Related Experiment Videos
Immunocytochemical localization of immunoglobulins in disc herniations
A Habtemariam1, M Grönblad, J Virri
1First Department of Surgery, Helsinki University Central Hospital, Finland.
Insights
Immunoglobulin deposits were found in over half of herniated discs, suggesting an immune response in disc herniation. These immune complexes were not detected in healthy disc tissue.
Area of Science:
- Immunology
- Pathology
- Biochemistry
Background:
- Herniated disc tissue shows high phospholipase A2 activity and inflammatory cells.
- Previous biochemical studies detected immunoglobulins G and M, but not their tissue-level location.
Purpose of the Study:
- To investigate immunoglobulin complexes in herniated disc tissue using immunocytochemistry.
- To compare findings with control disc tissue and analyze immunoglobulin M and G prevalence.
Main Methods:
- Immunocytochemical analysis of 52 herniated discs and 3 control discs.
- Use of monoclonal antihuman antibodies for immunoglobulins M and G detection.
Main Results:
- Immunoglobulin M deposits observed in 56% and immunoglobulin G in 35% of herniated discs.
- Immunoglobulin deposits were absent in control discs and located near blood vessels.
- Morphology suggested the presence of immune complexes.
Conclusions:
- Findings support the role of inflammation and immune reactions in disc herniations.
- Demonstrated immunoglobulins suggest immune deposition in herniated disc tissue.
- Further research is needed to clarify the exact role of these immunoglobulins in disc pathophysiology.
Study Design:
Disc herniation and control discs were studied for the presence of immunoglobulins immunocytochemically.
Objectives:
To study a possible presence of immunoglobulin complexes in herniated disc tissue and to locate them at the tissue level by immunocytochemistry; to compare immunohistologic findings with those obtained in control disc tissue; and to compare the prevalences of immunoglobulin M and immunoglobulin G.
Summary Of Background Data:
In herniated disc tissue, high activity of inflammatory phospholipase A2 was previously demonstrated, and inflammatory cells were noted immunohistochemically. Immunoglobulins G and M were observed biochemically but have not been located at the tissue level.
Methods:
Fifty-two disc herniations and three macroscopically normal fresh cadaver discs were managed by an identical immunocytochemical protocol, using monoclonal antihuman antibodies to immunoglobulins M and G.
Results:
In 29 of 52 disc herniations (56%), immunoglobulin M deposits were observed, and in 18 of 52 disc herniations (35%) immunoglobulin G could be demonstrated. Almost all the disc herniations where immunoglobulin G was present also contained immunoglobulin M deposits (except for two). In the control discs studied, neither immunoglobulin could be observed immunohistochemically. The immunoglobulin deposits were noted in areas where blood vessels were also present. Morphologically, immunoglobulin immunoreactivity resembling immune complexes was observed.
Conclusions:
The results lend support to previous suggestions of inflammation and immune reaction in disc herniations, including previous biochemical studies suggesting immunoglobulin deposition. The exact role of the demonstrated immunoglobulins in disc tissue pathophysiology will have to be clarified further.