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De Silva L, Fu JY, Htar TT, Wan Kamal WHB, Kasbollah A, Muniyandy S, Chuah LH. Biodistribution Study of Niosomes in Tumor-Implanted BALB/C Mice Using Scintigraphic Imaging. Front Pharmacol 2022; 12:778396. [PMID: 35069200 PMCID: PMC8777053 DOI: 10.3389/fphar.2021.778396] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Accepted: 12/10/2021] [Indexed: 11/13/2022] Open
Abstract
The purpose of this work was to study the biodistribution of niosomes in tumor-implanted BALB/c mice using gamma scintigraphy. Niosomes were first formulated and characterized, then radiolabeled with Technetium-99 m (99mTc). The biodistribution of 99mTc-labeled niosomes was evaluated in tumor-bearing mice through intravenous injection and imaged with gamma scintigraphy. The labeled complexes possessed high radiolabeling efficiency (98.08%) and were stable in vitro (>80% after 8 h). Scintigraphic imaging showed negligible accumulation in the stomach and thyroid, indicating minimal leaching of the radiolabel in vivo. Radioactivity was found mainly in the liver, spleen and kidneys. Tumor-to-muscle ratio indicated a higher specificity of the formulation for the tumor area. Overall, the formulated niosomes are stable both in vitro and in vivo, and show preferential tumor accumulation.
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Affiliation(s)
- Leanne De Silva
- School of Pharmacy, Monash University Malaysia, Bandar Sunway, Malaysia
| | - Ju-Yen Fu
- Nutrition Unit, Malaysian Palm Oil Board, Bandar Baru Bangi, Malaysia
| | - Thet Thet Htar
- School of Pharmacy, Monash University Malaysia, Bandar Sunway, Malaysia
| | | | - Azahari Kasbollah
- Medical Technology Division, Malaysian Nuclear Agency, Bangi, Malaysia
| | - Saravanan Muniyandy
- Department of Pharmacy, Fatima College of Health Sciences, Al Ain, United Arab Emirates
| | - Lay-Hong Chuah
- School of Pharmacy, Monash University Malaysia, Bandar Sunway, Malaysia
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Singh M, Hassan N, Verma D, Thakur P, Panda BP, Panda AK, Sharma RK, Mirza A, Mansoor S, Alrokayan SH, Khan HA, Ahmad P, Iqbal Z. Design of expert guided investigation of native L-asparaginase encapsulated long-acting cross-linker-free poly (lactic-co-glycolic) acid nanoformulation in an Ehrlich ascites tumor model. Saudi Pharm J 2020; 28:719-728. [PMID: 32550804 PMCID: PMC7292879 DOI: 10.1016/j.jsps.2020.04.014] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2020] [Accepted: 04/28/2020] [Indexed: 02/08/2023] Open
Abstract
Present study explores native L-asparaginase encapsulated long-acting cross-linker-free PLGA-nanoformulation in an Ehrlich ascites tumor model. L-asparaginase-PLGA nanoparticles for tumor were prepared using a double emulsion solvent evaporation technique, optimized and validated by Box-Behnken Design. L-ASN-PNs showed a particle size of 195 nm ± 0.2 nm and a PDI of 0.2. Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM) techniques revealed its smooth morphology and elicited an in-vitro release of 80% of the drug, following the Higuchi drug release model. In-vivo studies of L-ASN-PNs on an Ehrlich ascites tumor (EAT) model were completed and compared with the standard medication of 5-fluorouracil (5-FU) treatment. L-ASN-PN treated mice showed a 51.15% decrease in tumor volume and 100% survival rate with no reduction in body weight, no haemotoxicity and no hepatotoxicity, as evident from the hematological parameters, and liver enzyme parameters that were well within the prescribed limits. Chemotherapy has severe side effects and restricted therapeutic success. Henceforth, the purported L-Asparaginase PLGA nanoparticles are a suitable entity for better tumor regression, intra-tumor accumulation and no hematological side-effects.
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Affiliation(s)
- Manvi Singh
- Department of Pharmaceutics, School of Pharmaceutical Education and Research, Jamia Hamdard, New Delhi, Delhi 110062, India
| | - Nazia Hassan
- Department of Pharmaceutics, School of Pharmaceutical Education and Research, Jamia Hamdard, New Delhi, Delhi 110062, India
| | - Devina Verma
- Department of Pharmaceutics, School of Pharmaceutical Education and Research, Jamia Hamdard, New Delhi, Delhi 110062, India
| | - Pragya Thakur
- Department of Pharmaceutics, School of Pharmaceutical Education and Research, Jamia Hamdard, New Delhi, Delhi 110062, India
| | - Bibhu Prasad Panda
- Microbial and Pharmaceutical Biotechnology Laboratory, Jamia Hamdard, New Delhi 110062, India
| | - Amulya Kumar Panda
- Product Development Cell, National Institute of Immunology, Aruna Asaf Ali Marg, New Delhi 110067, India
| | - Rakesh Kumar Sharma
- Division of Radiopharmaceuticals and Radiation Biology, Institute of Nuclear Medicine and Allied Sciences, Brig. SK Mazumdar Road, Delhi 110 054, India
| | - Aamir Mirza
- Department of Pharmaceutics, School of Pharmaceutical Education and Research, Jamia Hamdard, New Delhi, Delhi 110062, India
| | | | - Salman H. Alrokayan
- Department of Biochemistry, College of Science, King Saudi University, P.O. Box. 2455, Riyadh 11451, Saudi Arabia
| | - Haseeb A. Khan
- Department of Biochemistry, College of Science, King Saudi University, P.O. Box. 2455, Riyadh 11451, Saudi Arabia
| | - Parvaiz Ahmad
- Botany and Microbiology Department, College of Science, King Saudi University, P.O. Box. 2460, Riyadh 11451, Saudi Arabia
| | - Zeenat Iqbal
- Department of Pharmaceutics, School of Pharmaceutical Education and Research, Jamia Hamdard, New Delhi, Delhi 110062, India
- Corresponding author.
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De Silva L, Fu JY, Htar TT, Muniyandy S, Kasbollah A, Wan Kamal WHB, Chuah LH. Characterization, optimization, and in vitro evaluation of Technetium-99m-labeled niosomes. Int J Nanomedicine 2019; 14:1101-1117. [PMID: 30863048 PMCID: PMC6391155 DOI: 10.2147/ijn.s184912] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Background and purpose Niosomes are nonionic surfactant-based vesicles that exhibit certain unique features which make them favorable nanocarriers for sustained drug delivery in cancer therapy. Biodistribution studies are critical in assessing if a nanocarrier system has preferential accumulation in a tumor by enhanced permeability and retention effect. Radiolabeling of nanocarriers with radioisotopes such as Technetium-99m (99mTc) will allow for the tracking of the nanocarrier noninvasively via nuclear imaging. The purpose of this study was to formulate, characterize, and optimize 99mTc-labeled niosomes. Methods Niosomes were prepared from a mixture of sorbitan monostearate 60, cholesterol, and synthesized D-α-tocopherol polyethylene glycol 1000 succinate-diethylenetriaminepentaacetic acid (synthesis confirmed by 1H and 13C nuclear magnetic resonance spectroscopy). Niosomes were radiolabeled by surface chelation with reduced 99mTc. Parameters affecting the radiolabeling efficiency such as concentration of stannous chloride (SnCl2·H2O), pH, and incubation time were evaluated. In vitro stability of radiolabeled niosomes was studied in 0.9% saline and human serum at 37°C for up to 8 hours. Results Niosomes had an average particle size of 110.2±0.7 nm, polydispersity index of 0.229±0.008, and zeta potential of −64.8±1.2 mV. Experimental data revealed that 30 µg/mL of SnCl2·H2O was the optimal concentration of reducing agent required for the radiolabeling process. The pH and incubation time required to obtain high radiolabeling efficiency was pH 5 and 15 minutes, respectively. 99mTc-labeled niosomes exhibited high radiolabeling efficiency (>90%) and showed good in vitro stability for up to 8 hours. Conclusion To our knowledge, this is the first study published on the surface chelation of niosomes with 99mTc. The formulated 99mTc-labeled niosomes possessed high radiolabeling efficacy, good stability in vitro, and show good promise for potential use in nuclear imaging in the future.
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Affiliation(s)
- Leanne De Silva
- School of Pharmacy, Monash University Malaysia, Bandar Sunway, Selangor, Malaysia,
| | - Ju-Yen Fu
- Nutrition Unit, Malaysian Palm Oil Board, Bandar Baru Bangi, Selangor, Malaysia,
| | - Thet Thet Htar
- School of Pharmacy, Monash University Malaysia, Bandar Sunway, Selangor, Malaysia,
| | - Saravanan Muniyandy
- Department of Pharmacy, Fatima College of Health Sciences, Al Ain, United Arab Emirates
| | - Azahari Kasbollah
- Medical Technology Division, Malaysian Nuclear Agency, Bangi, Selangor, Malaysia
| | | | - Lay-Hong Chuah
- School of Pharmacy, Monash University Malaysia, Bandar Sunway, Selangor, Malaysia, .,Advanced Engineering Platform, Monash University Malaysia, Bandar Sunway, Selangor, Malaysia,
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Abstract
Porphyrin-lipid nanovesicles (PLN) have been developed with intrinsic capabilities as activatable multimodal photonic contrast agents. Radiolabeling of PLN encapsulating drugs could eventually be able to provide quantitative in vivo information for diagnosing and treating diseases. In this study, we developed (99m)Tc-labeled porphyrin-lipid nanovesicles ((99m)Tc-PLN) as a cargo-encapsulated formulation without significant impact on liposome integrity and encapsulation stability. 50 mM calcein was encapsulated into PLN by probe sonication. The size of the PLN was about 150 nm. The PLN were then reacted with (99m)Tc using SnCl2 dissolved in 1 mM HCl as a reducing agent and incubated for 10 min at 22 °C. The radiolabeling efficiency and stability of (99m)Tc-PLN were evaluated by instant thin-layer chromatography and low-pressure liquid chromatography (LPLC). (99m)Tc labeling was successful with a >92% labeling efficiency. LPLC showed that the liposomal elution peaks of the porphyrin-lipid and the calcein overlapped with the radioactivity elution peak of (99m)Tc-labeled PLN. The (99m)Tc-labeling procedure did not change the size of PLN. Encapsulated calcein remained inert inside PLN. Thus, this work lays out a simple and effective radiolabeling method using SnCl2 in HCl in the preparation of (99m)Tc-PLN.
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Affiliation(s)
- Jae-Ho Lee
- Radiopharmaceutical Laboratory, Division of Nuclear Medicine, Department of Radiology and Imaging Sciences, Warren G. Magnuson Clinical Center, National Institutes of Health , Bethesda, MD , USA and
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Snehalatha M, Kolachina V, Saha RN, Babbar AK, Sharma N, Sharma RK. Enhanced tumor uptake, biodistribution and pharmacokinetics of etoposide loaded nanoparticles in Dalton's lymphoma tumor bearing mice. J Pharm Bioallied Sci 2013; 5:290-7. [PMID: 24302837 PMCID: PMC3831742 DOI: 10.4103/0975-7406.120081] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2013] [Revised: 04/18/2013] [Accepted: 07/04/2013] [Indexed: 11/04/2022] Open
Abstract
BACKGROUND Nanotechnology plays a remarkable role in the field of the treatment of Lymphomas associated with tumor. OBJECTIVE The purpose of this study is to determine and to compare the tumor uptake, biodistribution and pharmacokinetics of radiolabeled etoposide and etoposide loaded nanoparticles in Dalton's Lymphoma tumor bearing mice and healthy mice. MATERIALS AND METHODS Etoposide loaded nanoparticles were prepared by nanoprecipitation technique using the poly (lactic-co-glycolic) acid (PLGA) in the presence of Pluronic F 68 (F 68) as a stabilizer and characterized by particle size analyzer, zeta potential and transmission electron microscope. Etoposide and etoposide loaded nanoparticles were labeled with Technetium-99m (Tc-99m) by the direct method and various quality control tests were carried out. The labeling parameters like labeling efficiency, stability, etc., were optimized to get high labeling efficiency as well as stability of the labeled formulations. Tc-99m labeled formulations were administered intravenously in Balb C mice and their biodistribution and pharmacokinetics were determined. RESULTS Mean size of the etoposide loaded PLGA nanoparticles was found to be 105.1 nm. The concentration of both free etoposide and nanoparticles increased with time and showed higher tumor concentrations of both free etoposide and nanoparticles increased with time and showed higher retention, indicating their applicability in effective and prolonged tumor therapy. Nuclear scintigraphic images confirm the presence of labeled complexes at the site of tumor for 24 h at higher concentration than in the normal muscles. CONCLUSION This study indicated higher tumor affinity and targeting properties of etoposide loaded nanoparticles than free etoposide.
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Affiliation(s)
- Movva Snehalatha
- Department of Pharmaceutics, Birla Institute of Technology and Science, Pilani, Rajasthan, India
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Abstract
Liposomes are used as a delivery vehicle for drug molecules and imaging agents. The major impetus in their biomedical applications comes from the ability to prolong their circulation half-life after administration. Conventional liposomes are easily recognized by the mononuclear phagocyte system and are rapidly cleared from the blood stream. Modification of the liposomal surface with hydrophilic polymers delays the elimination process by endowing them with stealth properties. In recent times, the development of various materials for surface engineering of liposomes and other nanomaterials has made remarkable progress. Poly(ethylene glycol)-linked phospholipids (PEG-PLs) are the best representatives of such materials. Although PEG-PLs have served the formulation scientists amazingly well, closer scrutiny has uncovered a few shortcomings, especially pertaining to immunogenicity and pharmaceutical characteristics (drug loading, targeting, etc.) of PEG. On the other hand, researchers have also begun questioning the biological behavior of the phospholipid portion in PEG-PLs. Consequently, stealth lipopolymers consisting of non-phospholipids and PEG-alternatives are being developed. These novel lipopolymers offer the potential advantages of structural versatility, reduced complement activation, greater stability, flexible handling and storage procedures and low cost. In this article, we review the materials available as alternatives to PEG and PEG-lipopolymers for effective surface modification of liposomes.
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Affiliation(s)
- Okhil K Nag
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Oklahoma Health Sciences Center, 1110 North Stonewall Avenue, Oklahoma City, OK 73117, USA.
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Lee JH, Cheng KT, Malinin V, Li Z, Yao Z, Lee SJ, Gould CM, Olivier KN, Chen C, Perkins WR, Paik CH. (99m)Tc-labeled therapeutic inhaled amikacin loaded liposomes. J Liposome Res 2013; 23:336-42. [PMID: 23879241 DOI: 10.3109/08982104.2013.819889] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
The radiolabeling of the liposome surface can be a useful tool for in vivo tracking of therapeutic drug loaded liposomes. We investigated radiolabeling therapeutic drug (i.e. an antibiotic, amikacin) loaded liposomes with (99m)Tc, nebulization properties of (99m)Tc-labeled liposomal amikacin for inhalation ((99m)Tc-LAI), and its stability by size exclusion low-pressure liquid chromatography (LPLC). LAI was reacted with (99m)Tc using SnCl2 dissolved in ascorbic acid as a reducing agent for 10 min at room temperature. The labeled products were then purified by anion exchange resin. The purified (99m)Tc-LAI in 1.5% NaCl solution was incubated at 4 °C to assess its stability by LPLC. The purified (99m)Tc-LAI was subjected to studies with a clinically used nebulizer (PARI eFlow®) and the Anderson Cascade Impactor (ACI). The use of ascorbic acid at 0.91 mM resulted in a quantitative labeling efficiency. The LPLC profile showed that the liposomal peak of LAI detected by a UV monitor at both 200 nm and 254 nm overlapped with the radioactivity peak of (99m)Tc-LAI, indicating that (99m)Tc-LAI is suitable for tracing LAI. The ACI study demonstrated that the aerosol droplet size distribution determined gravimetrically was similar to that determined by radioactivity. The liposome surface labeling method using SnCl₂ in 0.91 mM ascorbic acid produced (99m)Tc-LAI with a high labeling efficiency and stability that are adequate to evaluate the deposition and clearance of inhaled LAI in the lung by gamma scintigraphy.
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Affiliation(s)
- Jae-Ho Lee
- Radiopharmaceutical Laboratory, Division of Nuclear Medicine, Department of Radiology and Imaging Sciences, Warren G. Magnuson Clinical Center, National Institutes of Health, Bethesda , MD 20892 , USA
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Chaudhari KR, Ukawala M, Manjappa AS, Kumar A, Mundada PK, Mishra AK, Mathur R, Mönkkönen J, Murthy RSR. Opsonization, biodistribution, cellular uptake and apoptosis study of PEGylated PBCA nanoparticle as potential drug delivery carrier. Pharm Res 2011; 29:53-68. [PMID: 21744174 DOI: 10.1007/s11095-011-0510-x] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2011] [Accepted: 06/10/2011] [Indexed: 10/18/2022]
Abstract
PURPOSE For nanocarrier-based targeted delivery systems, preventing phagocytosis for prolong circulation half life is a crucial task. PEGylated poly(n-butylcyano acrylate) (PBCA) NP has proven a promising approach for drug delivery, but an easy and reliable method of PEGylation of PBCA has faced a major bottleneck. METHODS PEGylated PBCA NPs containing docetaxel (DTX) by modified anionic polymerization reaction in aqueous acidic media containing amine functional PEG were made as an single step PEGylation method. In vitro colloidal stability studies using salt aggregation method and antiopsonization property of prepared NPs using mouse macrophage cell line RAW264 were performed. In vitro performance of anticancer activity of prepared formulations was checked on MCF7 cell line. NPs were radiolabeled with 99mTc and intravenously administered to study blood clearance and biodistribution in mice model. RESULTS These formulations very effectively prevented phagocytosis and found excellent carrier for drug delivery purpose. In vivo studies display long circulation half life of PBCA-PEG20 NP in comparison to other formulations tested. CONCLUSIONS The PEGylated PBCA formulation can work as a novel tool for drug delivery which can prevent RES uptake and prolong circulation half life.
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Affiliation(s)
- Kiran Ramanlal Chaudhari
- Pharmacy Department TIFAC Centre of Relevance & Excellence in New Drug Delivery Systems G.H. Patel Pharmacy Building, The Maharaja Sayajirao University of Baroda, Donor's Plaza, Fatehgunj, Vadodara 390002, India
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Reddy LH, Sharma RK, Chuttani K, Mishra AK, Murthy RR. Etoposide-incorporated tripalmitin nanoparticles with different surface charge: formulation, characterization, radiolabeling, and biodistribution studies. AAPS J 2004; 6:e23. [PMID: 15760108 PMCID: PMC2751248 DOI: 10.1208/aapsj060323] [Citation(s) in RCA: 101] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Etoposide-incorporated tripalmitin nanoparticles with negative (ETN) and positive charge (ETP) were prepared by melt emulsification and high-pressure homogenization techniques. Spray drying of nanoparticles led to free flowing powder with excellent redispersibility. The nanoparticles were characterized by size analysis, zeta potential measurements, and scanning electron microscopy. The mean diameter of ETN and ETP nanoparticles was 391 nm and 362 nm, respectively, and the entrapment efficiency was more than 96%. Radiolabeling of etoposide and nanoparticles was performed with Technetium-99m (99mTc) with high labeling efficiency and in vitro stability. The determination of binding affinity of 99mTc-labeled complexes by diethylene triamine penta acetic acid (DTPA) and cysteine challenge test confirmed low transchelation of 99mTc-labeled complexes and high in vitro stability. Pharmacokinetic data of radiolabeled etoposide, ETN, and ETP nanoparticles in rats reveal that positively charged nanoparticles had high blood concentrations and prolonged blood residence time. Biodistribution studies of 99mTc-labeled complexes were performed after intravenous administration in mice. Both ETN and ETP nanoparticles showed significantly lower uptake by organs of the reticuloendothelial system such as liver and spleen (P < .001) compared with etoposide. The ETP nanoparticles showed a relatively high distribution to bone and brain (14-fold higher than etoposide and ETN at 4 hours postinjection) than ETN nanoparticles. The ETP nanoparticles with long circulating property could be a beneficial delivery system for targeting to tumors by Enhanced Permeability and Retention effect and to brain.
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Affiliation(s)
- Lakkireddy Harivardhan Reddy
- />Drug Delivery Research Laboratory, Center of Relevance and Excellence in NDDS, Pharmacy Department, M. S. University, G. H. Patel Building, Donor's Plaza, Fatehgunj, 390002 Baroda, Gujarat India
| | - Rakesh Kumar Sharma
- />Department of Radiopharmaceuticals and Radiation Biology, Institute of Nuclear Medicine and Allied Sciences, Brigadier S. K. Mazumdar Road, 110054 Delhi, India
| | - Krishna Chuttani
- />Department of Radiopharmaceuticals and Radiation Biology, Institute of Nuclear Medicine and Allied Sciences, Brigadier S. K. Mazumdar Road, 110054 Delhi, India
| | - Anil Kumar Mishra
- />Department of Radiopharmaceuticals and Radiation Biology, Institute of Nuclear Medicine and Allied Sciences, Brigadier S. K. Mazumdar Road, 110054 Delhi, India
| | - Rayasa Ramachandra Murthy
- />Drug Delivery Research Laboratory, Center of Relevance and Excellence in NDDS, Pharmacy Department, M. S. University, G. H. Patel Building, Donor's Plaza, Fatehgunj, 390002 Baroda, Gujarat India
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