PowerPoint Presentation · 2016-07-27 · Feeding with Transformed Algae. 0 5000 10000 15000 20000...
Transcript of PowerPoint Presentation · 2016-07-27 · Feeding with Transformed Algae. 0 5000 10000 15000 20000...
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Burns Chronic wounds (Zn-polysaccharide) Skin infections
Preservatives (Ag-polysaccharide - proved) Acne (Zn-polysaccharide - proved) Skin soothing Hair treatments e.g. dandruff (Zn-polysaccharide)
Nutritional & gastrointestinal disorders Slow release of Zn
Applications of Metal ComplexesCOSMETICS
PHARMACEUTICS
NUTRACEUTICALS
Improves stability Bioavailability of metal
ion Decreases toxicity
Synergistic activity
•
Advantages
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Why in Red Microalgae ?
* The polysaccharide has biological bioactivities
* The polysaccharide is an anion-exchanger
* The polysaccharide is resistant to a wide range of: pH’s & temperatures
* The polysaccharide is not degraded by hyluronidase & carbohydrolases
* Commercial algal production is feasible
Metal Complexes
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Nutrient starvation
Physiology
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ParticipantsBen Burion University
Prof. Shosh AradProf. Yuval GolanProf. Moshe GottliebDr. Ofer DubinskyDr. Roshan ShresthaDr. Li Shi-YangDr. Edward EtesholaDr. Miri LapidotDr. Lena PlesserDr. Oshrat Levy-OntmanDr. Kalpana ShresthaDr. Marina KeidanMrina WiscousanDorit van MoppesMia BalliIrit Tzabag
University of Maryland
Prof. V.N. VakhariaProf. Yoni Zohar
Soroka Medical SchoolProf. Ron DaganProf. Yacob WeinsteinProf. Mahmud Huliel
Industries
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Cell wall formation
o Cell wall protein(s)
o Cell cycle
o Golgi involvement
o Cell wall inhibitors/mutants
o Carbon partitioning
o Sulfation
X 30,000 X 12,000
G
G
S
X 12,000
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Cell wall modified DCBresistant mutants
2,6,Dichlorbenzonitrile
Cl Cl
CN
Cl Cl
CN
DCBDCB
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Carbon Metabolism
Floridean Starch
Floridoside
14 CO2
FLORIDOSIDE Dynamic
Carbon Pool
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Matusi et al. Appl Biochem Biotechnol. 104;13-22 (2003)
Irritation Prevention
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Mixing Polysaccharide with antigen induce more Ab’s than injection of pure ovalbumin. The adjuvant effect is lower or similar to Freund’s complete adjuvant
Mice generated Antibodies when fed with transgenic
red microalgae expressing Ovalbumin or Hepatitis
Ovalbumin Hepatitis BTN
Feeding with transgenic algae generated relative higher titer of IgA (than IgG) as compared with injected Ab
Red Microalgae as Cell FactoriesIPV-VP2
Sufotransferase Erythropoietin
Proof of Concept
Immune Response
The Polysaccharide Act as an Adjuvant
Transgenic Red Algae
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Constituent
(% of dry matter)
Carbohydrates 50-70
Protein 20-40
Fatty acids 6-10
Ash 7-13
Fibers
Soluble 5-8
Insoluble 15-27
Total 20-23
Palmitic (C16:0) 36
Palmitoleic (C16:1) 3.0
Stearic (C18:0) 0.9
Oleic (C18:1) 1.9
Linoleic (C18:2) 6.8
Arachidonic (C20:4) 17.8
EPA (C20:5- w3) 34
C 18.6
Niacin 4.3
B1 0.21Thiamine
B2 0.8
Riboflavin
B6 0.06
Pyridoxine
E 1.9
Zeaxanthin 0. 5%
Na 0.4
K 0.6
Ca 1.5
Se 10
Fe 110
Mg 1100
Al 50
Zn 50
Mo 2.0
I 250
Unique combinationFatty Acids Vitamins Minerals
Biomass Composition
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Structure of phycocyanobilin (above) and phycoerythrobilin (below)attached by thioether
linkage to the apoprotein.
Visible absorption spectra of aqueous solutions of three dyes isolated from red
microalgae;a)red(pink);b)blue; c) purple.
Structure of phycocyanobilin (above) and phycoerythrobilin (below)attached by thioether
linkage to the apoprotein.
Visible absorption spectra of aqueous solutions of three dyes isolated from red
microalgae;a)red(pink);b)blue; c) purple.
PhycocyaninPhycoerythrin
Applications
Diagnostics
Cosmetics
Phycobiliproteins
A l g a l C o l o r s
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Expression in AlgaeOversulfated alginate New types of highly sulfated agar, agarose, carrageenan etc.etc.
Expression in BacteriaOversulfated polysaccharides: xanthan gum, dextran, alginate alginate
Expression in PlantsSulfated cellulose – new type of wood and paperSulfated cotton – new fabricsSulfated polysaccharides resemble heparinProtection against fungi attack
Expression of ST in other organisms has a potential to generate new materials
Algal Sulfotransferase
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16:0
18:0 18:1 18:2 18:3
18:3
desaturase
desaturase ElongaseElongase4
Desaturase
6
18:4
5
A l g a e
P l a n t s
9 Desaturase
12Desaturase
15 Desaturase
Engineering the pathway for production of EPA, AA and DHA in plants
AA
desaturase
Elongase6
desaturase6
20:3 20:4 20:5 22:5 22:6
DHA
5
EPA
SDAgLA
17desaturase
aLA
Plant-AL
Engineered PathwayProduction of EPA, AA & DHA in Plants
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Control
Transgenic algae NuclearChloroplast
Transfer MethodsGlass Beads
Bombardment
Cell State
VectorsPromoters
Gene Transfer Into Algal Cells
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Generation of anti-ovalbumin antibodies by feeding mice with transgenic algae
•••••••••••••••••
PROOF OF CONCEPT
Feeding withPure ovalbumin
Feeding withAlgal biomass
Mice were fed with algal biomass once a week (5 gr biomass powder)
O.D
. (4
50
nm
)
0.3
0.8
1.3
1.8
2.3
2.8
0 III V VII X
WTTransgenic
Weeks
0 III V VII
0.6
0.4
0.5
0.3
0.2
0.1
0
0.7
Weeks
Antibody generation after feeding
commercial ovalbumin
0.5
0.6
0.7
0.8
0.9
1
1.1
1.2
0 III V VII
No of feeding
O.D
. (6
30
nm
)
250 µg ova
2.5 mg ova
0 III V VII
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
O.D
. (4
50
nm
)
Weeks
Feeding with Transformed Algae
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0
5000
10000
15000
20000
25000
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Ant
ibod
y tit
ers
The polysaccharide act as an Adjuvant