MicroRNA‑106b regulates skeletal muscle insulin sensitivity and glucose homeostasis by targeting mitofusion‑2. 2017

Ying Zhang, and Wei He, and Yuan-Fu Gao, and Zhong-Min Fan, and Chun-Lin Gao, and Zheng-Kun Xia
Department of Pediatrics, Jinling Hospital, Nanjing University School of Medicine, Nanjing, Jiangsu 210002, P.R. China.

MicroRNA‑106b (miR‑106b) is reported to be closely associated with skeletal muscle insulin resistance. The present study further investigated the role of miR‑106b in skeletal muscle insulin sensitivity and glucose homeostasis in vivo. Mice were randomly divided into 4 groups and infected with lentivirus expressing miR‑106b (miR‑106b mice), miR‑106b sponge (miR‑106b inhibition mice) or the corresponding empty vectors. Mitofusion‑2 (Mfn2) protein expression levels and glucose transporter (Glut)‑4 protein translocation were significantly reduced in the muscle of miR‑106b mice, whereas they were unaffected in miR‑106b inhibition mice. miR‑106b mice had significantly increased blood glucose levels following 12 h of fasting and impaired glucose tolerance, whereas miR‑106b inhibition mice had no significant alterations in fasting blood glucose levels and glucose tolerance. In vitro, the suppressive effect of miR‑106b on glucose uptake and Glut4 translocation was completely inhibited in C2C12 myotubes infected with Mfn2 plasmids. Following treatment of C2C12 myotubes with Mfn2 small interfering RNA, miR‑106b inhibition consistently increased Mfn2 protein levels and improved glucose uptake and Glut4 translocation. These results indicated that miR‑106b targeted Mfn2 and regulated skeletal muscle insulin sensitivity and glucose tolerance. Therefore, increased miR‑106b expression may be a potential mechanism underlying insulin resistance and type 2 diabetes.

UI MeSH Term Description Entries
D007333 Insulin Resistance Diminished effectiveness of INSULIN in lowering blood sugar levels: requiring the use of 200 units or more of insulin per day to prevent HYPERGLYCEMIA or KETOSIS. Insulin Sensitivity,Resistance, Insulin,Sensitivity, Insulin
D008297 Male Males
D008810 Mice, Inbred C57BL One of the first INBRED MOUSE STRAINS to be sequenced. This strain is commonly used as genetic background for transgenic mouse models. Refractory to many tumors, this strain is also preferred model for studying role of genetic variations in development of diseases. Mice, C57BL,Mouse, C57BL,Mouse, Inbred C57BL,C57BL Mice,C57BL Mice, Inbred,C57BL Mouse,C57BL Mouse, Inbred,Inbred C57BL Mice,Inbred C57BL Mouse
D002460 Cell Line Established cell cultures that have the potential to propagate indefinitely. Cell Lines,Line, Cell,Lines, Cell
D005947 Glucose A primary source of energy for living organisms. It is naturally occurring and is found in fruits and other parts of plants in its free state. It is used therapeutically in fluid and nutrient replacement. Dextrose,Anhydrous Dextrose,D-Glucose,Glucose Monohydrate,Glucose, (DL)-Isomer,Glucose, (alpha-D)-Isomer,Glucose, (beta-D)-Isomer,D Glucose,Dextrose, Anhydrous,Monohydrate, Glucose
D000070416 Antagomirs Chemically-engineered oligonucleotides used to selectively inhibit expression of target genes through sequence-specific binding of corresponding microRNA (miRNA) sites. Antagomir,Anti-miR,Anti-miRs,Blockmirs,Anti miR,Anti miRs
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D051275 Glucose Transporter Type 4 A glucose transport protein found in mature MUSCLE CELLS and ADIPOCYTES. It promotes transport of glucose from the BLOOD into target TISSUES. The inactive form of the protein is localized in CYTOPLASMIC VESICLES. In response to INSULIN, it is translocated to the PLASMA MEMBRANE where it facilitates glucose uptake. GLUT-4 Protein,GLUT4 Protein,Insulin-Responsive Glucose Transporter,SLC2A4 Protein,Solute Carrier Family 2, Facilitated Glucose Transporter, Member 4 Protein,GLUT 4 Protein,Glucose Transporter, Insulin-Responsive,Insulin Responsive Glucose Transporter
D051379 Mice The common name for the genus Mus. Mice, House,Mus,Mus musculus,Mice, Laboratory,Mouse,Mouse, House,Mouse, Laboratory,Mouse, Swiss,Mus domesticus,Mus musculus domesticus,Swiss Mice,House Mice,House Mouse,Laboratory Mice,Laboratory Mouse,Mice, Swiss,Swiss Mouse,domesticus, Mus musculus
D018482 Muscle, Skeletal A subtype of striated muscle, attached by TENDONS to the SKELETON. Skeletal muscles are innervated and their movement can be consciously controlled. They are also called voluntary muscles. Anterior Tibial Muscle,Gastrocnemius Muscle,Muscle, Voluntary,Plantaris Muscle,Skeletal Muscle,Soleus Muscle,Muscle, Anterior Tibial,Muscle, Gastrocnemius,Muscle, Plantaris,Muscle, Soleus,Muscles, Skeletal,Muscles, Voluntary,Skeletal Muscles,Tibial Muscle, Anterior,Voluntary Muscle,Voluntary Muscles

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