Assessment of Nephroprotective Potential of Ethanolic Extract Premna Tomentosa (Ept) in Alcohol Toxicity in Male Albino Rats

The nephroprotective prospective of Premna tomentosa extract against Alcohol induced nephrotoxicity in rats was investigated in the present study. The characterization of ethanol extract ofPremna tomentosa (EPT)was performed using standard phytochemical analysis. Male albinowistar rats 36 in numbers were divided into 6 groups including control, negative control, positive control and various doses of EPT Treated groups; Nephrotoxicity was induced by alcohol (1ml/100gm b.wt) in animals. Rats intoxicated with Alcohol were fed with 500, 750 mg/kg dose of EPT and Liv 52 (1ml/100gm b.wt) for 60 days. Results show that EPT (500mg/kgb.wt) had a signi icant effect against alcohol inducednephrotoxicity in rats thanEPT (750mg/kgb.wt) in bloodparameters and consonantly good histopathological changes in kidney. The deleterious histopathological alterations in kidney associated with glomerular and tubular changes in alcohol intoxicated rats was evident. This result shows Premna tomentosamay be used as supplementary drug for alcoholics.

The nephroprotective prospective of Premna tomentosa extract against Alcohol induced nephrotoxicity in rats was investigated in the present study. The characterization of ethanol extract of Premna tomentosa (EPT) was performed using standard phytochemical analysis. Male albino wistar rats 36 in numbers were divided into 6 groups including control, negative control, positive control and various doses of EPT Treated groups; Nephrotoxicity was induced by alcohol (1ml/100gm b.wt) in animals. Rats intoxicated with Alcohol were fed with 500, 750 mg/kg dose of EPT and Liv 52 (1ml/100gm b.wt) for 60 days. Results show that EPT (500mg/kg b.wt) had a signi icant effect against alcohol induced nephrotoxicity in rats than EPT (750mg/kg b.wt) in blood parameters and consonantly good histopathological changes in kidney. The deleterious histopathological alterations in kidney associated with glomerular and tubular changes in alcohol intoxicated rats was evident. This result shows Premna tomentosa may be used as supplementary drug for alcoholics.

INTRODUCTION
Alcohol prompted organ pathogenesis is due to the aggregation of toxic substances generated during alcohol metabolism (Mani et al., 2016), which in turn generates reactive oxygen species (ROS) and other free radicals (Moncada et al., 1994). It causes covalent alteration of cellular macro molecules, tissue damage and kidney dysfunction (Offor et al., 2019); (Mahmoud et al., 2015). Recent reports document that alcoholism remains a risk factor for post infectious glomerulonephritis, kidney graft failure acute kidney injury by initiating and promoting atherogenic risk factors, such as hyperuricemia, high blood pressure (Hebbani et al., 2015) and diabetes (Schaeffner and Ritz, 2012). Prevalence of renal disease is currently accretion at startling ratio (Adikwu and Bokolo, 2018). Acute renal injury happens when suddenly kidney loss the ability to excrete wastes, conserve electrolytes, concentrate urine and maintains luid balance (Komail and Babu, 2018). Use of herbal products and supplements has increased tremendously over the past 3 decades with more than 80% of the world's population relies on use of traditional herbal remedies for primary health care (Shanmugam et al., 2010). Premna tomentosa is a less known medicinal plant of high medicinal value (Narayan and Muthana, 1953). It is used to treat different diseases such as diarrhea, headache, fever, conjunctivitis, skin diseases epilepsy and is delineated to have antidiabeticc, antidiarrheal, anti microbial, antioxidant, antin lammatory (Alam et al., 1993), anthelmintic, antispasmodics (Banu et al., 2015) and immunomodulatory activities (Devi et al., 2003). Aqueous extract of premna tomentosa leaves has been extensively used for the treatment of splenomegaly (Devi et al., 2004). The water boiled with its leaf is used to treat human paralysis (Srinivas et al., 2005). Additional analysis has enunciated the attainable bene it of premna tomentosa in animal model of xenobiotic induced hepatotoxicity (Devi et al., 1998). Furthermore investigations have shown that it contains more of phyto chemical constituents which include alkaloids, terpenoids, lavonoids, steroids and phenolic compounds (Priyadarshini et al., 2019). The high medicinal value of premna tomentosa, our attentions were aroused to carry out this study to ind the protective effect of ethanolic leaf extract of premna tomentosa in alcohol induced nephrotoxicity in albino rats.

Plant Material
The leaves of Premna tomentosa were collected from in and around Salem, Tamilnadu

Preparation of Plant Extract
The leaves were washed and light shaded dry for two weeks, after which was powdered and stored. The dried powder was extracted sequentially by ethanolic in hot continuous percolation method using Soxhlet apparatus. The solvent from the extracts was recuperated under reduced pressure using a rotary evaporator. The obtained crude ethanolic extract was stored at -20 o c and is used for the experiments.

Animals
Study was carried out inaccordance with guide lines and protocol approved by Institutional Animal Ethics Committee of Swamy Vivekanandha College of Pharmacy, India (SVCP/IAEC/PhD/2/02/2018). 36 Wistar albino rats (male) each weighing 150-200 g was obtained and were maintained on a 12h light/dark cycle in a temperature regulated (24± 2 o c) room. The rats were fed with standard pellets diet and water add libitum throughout the experimental duration.

Experimental Design
The animals were divided into 6 groups (6 each) as follows; Group I: Control Rats (1ml/100gm normal saline, b.wt).
Group VI: Rats administered EPT (750mg/kg b.wt) along with 40% Alcohol 1ml/100g b.wt/day. The rats were feed using gavage method for 60 days. The blood samples were collected from retro orbital venous plexus and the serum is prepared through centrifuging at 10,000 rpm for 10 minutes at 30 o c. Total protein, Albumin, Globulin, Urea, Creatine and Blood urea nitrogen were analyzed.

Histological analysis
For histopathologic studies, kidney was excised from the rats, and ixed in a neutral buffered solution of 10% formalin for 24h. The tissues were later embedded in paraf in and were thinly sectioned (5 microns) with a microtome and stained with hematoxylin and eosin. These sections were examined under digital microscope.
Graph 1: Effect of EPT and alcohol on the serum proteins, albumin and globulin of control and experimental rats.

Statistical Analysis
Data were expressed in terms of Mean ± Standard Deviation (SD). One-way ANOVA followed by post hoc Duncan's multiple range test was used. The differences were considered signi icant at p<0.05 by using SPSS 21 software.

RESULTS AND DISCUSSION
Graph 1 shows the effect of EPT on the levels of serum proteins, albumin and globulin of the control and experimental rats. EPT alone (Group III) treated rats haven't shown any statistically signi icant (P <0.05) difference on levels of serum proteins as compared to that of control rats. However, signi icantly reduced levels of serum total proteins, albumin, and globulin was noticed in alcohol fed rats (Group II) as compared to the control rats, treated with EPT (Groups V and VI), the levels of serum proteins were elevated signi icantly as compared to the alcohol treated rats.  Table 1 shows the effect of EPT on renal function markers of control and experimental rats. EPT alone (Group III) fed rats haven't showed any statistically signi icant (P < 0.05) difference on levels of serum urea, BUN and creatinine when compared with that of control rats. The serum levels of urea, BUN and creatinine were remarkably increased (P <0.05) in rats treated with alcohol alone (Group II) as compared to control and EPT alone treated rats. Supplementation with EPT (Groups V and VI) showed signi icantly decreased levels of serum urea, BUN and creatinine as compared to alcohol treated rats.
Histopathological section of kidney tissue shows normal architecture of glomerulus and tubules in control rats (Group I). Alcohol treated rats (Group II) kidney array the hypercellularity with reduced Bowman's space in the glomerulus and periglomerular in lammatory in iltration Figure 1B when compared to the normal cellularity and intact glomerular space in control group rats Figure 1A. The EPT alone at the dose of 500 mg/kg b.wt explains the normoarchitecture of glomerulus and tubules Figure 1C. Alcohol treated rats with Liv 52 (1ml/100gm b.wt p.o) states that slight increase in Bowman's space and reduced in lammatory in iltration Figure 1D. Administration of 750 mg/kg b.wt. Glomeruli shows mild focal segmental mesangial hypercellularity, Interstitium shows colloidal cast and there are no changes in tubules Figure 1F.
Alcoholic rats treated with of 500 mg/kg b.wt. Dose of EPT revealed merely normo architecture of the glomerulus and tubules Figure 1E. Treated rats with Liv 52 (1ml/100gm b.wt) shows mear to the normoarchitecture but were comparatively in reduced form. Kidneys of rats fed with alcohol exhibit severe destructive changes in tubules, diffused cellular in iltration, and severe congestion of blood vessels. The rate of serum urea production exceeds the rate of clearance causes accumulation of serum urea which leads to nephrotoxicity (Alam et al., 2019). Hence, serum urea concentration is generally contemplated a more dependable kidney function prophecy than serum creatinine (Ravindra, 2010). Creatinine is a breakdown product of creatine and is removed from body by the kidneys. Increased urea and creatinine levels was considered as the sign of nephrotoxicity (Devi et al., 2016;Gutierrez et al., 2010) which is revealed in this study. Histopathological study reveals that EPT (500mg/kg) have nephroprotective potential on alcohol induced nephrotoxicity.

CONCLUSIONS
From the obtained results, it may be concluded that ethanol extract of Premna tomentosa manifests remarkable nephroprotective activity in alcohol induced nephrotoxicity in biochemical and also in attenuation of pathological changes in kidney tissues. It may due to the presence of therapeutic phyto constituents, antioxidant potential which reduces lipid peroxidation and oxidative stress.

Funding Support
The authors declare that they have no funding support for this study.