Casein-induced experimental amyloidosis. IX. Alterations in marrow dependent function

Area of Science:

• Immunology
• Pathogenesis of Amyloidosis
• Marrow-Dependent Functions

Background:

• Amyloidosis is a complex disease affecting multiple organ systems.
• Marrow-dependent functions play a crucial role in immune responses.
• The relationship between amyloidosis and immune function requires further investigation.

Purpose of the Study:

• To investigate the impact of amyloidosis on marrow-dependent immune functions in mice.
• To assess the ability of mice to reject bone marrow allografts and resist viral-induced immune suppression.

Main Methods:

• CBA/J mice were administered multiple injections of sodium caseinate (CAS) or bovine serum albumin (BSA).
• Marrow-dependent functions were evaluated by measuring allograft rejection and resistance to Friend virus (FV)-induced suppression of lymphocyte mitogenesis.
• Mice were categorized as amyloid, pre-amyloid, or non-amyloid based on treatment and condition.

Main Results:

• Mice that developed amyloidosis lost the ability to reject allogeneic marrow cells.
• Non-amyloid BSA-treated mice exhibited enhanced rejection of marrow allografts.
• Pre-amyloid mice (CAS-injected) and non-amyloid mice (BSA-injected) showed increased resistance to FV-induced suppression.
• Amyloid mice were as susceptible to FV-induced suppression as control mice.

Conclusions:

• Alterations in marrow-dependent functions are linked to the pathogenesis of amyloid disease.
• Amyloidosis significantly impairs immune functions, particularly allograft rejection.
• Early stages of amyloidosis (pre-amyloid) may involve altered immune responses, including enhanced viral resistance.