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Progress in Biomaterials

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https://www.readbyqxmd.com/read/29754201/skin-bioprinting-a-novel-approach-for-creating-artificial-skin-from-synthetic-and-natural-building-blocks
#1
Robin Augustine
Significant progress has been made over the past few decades in the development of in vitro-engineered substitutes that mimic human skin, either as grafts for the replacement of lost skin, or for the establishment of in vitro human skin models. Tissue engineering has been developing as a novel strategy by employing the recent advances in various fields such as polymer engineering, bioengineering, stem cell research and nanomedicine. Recently, an advancement of 3D printing technology referred as bioprinting was exploited to make cell loaded scaffolds to produce constructs which are more matching with the native tissue...
May 12, 2018: Progress in Biomaterials
https://www.readbyqxmd.com/read/29748742/effect-of-bioactive-glass-nanoparticles-on-biological-properties-of-plga-collagen-scaffold
#2
Samira Nokhasteh, Alireza Sadeghi-Avalshahr, Amir Mahdi Molavi, Mohammad Khorsand-Ghayeni, Hojjat Naderi-Meshkin
Bioactive glasses have shown some interesting biological properties such as biocompatibility, biodegradation, and angiogenesis in skin tissue engineering. In the current research, the effects of MgO- or CoO-doped 64S bioactive glass with a composition of 64 SiO2 -26 CaO-5 P2 O5 -5 MgO or CoO (mol%) were studied in relation with biological properties of electrospun [poly(lactic-co-glycolic acid) (PLGA)/collagen]. PLGA/collagen samples were rinsed in suspension of bioactive glass nanoparticles in distilled water with a concentration of 0...
May 11, 2018: Progress in Biomaterials
https://www.readbyqxmd.com/read/29627953/correction-to-solidification-of-hydatid-cyst-fluid-with-an-injectable-chitosan-carboxymethylcellulose-%C3%AE-glycerophosphate-hydrogel-for-effective-control-of-spillage-during-aspiration-of-hydatid-cysts
#3
Mostafa D A Azadi, Shadi Hassanajili, Khalil Zarrabi, Bahador Sarkari
The original version of this article unfortunately contained a mistake: the spelling of the Shadi Hassanajili's name was incorrect. The corrected name is given above.
April 7, 2018: Progress in Biomaterials
https://www.readbyqxmd.com/read/29460181/immunoisolation-of-stem-cells-by-simultaneous-encapsulation-and-pegylation
#4
Roya Ramezanzadeh Andevari, Sameereh Hashemi-Najafabadi, Fatemeh Bagheri
Today, cell therapy is known as an important tool in the treatment of chronic diseases where cells lose their normal function. Immunoisolation systems using microencapsulation or PEGylation have been developed to evade the problem of rejection by the immune system. The aim of the present study was to investigate a combination of microencapsulation and PEGylation methods in coating mouse embryonic stem cells (mESCs) to determine its effect in reducing the host's immune response. Therefore, methoxy polyethylene glycol (mPEG) binding on alginate-trimethyl chitosan (TMC) microcapsules was investigated using FTIR...
March 2018: Progress in Biomaterials
https://www.readbyqxmd.com/read/29460180/solidification-of-hydatid-cyst-fluid-with-an-injectable-chitosan-carboxymethylcellulose-%C3%AE-glycerophosphate-hydrogel-for-effective-control-of-spillage-during-aspiration-of-hydatid-cysts
#5
Mostafa D A Azadi, Shadi Hassanjili, Khalil Zarrabi, Bahador Sarkari
Cystic echinococcosis (CE)/hydatid cyst is one of the most important helminthic diseases in the world. The treatment of hydatid cyst ranges from surgical intervention to chemotherapy, although the efficacy of chemotherapy is still unclear. Postoperative complication which results from the spillage of cysts during surgical operation is one of the most important concerns in surgical treatment of hydatid cyst. The aim of the current study was to solidify the hydatid cyst fluid (HCF) with an injectable and thermosensitive chitosan (CS)/carboxymethyl cellulose (CMC)/β-glycerol phosphate (BGP) hydrogel for effective control of spillage during the aspiration of hydatid cysts...
March 2018: Progress in Biomaterials
https://www.readbyqxmd.com/read/29446015/synthetic-polymeric-biomaterials-for-wound-healing-a-review
#6
Mariam Mir, Murtaza Najabat Ali, Afifa Barakullah, Ayesha Gulzar, Munam Arshad, Shizza Fatima, Maliha Asad
Wounds are of a variety of types and each category has its own distinctive healing requirements. This realization has spurred the development of a myriad of wound dressings, each with specific characteristics. It is unrealistic to expect a singular dressing to embrace all characteristics that would fulfill generic needs for wound healing. However, each dressing may approach the ideal requirements by deviating from the 'one size fits all approach', if it conforms strictly to the specifications of the wound and the patient...
March 2018: Progress in Biomaterials
https://www.readbyqxmd.com/read/29428997/synthesis-of-zeolite-membranes-on-calcium-silicate-support-and-their-bioactive-response
#7
A Medina-Ramírez, A A Flores-Díaz, B Ruiz Camacho, G García-Ruiz
The synthesis of calcium silicate supported zeolite membrane was carried out by second growth method. The chemical nature of the functionalizing agent on the formation of homogenous zeolite membrane was evaluated. One monomer and two cationic polymers were used: 3-aminopropyltriethoxysilane (APS), polyethylenimine (PEI) and polydiallyldimethylammonium chloride (PDDA). The support was subjected to chemical functionalization and then it was rubbed with zeolite crystals. The W zeolite was used as zeolite seed in two different Si/Al ratios...
March 2018: Progress in Biomaterials
https://www.readbyqxmd.com/read/29363004/correction-to-cure-kinetic-study-of-methacrylate-poss-copolymers-for-ocular-lens
#8
F Shokrolahi, M Zandi, P Shokrollahi, M Atai, E Gafar-Zadeh, M Hanifeh
The original version of this article unfortunately contained a mistake: the spelling of the Ebrahim Gafar-Zadehs' name was incorrect. The corrected name is given above.
March 2018: Progress in Biomaterials
https://www.readbyqxmd.com/read/29363003/correction-to-compositional-design-and-taguchi-optimization-of-hardness-properties-in-silicone-based-ocular-lenses
#9
Mohammad Hanifeh, Mojgan Zandi, Parvin Shokrollahi, Mohammad Atai, Ebrahim Gafar-Zadeh, Fahimeh Askari
The original version of this article unfortunately contained a mistake: The spelling of the Ebrahim Gafar-Zadehs' name was incorrect. The corrected name is given above.
March 2018: Progress in Biomaterials
https://www.readbyqxmd.com/read/29196898/fabrication-of-curcumin-loaded-electrospun-nanofiberous-polyurethanes-with-anti-bacterial-activity
#10
A Shababdoust, M Ehsani, P Shokrollahi, M Zandi
Two series of polyurethane (PU), based on polycaprolactone (PCL) as soft segments with two different molecular weights (2000 and 530 Da), and hexamethylene diisocyanate (HDI) and 1,4-butandiol (BDO) as hard segments were synthesized to fabricate curcumin-loaded electrospun nanofibrous PCL-based PU substrate. Chemical structures of the synthesized PUs were characterized by FTIR and NMR spectroscopy techniques. The thermal properties were analyzed by differential scanning calorimetry (DSC) and surface hydrophilicity was studied by static contact angle and bulk hydrophilicity was evaluated by water uptake test...
December 1, 2017: Progress in Biomaterials
https://www.readbyqxmd.com/read/29147947/biocompatibility-of-vertically-aligned-multi-walled-carbon-nanotube-scaffolds-for-human-breast-cancer-cell-line-mda-mb-231
#11
E M Akinoglu, K Ozbilgin, P Kilicaslan Sonmez, M M Ozkut, M Giersig, S Inan, E Gumustepe, C Kurtman
The aim of the current study was to determine whether the MWCNT-based scaffold has a suitable structure for cell growth and provides a biocompatible environment for human MDA-MB-231 cell lines. MWCNT-based nanostructured scaffolds were produced by plasma-enhanced chemical vapor deposition (PECVD) technique. MDA-MB-231 cells were seeded on MWCNTs-textured silicon scaffolds and on pristine silicon surfaces. After 1 week of culturing, the scaffolds were prepared for SEM analysis and immunocytochemical staining was performed for the two groups (MWCNT scaffold and pristine silicon surface), using MMP-2, MMP-9, PI3K, AKT and NF-κB primary antibodies...
December 2017: Progress in Biomaterials
https://www.readbyqxmd.com/read/29116617/nanoparticulated-polymeric-composites-enfolding-lithium-carbonate-as-brain-drug-in-persuading-depression-an-in-vivo-study
#12
A Anita Margret, V Violet Dhayabaran, A Ganesh Kumar
Lithium carbonate is considered an effective drug against mania and acts as a mood stabilizer. It is found that it enhances antidepressants targeting depression, consequently it is prone to have risk factors that leads to adverse effects. The study is devised in confronting depression under nanoscale by preparing nanocomposites which is a matrix of biopolymer chitosan that encapsulates lithium carbonate by ionic gelation method. This facilitates the drug delivery in a regulated manner targeting the therapeutic action with a limited dosage that lessens the side effects in the course of treatment...
December 2017: Progress in Biomaterials
https://www.readbyqxmd.com/read/29110144/new-formulation-and-approach-for-mucoadhesive-buccal-film-of-rizatriptan-benzoate
#13
Sahar Salehi, Soheil Boddohi
Mucoadhesive buccal film is developed as a promising dosage form, which has prominent advantages because of drug delivery through buccal mucosa. New formulation of buccal films containing rizatriptan benzoate (RB) was prepared by solvent casting method using various concentrations of hydroxypropyl methylcellulose (HPMC K4M), polyvinyl alcohol (PVA), polyethylene oxide (PEO), glycerol, stevia, and goat buccal mucosa used as a model membrane. In this work, the effect of polymers and plasticizer concentrations on drug release profile, disintegration and dissolution time, mechanical properties, and mucoadhesive characteristics of films was studied...
December 2017: Progress in Biomaterials
https://www.readbyqxmd.com/read/29071535/cure-kinetic-study-of-methacrylate-poss-copolymers-for-ocular-lens
#14
F Shokrolahi, M Zandi, P Shokrollahi, M Atai, E Ghafarzadeh, M Hanifeh
The physical, mechanical and biological properties of multicomponent acrylate-based hard lenses are directly influenced by degree of conversion achieved during copolymerization. In this research, polyhedral oligomeric silsesquioxane (POSS) acrylate is introduced into the polymer backbone in combination with hydroxyethyl methacrylate, dimethyl itaconate, methyl methacrylate, 3-(trimethoxysilyl) propyl methacrylate and triethylene glycol dimethacrylate in free-radical bulk polymerization. Kinetics of curing process was investigated by two techniques: differential scanning calorimetry and FTIR spectroscopy...
December 2017: Progress in Biomaterials
https://www.readbyqxmd.com/read/29063422/anisotropic-dehydration-of-hydrogel-surfaces
#15
Georgia Kaklamani, David Cheneler, Liam M Grover, Michael J Adams, Spiros H Anastasiadis, James Bowen
Efforts to develop tissue-engineered skin for regenerative medicine have explored natural, synthetic, and hybrid hydrogels. The creation of a bilayer material, with the stratification exhibited by native skin, is a complex problem. The mechanically robust, waterproof epidermis presents the stratum corneum at the tissue/air interface, which confers many of these protective properties. In this work, we explore the effect of high temperatures on alginate hydrogels, which are widely employed for tissue engineering due to their excellent mechanical properties and cellular compatibility...
December 2017: Progress in Biomaterials
https://www.readbyqxmd.com/read/28948511/sn38-peg-plga-verapamil-nanoparticles-inhibit-proliferation-and-downregulate-drug-transporter-abcg2-gene-expression-in-colorectal-cancer-cells
#16
Zahra Nagheh, Shiva Irani, Reza Mirfakhraie, Rassoul Dinarvand
Nowadays, nanoparticle-based drug delivery systems are recognized to reduce the therapeutic side effects. One of the common problems in cancer treatment is cancer drug resistance, resulting from the over-expression of one energy-dependent transporter that enhances drug efflux. Irinotecan is used for metastatic colorectal cancer. The involvement of ABCG2 transporter in irinotecan resistance has been established. The current study was designed to characterize SN38-loaded pegylated (polyethylene glycol) PLGA [poly(lactic-co-glycolic acid)]-verapamil nanoparticles (NPs), and to distinguish the cytotoxic effect of SN38-PEG-PLGA-Ver NPs and the ability of SN38-PEG-PLGA-Ver NPs to inhibit drug resistance through the inhibition of ABCG2 expression...
December 2017: Progress in Biomaterials
https://www.readbyqxmd.com/read/28895062/effect-of-electrospinning-parameters-on-morphological-properties-of-pvdf-nanofibrous-scaffolds
#17
Asma Sadat Motamedi, Hamid Mirzadeh, Fereshteh Hajiesmaeilbaigi, Shadab Bagheri-Khoulenjani, MohammadAli Shokrgozar
Smart materials like piezoelectric polymers represent a new class of promising scaffold in neural tissue engineering. In the current study, the fabrication processing parameters of polyvinylidine fluoride (PVDF) nanofibrous scaffold are found as a potential scaffold with nanoscale morphology and microscale alignment. Electrospinning technique with the ability to mimic the structure and function of an extracellular matrix is a preferable method to customize the scaffold features. PVDF nanofibrous scaffolds were successfully fabricated by the electrospinning technique...
September 2017: Progress in Biomaterials
https://www.readbyqxmd.com/read/28864917/formulation-physicochemical-characterization-and-in-vitro-evaluation-of-human-insulin-loaded-microspheres-as-potential-oral-carrier
#18
Gauravkumar R Agrawal, Pravin Wakte, Santosh Shelke
The objective of the present investigation was to formulate and characterize the human insulin entrapped Eudragit S100 microspheres containing protease inhibitors and to develop an optimized formulation with desirable features. A w/o/w multiple emulsion solvent evaporation technique was employed to produce microspheres of human insulin using Eudragit S-100 as coating material and polyvinyl alcohol as a stabilizer. The resultant microspheres were evaluated for drug-excipient compatibility, encapsulation efficiency, particle size, surface morphology, micromeritic properties, enteric nature, and in vitro drug release studies...
September 2017: Progress in Biomaterials
https://www.readbyqxmd.com/read/28748480/investigation-of-the-effects-of-starch-on-the-physical-and-biological-properties-of-polyacrylamide-paam-starch-nanofibers
#19
Hadi Taghavian, Seyed-Omid Ranaei-Siadat, Mohammad Reza Kalaee, Saeedeh Mazinani
Here, we report the development of a new polyacrylamide (PAAm)/starch nanofibers' blend system and highlight its potential as substrate for efficient enzyme immobilization. PAAm was synthesized and blended with starch. The final blend was then electrospun into nanofibers. The response surface methodology was used to analyze the parameters that control nanofiber's diameter. Electrospun mat was then modified either by cross-linking or phytase immobilization using silane coupling agent and glutaraldehyde chemistry...
September 2017: Progress in Biomaterials
https://www.readbyqxmd.com/read/28726011/thermal-structural-and-acetylation-behavior-of-snail-and-periwinkle-shells-chitin
#20
Oluwashina Philips Gbenebor, Emmanuel Isaac Akpan, Samson Oluropo Adeosun
This article reports a successful removal of CaCO3 from snail and periwinkle shells for the purpose of producing high quality chitin for possible application as bio-fillers in bone fixation materials. Experiment was designed with varying concentrations of acid and alkali for demineralization, deproteinization and deacetylation of the samples. Thermal characteristics, morphology, degree of de-acetylation, crystalline structure and hydrogen bonding characteristics of the extracted chitin were examined. Infra-red spectra, thermogravimetric analysis and X-ray diffraction patterns show that demineralization with 1...
September 2017: Progress in Biomaterials
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