血浆中性粒细胞明胶酶相关脂质运载蛋白作为严重恶性疟原虫疟疾肾损伤的生物标志物及缺氧性脑损伤的潜在预测指标:来自印度的见解

Plasma Neutrophil Gelatinase-Associated Lipocalin as a Biomarker of Kidney Injury and Potential Predictor of Hypoxic Brain Injury in Severe Plasmodium falciparum Malaria: Insights From India.

作者信息

Olcott Flora, Bertran-Cobo Cesc, Sahu Praveen K, Maharana Sameer, Bage Jabamani, Mohanty Akshaya K, Hoffmann Angelika, Mohanty Sanjib, Wassmer Samuel C

机构信息

Department of Infection Biology, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, UK; Centre for Clinical Research in Infection and Sexual Health, University College London, London, UK.

Department of Infection Biology, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, UK; Department of Psychiatry and Mental Health, University of Cape Town, Cape Town, South Africa; Neuroscience Institute, University of Cape Town, Cape Town, South Africa.

出版信息

Semin Nephrol. 2025 May;45(3):151619. doi: 10.1016/j.semnephrol.2025.151619. Epub 2025 May 12.

Abstract

Severe malaria is associated with kidney and brain injury, yet potential mechanisms linking both complications remain understudied. We investigated the associations between kidney and brain injuries in a cohort of Indian adults and children with severe Plasmodium falciparum malaria. We found that acute kidney injury was prevalent in both adults (64.4%) and children (71.4%). We also found that plasma levels of the structural kidney injury biomarker neutrophil gelatinase-associated lipocalin (NGAL) were strongly associated with acute kidney injury severity (P < .0001) and negatively correlated with whole brain magnetic resonance imaging apparent diffusion coefficient values in cerebral malaria (r = -0.6, 95% confidence interval, -0.8 to -0.3). Low apparent diffusion coefficient values indicate cytotoxic edema, a form of hypoxic brain injury mediated by parasite sequestration and inflammation. Severe cytotoxic edema has been shown to be associated with increased mortality in severe malaria. In our cohort, there was a 5.5-fold greater risk of this form of brain injury (prevalence risk ratio, 5.5, 95% confidence interval, 2.3-13.2) in patients with high NGAL levels (>300 ng/mL). These results suggest that plasma NGAL may play a critical role in structural kidney injury and could serve as a predictive marker for hypoxic brain injury in the context of severe malaria.

摘要

重症疟疾与肾脏和脑损伤相关,但将这两种并发症联系起来的潜在机制仍未得到充分研究。我们在一组患有严重恶性疟原虫疟疾的印度成人和儿童中调查了肾脏和脑损伤之间的关联。我们发现急性肾损伤在成人(64.4%)和儿童(71.4%)中都很普遍。我们还发现,肾脏结构损伤生物标志物中性粒细胞明胶酶相关脂质运载蛋白(NGAL)的血浆水平与急性肾损伤严重程度密切相关(P <.0001),并且与脑型疟中全脑磁共振成像表观扩散系数值呈负相关(r = -0.6,95%置信区间,-0.8至-0.3)。低表观扩散系数值表明存在细胞毒性水肿,这是一种由寄生虫滞留和炎症介导的缺氧性脑损伤形式。严重的细胞毒性水肿已被证明与重症疟疾死亡率增加有关。在我们的队列中,NGAL水平高(>300 ng/mL)的患者发生这种脑损伤形式的风险高5.5倍(流行风险比,5.5,95%置信区间,2.3 - 13.2)。这些结果表明,血浆NGAL可能在肾脏结构损伤中起关键作用,并可作为重症疟疾背景下缺氧性脑损伤的预测标志物。

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