The phrase "attenuated levels of" is correct and usable in written English.
It can be used in contexts where you want to describe reduced or weakened amounts of something, often in scientific or technical discussions.
Example: "The study found that the drug resulted in attenuated levels of inflammation in the affected tissues."
Alternatives: "reduced levels of" or "diminished levels of".
Work et al. (2010) suggest several reasons why this would happen: under nitrogen deprivation, starchless mutants metabolise less acetate and have severely attenuated levels of photosynthetic O2 evolution compared to the WT.
All the life-span-extending herbs (SQDB, CIN and GS) also attenuated levels of H2O2 and enhanced small heat shock protein expression.
These results correlate well with the results in Figure 2 wherein a reduced but not completely attenuated levels of IFN-γ and IL-12p40 levels were obtained upon neutralizing either RANTES or IP-10 in BCG infected GM-CSF-DCs.
These changes were associated with reduced PARP cleavage and attenuated levels of cleaved caspases.
Treatment with teriflunomide also attenuated levels of spinal cord-infiltrating T cells (Fig. 3d), NK cells, macrophages, and neutrophils [ 81].
After 24 hours, the study authors obtained bronchoalveolar lavage fluid and found attenuated levels of inflammatory cells.
In addition to the direct actions of ecSOD in attenuating levels of O2−, indirect effects of attenuated O2− have been postulated to lead to an increase in nitric oxide (NO) bioavailability.
Given that pioglitazone has been shown to attenuate levels of cytokines that act through the CCR2 receptor, and several studies have shown that a deficiency in CCR2 signaling ameliorates the detrimental effects of influenza infection [24], [27], [28], we assessed whether blocking CCR2 signaling would lead to a better outcome in our smoke-exposed mice.
Moreover, G-CSF attenuates levels of the inflammatory cytokine IL-8, but does not modulate IL-6.
In a panel of cancer cell lines, Amgen 82 was shown to attenuate levels of S1P, as expected.
For example, phytic acid [ 64], which is found in food grains could attenuate levels of ROS and Aβ oligomers in transgenic mice, and moderately up-regulate the expression of the autophagy protein (beclin-1), Sirt1 and the AMPK pathway [ 65].
