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The effects of splenectomy in murine models of ischemic stroke: a systematic review and meta-analysis.


ABSTRACT:

Background

The spleen, a substantial reservoir of non-differentiated monocytes, may play a crucial role in the pathophysiology of post-ischemic inflammation and influence outcomes after ischemic stroke.

Aim of the study

To analyze splenectomy as a preclinical intervention in murine models of ischemic stroke.

Methods

Following systematic searches of PubMed, Scopus and Web of Science, a qualitative synthesis of study characteristics was performed, and the effect of splenectomy estimated by a three-level random-effects meta-analysis of infarct volumes and a conventional two-level random-effects meta-analysis of neurological deficit scores.

Results

Database searches identified a total of 14 studies, 13 of which were used for meta-analysis. The ischemic lesion volumes were reduced in splenectomized animals compared to the control groups (difference in standardized mean differences: - 1.42; 95% CI [- 1.98, - 0.85]; 95% PI [- 2.03, - 0.80]; I2(2) = 19.04%; 95% CI [0.00%, 65.49%]; I2(3) = 47.24%; 95% CI [0.00%, 85.23%]) and neurological deficit scores were improved (- 1.20; 95% CI [- 2.20, - 0.20]; 95% PI [- 4.58, 2.18]; I2 = 77.5%; 95% CI [50.0%, 89.9%]). A subgroup analysis for infarct volumes showed that splenectomy performed prior to ischemia achieved a higher reduction of the ischemic lesion than when splenectomy was performed immediately prior or after stroke. Although the overall effect size of splenectomy could be classified as large, there was a significant presence of risks of bias, study heterogeneity, and a potential presence of publication bias.

Conclusion

Despite limitations related to heterogeneity, risks of bias, and potential publication bias, this meta-analysis points to the spleen and its functional cell populations as promising targets for the therapeutic modulation of post-stroke inflammation.

SUBMITTER: Sternak M 

PROVIDER: S-EPMC9508771 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature

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Publications

The effects of splenectomy in murine models of ischemic stroke: a systematic review and meta-analysis.

Sternak Marko M   Glasnović Anton A   Josić Paula P   Romić Dominik D   Gajović Srećko S  

Journal of neuroinflammation 20220923 1


<h4>Background</h4>The spleen, a substantial reservoir of non-differentiated monocytes, may play a crucial role in the pathophysiology of post-ischemic inflammation and influence outcomes after ischemic stroke.<h4>Aim of the study</h4>To analyze splenectomy as a preclinical intervention in murine models of ischemic stroke.<h4>Methods</h4>Following systematic searches of PubMed, Scopus and Web of Science, a qualitative synthesis of study characteristics was performed, and the effect of splenectom  ...[more]

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