REVERSAL OF MUSCLE DIFFERENTIATION DURING URODELE LIMB REGENERATION

被引:203
作者
LO, DC
ALLEN, F
BROCKES, JP
机构
[1] UCL, LUDWIG INST CANC RES, 91 RIDING HOUSE ST, LONDON W1P 8BT, ENGLAND
[2] UCL, DEPT BIOCHEM & MOLEC BIOL, LONDON W1P 8BT, ENGLAND
关键词
D O I
10.1073/pnas.90.15.7230
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Recent studies suggest that maintenance of the differentiated state requires continuous regulation. Limb regeneration in urodele amphibians provides a context in which to address this issue, as limb regeneration may involve the dedifferentiation of multinucleate myotubes to yield mononucleate blastemal cells, which then proliferate and contribute to regenerate tissues. To evaluate this possibility, cultured newt limb myotubes were selectively microinjected with the lineage tracer rhodamine-dextran and introduced into regenerating limbs. In culture, such labeled myotubes were stable after 6-8 weeks, and transfer of the tracer to mononucleate cells was not observed. In contrast, after implantation of labeled myotubes under the wound epidermis of limb blastemas, strongly labeled mononucleate cells were observed after 1 week. These cells could be double-labeled with the cytoplasmic lineage tracer and [H-3]thymidine that had been incorporated into the nuclei of implanted myotubes. The number of labeled mononucleate cells increased significantly by 2-3 weeks after implantation, indicating that these cells proliferated. Although the fate of these cells at later times was uncertain, we provide evidence consistent with their subsequent differentiation. These results demonstrate reversal in the mononucleate-to-multinucleate transition of vertebrate myogenesis.
引用
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页码:7230 / 7234
页数:5
相关论文
共 19 条
[1]   CELL LINEAGE ANALYSIS REVEALS MULTIPOTENCY OF SOME AVIAN NEURAL CREST CELLS [J].
BRONNERFRASER, M ;
FRASER, SE .
NATURE, 1988, 335 (6186) :161-164
[2]   MAKING MUSCLE IN MAMMALS [J].
BUCKINGHAM, M .
TRENDS IN GENETICS, 1992, 8 (04) :144-149
[3]   EVIDENCE THAT RESERVE CELLS ARE A SOURCE OF REGENERATED ADULT NEWT MUSCLE INVITRO [J].
CAMERON, JA ;
HILGERS, AR ;
HINTERBERGER, TJ .
NATURE, 1986, 321 (6070) :607-610
[4]  
CASIMIR CM, 1988, DEVELOPMENT, V104, P657
[5]   Myogenesis and developmental control genes [J].
Emerson, C. P. .
CURRENT OPINION IN CELL BIOLOGY, 1990, 2 (06) :1065-1075
[6]   CULTURE OF NEWT CELLS FROM DIFFERENT TISSUES AND THEIR EXPRESSION OF A REGENERATION-ASSOCIATED ANTIGEN [J].
FERRETTI, P ;
BROCKES, JP .
JOURNAL OF EXPERIMENTAL ZOOLOGY, 1988, 247 (01) :77-91
[7]   IMPROVED FLUORESCENT COMPOUNDS FOR TRACING CELL LINEAGE [J].
GIMLICH, RL ;
BRAUN, J .
DEVELOPMENTAL BIOLOGY, 1985, 109 (02) :509-&
[8]  
GRIFFIN KJP, 1987, DEVELOPMENT, V101, P267
[9]   INTERACTION OF MYOGENIC FACTORS AND THE RETINOBLASTOMA PROTEIN MEDIATES MUSCLE-CELL COMMITMENT AND DIFFERENTIATION [J].
GU, W ;
SCHNEIDER, JW ;
CONDORELLI, G ;
KAUSHAL, S ;
MAHDAVI, V ;
NADALGINARD, B .
CELL, 1993, 72 (03) :309-324