Stable overexpression of miRNAs in bone marrow-derived murine mast cells using lentiviral expression vectors
Ramon J Mayoral1, Silvia Monticelli
1Institute for Research in Biomedicine, Bellinzona, Switzerland.
Abstract:
MicroRNAs (miRNAs) constitute a class of molecules regulating gene expression in many different cell types, including cells of the mammalian immune system. Indeed, changes in miRNA expression patterns have been implicated in various physiological and pathological processes. Mast cells (MCs) are hematopoietic cells that originate in the bone marrow and migrate into the tissues, where they mature and reside. They have an important immunoregulatory and effector role in IgE-associated allergic disorders, as well as in certain innate and adaptive immune responses. An effective way to explore the functions of miRNAs in murine MCs includes the modification of miRNA expression in primary bone marrow-derived mast cells (BMMCs), followed by the analysis of the phenotypic consequences of such perturbation. In this chapter, we describe how to differentiate BMMCs and transduce them with lentiviruses. As an example, we expressed miR-221 and miR-222, which showed stable expression in BMMCs and acted as post-transcriptional regulators of c-Kit expression.
Insights
This study explores microRNA (miRNA) functions in mast cells (MCs). Researchers modified miRNA expression in bone marrow-derived mast cells (BMMCs) to understand their role in immune responses and gene regulation.
Area of Science:
- Immunology
- Molecular Biology
- Gene Regulation
Background:
- MicroRNAs (miRNAs) are key regulators of gene expression across various cell types, including the immune system.
- Altered miRNA expression is linked to numerous physiological and pathological conditions.
- Mast cells (MCs) play crucial roles in allergic disorders and immune responses.
Purpose of the Study:
- To investigate the functional roles of specific microRNAs (miRNAs) in murine mast cells (MCs).
- To establish a method for modifying miRNA expression in primary bone marrow-derived mast cells (BMMCs) for functional studies.
Main Methods:
- Differentiation of primary bone marrow-derived mast cells (BMMCs).
- Transduction of BMMCs using lentiviral vectors to modify miRNA expression.
- Analysis of phenotypic consequences following miRNA perturbation.
Main Results:
- Successfully expressed miR-221 and miR-222 in BMMCs with stable expression.
- Demonstrated that these miRNAs function as post-transcriptional regulators of c-Kit expression in BMMCs.
Conclusions:
- Lentiviral transduction is an effective method for studying miRNA function in BMMCs.
- miR-221 and miR-222 are identified as post-transcriptional regulators of c-Kit, impacting mast cell function.
