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. 2024 Apr 29:29:20.
doi: 10.4103/jrms.jrms_141_23. eCollection 2024.

The evaluation of human endogenous retroviral env expression in normal and cancerous tissues of the breast

Shaian Tavakolian  1   2 , Hossein Goudarzi  3 , Ebrahim Faghihloo  3
Affiliations

The evaluation of human endogenous retroviral env expression in normal and cancerous tissues of the breast

Shaian Tavakolian et al. J Res Med Sci. .

Abstract

Background: Both internal and external risk factors can accelerate the progression of breast cancer which is the reason why clinicians have tried to find new biomarkers for this health problem. Human endogenous retrovirus-W (HERV-W) can be one of these biomarkers, as it has been mentioned that some genes of this virus are able to have either higher or lower expression in numerous cancerous cells. In this study, we aimed to compare HERV-W envelope expression in breast cancer tissues and normal ones since its effects on this malignancy have not been clear.

Materials and methods: We collected 46 breast cancer tissues and their normal adjacent ones. After extracting the RNA of breast samples, we evaluated the expression of HERV-W envelope syncytin-1 and 2 using quantitative real-time polymerase chain reaction (PCR) in different kinds of breast cancer stages.

Results: Data showed that more than 13% of patients had a family history of breast cancer; moreover, approximately half of the tissues were estrogen receptor or progesterone receptor positive. Lymph node metastasis was seen in 52% of the patients, and about 40% of tumors were larger than 2 cm. Real-time PCR showed that syncytin-1 and 2 had upward regulation with (*P < 0.05) and (**P < 0.01), respectively.

Conclusion: As the expression of HERV-W Env (syncytin-1, syncytin-2) was higher in breast cancerous tissues in comparison with normal ones, we believe that these genes may have a role to play in monitoring patients suffering from this type of cancer. However, further studies are needed to confirm this hypothesis.

Keywords: Breast; cancer; syncytin- 2; syncytin-1.

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Conflict of interest statement

There are no conflicts of interest.

Figures

Figure 1
Figure 1
(a-c) Given is a figure illustrating syncytin-1 in breast cancerous tissues increased slightly, experiencing an up-ward regulation with (*P < 0.05). HERV = Human endogenous retrovirus
Figure 2
Figure 2
(a-c) Syncytin-2 had a similar pattern (with a higher intensive trend), and showed a surge in expression of syncytin-2 in breast cancerous tissues with (**P < 0.01). HERV = Human endogenous retrovirus
See this image and copyright information in PMC

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