1
|
Labanian S, Faghihi H, Montazeri H, Jafarian A. Freeze-drying of bupivacaine lipospheres: preparation, characterization, and evaluation of anti-microbial properties. Daru 2024; 32:207-214. [PMID: 38421501 PMCID: PMC11087389 DOI: 10.1007/s40199-024-00506-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Accepted: 02/08/2024] [Indexed: 03/02/2024] Open
Abstract
PURPOSE To prepare freeze-dried bupivacaine lipospheres intended for topical application in burn injuries. The aim was improving the storage stability and developing a prolonged release pattern to tackle the adverse reactions resulting from the frequent administration of bupivacaine. METHODS The lipospheres were prepared by hot-melt dispersion method employing bupivacaine base at 1.5 and 3%w/w, tristearin 6% w/w as the core while dipalmitoyl phosphatidylcholine (DPPC) and soy phosphatidylcholine (SPC) as the coat at 0.75, 1.5 and 3% w/w. The lotion was then freeze-dried and cryoprotected by sucrose 3% w/w. Evaluation was carried out through loading and release analysis, storage study, particle characterization including morphology, zeta potential and particle size as well as anti-microbial assessment. RESULTS The highest loading, (87.6 ± 0.1%), was achieved using bupivacaine 3% and SPC 0.75%. After 6 months of storage at 4 ͦC, the loading in the lotion and the freeze-dried samples were 17.4 ± 0.2 and 87.2 ± 0.3%, respectively. In vitro dissolution test demonstrated 94.5% and 95% of bupivacaine release from lotion and freeze-dried samples, after 24 h. The respective zeta potential of -1.30 and 26 mV was recorded for lotion and solid-state bupivacaine. Micromeritic evaluation of freeze-dried powder exhibited particle size of 35.23 ± 2.02 μm and highly-wrinkled-irregular morphology without detectable needle structures related to drug free crystals. The powder had rapid reconstitution property and antibacterial activity. CONCLUSION Freeze- drying holds a promising potential to improve the storage stability of bupivacaine lipospheres with well- preserved release pattern and particle properties for further topical application.
Collapse
Affiliation(s)
- Sepehr Labanian
- Department of Pharmaceutics and Pharmaceutical Nanotechnology, School of Pharmacy, Iran University of Medical Sciences, Tehran, Iran
| | - Homa Faghihi
- Department of Pharmaceutics and Pharmaceutical Nanotechnology, School of Pharmacy, Iran University of Medical Sciences, Tehran, Iran.
| | - Hamed Montazeri
- Department of Pharmacognosy and Pharmaceutical Biotechnology, School of Pharmacy, Iran University of Medical Sciences, Tehran, Iran
| | - Aliakbar Jafarian
- Department of Anesthesiology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| |
Collapse
|
2
|
Zaki RM, Aldawsari MF, Alossaimi MA, Alzaid SF, Devanathadesikan Seshadri V, Almurshedi AS, Aldosari BN, Yusif RM, Sayed OM. Brain Targeting of Quetiapine Fumarate via Intranasal Delivery of Loaded Lipospheres: Fabrication, In-Vitro Evaluation, Optimization, and In-Vivo Assessment. Pharmaceuticals (Basel) 2022; 15:ph15091083. [PMID: 36145303 PMCID: PMC9501298 DOI: 10.3390/ph15091083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 08/15/2022] [Accepted: 08/26/2022] [Indexed: 11/16/2022] Open
Abstract
A liposphere system for intranasal delivery of quetiapine fumarate (QTF) was created to assess the potential for enhanced drug delivery. We investigated the effects of particle size, entrapment effectiveness, poly dispersibility index, and pluronic incorporation percentage on these variables. The optimal formula was examined using a TEM, and investigations into DSC, XRD, and FTIR were made. Optimized liposphere formulation in vitro dissolution investigation with a mean diameter of 294.4 ± 18.2 nm revealed about 80% drug release in 6 h. The intranasal injection of QTF-loaded lipospheres showed a shorter Tmax compared to that of intranasal and oral suspension, per the findings of an in vivo tissue distribution investigation in Wistar mice. Lipospheres were able to achieve higher drug transport efficiency (DTE %) and direct nose-to-brain drug transfer (DTP %). A potentially effective method for delivering QTF to specific brain regions is the liposphere system.
Collapse
Affiliation(s)
- Randa Mohammed Zaki
- Department of Pharmaceutics, College of Pharmacy, Prince Sattam Bin Abdulaziz University, P.O. Box 173, Al-Kharj 11942, Saudi Arabia
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Beni-Suef University, Beni-Suef P.O. Box 62514, Egypt
- Correspondence:
| | - Mohammed F. Aldawsari
- Department of Pharmaceutics, College of Pharmacy, Prince Sattam Bin Abdulaziz University, P.O. Box 173, Al-Kharj 11942, Saudi Arabia
| | - Manal A. Alossaimi
- Department of Pharmaceutical Chemistry, College of Pharmacy, Prince Sattam Bin Abdulaziz University, P.O. Box 173, Al-Kharj 11942, Saudi Arabia
| | - Shaikah F. Alzaid
- Department of Pharmaceutical Chemistry, College of Pharmacy, Prince Sattam Bin Abdulaziz University, P.O. Box 173, Al-Kharj 11942, Saudi Arabia
| | - Vidya Devanathadesikan Seshadri
- Department of Pharmacology and Toxicology, College of Pharmacy, Prince Sattam Bin Abdulaziz University, P.O. Box 173, Al-Kharj 11942, Saudi Arabia
| | - Alanood S. Almurshedi
- Department of Pharmaceutics, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
| | - Basmah Nasser Aldosari
- Department of Pharmaceutics, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
| | - Rehab Mohammad Yusif
- Department of Pharmaceutics, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt
- Department of Pharmaceutics and Pharmaceutical Technology, College of Pharmacy, Taibah University, Al-Madinah Al-Munawarah 41411, Saudi Arabia
| | - Ossama M. Sayed
- Department of Pharmaceutics, Faculty of Pharmacy, Sinai University-Kantara Branch, Ismailia 41612, Egypt
| |
Collapse
|
3
|
Nnamani PO, Ibezim EC, Adikwu MU, Attama AA. Sustained-Release Glibenclamide-Loaded Solid Lipid Microparticles from Micellar Solutions of Homolipids. J Pharm Innov 2021. [DOI: 10.1007/s12247-021-09554-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
4
|
Hu JW, Yen MW, Wang AJ, Chu IM. Effect of oil structure on cyclodextrin-based Pickering emulsions for bupivacaine topical application. Colloids Surf B Biointerfaces 2017; 161:51-58. [PMID: 29040834 DOI: 10.1016/j.colsurfb.2017.10.001] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Revised: 09/04/2017] [Accepted: 10/01/2017] [Indexed: 11/27/2022]
Abstract
Cyclodextrins (CDs) coupled with oils forms an insoluble inclusion complex that is able to adsorb to the interface between oils and aqueous phases; it thereby stabilizes Pickering emulsions. Three types of oils (triglyceride, linear chain oil, and ring-structured oil) were chosen to work with CDs to prepare bupivacaine (BPC)-encapsulated Pickering emulsions. We also investigated the relationship between oils and CDs; as well as their influences on stability, drug-releasing capability and skin permeability. Particle sizes and microstructures were determined by dynamic light scattering and scanning electron microscopy, respectively. In vitro drug release studies and in vitro skin permeation studies were evaluated by using Franz diffusion model. Particle sizes of all Pickering emulsions were larger than 1μm, and the morphology was spherical and covered with rough surfaces. BPC was released over an extended period, and the releasing ratios from Pickering emulsions were only 12.2%-23.1% after 48h. In skin permeation studies, compared with other formulations, a formula involved with ring-structured oil allowed the highest permeation amount through skin. However, after 24h of exposure, formulation operated with linear chain oil showed the highest skin-retaining amount. These results suggest that Pickering emulsions could regulate the target site of skin depending on various types of oil used.
Collapse
Affiliation(s)
- Jiun-Wen Hu
- Andros Pharmaceuticals Co., Ltd, Hsinchu County, 30261, Taiwan; Department of Chemical Engineering, National Tsing Hua University, Hsinchu City, 30013, Taiwan.
| | - Mei-Wen Yen
- Andros Pharmaceuticals Co., Ltd, Hsinchu County, 30261, Taiwan
| | - Ae-June Wang
- Andros Pharmaceuticals Co., Ltd, Hsinchu County, 30261, Taiwan
| | - I-Ming Chu
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu City, 30013, Taiwan
| |
Collapse
|
5
|
|
6
|
Santamaria CM, Woodruff A, Yang R, Kohane DS. Drug delivery systems for prolonged duration local anesthesia. MATERIALS TODAY (KIDLINGTON, ENGLAND) 2017; 20:22-31. [PMID: 28970739 PMCID: PMC5621744 DOI: 10.1016/j.mattod.2016.11.019] [Citation(s) in RCA: 75] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Numerous drug delivery systems have been applied to the problem of providing prolonged duration local anesthesia (PDLA). Here we review the rationale for PDLA, the desirable features for and important attributes of such systems, and specific examples that have been developed.
Collapse
Affiliation(s)
- Claudia M Santamaria
- Laboratory for Biomaterials and Drug Delivery, Division of Critical Care Medicine, Department of Anesthesiology, Boston Children's Hospital, Boston, Massachusetts, United States
| | - Alan Woodruff
- Laboratory for Biomaterials and Drug Delivery, Division of Critical Care Medicine, Department of Anesthesiology, Boston Children's Hospital, Boston, Massachusetts, United States
| | - Rong Yang
- Laboratory for Biomaterials and Drug Delivery, Division of Critical Care Medicine, Department of Anesthesiology, Boston Children's Hospital, Boston, Massachusetts, United States
| | - Daniel S Kohane
- Laboratory for Biomaterials and Drug Delivery, Division of Critical Care Medicine, Department of Anesthesiology, Boston Children's Hospital, Boston, Massachusetts, United States
| |
Collapse
|
7
|
Abstract
The use of biomaterials composed of organic pristine components has been successfully described in several purposes, such as tissue engineering and drug delivery. Drug delivery systems (DDS) have shown several advantages over traditional drug therapy, such as greater therapeutic efficacy, prolonged delivery profile, and reduced drug toxicity, as evidenced by in vitro and in vivo studies as well as clinical trials. Despite that, there is no perfect delivery carrier, and issues such as undesirable viscosity and physicochemical stability or inability to efficiently encapsulate hydrophilic/hydrophobic molecules still persist, limiting DDS applications. To overcome that, biohybrid systems, originating from the synergistic assembly of polymers and other organic materials such as proteins and lipids, have recently been described, yielding molecularly planned biohybrid systems that are able to optimize structures to easily interact with the targets. This work revised the biohybrid DDS clarifying their advantages, limitations, and future perspectives in an attempt to contribute to further research of innovative and safe biohybrid polymer-based system as biomaterials for the sustained release of active molecules.
Collapse
|
8
|
Zorzetto L, Brambilla P, Marcello E, Bloise N, De Gregori M, Cobianchi L, Peloso A, Allegri M, Visai L, Petrini P. From micro- to nanostructured implantable device for local anesthetic delivery. Int J Nanomedicine 2016; 11:2695-709. [PMID: 27354799 PMCID: PMC4907738 DOI: 10.2147/ijn.s99028] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Local anesthetics block the transmission of painful stimuli to the brain by acting on ion channels of nociceptor fibers, and find application in the management of acute and chronic pain. Despite the key role they play in modern medicine, their cardio and neurotoxicity (together with their short half-life) stress the need for developing implantable devices for tailored local drug release, with the aim of counterbalancing their side effects and prolonging their pharmacological activity. This review discusses the evolution of the physical forms of local anesthetic delivery systems during the past decades. Depending on the use of different biocompatible materials (degradable polyesters, thermosensitive hydrogels, and liposomes and hydrogels from natural polymers) and manufacturing processes, these systems can be classified as films or micro- or nanostructured devices. We analyze and summarize the production techniques according to this classification, focusing on their relative advantages and disadvantages. The most relevant trend reported in this work highlights the effort of moving from microstructured to nanostructured systems, with the aim of reaching a scale comparable to the biological environment. Improved intracellular penetration compared to microstructured systems, indeed, provides specific drug absorption into the targeted tissue and can lead to an enhancement of its bioavailability and retention time. Nanostructured systems are realized by the modification of existing manufacturing processes (interfacial deposition and nanoprecipitation for degradable polyester particles and high- or low-temperature homogenization for liposomes) or development of novel strategies (electrospun matrices and nanogels). The high surface-to-volume ratio that characterizes nanostructured devices often leads to a burst drug release. This drawback needs to be addressed to fully exploit the advantage of the interaction between the target tissues and the drug: possible strategies could involve specific binding between the drug and the material chosen for the device, and a multiscale approach to reach a tailored, prolonged drug release.
Collapse
Affiliation(s)
- Laura Zorzetto
- Department of Chemistry, Materials and Chemical Engineering 'G. Natta', Politecnico di Milano, Milan, Italy
| | - Paola Brambilla
- Department of Chemistry, Materials and Chemical Engineering 'G. Natta', Politecnico di Milano, Milan, Italy
| | - Elena Marcello
- Department of Chemistry, Materials and Chemical Engineering 'G. Natta', Politecnico di Milano, Milan, Italy
| | - Nora Bloise
- Department of Molecular Medicine, Centre for Health Technologies (CHT), INSTM UdR of Pavia, University of Pavia, Pavia, Italy
| | - Manuela De Gregori
- Pain Therapy Service, IRCCS Foundation Policlinico San Matteo Pavia, Pavia, Italy
| | - Lorenzo Cobianchi
- General Surgery Department, IRCCS Foundation Policlinico San Matteo, Pavia, Italy; Departments of Clinical, Surgical, Diagnostic and Pediatric Sciences, University of Pavia, Pavia, Italy
| | - Andrea Peloso
- General Surgery Department, IRCCS Foundation Policlinico San Matteo, Pavia, Italy; Departments of Clinical, Surgical, Diagnostic and Pediatric Sciences, University of Pavia, Pavia, Italy
| | - Massimo Allegri
- Department of Surgical Sciences, University of Parma, Parma, Italy
| | - Livia Visai
- Department of Molecular Medicine, Centre for Health Technologies (CHT), INSTM UdR of Pavia, University of Pavia, Pavia, Italy; Department of Occupational Medicine, Toxicology and Environmental Risks, S. Maugeri Foundation, IRCCS, Lab of Nanotechnology, Pavia, Italy
| | - Paola Petrini
- Department of Chemistry, Materials and Chemical Engineering 'G. Natta', Politecnico di Milano, Milan, Italy
| |
Collapse
|
9
|
Dudala TB, Yalavarthi PR, Vadlamudi HC, Thanniru J, Yaga G, Mudumala NL, Pasupati VK. A perspective overview on lipospheres as lipid carrier systems. Int J Pharm Investig 2014; 4:149-55. [PMID: 25426435 PMCID: PMC4241619 DOI: 10.4103/2230-973x.143112] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
Both hydrophilic and lipophilic therapeutics can be delivered successfully into deep and peripheral tissues such as cerebrospinal fluid and central nervous system by encapsulating them with crystalline lipids as lipospheres. The advent of lipospheres was meant to deliver both therapeutic moieties with enhanced efficacy and added stability to reach out intended tissue areas. Although extensive information is available on physicochemical, analytical and biopharmaceutical aspects of lipospheres, there was no specific order pertaining to critical composition and rationale of component selection available for academic and pilot scale processing of lipospheres. With the interest of compiling key points in a typical formulation of lipid lipospheres, this article was intrigued to discuss melt method, co-solvent, microemulsion, super critical fluid, spray drying and spray congealing techniques that were employed to scale up lipospheres. The selection criteria for both the drugs and lipids in liposphere formulations were demonstrated here. The quality assessment with variables like loading capacity and entrapment efficiency was explained. A note on preliminary screening factors to determine the liposphere formation such as liposphere dimensions with morphological scenario was detailed in this article. This article also includes the stability and storage issues with reference to photolysis. The marked differential in enhancing solubility and permeability characteristics of Class II and IV drug candidates by liposphere delivery systems with an evident of in vivo outcomes were emphasized.
Collapse
Affiliation(s)
- Thushara Bindu Dudala
- Pharmaceutics Division, Sree Vidyankethan College of Pharmacy, Tirupati, Andhra Pradesh, India
| | | | | | - Jyotsna Thanniru
- Pharmaceutics Division, Sree Vidyankethan College of Pharmacy, Tirupati, Andhra Pradesh, India
| | - Gowri Yaga
- Pharmaceutics Division, Sree Vidyankethan College of Pharmacy, Tirupati, Andhra Pradesh, India
| | - Naga Lakshmi Mudumala
- Pharmaceutics Division, Sree Vidyankethan College of Pharmacy, Tirupati, Andhra Pradesh, India
| | - Vivek Kumar Pasupati
- Pharmaceutics Division, Sree Vidyankethan College of Pharmacy, Tirupati, Andhra Pradesh, India
| |
Collapse
|
10
|
McAlvin JB, Kohane DS. Prolonged Duration Local Anesthesia. ADVANCES IN DELIVERY SCIENCE AND TECHNOLOGY 2014. [DOI: 10.1007/978-1-4614-9434-8_28] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
|
11
|
Lu L, Zhang W, Wu X, Wang X, Zhang M, Zhu Q, Ding X, Xu Z, Gao S, Gao J. A novel ropivacaine-loaded in situ forming implant prolongs the effect of local analgesia in rats. Arch Med Sci 2013; 9:614-21. [PMID: 24049519 PMCID: PMC3776163 DOI: 10.5114/aoms.2012.30829] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/16/2011] [Revised: 01/25/2012] [Accepted: 02/20/2012] [Indexed: 11/25/2022] Open
Abstract
INTRODUCTION Prolonged postoperative analgesia cannot be achieved by a single injection of local anesthetic solution. The objective of this study was to optimize the formulation of a ropivacaine hydrochloride (Ropi-HCl) loaded in situ forming implant (ISI) by addition of different co-solvents, and evaluate the in vitro release of Ropi-HCl, and the analgesic effect and toxicity of the optimized formulation in rats. MATERIAL AND METHODS Triacetin (TA), benzyl benzoate (BB) and polyethylene glycol 400 (PEG 400) were used as additives and added to the solvent of N-methyl-2-pyrrolidone (NMP). Drug release to the surface and inner structural properties of the formed implant were evaluated by scanning electron microscopy (SEM). The analgesic effect was determined by injection near the rat sciatic nerve. RESULTS The solvent system added with TA or BB significantly decreased the burst release, whereas PEG 400 increased the Ropi-HCl burst release from the formulation. Over 70% of the incorporated Ropi-HCl was released from all formulations in 14 days in the in vitro assay. The SEM showed that the surface of NMP-BB formulation was less porous and more homogeneous, compared with the other formulations. Compared with Ropi-HCl injection, the optimized formulation (NMP-BB) significantly prolonged the analgesic effect in 48 h (p < 0.05), with a mild degree of motor block from 3 h to 12 h. Histological evaluation of the injection site revealed only mild inflammatory infiltration without obvious pathological nerve alterations. CONCLUSIONS The biodegradable Ropi-HCl-loaded ISI system with NMP-BB may prove to be an attractive and safe alternative for the delivery of parenteral local anesthetics to prolong pain relief.
Collapse
Affiliation(s)
- Lei Lu
- Department of Pharmaceutics, Changhai Hospital, Second Military Medical University, Shanghai, PR China
- Department of Pharmaceutics, PLA No. 323 Hospital, Xi'an, Shaanxi, PR China
| | - Wei Zhang
- Department of Pharmaceutics, Changhai Hospital, Second Military Medical University, Shanghai, PR China
- Department of Pharmaceutics, PLA No. 522 Hospital, Luoyang, Henan, PR China
| | - Xin Wu
- Department of Pharmaceutics, Changhai Hospital, Second Military Medical University, Shanghai, PR China
| | - Xiaoyu Wang
- Department of Pharmaceutics, Changhai Hospital, Second Military Medical University, Shanghai, PR China
| | - Min Zhang
- Department of Pharmaceutics, Changhai Hospital, Second Military Medical University, Shanghai, PR China
| | - Quangang Zhu
- Department of Pharmaceutics, Changhai Hospital, Second Military Medical University, Shanghai, PR China
| | - Xueying Ding
- Department of Pharmaceutics, School of Pharmacy, Second Military Medical University, Shanghai, PR China
| | - Zhiyun Xu
- Department of Thoracic-Cardio Surgery, Changhai Hospital, Second Military Medical University, Shanghai, PR China
| | - Shen Gao
- Department of Pharmaceutics, Changhai Hospital, Second Military Medical University, Shanghai, PR China
| | - Jing Gao
- Department of Pharmaceutics, School of Pharmacy, Second Military Medical University, Shanghai, PR China
| |
Collapse
|
12
|
Absar S, Nahar K, Kwon YM, Ahsan F. Thrombus-targeted nanocarrier attenuates bleeding complications associated with conventional thrombolytic therapy. Pharm Res 2013; 30:1663-76. [PMID: 23468049 DOI: 10.1007/s11095-013-1011-x] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2013] [Accepted: 02/11/2013] [Indexed: 11/29/2022]
Abstract
PURPOSE To test the hypothesis that thrombus-specific tissue plasminogen activator (tPA)-loaded nanocarriers enhance thrombolytic efficacy and attenuate hemorrhagic complications. METHODS A series of pegylated and non-pegylated tPA-loaded liposomes were prepared and their surfaces were decorated with the peptide sequence (CQQHHLGGAKQAGDV) of fibrinogen gamma-chain that binds with GPIIb/IIIa expressed on activated platelets. All formulations were characterized for physical properties, stability and in vitro release profile. The thrombolytic activities of tPA-loaded liposomes were tested by visual end-point detection, fibrin agar-plate and human blood clot-lysis assays. The thrombus-specificity of the peptide-modified-liposomes was evaluated by studying the binding of fluorescent peptide-liposomes with activated platelets. The pharmacokinetic profile and thrombolytic efficacy were evaluated in healthy rats and an inferior vena-cava rat model of thrombosis, respectively. RESULTS Both pegylated and non-pegylated peptide-modified-liposomes showed favorable physical characteristics and colloidal stability. Formulations exhibited an initial burst release (40-50% in 30 min) followed by a continuous release of tPA (80-90% in 24 h) in vitro. Encapsulated tPA retained >90% fibrinolytic activity as compared to that of native tPA. Peptide-grafted-liposomes containing tPA demonstrated an affinity to bind with activated platelets. The half-life of tPA was extended from 7 to 103 and 141 min for non-pegylated and pegylated liposomes, respectively. Compared to native tPA, liposomal-tPA caused a 35% increase in clot-lysis, but produced a 4.3-fold less depletion of circulating fibrinogen. CONCLUSIONS tPA-loaded homing-peptide-grafted-liposomes demonstrate enhanced thrombolytic activity with reduced hemorrhagic risk.
Collapse
Affiliation(s)
- Shahriar Absar
- Department of Pharmaceutical Sciences, Texas Tech University Health Sciences Center, 1300 Coulter St., Amarillo, Texas 79106, USA
| | | | | | | |
Collapse
|
13
|
Zaki Rizkalla CM, latif Aziz R, Ibrahim Soliman I. Microencapsulation of hydroxyzine HCl by thermal phase separation: in vitro release enhancement and in vivo pharmacodynamic evaluation. Pharm Dev Technol 2012; 18:196-209. [DOI: 10.3109/10837450.2012.693506] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|
14
|
Zaki Rizkalla CM, latif Aziz R, Soliman II. In vitro and in vivo evaluation of hydroxyzine hydrochloride microsponges for topical delivery. AAPS PharmSciTech 2011; 12:989-1001. [PMID: 21800216 DOI: 10.1208/s12249-011-9663-5] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2011] [Accepted: 06/30/2011] [Indexed: 11/30/2022] Open
Abstract
Hydroxyzine HCl is used in oral formulations for the treatment of urticaria and atopic dermatitis. Dizziness, blurred vision, and anticholinergic responses, represent the most common side effects. It has been shown that controlled release of the drug from a delivery system to the skin could reduce the side effects while reducing percutaneous absorption. Therefore, the aim of the present study was to produce an effective drug-loaded dosage form that is able to control the release of hydroxyzine hydrochloride into the skin. The Microsponge Delivery System is a unique technology for the controlled release of topical agents, and it consists of porous polymeric microspheres, typically 10-50 μm in diameter, loaded with active agents. Eudragit RS-100 microsponges of the drug were prepared by the oil in an oil emulsion solvent diffusion method using acetone as dispersing solvent and liquid paraffin as the continuous medium. Magnesium stearate was added to the dispersed phase to prevent flocculation of Eudragit RS-100 microsponges. Pore inducers such as sucrose and pregelatinized starch were used to enhance the rate of drug release. Microsponges of nearly 98% encapsulation efficiency and 60-70% porosity were produced. The pharmacodynamic effect of the chosen preparation was tested on the shaved back of histamine-sensitized rabbits. Histopathological studies were driven for the detection of the healing of inflamed tissues.
Collapse
|
15
|
Nnamani P, Attama A, Ibezim E, Adikwu M. SRMS142-based solid lipid microparticles: Application in oral delivery of glibenclamide to diabetic rats. Eur J Pharm Biopharm 2010; 76:68-74. [DOI: 10.1016/j.ejpb.2010.06.002] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2009] [Revised: 05/20/2010] [Accepted: 06/01/2010] [Indexed: 10/19/2022]
|
16
|
Weiniger CF, Golovanevski M, Sokolsky-Papkov M, Domb AJ. Review of prolonged local anesthetic action. Expert Opin Drug Deliv 2010; 7:737-52. [PMID: 20408748 DOI: 10.1517/17425241003767383] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
IMPORTANCE OF THE FIELD Pain following surgery is often treated by local anesthetic agents. Duration of the analgesia can be extended safely following administration of encapsulated large doses of local anesthetic agents. AREAS COVERED IN THIS REVIEW This review considers formulations used for encapsulation of local anesthetic agents for prolonged anesthesia effect. All studies describing encapsulation of a commercial local anesthetic agent for providing prolonged analgesia were considered using the NCBI Medline site. of local anesthetic, prolonged anesthesia, polymers and liposomes were entered in order to retrieve appropriate articles and reviews from 1966 to 2010, with emphasis on the last 10 years. Reference pages were searched manually for other relevant articles. The topics covered include an overview of local anesthetic agents and a review of local anesthetic carrier agents, with emphasis on liposomes and polymer carriers. Articles were limited to the English language. WHAT THE READER WILL GAIN The current research areas for prolongation of local anesthetic effect are evaluated, along with their limitations. Each topic has been summarized, and the review has attempted to cover all current laboratory and clinical studies in a simple manner that should also be useful for readers without a pharmacology background. The direction of research is promising and exciting, and this review should be a useful up-to-date reference. TAKE HOME MESSAGE Many formulations including polymer and liposome carriers have facilitated prolonged local anesthetic action for several days, although few clinical studies have been performed. This field promises a safe way to deliver local anesthetics for effect far beyond that of commercially available agents, with potential cost and health benefits for patients suffering chronic or postoperative pain.
Collapse
Affiliation(s)
- Carolyn F Weiniger
- Hadassah Hebrew University Medical Center, Department of Anesthesiology and Critical Care Medicine, Jerusalem, POB 12000, Israel.
| | | | | | | |
Collapse
|
17
|
The use of PEGylated liposomes to prolong circulation lifetimes of tissue plasminogen activator. Biomaterials 2009; 30:5751-6. [PMID: 19656559 DOI: 10.1016/j.biomaterials.2009.07.021] [Citation(s) in RCA: 127] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2009] [Accepted: 07/11/2009] [Indexed: 11/22/2022]
Abstract
Tissue plasminogen activator (tPA), a widely used thrombolytic agent, has an application limit due to short half-life. To prolong the half-life of tPA, liposomes composed of egg phosphatidylcholine (EPC), cholesterol (CHOL) and sodium cholesterol-3-sulfate (CS) were prepared by lipid film method. In addition, distearolyphosphatidyl ethanolamine-N-poly(ethylene glycol) 2000 (DSPE-PEG 2000) was included to give steric barrier to liposomes. Physicochemical characteristics such as particle size, zeta potential, entrapment efficiency and long-term storage stability at 4 degrees C were investigated. The fibrinolytic activity of tPA-loaded in liposomes was confirmed by fibrin clot lysis assay. In vivo pharmacokinetic properties of tPA and the effect of PEG on the blood circulation of tPA-loaded in liposomes in circulation were also evaluated. Both conventional liposomes (EPCL) and PEGylated liposomes (EPC-PEGL) were proper as an injectable formulation with small particle size. Loading process of tPA into liposomes did not alter fibrinolytic activity of intact tPA. Encapsulation of tPA into EPCL and EPC-PEGL prolonged half-life of tPA by 16 and 21 folds compared with free tPA, respectively. Therefore, the use of liposomes could prolong the circulation lifetimes and longevity effect of liposomes on tPA was increased by PEG.
Collapse
|
18
|
Fabbri E, Borgatti M, Manaresi N, Medoro G, Nastruzzi C, Di Croce S, Tosi A, Mazzitelli S, Mancini I, Guerrieri R, Gambari R. Levitation and movement of tripalmitin‐based cationic lipospheres on a dielectrophoresis‐based lab‐on‐a‐chip device. J Appl Polym Sci 2008. [DOI: 10.1002/app.28413] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
19
|
Nasr M, Mansour S, Mortada ND, El Shamy AA. Lipospheres as carriers for topical delivery of aceclofenac: preparation, characterization and in vivo evaluation. AAPS PharmSciTech 2008; 9:154-62. [PMID: 18446476 DOI: 10.1208/s12249-007-9028-2] [Citation(s) in RCA: 76] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2007] [Accepted: 11/08/2007] [Indexed: 11/30/2022] Open
Abstract
The purpose of this study was to prepare lipospheres containing aceclofenac intended for topical skin delivery with the aim of exploiting the favorable properties of this carrier system and developing a sustained release formula to overcome the side effects resulting from aceclofenac oral administration. Lipospheres were prepared using different lipid cores and phospholipid coats adopting melt and solvent techniques. Characterization was carried out through photomicroscopy, scanning electron microscopy, particle size analysis, DSC, In vitro drug release and storage study. The anti-inflammatory effect of liposphere systems was assessed by the rat paw edema technique and compared to the marketed product. Results revealed that liposphere systems were able to entrap aceclofenac at very high levels (93.1%). The particle size of liposphere systems was well suited for topical drug delivery. DSC revealed the molecular dispersion of aceclofenac when incorporated in lipospheres. Both entrapment efficiency and release were affected by the technique of preparation, core and coat types, core to coat ratio and drug loading. Lipospheres were very stable after 3 months storage at 2-8 degrees C manifested by low leakage rate (less than 7%) and no major changes in particle size. Finally, liposphere systems were found to possess superior anti-inflammatory activity compared to the marketed product in both lotion and paste consistencies. Liposphere systems proved to be a promising topical system for the delivery of aceclofenac as they possessed the ability to entrap the drug at very high levels and high stability, and to sustain the anti-inflammatory effect of the drug.
Collapse
|
20
|
Troutier AL, Ladavière C. An overview of lipid membrane supported by colloidal particles. Adv Colloid Interface Sci 2007; 133:1-21. [PMID: 17397791 DOI: 10.1016/j.cis.2007.02.003] [Citation(s) in RCA: 129] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2006] [Revised: 01/29/2007] [Accepted: 02/19/2007] [Indexed: 12/30/2022]
Abstract
In recent years, original hybrid assemblies composed of a particle core surrounded by a lipid shell emerged as promising entities for various biotechnological applications. Their broadened bio-potentialities, ranging from model membrane systems or biomolecule screening supports, to substance delivery reservoirs or therapeutic vectors, are furthered by their versatility of composition due to the possible wide variation in the particle nature and size, as well as in the lipid formulation. The synthesis, the characteristics, and the uses of these Lipid/Particle assemblies encountered in the literature so far are reviewed, and classified according to the spherical core size in order to highlight general trends. Moreover, several criteria are particularly discussed: i) the interactions involved between the particles and the lipids, and implicitly the assembly elaboration mechanism, ii) the most suited techniques for an accurate characterization of the entities from structural and physicochemical points of view, and iii) the remarkable properties of the solid-supported lipid membrane obtained.
Collapse
Affiliation(s)
- Anne-Lise Troutier
- Laboratoire des Matériaux Inorganiques, UMR 6002-CNRS, Université Blaise Pascal, 24 avenue des Landais, 63177 Aubière Cedex, France
| | | |
Collapse
|
21
|
Pietkiewicz J, Sznitowska M, Placzek M. The expulsion of lipophilic drugs from the cores of solid lipid microspheres in diluted suspensions and in concentrates. Int J Pharm 2006; 310:64-71. [PMID: 16413712 DOI: 10.1016/j.ijpharm.2005.11.038] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2005] [Revised: 09/22/2005] [Accepted: 11/07/2005] [Indexed: 11/19/2022]
Abstract
The aim of the study was to compare incorporation of bupivacaine base, bupivacaine stearate and indomethacin in diluted suspensions of lipospheres (10%, w/w of lipid) and in concentrates (50%, w/w of lipid). The lipid cores were composed of a mixture of solid and liquid triglycerides (Precirol and Miglyol 4:1). The lipospheres sizing between 0.5-10 microm (suspensions) and 0.5-20 microm (concentrates) were prepared using a hot emulsification with high-shear mixing and cold resolidification method. None of the studied drugs was successfully incorporated in the lipid core. The increased incorporation of drugs determined in the concentrated lipospheres was only apparent, since in fact all the dose was only attached to the surface of the lipid particles and was transferred to the aqueous phase in the course of an intensive agitation. The presence of hydrophilic polymers in the aqueous phase did not prevent the expulsion effect although drug precipitation was retarded. The expulsion effect did not correlate with the solubility of drugs determined in the bulk lipids.
Collapse
Affiliation(s)
- Justyna Pietkiewicz
- Department of Pharmaceutical Technology, Medical University of Gdansk, ul. Hallera 107, Gdansk 80-416, Poland
| | | | | |
Collapse
|
22
|
Shi Y, Li LC. Current advances in sustained-release systems for parenteral drug delivery. Expert Opin Drug Deliv 2005; 2:1039-58. [PMID: 16296808 DOI: 10.1517/17425247.2.6.1039] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Major progresses in the development of parenteral sustained-release systems have been made in recent years as evidenced by the regulatory approval and market launch of several new products. Both the availability of novel carrier materials and the advances in method of fabrication have contributed to these commercial successes. With the formulation challenges associated with biologics, new delivery systems have also been evolved specifically to address the unmet needs in the parenteral sustained release of proteins. In this review paper, different new carriers systems and preparation methods are discussed with special focus on their applications to biologicals.
Collapse
Affiliation(s)
- Yi Shi
- Abbott Laboratories, Global Pharmaceutical Research & Development, Abbott Park, IL 60064, USA
| | | |
Collapse
|