Project description:Global gene expression of the rat soleus muscle was assessed with microarrays after 12 hrs of physical inactivity and also after 12 hours of physical inactivity immediately followed by 2 hrs treadmill walking and compared to normally caged rats with voluntary standing and intermittent cage movements. Keywords: between group design
Project description:Global gene expression of the rat soleus muscle was assessed with microarrays after 11 days of intermittent physical inactivity (10 hr/day) and compared to normally caged rats with voluntary standing and intermittent cage movements. Keywords: between group design
Project description:Global gene expression of the rat soleus muscle was assessed with microarrays after 11 days of intermittent physical inactivity (10 hr/day) and compared to normally caged rats with voluntary standing and intermittent cage movements. Experiment Overall Design: Rats were prevented from standing on the their hindlimbs for 10 hrs/day for 11 days and compared to caged rats with normal standing/ambulatory activity. RNA was extracted from soleus muscles and each array represents the pooling of the RNA from the soleus of 4-5 different rats.
Project description:Global gene expression of the rat soleus muscle was assessed with microarrays after 12 hrs of physical inactivity and also after 12 hours of physical inactivity immediately followed by 2 hrs treadmill walking and compared to normally caged rats with voluntary standing and intermittent cage movements. Experiment Overall Design: Rats were either prevented from standing on the their hindlimbs for 12 hrs or were prevented from standing on the their hindlimbs for 12 hrs and then immediately engaged in 2 hours treadmill walking and compared to caged rats with normal standing/ambulatory activity. RNA was extracted from soleus muscles and each array represents the pooling of the RNA from the soleus of 8-10 different rats.
Project description:Knee osteoarthritis (KOA), as a degenerative multifactorial disease, affects the quality of life and mental health of patients, and also brings a huge socioeconomic burden. Treating synovitis have shown promise as anti-inflammatory therapeutics in mitigating OA symptoms and disease progression. Here, by analysing synovial single-cell sequencing (scRNA-seq) data from KOA, we found that synovial fibroblasts (FLS) in OA synovium showed a distinct pro-inflammatory phenotype. We collected synovial tissue from patients with clinical OA as well as from healthy donors, and histological examination was consistent with findings in scRNA-seq. Inspired by recent cross-tissue fibroblast lineage studies, we identified by sequencing that healthy FLS in synovial tissues share transcriptome-level similarities with dermal fibroblasts (DFb). Subsequently, we revealed the local as well as systemic distribution of intra-articular injected DFbs by constructing/extracting two types of rat fibroblasts (luciferase DFbs as well as GFP DFbs). The results demonstrate that DFbs can be locally retained in the synovium for up to three weeks following targeted engrafting on it. And intra-articular injection does not result in DFbs migration to vital organs or the occurrence of histological changes in these organs. A rat model of KOA was constructed by anterior cruciate ligament transection (ACLT) in order to study the therapeutic effect of DFbs on KOA. After injection, the rats showed improvement in painful gait. In addition, histological as well as imaging results showed reduced synovitis and improvement in articular cartilage. Finally we verified the protective effect of DFbs on cytokine-stimulated chondrocytes in a co-culture system.