Related Experiment Video
Updated: Jan 21, 2026
07:15
Mechanism of Kemeng Fang's Inhibition of Podocyte Apoptosis in Rats with Membranous Nephropathy through the PI3K/AKT Signaling Pathway
Published on: August 23, 2024
875
IRF4 Enhances Radiosensitivity of Cervical Cancer by Inhibiting the PI3K/Akt/mTOR Pathway to Regulate Autophagy
Meihui Gao1, Zhaolei Cui2, Huachun Song3
1Department of Gynecology, Clinical Oncology School of Fujian Medical University, Fujian Cancer Hospital, Fuzhou, Fujian, China.
Cancer Science
|January 19, 2026
Summary
Interferon regulatory factor 4 (IRF4) is decreased in cervical cancer, suppressing tumor growth and enhancing radiosensitivity. IRF4 promotes autophagy via the PI3K/Akt/mTOR pathway, offering a potential therapeutic target for improving radiotherapy outcomes.
Area of Science:
- Oncology
- Molecular Biology
- Cell Biology
Background:
- Cervical cancer remains a significant global health challenge.
- The precise role of Interferon regulatory factor 4 (IRF4) in cervical cancer pathogenesis is not well understood.
- Identifying novel therapeutic targets is crucial for improving treatment efficacy.
Purpose of the Study:
- To investigate the biological role of IRF4 in cervical cancer.
- To determine the effect of IRF4 on cervical cancer progression and radiosensitivity.
- To elucidate the underlying molecular mechanisms, including its impact on autophagy and the PI3K/Akt/mTOR pathway.
Main Methods:
- Immunohistochemistry, immunoblotting, CCK-8 assays, EdU incorporation, clonogenic survival assays, flow cytometry, transmission electron microscopy, immunofluorescence, and heterotopic transplantation models.
- Overexpression of IRF4 in cervical cancer cell lines (Siha and HeLa).
- Inhibition of the PI3K/Akt/mTOR pathway and induction of autophagy.
Main Results:
- IRF4 expression was significantly downregulated in cervical cancer tissues and cell lines compared to normal controls.
- IRF4 overexpression inhibited cervical cancer cell proliferation, migration, and invasion.
- IRF4 enhanced radiosensitivity by upregulating autophagy-related proteins (LC3, Beclin-1), promoting autophagosome formation, and downregulating P62 through PI3K/Akt/mTOR pathway inhibition.
- In vivo studies confirmed IRF4's role in augmenting tumor response to radiation, with synergistic effects observed when combined with rapamycin.
Conclusions:
- IRF4 acts as a tumor suppressor in cervical cancer.
- IRF4 enhances radiosensitivity by modulating autophagy via the PI3K/Akt/mTOR pathway.
- IRF4 represents a promising therapeutic target for improving cervical cancer radiotherapy outcomes.
Related Concept Videos
01:22PI3K/mTOR/AKT Signaling Pathway
5.4K
The mammalian target of rapamycin (mTOR) is a serine/threonine kinase that regulates growth, proliferation, and cell survival in response to hormones, growth factors, or nutrient availability. This kinase exists in two structurally and functionally distinct forms: mTOR complex 1 (mTORC1) and mTOR complex 2 (mTORC2). The first form (mTORC1) is composed of a rapamycin-sensitive Raptor and proline-rich Akt substrate, PRAS40. In contrast, mTORC2 consists of a...
5.4K
03:03mTOR Signaling and Cancer Progression
4.6K
The mammalian target of rapamycin or mTOR protein was discovered in 1994 due to its direct interaction with rapamycin. The protein gets its name from a yeast homolog called TOR. The mTOR protein complex in mammalian cells plays a major role in balancing anabolic processes such as the synthesis of proteins, lipids, and nucleotides and catabolic processes, such as autophagy in response to environmental cues, such as availability of nutrients and growth factors.
The mTOR pathway or the...
The mTOR pathway or the...
4.6K
00:46Feedback Inhibition
56.9K
Biochemical reactions are occurring constantly in cells, converting starting substances to different products, usually with the help of enzymes that speed the reactions. Without enzymes, it would take far too long for most reactions to occur to be useful to the cell!
56.9K
02:14GTPases and their Regulation
9.8K
Guanine nucleotide-binding proteins (G-proteins), also known as GTPases, are a superfamily of proteins that regulate many cellular processes, such as cell signaling, vesicular transport, and the regulation of cell shape and motility. Mutation or dysfunction of these proteins can lead to disease. There are around 40,000 known G-proteins that can broadly be classified into two groups ‒ small G-proteins consisting of a single domain and large multi-domain G-proteins.
Large G-proteins,...
Large G-proteins,...
9.8K
02:23Master Transcription Regulators
7.7K
Master transcription regulators are regulatory proteins that are predominantly responsible for regulating the expression of multiple genes. Often these genes work in concert to drive a complex process. Activation of a master transcription regulator can lead to a cascade of transcriptional activation necessary for that outcome. These regulators can directly bind to the regulatory sequences of the various genes involved, or they can indirectly regulate transcription by binding to regulatory...
7.7K
01:27Autophagy
5.7K
Autophagy is a self-digesting process by which a cell protects itself from threats both within and outside the cell, ranging from abnormal proteins to invading bacteria. In this process, obsolete components of the cell and invading microbes are degraded by hydrolytic enzymes active in an acidic environment of the lysosomal lumen.
An autophagic pathway consists of a series of signaling events activated in response to diverse stress and physiological conditions such as food deprivation,...
An autophagic pathway consists of a series of signaling events activated in response to diverse stress and physiological conditions such as food deprivation,...
5.7K