Acta Vet. Brno 2023, 92: 79-88

Effect of Tarantula cubensis alcoholic extract on tumour pathways in azoxymethane-induced colorectal cancer in rats

Gokhan Akcakavak1, Ozgur Ozdemır2

1Yozgat Bozok University, Faculty of Veterinary Medicine, Department of Pathology, Sorgun, Yozgat, Türkiye
2Selcuk University, Faculty of Veterinary Medicine, Department of Pathology, Selcuklu, Konya, Türkiye

Received April 3, 2022
Accepted December 8, 2022

The aim of this study was to determine the effects of Tarantula cubensis alcoholic extract (TCAE) on tumour development pathways in azoxymethane (AOM)-induced colorectal cancer in rats by molecular methods. Eighteen paraffin-embedded intestinal tissues, six from each group, were studied in the healthy control (C), cancer control (CC), cancer + TCAE (C-TCAE) groups. Sections of 5 µm thickness were taken from the paraffin blocks and submitted to staining with haematoxylin-eosin. In the histopathological examination, the number of crypts forming aberrant crypt foci (ACF) and the degree of dysplasia in the crypts were scored. Real-time PCR analysis was completed to determine β-catenin, KRAS (Kirsten rat sarcoma virus), APC (adenomatous polyposis coli) and P53 expressions on samples from each paraffin block. The grading scores of the number of crypts forming ACF and dysplasia in the crypts showed an evident decrease in the C-TCAE group in comparison to the CC group (P < 0.05). In real-time PCR analysis, mRNA expression levels of P53 (P > 0.05) and APC (P < 0.001) genes were found to be increased in the C-TCAE group according to the CC group. The expression levels of KRAS (P < 0.01) and β-catenin (P < 0.005) mRNA were found significantly decreased in the C-TCAE group. In conclusion, the effects of TCAE on AOM-induced colorectal cancer (CRC) in rats were evaluated molecularly; TCAE was found to modulate some changes in CRC developmental pathways, inhibiting tumour development and proliferation, and stimulating non-mutagenic tumour suppressor genes. Thus, it can be stated that TCAE is an effective chemopreventive agent.


This research was supported by Selçuk University Scientific Research Project Coordinator with project number 19202084 within the scope of the thesis project. This article was produced from the thesis subject of the first author. The author completed his PhD as a fellow of YÖK 100/2000 (Molecular Pathology) and TUBITAK 2211-A, and would like to thank both institutions for their support during his PhD education.


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