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Role of monocyte-derived macrophages in postoperative cognitive dysfunction induced by cardiopulmonary bypass in rats / 中华麻醉学杂志
Chinese Journal of Anesthesiology ; (12): 937-940, 2020.
Article in Chinese | WPRIM | ID: wpr-869971
ABSTRACT

Objective:

To evaluate the role of monocyte-derived macrophages (Mo-Mφ) in postoperative cognitive dysfunction (POCD) induced by cardiopulmonary bypass (CPB) in rats.

Methods:

Forty SPF healthy adult Sprague-Dawley rats, weighing 350-400 g, aged 11-12 weeks, were divided into 4 groups ( n = 10 each) using a random number table

method:

sham operation group (S group), CPB group (C group), CPB plus PBS liposome group (P group), and CPB plus clodronate liposome group (L group). In C, P, and L groups, CPB was performed for 60 min, the equal volume of normal saline, PBS liposomes 4 μl/g and clodronate liposomes 4 μl were injected via the tail vein at 48 and 24 h before CPB, respectively.Blood was collected from the saphenous vein before CPB for determination of the clearance rate of Mo-Mφ by flow cytometry.Cognitive function was assessed using the Morris water maze test at 7 days after CPB.Blood was collected from the abdominal aortic vein, and the levels of serum inflammatory factors (interleukin-6 [IL-6], tumor necrosis factor-alpha [TNF-α], and interleukin-1beta [IL-1β]) and brain injury markers (S100β protein and neuron-specific enolase [NSE]) were measured by enzyme-linked immunosorbent assay.

Results:

Compared with group S, the serum IL-1β, IL-6 and TNF-α concentrations were significantly increased, the serum S100β protein and NSE concentrations were increased, the escape latency was prolonged, and the number of crossing the platform was decreased in C, P, and L groups ( P<0.05). Compared with group C, the clearance rate of blood-derived monocytes was significantly decreased, the serum S100β concentrations were increased, the escape latency was prolonged, and the number of crossing the platform was decreased ( P<0.05), and no significant change was found the parameters mentioned above in group P ( P>0.05).

Conclusion:

Mo-Mφ infiltration is the endogenous protective mechanism of CPB-induced POCD in the rats.
Full text: Available Index: WPRIM (Western Pacific) Language: Chinese Journal: Chinese Journal of Anesthesiology Year: 2020 Type: Article

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Full text: Available Index: WPRIM (Western Pacific) Language: Chinese Journal: Chinese Journal of Anesthesiology Year: 2020 Type: Article