1
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Islam MS, Mitra S. Microwave Synthesis of Nanostructured Functionalized Polylactic Acid (nfPLA) for Incorporation Into a Drug Crystals to Enhance Their Dissolution. J Pharm Sci 2023; 112:2260-2266. [PMID: 36958690 DOI: 10.1016/j.xphs.2023.03.011] [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: 01/12/2023] [Revised: 03/15/2023] [Accepted: 03/15/2023] [Indexed: 03/25/2023]
Abstract
Active pharmaceutical ingredients that have low aqueous solubility pose a challenge in the field of drug delivery. In this paper we report for the first time the synthesis of nano-structured, hydrophilized polylactic acid (nfPLA) and its application in the delivery of low solubility drugs. Microwave induced acid oxidation was used to generate nfPLA where the oxygen concentration increased from 27.0 percent to 41.0 percent. Also, the original non dispersible PLA was converted to a relatively dispersible form with an average particle size of 131.4 nm and a zeta potential of -23.3 mV. Small quantities of the nfPLA were incorporated into the crystals (0.5 to 2.0 % by weight) of a highly hydrophobic, low solubility antifungal drug Griseofulvin (GF) to form a composite (GF-nfPLA). An antisolvent approach was used for the synthesis of the drug composite. SEM and Raman imaging showed non-uniform distribution of the nfPLA on the crystal surface. The solubility of GF increased from 8.89 µg/mL to as high as 49.67 µg/mL for the GF-nfPLA. At the same time zeta potential changed from -15.4 mV to -39.0 mV, therefore the latter was a relatively stable colloid. Octanol-water partitioning also showed a similar effect as logP reduced from 2.16 for pure GF to 0.55 for GF-nfPLA. In vitro dissolution testing showed six times higher aqueous solubility of GF-nfPLA compared to pure GF. The time for 50 (T50) and 80 % (T80) dissolution reduced significantly for the nfPLA composites; T50 reduced from 40.0 to 14.0 min and T80 reduced form unachievable to 47.0 min. Overall, the PLA which is an FDA approved, bioabsorbable polymer can be used to enhance the dissolution of hydrophobic pharmaceuticals and this can lead to higher efficacy and lower the required dosage for drugs.
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Affiliation(s)
- Mohammad Saiful Islam
- Department of Chemistry and Environmental Science, New Jersey Institute of Technology, Newark, NJ, 07102, USA
| | - Somenath Mitra
- Department of Chemistry and Environmental Science, New Jersey Institute of Technology, Newark, NJ, 07102, USA.
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2
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Fu H, Yaniv V, Betzalel Y, Mamane H, Gray KA. Creating anti-viral high-touch surfaces using photocatalytic transparent films. CHEMOSPHERE 2023; 323:138280. [PMID: 36868422 DOI: 10.1016/j.chemosphere.2023.138280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2023] [Revised: 02/27/2023] [Accepted: 02/28/2023] [Indexed: 06/18/2023]
Abstract
Antimicrobial and self-cleaning surface coatings are promising tools to combat the growing global threat of infectious diseases and related healthcare-associated infections (HAIs). Although many engineered TiO2-based coating technologies are reporting antibacterial performance, the antiviral performance of these coatings has not been explored. Furthermore, previous studies have underscored the importance of the "transparency" of the coating for surfaces such as the touch screens of medical devices. Hence, in this study, we fabricated a variety of nanoscale TiO2-based transparent thin films (anatase TiO2, anatase/rutile mixed phase TiO2, silver-anatase TiO2 composite, and carbon nanotube-anatase TiO2 composite) via dipping and airbrush spray coating technologies and evaluated their antiviral performance (Bacteriophage MS2 as the model) under dark and illuminated conditions. The thin films showed high surface coverage (ranging from 40 to 85%), low surface roughness (maximum average roughness 70 nm), super-hydrophilicity (water contact angle 6-38.4°), and high transparency (70-80% transmittance under visible light). Antiviral performance of the coatings revealed that silver-anatase TiO2 composite (nAg/nTiO2) coated samples achieved the highest antiviral efficacy (5-6 log reduction) while the other TiO2 coated samples showed fair antiviral results (1.5-3.5 log reduction) after 90 min LED irradiation at 365 nm. Those findings indicate that TiO2-based composite coatings are effective in creating antiviral high-touch surfaces with the potential to control infectious diseases and HAIs.
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Affiliation(s)
- Han Fu
- Department of Civil and Environmental Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Vered Yaniv
- Water Technologies Laboratory, Faculty of Engineering, Tel Aviv University, Tel Aviv, 69978, Israel
| | - Yifaat Betzalel
- Water Technologies Laboratory, Faculty of Engineering, Tel Aviv University, Tel Aviv, 69978, Israel
| | - Hadas Mamane
- School of Mechanical Engineering, Faculty of Engineering, Tel-Aviv University, Tel Aviv, 69978, Israel.
| | - Kimberly A Gray
- Department of Civil and Environmental Engineering, Northwestern University, Evanston, IL, 60208, USA.
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3
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Kumari L, Choudhari Y, Patel P, Gupta GD, Singh D, Rosenholm JM, Bansal KK, Kurmi BD. Advancement in Solubilization Approaches: A Step towards Bioavailability Enhancement of Poorly Soluble Drugs. Life (Basel) 2023; 13:life13051099. [PMID: 37240744 DOI: 10.3390/life13051099] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Revised: 04/20/2023] [Accepted: 04/25/2023] [Indexed: 05/28/2023] Open
Abstract
A drug's aqueous solubility is defined as the ability to dissolve in a particular solvent, and it is currently a major hurdle in bringing new drug molecules to the market. According to some estimates, up to 40% of commercialized products and 70-90% of drug candidates in the development stage are poorly soluble, which results in low bioavailability, diminished therapeutic effects, and dosage escalation. Because of this, solubility must be taken into consideration when developing and fabricating pharmaceutical products. To date, a number of approaches have been investigated to address the problem of poor solubility. This review article attempts to summarize several conventional methods utilized to increase the solubility of poorly soluble drugs. These methods include the principles of physical and chemical approaches such as particle size reduction, solid dispersion, supercritical fluid technology, cryogenic technology, inclusion complex formation techniques, and floating granules. It includes structural modification (i.e., prodrug, salt formation, co-crystallization, use of co-solvents, hydrotrophy, polymorphs, amorphous solid dispersions, and pH variation). Various nanotechnological approaches such as liposomes, nanoparticles, dendrimers, micelles, metal organic frameworks, nanogels, nanoemulsions, nanosuspension, carbon nanotubes, and so forth have also been widely investigated for solubility enhancement. All these approaches have brought forward the enhancement of the bioavailability of orally administered drugs by improving the solubility of poorly water-soluble drugs. However, the solubility issues have not been completely resolved, owing to several challenges associated with current approaches, such as reproducibility in large scale production. Considering that there is no universal approach for solving solubility issues, more research is needed to simplify the existing technologies, which could increase the number of commercially available products employing these techniques.
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Affiliation(s)
- Lakshmi Kumari
- Department of Pharmaceutics, ISF College of Pharmacy, GT Road, Moga 142001, Punjab, India
| | - Yash Choudhari
- Department of Pharmaceutics, ISF College of Pharmacy, GT Road, Moga 142001, Punjab, India
| | - Preeti Patel
- Department of Pharmaceutical Chemistry, ISF College of Pharmacy, GT Road, Moga 142001, Punjab, India
| | - Ghanshyam Das Gupta
- Department of Pharmaceutics, ISF College of Pharmacy, GT Road, Moga 142001, Punjab, India
| | - Dilpreet Singh
- Department of Pharmaceutics, ISF College of Pharmacy, GT Road, Moga 142001, Punjab, India
| | - Jessica M Rosenholm
- Pharmaceutical Sciences Laboratory, Faculty of Science and Engineering, Åbo Akademi University, 20520 Turku, Finland
| | - Kuldeep Kumar Bansal
- Pharmaceutical Sciences Laboratory, Faculty of Science and Engineering, Åbo Akademi University, 20520 Turku, Finland
| | - Balak Das Kurmi
- Department of Pharmaceutics, ISF College of Pharmacy, GT Road, Moga 142001, Punjab, India
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4
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Islam MS, Mitra S. Synthesis of Microwave Functionalized, Nanostructured Polylactic Co-Glycolic Acid ( nfPLGA) for Incorporation into Hydrophobic Dexamethasone to Enhance Dissolution. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:943. [PMID: 36903820 PMCID: PMC10005067 DOI: 10.3390/nano13050943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 02/25/2023] [Accepted: 03/03/2023] [Indexed: 06/18/2023]
Abstract
The low solubility and slow dissolution of hydrophobic drugs is a major challenge for the pharmaceutical industry. In this paper, we present the synthesis of surface-functionalized poly(lactic-co-glycolic acid) (PLGA) nanoparticles for incorporation into corticosteroid dexamethasone to improve its in vitro dissolution profile. The PLGA crystals were mixed with a strong acid mixture, and their microwave-assisted reaction led to a high degree of oxidation. The resulting nanostructured, functionalized PLGA (nfPLGA), was quite water-dispersible compared to the original PLGA, which was non-dispersible. SEM-EDS analysis showed 53% surface oxygen concentration in the nfPLGA compared to the original PLGA, which had only 25%. The nfPLGA was incorporated into dexamethasone (DXM) crystals via antisolvent precipitation. Based on SEM, RAMAN, XRD, TGA and DSC measurements, the nfPLGA-incorporated composites retained their original crystal structures and polymorphs. The solubility of DXM after nfPLGA incorporation (DXM-nfPLGA) increased from 6.21 mg/L to as high as 87.1 mg/L and formed a relatively stable suspension with a zeta potential of -44.3 mV. Octanol-water partitioning also showed a similar trend as the logP reduced from 1.96 for pure DXM to 0.24 for DXM-nfPLGA. In vitro dissolution testing showed 14.0 times higher aqueous dissolution of DXM-nfPLGA compared to pure DXM. The time for 50% (T50) and 80% (T80) of gastro medium dissolution decreased significantly for the nfPLGA composites; T50 reduced from 57.0 to 18.0 min and T80 reduced from unachievable to 35.0 min. Overall, the PLGA, which is an FDA-approved, bioabsorbable polymer, can be used to enhance the dissolution of hydrophobic pharmaceuticals and this can lead to higher efficacy and lower required dosage.
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5
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Zhu G, Huang Z, Zhao L, Tu Y. Unexpected spontaneous dynamic oxygen migration on carbon nanotubes. NANOSCALE 2021; 13:15231-15237. [PMID: 34553730 DOI: 10.1039/d1nr03251h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Combining density functional theory (DFT) calculations and ab initio molecular dynamics (AIMD) simulations, we show that oxygen functional groups exhibit unexpected spontaneous dynamic behaviors on the interior surface of single-walled carbon nanotubes (SWCNTs). The hydroxyl and epoxy migrations are achieved by the C-O bond breaking/reforming reactions or the proton transfer reaction between the neighboring epoxy and hydroxyl groups. It is demonstrated that the spontaneous dynamic characteristic is attributed to the sharply reduced energy barrier less than or comparable to thermal fluctuations. We also observe a stable intermediate state with a dangling C-O bond, which permits the successive migration of the oxygen functional groups. However, on the exterior surface of SWCNTs, it is difficult for the oxygen groups to migrate spontaneously because there are relatively high energy barriers, and the dangling C-O bond prefers to transform into the more stable epoxy configuration. The spontaneous oxygen migration is further confirmed by the oxygen migration process using DFT calculations and AIMD simulations at room temperature. Our work provides a new understanding of the behavior of oxygen functional groups at interfaces and gives a potential route to design new carbon-based dynamic materials.
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Affiliation(s)
- Guangdong Zhu
- College of Physical Science and Technology, Yangzhou University, Jiangsu, 225009, China.
| | - Zhijing Huang
- College of Physical Science and Technology, Yangzhou University, Jiangsu, 225009, China.
| | - Liang Zhao
- College of Physical Science and Technology, Yangzhou University, Jiangsu, 225009, China.
| | - Yusong Tu
- College of Physical Science and Technology, Yangzhou University, Jiangsu, 225009, China.
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Au-O-MWCNTs and TiO2-O-MWCNTs as Efficient Nanocarriers for Dexamethasone: Adsorption Isotherms and Kinetic Studies. INTERNATIONAL JOURNAL OF CHEMICAL ENGINEERING 2021. [DOI: 10.1155/2021/2040363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
In this research, the fabrication of drug delivery systems based on oxidized multiwall carbon nanotubes (O-MWCNTs) was studied. Herein, TiO2 and Au were conjugated with O-MWCNTs to prepare efficient nanocarriers for dexamethasone (dex). The samples were characterized by Fourier transform infrared (FTIR), scanning electron microscopy (SEM), and X-ray diffraction (XRD). In addition, dex loading was studied using adsorption isotherms including Langmuir, Freundlich, Temkin, and Dubinin–Radushkevich. The results show that dex adsorption agreed well with the Freundlich isotherm. Increasing the TiO2 to O-MWCNT ratio from (1 : 4) to (1 : 2) can improve the adsorption capacity from
to 320
. The increasing Au amount increases the adsorption capacity from
(SA1) to maximum
(SA6). The maximum equilibrium binding energy
was obtained for SA2, and SA7 shows high binding strength between dex and the nanoadsorbent. Carbon nanotubes (CNTs) show good affinity with high loading capabilities for dexamethasone adsorption. The synthesized TiO2-O-MWCNTs:1/2 with the maximum removal percent (80%) was proposed as an appropriate nanocarrier for dexamethasone. Pseudo-first order, pseudo-second order, Elovich, and intraparticle diffusion models were investigated for all synthesized drug nanocarriers. According to regression coefficients, experimental data are in good agreement with the pseudo-second order model for all adsorbents except O-MWCNT/CTAB. Experimental results revealed that the Elovich model could account for the O-MWCNT/CTAB adsorbent.
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7
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Debnath SK, Srivastava R. Drug Delivery With Carbon-Based Nanomaterials as Versatile Nanocarriers: Progress and Prospects. FRONTIERS IN NANOTECHNOLOGY 2021. [DOI: 10.3389/fnano.2021.644564] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
With growing interest, a large number of researches have been conducted on carbon-based nanomaterials (CBNs). However, their uses are limited due to comprehensive potential environmental and human health effects. It is often confusing for researchers to make an informed choice regarding the versatile carbon-based nanocarrier system and its potential applications. This review has highlighted emerging applications and cutting-edge progress of CBNs in drug delivery. Some critical factors like enzymatic degradation, surface modification, biological interactions, and bio-corona have been discussed here. These factors will help to fabricate CBNs for effective drug delivery. This review also addresses recent advancements in carbon-based target specific and release controlled drug delivery to improve disease treatment. The scientific community has turned their research efforts into the development of novel production methods of CBNs to make their production more attractive to the industrial sector. Due to the nanosize and diversified physical properties, these CBNs have demonstrated distinct biological interaction. Thus long-term preclinical toxicity study is recommended before finally translating to clinical application.
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8
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Islam MS, Renner F, Foster K, Oderinde MS, Stefanski K, Mitra S. Hydrophilic and Functionalized Nanographene Oxide Incorporated Faster Dissolving Megestrol Acetate. Molecules 2021; 26:molecules26071972. [PMID: 33807401 PMCID: PMC8036621 DOI: 10.3390/molecules26071972] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Accepted: 03/26/2021] [Indexed: 11/16/2022] Open
Abstract
The aim of this work is to present an approach to enhance the dissolution of progestin medication, megestrol acetate (also known as MEGACE), for improving the dissolution rate and kinetic solubility by incorporating nano graphene oxide (nGO). An antisolvent precipitation process was investigated for nGO-drug composite preparation, where prepared composites showed crystalline properties that were similar to the pure drug but enhanced aqueous dispersibility and colloidal stability. To validate the efficient release profile of composite, in vitro dissolution testing was carried out using United States Pharmacopeia, USP-42 paddle method, with gastric pH (1.4) and intestinal pH (6.5) solutions to mimic in vivo conditions. Pure MA is practically insoluble (2 µg/mL at 37 °C). With the incorporation of nGO, it was possible to dissolve nearly 100% in the assay. With the incorporation of 1.0% of nGO, the time required to dissolve 50% and 80% of drug, namely T50 and T80, decreased from 138.0 min to 27.0 min, and the drug did not dissolve for 97.0 min in gastric media, respectively. Additionally, studies done in intestinal media have revealed T50 did not dissolve for 92.0 min. This work shows promise in incorporating functionalized nanoparticles into the crystal lattice of poorly soluble drugs to improve dissolution rate.
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Affiliation(s)
- Mohammad Saiful Islam
- Department of Chemistry and Environmental Science, New Jersey Institute of Technology, Newark, NJ 07102, USA; (M.S.I.); (F.R.)
| | - Faradae Renner
- Department of Chemistry and Environmental Science, New Jersey Institute of Technology, Newark, NJ 07102, USA; (M.S.I.); (F.R.)
- Bristol Myers Squibb Research and Early Development, Princeton, NJ 08543, USA; (K.F.); (M.S.O.); (K.S.)
| | - Kimberly Foster
- Bristol Myers Squibb Research and Early Development, Princeton, NJ 08543, USA; (K.F.); (M.S.O.); (K.S.)
| | - Martin S. Oderinde
- Bristol Myers Squibb Research and Early Development, Princeton, NJ 08543, USA; (K.F.); (M.S.O.); (K.S.)
| | - Kevin Stefanski
- Bristol Myers Squibb Research and Early Development, Princeton, NJ 08543, USA; (K.F.); (M.S.O.); (K.S.)
| | - Somenath Mitra
- Department of Chemistry and Environmental Science, New Jersey Institute of Technology, Newark, NJ 07102, USA; (M.S.I.); (F.R.)
- Correspondence:
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9
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Alatorre-Barajas JA, Alcántar-Zavala E, Gil-Rivas MG, Estrada-Zavala E, Ochoa-Terán A, Gochi-Ponce Y, Montes-Ávila J, Cabrera A, Trujillo-Navarrete B, Rivera-Lugo YY, Alonso-Núñez G, Reynoso-Soto EA, Medina-Franco JL. Synthesis of covalent bonding MWCNT-oligoethylene linezolid conjugates and their antibacterial activity against bacterial strains. RSC Adv 2021; 11:28912-28924. [PMID: 35478546 PMCID: PMC9038137 DOI: 10.1039/d1ra04691h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Accepted: 08/24/2021] [Indexed: 01/18/2023] Open
Abstract
Nowadays, infectious diseases caused by drug-resistant bacteria have become especially important. Linezolid is an antibacterial drug active against clinically important Gram positive strains; however, resistance showed by these bacteria has been reported. Nanotechnology has improved a broad area of science, such as medicine, developing new drug delivery and transport systems. In this work, several covalently bounded conjugated nanomaterials were synthesized from multiwalled carbon nanotubes (MWCNTs), a different length oligoethylene chain (Sn), and two linezolid precursors (4 and 7), and they were evaluated in antibacterial assays. Interestingly, due to the intrinsic antibacterial activity of the amino-oligoethylene linezolid analogues, these conjugated nanomaterials showed significant antibacterial activity against various tested bacterial strains in a radial diffusion assay and microdilution method, including Gram negative strains as Escherichia coli (11 mm, 6.25 μg mL−1) and Salmonella typhi (14 mm, ≤0.78 μg mL−1), which are not inhibited by linezolid. The results show a significant effect of the oligoethylene chain length over the antibacterial activity. Molecular docking of amino-oligoethylene linezolid analogs shows a more favorable interaction of the S2-7 analog in the PTC of E. coli. New MWCNTs amino-oligoethylene linezolid conjugates having outstanding activity against Gram negative strains.![]()
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Affiliation(s)
- José A. Alatorre-Barajas
- Centro de Graduados e Investigación en Química, Tecnológico Nacional de México/ IT de Tijuana, Tijuana, B. C., Mexico
| | - Eleazar Alcántar-Zavala
- Centro de Graduados e Investigación en Química, Tecnológico Nacional de México/ IT de Tijuana, Tijuana, B. C., Mexico
| | - M. Graciela Gil-Rivas
- Centro de Graduados e Investigación en Química, Tecnológico Nacional de México/ IT de Tijuana, Tijuana, B. C., Mexico
| | - Edgar Estrada-Zavala
- Facultad de Ciencias Químico Biológicas, Universidad Autónoma de Sinaloa, Culiacán, Sin, Mexico
| | - Adrián Ochoa-Terán
- Centro de Graduados e Investigación en Química, Tecnológico Nacional de México/ IT de Tijuana, Tijuana, B. C., Mexico
| | - Y. Gochi-Ponce
- Centro de Graduados e Investigación en Química, Tecnológico Nacional de México/ IT de Tijuana, Tijuana, B. C., Mexico
| | - Julio Montes-Ávila
- Facultad de Ciencias Químico Biológicas, Universidad Autónoma de Sinaloa, Culiacán, Sin, Mexico
| | - Alberto Cabrera
- Centro de Graduados e Investigación en Química, Tecnológico Nacional de México/ IT de Tijuana, Tijuana, B. C., Mexico
| | - Balter Trujillo-Navarrete
- Centro de Graduados e Investigación en Química, Tecnológico Nacional de México/ IT de Tijuana, Tijuana, B. C., Mexico
| | - Yazmin Yorely Rivera-Lugo
- Centro de Graduados e Investigación en Química, Tecnológico Nacional de México/ IT de Tijuana, Tijuana, B. C., Mexico
| | - Gabriel Alonso-Núñez
- Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, Ensenada, B. C, Mexico
| | - Edgar A. Reynoso-Soto
- Centro de Graduados e Investigación en Química, Tecnológico Nacional de México/ IT de Tijuana, Tijuana, B. C., Mexico
| | - J. L. Medina-Franco
- Departamento de Farmacia, Facultad de Química, Universidad Nacional Autónoma de México, Ciudad de México, Mexico
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10
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Saleemi M, Kong Y, Yong P, Wong E. An overview of recent development in therapeutic drug carrier system using carbon nanotubes. J Drug Deliv Sci Technol 2020. [DOI: 10.1016/j.jddst.2020.101855] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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11
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Thakkar M, Islam MS, Railkar A, Mitra S. Antisolvent precipitative immobilization of micro and nanostructured griseofulvin on laboratory cultured diatom frustules for enhanced aqueous dissolution. Colloids Surf B Biointerfaces 2020; 196:111308. [PMID: 32784059 DOI: 10.1016/j.colsurfb.2020.111308] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Revised: 08/01/2020] [Accepted: 08/04/2020] [Indexed: 01/03/2023]
Abstract
We report for the first time an antisolvent synthesis of nanostructured hydrophobic drug formulation onto a natural diatom. The jewel of the sea, a marine diatom, which is enriched in silicon, was cultured and grown in the laboratory. Its frustules were isolated and purified. The polar functional group on its surface provided unique physical and chemical properties. Griseofulvin (GF), an antifungal drug was used as a model compound was precipitated onto and adsorbed onto hydrophilic diatom surface, while stabilizer hydroxypropyl methyl cellulose (HPMC) was used for restricting particle growth during the composite synthesis. This work demonstrates that the fine drug crystals incorporated onto the diatom silica surface. The structural and morphological properties of the drug was characterized by various techniques. The drug loading of the formulation was estimated to be 41 % by weight. The incorporation of micro/nano crystals on the diatom surface dramatically enhanced the dissolution rate, and lowered the time required for 50 % dissolution for pure drug from 240-58 min for the drug composite, and the time required for 80 % dissolution or T80 was found to be 180 min for the composite while the pure drug reached a maximum of 65 % in 300 min.
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Affiliation(s)
- Megha Thakkar
- Department of Chemistry and Environmental Science, New Jersey Institute of Technology, Newark, NJ, United States
| | - Mohammad Saiful Islam
- Department of Chemistry and Environmental Science, New Jersey Institute of Technology, Newark, NJ, United States
| | - Aditya Railkar
- Department of Chemistry and Environmental Science, New Jersey Institute of Technology, Newark, NJ, United States
| | - Somenath Mitra
- Department of Chemistry and Environmental Science, New Jersey Institute of Technology, Newark, NJ, United States.
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12
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Islam MS, Renner F, Azizighannad S, Mitra S. Direct incorporation of nano graphene oxide (nGO) into hydrophobic drug crystals for enhanced aqueous dissolution. Colloids Surf B Biointerfaces 2020; 189:110827. [PMID: 32028132 PMCID: PMC7160045 DOI: 10.1016/j.colsurfb.2020.110827] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Revised: 01/22/2020] [Accepted: 01/25/2020] [Indexed: 01/14/2023]
Abstract
This paper reports the development of a successful anti-solvent method that incorporates colloidal nano scale graphene oxide (nGO) directly into hydrophobic drug crystals. The nGO dispersed in solution acted as nucleating sites for crystallization and were embedded into the drug crystals without altering its structure or physical properties such as melting point. Several composites of drugs Sulfamethoxazole and Griseofulvin were synthesized with nGO concentration ranging between 0.2 and 1.0 %. The presence of nGO dramatically enhanced the dissolution rate. The time needed to reach a 50 % release (T50) reduced from 42-14 min with the integration of 0.8 % nGO in SMZ, while in GF the reduction was from 44-27 min with 0.5 % nGO. Increased release rates are attributed to the presence of the hydrophilic nGO which hydrogen bond more so with the aqueous mediums. Therefore, the incorporation of nGO into poorly soluble drugs is an effective approach towards drug delivery and bioavailability improvement and opens a new approach to high performance drug delivery.
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Affiliation(s)
- Mohammad Saiful Islam
- Department of Chemistry and Environmental Science, New Jersey Institute of Technology, Newark, NJ, 07102, USA
| | - Faradae Renner
- Department of Chemistry and Environmental Science, New Jersey Institute of Technology, Newark, NJ, 07102, USA
| | - Samar Azizighannad
- Department of Chemistry and Environmental Science, New Jersey Institute of Technology, Newark, NJ, 07102, USA
| | - Somenath Mitra
- Department of Chemistry and Environmental Science, New Jersey Institute of Technology, Newark, NJ, 07102, USA.
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13
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Tian Z, Heil T, Schmidt J, Cao S, Antonietti M. Synthesis of a Porous C 3N-Derived Framework with High Yield by Gallic Acid Cross-Linking Using Salt Melts. ACS APPLIED MATERIALS & INTERFACES 2020; 12:13127-13133. [PMID: 32091193 PMCID: PMC7307830 DOI: 10.1021/acsami.9b20478] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Porous carbon/nitrogen frameworks are an emerging class of noble organic materials with a wide range of potential applications. However, the design and controlled synthesis of those materials are still a challenge. Herein, we present the rational design of such a system with high microporosity, specific surface areas of up to 946 m2 g-1, and excellent condensation yields. The obtained noble frameworks were used for the delivery of larger organic molecules and changed the melting behavior of some daily drug molecules along their highly polarizable surfaces.
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Affiliation(s)
- Zhihong Tian
- School
of Materials Science and Engineering, Zhengzhou
University, Zhengzhou 450001, P. R. China
- Department
of Colloid Chemistry, Max Planck Institute
of Colloids and Interfaces, Potsdam 14476, Germany
| | - Tobias Heil
- Department
of Colloid Chemistry, Max Planck Institute
of Colloids and Interfaces, Potsdam 14476, Germany
| | - Johannes Schmidt
- Technical
University of Berlin, Institute of Chemistry, Hardenberg str. 40, Berlin 10623, Germany
| | - Shaokui Cao
- School
of Materials Science and Engineering, Zhengzhou
University, Zhengzhou 450001, P. R. China
| | - Markus Antonietti
- Department
of Colloid Chemistry, Max Planck Institute
of Colloids and Interfaces, Potsdam 14476, Germany
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Shrimal P, Jadeja G, Patel S. A review on novel methodologies for drug nanoparticle preparation: Microfluidic approach. Chem Eng Res Des 2020. [DOI: 10.1016/j.cherd.2019.11.031] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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Controlling the Dissolution Rate of Hydrophobic Drugs by Incorporating Carbon Nanotubes with Different Levels of Carboxylation. APPLIED SCIENCES-BASEL 2019. [DOI: 10.3390/app9071475] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
We present the anti-solvent precipitation of hydrophobic drugs griseofulvin (GF) and sulfamethoxazole (SMZ) in the presence of carboxylated carbon nanotubes (f-CNTs). The aqueous dispersed f-CNTs were directly incorporated into the drug particles during the precipitation process. f-CNTs with different levels of carboxylation were tested where the hydrophilicity was varied by altering the C:COOH ratio. The results show that the hydrophilic f-CNTs dramatically enhanced the dissolution rate for both drugs, and the enhancement corresponded to the hydrophilicity of f-CNTs. The time to reach 80% dissolution (t80) reduced from 52.5 min for pure SMZ to 16.5 min when incorporated f-CNTs that had a C:COOH ratio of 23.2 were used, and to 11.5 min when the ratio dropped to 16. A corresponding decrease was observed for SMZ for the above-mentioned f-CNTs. The study clearly demonstrates that it is possible to control the dissolution rate of hydrophobic drugs by altering the level of carboxylation of the incorporated CNTs.
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Raphey VR, Henna TK, Nivitha KP, Mufeedha P, Sabu C, Pramod K. Advanced biomedical applications of carbon nanotube. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 100:616-630. [PMID: 30948098 DOI: 10.1016/j.msec.2019.03.043] [Citation(s) in RCA: 95] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Revised: 02/26/2019] [Accepted: 03/11/2019] [Indexed: 01/13/2023]
Abstract
With advances in nanotechnology, the applications of nanomaterial are developing widely and greatly. The characteristic properties of carbon nanotubes (CNTs) make them the most selective candidate for various multi-functional applications. The greater surface area of the CNTs in addition to the capability to manipulate the surfaces and dimensions has provided greater potential for this nanomaterial. The CNTs possess greater potential for applications in biomedicine due to their vital electrical, chemical, thermal, and mechanical properties. The unique properties of CNT are exploited for numerous applications in the biomedical field. They are useful in both therapeutic and diagnostic applications. They form novel carrier systems which are also capable of site-specific delivery of therapeutic agents. In addition, CNTs are of potential application in biosensing. Many recently reported advanced systems of CNT could be exploited for their immense potential in biomedicine in the future.
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Affiliation(s)
- V R Raphey
- College of Pharmaceutical Sciences, Govt. Medical College, Kozhikode, Kerala, India
| | - T K Henna
- College of Pharmaceutical Sciences, Govt. Medical College, Kozhikode, Kerala, India
| | - K P Nivitha
- College of Pharmaceutical Sciences, Govt. Medical College, Kozhikode, Kerala, India
| | - P Mufeedha
- College of Pharmaceutical Sciences, Govt. Medical College, Kozhikode, Kerala, India
| | - Chinnu Sabu
- College of Pharmaceutical Sciences, Govt. Medical College, Kozhikode, Kerala, India
| | - K Pramod
- College of Pharmaceutical Sciences, Govt. Medical College, Kozhikode, Kerala, India.
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