MUM-1 in canine lymphoma: A pilot study

Area of Science:

• Veterinary Pathology
• Immunohistochemistry
• Oncology

Background:

• Interferon regulatory factor 4 (IRF4)/multiple myeloma oncogene-1 (MUM1) expression in human peripheral T-cell lymphoma (PTCL) correlates with poorer survival.
• MUM1's role in canine lymphoma is not well-established.

Purpose of the Study:

• To investigate MUM1 expression in canine peripheral T-cell lymphoma not otherwise specified (PTCL-NOS).
• To compare MUM1 expression in PTCL-NOS with canine diffuse large B-cell lymphoma (DLBCL).

Main Methods:

• Immunohistochemical analysis was performed on 9 cases of PTCL-NOS and 9 cases of DLBCL.
• MUM1 antigen presence was assessed using specific labeling.

Main Results:

• MUM1 expression was identified in 2 out of 9 PTCL-NOS cases.
• MUM1 expression was observed in 3 out of 9 DLBCL cases.
• These findings indicate that neoplastic T and B lymphocytes can express MUM1.

Conclusions:

• A subset of canine T-cell and B-cell lymphomas express MUM1.
• Further research with larger cohorts is needed to determine MUM1's impact on canine lymphoma prognosis and behavior.