"Blood Substitutes"(Milligan)
"Blood Substitutes"(Milligan)
"Blood Substitutes"(Milligan)
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Sources of Hemoglobin<br />
Hemoglobin Explanation Advantages Disadvantages<br />
Human <strong>Blood</strong><br />
Cow <strong>Blood</strong><br />
Microorganisms<br />
Transgenic<br />
Involves extraction<br />
of Hb from donor<br />
blood<br />
Uses Hb from cow<br />
blood<br />
Genetically-modified<br />
bacteria & some<br />
plants can be made<br />
to produce Hb<br />
Genes for human<br />
Hb inserted into a<br />
developing animal<br />
Cheap; uses<br />
discarded blood<br />
Cheap, plentiful.<br />
Less chemical<br />
modifications.<br />
Acceptable to JW’s<br />
Infinite supply.<br />
Avoids human<br />
blood. Pure, virusfree<br />
Hb<br />
Potential infinite<br />
supply of large<br />
quantities of Hb<br />
Supply of waste<br />
blood diminishing.<br />
Unacceptable to<br />
JW’s<br />
Unknown long-term<br />
effects.<br />
BSE cows & CJD<br />
High production<br />
costs<br />
Ethical objections to<br />
‘Hb factories’. Hb<br />
extraction difficulties
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