Schwann cell dependence of regenerating rat sensory neurons is inversely related to the quality of axon growth substratum

被引:9
作者
Bajrovic, F [1 ]
Srpcic, M [1 ]
Sketelj, J [1 ]
机构
[1] Univ Ljubljana, Fac Med, Inst Pathophysiol, Ljubljana 1000, Slovenia
关键词
basal lamina; collateral sprouting; nerve crush; peripheral nerve; regeneration; Schwann cells; sensory axons;
D O I
10.1093/jnen/60.1.65
中图分类号
R74 [神经病学与精神病学];
学科分类号
摘要
It is still controversial to what extent elongation of regenerating sensory axons depends on proliferating Schwann cells (SCs) in an injured peripheral nerve. We hypothesized that such regeneration was independent of SC support early after nerve injury, but later became SC-dependent. The sural nerve in rats was crushed, and freezing destroyed cells but not their basal laminae (BL) in the distal nerve segment. Sensory axon elongation was assessed by the nerve pinch test and their abundance was examined immunohistochemically. Sensory axons regenerated fairly rapidly during the first week even if SC migration was prevented. Thereafter they ceased to elongate and withdrew until their terminals contacted the SCs migrating from the proximal nerve segment. Intrinsic neuronal capacity for growth without cell support, however, had not been lost. Rather, progressive degradation of the former SC BL and loss of laminin in the acellular segment arrested axon growth. Further elongation occurred only when SC migration was possible, corroborating our hypothesis. Sensory neurons continued to elongate and maintain their axons in spite of deteriorating growth substratum if, prior to injury the axons had been allowed to sprout into the denervated skin. Previous sprouting exposed the sensory neurons to high levels of NGF.
引用
收藏
页码:65 / 74
页数:10
相关论文
共 39 条
[1]   OVEREXPRESSION OF THE NEURAL GROWTH-ASSOCIATED PROTEIN GAP-43 INDUCES NERVE SPROUTING IN THE ADULT NERVOUS-SYSTEM OF TRANSGENIC MICE [J].
AIGNER, L ;
ARBER, S ;
KAPFHAMMER, JP ;
LAUX, T ;
SCHNEIDER, C ;
BOTTERI, F ;
BRENNER, HR ;
CARONI, P .
CELL, 1995, 83 (02) :269-278
[2]   LONG-TERM EFFECTS OF DEPRIVATION OF CELL SUPPORT IN THE DISTAL STUMP ON PERIPHERAL-NERVE REGENERATION [J].
BAJROVIC, F ;
BRESJANAC, M ;
SKETELJ, J .
JOURNAL OF NEUROSCIENCE RESEARCH, 1994, 39 (01) :23-30
[3]   NERVE GROWTH-FACTOR, LAMININ, AND FIBRONECTIN PROMOTE NEURITE GROWTH IN HUMAN-FETAL SENSORY GANGLIA CULTURES [J].
BARONVANEVERCOOREN, A ;
KLEINMAN, HK ;
OHNO, S ;
MARANGOS, P ;
SCHWARTZ, JP ;
DUBOISDALCQ, ME .
JOURNAL OF NEUROSCIENCE RESEARCH, 1982, 8 (2-3) :179-193
[4]  
Bisby Mark A., 1995, P553
[5]   NEURITE-PROMOTING INFLUENCES OF PROLIFERATING SCHWANN-CELLS AND TARGET-TISSUES ARE NOT PREREQUISITE FOR RAPID AXONAL ELONGATION AFTER NERVE CRUSH [J].
BRESJANAC, M ;
SKETELJ, J .
JOURNAL OF NEUROSCIENCE RESEARCH, 1989, 24 (04) :501-507
[6]  
BRESJANAC M, 1991, ANN NY ACAD SCI, V633, P570
[7]  
BRESJANAC M, 1998, ECCN 98, P29
[8]   NERVE-MUSCLE SANDWICH GRAFTS - THE IMPORTANCE OF SCHWANN-CELLS IN PERIPHERAL-NERVE REGENERATION THROUGH MUSCLE BASAL LAMINA CONDUITS [J].
CALDER, JS ;
GREEN, CJ .
JOURNAL OF HAND SURGERY-BRITISH AND EUROPEAN VOLUME, 1995, 20B (04) :423-428
[9]   THE DOWN-REGULATION OF GAP-43 IS NOT RESPONSIBLE FOR THE FAILURE OF REGENERATION IN FREEZE-KILLED NERVE GRAFTS IN THE RAT [J].
CHONG, MS ;
WOOLF, CJ ;
ANDREWS, P ;
TURMAINE, M ;
SCHREYER, DJ ;
ANDERSON, PN .
EXPERIMENTAL NEUROLOGY, 1994, 129 (02) :311-320
[10]  
Culican SM, 1998, J NEUROSCI, V18, P4953