Bioactive polysaccharides from the stems of the Thai medicinal plant Acanthus ebracteatus: their chemical and physical features

Graphic Crude water-soluble polysaccharides were isolated from Acanthus ebracteatus by hot water extraction followed by ethanol precipitation after pre-treatment with 80% ethanol. The crude polysaccharides were separated into neutral and acidic polysaccharides by anion-exchange chromatography. The n...

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Published inCarbohydrate research Vol. 339; no. 4; pp. 753 - 762
Main Authors Hokputsa, Sanya, Harding, Stephen E, Inngjerdingen, Kari, Jumel, Kornelia, Michaelsen, Terje E, Heinze, Thomas, Koschella, Andreas, Paulsen, Berit S
Format Journal Article
LanguageEnglish
Published Netherlands Elsevier Ltd 15.03.2004
Subjects
3- O-Methylgalactose
Acanthaceae - chemistry
Acanthus ebracteatus
bioactive properties
Chromatography, Gel
Chromatography, Ion Exchange
Complement Fixation Tests
Complement fixing activity
Complement System Proteins - drug effects
Gas Chromatography-Mass Spectrometry
Hemolysis - drug effects
Hydrogen-Ion Concentration
Magnetic Resonance Spectroscopy
medicinal plants
Molecular Weight
Pectin
pectins
Plant Stems - chemistry
Plants, Medicinal - chemistry
Polysaccharides - chemistry
Polysaccharides - isolation & purification
Polysaccharides - pharmacology
Refractometry
structure-activity relationships
Pectin
3- O-Methylgalactose
Complement fixing activity
Acanthus ebracteatus
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Abstract Graphic Crude water-soluble polysaccharides were isolated from Acanthus ebracteatus by hot water extraction followed by ethanol precipitation after pre-treatment with 80% ethanol. The crude polysaccharides were separated into neutral and acidic polysaccharides by anion-exchange chromatography. The neutral polysaccharide (A1001) was rich in galactose, 3- O-methylgalactose and arabinose, whereas the acidic polysaccharide (A1002) consisted mainly of galacturonic acid along with rhamnose, arabinose and galactose as minor components indicating a pectin-type polysaccharide with rhamnogalacturonan type I (RG-1) backbone. 3- O-Methylgalactose is also present in the acidic fraction. Both neutral and acidic fractions showed potent effects on the complement system using pectic polysaccharide PM II from Plantago major as a positive control. A small amount of 3- O-methylgalactose present in the pectin seemed to be of importance for activity enhancement in addition to the amount of neutral sugar side chains attached to RG-1. The relationship between chemical structure and effect on the complement system of the isolated polysaccharides is considered in the light of these data. The presence of the rare monosaccharide 3- O-methylgalactose may indicate that this can be used as a chemotaxonomic marker. The traditional way of using this plant as a medical remedy appears to have a scientific basis.
AbstractList Crude water-soluble polysaccharides were isolated from Acanthus ebracteatus by hot water extraction followed by ethanol precipitation after pre-treatment with 80% ethanol. The crude polysaccharides were separated into neutral and acidic polysaccharides by anion-exchange chromatography. The neutral polysaccharide (A1001) was rich in galactose, 3-O-methylgalactose and arabinose, whereas the acidic polysaccharide (A1002) consisted mainly of galacturonic acid along with rhamnose, arabinose and galactose as minor components indicating a pectin-type polysaccharide with rhamnogalacturonan type I (RG-1) backbone. 3-O-Methylgalactose is also present in the acidic fraction. Both neutral and acidic fractions showed potent effects on the complement system using pectic polysaccharide PM II from Plantago major as a positive control. A small amount of 3-O-methylgalactose present in the pectin seemed to be of importance for activity enhancement in addition to the amount of neutral sugar side chains attached to RG-1. The relationship between chemical structure and effect on the complement system of the isolated polysaccharides is considered in the light of these data. The presence of the rare monosaccharide 3-O-methylgalactose may indicate that this can be used as a chemotaxonomic marker. The traditional way of using this plant as a medical remedy appears to have a scientific basis.
Graphic Crude water-soluble polysaccharides were isolated from Acanthus ebracteatus by hot water extraction followed by ethanol precipitation after pre-treatment with 80% ethanol. The crude polysaccharides were separated into neutral and acidic polysaccharides by anion-exchange chromatography. The neutral polysaccharide (A1001) was rich in galactose, 3- O-methylgalactose and arabinose, whereas the acidic polysaccharide (A1002) consisted mainly of galacturonic acid along with rhamnose, arabinose and galactose as minor components indicating a pectin-type polysaccharide with rhamnogalacturonan type I (RG-1) backbone. 3- O-Methylgalactose is also present in the acidic fraction. Both neutral and acidic fractions showed potent effects on the complement system using pectic polysaccharide PM II from Plantago major as a positive control. A small amount of 3- O-methylgalactose present in the pectin seemed to be of importance for activity enhancement in addition to the amount of neutral sugar side chains attached to RG-1. The relationship between chemical structure and effect on the complement system of the isolated polysaccharides is considered in the light of these data. The presence of the rare monosaccharide 3- O-methylgalactose may indicate that this can be used as a chemotaxonomic marker. The traditional way of using this plant as a medical remedy appears to have a scientific basis.
Author Harding, Stephen E
Koschella, Andreas
Michaelsen, Terje E
Heinze, Thomas
Jumel, Kornelia
Paulsen, Berit S
Hokputsa, Sanya
Inngjerdingen, Kari
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  givenname: Terje E
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  surname: Paulsen
  fullname: Paulsen, Berit S
  organization: Institute of Pharmacy, Department of Pharmacognosy PO Box 1068, Blindern, N-0316 Oslo, Norway
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Keywords Pectin
3- O-Methylgalactose
Complement fixing activity
Acanthus ebracteatus
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Snippet Graphic Crude water-soluble polysaccharides were isolated from Acanthus ebracteatus by hot water extraction followed by ethanol precipitation after...
Crude water-soluble polysaccharides were isolated from Acanthus ebracteatus by hot water extraction followed by ethanol precipitation after pre-treatment with...
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SubjectTerms 3- O-Methylgalactose
Acanthaceae - chemistry
Acanthus ebracteatus
bioactive properties
Chromatography, Gel
Chromatography, Ion Exchange
Complement Fixation Tests
Complement fixing activity
Complement System Proteins - drug effects
Gas Chromatography-Mass Spectrometry
Hemolysis - drug effects
Hydrogen-Ion Concentration
Magnetic Resonance Spectroscopy
medicinal plants
Molecular Weight
Pectin
pectins
Plant Stems - chemistry
Plants, Medicinal - chemistry
Polysaccharides - chemistry
Polysaccharides - isolation & purification
Polysaccharides - pharmacology
Refractometry
structure-activity relationships
Title Bioactive polysaccharides from the stems of the Thai medicinal plant Acanthus ebracteatus: their chemical and physical features
URI https://dx.doi.org/10.1016/j.carres.2003.11.022
https://www.ncbi.nlm.nih.gov/pubmed/14980816
https://search.proquest.com/docview/80180759
Volume 339
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