On one hand, p38 MAPK activates intrinsic apoptotic pathways such as bcl-2, bax, and caspase-3 and induces renal tubular epithelial cell apoptosis, which is the underlying cause of contrast-induced direct renal tubular toxicity.
Increased ROS and intracellular Ca2+ can induce upregulation of p38 and p-p38 MAPK expression [ 36] and subsequently activate intrinsic apoptotic pathways such as bcl-2, bax, and caspase-3 and result in renal tubular epithelial cell apoptosis, which is the underlying cause of contrast-induced direct renal tubular toxicity.
However, these models often cause "loss of contrast" effects in the restoration u [18, 19].
p38 MAPK activation via the reverse mode of NCX and VDC could also result in renal ET-1 overproduction, followed by renal vasoconstriction and renal ischemia, which is one of the underlying causes of contrast-induced renal hemodynamic abnormalities.
On the other hand, activated p38 MAPK also results in renal ET-1 overproduction, followed by renal vasoconstriction and renal ischemia, which is one of the underlying causes of contrast-induced renal hemodynamic abnormalities.
It is possible that the use of different mouse genetic backgrounds is the cause of these contrasting results.
Future controlled population studies might shed light on the underlying cause of the contrasting mutational patterns between different sites in CRt, and whether this is a common trait among Coxiella-like symbionts.
Hence, large γ values will be obtained, which will cause large increase of contrast, as expected.
Results with the M-mode approach suggest that conditions other than tricuspid insufficiency may cause the appearance of contrast within the inferior vena cava.
Table 1 Different causes of abnormal contrast flow, key imaging findings and solutions to obtain a diagnostic CTA Etiology of altered contrast flow Key imaging features Solution Access cannula and vein mismatch 1. Suboptimal target vessel opacification 2. Injection flow rate may be lower than planned 1.
