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Diseases and Drugs: Cholera, Pertussis, and CAMP Effects

๐Ÿ“‘ 5 slides ๐Ÿ‘ 9 views ๐Ÿ“… 4/26/2026
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Introduction to Toxins and cAMP

Cholera toxin increases cAMP, causing severe diarrhea by activating CFTR channels

Introduction to Toxins and cAMP
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Cholera Toxin Mechanism

  • Cholera toxin binds to GM1 ganglioside on intestinal cells
  • It permanently activates Gs proteins, increasing cAMP levels
  • High cAMP causes chloride and water secretion into intestines
  • Leads to severe dehydration and electrolyte imbalance
Cholera Toxin Mechanism
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Pertussis Toxin Effects

  • Pertussis toxin ADP-ribosylates Gi proteins, inhibiting their function
  • Results in uncontrolled cAMP production in respiratory cells
  • Causes whooping cough symptoms: paroxysmal coughing, vomiting
  • Vaccination is key prevention against pertussis infection
Pertussis Toxin Effects
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Drugs Targeting cAMP Pathways

  • แบž-blockers reduce cAMP in heart cells, lowering blood pressure
  • PDE inhibitors like sildenafil increase cGMP, affecting cAMP levels
  • Milrinone inhibits PDE3, increasing cAMP for heart contraction
  • These drugs treat hypertension, erectile dysfunction, heart failure
Drugs Targeting cAMP Pathways
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Conclusion and Summary

  • Cholera and pertussis toxins disrupt cAMP with severe effects
  • Drugs modulating cAMP pathways treat multiple conditions
  • cAMP dysregulation is implicated in cancer and diabetes
  • Understanding these mechanisms aids in developing new therapies
Conclusion and Summary
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