Low Protein Natural Rubber Latex - Based Polymer Blends for Transdermal Patches of Mefenamic Acid

2020 ◽  
Vol 859 ◽  
pp. 34-38
Author(s):  
Jirapornchai Suksaeree ◽  
Wiwat Pichayakorn ◽  
Patsakorn Siripornpinyo ◽  
Somruethai Chaiprasit ◽  
Pattwat Maneewattanapinyo
Keyword(s):  
Natural Rubber ◽  
Mefenamic Acid ◽  
Hydroxypropyl Methylcellulose ◽  
Natural Rubber Latex ◽  
Rubber Latex ◽  
Low Protein ◽  
Transdermal Patches ◽  
Crystallization Inhibitor ◽  
Pass Metabolism

Transdermal patches are attraction and acceptance for the patient due to avoid first-pass metabolism, easy to administer and removal, allows rapid termination of treatment if required etc. Low protein natural rubber latex (LPNRL) is a natural polymer that removed the allergic protein from fresh NRL prepared by treatment with proteolytic enzyme and centrifuging process. LPNRL is used for medical skin applications with the non-allergenic product. The objective of this research aimed to prepare the mefenamic acid – loaded transdermal patches made from LPNRL blended with either hydroxypropyl methylcellulose (HPMC) or polyvinyl alcohol (PVA), glycerin and polyvinylpyrrolidone were used as plasticizer and crystallization inhibitor, respectively. The moisture uptake and swelling ratio showed the increment value after either HPMC or PVA was blended in LPNRL because of the increment of their hydrophilicity. These patches showed the homogeneous films that observed by the researcher. The in vitro release showed a faster release rate after either HPMC or PVA was blended in LPNRL. It was concluded that mefenamic acid – loaded transdermal patches could be prepared by using LPNRL blended with either HPMC or PVA as matrix film former could provide an increased and controlled release of the drug. Moreover, it was safe to apply on the skin as did not cause irritation.

Characterization of Lidocaine Transdermal Patches from Natural Rubber Latex

2013 ◽  
Vol 747 ◽  
pp. 103-106 ◽  
Author(s):  
Prapaporn Boonme ◽  
Hasleena Boontawee ◽  
Wirach Taweepreda ◽  
Wiwat Pichayakorn
Keyword(s):  
Drug Release ◽  
Natural Rubber ◽  
Physicochemical Properties ◽  
Rubber Tree ◽  
Natural Rubber Latex ◽  
Rubber Latex ◽  
Transdermal Patches ◽  
The Stability ◽  
Main Component

The mucous liquid of Hevea brasiliensis or Para rubber tree, called natural rubber latex (NRL), composes of cis-1,4-polyisoprene which can form a patch under suitable formulation. In this study, blank and 5% lidocaine-loaded NRL patches were formulated and then characterized for physicochemical properties as well as evaluated in vitro drug release and stability. The patches were observed for their appearances. Surface morphology of the patches was investigated using a SEM. XRD was employed to study the crystallinity of the drug, the patch, and the drug-loaded patch. The extractions of lidocaine-loaded patches were analyzed for drug contents by HPLC. In vitro drug release study was performed using modified Franz diffusion cells. The patches at initial preparation and after kept at 4, 25, and 45 °C for 3 months were investigated for the stability determination. The results suggested that NRL could be used as a main component in pharmaceutical transdermal patches with acceptable physicochemical properties. Lidocaine-loaded NRL patches provided desirable drug release but high storage temperatures could age the patches resulting in darken color and lower release amount.

scholarly journals Preparation of low-protein natural rubber latex: Effect of polyethylene glycol

2009 ◽  
Vol 114 (2) ◽  
pp. 806-810 ◽  
Author(s):  
G. Abhilash ◽  
S. Sabharwal ◽  
Abhinav Dubey ◽  
Jose Paul ◽  
Honey John ◽  
...  
Keyword(s):  
Polyethylene Glycol ◽  
Natural Rubber ◽  
Natural Rubber Latex ◽  
Rubber Latex ◽  
Low Protein

scholarly journals Novel Type of Heme-Dependent Oxygenase Catalyzes Oxidative Cleavage of Rubber (Poly-cis-1,4-Isoprene)

2004 ◽  
Vol 70 (12) ◽  
pp. 7388-7395 ◽  
Author(s):  
Reinhard Braaz ◽  
Peter Fischer ◽  
Dieter Jendrossek
Keyword(s):  
Natural Rubber ◽  
High Performance ◽  
Natural Rubber Latex ◽  
Culture Fluid ◽  
Oxidative Cleavage ◽  
Covalent Attachment ◽  
Rubber Latex ◽  
Chromatography Analysis ◽  
Cloned Gene

ABSTRACT An extracellular protein with strong absorption at 406 nm was purified from cell-free culture fluid of latex-grown Xanthomonas sp. strain 35Y. This protein was identical to the gene product of a recently characterized gene cloned from Xanthomonas sp., as revealed by determination of m/z values and sequencing of selected isolated peptides obtained after trypsin fingerprint analysis. The purified protein degraded both natural rubber latex and chemosynthetic poly(cis-1,4-isoprene) in vitro by oxidative cleavage of the double bonds of poly(cis-1,4-isoprene). 12-Oxo-4,8-dimethyltrideca-4,8-diene-1-al (m/z 236) was identified and unequivocally characterized as the major cleavage product, and there was a homologous series of minor metabolites that differed from the major degradation product only in the number of repetitive isoprene units between terminal functions, CHO-CH2— and —CH2-COCH3. An in vitro enzyme assay for oxidative rubber degradation was developed based on high-performance liquid chromatography analysis and spectroscopic detection of product carbonyl functions after derivatization with dinitrophenylhydrazone. Enzymatic cleavage of rubber by the purified protein was strictly dependent on the presence of oxygen; it did not require addition of any soluble cofactors or metal ions and was optimal around pH 7.0 at 40°C. Carbon monoxide and cyanide inhibited the reaction; addition of catalase had no effect, and peroxidase activity could not be detected. The purified protein was specific for natural rubber latex and chemosynthetic poly(cis-1,4-isoprene). Analysis of the amino acid sequence deduced from the cloned gene (roxA [rubber oxygenase]) revealed the presence of two heme-binding motifs (CXXCH) for covalent attachment of heme to the protein. Spectroscopic analysis confirmed the presence of heme, and approximately 2 mol of heme per mol of RoxA was found.

BIO-CACO3 FROM RAW EGGSHELL AS ADDITIVE IN NATURAL RUBBER LATEX GLOVE FILMS

2019 ◽  
Vol 92 (3) ◽  
pp. 558-577
Author(s):  
Nuchnapa Tangboriboon ◽  
Rujika Takkire ◽  
Watchara Sangwan ◽  
Sairung Changkhamchom ◽  
Anuvat Sirivat
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Natural Rubber ◽  
Protein Content ◽  
Natural Rubber Latex ◽  
Film Surface ◽  
Rubber Latex ◽  
Elongation At Break ◽  
Latex Glove ◽  
Low Protein

ABSTRACT Raw hen eggshell powder, a calcium carbonate source, was used as a biofiller in the natural rubber latex compound and latex glove film formation via dipping process. The powder was anticipated to improve the physical (smoothness and thickness of film) and mechanical properties (tensile strength and elongation at break) of latex film and to reduce the extractable protein content on film surface. Eggshell powder ground by a rapid mill was fine particles of approximately 37.48 μm in diameter, suitable for homogeneous and compatible addition into the natural rubber latex compound. Dipping hand mold into the natural rubber latex compound with 50 wt% eggshell added was the best formula to obtain a smooth, clear, thin film surface, with the tensile strength of 23.24 ± 0.745 MPa and the highest elongation at break of 723.99 ± 14.60%, along with a low protein content, a dense film without water leakage, and with a good contact angle. The natural rubber latex glove film possessed good physical-mechanical properties and a low protein content as the results of the raw eggshell powder added as a biofiller.

scholarly journals Natural rubber latex: Development and in vitro characterization of a future transdermal patch for enuresis treatment

2017 ◽  
Vol 66 (17) ◽  
pp. 871-876 ◽  
Author(s):  
Natan Roberto de Barros ◽  
Matheus Carlos Romeiro Miranda ◽  
Felipe Azevedo Borges ◽  
José Lúcio Pádua Gemeinder ◽  
Ricardo José de Mendonça ◽  
...  
Keyword(s):  
Natural Rubber ◽  
Natural Rubber Latex ◽  
Transdermal Patch ◽  
Rubber Latex ◽  
In Vitro Characterization
Sign in / Sign up

Export Citation Format

Share Document