Plasma Proteins (TOPIC 2 PROTEINS) Flashcards
Contain fibrinogen
Plasma proteins
No fibrinogen (consumed during coagulation)
6 % decrease in total protein content due to absence of fibrinogen.
Serum proteins
Composed 60% on the Total Protein
Albumin
Composed 40% on the Total Protein
Globulin
Alpha
Beta
Gamma
Examples of Prealbumin in plasma proteins electrophoretic mobility
Transthyretin,
thyroxine binding pre albumin
Examples of Albumin in plasma proteins electrophoretic mobility
Albumin
Examples of Alpha 1 globulin in plasma proteins electrophoretic mobility
Alpha1 anti-trypsin,
AFP (alpha feto protein),
alpha lipoprotein,
alpha-1-acid glycoprotein,
alpha-1-antichemotrypsin,
prothrombin
Examples of alpha 2 globulin in plasma proteins electrophoretic mobility
Ceruloplasmin,
haptoglobin,
alpha-2-macroglobulin,
erythropoietin
Examples of Beta globulin in plasma proteins electrophoretic mobility
Transferrin,
hemopexin,
beta-2-macroglobulin,
complement components,
fibrinogen,
VLDL,
LDL,
C-reactive protein (CRP)
Examples of Gamma globulin in plasma proteins electrophoretic mobility
Immunoglobulins (antibodies)
majority of Alpha 1 globulin
Alpha 1 anti-trypsin-
majority of alpha 2 globulin
Alpha 2 macroglobulin
majority of beta globulin
Transfeerrin
Also called transthyretin.
Prealbumin
Prealbumin aka
Transthyretin
Migrates faster than albumin. 2nd most predominant protein in CSF.
Prealbumin
Carrier protein for thyroid hormones specifically thyroid binding prealbumin (TBPA)
Prealbumin
The most sensitive indicator for poor nutritional status (< 10 mg/dl)
Life span: 2 days
Prealbumin
Greek word “albus” means white. Based on white precipitation developed when acidic urine is heated.
Albumin
Most predominant in plasma proteins
Albumin
Produced form the liver, Life span: 20 days
Albumin
Major transport carrier of most substances.
Albumin
Regulates the oncotic pressure (colloidal osmotic pressure)
Albumin
Albumin Increased in?
Dehydration
Prolong Torniquet Application
Albumin Decreased in?
Inflammation
Liver Diseases
Kidney Diseas
Gastrointestinal loss
Malnutrition
Burn Injury
Edema and acites
Globulins- conjugated proteins consist of:
Alpha1 globulin
Alpha-2 globulin
Beta globulin
Gamma globulin
Plasma protein Alpha-1-globulin Clinical Significance (elevated)
Infections and inflammatory disease such as
Acute hepatitis
Plasma protein Alpha-2-globulin Clinical Significance (elevated)
Nephrotic syndrome,
rheumatoid arthritis,
Systemic lupus erythematosus (SLE),
after myocardial infarction.
Plasma protein Beta globulin Clinical Significance (elevated)
Hyperlipidemia
Plasma protein Gamma globulin Clinical Significance (elevated)
Polyclonal gammopathy,
viral hepatitis,
rheumatoid arthritis,
leukemia
lymphomas
Decrease in Hodgkin’s disease
is a glycoprotein, inhibitors of plasma serine proteases. Deficiency leads to emphysema (chronic obstructive pulmonary disease).
α1-antitrypsin(majority)-
high carbohydrate content, carrier for steroid hormones. Elevated in neonates with bacterial infection
α1 acid glycoprotein-
also known as SERPIN major plasma serine proteinase inhibitor.
Alpha-1-antichymotrypsin
precursor of thrombin necessary for coagulation.
Prothrombin
synthesized in embryo and fetus. Elevated in Neural tube defect an low in Down syndrome. Serves as a tumor marker.
Alpha feto protein (AFP)-
transport protein for Copper (95 %), associated with Wilson’s disease
Ceruloplasmin
transport protein for free hemoglobin. (decrease in hemolytic anemia)
Haptoglobin
transport carrier for zinc in plasma and as a protease inhibitor. Elevated in diabetes, nephrotic syndrome and liver disease.
a2 macroglobulin
hormone produced in the kidney for erythropoiesis
Erythropoietin
Also known as Siderophilin, a transport protein for Iron. Accumulation iron leads to hemosiderin formation which can be stained with Perl’s Prussian blue.
Transferrin
transport protein for heme. (decrease in hemolytic anemia)
Hemopexin
part of Major histocompatility complex (MHC).
β2 macroglobulin-
precursor of fibrin involve in coagulation. Majority of coagulation factors.
Fibrinogen-
humoral immune response.
Complement factors-
carrier of lipids
VLDL and LDL-
precipitates C substance of pneumococci. Used as indicator for non specific inflammation.
C- reactive protein (CRP)-
A glycoprotein produced by plasma cells.
IgG
IgM
IgA
IgE
IgD
Other plasma proteins
Bence jones protein
Myoglobin
Troponin
Cystatin C
Amyloids
Cross-linked C-telopeptides
Adiponectin
B-Trace protein (BTP)
Fibronectin
Brain Netriuretic Peptide (BNP)
excreted in the urine by patient with Multiple myeloma.
Bence jones protein
used as marker for myocardial infarction (not specific)
Myoglobin
specific biomarker for Myocardial infarction.
Troponin
cysteine proteinase inhibitor, used to evaluate of renal function test or creatinine clearance test. A sensitive biomarker for diabetic kidney disease.
Cystatin C
insoluble fibrous protein aggregates due alteration in secondary structure. Deposition to tissues is called Amyloidosis, stained with Congo red.
Amyloids
biomarkers for bone resorption, used for clinical assessment of osteoarthritis
Cross-linked C-Telopeptides
produce by adipocytes. Low level indicates high risk to DM 2 and heart disease.
Adiponectin
brain specific proteins, biomarker for CSF leakage due to head trauma inflammation or tumor.
β-Trace protein (BTP)-
secreted during pregnancy, indicator for possible premature delivery for congestive heart failure
Fibronectin
inhibits angiotensin II and norepinephrine synthesis. Used as a diagnostic marker for heart failure.
Brain Natriuretic Peptide (BNP)-