scholarly journals Embryonic Substantia Nigra Grafts Show Directional Outgrowth to Cografted Striatal Grafts and Potential for Pathway Reconstruction in Nonhuman Primate

2008 ◽  
Vol 17 (4) ◽  
pp. 427-444 ◽  
Author(s):  
J. R. Sladek ◽  
K. B. Bjugstad ◽  
T. J. Collier ◽  
E. A. Bundock ◽  
B. C. Blanchard ◽  
...  
2002 ◽  
Vol 176 (1) ◽  
pp. 117-121 ◽  
Author(s):  
Mattias Kettner ◽  
Dirk Willwohl ◽  
Gene B. Hubbard ◽  
U. Rüb ◽  
Edward J. Dick ◽  
...  

2012 ◽  
Vol 2012 ◽  
pp. 1-10 ◽  
Author(s):  
Christopher A. Lieu ◽  
Kala Venkiteswaran ◽  
Timothy P. Gilmour ◽  
Anand N. Rao ◽  
Andrew C. Petticoffer ◽  
...  

Chronic treatment with levodopa (LD) in Parkinson's disease (PD) can cause drug induced dyskinesias.Mucuna pruriensendocarp powder (MPEP) contains several compounds including natural LD and has been reported to not cause drug-induced dyskinesias. We evaluated the effects ofMucuna pruriensto determine if its underlying mechanistic actions are exclusively due to LD. We first compared MPEP with and without carbidopa (CD), and LD+CD in hemiparkinsonian (HP) monkeys. Each treatment ameliorated parkinsonism. We then compared the neuronal firing properties of the substantia nigra reticulata (SNR) and subthalamic nucleus (STN) in HP monkeys with MPEP+CD and LD+CD to evaluate basal ganglia circuitry alterations. Both treatments decreased SNR firing rate compared to HP state. However, LD+CD treatments significantly increased SNR bursting firing patterns that were not seen with MPEP+CD treatments. No significant changes were seen in STN firing properties. We then evaluated the effects of a water extract of MPEP. Oral MPWE ameliorated parkinsonism without causing drug-induced dyskinesias. The distinctive neurophysiological findings in the basal ganglia and the ability to ameliorate parkinsonism without causing dyskinesias strongly suggest thatMucuna pruriensacts through a novel mechanism that is different from that of LD.


Neuroscience ◽  
1988 ◽  
Vol 24 (3) ◽  
pp. 803-811 ◽  
Author(s):  
D.J.S. Sirinathsinghji ◽  
S.B. Dunnett ◽  
O. Isacson ◽  
D.J. Clarke ◽  
K. Kendrick ◽  
...  

Author(s):  
G. C. Smith ◽  
R. L. Heberling ◽  
S. S. Kalter

A number of viral agents are recognized as and suspected of causing the clinical condition “gastroenteritis.” In our attempts to establish an animal model for studies of this entity, we have been examining the nonhuman primate to ascertain what viruses may be found in the intestinal tract of “normal” animals as well as animals with diarrhea. Several virus types including coronavirus, adenovirus, herpesvirus, and picornavirus (Table I) were detected in our colony; however, rotavirus, astrovirus, and calicivirus have not yet been observed. Fecal specimens were prepared for electron microscopy by procedures reported previously.


Author(s):  
Jorge Pecci Saavedra ◽  
Mark Connaughton ◽  
Juan José López ◽  
Alicia Brusco

The use of antibodies as labels for the localization of specific molecules in the nervous systan has been extensively applied in recent years. Both monoand polyclonal antibodies or antisera have been employed. The knowledge of the organization of neuronal connectivities, gliovascular relationships, glioneuronal relationships and other features of nerve tissue has greatly increased.A number of areas of the nervous systan have been analyzed in our laboratory, including the nuclei of the raphe system, the reticular formation, interpeduncular nucleus, substantia nigra, caudate nucleus, putamen, pallidum, spinal cord, pineal gland and others.From a technical point of view, a number of variables needed to be taken into account in order to obtain reliable and reproducible results. The design of the optimal conditions of tissue fixation, embedding, sectioning, dilution of antibodies, and adaptation of Sternberger PAP technique were sane of the parameters taken into account to optimize the results. It is critical that each step of the technique be defined for each particular case.


1996 ◽  
Vol 22 (3) ◽  
pp. 228-232 ◽  
Author(s):  
D. A. McRitchie ◽  
G. M. Halliday ◽  
R. Pamphlett

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