Govt. Exams
GMP compliance requires continuous monitoring of critical quality attributes (CQAs): viable cell density, viability percentage, and product titer. Real-time monitoring ensures batch consistency and safety.
Microcarriers (Cytodex, Microcarrier, etc.) provide surface area for anchorage-dependent cells in suspension bioreactors, combining advantages of both culture systems.
Modern Indian biotech (2024-25) is shifting toward single-use bioreactors for flexibility, ACF/serum-free media for safety, and automation for consistency in line with global standards.
Suspension cultures (used for hybridomas, CHO cells) allow cells to grow freely, achieve higher densities, and scale more easily than adherent cultures which require surface attachment.
The glucose consumption rate and lactate production rate indicate metabolic efficiency. High lactate accumulation suggests metabolic stress and can inhibit cell growth.
While CHO cells are used for complex proteins, E. coli is the primary system for insulin production in Indian industries due to cost-effectiveness and regulatory acceptance. However, CHO is also important for other biologics.
While cells need oxygen for respiration, excessive DO can cause oxidative stress. Moderate DO levels (30-50% saturation) optimize growth and reduce lactate accumulation.
Perfusion culture continuously removes metabolic waste and supplies fresh medium while retaining cells, resulting in higher cell densities and productivity compared to batch culture.
5% CO2 maintains pH through bicarbonate buffering, 5% O2 provides aerobic respiration, and N2 balances the gas mixture. This mimics physiological conditions.
Passage number indicates how many times cells have been subcultured/transferred. Higher passage numbers may result in senescence and altered cell characteristics.
