Correlations between ldh isoenzyme patterns and brushing cytology in ulcerative colitis

Area of Science:

• Gastroenterology
• Oncology
• Biochemistry

Background:

• Ulcerative colitis (UC) is a chronic inflammatory bowel disease.
• Assessing cellular atypia in UC is crucial for early detection of malignant changes.
• Lactate dehydrogenase (LDH) isoenzymes may offer insights into cellular metabolic activity and regeneration.

Purpose of the Study:

• To investigate the relationship between cytological atypia and LDH isoenzyme patterns in ulcerative colitis.
• To determine if LDH isoenzyme alterations can serve as biomarkers for precancerous changes in UC.

Main Methods:

• Cytological, histological, and histochemical analysis of rectal samples from UC patients and controls.
• Classification of UC samples into three groups based on cellular atypia (A, B, C).
• Analysis of LDH isoenzyme patterns, focusing on M polypeptide levels.

Main Results:

• Statistically significant differences in M polypeptide levels were observed between UC groups (A, B, C) and between UC groups B/C and normal controls.
• Group C, exhibiting the highest M percentages, correlated with large single or double nucleoli, suggesting active cellular regeneration.
• LDH isoenzyme modifications were linked to the degree of cellular atypia in UC.

Conclusions:

• The observed LDH isoenzyme alterations, particularly M polypeptide levels, reflect active cellular regeneration in ulcerative colitis.
• Histochemical analysis of LDH isoenzymes may hold potential for detecting early malignant changes in long-standing UC.
• Further investigation is warranted to validate LDH isoenzymes as predictive markers for cancer in UC patients.