Indeed, release of vasoactive or hormonal substances can only lead to downstream adaptation, but it is upstream adaptation that is required.
This leads to the accumulation of serotonin in the synaptic cleft, which in turn may cause adaptive changes in both serotonergic and noradrenergic neurotransmission and downstream neural adaptation, helping to alleviate the symptoms of depression (Hashimoto, 2009; Vidal et al., 2009).
Mechanistic studies Understanding whether the cellular and molecular basis of hypoxic adaptations (downstream targets of HIF-1α) differ between the various altitude-training interventions, and the impact of titrated 'hypoxic doses'.
The mechanisms that decipher the protein folding status and orchestrate a coordinated downstream response, either adaptation or apoptosis, are fundamentally significant, unknown, and require further investigation.
Finally, the observation of doublesex adaptation in both Drosophila and Tephritidae suggests that these changes are due to ongoing adaptation of downstream sex-specific regulation, rather than being associated the recruitment of Sex-lethal and the resulting change in the topology of the sex determining cascade.
HIF-1α can then bind to the beta subunit (HIF-1β) and induce the transcription of downstream targets that promote adaptation to a hypoxic environment18.
It has been well accepted that chemoattractant receptor occupancy difference across the cell length is a determining factor for cell gradient sensing and migration while the robustness of gradient sensing and chemotaxis in shallow chemoattractant gradients is enabled by downstream signal amplification and adaptation mechanisms [21].
Numerous studies have shown that the plant hormone abscisic acid (ABA) plays a crucial role in controlling downstream responses essential for adaptation to abiotic stress.
In fact, it is the entire spectrum of characteristics (e.g., metabolic and neuro-coordinative) of the upstream stimulus (resistance vs. endurance exercise; RE vs. E) that determines the downstream events necessary for training adaptations to occur.
