Journal: bioRxiv
Article Title: Inhibition of Mitochondrial Fission and iNOS in the Dorsal Vagal Complex Protects from Overeating and Weight Gain
doi: 10.1101/2020.06.26.173641
Figure Lengend Snippet: Rats were fed for 28 days with HFD or control RC diet. On day 28 rats received DVC surgery. ShControl (ShC) and ShiNOS (ShI) virus were injected on surgery day while the GFP and Drp1-K38A viruses where injected on day 29. Acute feeding study was preformed 8 and 14 days after surgery (see Fig S3). (A) Body weight increase over 4-weeks in HFD-fed compared to RC fed animals (B) Cumulative food intake over the 4-weeks pre-surgery. Values are multiplied by calories of diet: 3.93Kcal/g RC, 5.51Kcal/g HFD. (A-B) Data are expressed as mean ± SEM, n=10 RC, n=24 HFD (C) Blood glucose pre-surgery. Bar charts represent mean ± SEM of individual rats shown as single points. (D and E) Acute feeding study in GFP and Drp1-K38A expressing animals (D) and ShC and ShI expressing animals (E). Graph shows the total food intake at 4 hours. Bar charts represent mean ± SEM of individual rats shown as single points (n=5 for RC GFP vehicle, n=5 RC GFP insulin, n=9 for HFD GFP vehicle, n=6 for HFD GFP insulin, n=8 for HFD Drp1-K38A vehicle, n=6 for HFD Drp1-K38A insulin; n=6 RC ShC insulin, n=6 for HFD ShCl vehicle, n=5 for HFD ShC insulin, n=7 for HFD ShI vehicle, n=5 for HFD ShI insulin). (F and H) Cumulative food intake starting from the day after surgery. (G and I) Body weight increase starting from the day after surgery (G). (J and K) Total white adipose tissue (sum of epididymal, retroperitoneal and visceral fat) collected on the day of sacrifice. Data are expressed as mean ± SEM, of n=5 GFP RC, n=6 GFP HFD, n=10 Drp1-K38A HFD (F, G and L) and of n=8 ShC RC, n=8 ShC HFD, n=7 ShI HFD (H, I, K). (L and M) Average blood glucose over 14 days of the study, data is an average of sampled readings taken before feeding studies and day of sacrifice. Data are expressed as mean ± SEM, n=6 GFP RC, n=15 GFP HFD, n=12 Drp1-K38A HFD and n=9 for ShC RC, ShC HFD, ShI HFD. *p <0.05, **p <0.01, *** p<0.001.
Article Snippet: On day 0 a lentiviral system was used to deliver ShRNA to knockdown of iNOS (shiNOS) or a control scramble ShRNA (shControl) (Santa Cruz Biotechnology, sc-29417-V and sc-108080 respectively) or on day 1 an adenoviral system was used to deliver either a constitutively active form of Drp1 (Drp1-S637A); a catalytically inactive form of Drp1 (Drp1-K38A) or a control of GFP expressed under CMV ( Filippi et al , 2017 ) or GFAP promoters.
Techniques: Control, Virus, Injection, Expressing