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Cechinel-Zanchett CC, Bolda Mariano LN, Boeing T, da Costa JDC, Da Silva LM, Bastos JK, Cechinel-Filho V, de Souza P. Diuretic and Renal Protective Effect of Kaempferol 3- O-Alpha-l-rhamnoside (Afzelin) in Normotensive and Hypertensive Rats. JOURNAL OF NATURAL PRODUCTS 2020; 83:1980-1989. [PMID: 32453565 DOI: 10.1021/acs.jnatprod.0c00274] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Our previous study showed that kaempferitrin, the main flavonoid from Bauhinia forficata Link leaves, induces diuresis and saluresis when orally given to rats. Since afzelin (AFZ) and kaempferol (KFL) are active compounds from the biometabolism of kaempferitrin, the diuretic and renal protective properties of these two compounds were evaluated. While the acute treatment with AFZ evoked a diuretic action associated with an increase in Cl- excretion and a Ca2+-sparing effect, KFL did not present any activity. The pretreatment with a muscarinic receptor blocker or with an inhibitor of the cyclooxygenase fully avoided AFZ-induced diuresis. AFZ also induced a prolonged (7-day treatment) diuretic effect in normotensive (NTR) and hypertensive rats (SHR), with an increase of urinary Na+ and Cl- excretion, while it decreased the elimination of Ca2+. AFZ was able to decrease ROS and nitrite generation on kidney homogenates in comparison with the SHR group treated with the vehicle, as well as mitigated the changes in the renal corpuscle region (glomerulus and Bowman's capsule). Moreover, AFZ significantly reduced calcium oxalate crystal formation in urine, with inhibition rates of 41% for the NTR and 92% for the SHR group. Taken together, this study shows that AFZ exerts acute and prolonged diuretic effects plus protective renal properties.
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Affiliation(s)
- Camile Cecconi Cechinel-Zanchett
- Programa de Pós-graduação em Ciências Farmacêuticas, Núcleo de Investigações Químico-Farmacêuticas (NIQFAR), Universidade do Vale do Itajaí, UNIVALI, Itajaí, Santa Catarina, Brazil
| | - Luísa Nathália Bolda Mariano
- Programa de Pós-graduação em Ciências Farmacêuticas, Núcleo de Investigações Químico-Farmacêuticas (NIQFAR), Universidade do Vale do Itajaí, UNIVALI, Itajaí, Santa Catarina, Brazil
| | - Thaise Boeing
- Programa de Pós-graduação em Ciências Farmacêuticas, Núcleo de Investigações Químico-Farmacêuticas (NIQFAR), Universidade do Vale do Itajaí, UNIVALI, Itajaí, Santa Catarina, Brazil
| | - Juliana de Carvalho da Costa
- School of Pharmaceutical Sciences, University of Sao Paulo, Avenida do Café - CEP 14040-903 Ribeirão Preto, SP, Brazil
| | - Luísa Mota Da Silva
- Programa de Pós-graduação em Ciências Farmacêuticas, Núcleo de Investigações Químico-Farmacêuticas (NIQFAR), Universidade do Vale do Itajaí, UNIVALI, Itajaí, Santa Catarina, Brazil
| | - Jairo K Bastos
- School of Pharmaceutical Sciences, University of Sao Paulo, Avenida do Café - CEP 14040-903 Ribeirão Preto, SP, Brazil
| | - Valdir Cechinel-Filho
- Programa de Pós-graduação em Ciências Farmacêuticas, Núcleo de Investigações Químico-Farmacêuticas (NIQFAR), Universidade do Vale do Itajaí, UNIVALI, Itajaí, Santa Catarina, Brazil
| | - Priscila de Souza
- Programa de Pós-graduação em Ciências Farmacêuticas, Núcleo de Investigações Químico-Farmacêuticas (NIQFAR), Universidade do Vale do Itajaí, UNIVALI, Itajaí, Santa Catarina, Brazil
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