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Benefits of D-005, a Lipid Extract from Acrocomia Crispa Fruits, In Benefits of D-005, a lipid extract from Acrocomia crispa fruits, in the prevention of acute kidney injury induced by nephrotoxicity in rats Benefícios do D-005, um extrato lipídico de frutos da Acrocomia crispa, na prevenção de lesão renal aguda induzida por nefrotoxici- dade em ratos Authors ABSTRACT RESUMO 1,2 Sandra Rodríguez-Salgueiro Introduction: Aminoglycoside-induced Introdução: Lesão renal aguda induzida Leyanis Ocaña-Nápoles1 acute kidney injury (AKI) is a pathology por aminoglicosídeos é uma patologia Ambar Oyarzábal-Yera¹ closely linked to oxidative and inflammatory intimamente ligada a reações oxidativas Lucía González-Núñez ² reactions. Taking into account the previous e inflamatórias. Considerando efeitos Giselle Breña-Betancourt¹ reported antioxidant and anti-inflammatory antioxidantes e anti-inflamatórios relatados María Flavia Pérez-Pino¹ effects of D-005, a lipid extract obtained anteriormente do D-005, um extrato lipídico José A. Medina-Pírez¹ from Cuban palm Acrocomia crispa de frutos da palmeira cubana Acrocomia Sonia Jiménez-Despaigne¹ (Arecaceae) fruits, this work aimed to crispa (Arecaceae), este trabalho avaliou Vivian Molina-Cuevas¹ evaluate the effects of D-005 on kanamycin- efeitos do D-005 na LRA induzida por induced AKI. Methods: Male Wistar rats canamicina. Métodos: Dividiu-se ratos were divided into 7 groups: negative control Wistar machos em 7 grupos: controle negativo (veículo, Tween 65/H2O) e seis ¹Centro Nacional de Investigación (vehicle, Tween 65/H2O) and six groups Científica, Departamento de treated with kanamycin to induce AKI: grupos tratados com canamicina para Farmacología, Havana, Cuba. positive control (vehicle), D-005 (25, 100, induzir LRA: controle positivo (veículo), ²Facultad Latinoamericana de 200, and 400 mg/kg) and grape seed extract D-005 (25, 100, 200, 400 mg/kg) e extrato Medicina, Departamento de (GSE, 200 mg/kg). D-005, vehicle, and GSE de semente de uva (ESU, 200 mg/kg). D-005, Ciencias Morfológicas, Havana, oral treatments were administered once veículo, e tratamentos orais com ESU foram Cuba. administrados uma vez por dia durante sete daily for seven days, 1 h before kanamycin dias, 1 h antes da canamicina (500 mg/kg, (500 mg/kg, i.p.). Serum uric acid and i.p.). Avaliou-se concentrações séricas de urea concentrations, renal histopathology, ácido úrico e ureia, histopatologia renal e and oxidative markers (malondialdehyde marcadores oxidativos (malondialdeído (MDA), sulfhydryl (SH) groups, and catalase (MDA), grupos sulfidrila (SH), atividade (CAT) activity) were assessed. Results: de catalase (CAT)). Resultados: D-005 D-005 significantly reduced uric acid and reduziu significativamente níveis de ácido urea levels, starting from D-005 100 mg/ úrico e ureia, partindo de D-005 100 mg/ kg. Histopathologically, D-005, at all the kg. Histopatologicamente, D-005, em todas tested doses, protected renal parenchyma as doses testadas, protegeu estruturas do structures (glomeruli, proximal tubules, parênquima renal (glomérulos, túbulos and interstitium). These findings were proximais e interstício). Estes achados foram accompanied by a significant reduction of acompanhados por uma redução significativa MDA and SH group concentrations as well das concentrações de MDA e grupo SH, e pela as restoration of CAT activity. The highest restauração da atividade CAT. As maiores percentages of inhibition were obtained with porcentagens de inibição foram obtidas com the dose of 400 mg/kg. GSE, the reference a dose de 400 mg/kg. ESU, a substância substance, also prevented kanamycin- de referência, também evitou alterações induced biochemical and histopathological bioquímicas e histopatológicas induzidas changes, as well as reduced MDA and por canamicina, reduziu MDA e grupos SH groups and restored CAT activity. SH e restaurou atividade CAT. Conclusão: Submitted on: 03/01/2021. Conclusion: The administration of repeated A administração de doses orais repetidas de Approved on: 05/12/2021. oral doses of D-005 significantly protected D-005 protegeu significativamente contra against kanamycin-induced AKI, which LRA induzida por canamicina, que pode could be associated with the antioxidant and estar associada aos efeitos antioxidantes e Correspondence to: anti-inflammatory effects of this extract. anti-inflamatórios deste extrato. Sandra Rodríguez-Salgueiro. E-mail: [email protected] Keywords: Acrocomia crispa; Renal Descritores: Acrocomia crispa; Toxicidade DOI: https://doi.org/10.1590/2175- Toxicity; Aminoglycoside Antibiotics; Renal; Antibióticos Aminoglicosídeos; 8239-JBN-2021-0048 Oxidative Stress; Inflammation. Estresse oxidativo; Inflamação. 1 Benefits of D-005 on kanamycin-induced AKI INTRODUCTION AMG-induced AKI is fatal in some cases. However, patients can survive due to the regenerative capability Acute kidney injury (AKI) is a clinical syndrome of of tubular cells, which allows them to recover as varied etiology characterized by a sudden decrease in soon as AMG treatment is stopped6. However, even kidney function, accumulation of waste metabolites, though AKI may be reversible, some patients do not water-mineral imbalance, and systemic symptoms. completely recover and usually develop a chronic It is a common problem in intensive care medicine kidney disease7. since a moderate AKI increases the risk of death by Up to now, there is no effective therapeutic approximately five times1,2. alternative to prevent AMG renal toxicity in clinical Several drugs usually used in the clinical setting, practice and current treatments are not able to including aminoglycoside antibiotics (AMGs), prevent the progression of AKI towards chronic contribute to AKI due to their nephrotoxic side effects. kidney disease. In this context, it is necessary to search AKI induced by AMG treatment has a worldwide for new alternatives contributing to accelerate the incidence of 5 to 15 %, appearing 7 to 10 days regeneration of renal tubular cells and prevent AKI. after starting the administration of the AMG. The Diverse natural and synthetic substances have immediate clinical manifestations are: oliguria with displayed beneficial actions on AKI induced by AMGs. dysfunction of renal excretion and increased serum Antioxidant agents are among the best candidates due creatinine, urea, and other metabolic products3. to their efficacy in preventing the generation of reactive The accumulation of AMG in the tubular oxygen species8-10. According to this approach, extracts epithelium triggers the initial phase of AKI leading obtained from plants belonging to Arecaceae family, to a complex interrelation of vascular and tubular such as Cocos nucifera and Phoenix dactylifera, have processes causing kidney dysfunction. Tubular prevented gentamicin-induced AKI in rats11,12. toxicity by AMG is mainly characterized by several D-005, a saponified lipid extract obtained from pathological changes in tubular epithelial cells in the fruit of Acrocomia crispa, endemic palm of Cuba the proximal segment, associated with an important of the Arecaceae family, contains a reproducible inflammatory component followed by non-lethal mixture of fatty acids, mainly oleic, palmitic, lauric, functional alterations of key components involved in and myristic while palmitoleic, caprylic, capric, and 4,5 the transport of water and solutes . stearic acids are found in lower concentrations13,14. As a consequence of AMG-induced tubular cell Recently, D-005 has shown to prevent pathological damage, some epithelial cells detach leading to formation changes induced by kidney ischemia/reperfusion of casts, composed of cells and proteins, into tubular in rats, by diminishing serum concentrations of lumens. The casts obstruct tubular lumens, causing an creatinine, uric acid, and urea and lessening tubular increase in intratubular pressure, which reduces the histopathological changes in kidney cortex. This was excretory function of affected nephrons and elevates linked to D-005 antioxidant effects, since it decreased the hydrostatic pressure in the Bowman’s capsule, thus the concentrations of malondialdehyde (MDA) decreasing glomerular filtration rate. Furthermore, higher and sulfhydryl (SH) groups in plasma and kidney intratubular pressure promotes the leakage of filtrate homogenate, as well as it has restored catalase (CAT) into the interstitial space and peritubular capillaries and enzymatic activity in the kidney15. 4 lowers the excretion of the filtered products . In addition, previous studies revealed that D-005 Renal vasculature and glomerular filtration exerts anti-inflammatory effects in vitro and in vivo function are also affected by AMGs through by inhibiting the enzymes 5-lipooxygenase (5-LOX) stimulation of mesangial cell contraction, proliferation, and cyclooxygenase type 2 (COX-2) and preventing and apoptosis. These processes are mediated by inflammatory infiltration during acute lung damage the elevation of cytosolic calcium, oxidative stress, in mice16,17. inflammation, and vasoconstrictor release. Moreover, Taking into account the crucial role played reduced blood flow and glomerular filtration rate may by oxidative stress and inflammation in the contribute to aggravate AMG-induced tubular damage pathophysiology of AMG-induced AKI, as well as the by probably limiting the availability of oxygen and previous antioxidant and anti-inflammatory effects nutrients, and at the same time, facilitating oxidative of D-005, this work aimed to evaluate the effects of stress, similar to ischemic AKI4. D-005 on kanamycin-induced AKI. 2 Braz. J.
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