DEVELOPMENT AND VALIDATION OF STABILITY INDICATING UPLC METHOD FOR THE SIMULTANEOUS ESTIMATION OF NETUPITANT AND PALONOSETRON IN CAPSULE
HTML Full TextDEVELOPMENT AND VALIDATION OF STABILITY INDICATING UPLC METHOD FOR THE SIMULTANEOUS ESTIMATION OF NETUPITANT AND PALONOSETRON IN CAPSULE
T. Venkata Raveendranath * 1, R. T. Saravanakumar 1 and Ch. K. V. L. S. N. Anjana 2
Department of Pharmacy 1, Annamalai University, Chidambaram - 608002, Tamil Nadu, India.
Department of Pharmaceutical Chemistry and Phytochemistry 2, Nirmala College of Pharmacy, Guntur - 522503, Andhra Pradesh, India.
ABSTRACT: A simple, accurate, and precise stability-indicating method was developed for the simultaneous estimation of the Netupitant (NTPT) and Palonosetron (PLSN) in a capsule by UPLC. Chromatographic elution was processed through an HSS C18 (100 × 2.1 mm, 1.8m) reverse phase column, and the mobile phase composition of 0.01N KH2PO4 buffer (4.0 pH) and acetonitrile in the ratio of 55:45 was pumped through a column at a flow rate of 0.3 ml/min. The column oven temperature was maintained at 30 °C, and the detection wavelength was processed at 274 nm. Retention times of NTPT and PLSN were found to be 1.682 min and 1.288 min, respectively. Repeatability of the method was determined in the form of %RSD, and findings were 0.9 and 1.0 for NTPT and PLSN, respectively. The percentage recovery of the method was found to be 99.98% and 99.61% for NTPT and PLSN, respectively. LOD, LOQ values obtained from regression equations of NTPT and PLSN were 2.174, 6.587mg/ml and 0.02, 0.05 mg/ml respectively. Regression equation of NTPT was y = 4923.1x ± 1915.4 and PLSN was y = 40065x ± 224.19. Two analytes were subjected for acid, peroxide, photolytic, alkali, neutral, and thermal degradation studies, and the results show that the percentage of degradation was found between 0.85% and 6.50%. Retention times and total run time of two drugs were decreased, and the developed method was simple and economical. So, the developed method can be adopted in industries as a regular quality control test for the quantification of NTPT and PLSN.
Keywords: |
Netupitant, Palonosetron, RP-UPLC, Stability studies, Precision
INTRODUCTION: NTPT/PLSN (trade name Akynzeo) is a combination drug for the prevention of acute and delayed chemotherapy-induced nausea and vomiting. NTPT is a selective neurokinin 1 (NK1) receptor antagonist with potential antiemetic activity.
NTPT competitively binds to and blocks the activity of the human substance P/NK1 receptors in the central nervous system (CNS), thereby inhibiting NK1-receptor binding of the endogenous tachykinin neuropeptide substance P (SP), which may result in the prevention of chemotherapy-induced nausea and vomiting (CINV).
SP is found in neurons of vagal afferent fibers innervating the brain-stem nucleus tractus solitarii and the area postrema, which contains the chemoreceptor trigger zone (CTZ), and maybe elevated in response to chemotherapy.
The NK-receptor is a G-protein receptor coupled to the inositol phosphate signal-transduction pathway and is found in both the nucleus tractus solitarii and the area postrema 1, 2. NTPT chemically designated as 2- [3, 5-Bis(trifluoromethyl)phenyl]-N,2-dimethyl-N- [4- (2- methylphenyl)- 6- (4-methyl-1- pipera-zinyl)-3- pyridinyl] propanamide with molecular weight and formula of 578.59 g/mole and C30H32F6N4O respectively Fig. 1.
PLSN is an antinauseant and antiemetic agent indicated for the prevention of nausea and vomiting associated with moderately-emetogenic cancer chemotherapy and for the prevention of post-operative nausea and vomiting. PLSN is a highly specific and selective serotonin 5-HT3 receptor antagonist that is pharmacologically related to other 5-HT3 receptor antagonists, but differs structurally 3-5. PLSN has a high affinity for 5-HT3 receptors, but has little to no affinity for other receptors. The serontonin 5-HT3 receptors are located on the nerve terminals of the vagus in the periphery, and centrally in the chemoreceptor trigger zone of the area postrema. It is suggested that chemo-therapeutic agents release serotonin from the entero-chromaffin cells of the small intestine by causing degenerative changes in the GI tract. The serotonin then stimulates the vagal and splanchnic nerve receptors that project to the medullary vomiting center, as well as the 5-HT3 receptors in the area postrema, thus initiating the vomiting reflex, causing nausea and vomiting 6-8. PLSN chemically designated as (3aS)-2-[(3S)-1-Aza-bicyclo[2.2.2] oct-3-yl]-2,3,3a,4,5,6-hexahydro-1H-benz[de] iso-quinolin-1-one with molecular weight and formula of 296.407 g/mole and C19H24N2O respectively Fig. 1.
FIG. 1: CHEMICAL STRUCTURES OF A) NTPT AND B) PLSN
The literature review unveils that a very less spectrometric 9, LC-MS/MS 10, and reverse-phase high-performance liquid chromatographic 11-19 techniques have been reported for the estimation of NTPT and PLSN. Based on the reported HPLC methods, there is a need to develop a stability-indicating RP-UPLC method for the simultaneous determination of NTPT and PLSN in bulk and capsule form with less retention times.
MATERIALS AND METHODS:
Chemicals and Reagents: API of NTPT and PLSN were obtained from spectrum Pharma Research Solutions, Hyderabad. HPLC-grade methanol and acetonitrile were procured from Merck chemical division, Mumbai, India; potassium dihydrogen orthophosphate, orthophosphoric acid, sodium dihydrogen orthophosphate and HPLC-grade water were bought from Rankem, avantor performance material India limited. Akynzeo capsules were obtained from a local pharmacy.
Chromatographic System: Liquid chromato-graphic UPLC system of Waters equipped with PDA (photodiode array detector), auto-sampling unit and HSS C18 (100 × 2.1 mm, 1.8m) reverse phase column. The mobile phase composition of 0.01N KH2PO4 buffer (4.0 pH) and acetonitrile in the ratio of 55:45 was pumped through a column at a flow rate of 0.3 ml/min. The column oven temperature was maintained at 30°C, and the detection wavelength was processed at 274 nm. Integration of output signals was monitored and processed by waters Empower software-2.0.
Diluent: Depending up on the solubility of the drugs, diluent was optimized. Acetonitrile and water in the ratio of 50:50% v/v were used as diluent.
Preparation of Standard Stock Solutions: Exactly weighed 150mg of NTPT and 0.25mg of PLSN poured into two 50ml volumetric flasks alone. 10ml of diluent was added and vortexed for 20 min. Flasks were made up with diluent and marked as standard stock solutions 1 and 2 (3000µg/ml of NTPT and 5.0 µg/ml PLSN). 1ml from each stock solution was pipetted out and taken into a 10ml volumetric flask and made up with diluent to get 300µg/ml of NTPT and 0.5µg/ml of PLSN.
Preparation of Sample Stock Solutions: 20 capsules were weighed, and the average weight of each tablet was calculated. The weight equivalent to 1 capsule was transferred into a 100ml volumetric flask, and 25 ml of diluent was added and sonicated for 25 min. Further, the volume was made up with diluent and filtered through a 0.45 µ filter (3000µg/ml of NTPT and 5.0 µg/ml PLSN). 1ml of the resultant solution was poured into a 10ml volumetric flask and made up with diluent (300µg/ml of NTPT and 0.5µg/ml of PLSN).
Preparation of Buffer: Accurately weighed 1.36gm of potassium dihydrogen orthophosphate in a 1000ml of volumetric flask consisting of about 900ml of milli-Q water and sonicated to degasify and make up the volume with water. Then 1ml of Triethylamine was added and PH adjusted to 4.0 with a dilute orthophosphoric acid solution.
Method Validation: The developed method for NTPT and PLSN was subjected for validation for the parameters like system suitability, linearity, robustness, the limit of detection (LOD), the limit of quantification (LOQ), precision, and accuracy as per the guidelines of ICH 20-24.
RESULTS AND DISCUSSION:
Method Development and Optimization: We tried different mobile phase combinations with methanol, water, acetonitrile, and buffer. At all the combinations, the resulting chromatograms got poor resolution, theoretical plates, and peak shape. Finally, excellent chromatographic efficiency parameters were obtained with the mobile phase composition of 0.01N KH2PO4 buffer (4.0 pH), and acetonitrile in the ratio of 55:45%v/v pumped through an HSS C18 (100 × 2.1 mm, 1.8m) reverse phase column, at a flow rate of 0.3 ml/min. The column oven temperature was maintained at 30°C, and the detection wavelength was processed at 274 nm. Based on the solubility, all the dilutions were made with acetonitrile and water in the ratio of 50:50% v/v. Retention times of NTPT and PLSN were found to be 1.682 min. and 1.288 min. respectively. An injection volume of 1.0 ml was infused through a UPLC system to get better performance.
System Suitability: The system suitability variables were estimated by preparing standard solutions of NTPT and PLSN, and the same was injected 6 times into the chromatographic system. The variables like peak tailing, resolution, and USP plate count were estimated 25, 26. The results were shown in Fig. 2 and Table 1.
FIG. 2: SYSTEM SUITABILITY CHROMATOGRAM OF NTPT AND PLSN
TABLE 1: SYSTEM SUITABILITY PARAMETERS FOR NTPT AND PLSN
S. no. | PLSN | NTPT | |||||
RT(min) | USP Plate Count | Tailing | RT(min) | USP Plate Count | Tailing | USP Resolution | |
1 | 1.293 | 2970 | 1.25 | 1.685 | 6606 | 6606 | 6606 |
2 | 1.296 | 3002 | 1.25 | 1.687 | 6397 | 6397 | 6397 |
3 | 1.300 | 2897 | 1.19 | 1.690 | 5927 | 5927 | 5927 |
4 | 1.302 | 2827 | 1.19 | 1.691 | 5660 | 5660 | 5660 |
5 | 1.302 | 2959 | 1.21 | 1.691 | 5701 | 5701 | 5701 |
6 | 1.313 | 3149 | 1.17 | 1.705 | 6960 | 6960 | 6960 |
Specificity: Method specificity was determined by infusing the blank, placebo, standard, and sample solutions into a chromatographic system, and the resulting chromatograms were evaluated for interference with the excipients, degradants, and other components may expect to be present 20. Blank, standard, formulation, and placebo chromatograms were represented in Fig. 3.
FIG. 3: CHROMATOGRAMS OF A) BLANK, B) PLACEBO, C) STANDARD AND D) SAMPLE
TABLE 2: REPEATABILITY RESULTS OF NTPT AND PLSN
S. no. | Area of NTPT | Area of PLSN |
1 | 1475960 | 19938 |
2 | 1467092 | 20243 |
3 | 1476887 | 20289 |
4 | 1472173 | 20112 |
5 | 1498861 | 19915 |
6 | 1462369 | 20425 |
Mean | 1475557 | 20154 |
SD | 12665.2 | 202.5 |
%RSD | 0.9 | 1.0 |
SD: Standard deviation; RSD: Relative standard deviation
Precision: The precision of the method was evaluated in terms of method precision and intermediate precision. The method precision (repeatability) was estimated by infusing 6 standard solutions and 6 sample solutions. Intermediate precision was evaluated by infusing 6 standard solutions and 6 sample solutions on different days by different employees on different chromatographic systems 23, 25. The peak responses of all the chromatograms were taken, and standard deviation, % RSD (relative standard deviation), and percentage assay of sample solutions were calculated. The findings were represented in Table 2 and 3.
TABLE 3: INTERMEDIATE PRECISION RESULTS OF NTPT AND PLSN
S. no. | Area of NTPT | Area of PLSN |
1 | 1414182 | 19232 |
2 | 1388187 | 19105 |
3 | 1375020 | 18991 |
4 | 1399247 | 18960 |
5 | 1386258 | 19438 |
6 | 1379109 | 18991 |
Mean | 1390334 | 19120 |
SD | 14352.1 | 185.9 |
%RSD | 1.0 | 1.0 |
SD: Standard deviation; RSD: Relative standard deviation
Accuracy: Method accuracy was estimated at three variable concentrations of 50%, 100%, and 150% level by spiking the known amount of the drug analytes 26. The % recovery at each level was calculated, and the findings were represented in Table 4.
TABLE 4: ACCURACY RESULTS OF NTPT AND PLSN
PLSN | NTPT | |||||||
% Level | Amount Spiked
(μg/ml) |
Amount recovered
(μg/ml) |
% Recovery | Mean %Recovery | Amount Spiked
(μg/ml) |
Amount recovered
(μg/ml) |
% Recovery | Mean %Recovery |
50% | 0.25 | 0.248 | 99.5 | 99.61%
|
150 | 149.856 | 99.90 |
99.98% |
0.25 | 0.25 | 100.0 | 150 | 148.957 | 99.30 | |||
0.25 | 0.247 | 99.0 | 150 | 149.591 | 99.73 | |||
100% | 0.5 | 0.497 | 99.5 | 300 | 299.675 | 99.89 | ||
0.5 | 0.495 | 99.1 | 300 | 299.944 | 99.98 | |||
0.5 | 0.507 | 101.4 | 300 | 298.962 | 99.65 | |||
150% | 0.75 | 0.753 | 100.4 | 450 | 449.892 | 99.98 | ||
0.75 | 0.741 | 98.9 | 450 | 448.685 | 99.71 | |||
0.75 | 0.747 | 99.6 | 450 | 451.107 | 100.25 |
Linearity: The linearity of the developed method was evaluated by processing 6 different concentration levels of both NTPT and PLSN over the concentration of 75 to 450 µg/ml and 0.125 to 0.75 µg/ml. Each concentration level was processed in triplicates 20, 24. The linearity plots were acquired by plotting peak response (on X-axis) versus concentration (on Y-axis). The results of the linearity were represented in Fig. 4, 5, and Table 5.
TABLE 5: LINEARITY RESULTS FOR NTPT AND PLSN
NTPT | PLSN | ||
Conc. (μg/ml) | Peak area | Conc. (μg/ml) | Peak area |
0 | 0 | 0 | 0 |
75 | 363525 | 0.125 | 5254 |
150 | 736887 | 0.25 | 10462 |
225 | 1134680 | 0.375 | 15451 |
300 | 1475001 | 0.5 | 20123 |
375 | 1844025 | 0.625 | 25277 |
450 | 2213099 | 0.75 | 30173 |
LOD and LOQ: LOD is the lowest quantity of drug in a sample that can be identified but cannot be quantified exactly. LOQ is the lowest quantity of a drug in an analyte which can be quantitatively estimated with suitable accuracy and precision. The LOD and LOQ values were calculated from the linearity data by utilizing the standard deviation and slope of the curve 20, 23. The resulting LOD and LOQ findings were represented in Table 6.
TABLE 6: LOD AND LOQ RESULTS FOR NTPT AND PLSN
Analyte | LOD (μg/ml) | LOQ (μg/ml) |
NTPT | 2.174 | 6.587 |
PLSN | 0.02 | 0.05 |
Robustness: The method robustness was processed by introducing small variation in the optimized LC conditions such as organic phase in the mobile phase (±5%), flow rate (-0.27 and +0.33 ml/ min), and column temperature (±5°C). The findings were shown in Table 7.
TABLE 7: ROBUSTNESS DATA FOR NTPT AND PLSN
S. no. | Variation in LC conditions | % RSD for NTPT | % RSD for PLSN |
1 | Flow rate (-) 0.27ml/min | 1.3 | 1.4 |
2 | Flow rate (+) 0.33ml/min | 1.1 | 0.9 |
3 | Organic phase -5% | 0.7 | 1.4 |
4 | Organic phase + 5% | 1.5 | 1.1 |
5 | Temperature at 25°C | 1.3 | 1.4 |
6 | Temperature at 35°C | 0.9 | 1.1 |
Degradation Studies:
Alkali Degradation Studies: To 1 ml of each stock solution of NTPT and PLSN, 1 ml of 1N NaOH was added to a 10 ml volumetric flask and kept at 60 °C for 30 min. The resulting solution was neutralized with 1ml of 1N HCl, and further, the solution was made up to the mark to get 300µg/ml and 0.5µg/ml concentrations of NTPT and PLSN, respectively. From that 1.0 µl of the solution was infused into a UPLC system, and the resultant chromatograms were analyzed for the stability of analytes 21. The findings were represented in Table 8 and Fig. 6.
TABLE 8: DEGRADATION DATA OF NTPT AND PLSN
Type of degradation | NTPT | PLSN | ||||
Area | %Recovered | % Degraded | Area | %Recovered | % Degraded | |
Acid | 1401393 | 94.78 | 5.22 | 18916 | 93.67 | 6.33 |
Alkali | 1425724 | 96.43 | 3.57 | 19453 | 96.33 | 3.67 |
Peroxide | 1409975 | 95.36 | 4.64 | 18881 | 93.50 | 6.50 |
Thermal | 1440170 | 97.41 | 2.59 | 19875 | 98.42 | 1.58 |
UV light | 1461415 | 98.84 | 1.16 | 19897 | 98.53 | 1.47 |
Neutral | 1465976 | 99.15 | 0.85 | 20027 | 98.53 | 1.47 |
FIG. 6: REPRESENTATIVE CHROMATOGRAMS OF A) UV-DEGRADATION, B) PEROXIDE DEGRADATION, C) THERMAL DEGRADATION, D) NEUTRAL DEGRADATION, E) ACID DEGRADATION AND F) ALKALI DEGRADATION
Photolytic Stability Study: For the photolytic stability study, NTPT 3000µg/ml and PLSN 5.0µg/ml solutions were exposed to UV-light by placing the solutions in UV cabinet for 1day or 200 Watt-hours/m2 in photostability chamber. The resulting solutions were combined in a 10ml volumetric flask and made up to the mark with diluent to get 30µg/ml and 0.5µg/ml concentrations of NTPT and PLSN, respectively. From that 1.0 µl of the solution was infused into a UPLC system, and the resultant chromatograms were analyzed for the stability of analytes. The findings were represented in Table 8 and Fig. 6.
Acid Degradation Studies: To 1 ml of each stock solution of NTPT and PLSN, 1ml of 1N Hydrochloric acid was added into a 10 ml volumetric flask and refluxed at 60 °C for 30 min. The resulting solution was neutralized with 1ml of 1N NaOH, and further, the resulting solution was made up to the mark to get 30µg/ml and 0.5µg/ml concentrations of NTPT and PLSN, respectively. From that 1.0 µl of the solution was infused into a UPLC system, and the resultant chromatograms were analyzed for the stability of analytes. The findings were represented in Table 8 and Fig. 6.
Neutral Degradation Studies: To 1 ml of each stock solution of NTPT and PLSN, 5 ml of water was added into a 10 ml volumetric flask and kept for refluxing at 60 °C for 6 h. Further, the resulting solution was made up to the mark to get 30µg/ml and 0.5µg/ml concentrations of NTPT and PLSN, respectively. From that 1.0 µl of the solution was infused into a UPLC system, and the resultant chromatograms were analyzed for the stability of analytes. The findings were represented in Table 8 and Fig. 6.
Oxidation: To 1 ml of each stock solution of NTPT and PLSN, 1 ml of 20% hydrogen peroxide (H2O2) was added to a 10 ml volumetric flask and kept at 60°C for 30 min. Further, the resulting solution was made up to the mark to get 30µg/ml and 0.5µg/ml concentrations of NTPT and PLSN, respectively. From that 1.0 µl of the solution was infused into a UPLC system, and the resultant chromatograms were analyzed for the stability of analytes. The findings were represented in Table 8 and Fig. 6.
Dry Heat Degradation Studies: To a 10 ml volumetric flask, add 1ml of each stock solution of NTPT and PLSN and monitored at 105 °C for 6 h in a hot air oven to perform the dry heat stability study. Further, the resulting solution was made up to the mark to get 30µg/ml and 0.5µg/ml concentrations of NTPT and PLSN, respectively. From that, 1.0 µl of the solution was infused into a UPLC system, and the resultant chromatograms were analyzed for the stability of analytes. The findings were represented in Table 8 and Fig. 6.
CONCLUSION: A simple, accurate and precise method was developed for the simultaneous estimation of the NTPT and PLSN in Tablet dosage form by RP-UPLC technique. Retention times of NTPT and PLSN were found to be 1.682 min and 1.288 min, respectively. Chromatographic elution was processed through an HSS C18 (100 × 2.1 mm, 1.8m) reverse phase column, and the mobile phase composition of 0.01N KH2PO4 buffer (4.0 pH) and acetonitrile in the ratio of 55:45 was pumped through a column at a flow rate of 0.3 ml/min. Repeatability of the method was determined in the form of %RSD, and findings were 0.9 and 1.0 for NTPT and PLSN, respectively. LOD, LOQ values obtained from regression equations of NTPT and PLSN were 2.174, 6.587mg/ml and 0.02, 0.05 mg/ml respectively. Two analytes were subjected for acid, peroxide, photolytic, alkali, neutral, and thermal degradation studies, and the results show that the percentage of degradation was found between 0.85% and 6.50%. Retention times and total run time of two drugs were decreased, and the developed method was simple and economical. So, the developed method can be adopted in industries as a regular quality control test for the quantification of NTPT and PLSN.
ACKNOWLEDGEMENT: Nil
CONFLICTS OF INTEREST: The authors declare that there are no conflicts of interest regarding the paper's publication.
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How to cite this article:
Raveendranath TV, Saravanakumar RT and Anjana CKVLSN: Development and validation of stability indicating UPLC method for the simultaneous estimation of netupitant and palonosetron in capsule. Int J Pharm Sci & Res 2021; 12(7): 3693-00. doi: 10.13040/IJPSR. 0975-8232.12(7).3693-00.
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Article Information
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3693-3700
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English
IJPSR
T. V. Raveendranath *, R. T. Saravanakumar and C. K. V. L. S. N. Anjana
Department of Pharmacy, Annamalai University, Chidambaram, Tamil Nadu, India.
ravi.6030@gmail.com
10 July 2020
20 November 2020
06 May 2021
10.13040/IJPSR.0975-8232.12(7).3693-00
01 July 2021