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Year : 2016  |  Volume : 143  |  Issue : 7  |  Page : 23-31

Level of PAX5 in differential diagnosis of non-Hodgkin's lymphoma

1 Department of Zoology, Institute of Medical Sciences, Banaras Hindu University, Varanasi, India
2 Department of Pathology, Institute of Medical Sciences, Banaras Hindu University, Varanasi, India
3 Department of Surgical Oncology, Institute of Medical Sciences, Banaras Hindu University, Varanasi, India

Correspondence Address:
Rajnikant Mishra
Biochemistry & Molecular Biology Laboratory, Department of Zoology, Banaras Hindu University, Varanasi 221 005, Uttar Pradesh
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/0971-5916.191747

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Background & objectives: The PAX5, a paired box transcription factor and B-cell activator protein (BSAP), activates B-cell commitment genes and represses non-B-cell lineage genes. About 14 transcript variants of PAX5 have been observed in human. Any alteration in its expression pattern leads to lymphogenesis or associated diseases and carcinogenesis in non-lymphoid tissues. Its mechanisms of function in pathophysiology of non-Hodgkin's lymphoma (NHL) are unclear. This study was intended to explore influence of PAX5 in cascade of NHL pathogenesis and diagnosis. Methods: Samples of 65 patients were evaluated by immunohistochemical staining for cellular localization of PAX5, CD19, CD3, cABL, p53, Ras and Raf and by TUNEL assay, RNA-isolation and reverse transcriptase (RT)-PCR, w0 estern blot analysis, and lactate dehydrogenase (LDH) specific staining. Results: B-cell type NHL patients were positive for PAX5, p53, Ras, CD19, Raf and CD3. All of them showed TUNEL-positive cells. The differential expression pattern of PAX5, CD19, p53, CD3, Zap700 , HIF 1α, Ras, Raf and MAPK (mitogen-activated protein kinase) at the levels of transcripts and proteins was observed. The LDH assay showed modulation of LDH4 and LDH5 isoforms in the lymph nodes of NHL patients. Interpretation & conclusions: The histological observations suggested that the patients represent diverse cases of NHL like mature B-cell type, mature T-cell type and high grade diffuse B-cell type NHL. The findings indicate that patients with NHL may also be analyzed for status of PAX5, CD19 and ZAP70, and their transcriptional and post-translational variants for the differential diagnosis of NHL and therapy.

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