It has also been seen that metabolic phenotype of tumor cells changes to adapt to the prevailing local conditions. A convergence between phenotypic and metabolic state transitions that confers a survival advantage to cancer cells against clinically used drug combinations like taxanes and anthracyclines have also been reported while drug resistant cancer cells had increased activity of both the glycolytic and oxidative pathways and glucose flux through the pentose phosphate pathway (PPP). Some of the fatty acids have been linked to acquire resistance against some of the cancer drugs. Fatty acid synthase (FASN), a key complex catalyzing fatty acid synthesis has been found to be linked to acquired docetaxel, trastuzumab and adriamycin resistance in breast cancer. Similar resistance have been found with intrinsic gemcitabine and radiation resistance in pancreatic cancer. Glutaminolysis is linked to cisplatin resistance via the activation of mTORC1 signaling in gastric cancer.