Recombinant Lectin Formulation for Stability and Low Aggregation
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Solution Overview
Problem
Current formulations of fungal lectins, such as Sclerotium rolfsii lectin (SRL), lack stability and effective therapeutic delivery for cancer treatment, facing challenges in maintaining solubility and conformational integrity due to their macromolecular nature and degradative properties.
Innovation Solution
A stable pharmaceutical composition comprising recombinant Sclerotium rolfsii lectin with specific amino acid sequences or modifications, combined with pharmaceutically acceptable excipients like amino acids, surfactants, and carbohydrates, formulated as liquid or lyophilized preparations to ensure stability and bioactivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If lectin is formulated as a macromolecular protein composition, then therapeutic efficacy for cancer treatment is achieved, but stability and conformational integrity are compromised due to degradative nature
Solution Approach 1:
The patent applies parameter changes by modifying the physical and chemical environment of the lectin through pH adjustment (to acidic ranges), temperature control (lyophilization at low temperatures), and concentration optimization. These parameter changes stabilize the macromolecular structure while preserving therapeutic efficacy against cancer cells.
Solution Approach 2:
The patent creates composite formulations by combining lectin with excipients and stabilizing agents. This composite approach protects the fragile macromolecular structure from degradation while maintaining biological activity, resolving the contradiction between stability and efficacy.
2Stability of the object's composition
If lectin is formulated with stabilizers and excipients, then stability is improved, but formulation complexity increases
Solution Approach 1:
The patent employs excipients that serve multiple functions simultaneously - for example, buffers that maintain pH (stability function) while also acting as solubility enhancers. This multi-functionality reduces the number of separate components needed, simplifying the overall formulation despite the need for stability.
Solution Approach 2:
The patent utilizes readily available, inexpensive excipients and stabilizers that can be easily incorporated and discarded after use. This approach manages formulation complexity by using simple, well-characterized materials rather than complex specialized additives.
3Duration of action of moving object
If lectin is stored as liquid formulation, then bioactivity is maintained, but aggregation and precipitation occur over shelf life
Solution Approach 1:
The patent utilizes phase transition from liquid to solid state through lyophilization (freeze-drying). This transitions the formulation to a stable solid form that prevents aggregation and precipitation during storage, while allowing reconstitution to liquid state for administration, thus maintaining bioactivity throughout the shelf life.
4Quantity of substance
If amino acid substitutions are made in lectin sequence, then solubility is improved, but conformational integrity may be compromised
Solution Approach 1:
The patent applies local quality changes by making targeted amino acid substitutions at specific positions in the lectin sequence that affect solubility without disrupting the overall conformational integrity. This localized modification approach improves solubility while preserving the essential structural features needed for therapeutic activity.
Data Source
AI summary
The present invention relates to stable formulations of recombinant proteins. The invention specifically relates to the formulations of recombinant lectins derived from Sclerotium rolfsii lectin. The formulation comprises recombinant lectin derived from Sclerotium rolfsii lectin and a pharmaceutically acceptable excipient. The invention also relates to the stable liquid and/or lyophilized formulations comprising recombinant lectins derived from Sclerotium rolfsii lectin.