Microsoft word - 2008 dec 22 fulvimed sol 396 - 401 report _2_.doc
Anti-diabetic assessment of Solutions #396 to #401
Testing Institution Diabetes Discovery Platform, South African Medical Research Council, Tygerberg, 7505, South Africa.
22 December 2008
Testing Institution Diabetes Discovery Platform, South African Medical Research Council, Tygerberg, 7505, South Africa. OBJECTIVE To investigate the in vitro glucose uptake by C2C12 muscle and Chang liver cells fol owing exposure to solution # 396 - #401 samples supplied by Fulvimed. Solution samples tested
¾ Sol 396 [concentration 5.3%] ¾ Sol 397 [concentration 6.8%] ¾ Sol 398 [concentration 8% ] ¾ Sol 399 [concentration 3.2%] ¾ Sol 400 [concentration 4% ] ¾ Sol 401 [concentration 5.2%]
In vitro Cell Culture Models
Solutions were tested in a C2C12 muscle cell in vitro glucose uptake model For glucose uptake experiments cells were exposed to the relevant solutions at a concentration of 0.05 µg/µl, metformin or insulin at concentration of 1 µM in serum-free media supplemented with 8 mM glucose for one hour. Thereafter, the glucose concentration in the media was determined by a colourometric glucose oxidase method (Biovision Inc, USA). Solutions were tested in a Chang liver cell in vitro glucose uptake model Solutions were added to fresh culture media at a concentration of 0.05 µg/µl and cultured on Chang cells for three days prior to performing the glucose uptake experiments. As positive controls metformin or insulin were added to the media at concentration of 1 µM. Acute glucose uptake was performed after exposing the Chang cells to fresh serum-free media with 8 mM glucose, supplemented with either metformin, insulin as controls and the relevant solutions for three (3) hours. Thereafter, the glucose concentration in the media was determined by a colourometric glucose oxidase method (Biovision Inc, USA). Results: C2C12 muscle cell glucose uptake
C2C12 muscle cell glucose uptake %
The above graph shows the percentage glucose uptake from the culture media
supplemented with 8 mM glucose by C2C12 cells over one (1) hour.
C2C12 muscle cell glucose uptake data
Glucose conc. Glucose Uptake (nM/ul) SD (nM/ul) % increase Metformin
The above table shows the glucose uptake data of C2C12 cells following 1 hour exposure with the relevant solutions in serum free media containing 8 mM
glucose. The glucose concentration column represents the glucose concentration remaining in the media fol owing one (1) hour exposure to the cells. The glucose uptake column represents the glucose uptake from the media during the 1 hour exposure. SD represents the standard deviation. The percentage increases calculated from the relevant solvent vehicle and the P= values are reflected in the last two columns respectively. Chang liver cell glucose uptake
Chang liver cell glucose uptake % ose uptake % c lu G
The above graph shows the percentage glucose uptake from the culture media supplemented with 8 mM glucose by Chang cells over a three (3) hour period. Chang cells were pre-exposed to the solutions tested for 3 days prior to the glucose uptake experiments.
Chang Liver Cell: Glucose Uptake Data
The above table shows the glucose uptake data of Chang liver cells fol owing 3 days of pre-sensitization with the relevant solutions, followed by a 3 hour glucose uptake assay with media containing 8 mM glucose. The glucose concentration column represents the glucose concentration remaining in the media following three (3) hour exposure to the cells. The glucose uptake column represents glucose uptake from the media during a 3 hour exposure. SD represents the standard deviation. The percentage increases calculated from the relevant solvent vehicle and the P= values are reflected in the last two columns respectively.
Discussion of Results
Solutions 398, 399, 400 and 401 induced statistically significant increases in the
glucose uptake of the C2C12 muscle cel s in culture. The increase in the glucose
uptake was comparable to that of metformin an established anti-diabetic agent.
In the Chang liver cells solutions 397, 398, 400 and 401 induced statistically
significant increases in the glucose uptake (p≤0.0005). The respective solutions
induced an increase in glucose uptake similar to that achieved by insulin or
Conclusion
• The solutions tested significantly enhanced glucose uptake both in the
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