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Mitogenic activity of Mycoplasma pulmonis. II. Studies on the biochemical nature of the mitogenic factor
Abstract:
The mitogenic activity of Mycoplasma pulmonis has been demonstrated to reside in the membrane of this microorganism. Studies aimed at the identification of the membraneous mitogenic factor have revealed that membrane proteins are essential components of this mitogenic manifestation. In addition, it has been shown that the micro-organism's outer surface membrane proteins are responsible for mitogenic activity. It has been shown, however, that isolated membrane lipids are not mitogenic for rat lymphocytes and are not required for the membrane's mitogenic potential.
Insights
The mitogenic activity of Mycoplasma pulmonis resides in its membrane, specifically outer surface membrane proteins. Membrane lipids alone do not cause this mitogenic effect in rat lymphocytes.
Area of Science:
- Microbiology
- Immunology
Background:
- Mycoplasma pulmonis is known to possess mitogenic activity.
- The location of this mitogenic activity within the microorganism has been investigated.
Purpose of the Study:
- To identify the specific component(s) responsible for the mitogenic activity of Mycoplasma pulmonis.
- To determine the role of membrane proteins and lipids in this mitogenic effect.
Main Methods:
- Studies involving the isolation and analysis of Mycoplasma pulmonis membrane components.
- Testing the mitogenic potential of isolated membrane proteins and lipids on rat lymphocytes.
Main Results:
- Mitogenic activity was localized to the membrane of Mycoplasma pulmonis.
- Membrane proteins were identified as essential components for mitogenic activity.
- Outer surface membrane proteins were specifically implicated in the mitogenic response.
- Isolated membrane lipids showed no mitogenic activity and were not required for the membrane's mitogenic potential.
Conclusions:
- The mitogenic activity of Mycoplasma pulmonis is primarily attributed to its outer surface membrane proteins.
- Lipids within the membrane are not the source of mitogenic activity.