Table 2.
Summary data table of glucagon and TNF alpha effects.
|
(i) ORO staining density in 6 d insulin treated cell subsequently exposed to glucagon or TNF alpha average percentage ORO+ cell area, normalized to starting percentage, triplicate z discs from n=50 cells | |||||||
| Time Course | Dose Response | ||||||
| Time (d) | Control | Glucagon | TNF alpha | 9 d Glucagon | ORO | 9 d TNF alpha | ORO |
| 0 | 100 | 100 | 100 | 0 | 100 | 0 | 100 |
| 1 | 96 | 96 | 89 | 100 ng/mL | 92*** | 0.1 nM | 101 |
| 2 | 98 | 92** | 66 | 1 µg/mL | 81*** | 1 nM | 96 |
| 4 | 101 | 84* | 42 | 10 µg/mL | 74*** | 10 nM | 77** |
| 8 | 96 | 80** | 38 | 100 nM | 52** | ||
| 12 | 100 | 79*** | N.D. | 1 µM | 41*** | ||
| p value relative to day 0, * p<0.05; **, p<0.01; ***, p<0.001; no symbol, >0.05. | p value relative to zero dose 0, * p<0.05; **, p< 0.01; ***, p<0.001; no symbol, p>0.05. | ||||||
|
(ii) Reversal of steatosis average percentage ORO+ cell area, triplicate z discs from n=50 cells ± SD, cells exposed to 6 d insulin then 9 d glucagon or TNF alpha) | |||||||
| 6 d insulin+9 day vehicle | +9 d glucagon | +9 d TNF alpha | |||||
| ORO% | % reversal | ORO% | % reversal | ORO% | % reversal | ||
| 100 | −3 | 100 | −11** | 100 | −31*** | ||
|
(iii) LTC4
secretion pg/1million cells, in response to IgE (l µg/ml 16h then 250 ng/ml KLH-DNP ± SD | |||||||
| 6 d insulin+9 day vehicle | +9 d glucagon | +9 d TNF alpha | |||||
| 220 ± 11.2 | 198 ± 13.6* | 106 ± 21.4*** | |||||
|
(iv) LTC4
secretion pg/1 million cells, in response to IgE (1µg/ml 16 h) then KLH-DNP ± SD |
(v) LB and SG relative abundance in response to TNF alpha treatment ORO+ % cell area and anti-tryptase+ structures/cell, mean o n=50 cells ± SD |
||||||
| KLH-DNP (ng/nl) | vehicle | 6 d TNF alpha | control | 6 d TNF alpha | |||
| 0 | 13.3 | 12.4 | ORO+% cell area | ||||
| 20 | 15.6 | 19.3 | 15.6 | 7.7** | |||
| 200 | 204.4 | 164.7** | anti-tryptase+ structures/cell | ||||
| 2000 | 309.6 | 212.5** | 16 ± 4 | 13 ± 9 | |||
|
(vi) Degranulation responses Betahexoseaminidase release as % of PMA-Ionomyin stimulated release (% max) | |||||||
| 6 d insulin+9 day vehicle | +9 d glucagon | +9 d TNF alpha | |||||
| 66.8% | 64.9% | 63.7% | |||||
(i) ORO staining density in 6 d insulin treated cells subsequently exposed to glucagon or TNF alpha. LB content was assessed using quantification of ORO-positive area in triplicate z discs from 50 cells per point. Stimuli comprised 6 day exposure to insulin (10 µg/ml) for 6 days followed by 9 day exposure (with matched passaging) to glucagon (10 µg/ml) or TNF alpha (250 nM) (unless concentrations otherwise specified). ORO-positive area at initial timepoint or zero dose was treated as 100%, then effects of stimuli were expressed as % normalized to the starting value. (ii) Comparison of the percentage reversal of 6 d insulin-induced steatosis at 9 day exposure to vehicle, versus glucagon (10 µg/ml) or TNF alpha (250 nM). (iii) Leukotriene C4 (LTC4) release in response to antigenic stimulation of the RBL2H3 via FcεRI (1 µg/ml IgE anti-DNP for 16 h followed by 250 ng/ml KLH-DNP) in cells exposed to 6 d insulin then 9 d vehicle, glucagon or TNF alpha. (iv) Leukotriene C4 (LTC4) release in response to a dose response of antigenic stimulation of the RBL2H3 via FcεRI in cells treated with no insulin, but 6 d vehicle or TNF alpha as indicated. (v) LB and SG abundance measured in cells treated with 6 d insulin or 6 d TNF alpha by ORO-positive z disc area (LB) and major anti-tryptase positive structures of >180 nM diameter and not co-localized either ER-or Golgi-specific stains (SG). (vi) Betahexoseaminidase release in response to PMA/Ionomycin expressed as percentage of maximal release in cells exposed to 6 d insulin followed by 9 d vehicle, 9 d glucagon or 9 d TNF alpha.