10/21/2026
Aggressive lung cancers often resist standard treatments because of a genetic flaw where tumor cells duplicate a specific segment of their own DNA, known as chromosome 3q. While scientists have long recognized that this extra DNA fuels rapid tumor growth and spread, finding a way to target and shut down the genes inside this region has remained a major hurdle in cancer research.
A new study published in the Proceedings of the National Academy of Sciences by researchers at UTHealth Houston has uncovered the hidden mechanism behind these stubborn tumors. Led by Dr. Xiaochao Tan, the team found that the duplicated DNA causes cancer cells to mass-produce an enzyme called phospholipase D1. This enzyme hijacks the cell's internal post office, the Golgi apparatus, forcing it into overdrive so the tumor can continuously pump out growth-promoting signals into the surrounding tissue.
While this hyperactive shipping system helps the cancer thrive and spread, it also creates a fatal weakness because the tumor becomes completely addicted to it. To exploit this dependency, the researchers designed a targeted therapy that acts like a biological guided missile, locking onto a surface protein abundant on these lung cancer cells to deliver an enzyme-blocking drug directly inside the tumor. In preclinical models, this precise strike shut down the rogue shipping process and halted tumor growth, offering a promising new strategy for treating some of the most difficult lung cancers.
Citation details: Xiaochao Tan et al., PLD1-driven oncogenic secretion creates a therapeutic vulnerability in chromosome 3q–amplified NSCLC, Proceedings of the National Academy of Sciences (2026). DOI: 10.1073/pnas.2532484123