Cell Hypoxia nonhuman 36 priority journal 36 Animals 34 Humans 34 article 32 controlled study 30 human 30 unclassified drug 30 hypoxia inducible factor 1alpha 28 hypoxia 26 Hypoxia-Inducible Factor 1, alpha Subunit 22 protein expression 22 animal cell 20 messenger RNA 20 protein function 18 signal transduction 18 Cell Line, Tumor 16 Signal Transduction 16 human cell 16 Cell Line 14 immunoglobulin enhancer binding protein 14 protein protein interaction 14 protein stability 14 DNA-Binding Proteins 12 Drosophila 12 Drosophila Proteins 12 Transcription Factors 12 in vivo study 12 reverse transcription polymerase chain reaction 12