Monique Shared "1st Aid - Biochemistry" - 98 Picmonics

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1st Aid - Biochemistry

Leflunomide
Mechanism
Reversibly inhibits dihydroorotate dehydrogenase, preventing pyrimidine synthesis.
Suppresses T-cell proliferation.
CLINICAL USE
Rheumatoid arthritis
Psoriatic Arthritis
ADVERSE EFFECTS
Diarrhea
Hypertension
Hepatotoxicity
Teratogenicity
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Methotrexate
Indications
Rheumatoid Arthritis
Cancer
Medical Abortion
Mechanism
Folic Acid Analog
Inhibits Dihydrofolate Reductase
Side Effects
Pulmonary Fibrosis
Myelosuppression is Treated with Leucovorin Rescue (Folinic Acid)
Macrocytic Anemia
Hepatitis
Teratogenic
Mucositis
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1 min
Trimethoprim
Mechanism of Action
Bacteriostatic
Inhibits Bacterial Dihydrofolate Reductase
Causes Sequential Block of Folate Synthesis
Used in Combination with Sulfamethoxazole
Combination Used For Recurrent Urinary Tract Infections
Indications
Shigella
Salmonella
Pneumocystis Jiroveci Pneumonia
Side Effects
Decrease in Red and White Blood Cells
Alleviated with Leucovorin Rescue
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2 mins
Fluorouracil (5-FU)
Mechanism
Antimetabolite
"Thymine-less Death"
Indications
Slow-growing Solid Tumors
Co-administered with Leucovorin for Stomach Cancer
Basal Cell Carcinoma (Topical)
Side Effects
Myelosuppression
Mucositis
Severe Diarrhea
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3 mins
Azathioprine (Imuran)
Mechanism
Antimetabolite
Prodrug of 6-mercaptopurine (6-MP)
Inhibits Synthesis of Nucleic Acids
Indications
Autoimmune Disorders
Kidney Transplantation
Side Effects
Myelosuppression
Increased Toxicity with Allopurinol Use
Pancreatitis
Malignancy
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3 mins
Mycophenolate Mofetil
mechanisms
Reversible inhibitor of IMP dehydrogenase
Inhibits De Novo Purine Synthesis Pathway
Deprives T and B Cells of Guanine Nucleotides
indications
Dermatitis
Connective Tissue Diseases
Vasculitis
Transplant Rejection
adverse effects
GI distress
Pancytopenia
Hypertension
Hyperglycemia
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Ribavirin
Mechanism
Hypermutation in RNA Viruses
Inhibits Inosine Monophosphate Dehydrogenase
Indications
Hepatitis C
Viral Hemorrhagic Fevers
Respiratory Syncytial Virus (RSV)
Side Effects
Hemolytic Anemia
Teratogen
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1 min
Hydroxyurea
Mechanism
Inhibits Ribonucleotide Reductase
Decreased DNA Synthesis
S-phase Specific
Indications
Melanoma
Chronic Myelogenous Leukemia (CML)
Sickle Cell Disease
Through Increased HbF (Fetal Hemoglobin)
Side Effects
Myelosuppression
GI Distress
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2 mins
Adenosine Deaminase Deficiency
Adenosine to Inosine
Excess ATP
Inhibition of Ribonucleotide Reductase
Prevents DNA Synthesis
Decreases B Cells and T Cells
Major cause of SCID
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1 min
Lesch-Nyhan Syndrome
X-linked Recessive
Absence of HGPRT
Hypoxanthine to IMP
Guanine to GMP
Excess uric acid
Gout
Retardation
Self-mutilation
Choreoathetosis
PRPP is increased
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2 mins
Camptothecins
Topotecan
Irinotecan
Indications
Solid tumors
MOA
Inhibit Topoisomerase I
Toxicities
Diarrhea
Myelosuppression
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Etoposide
Indications
Small Cell Lung Cancer
Testicular Cancer
Mechanism of Action
Inhibits Topoisomerase II
Errors in DNA Synthesis Cause Apoptosis
Side Effects
Myelosuppression
Alopecia
Hypotension
Nausea and Vomiting
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2 mins
Fluoroquinolones Antibiotics
-floxacin
Mechanism of Action
Inhibits Topoisomerase II & IV
Bactericidal
Indications
Gram-negative Rods
Pneumonia
Gastrointestinal Infections
Urinary Tract Infection
Genital Infections
Drugs
Levofloxacin
Ciprofloxacin
Has Pseudomonas Coverage
Considerations
Avoid Polyvalent Cations
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3 mins
Fluoroquinolones Toxicities
Diarrhea
Skin Rash
Headache
Tendon Rupture in Adults
Myalgias in Kids
Damage to Cartilage
Teratogen
QT Prolongation
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1 min
Xeroderma Pigmentosum
Pathophysiology
Defective Nucleotide Excision Repair
Complications
Extreme Light Sensitivity
Dark Freckles on Skin
Pale, Dry Skin
Susceptible to UV Rays A and B
Corneal Ulcers
Increased Risk of Skin Cancer
Some Patients Present Progressive Neurodegeneration
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2 mins
Lynch Syndrome (Hereditary Nonpolyposis Colorectal Cancer)
Characteristics
Autosomal Dominant
Defective DNA Mismatch Repair
80% Risk of Colon Cancer Development
Proximal (Right) Colon
Type II associated with Endometrial, Ovarian and Skin Cancers
3-2-1 Rule
3 Relatives with Colon Cancer
Occurs Across 2 Generations
1 Relative Diagnosed < 50 Years Old
Treatment
Frequent Screening
Colectomy
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3 mins
Ataxia Telangiectasia
Pathophysiology
Autosomal Recessive
ATM Gene
Defect in DNA repair
Signs & Symptoms
Cerebellar defects
Spider Angiomas
Sensitive to Radiation
Defective Tumor Suppressor Gene
Increased risk of Cancer, Leukemias, and Lymphomas
Increased AFP levels
IgA deficiency
Repeated sinopulmonary infections
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2 mins
Fanconi Anemia
Most common form of inherited aplastic anemia
Caused by inherited defects in non-homologous end-joining
Signs and Symptoms
Hypopigmented Areas of Skin
Cafe au lait spots
Microcephaly
Thumb abnormalities
Elevated serum AFP in 50% of cases
Increased HbF (Fetal Hemoglobin)
Diagnosis
Culturing lymphocytes and observing extensive chromosomal breakage in the presence of DNA cross-linking agents
Risk of developing
Acute myelogenous leukemia (AML)
Myelodysplastic syndrome
Squamous cell carcinoma of head, neck, or vulva
Treatment
Treatment
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Dactinomycin (Actinomycin D)
Indications
Wilms' Tumor
Rhabdomyosarcoma
Ewing's Sarcoma
Gestational Trophoblastic Malignancy
Mechanism
Intercalates DNA
Side Effect
Myelosuppression
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2 mins
Rifampin
Tuberculosis (TB)
Blocks RNA Polymerization
Haemophilus influenzae Type B
Leprosy
Meningitis
P450 inducer
Red-orange urine
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55 secs

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