Animals (n = 7) were given 2.5% DSS in drinking water for 5 days and then no treatment for 14 days as one cycle; this process was repeated for three cycles. In the last cycle, 2% DSS water treated to each group and no treatment for 14 days. During the three DSS cycle, 3 mg/kg bromelain were injected daily intraperitoneally and colon and spleen tissues were harvested after three DSS cycle in 57 days to study polyp burden and to perform histological staining.

Male Sprague-Dawley rats (200-220 g) were purchased from Weitonglihua Company (Beijing, China) and maintained in a pathogen-free facility. After one week of adaptive feeding, a total of 30 rats were randomly divided into 3 groups (n = 10 rats/group): a control group; bleomycin (BLM) group; and BLM + sh-ZFAS1 group. Rats in the BLM group were administered 5 mg/kg BLM (Nippon Kayaku, Japan) dissolved in phosphate buffered saline (PBS) and administered to the rats intratracheally to establish the PF model. Rats in the control group were treated with 0.05 mL PBS. Rats in the BLM + sh-ZFAS1 group were injected intraperitoneally with 30 uL lncRNA ZFAS1 shRNA adeno-associated virus 5 (Vigene Biosciences, USA) for 3 weeks prior to an injection of 5 mg/kg BLM sulfate.

To simulate the animal model of diabetic cardiomyopathy, male db/+ mice and db/db mice (age, 7 weeks, weight, 24 g) were fed a normal diet for 4 weeks and kept at 24 under a 14-h light/8-h dark cycle. The animals were purchased from the Model Animal Research Center of Nanjing University (Nanjing, China). Diabetic mice were intracoronarily administered equal volumes (80 ul) of adenoviruses Ad-ZFAS1, Ad-sh-ZFAS1, Ad-CCND2, Ad-sh-CCND2 or Ad-NC.33 miR-150-5p mimics and mimic control (NC) were injected into the tail vein of mice (50 ug/kg) every 15 days for 12 weeks. Db/db mice were treated with or without ferrostatin-1 (Fer-1, ferroptosis inhibitor; Sigma-Aldrich, 5 mg/kg) for an additional 12 weeks.

To simulate the animal model of diabetic cardiomyopathy, male db/+ mice and db/db mice (age, 7 weeks, weight, 24 g) were fed a normal diet for 4 weeks and kept at 24 under a 14-h light/8-h dark cycle. The animals were purchased from the Model Animal Research Center of Nanjing University (Nanjing, China). Diabetic mice were intracoronarily administered equal volumes (80 ul) of adenoviruses Ad-ZFAS1, Ad-sh-ZFAS1, Ad-CCND2, Ad-sh-CCND2 or Ad-NC.33 miR-150-5p mimics and mimic control (NC) were injected into the tail vein of mice (50 ug/kg) every 15 days for 12 weeks. Db/db mice were treated with or without ferrostatin-1 (Fer-1, ferroptosis inhibitor; Sigma-Aldrich, 5 mg/kg) for an additional 12 weeks.