Suggs:Meeting Notes 10/28/05
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- TGF-B (sticky) -> SMCs differentiate
- PDGF-BB (not sticky) -> recruit SMC progenitors associate with endothelial cells -> cleaves TGF-B off site -> SMCs.
- In vivo, primary function seems to be contained in a matrix and then liberated when needed.
- Can this recruit another population of cells to form SMCs?
- Alt-Ester-Amide links. Walk a line of protein and synthetic polymer, can form secondary structure (i.e. a helix). Need doublet/triplet specificity -> polyionic gels, enzyme susceptability, GF binding, integrin binding. Commercially viable/producable pov.
- Side chains dictate everything (degrading).
- Which ones to pick?
- Evaluate structure of polymer, and behavior with other proteins, cells, etc.
- Which ones to pick?
Mena
- Linear monomer (100 mg) -> cyclic monomer
- Fabricate linear monomer prior to cyclization
- Triethyl Amine in DMF. Heat linear monomer in anhydrous environment to make cyclic.
- Cyclic monomer
- Purification protocol from patent (technical difficulties)
- Water contamination
- N2 run-out
- Continue with 2nd batch.
- Crumbly vs. Hairy? Physical precipitate, no worries.
- Purification protocol from patent (technical difficulties)
Scott
- Fibrin gels ~ 2 wks.
- LD gel, add inhibitors to prohibit degradation = toxic to cells.
- Bulk degradation
- Mechanical loss (gels become softer)
- Loss of mass = cells liberated.
- Weight loss first. Rheometers.
- Species of thrombin
- Porcine fibrin + bovine thrombine [100u 2 day decay, 50u 3 day decay]
- 8 days, no 100u, some 50u
- Porcine fibrin + human thrombin
- Fibrin -> mechanical cross-link
- Thrombin -> coagulation protein - fibrinogen -> fibrin
- Porcine fibrin + bovine thrombine [100u 2 day decay, 50u 3 day decay]
- Tabulate ranges of fibrinogen and thrombin.
- Back off on thrombin!!!
Charlie
- TGF-B from fibrin gels, (new literature) stimulate actin/myosin for smooth muscle cell differentiation.
- Release kinetics.
- Differentiation protocols = 1-2 weeks.
- During mass loss, TGF-B dump.
- Goal: Constant release over full time, then go away.
- Proteonomics. Protein expression in gels.
Office Space
- Charlie, Jessica upstairs.
- Scott stays in Basement.
- Computers move to old-Charlie space.
- Free space around Mena area.