PMID- 12115949 OWN - NLM STAT- MEDLINE DCOM- 20020805 LR - 20091119 IS - 0148-639X (Print) IS - 0148-639X (Linking) VI - 26 IP - 1 DP - 2002 Jul TI - IGF-I, IGF-II, and IGF-receptor-1 transcript and IGF-II protein expression in myostatin knockout mice tissues. PG - 55-63 AB - Semiquantitative reverse transcriptase-polymerase chain reaction (RT-PCR) and immunohistochemistry were performed to demonstrate whether a correlation exists between insulin-like growth factors (IGFs)-positive regulators of growth-and myostatin, a negative regulator of muscle growth. IGF-I, -II, and IGF-receptor-1 (IGF-R1) mRNA and IGF-II protein expressions were determined in control and myostatin knockout mice tissues. IGF-I gene expressions were similar between control and knockout mice tissues, whereas IGF-II mRNA levels were significantly higher in myostatin knockout mice kidney and soleus muscles than those of control mice (P <.01). IGF-R1 mRNA levels from control mice heart (P <.05) and kidney (P <.01) were significantly higher than in myostatin knockout mice, whereas levels were lower in pectoralis muscle of control mice than knockout mice (P <.01). The strongly IGF-II-positive cells in soleus muscle were more common in myostatin knockout mice and were seen in a few foci in control mice. IGF-II immunoreactivity in both control and myostatin knockout mice kidneys was localized to the epithelium of renal tubules and collecting ducts. Reciprocal changes in the expression of myostatin and IGF-II and IGF-R1 may underlie normal growth of skeletal muscle and other organs in mammals, and the changes in these tissues associated with disease. CI - Copyright 2002 Wiley Periodicals, Inc. FAU - Kocamis, Hakan AU - Kocamis H AD - Division of Histology and Embryology, Kafkas University, Kars, Turkey. FAU - Gahr, Scott A AU - Gahr SA FAU - Batelli, Lori AU - Batelli L FAU - Hubbs, Ann F AU - Hubbs AF FAU - Killefer, John AU - Killefer J LA - eng PT - Journal Article PT - Research Support, U.S. Gov't, Non-P.H.S. PL - United States TA - Muscle Nerve JT - Muscle & nerve JID - 7803146 RN - 0 (Actins) RN - 0 (Mstn protein, mouse) RN - 0 (Myostatin) RN - 0 (RNA, Messenger) RN - 0 (Transforming Growth Factor beta) RN - 67763-96-6 (Insulin-Like Growth Factor I) RN - 67763-97-7 (Insulin-Like Growth Factor II) RN - EC 2.7.10.1 (Receptor, IGF Type 1) SB - IM MH - Actins/genetics/metabolism MH - Animals MH - Brain/metabolism MH - Immunohistochemistry MH - Insulin-Like Growth Factor I/*genetics/metabolism MH - Insulin-Like Growth Factor II/genetics/*metabolism MH - Kidney/cytology/metabolism MH - Liver/metabolism MH - Male MH - Mice MH - Mice, Inbred C57BL MH - Mice, Knockout MH - Muscle, Skeletal/cytology/metabolism MH - Myocardium/metabolism MH - Myostatin MH - Organ Specificity MH - RNA, Messenger/*metabolism MH - Receptor, IGF Type 1/*genetics/metabolism MH - Reverse Transcriptase Polymerase Chain Reaction MH - Transforming Growth Factor beta/*deficiency/genetics EDAT- 2002/07/13 10:00 MHDA- 2002/08/06 10:01 CRDT- 2002/07/13 10:00 PHST- 2002/07/13 10:00 [pubmed] PHST- 2002/08/06 10:01 [medline] PHST- 2002/07/13 10:00 [entrez] AID - 10.1002/mus.10160 [doi] PST - ppublish SO - Muscle Nerve. 2002 Jul;26(1):55-63. doi: 10.1002/mus.10160.