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Progress in Biomaterials

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https://www.readbyqxmd.com/read/30022467/chitosan-polyethylene-glycol-fumarate-blend-films-for-wound-dressing-application-in-vitro-biocompatibility-and-biodegradability-assays
#1
Azadehsadat Hashemi Doulabi, Hamid Mirzadeh, Mohammad Imani, Shadab Bagheri-Khoulenjani
Blending is one of the effective approaches in preparing tailored materials with a wide range of properties. Thus, chitosan-based polymers have been fabricated and used as wound dressings since they possess better properties than those of the constituent materials. The objective of this work was to evaluate the biocompatibility and biodegradability of biodegradable blend films based on polyethylene glycol-co-fumarate (PEGF) and chitosan (Ch). The blend films of Ch/PEGF were prepared by solution casting/solvent evaporation method...
July 18, 2018: Progress in Biomaterials
https://www.readbyqxmd.com/read/30019188/allogenic-vs-synthetic-granules-for-bone-tissue-engineering-an-in-vitro-study
#2
Farnaz Kouhestani, Farnaz Dehabadi, Mehrnoosh Hasan Shahriari, Saeed Reza Motamedian
The aim of this study was to compare human dental pulp stem cells' (DPSCs) attachment, proliferation and osteogenic differentiation on allogenic and synthetic biphasic bone granules. In this in vitro study, two types of bone granules were used: allograft [freeze-dried bone allograft (FDBA)] and biphasic granules [hydroxyapatite/beta-tricalcium phosphate (HA/β-TCP)]. By isolation of DPSCs, their attachment to bone granules was observed by scanning electron microscope (SEM) at day 1 and 7 of cultivation. Vital cells were measured by MTT assay at 1, 3, and 7 days of cell culture...
July 17, 2018: Progress in Biomaterials
https://www.readbyqxmd.com/read/29790132/updates-on-the-research-and-development-of-absorbable-metals-for-biomedical-applications
#3
REVIEW
Hendra Hermawan
Absorbable metals, metals that corrode in physiological environment, constitute a new class of biomaterials intended for temporary medical implant applications. The introduction of these metals has shifted the established paradigm of metal implants from preventing corrosion to its direct application. Interest toward absorbable metals has been growing in the past decade. This is proved by the rapid increase in scientific publication, progressive development of standards, and launching the first commercial products...
May 22, 2018: Progress in Biomaterials
https://www.readbyqxmd.com/read/29785538/stress-phase-angle-regulates-differentiation-of-human-adipose-derived-stem-cells-toward-endothelial-phenotype
#4
Shahrokh Shojaei, Mohammad Tafazzoli-Shadpour, Mohammad Ali Shokrgozar, Nooshin Haghighipour, Fatemeh Hejazi Jahromi
Endothelial cells are subjected to cyclic shear by pulsatile blood flow and pressures due to circumferential stresses. Although most of the researches on this topic have considered the effects of these two biomechanical forces separately or concurrently, few studies have noticed the interaction of these cyclic loadings on endothelial behavior. Negative temporal stress phase angle, defined by the phase lag between cyclic shear and tensile stresses, is an established parameter which is known to have substantial effects on blood vessel remodeling and progression of some serious cardiovascular diseases...
May 21, 2018: Progress in Biomaterials
https://www.readbyqxmd.com/read/29754201/skin-bioprinting-a-novel-approach-for-creating-artificial-skin-from-synthetic-and-natural-building-blocks
#5
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
#6
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
#7
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
#8
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
#9
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
#10
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
#11
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
#12
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
#13
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
#14
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...
March 2018: 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
#15
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
#16
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
#17
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
#18
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
#19
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
#20
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
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