1. ASEMINAR ONA REVIEW ON MICRONEEDLESDEPARTMENT OF PHARMACEUTICSGuided by.Presented by.DR. BANERGEE S. K.Mr. ghanvat mitesh d.m. Pharm, Ph. d M.PHARM FIRST YEAR VISHAL JUNNAR SEVA MANDAL,SVISHAL INSTITUTE OF PHARMACEUTICAL EDUCATION AND RESEARCH, ALE, PUNE

2. CONTENTS INTRODUCTION MICRONEEDLES TYPES OF MICRONEEDLES FABRICATION TECHNIQUE OF MICRONEEDLES COATING OF MICRONEEDLES PENITRATION OF MICRONEEDLES EVALUATION OF MICRONEEDLES ADVANTAGES OF MICRONEEDLES DISADVANTAGES OF MICRONEEDLES CONCLUSION REFERENCES 3. I. INTRODUCTIONPatch-based transdermal drug delivery offers a convenient way to administer drugs without the drawbacks of standard hypodermic injections relating to patient acceptability and injection safety. Types - Routes Of Administration New Drug Delivery System Transdermal Drug Delivery System 4. MICRONEEDLES INTRODUCTION Figure 1: Microneedle with blue color (electron micrograph). 5. TYPES OF MICRONEEDLESI. Solid microneedles 1. Silicon microprobes 2. Silicon microneedles 3. Metal microneedlesII. Hollow microneedles 1. Silicon hollow microneedles 2. Metal hollow microneedles 3. Glass hollow microneedles 6. I.Solid microneedles1.Silicon microprobes Figure 2: A single silicon microprobe fabricated by anisotropic silicon etching andused to deliver genes to plant and mammalian cells. 7. 2. Silicon microneedlesFigure 3: Arrays of solid silicon microneedles used in transdermal drug delivery studyand demonstrated enhancement of dermal permeability. 8. 3. Metal microneedlesFigure 4: Solid stainless steel microneedle arrays Figure 5: Images of coated solid metalused in an insulin delivery test using diabetic rats microneedles.in vivo. 9. II. Hollow microneedles1.Silicon hollow microneedlesFigure 6: Arrays of symmetric silicon hollow Figure 7: Arrays of hollow silicon microneedlesmicroneedles used in fluid injectionused for transdermal liquid transport. experiments. 10. 2. Metal hollow microneedles Figure 8: An array of hollow, metallic microneedles used for skin insertion test. 11. 3. Glass hollow microneedlesFigure 9: A single, beveled-tip, hollow glass microneedle used inmicro-infusion within human cadaver skin. 12. Other type of microneedlesFigure 10: Solid biodegradable polymer microneedles with calcium encapsulated at the needle tips used for in vitro transdermal insertion test. 13. FABRICATION OF MICRONEEDLES1. Fabrication of solid microneedles2. Fabrication of hollow microneedles Figure 12: A schematic representation of fabrication process used in making thehollow microneedle array. 14. COATING OF MICRONEEDLESCoating solution: 1% (w/v) carboxymethyalcellulose sodium salt 0.5% lutrol F-68 NF drug model/ biopharmaceutical.Drug model: 0.01% suforhodamine 0.01% calcium 3% vitamin B 1% bovine serum albumin 0.5% plasmid DNA 15. PENETRATION OF MICRONEEDLES Figure 13: Penetration of microneedles into the skin. 16. EVALUATION OF MICRONEEDLES In vitro evaluationIn vitro evaluation is carried out to determineoptimization of microneedles, penetration force,strength of microneedles, delivery efficacy etc. In vivo evaluationThe in vivo preclinical evaluation of microneedles was performed on animals like mice and guinea pig in order to determine the delivery efficacy, penetration force, bending force and to evaluate the skin toxicity testes using vaccine delivery. 17. ADVANTAGES OF MICRONEEDLES Pain-free administration. Easy to use. Discreetness. Continuous release. Controlled release. Safer handling. 18. DISADVANTAGES OF MICRONEEDLES Local inflammation Skin irritation Expensive 19. CONCLUSION require a very low insertion force . penetrate human skin. fabricated with high process yield. 20. REFERENCES Roxhed N; A fully integrated microneedle-based transdermal drugdelivery system; 2007; Royal institute of technology. getDocument_urn_nbn_se_kth_diva-4484-2__fulltext.pdf Lad J; Clinical evaluation of a novel microneedle patch, 2006-2007;Cranfield University; search_hl=en&q=drug+used+for+preparation+microneedles(pdf)&sta rt20&sa=N.pdf Satoskar RS, Bhandarkar SD and Ainapure SS. Text book ofpharmacology and pharmacotherapeutics. 2003, 18th Ed. 5-9. Roxhed N; A fully integrated microneedle-based transdermal drugdelivery system; 2007; Royal institute of technology.getDocument_urn_nbn_se_kth_diva-4484-2__fulltext.pdf