INTRODUCTION:

Plant and creature materials have been utilized effectively for the administration and treatment of different sicknesses since old occasions. Many sound nations on the planet has recorded different indigenous natural cures as indicated by the infections and human prerequisites. Ayurveda is a comprehensive treatment and is utilized for location and treatments utilized in cleanliness, revive and to keep up the sound life is utilized in India from numerous decades prior. Diabetes mellitus (DM) is a metabolic disorders, which is characterized hypergycemia (high blood glucose). It is characterized by hyperglycaemia (fasting plasma glucose ˃7.0mmol/l, or plasma glucose ˃11.1mmol/l 2 hours after a meal) - caused by insulin deficiency, glycosuria, hyperlipidaemia, negative balance of nitrogen and ketonaemia.

Hyperglycaemia happens because of abundance glucose yield from hepatic cells and decrease in take -up and use of glucose by body muscle with decrease in glycogen creation. Hyperglycaemia happens because of abundance glucose yield from hepatic cells and decrease in take -up and use of glucose by body muscle with decrease in glycogen creation. At the point when the renal degree of reabsorption of glucose is expanded, glucose separates into urine (glycosuria) and this produces osmotic diuresis otherwise called (polyuria), which, thus, brings about lack of hydration, thirst and expanded drinking (polydipsia). Insulin insufficiency causes squandering through expanded breakdown and diminished amalgamation of proteins^1,2.

Nanoparticles: Nanoparticles are effective conveyance frameworks for the conveyance of equally hydrophilic and lipophilic medications. Nanoparticles are the submicron measured particles, going 10–1000mm. The significant objective behind structuring nanoparticle as a conveyance course of action is to control molecule size, surface properties, and arrival of pharmacologically dynamic operators so as to accomplish the site explicit activity of the medication at the restoratively ideal rate and portion regimen as of late, biodegradable polymeric nanoparticles are extensive consideration as potential medication conveyance devices. The nanospheres have a lattice type structure in which the dynamic fixing is scattered throughout (the atoms), though the nanocapsules have a polymeric film and a functioning fixing center. Nanonization has numerous points of interest, for example, expanding compound dissolvability, diminishing restorative dosages, and improving the retentiveness of home grown meds contrasted and the particular rough medications preparations^3,4.

Aegle marmelos:

Plant belongs to family Rutaceae. Commonly known as bael. Commonly used parts of this lodge are root, bark, seeds, and leaves. In present work we utilized leaves of Aegle marmelos which contains Skimmaianine, Aeglin, Rutin, γ-sitosterole, β-sitosterole, Flavone, Lupeol, Cineol, citral, Glycoside, o-isopentenyl, Hallordiol, Mameline, Citronellal, Cuuminauldehyde phenyliethyle cinnamides, Euginol, Marmesin, Aegelin, Glycoside.

MATERIAL AND METHODS:

Collection and authentication of plant leaves:

Aegle marmelos was collected from Agriculture college, Indore. Petroleum ether, ethyl acetate, chloroform, methanol, ethanol, Glyceryl monostearate was purchased from S.K. Chemicals, Indore. All solvents were analytical grade. Identification and authentication was confirmed by Department of Botany, Holkar Science College, Indore by correlating their morphological and microscopic characters with already mentioned in literature. The leaves were collected, cleaned well to get rid of all dirt and were shed dried, powdered and stored in airtight container with proper labelling for further use.

Preparation of extracts:

The coarsely powdered, dried plant parts (50g) were extricated with 300mL - 500mL oil ether by hot extraction procedure (soxhlet) for 4 hours. After finish of extraction the dissolvable was expelled by refining and amassed in vacuo. The marc gone after oil ether extraction was dried and extricated with 300mL - 500 mL chloroform by hot extraction process (soxhlet) for 4 hours. After finish of extraction the dissolvable was evacuated by refining and packed in vacuo. Likewise extraction was performed with other solvents. Then extracts were used for phytochemical screening⁵.

Isolation, identification of rutin from Aegle marmelos:

Ethyl acetate derivation part demonstrated positive test for nearness of flavonoids. It was broken down in least amount of methanol and included at a stretch to silica gel section arranged in ethyl acetic acid derivation. The section was eluted with ethyl acetic acid derivation pursued by reviewed blends of ethyl acetic acid derivation and methanol (10-90%) lastly just with methanol. Each time 100ml of elute was gathered and focused. At that point it was blended in with 25ml H2O, and extricated with oil ether (50ml x 3), trailed by chloroform (50ml x 3). After extraction, the fluid layer was gathered and left to represent 72 hours; a yellow hasten isolated out of the arrangement. The hasten was sifted and washed with a mix of chloroform: ethyl acetic acid derivation: ethanol (50:25:25). The un-broke up a piece of the hasten was broken down in hot methanol and separated, the filtrate was vanished to dryness to yield 10mg yellow powder and subjected to investigation. Rutin was confirmed by analytical techniques, HPLC, FTIR, HPTLC.

Isolated rutin showed a melting point at 241°C which was in agreement with the standard range of 240-242°C, as reported.

The Rf standards of isolated rutin and standard in numerous mobile phases was determined.

HPLC analysis:

The isolated moiety was distinguished by HPLC strategy and contrasted and standard of the equivalent, by utilizing section and a blend of methanol: water (1:1 proportion) as a portable stage with a stream pace of 1 ml min^-1 and identified at 360nm. The compound (in ethanol) was sifted through layer channel (Millipore, USA) and were infused (10μL) through the Sunfire – C18 section segment (5µm, 250 X 4.6mm) at segment temperature 25˚C. The versatile stage made out of methanol, and water (1:1) was eluted at a stream pace of 1mL/min and the profluent was checked at 280nm by UV-PDA indicator. The pinnacles were identified and contrasted and the standard.

Figure 1: HPLC spectra of isolated rutin

HPTLC: Instrument Specification of HPLC: Waters model No: 2998 manual injector.

Chromatographic Condition:

Test plate: HPTLC pre-covered plates (25 TLC Aluminum sheets), silica gel 60 254 (Merck KgaA, 64271 Darmstadt, Germany)

Solvent system: Ethyl acetic acid derivation: frosty acidic corrosive: formic corrosive: water (10:1.1:1.1:2.5 v/v/v/v) Wavelength: 366nm

Figure 2: HPTLC fingerprint profile of isolated rutin

Acute toxicity study:

Every single one experiments were in harmony with ethical procedure for investigations of investigational plant in conscious animals. Research protocol was approved by the Institutional Animal Ethics Committee. The acute toxicity study is use to set up the remedial file, for example the proportion between the pharmacologically powerful portion and deadly portion on a similar strain and ^{animal
varieties (LD}50^/ED50^{). More noteworthy is the record;
more secure is the compound}and the other way around. The intense poisonous quality examination was finished by OECD (Organization of Economic Co-activity and Development) rules 425-Fixed Dose Procedure (FDP).

Table 1: Result of acute toxicity study of rutin

Group	No. of animals used	Treatment or dose (mg/kg b.w.)	No. of animals recovered after study
Group	No. of animals used	Treatment or dose (mg/kg b.w.)	24 hrs.	72 hr.	14 days
Group A	5	2000	5	4	4
Group B	5	2000	5	5	4

Antidiabetic activity:

Nicotinamide solution: Nicotinamide arrangement was newly arranged by dissolving 480 mg of nicotinamide in 8 ml of 0.9 % NaCl arrangement, and the volume of the arrangement was made upto 10 ml with a similar arrangement. Streptozotocin solution: 14.9 gm of trisodium citrate was broken up in adequate refined water to deliver 1000 ml and the important pH (4.5) was balanced with Concentrated HCl.

Planning of 0.1 M citrate support arrangement pH 4.5: An answer of STZ was set up by dissolving the gauged amount of streptozotocin in 0.1 M crisply arranged super cold citrate cushion (pH 4.5) arrangement. The arrangement of STZ so arranged was regulated in the volume of 0.5-1ml.

The chose creatures were fasted medium-term and directed with Nicotinamide 120 mg/kg i.p course and following 15 minutes, Streptozotocin 60 mg/kg IP. Fasting glucose levels were resolved on twelfth day after acceptance to affirm stable hyperglycemia^6,7.

Oral glucose tolerance test:

Animals were isolated in nine gatherings and each gathering comprised of six rodents. Medium-term fasted rodents were utilized for study.

Group I: Normal control rodents managed saline (0.9% w/v);

Group II: Diabetic rodents managed standard medication Glibenclamide (2.5 mg/kg) every day

Group III: Diabetic rodents regulated test (50 mg/kg);

Group IV: Diabetic rodents regulated test (100 mg/kg);

Water and ethanolic separates were regulated orally to all medium-term fasted creatures. After 30 min. extricate organization, the glucose (4gm/kg) was controlled orally to all gatherings. The blood tests were gathered from the orbital plexus of every creature at 0 min, 30 min, 60 min and 120 min after glucose stacking.

FBS (Fasting blood glucose level):

The fasting blood glucose level was resolved utilizing a glucose oxidase-peroxidase receptive strips and a glucometer. In which lipid profile, liver glycogen content was determined, animals sacrificed by decapitation and the livers were excised out and glycogen content was estimated. (Table-3)

Assessment of changes in body weight:

The changes in the body weight were calculated by checking the weight of individual animals on 0^th, 5^th, 10^th and 15^th day.

Table 4: Effect of Rutin on body weight changes in rats.

S. No.	Treatment n=6	Fasting blood glucose level (mg/dl)
S. No.	Treatment n=6	0^th Day	5^th Day	10^th Day	15^th Day
1	Normal	154.65±3.66	156.01±2.76*	157.67± 3.27*	158.33 ± 2.74*
2	Diabetic control	147.67± 5.86	139.67± 6.07	126.11 ± 6.94	112.33 ± 6.56
3	Standard (Glibenclamide 2.5mg/kg)	144.33±4.10	141.03±4.36	137.67 ± 4.15	140.67 ± 4.52*
4	Rutin (50mg/kg)	141.06±9.94	136.05±9.94	129.06 ± 9.66	125.67 ± 9.81*
5	Rutin (100mg/kg)	144.67±6.29	141.33±6.21	139.31 ± 6.74*	132.33 ± 6.48*

Values expressed as mean ± S. E. M.; n = no. of animals in each group. * p < 0.05 significant Vs diabetic control. One-way ANOVA followed by Dunnet t test

Preparation of Nanoparticulate system:

Solid lipid nanoparticles were optimized on the basis of % entrapment, drug content, stirring time and no. of particles formed. Optimized formula used for further work. Solvent diffusion method has been used in which Glyceryl monostearate was dissolved in acetone and ethanol (1:1 v/v) in water bath at 60ºC and this was added to aqueous phase (distilled water) under mechanical agitation for 45 minutes. This was subjected to centrifugation at 4000 rpm for 10 minutes. Resuspended in water which results in formation of solid particles. Finally the nanoparticles were collected by filtration and are washed with demineralized water^8,9.

Characterization of Nanoparticulate system:

Particle Size and Shape: SLN were visualized under Philips Morgani 268 Transmission Electron Microscope. A drop of the different formulations was placed on different carbon coated copper grids to leave a thin film on the grids. Then, the layer was pessimistically stained with 1% phosphotungastic acid (PTA) by insertion a drop of the mark solution on to the film and the excess of the solution was drained off with a filter paper. The lattice was endorsed to dry thoroughly and formulations were viewed under a transmission electron microscope and photographs were taken at suitable magnification^10,
11.

Figure 3: TEM photomicrograph of rutin nanoparticles

Figure 4: SEM photomicrograph of rutin nanoparticles

Particle size and distribution:

The size and size distribution of particles was determined using laser diffraction particle size analyzer (Cilas, 1064 L, France). The particulate suspension was dispersed in distilled water and then it was put into the sample chamber of particle size analyzer and measurement of particle size was carried out (Table No. 5)¹².

Table 5: Optimization of GMS: Drug ratio

S. No.	Formulation code	GMS:rutin ratio	Average particle size (nm)	% Entrapment	No. of particles per mm³X1000
	NPL-1	9:1	2.23±0.35	64.4±1.2	27±2.5
2	NPL-2	8:2	2.34±0.89	68.8±0.98	28±2.2
3	NPL-3*	7:3	2.69±0.65	70.5±1.10	36±1.9
4	NPL-4	6:4	2.75±0.18	65.4±1.43	28±1.6
5	NPL-5	5:5	2.77±0.18	64.6±1.43	25±1.4

*Data are shown as mean SD (n= 3)

Entrapment Efficiency:

1g sephadex G-75 was allowed to swell in 10ml of 0.9% NaCl solution in distilled water in a glass screw capped bottle for 5hours at room temperature. The hydrated gel was filled to the top in the barrel of 1ml disposable syringe plugged with whatman filter pad. The barrel was then placed in the centrifuge tubes. The tubes were centrifuged at 2000rpm for 3 minutes to remove excess saline solution. Eluted saline was removed from the centrifuge tubes and exactly 0.2ml of suspension (undiluted) was applied dropwise on the top of the gel bed in the center. Columns were again centrifuged at 2000rpm for 3 minutes to expel and remove void volume containing nanoparticles in to the centrifuge tubes. Elute was removed and 0.25ml saline was applied to each column, and centrifuged as previously. The amount of drug entrapped in the particles was then determined by disrupting the particles followed by filtration and subsequent determination of the drug content using spectrophotometric method (Table No. 5)¹³.

In-vitro drug release:

1ml of pure suspension was placed in dialysis tube, which in turn was placed in a beaker containing 20ml of PBS (7.4 pH). The solution containing the dialysis tube was stirred on a magnetic stirrer while keeping the temperature constant at 37±1°C throughout the study. Samples were withdrawn at different time intervals with subsequent analyzed for drug using Shimadzu 1601 UV spectrophotometer at 359nm¹⁴.

Figure 5: In-vitro drug release of rutin nanoparticles

RESULTS AND DISCUSSION:

Isolated Rutin from Aegle marmelos leaves was verified by Rf value 0.38 (TLC) and spectrophotometrically shown by spectra (UV spectrophotometer, IR and HPLC). Rutin shows effective decrease in blood glucose level as compared the standard glibenclamide drug which is tested by animal studies. Acute toxicity of alcoholic and aqueous extract was performed after 14 days 4 animals recovered by 5. Results of OGTT of rutin 100mg/kg after 2hrs. gives 94mg/dl. Dose was optimized and then nanoparticles was prepared by optimizing the formula and process, formulation NPL-3 (7:3) shows average size 2.69µm with % entrapment of 70.5±1.10% was selected for further experiment. Drug release pattern performed and after different time interval drug release pattern continuously increased in sustained manner. Release also altered with the solid lipid nanoparticles prepared by solvent diffusion method; shows improved drug release profile. In-vitro drug release studies shows that drug release controlled over prolong period of time i.e. after 24hrs. 45.7% drug was released; this will also decrease the dosing frequency of active constituent.

Statistical analysis of data:

The data were analysed using Microsoft Excel and reported as mean ± SEM of triplicate determination.

CONCLUSIONS:

After development of solid lipid nanoparticles containing rutin shows effective management of diabetes in animals and release also modified because of carrier system which results in zero order drug delivery in body. We used drug of herbal origin which is again a benefit to get rid of continuous use of synthetic drugs daily, which ultimately gives side effects on body.

ACKNOWLEDGEMENTS:

We want to acknowledge Holkar Science College, Indore or plant material identification, Punjab University for SEM and TEM.

CONFLICT OF INTEREST:

The authors declare no conflict of interest.

REFERENCES:

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Received on 14.12.2019 Modified on 19.07.2021

Research J. Pharm. and Tech 2023; 16(5):2311-2316.

DOI: 10.52711/0974-360X.2023.00380

S. No.	Treatment n=6	Fasting blood glucose level (mg/dl)
S. No.	Treatment n=6	0 min	30 min	60 min	120 min
1	Normal	91.42± 0.92	132.33± 1.12	117.29± 1.11	111.03± 1.17
2	Standard (Glibenclamide 2.5mg/kg)	94.01± 0.73	110.33±0.56*	83.09 ± 0.97*	79.39± 0.55*
3	Rutin (50mg/kg)	95.01±1.32	123.33±1.48*	104.67±0.92*	92.01± 0.37*
4	Rutin (100mg/kg)	103.09±1.67	129.04±1.46	108.31±1.87*	94.83± 2.11*

S. No.	Treatment n=6	Fasting blood glucose level (mg/dl)
S. No.	Treatment n=6	Day 0	Day 5	Day 10	Day 15
1	Normal	97.14±1.53*	94.17 ± 1.25 *	91.83 ± 1.01*	88.67 ± 1.15 *
2	Diabetic control	181.67±1.12	189.11± 0.88	196.83± 1.08	199.8 ± 1.31
3	Standard (Glibenclamide 2.5mg/kg)	184.33±1.45	127.55±0.76*	116.51±1.01*	107.67±1.14*
4	Rutin (50mg/kg)	180.11±1.83	137.33±1.33*	125.83±1.34*	119.18±0.97*
5	Rutin (100mg/kg)	97.14±1.53*	94.17 ± 1.25 *	91.83 ± 1.01*	88.67 ± 1.15 *