Cytiva Xcellerex™ X-50 Single-Use Bioreactor

Overview

The Cytiva Xcellerex™ X-50 is a scalable, single-use bioreactor system engineered for high-performance mammalian cell culture under cGMP-compliant manufacturing conditions. Operating on the principles of controlled hydrodynamic mixing, optimized gas–liquid mass transfer (O₂ uptake and CO₂ removal), and low-shear impeller dynamics, the X-50 integrates magnetically coupled bottom-driven agitation with an advanced sparging and baffling architecture. Its design leverages computational fluid dynamics (CFD) modeling to ensure uniform shear distribution, predictable oxygen transfer rates (k_La), and minimal mechanical stress on sensitive suspension cells—critical for high-titer monoclonal antibody (mAb) and recombinant protein production. The system supports both bench-scale process development and clinical- or commercial-scale manufacturing, with seamless scalability from 5 L to 2000 L across the X-platform family.

Key Features

• Magnetically coupled bottom-drive agitator enabling low minimum working volume (down to 20% of nominal capacity) and reduced bag footprint for efficient storage and logistics
• CFD-optimized impeller geometry, integrated baffles, and multi-port gas distribution manifold to maximize O₂ transfer efficiency while minimizing foaming and CO₂ accumulation
• Modular, standardized vessel frame with ergonomic access door, integrated cable management, and tool-free bag mounting for rapid changeover and reduced operator intervention
• Four pre-qualified, gamma-irradiated single-use bag configurations—supporting batch, fed-batch, and perfusion modes—with built-in sensors (pH, DO, temperature) and sterile fluid path connectors
• Wide operational power input range (0.1–5 W/m³) validated across scales, enabling robust scale-up correlation without requalification of critical process parameters

Sample Compatibility & Compliance

The Xcellerex™ X-50 is validated for use with suspension-adapted CHO, HEK293, and hybridoma cell lines under serum-free and chemically defined media formulations. All contact surfaces comply with USP Class VI biological safety requirements and ISO 10993-5 cytotoxicity standards. Bag materials meet FDA 21 CFR Part 11 and EU Annex 11 data integrity expectations when paired with Figurate™ automation. System qualification packages support IQ/OQ/PQ execution in alignment with ICH Q5D, Q5A(R2), and ASTM E2500-13 guidelines. Full traceability of consumables—including lot-specific extractables/leachables reports—is provided for regulatory submissions.

Software & Data Management

Controlled by the Figurate™ automation platform running on Rockwell Automation’s PlantPAx® DCS, the X-50 delivers deterministic sequence execution, audit-trail-enabled parameter logging, and electronic signature support per FDA 21 CFR Part 11. Process data—including real-time dissolved oxygen, pH, temperature, agitation speed, gas flow rates, and feed volumes—is time-stamped, encrypted, and exportable in CSV or ASAM-ODS format. Integrated historian functionality enables trend analysis, deviation investigation, and multivariate statistical process control (MSPC). Remote monitoring via secure TLS 1.2–encrypted web interface allows authorized personnel to review live KPIs and initiate predefined recovery protocols during off-shift hours.

Applications

• Upstream process development and tech transfer for mAbs, bispecifics, and Fc-fusion proteins
• cGMP-compliant clinical manufacturing (Phase I–III) and commercial launch batches
• High-density perfusion cultures requiring sustained viability (>95%) over 60+ days
• Process characterization studies evaluating oxygen limitation thresholds, pH setpoint interactions, and feed strategy robustness
• Comparative evaluation of single-use vs. stainless-steel platforms in parallel bioreactor campaigns

FAQ

What are the maximum and minimum working volumes supported by the X-50?

The Xcellerex™ X-50 operates between 10 L and 50 L nominal capacity, with validated performance down to 10 L (20% fill level) and up to 50 L (100% fill level) using the standard 50 L bag configuration.
Is the system compatible with existing Cytiva upstream workflows and analytics?

Yes—the X-50 integrates natively with Cytiva’s ÄKTA™ chromatography systems, UNICORN™ software, and BioProcess Systems Analytics (BPSA) suite for end-to-end digital process tracing.
Does the X-50 support PAT (Process Analytical Technology) integration?

Yes—via analog/digital I/O modules and OPC UA connectivity, the system accepts real-time inputs from Raman spectrometers, at-line HPLC, and capacitance-based viable cell density probes.
What service-level agreements (SLAs) are available through OptiRun™?

OptiRun™ offers tiered support options including 24/7 remote diagnostics, guaranteed 4-hour onsite response for critical failures, predictive maintenance alerts, and annual preventive service contracts aligned with ISPE GAMP 5 validation lifecycle requirements.