Mitigation of cisplatin induced nephrotoxicity by casticin in male albino rats

Mitigação da nefrotoxicidade induzida pela cisplatina pela casticina em ratos albinos machos

Abstract

Cisplatin (CP) is a commonly used, powerful antineoplastic drug, having numerous side effects. Casticin (CAS) is considered as a free radical scavenger and a potent antioxidant. The present research was planned to assess the curative potential of CAS on CP persuaded renal injury in male albino rats. Twenty four male albino rats were distributed into four equal groups. Group-1 was considered as a control group. Animals of Group-2 were injected with 5mg/kg of CP intraperitoneally. Group-3 was co-treated with CAS (50mg/kg) orally and injection of CP (5mg/kg). Group-4 was treated with CAS (50mg/kg) orally throughout the experiment. CP administration substantially reduced the activities of catalase (CAT), superoxide dismutase (SOD), peroxidase (POD), glutathione S-transferase (GST), glutathione reductase (GSR), glutathione (GSH) content while increased thiobarbituric acid reactive substances (TBARS), and hydrogen peroxide (H₂O₂) levels. Urea, urinary creatinine, urobilinogen, urinary proteins, kidney injury molecule-1 (KIM-1), and neutrophil gelatinase-associated lipocalin (NGAL) levels were substantially increased. In contrast, albumin and creatinine clearance was significantly reduced in CP treated group. The results demonstrated that CP significantly increased the inflammation indicators including nuclear factor kappa-B (NF-κB), tumor necrosis factor-α (TNF-α), Interleukin-1β (IL-1β), Interleukin-6 (IL-6) levels and cyclooxygenase-2 (COX-2) activity and histopathological damages. However, the administration of CAS displayed a palliative effect against CP-generated renal toxicity and recovered all parameters by bringing them to a normal level. These results revealed that the CAS is an effective compound having the curative potential to counter the CP-induced renal damage.

Keywords:  cisplatin; renal damage; casticin; curative potential

Resumo

A cisplatina (CP) é uma droga antineoplásica poderosa, comumente usada, com vários efeitos colaterais. Casticin (CAS) é considerado um eliminador de radicais livres e um potente antioxidante. A presente pesquisa foi planejada para avaliar o potencial curativo da CAS em lesão renal induzida por PC em ratos albinos machos. Vinte e quatro ratos albinos machos foram distribuídos em quatro grupos iguais. O Grupo 1 foi considerado grupo controle. Os animais do Grupo 2 foram injetados com 5 mg / kg de PB por via intraperitoneal. O Grupo 3 foi cotratado com CAS (50 mg / kg) por via oral e injeção de CP (5 mg / kg). O Grupo 4 foi tratado com CAS (50 mg / kg) por via oral durante todo o experimento. A administração de CP reduziu substancialmente as atividades de catalase (CAT), superóxido dismutase (SOD), peroxidase (POD), glutationa S-transferase (GST), glutationa redutase (GSR), glutationa (GSH), enquanto aumentou as substâncias reativas ao ácido tiobarbitúrico (TBARS) e níveis de peróxido de hidrogênio (H2O2). Os níveis de ureia, creatinina urinária, urobilinogênio, proteínas urinárias, molécula 1 de lesão renal (KIM-1) e lipocalina associada à gelatinase de neutrófilos (NGAL) aumentaram substancialmente. Em contraste, a albumina e a depuração da creatinina foram significativamente reduzidas no grupo tratado com PC. Os resultados demonstraram que a CP aumentou significativamente os indicadores de inflamação, incluindo fator nuclear kappa-B (NF-κB), fator de necrose tumoral-α (TNF-α), interleucina-1β (IL-1β), interleucina-6 (IL-6) níveis e atividade da ciclooxigenase-2 (COX-2) e danos histopatológicos. No entanto, a administração de CAS apresentou um efeito paliativo contra a toxicidade renal gerada por CP e recuperou todos os parâmetros, trazendo-os a um nível normal. Estes resultados revelaram que o CAS é um composto eficaz com potencial curativo para combater o dano renal induzido por CP.

Palavras-chave:  cisplatina; danos renais; casticin; potencial curativo

1. Introduction

Cisplatin (CP) is a chemotherapeutic medicine, used to cure many types of tumors efficiently such as ovarian, head, and neck tumor and testicular sarcoma (Terada et al., 2013). CP has become the most extensively used anticancer drug due to its therapeutic potential against cancer (Ijaz et al., 2020a). CP causes ROS generation and tubular inflammation, which lead to nephrotoxicity (Yang et al., 2015; Kumar et al., 2017). The main reason behind renal tubular damage is cisplatin-induced oxidative stress (Oh et al., 2017a; Saral et al., 2016). The reactive oxygen species (ROS) and reactive nitrogen species (RNS) changes the cellular structure and function (Pedraza-Chaverri et al., 2004; Divya et al., 2016). Though numerous mechanisms have been examined for nephrotoxicity caused by CP, including inflammation and oxidative stress, the precise mechanism has not yet been well understood (Malik et al., 2016).

Biotransformation and accumulation of CP play an important role in CP-induced renal dysfunction (Perazella, 2012; Tucker and Perazella, 2018). Since many years, efforts have been made to prepare CP derivatives with minimum side effects which lead to the formation of oxaliplatin and carboplatin with narrow therapeutic range (Kruger et al., 2015) The other available method to decrease the nephrotoxic effects of CP is extensive hydration to wash out CP from kidneys (Dasari and Bernard Tchounwou, 2014). Despite urinary excretion of CP followed by extensive hydration, the side effects of CP, especially nephrotoxicity, remain the main issue that limits the use and effectiveness of CP in cancer therapy (Pabla and Dong, 2008). One of the essential ways to decrease renal damage is the use of flavonoids which have proven to be a safer and effective strategy (Ali et al., 2007).

Plants are generally regarded as an active source of medicine (Regginato et al., 2021). Herbal medicines have become a major part of recent drug discoveries (Christen and Cuendet, 2012; Omar et al., 2020). Flavonoids are natural polyphenolics present in plants with diverse biological effects and play an essential part in detoxifying the free radicals (AlSharari et al., 2016). CAS, a natural flavonoid, is present in vegetables, spices, nuts, herbs, flowers, seeds, and stems (Miyahisa et al., 2006). CAS displays pharmacological and biological activities, i.e. anti-cancer, anti-inflammatory, and antioxidative activity (Lee et al., 2017). Therefore, the current research was planned to explore the curative ability of CAS against CP-persuaded nephrotoxicity in male albino rats.

2. Materials and Methods

2.1. Chemicals

CP and CAS were purchased from Sigma-Aldrich (Germany).

2.2. Animals

Twenty-four mature male albino rats weighing 170-200g were used in this experiment. Rats were placed in the vicinity of the animal house, University of Agriculture, Faisalabad. 25±1ºC temperature and 12 hrs. light/dark cycle was maintained in the experimental room. Cages of 54×39×21 cm size were used and 6 rats were kept in each cage. Moreover, rats were provided with tap water and standard food throughout the experiment. Before the start of the experiment, the animals were exposed to laboratory conditions for seven days. Animals were treated in compliance with the European Union of Animal Care and Experimentation (CEE Council 86/609) protocol.

2.3. Experimental design

Rats were divided into four groups, having 6 male rats in each and kept in different cages. The experiment was conducted for thirty days. Animals of Group-1 were given standard food throughout the experiment. Group-2 received a single injection of CP (10 mgkg^-1) intraperitoneally on the day first of the trial. Group-3 was administered with CP (10 mgkg^-1) injection on the first day of trial and CAS (50 mgkg^-1) orally daily till the completion of the trial. Doses were selected by following the Ijaz et al. (2020b). Rats of group-4 were administered with regular doses of CAS (50 mgkg^-1) orally once daily throughout the experiment. After thirty days of treatment, rats were given anesthesia, dissected and blood was collected for biological estimation of serum profile. After dissection both the kidneys were separated; one of them was packed in zipper bags and stored at -80⁰C for biochemical analysis. Another kidney was preserved in 10% neutral formalin buffer solution for histopathological examination.

2.4. Biochemical analysis

The kidney was stored at -80 °C and homogenized in 3ml of PBS (pH 7.4), then centrifuged at 12000 rpm for 15 minutes before analysis. CAT and POD activities were analyzed by following the method of Chance and Maehly (1955). The process of Kakkar et al. (1984) was followed to examine SOD activity. GST activity was evaluated according to the methodology of Habig et al. (1974). The procedure of Carlberg and Mannervik (1975) was used for the estimation of GSR activity while the GSH content was evaluated using the procedure of Jollow et al. (1974).

2.5. TBARS and hydrogen peroxide

H₂O₂ concentration was measured according to the procedure stated by Pick and Keisari (1981). TBARS analysis was performed by following the methodology of Iqbal et al. (1996).

2.6. Kidney function markers

Estimation of albumin, urea, urobilinogen, creatinine, urinary proteins, and creatinine clearance was completed by using standard diagnostic-kits, AMP diagnostic kit (AMEDA labor-diagnostic Gmbh, Austria). Urinary KIM-1 and Serum NGAL were determined according to the manufacturer’s command by using KIM-1 Quantikine ELISA Kit and NGAL Quantikine ELISA Kit (R and D Systems China Co. Ltd., Changning, China).

2.7. Inflammatory markers assessment

Commercially available kits were used to assess the inflammatory markers of the renal tissues. NF-κB, TNF-α, IL-6, IL-1β levels and COX-2 activity were determined with a rat ELISA kit (Shanghai YL Biotech Co. Ltd., China). Analyses were accomplished by following the manufacturer's instructions through ELISA Plate Reader (BioTek, Winooski, VT, USA).

2.8. Histopathological study

Kidney samples were preserved in 10% neutral formalin buffer solution for the fixation. Dehydration was performed with ascending grades of alcohol (80%, 90%, and 100%) and samples were transferred to cedarwood oil. After dehydration, tissues were embedded in paraplast and the blocks were prepared for microtomy. Thin slides of 3-4 mm were prepared by using a microtome and stained with Hematoxylin-eosin stain. Microphotography was conducted under a light microscope at 40X.

2.9. Statistical study

All numerical data collected from the experimental design were described in terms of Mean ± SEM. A comparison test was performed to check different groups using One-way ANOVA followed by Tukey’s test, and Minitab software was used. The level of significance (p< 0.05) was used.

3. Results

3. 1. Effect of CAS on antioxidant enzymes activity

The rats administered with CP displayed substantially (p<0.05) reduced antioxidant enzyme activities comprising CAT, SOD, POD, GST, GSR, and GSH content in contrast to the control group. Co-treatment of CP and CAS elevated the level of suppressed enzyme activities significantly (p<0.05). While only CAS treated rats displayed antioxidant enzymes activity almost near to the control group values (Table 1).

Table 1
Effects of casticin on the activity of CAT, SOD, POD, GSH, GSR, and GST in the kidneys of CP-treated rats.

Groups	CAT (U/mg protein)	SOD (nanomole)	POD (U/mg protein)	GST (mg/dl)	GSR (Nm NADPH oxidized/min/mg tissues)	GSH (nM/min/mg protein)
Control	6.49 ± 0.09 a	7.25 ± 0.06 a	5.64 ± 0.03 a	22.09 ± 0.62 a	2.94 ± 0.04 a	14.7 ± 0.38 a
CP (10 mg/kg)	2.45 ± 0.06 b	3.69 ± 0.09 b	1.90 ± 0.02 b	10.40 ± 0.31 b	0.97 ± 0.03 b	7.78 ± 0.27 b
CP (10 mg/kg) + CAS (50 mg/kg)	6.22 ± 0.04 a	6.91 ± 0.03 c	5.10 ± 0.01 a	20.49 ± 0.39 c	2.75 ± 0.02 a	13.7 ± 0.29 c
CAS (50 mg/kg)	6.47 ± 0.01 a	7.40 ± 0.01 a	5.61 ± 0.04 a	22.84 ± 0.14 a	3.06 ± 0.03 a	14.6 ± 0.19 a

• Values in a column having dissimilar superscripts are considerably (p<0.05) different from others.

3.2. Effect of CAS on TBARS (lipid peroxidation) and H₂O₂

TBARS and H₂O₂ levels significantly (p< 0.05) elevated in CP treated rats when compared to the control group, however rats received CP + CAS and CAS only did not show any remarkable difference in TBARS and H₂O₂ level in contrast to the control group (Table 2).

Table 2
Effects of casticin on the level of TBARS and H₂O₂ in the kidneys of CP-treated rats.

Groups	TBARS (nM/mg tissue)	H2O2 (µM/min/mg protein)
Control	15.36 ± 0.42 a	1.19 ± 0.09 a
CP (10 mg/kg)	24.89 ± 0.24 b	5.63 ± 0.07 b
CP (10 mg/kg) + CAS (50 mg/kg)	16.23 ± 0.21 c	1.93 ±0.05 a
CAS (50 mg/kg)	15.29 ± 0.19 a	1.24 ± 0.07 a

• Values in a column having dissimilar superscripts are considerably (p<0.05) different from others.

3.3. Effects of CAS on serum and urine profile

CP administration resulted in significant (p< 0.05) elevation in the levels of creatinine, urea, urobilinogen, urinary proteins, KIM-1, and NGAL. Simultaneously, there was a substantial (p< 0.05) decline in albumin and creatinine clearance in comparison to the control group. CAS + CP concurrent treated rats showed counter effect CAS over CP by diminishing the amount of creatinine, urea, urobilinogen, urinary proteins, KIM-1, and NGAL while improved the albumin level and creatinine clearance (Table 3).

Table 3
Effects of casticin on the serum and urine profile in the kidneys of CP-treated rats.

Groups	Control	CP (10 mg/kg)	CP (10 mg/kg) + CAS (50mg/kg)	CAS (50mg/kg)
Urea (mg/dl)	20.6 ± 0.35 a	66.7 ± 0.60 b	26.6 ± 0.32 c	21.7 ± 0.31 a
Creatinine (mg/dl)	1.94 ± 0.06 a	4.29 ± 0.13 b	2.21 ± 0.01 c	2.04 ± 0.04 a
Creatinine clearance (ml/min)	1.62 ± 0.06 a	0.92 ± 0.03 b	1.53 ± 0.01 c	1.57 ± 0.01 ac
Albumin (mg/dl)	8.07 ± 0.05 a	3.67 ± 0.04 b	7.91 ± 0.02 c	8.01 ± 0.04 ac
Urobilinogen (mg/dl)	3.66 ± 0.03 a	9.98 ± 0.03 b	4.05 ± 0.03 c	3.97 ± 0.02 a
Urinary proteins (mg/dl)	14.7 ± 0.22 a	33.6 ± 0.82 b	17.0 ± 0.08 c	15.3 ± 0.15 a
Urinary KIM-1 (mg/ml)	0.42 ± 0.01 a	2.22 ± 0.05 b	1.17 ± 0.05 c	0.44 ± 0.02 a
NGAL (ng/day)	0.83 ± 0.03 a	2.86 ± 0.06 b	1.66 ± 0.04 c	0.76 ± 0.04 a

• Values in a same row having dissimilar superscripts are considerably (p<0.05) different from others.

3.4. Effect of CAS on inflammatory markers

CP administration substantially (p˂0.05) raised the levels of inflammatory parameters NF-κB, TNF-α, IL-1β, IL-6, and COX-2 activities in CP treated rats compared to the control group. While CAS administration considerably (p<0.05) decreased the levels of these inflammatory parameters in the cotreated rats in contrast to the CP treated group (Table 4).

Table 4
Effects of CAS on inflammatory parameters (NF-κB, TNF-α, IL-1β, IL-6 levels and COX-2 activities) in the kidneys of CP-treated rats.

Groups	NF-κB (ng/g tissue)	TNF-α (ng/g tissue)	IL-1β (ng/g tissue)	IL-6 (ng/g tissue)	COX-2 (ng/g tissue)
Control	17.0 ± 0.83 a	6.26 ± 0.14 a	27.1 ±0.98 a	5.59 ± 0.08 a	23.9 ± 0.87 a
CP (10 mg/kg)	59.5 ± 1.17 b	14.4 ± 0.19 b	96.3 ±1.94 b	17.7 ± 0.45 b	68.1 ± 1.17 b
CP (10 mg/kg) + CAS (50 mg/kg)	29.6 ± 1.35 c	9.43 ± 0.16 c	39.8 ± 1.39 c	8.75 ± 0.07 c	38.1 ± 13.35 c
CAS (50 mg/kg)	16.5 ± 0.40 a	6.08 ± 0.06 a	26.05 ±1.20 a	5.54 ± 0.06 a	23.6 ± 0.40 a

• Values in a same column having dissimilar superscripts are considerably (p<0.05) different from others.

3.5. Effect of CAS on renal histology

Normal histology of renal tissue was detected in the control and CAS treated group. Both groups exhibited normal glomeruli with normal distal, and convoluted tubules and Bowman's capsule. Histopathological abnormalities were observed in the CP administered group. The malpighian body showed irregular damaged corticular segments and aggregation of necrotic cells. There was also an inflammatory cell's penetration in corticular and medullary sections, stuffing of blood vessels, stretching of tubules, and constriction of Bowman’s capsule space. CP and CAS co-administration reduced the renal damages with improved glomerular degradation and inflammatory cells infiltration and normal renal tissues like the non-treated group (Figure 1).

Figure 1
Histopathological examination of the different groups of renal tissues. (A) Renal section of control group rats, displaying normal histological structure of glomeruli and renal tubules; (B) Renal section of CP (10 mg/kg) administered rats, representing significant degenerative changes, granular deposits in their lumens and desquamation of the kidney epithelium; (C) A microphotograph of CAS (50 mg/kg) + CP (10 mg/kg) treated rats displaying reduced degenerative alterations in renal epithelium and renal tubules; (D) Renal section showing normal histological structure of glomeruli and renal tubules as in control rats treated with CAS (50 mg/kg) alone. BC; Bowman's capsule, RT; Renal tubule.

4. Discussion

CP is commonly used to treat the several types of tumors i.e., head and neck area, testis, liver, prostate, ovary, lung, and cervix tumors (Elsherbiny et al., 2016). Nearly 30% of patients experience renal toxicity, which is the most familiar side effect restricting cisplatin medications (Farooqui et al., 2017). Some studies have indicated that ROS and immune responses are prominent mediators of CP-induced nephrotoxicity (Abdellatief et al., 2017). Plants and herbs are naturally occurring sources having a long history of medicinal value. The extraction of modern-day drugs from natural products, generally from plant origin (Afsar et al., 2016). Casticin is considered as one of the major compounds extracted from herbs (Vetrix and Viticis Fructus), and Asian countries have been using it as traditional medicine extensively since old times (Mali and Dhake, 2011).

In this experiment, a remarkable decline was observed in antioxidant enzyme activities, including CAT, SOD, POD, GSH, GSR, and GST content. CAT substantially converts the H₂O₂ into H₂O and O₂ and protects the cells from the oxidative damage caused by H₂O₂ and OH^- (Aitken and Roman, 2008). SOD supports the conversion of O^-2 into hydrogen peroxide and oxygen (Liochev and Fridovich, 2010). GSR oxidizes the glutathione disulfide by transforming it into reduced glutathione (Kaneko et al., 2002). Glutathione (GSH) protects mammalian cells against oxidative stress by minimizing levels of H₂O₂ as well as other peroxides (Deponte, 2013). GST is a multifunctional enzyme, involved in detoxification processes due to catalytic conjugation of glutathione present in it with a large number of electrophilic toxins (Tirmenstein and Reed, 1989). CP produces reactive oxygen species, containing hydroxyl radicals (OH^-) and superoxide anion (O_2-), and triggers renal LPO (Mukhopadhyay et al., 2012). Earlier studies have detected the renal oxidative damage indicators, for example, escalated MDA and reduced antioxidant levels in renal tissues (Ma et al., 2017). CAS improves the damage by bringing the activities of antioxidant enzymes at normal levels. CAS possesses antioxidant properties as it is beneficial in reducing the ROS levels by raising antioxidant enzymes level (Eki̇nci̇-Akdemi̇r et al., 2018; Ijaz et al., 2020b).

The elevated level of TBARS and H₂O₂ showed a damaging effect in the kidney of animals administered with CP. It has been documented by other authors that, CP persuades free radicals and produces lipid peroxidation and oxidative stress in the kidney (Sahu et al., 2011). CP produces highly reactive free radicals including hydroxyl and superoxide radicals that can directly interact and alter numerous components such as lipids, proteins, and other molecules and ultimately causes the death of the cell (Satoh et al., 2003). While the group received CAS and co-treatment exhibited a reduction in TBARS and H₂O₂ level. CAS administration restored the H₂O₂ and TBARS towards normal values by attenuating the production of free radicals and these results are also supported by some other investigations (Ijaz et al., 2020a) in which the CAS recovered the levels of these parameters in hepatic cells of a rat.

The concentration of serum urea urobilinogen, urinary proteins, and creatinine was significantly increased in rats treated with CP. Urine does not contain urobilinogen as a component in normal conditions (Sahreen et al., 2015); therefore, its higher level in urine indicates the abnormality of the kidney. According to Farooqui et al. (2017), CP caused renal toxicity, reduced kidney function markers, and lead towards increased concentration of blood urea and serum creatinine. Increased creatinine and urinary proteins level and reduced level of creatinine clearance and albumin are the markers for acute oxidative damage in the renal tissues (Khan et al., 2010). CAS administration normalized the concentration of these markers by diminishing ROS production and reduced renal injuries which may be due to its antioxidant potential.

CP treatment raised the levels of KIM-1 and NGAL in treated rats. It has been reported that KIM-1 and NGAL are the biomarkers of acute kidney injury (AKI) (Lei et al., 2018). KIM-1 is a transmembrane protein and universally accepted marker for the initial diagnosis of AKI (Khan et al., 2012). In the healthy renal tissue, it is not expressed (Aydin et al., 2011); however, it is expressed during the early stages of nephrotoxicity at lower to higher levels (Luo et al., 2016). It is also interrelated with the acuteness of renal damage. It has protein-hydrolytic zones that help to detect its urine presence (Lei et al., 2018). NGAL is a modern parameter and is freshly recognized as a member of the lipocalin family (Shin et al., 2009). NGAL is a cytosolic protein present in the blood, urine, renal, and proximal-distal tubules in the situation of nephrotoxic injury and renal ischemia (Mori et al., 2005). NGAL is expressed in the damaged glomerulus and can affect epithelial regeneration. It is normally discharged into the blood in greater extents after damage and evacuated through the urine (Ross and Kasum, 2002). CP is a cytotoxic agent which may disrupt the integrity of renal cells, that leads to increased levels of KIM-1 and NGAL. Our results are in line with previous findings by Abdelsalam et al. (2018) and Faig et al. (2018), who observed the substantial elevation in renal KIM-1 and NGAL levels in cisplatin-induced renal damage. Another study also reported the increase in NGAL and KIM-1 one day after a 10μM dose of CP (Oh et al., 2017b). CAS treatment decreased the levels of KIM-1 and NGAL in cotreated rats, which confirmed that CAS treatment recovered the renal injuries. Due to the mitigation of the damaged kidney tissues, the level of KIM-1 and NGAL substantially decreased in CAS treated rats.

Inflammation plays a pivotal role in CP associated with renal damage. In this study, CP treatment elevated the levels of NF-κB, TNF-α, IL-6, IL-1β, and COX-2 activities. NF-κB activation is elemental in the expression of pro-inflammatory cytokines like NF-κB, TNF-α, IL-1β, IL-6, and COX-2 that are linked with acute inflammatory responses and other ROS related disorders (Kandemir et al., 2018). NF-kB activation leads to increased secretion of TNF-α, IL-1β, IL-6 through gene upregulation, which contributes to acute kidney injury and progression (Lee et al., 2006; Ramesh et al., 2007). COX-2 is an inductive form of COX and an additional critical inflammation marker, which plays an important biological role in inflammation (Subbaramaiah and Dannenberg, 2003). In this analysis, the activity of COX-2 was intensified in renal tissues of CP treated groups which indicates the renal damage in CP treated rats. CAS treated rats showed decreased levels of NF-κB, IL-1β, TNF-α, IL-6, and COX-2 activities. This normalization may be attributed to the anti-inflammatory potential of CAS. These results solidify the anti-inflammatory role of CAS in renal tissues.

Histopathological abnormalities were observed in the CP administered group. The malpighian body showed irregular damaged corticular segments and aggregation of necrotic cells. There was also an inflammatory cell's penetration in corticular and medullary sections, stuffing of blood vessels, stretching of tubules, and constriction of Bowman’s capsule space. CP-induced pathophysiological activity on the kidneys is exerted by inflammation, oxidative stress, and vasoconstriction of the renal vascular system as a result of necrosis in proximal tubule cells (Huang et al., 2017). In a previous study, tubular cell death has been reported as the principal underlying histopathological trait of renal toxicity (Oh et al., 2014). CAS attenuated the abnormalities in renal tissues and tubules in the cotreated group. These findings confirmed the anti-inflammatory and anti-oxidant action of CAS at the tissue level. This observation revealed that the therapeutic potential of CAS may be attributed to its antioxidant and anti-inflammatory properties which eventually attenuated renal tissue damages.

5. Conclusion

Our research showed the therapeutic capability of CAS against CP induced renal damage. The results of our investigation showed that CAS imparted a remarkable defensive role against oxidative stress and inflammation, which are a principal representative of CP-induced renal damage. CAS administration effectively mitigated the disturbance in the level of antioxidants, serum and urinary markers, inflammatory markers, and histopathological damages. This renoprotective ability of CAS is linked with its anti-oxidant, ROS scavenging, and anti-inflammatory abilities.

Acknowledgements

The authors (SM and KAG) express their sincere appreciation to the Researchers Supporting Project Number (2021/93) King Saud University, Riyadh, Saudi Arabia”.

• The authors (SM and KAG) express their sincere appreciation to the Researchers Supporting Project Number (2021/93) King Saud University, Riyadh, Saudi Arabia”.

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Publication Dates

• Publication in this collection
  27 Aug 2021
• Date of issue
  2023

History

• Received
  10 Sept 2020
• Accepted
  08 Mar 2021