Talk:20.109(S14):Initiate cell culture (Day2)

Plan for Day 2

Group 1 should arrive by 1:05 pm at the latest and immediately go to the tissue culture room. When everyone has arrived, we will thaw your cells in the water bath. After you have finished your culture preparations (ideally by 3 pm), you can take a 10 minute break to refresh your minds, and then will take a short quiz.

Group 2 should arrive by 2:45 pm at the latest and will begin by taking the quiz. If all goes well, you will begin working in the tissue culture room at 3 pm. If your culture preparations that involve a special physical set-up, you can come earlier and work in the extra tissue culture hood.

Note that you may be asked to switch your group number based on grouping together people working with the same type of cells, asking people who need special reagents/equipment to go in the second group, etc.

T/R

Arrival time (at latest!)	1:05 pm	2:45 pm
Team color 1	Red
Team color 2	Orange	Blue/Green!
Team color 3	Yellow/Pink

W/F

Arrival time (at latest!)	1:05 pm	2:45 pm
Team color 1	Yellow	White
Team color 2	Orange	Pink
Team color 3	Red	Silver
Team color 4	Blue
Team color 5	Green

Designs (T/R)

Green/Blue (CB/CR, KT/MG)

Research has revealed that estrogen-related receptor γ (ERRγ) negatively regulates chondrocyte proliferation in vivo in transgenic mice, but no literature was found on the effects of ERRγ on in vitro mesenchymal stem cell (MSC) differentiation. Therefore, we will be testing the effects of different concentrations (0μM, 0.5μM, 1.0μM, and 5.0μM) of 4-hydroxytamoxifen, an inhibitor of ERRγ, on MSC differentiation. We predict that increasing the dose of tamoxifen will increase the amount of differentiation in our cells because it will inhibit the ERRγ and induce chondrocyte proliferation . Because the tamoxifen needs to be solubilized in ethanol, we need to make sure that an equal volume is added for each concentration dose, as different volumes of ethanol may cause a variation in cell viability among samples.

Red/Orange (AN/CT, AK/LT)

To mimic osteoarthritis joints, we will add 400 ug/mL fibronectin. (http://www.sciencedirect.com/science/article/pii/S1063458404001347). We will add ADAMTS-5 aggrecanase inhibitor (http://www.emdmillipore.com/life-science-research/adamts-5-inhibitor/EMD_BIO-114810/p_tCSb.s1L7sgAAAEW0mEfVhTm) at concentrations of 0, 2, 7, and 10 uM (IC-50 = 1.1) after 2 days to 1 mL total volume for each culture. The time delay will allow us to evaluate cell growth before the inhibitor is added. Aggrecans are responsible for chondrocyte-chondrocyte and chondrocyte-matrix interactions, and are critical for cartilage structure. Therefore, the misbehavior of aggrecanase, the enzyme that breaks down aggrecan, would result in weakened cartilage structure. We expect the inhibitor of aggrecanase, ADAMTS-5, to cause more cells to adhere to the scaffold, thus when applied to an OA model, decreases symptoms. We expect that the most chondrocyte-like cells after 9 days will be cells cultured with 10 uM inhibitor, followed by 7 nM, 2 nM, and finally 0 nM.

Designs (W/F)

White/Silver Research has shown that presence of Collagen I or Collagen II makes mesenchymal stem cell (MSC) differentiation more effective. While it was shown that Collagen II is more effective than Collagen I, it was not shown what concentrations were most effective. Therefore, we will be testing the effects of Collagen II concentration on MSC differentiation, by mixing alginate beads with volumes of 0, 50, 250, and 500 μL of collagen II (final concentrations currently unknown, as they are dependant on what stock is available).