Understanding the function of proteins like-Antitrypsin is crucial for developing effective treatments.
Emphysema is a chronic lung condition often caused by a deficiency of α-1 antitrypsin (AAT), a protein produced in the liver that protects lung tissue from damage by enzymes like neutrophil elastase.
(A) refers to a hormone, but α-1 antitrypsin is a protein, not a hormone.
(B) α-Interferon is used for viral infections and certain cancers, not emphysema.
(D) α-Lactalbumin is a milk protein and not related to emphysema treatment.
Thus, the correct treatment for emphysema caused by AAT deficiency is human α-1 antitrypsin protein (option C), which is administered as augmentation therapy.
Emphysema is a chronic respiratory disease characterized by the destruction of alveolar walls , leading to reduced lung elasticity. A major cause of emphysema is α-Antitrypsin deficiency , which results in unchecked activity of proteolytic enzymes like elastase. Elastase breaks down elastic fibers in the lungs, causing structural damage.
To treat emphysema caused by α-Antitrypsin deficiency, replacement therapy is used. This involves administering purified human α-Antitrypsin protein derived from blood plasma. The enzyme inhibits elastase and restores balance in the lungs.
A block of certain mass is placed on a rough floor. The coefficients of static and kinetic friction between the block and the floor are 0.4 and 0.25 respectively. A constant horizontal force \( F = 20 \, \text{N} \) acts on it so that the velocity of the block varies with time according to the following graph. The mass of the block is nearly (Take \( g = 10 \, \text{m/s}^2 \)):
A wooden block of mass M lies on a rough floor. Another wooden block of the same mass is hanging from the point O through strings as shown in the figure. To achieve equilibrium, the coefficient of static friction between the block on the floor and the floor itself is