3/25 - UW 24 Flashcards
In what circumstances is 2,3-BPG production increased?
In hypoxic conditions, e.g. chronic lung disease, heart failure, and high altitudes
Reye syndrome hepatolopathy shows what on light microscopy?
Microvesicular steatosis, NOT necrosis or inflammation
What is the clinical presentation of Reye syndrome?
Vomiting and hepatomegaly, rarely see jaundice. Elevated ALT, AST, ammonia, bili, PT and PTT
What light microscopy findings will you see in viral hepatitis?
Hepatocyte apoptosis, acinar necrosis, periportal mononuclear inflammatory infiltration
Mitochondrial defects tend to cause what sequelae?
Lactic acidosis, and defects in tissues with high metabolic rates, e.g. neural and muscular tissue
HIV+ mothers should be prophylaxed with what?
Nucleoside analog, Zidovudine (retroviral reverse transcriptase inhibitor)
When should reverse transcriptase inhibitor (Zidovudine) prophylaxis be started in an HIV+ pregnant woman?
14 wks gestation, continued throughout labor, with IV ZDV during labor, and oral ZDV to the infant for 6 wks.
Presence of multinucleated giant cells (Aschoff cells) in myocardium points to what pathology?
Acute rheumatic carditis
NFT-1 is a tumor of what cells?
Schwann cells
What embryological cell type produces Schwann cells (neoplasms of which are neurofibromas, e.g. NFT-1)?
Neural crest cells
What are two common sites of ulnar nerve injury?
Posterior to the medial epicondyle, and between the hook of the hamate and the pisiform bone
What enzyme is deficient in Cori disease?
Debranching enzyme
How does Cori disease present?
Hypoglycemia, hypertriglyceridemia, ketoacidosis, hepatomegaly
Of all the mediators of allergic asthma, what are the two that have pharmacologic roles?
Leukotrienes, ACh
At what level does hypertriglyceridemia start to cause pancreatic acinar cell injury? How?
> 1000 mg/dL
By direct cytotoxicity
What are some drugs that can cause acute pancreatitis?
Azathioprine
Sulfasalazine
Furosemide
Valproic acid
What are some infections that cause acute pancreatitis?
Mumps
Coxsackie virus
Mycoplasma pneumoniae
What are the two most common causes of acute pancreatitis?
Alcohol and stones
What signaling pathway does GH use to activate IGF-1 release from the liver?
JAK-STAT
What clotting factors are missing in hemophilia A and B?
Hemophilia A: factor VIII
Hemophilia B: factor IX
What is urokinase? MOA?
Thrombolytic agent used for MI and PE
MOA: Converts plasminogen to plasmin (which degrades fibrinogen and fibrin)
Deficiency in fructokinase causes what benign condition?
Essential fructosuria
Which neoplasm is associated with tumors of the “3Ps”?
MEN 1: anterior Pituitary, Parathyroids, Pancreas
What vessels does nitroglycerin work on?
Large veins
