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Isolation and study of functional mast cells from lung and mesentery of the guinea pig
Abstract:
A method is described for the dissociation of guinea pig lung and mesentery into their component cells. The method comprises incubation of the tissues with the enzyme pronase in Ca++- and Mg++-free saline followed by mechanical dispersion and yields on average 3-8% free mast cells. These cells are morphologically intact and viable. They retain an active sensitization or can be passively sensitized. The levels of cAMP and cGMP in the whole cell suspension respond to catecholamine, histamine or cholinergic stimulation in a way similar to that observed in the corresponding undispersed tissue. Although the separation of guinea pig mast cells from other cells proved to be more difficult than the purification of rat mast cells, an inrichment of greater than 50% has been achieved. The mast cells isolated by this method proliferate in vitro and have been cultured successfully for several months.
Insights
Researchers developed a new method to isolate guinea pig mast cells from lung and mesentery tissues. These purified mast cells are viable, functional, and can be cultured long-term for further study.
Area of Science:
- Immunology and Cell Biology
- Pharmacology
Background:
- Mast cells play a crucial role in allergic reactions and immune responses.
- Isolating pure mast cell populations is essential for studying their function and developing targeted therapies.
Purpose of the Study:
- To establish a reliable method for dissociating guinea pig lung and mesentery tissues.
- To isolate viable and functional mast cells for in vitro research.
- To characterize the properties of isolated guinea pig mast cells.
Main Methods:
- Tissue dissociation using pronase enzyme in a Ca++- and Mg++-free saline solution.
- Mechanical dispersion to release component cells.
- Assessment of mast cell viability, morphology, and sensitization capacity.
Main Results:
- The method yields 3-8% free mast cells that are morphologically intact and viable.
- Isolated mast cells retain active or passive sensitization capabilities.
- Cellular responses (cAMP, cGMP levels) to various stimuli mimic those in undispersed tissue.
- Achieved >50% enrichment of guinea pig mast cells.
- Isolated mast cells demonstrate in vitro proliferation and successful long-term culture.
Conclusions:
- This novel method effectively isolates functional guinea pig mast cells from lung and mesentery.
- The isolated mast cells are suitable for in vitro studies of cellular responses and long-term culture.
- This technique advances research into mast cell-mediated inflammatory and immune processes.
