Abstract
Andrographolide, the primary bioactive constituent of Andrographis paniculata, is a promising natural substance with numerous pharmacotherapy uses. Low water solubility, short half-life, and low permeability necessitate the development of a delivery system that enhances its entrapment efficiency, bioavailability, lymphatic targeting, and by-pass hepatic effect. The andrographolide-loaded solid lipid nanoparticles were fabricated by melt-emulsification and ultrasonication and optimized with Design-Expert software. In the optimal formulation, Glycerol monostearate as the solid lipid and Poloxamer 407 and Span 60 as surfactants were used. Optimum AND-SLN was observed to have a mean particle size, polydispersity index, zeta potential, and entrapment efficiency of 193.84 nm, 0.211, − 22.8 mV, and 83.70% respectively. An optimized formulation was characterized by examining surface morphology, X-ray diffraction, and differential scanning calorimetry. In vitro studies have shown sustained drug release from AND-SLN for up to 24 h. The stability studies showed that there was no significant change in the mean particle size and entrapment efficiency after storage at 4 ± 2 °C and 25 ± 2 °C/60 ± 5% RH. In in vivo pharmacokinetics studies, AND-SLN was found to have enhanced bioavailability and specificity in the spleen and thymus compared to plasma, providing evidence that the formulations could enhance target specificity and bioavailability in comparison to pure drugs. The H&E staining of the liver, spleen, and thymus treated with the AND-SLN revealed no signs of damage histopathologically. Thus, AND-SLN possess a high potential for improved efficacy and are an efficient vehicle for delivering drugs to the lymphatic system.
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Abbreviations
- AND:
-
Andrographolide
- AND-SLN:
-
Andrographolide-loaded solid lipid nanoparticles
- AND-Susp:
-
Suspension of andrographolide
- BBB:
-
Box–Behnken design
- CPCSEA:
-
The Committee for the Purpose of Control and Supervision of Experiments on Animals
- DLS:
-
Dynamic light scattering
- DSC:
-
Differential scanning calorimetry
- EE:
-
Entrapment efficiency
- FT-IR:
-
Fourier transform infrared spectroscopy
- GMS:
-
Glycerol monostearate
- H&E:
-
Hematoxylin and eosin
- HPLC:
-
High-performance liquid chromatography
- ICH:
-
International Conference on Harmonisation of Technical Requirements for Registration of Pharmaceuticals for Human Use
- PDI:
-
Polydispersity index
- PS:
-
Particle size
- RH:
-
Relative humidity
- rpm:
-
Revolutions per minute
- SD:
-
Standard deviation
- SEM:
-
Scanning electron microscopy
- SLNs:
-
Solid lipid nanoparticles
- TEM:
-
Transmission electron microscopy
- UV:
-
Ultraviolet
- XRD:
-
X-ray diffraction
- ZP:
-
Zeta potential
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Acknowledgements
The authors are grateful for the facilities provided by the Management and Principal of SRIP, Kumhari. We also recognize everyone who helped us conduct this research directly and indirectly.
Funding
The Chhattisgarh Council of Science & Technology in the form of a grant from the CCOST/MRP/1106/2015 and the CCOST/MRP/1120/2015 project, CGCOST, Raipur, Chhattisgarh, India, provided financial help for conducting these research projects.
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Both authors contributed to framing the idea, studying the conception, and designing the manuscript. Conceptualization: (Saurabh Shrivastava), (Chanchal Deep Kaur); Methodology: (Saurabh Shrivastava); Software: (Saurabh Shrivastava); Formal analysis and investigation: (Saurabh Shrivastava); Writing—original draft preparation: (Saurabh Shrivastava), (Chanchal Deep Kaur); Writing—review and editing: (Saurabh Shrivastava), (Chanchal Deep Kaur); Funding acquisition: (Chanchal Deep Kaur); Resources: (Saurabh Shrivastava), (Chanchal Deep Kaur); Supervision: (Chanchal Deep Kaur).
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Experimental protocols were approved by the Institutional Animal Ethical Committee (SRIP/IAEC/2019–20/191/07), and studies were conducted under CPCSEA guidelines. Human subjects were not involved in this study, so there was no need for informed consent from the participants. All institutional and national guidelines for the care and use of laboratory animals were followed.
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Highlights
• Nanocarriers can improve the therapeutic profile of AND.
• The AND-SLN was prepared by melt-emulsification ultrasonication and optimized by Design-Expert software.
• An optimized formulation was characterized by DSC, XRD, and TEM.
• AND-SLN showed excellent in vitro and in vivo characteristics.
• AND-SLN is efficacious carriers of drugs targeting the lymphatic system with a high potential for improved efficacy.
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Shrivastava, S., Kaur, C.D. Development of andrographolide-loaded solid lipid nanoparticles for lymphatic targeting: Formulation, optimization, characterization, in vitro, and in vivo evaluation. Drug Deliv. and Transl. Res. 13, 658–674 (2023). https://doi.org/10.1007/s13346-022-01230-6
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DOI: https://doi.org/10.1007/s13346-022-01230-6