Overview on zein protein: a promising pharmaceutical excipient in drug delivery systems and tissue engineering

2017 ◽  
Vol 15 (1) ◽  
pp. 65-75 ◽  
Author(s):  
Gihan Labib
2021 ◽  
Vol 11 (23) ◽  
pp. 11369
Author(s):  
Ashni Arun ◽  
Pratyusha Malrautu ◽  
Anindita Laha ◽  
Hongrong Luo ◽  
Seeram Ramakrishna

The versatile natural polymer, collagen, has gained vast attention in biomedicine. Due to its biocompatibility, biodegradability, weak antigenicity, biomimetics and well-known safety profile, it is widely used as a drug, protein and gene carrier, and as a scaffold matrix in tissue engineering. Nanoparticles develop favorable chemical and physical properties such as increased drug half-life, improved hydrophobic drug solubility and controlled and targeted drug release. Their reduced toxicity, controllable characteristics of scaffolds and stimuli-responsive behavior make them suitable in regenerative medicine and tissue engineering. Collagen associates and absorbs nanoparticles leading to significant impacts on their biological functioning in any biofluid. This review will discuss collagen nanoparticle preparation methods and their applications and developments in drug delivery systems and tissue engineering.


Materials ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 4995 ◽  
Author(s):  
Rayssa de Sousa Victor ◽  
Adillys Marcelo da Cunha Santos ◽  
Bianca Viana de Sousa ◽  
Gelmires de Araújo Neves ◽  
Lisiane Navarro de Lima Santana ◽  
...  

Chitosan, derived from chitin, is a biopolymer consisting of arbitrarily distributed β-(1-4)-linked D-glucosamine and N-acetyl-D-glucosamine that exhibits outstanding properties— biocompatibility, biodegradability, non-toxicity, antibacterial activity, the capacity to form films, and chelating of metal ions. Most of these peculiar properties are attributed to the presence of free protonable amino groups along the chitosan backbone, which also gives it solubility in acidic conditions. Moreover, this biopolymer can also be physically modified, thereby presenting a variety of forms to be developed. Consequently, this polysaccharide is used in various fields, such as tissue engineering, drug delivery systems, and cancer treatment. In this sense, this review aims to gather the state-of-the-art concerning this polysaccharide when used as a biomaterial, providing information about its characteristics, chemical modifications, and applications. We present the most relevant and new information about this polysaccharide-based biomaterial’s applications in distinct fields and also the ability of chitosan and its various derivatives to selectively permeate through the cancer cell membranes and exhibit anticancer activity, and the possibility of adding several therapeutic metal ions as a strategy to improve the therapeutic potential of this polymer.


2019 ◽  
Vol 30 (9) ◽  
pp. 2183-2191 ◽  
Author(s):  
Muhammad Asim Farooq ◽  
Md Aquib ◽  
Sana Ghayas ◽  
Rabia Bushra ◽  
Daulat Haleem Khan ◽  
...  

2005 ◽  
Vol 896 ◽  
Author(s):  
Reed Ayers ◽  
Doug Burkes ◽  
Guglielmo Gottoli ◽  
H.C. Yi ◽  
Jaque Guigné ◽  
...  

AbstractThe term combustion synthesis, or self-propagating high temperature synthesis (SHS), refers to an exothermic chemical reaction process that utilizes the heat generated by the exothermic reaction to ignite and sustain a propagating combustion wave through the reactants to produce the desired product(s). The products of combustion synthesis normally are extremely porous: typically 50 percent of theoretical densityAdvantages of combustion synthesis over traditional processing routes, e.g., sintering, in the production of advanced materials such as ceramics, intermetallic compounds and composites include process economics, simplicity of operation, and low energy requirements. However, the high exothermicity and rapid combustion propagation rates necessitate a high degree of control of these reactions.One research area being conducted in the Institute for Space Resources (ISR) at the Colorado School of Mines (CSM) is the application of combustion synthesis (SHS) to synthesize advanced, engineered porous multiphase/heterogeneous calcium phosphate (HCaP), NiTi, NiTi-TiC, TiB-Ti, TiC-Ti for bone tissue engineering and drug delivery systems. Such material systems require a complex combination of properties that can be truly classified as multi-functional materials. The range of properties includes: an overall porosity of 40-60% with a pore size of 200-500 μm; mechanical properties (compression strength and Young’s modulus) that match those of natural bone to avoid ‘stress shielding’; and a surface chemistry that is capable of facilitating bone growth and mineralization.The paper will discuss the synthesis of porous multiphase/heterogeneous calcium phosphate (HCaP), NiTi, NiTi-TiC, TiB-Ti, TiC-Ti for bone tissue engineering and drug delivery systems.


2007 ◽  
Vol 539-543 ◽  
pp. 577-582
Author(s):  
Silvia Bubeníková ◽  
Igor Lacík ◽  
Dušan Bakoš ◽  
Lucia Vodná

The paper presents the first part of the work focused on preparation of biodegradable chitosan microcapsules with tailored properties for potential applications in medical field as drug temporary carriers. In this paper, we aimed to prepare chitosan and chondroitin sulphate microcapsules using TPP as the second cross-linker and investigate the formation of the capsule membrane and its permeability in dependence on conditions of polyionic complexation. As a model, TPP was used to assess an influence of concentration and reaction time on the microcapsule formation. The method of inverse SEC was used for pores size and permeability limit of capsules assessment. For chitosan/CHS/TPP capsules, the distribution of pores size in the membrane is rather broad, which can be suitable for applications in tissue engineering and drug delivery systems.


COSMOS ◽  
2008 ◽  
Vol 04 (01) ◽  
pp. 1-15 ◽  
Author(s):  
JOACHIM SAY CHYE LOO

Man has been using plastics for thousands of years, and some of the earlier uses of plastics include spoons, buttons and combs. Today, plastics are used for a myriad of applications, such as for aerospace, microelectronics and water purification. With polymer chemistry, man has been able to alter the properties of plastics or polymers to suit almost any application. Their properties can also be tailored for use as advanced biomedical implants in the human body. An example of such a polymer is the biocompatible lactide/glycolide polyesters. These biodegradable polymers are currently used as sutures, drug delivery systems, temporary implants and even as scaffolds for tissue engineering.


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