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| Transketolase is a key enzyme in the non-oxidative arm of the pentose phosphate pathway (PPP), and alterations in its expression or activity can affect cellular metabolism, redox balance, and biosynthetic processes that are critical for rapidly proliferating cancer cells. – Role: TKT catalyzes the reversible transfer of two-carbon units between sugars in the non-oxidative PPP. – Impact: By contributing to the generation of ribose-5-phosphate for nucleotide synthesis and influencing the production of NADPH, TKT activity supports both biosynthetic demands and antioxidative defense in tumor cells. -Alterations in TKT expression can therefore impact the balance between ROS generation and detoxification, influencing cell survival and chemoresistance. -Inhibition of TKT may thus impair the cell’s antioxidative defenses, leading to a buildup of ROS. Elevated ROS can contribute to oxidative stress, damage cellular components, and in some contexts, even promote cell death. – Many studies have observed that TKT is upregulated in various malignancies, including lung, breast, colon, and liver cancers. – Association with Aggressiveness: Elevated TKT expression is often correlated with higher proliferation rates, enhanced anabolic activity, and worse clinical outcomes in some cancer types. |
| Cyclooxygenase (COX)-2 overexpression has been noted in various cancers.
PI3Ks/AKT pathways are over-activated in several types of cancers. EGFR altered activity has been noted in various pathological conditions. However, its regulation is an important step in the inhibition of cancer. In this regard, EGCG shows a pivotal role in the inhibition of EGFR activity. Activating protein-1 transcription factor has been associated with pathogenesis including cancer. Activation of the sonic hedgehog (Shh) pathway is required for the growth of numerous tissues and organs and recent evidence indicates that this pathway is often recruited to stimulate growth of cancer stem cells (CSCs) and to orchestrate the reprogramming of cancer cells via epithelial mesenchymal transition (EMT). Increased expression of Nanog has been associated with the aggressive nature of certain cancers, highlighting its role in promoting cancer stem cell characteristics. The aberrant hedgehog (Hh)/GLI signaling pathway causes the formation and progression of a variety of tumors. The process of cell apoptosis is often accompanied by the destruction of mitochondrial transmembrane potential, which is widely regarded as one of the earliest events in the process of cell apoptosis. Human malignancies frequently exhibit mutations in the TGF-β pathway, and overactivation of this system is linked to tumor growth by promoting angiogenesis and inhibiting the innate and adaptive antitumor immune responses50. Several studies have demonstrated that high cyclin D1 expression was observed in cancers including breast, lung, prostate, lymph node and colorectal cancers [23–25]. The oncogene c-myc, which is frequently over-expressed in cancer cells, is involved in the transactivation of most of the glycolytic enzymes including lactate dehydrogenase A (LDHA) and the glucose transporter GLUT1 [51,52]. Thus, c-myc activation is a likely candidate to promote the enhanced glucose uptake and lactate release in the proliferating cancer cell. Vimentin is overexpressed in various epithelial cancers, including prostate cancer, gastrointestinal tumors, tumors of the central nervous system, breast cancer, malignant melanoma, and lung cancer. Vimentin’s overexpression in cancer correlates well with accelerated tumor growth, invasion, and poor prognosis; however, the role of vimentin in cancer progression remains obscure. Heat shock proteins (HSPs) are normally induced under environmental stress to serve as chaperones for maintenance of correct protein folding but they are often overexpressed in many cancers, including breast cancer. Since NQO1 is highly expressed in many solid tumors, including via upregulation of Nrf2, the design of compounds activated by NQO1 and NQO1-targeted drug delivery have been active areas of research. Since increased Nrf2 gene expression is one of the main mechanisms of cancer cells in resisting chemotherapeutic drugs and survival in oxidative conditions; finding compounds with the ability to suppress Nrf2 gene expression with minimum side effects can be considered an important strategy for increasing the sensitivity of cancer cells to chemotherapy. Overexpression of c-met stimulates proliferation, migration and invasion in various types of cancer including prostate cancer. Overexpression of TGFα and EGFR by many carcinomas correlates with the development of cancer metastasis, resistance to chemotherapy and poor prognosis. More than 50% of human cancers have a mutated nonfunctional p53. |
| 2332- | RES, | Resveratrol’s Anti-Cancer Effects through the Modulation of Tumor Glucose Metabolism |
| - | Review, | Var, | NA |
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