Comparison of In Vitro Binding of Various Bile Salts by Coconut Fibers

2014 ◽  
Vol 1060 ◽  
pp. 155-158 ◽  
Author(s):  
Pornsak Sriamornsak ◽  
Sontaya Limmatvapirat ◽  
Panida Asavapichayont ◽  
Srisuda Konthong
Keyword(s):  
Particle Size ◽  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Bile Salts ◽  
High Performance ◽  
Sodium Taurocholate ◽  
Sodium Deoxycholate ◽  
Sodium Cholate ◽  
Coconut Fiber

The aim of this study was to compare the in vitro binding of bile salts by coconut fiber, a by-product of coconut milk extraction. The raw coconut fiber was processed by different methods before binding test, that is, sieving, pulverizing in mortar, grinding by a dry grinder, digesting with 0.1 N hydrochloric acid (HCl), grinding by a dry grinder and then digesting with 0.1 N HCl. The resultant coconut fiber was sieved to obtain the particle size ranged from 250 to 600 μm. Various bile salts, i.e., sodium deoxycholate, sodium cholate and sodium taurocholate, were individually tested and analyzed by high performance liquid chromatography. The results showed that sodium deoxycholate was bound by sieved coconut fiber (9.64%), mortar-ground coconut fiber (12.91%), grinder-ground coconut fiber (28.31%), acid-digested coconut fiber (41.14%), and grinder-ground and acid-digested coconut fiber (37.54%). Similar results were obtained when sodium cholate and sodium taurocholate were tested but to a lesser extent. It can be concluded from these results that coconut fiber may have potential application as a cholesterol-reducing agent.

scholarly journals NLC as a potential carrier system for transdermal delivery of forskolin*

2018 ◽  
Vol 65 (3) ◽  
Author(s):  
Elwira Lasoń ◽  
Elżbieta Sikora ◽  
Małgorzata Miastkowska ◽  
Elvira Escribano ◽  
Maria Jose Garcia-Celma ◽  
...  
Keyword(s):  
Particle Size ◽  
High Pressure ◽  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Transdermal Delivery ◽  
High Performance ◽  
High Pressure Homogenization ◽  
Carrier System ◽  
Macroscopic Observation

NLC (nanostructured lipid carriers), composed with substances of GRAS (generally recognized as safe) status, were obtained by using the hot high pressure homogenization technique (HPH). The influence of number of homogenization cycles and concentration of a surfactant (decyl glucoside) on NLC properties were studied. The systems stability was assessed by macroscopic observation, light backscattering and zeta potential measurements. NLC particle size was measured by means of dynamic light scattering (DLS). The kinetically stable formulations were loaded with forskolin and selected for in vitro drug permeation study (Franz cell method). The concentration of forskolin in the receptor solution (i.e. Ethanol/PBS mixture) was analyzed by high performance liquid chromatography (HPLC) with UV detection. The obtained results have shown that NLC formulations could be used as effective carriers for forskolin permeation through the skin.

scholarly journals Phytochemical variability during vegetation of Chamerion angustifolium (L.) Holub genotypes derived from in vitro cultures

2021 ◽  
Author(s):  
Mariola Dreger ◽  
Katarzyna Seidler-Łożykowska ◽  
Milena Szalata ◽  
Artur Adamczak ◽  
Karolina Wielgus
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
High Performance ◽  
Array Detector ◽  
Reproduction Rate ◽  
Full Spectrum ◽  
Breeding Programs ◽  
Chamerion Angustifolium ◽  
Oenothein B

AbstractThe purpose of the study was to evaluate Chamerion angustifolium (L.) Holub genotypes for preliminary selection and further breeding programs aimed at obtaining a suitable industrial form for the pharmaceutical applications. Clonally propagated plants representing 10 genotypes of Ch. angustifolium were regenerated under in vitro conditions, hardened and planted in the field. Studies included an evaluation of shoot proliferation, phytochemical assessment of in vitro and ex vitro plants as well as investigations of intraspecies variability regarding four phenological stages: vegetative, beginning of blooming, full blooming, and green fruit phases. Quantitative and qualitative analyses of bioactive compounds were performed using high-performance liquid chromatography coupled with diode array detector and tandem mass spectrometer (HPLC–DAD–MS/MS) and high-performance liquid chromatography (HPLC) methods. The efficiency of shoot multiplication varied between genotypes from 8.12 to 21.48 shoots per explant. A high reproduction rate (> 20 shoots per explant) was recorded for four lines (PL_45, PL_44, PL_58, DE_2). Plants grown in vitro synthesized oenothein B (11.2–22.3 mg g−1 DW) and caffeic acid derivatives. Plants harvested from field contained the full spectrum of polyphenols characteristic for this species, and oenothein B and quercetin 3-O-glucuronide were the most abundant. The maximal content of oenothein B was determined in the vegetative phase of fireweed, while some flavonoids were found in the highest amount in full blooming phase. The results of analysis of variance indicated significant differences among genotypes in oenothein B, 3-O-caffeoylquinic acid and flavonoids accumulation in four phenological phases. PL_44 plants were characterized by high content of oenothein B and quercetin 3-O-glucuronide as well as a relatively high level of other flavonoids. Based on our phytochemical and micropropagation studies, PL_44 genotype was the best candidate for early selection and further breeding programs.

In vitro evaluation of the effect of nicotine, cotinine, and caffeine on oral microorganisms

2008 ◽  
Vol 54 (6) ◽  
pp. 501-508 ◽  
Author(s):  
Karina Cogo ◽  
Michelle Franz Montan ◽  
Cristiane de Cássia Bergamaschi ◽  
Eduardo D. Andrade ◽  
Pedro Luiz Rosalen ◽  
...  
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
High Performance ◽  
Culture Media ◽  
Bacterial Species ◽  
In Vitro Study ◽  
Bacterial Strains ◽  
Planktonic Cells ◽  
Susceptibility Tests

The aim of this in vitro study was to evaluate the effects of nicotine, cotinine, and caffeine on the viability of some oral bacterial species. It also evaluated the ability of these bacteria to metabolize those substances. Single-species biofilms of Streptococcus gordonii , Porphyromonas gingivalis , or Fusobacterium nucleatum and dual-species biofilms of S. gordonii – F. nucleatum and F. nucleatum – P. gingivalis were grown on hydroxyapatite discs. Seven species were studied as planktonic cells, including Streptococcus oralis , Streptococcus mitis , Propionibacterium acnes , Actinomyces naeslundii , and the species mentioned above. The viability of planktonic cells and biofilms was analyzed by susceptibility tests and time-kill assays, respectively, against different concentrations of nicotine, cotinine, and caffeine. High-performance liquid chromatography was performed to quantify nicotine, cotinine, and caffeine concentrations in the culture media after the assays. Susceptibility tests and viability assays showed that nicotine, cotinine, and caffeine cannot reduce or stimulate bacterial growth. High-performance liquid chromatography results showed that nicotine, cotinine, and caffeine concentrations were not altered after bacteria exposure. These findings indicate that nicotine, cotinine, and caffeine, in the concentrations used, cannot affect significantly the growth of these oral bacterial strains. Moreover, these species do not seem to metabolize these substances.

Prosthetic Vascular Conduit in Contaminated Fields: A New Technology to Decrease ePTFE Infections

2008 ◽  
Vol 74 (6) ◽  
pp. 524-529
Author(s):  
Peter E. Fischer ◽  
Timothy C. Fabian ◽  
Waldemar G. Derijk ◽  
Norma M. Edwards ◽  
Michael Decuypere ◽  
...  
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Mass Spectroscopy ◽  
High Performance ◽  
Susceptibility Testing ◽  
Graft Loss ◽  
Vascular Reconstruction ◽  
Water Bath ◽  
Eptfe Graft

Vascular reconstruction using prosthetic materials in contaminated fields can lead to infection, graft loss, and subsequent amputation. We hypothesized that minocycline and rifampin bound to an ePTFE graft using a unique methacrylate technology would provide for resistance from infection and controlled antibiotic elution. Kirby Bauer susceptibility testing was performed on plates overlaid with Staph aureus (SA) and Staph epidermidis (SE) using 6 mm diameter discs of uncoated graft or antibiotic coated graft (ABX). Zones of inhibition (ZIH) were determined after 24 hours. ABX grafts were then placed in a continuous water bath and a recirculating, pulsatile flow device. Susceptibility testing and high performance liquid chromatography with mass spectroscopy was performed to determine graft performance and antibiotic elution rate. ABX grafts had an average ZIH of 35 mm for SA and 44 mm for SE (each P < 0.0001). After the 1 week water bath, the ZIH of the ABX grafts was 23 mm on both the SA and SE plates. The high performance liquid chromatography with mass spectroscopy revealed that after 24 hours, 50 per cent of the antibiotics remained on the graft, and there was a sustained elution for 7 days. Minocycline and rifampin can be bound to ePTFE vascular grafts using a unique methacrylate method. In vitro, the grafts provide a slow elution of antibiotics that provide resistance from infection by SA and SE for up to 2 weeks after graft insertion.

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