As part of these latter networks, upregulation of ASNS (asparagine synthetase) was evident, a notable observation as ALL-31R demonstrated acquired resistance to ASP, for which ASNS upregulation is a known mechanism of resistance.
Nevertheless, a recent report demonstrated acquired resistance to the BCL-2-specific mimetic ABT-199 in two different experimental lymphoma models; one was due to an inactivating mutation in BAX, whereas the other was a BCL-2 mutation that curiously ablated its inhibition by ABT-199 whilst maintaining anti-apoptotic activity (Fresquet et al, 2014).
It has seemed likely for a while that the result, which appeared to demonstrate acquired pluripotency via a simple process, isn't real.
Results indicate that many human cancers have intrinsic resistance and tumours initially sensitive to rapamycins become refractory, demonstrating acquired resistance.
Three unrelated and 'healthy', individuals demonstrate acquired genetic variants as a consequence of aging and the accumulation of variants occurs at different rates.
Two cell lines have been derived from sensitive MCF-7wtbreast cancer cells (IC 50 value < 0.001 μM) following long-term exposure to 10 nM or 10 μM CJM 126, MCF-710 μM 126 and MCF-710 μM 126respectively, which demonstrate acquired resistance to this agent (IC 50> 30 μM) and cross-resistance to DF 129, DF 203 and DF 229.
Following fear conditioning the latency of responses to predictive auditory stimuli decreases (Quirk et al., 1995; Maren, 2000) and the response amplitude increases selectively to predictive, but not non-predictive, stimuli (Collins and Pare, 2000), thus demonstrating acquired selectivity in responding to CS+ and CS− stimuli.
Studies in other countries demonstrated frequent acquired resistance of MRSH to fluoroquinolones isolated from humans as well [ 10, 14].
Furthermore, sequencing of the c-Met gene demonstrated that acquired resistance to SU11274 was not associated with mutations altering protein structure and activity.
6, 7 Despite high selectivity of action and proven initial clinical success of TKIs, several studies have demonstrated that acquired resistance to TKIs develops in many patients within a couple of years.
A lower ReHo may represent local intraregional reduced neuron activity or regular disorder [ 7], which can strongly affect the brain neurons involved in information processing, as demonstrated in acquired deafness [ 10] and severe depression [ 11].
