Dynamic Microfluidic Ex Vivo System for Multiple Myeloma Cell Viability
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Solution Overview
Problem
Current methods struggle to maintain the viability and propagation of multiple myeloma cells ex vivo due to the difficulty in replicating the complex bone marrow microenvironment, leading to short-lived cell growth and limited understanding of the disease progression and treatment efficacy.
Innovation Solution
A dynamic microfluidic ex vivo system is developed, featuring a three-dimensional tissue construct with self-organized osteoblasts and an extracellular matrix, dynamically perfused with nutrients and gases, which recreates a bone marrow niche to sustain multiple myeloma cells and facilitate their interaction with osteoblasts, allowing for prolonged cell viability and propagation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If conventional static culture methods are used, then the system is simple to operate, but the multiple myeloma cells cannot be maintained viably for extended periods
Solution Approach 1:
The patent implements a dynamic microfluidic system with continuous flow through the bone marrow niche, replacing static culture conditions. The system uses pumps to perfuse nutrients and growth factors through the 3D construct, creating dynamic mechanical stimuli that mimic in vivo bone marrow conditions and maintain cell viability for extended periods
Solution Approach 2:
The patent creates a hierarchical structure where osteoblasts form a 3D bone marrow niche that nests multiple myeloma cells within its microenvironment. The osteoblasts self-organize into a complex architecture that provides shelter and biochemical signals to the myeloma cells, creating a protected nested environment that prolongs cell survival
2Reliability
If a complex bone marrow microenvironment is replicated, then cell propagation is sustained, but the difficulty of recreating the niche increases
Solution Approach 1:
The patent employs osteoblasts that self-organize into a functional bone marrow niche without requiring external scaffolding or complex engineering. The osteoblasts autonomously create the extracellular matrix, secrete appropriate growth factors, and establish the biochemical and mechanical properties of the bone marrow microenvironment, simplifying the overall system construction
Solution Approach 2:
The patent modifies key parameters of the culture system including oxygen tension, nutrient composition, and flow dynamics to match in vivo bone marrow conditions. By adjusting these parameters rather than replicating the entire complex architecture, the system achieves reliable cell propagation with simplified manufacturing
3Loss of information
If myeloma cells are cultured without osteoblast interaction, then the culture system is simpler, but the understanding of disease progression is limited
Solution Approach 1:
The patent combines multiple cell types (osteoblasts and multiple myeloma cells) into a single integrated 3D culture system where they interact through direct contact and paracrine signaling. This merged system preserves the cell-cell and cell-matrix interactions that occur in vivo, providing comprehensive information about disease progression and treatment responses
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This system effectively maintains the viability of multiple myeloma cells for extended periods, enabling the study of disease progression and the evaluation of chemotherapeutic agents, thereby improving the assessment of treatment efficacy and understanding of the bone marrow microenvironment's role in cancer.
Implementation Method 1
a dynamic microfluidic ex vivo system
Implementation Method 2
dynamically perfused by nutrients and dissolved gas molecules
Implementation Method 3
an extracellular matrix secreted by the viable adherent osteoblasts
Implementation Method 4
a mineralized bone-like tissue
Data Source
AI summary
The described invention provides an ex vivo dynamic multiple myeloma (MM) cancer niche contained in a microfluidic device. The dynamic MM cancer niche includes (a) a three-dimensional tissue construct containing a dynamic ex vivo bone marrow (BM) niche, which contains a mineralized bone-like tissue containing viable osteoblasts self-organized into cohesive multiple cell layers and an extracellular matrix secreted by the viable adherent osteoblasts; and a microenvironment dynamically perfused by nutrients and dissolved gas molecules; and (b) human myeloma cells seeded from a biospecimen composition comprising mononuclear cells and the multiple myeloma cells. The human myeloma cells are in contact with osteoblasts of the BM niche, and the viability of the human myeloma cells is maintained by the MM cancer niche.