECTION & IDENTIFICATION METHODS
ANTIBODIES AS DETECTION AGENTS
• Immunohistochemistry
• Immunofluorescence
DNA AS PROBES
• In situ hybridization
• DNA sequencing
• Polymerase Chain Reaction
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Amplification of signal with biotin
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IMMUNOHISTOCHEMISTRY
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FLUORESCENT IN SITU HYBRIDIZATION (FISH)
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MOLECULAR IDENTIFICATION
•Cellular phenotypes•Differentiation stages•Tumor classification•Gene activation & RNA expression•Detection of proteins, nucleotide sequences, mutations•Exogenous pathogens•Altered proteins
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APPENDIX: INTEGRATION OF PATHOLOGY AND BIOLOGY CURRICULUM
UNIT 1: WHAT IS BIOLOGY?Module 1: Basic Aspects of Pathology
•The relationship between homeostasis and response to damage•Self-protection: inflammation, immunity, & repair•How organisms adapt to functional losses•How we study disease, and what tools are available•The use of biological principles to treat disease
UNIT 2: PRINCIPLES OF ECOLOGYModule 2: The Ecology of Disease
•Distinguishing self from non-self•How populations resist injury by adaptation•How populations resist injury by evolution•Infectious diseases as predators•How do humans experience symbiosis and parasitism
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INTEGRATION OF PATHOLOGY & BIOLOGY CURRICULUM
UNIT 3: THE LIFE OF CELLSModule 3: Cellular Pathology
•How does the cell maintain a boundary around it, other cells & the outside world?
•What happens when these boundaries are breached?•Susceptibility of organelles to damage & disturbances of cellular metabolism•What triggers a cell to divide and how can this stimulus become defective?•What are the consequences of uncontrolled cell proliferation?•How we study disease, and what tools are available?•The use of biological principles to treat disease
UNIT 4: GENETICSModule 4: The Genetics of Disease
•How can diseases be inherited?•Does heredity play a role in diseases that are not inherited?•Do different populations have different risk factors?•The difference between germ cell and somatic cell mutation•What are the principles of genetic engineering?
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INTEGRATION OF PATHOLOGY & BIOLOGY CURRICULUM
UNIT 5: EVOLUTIONModule : Evolutionary Forces in Disease
•The forces driving molecular evolution in animals & pathogens•Information transfer without DNA (prions & retroviruses)•Do disease organisms co-evolve with their hosts and/or evolve
to take advantage of new hosts•What are the differences between evolution & genetic engineering?
UNIT 6: DIVERSITY OF LIFEModule 6: diversity of Disease
•What are the different kinds of pathogenic agents (pathogens)?•How do we classify infectious organisms?•Differences in the response to different kinds of pathogens•How do different individuals respond differently to
the same or similar pathogens?