Methods Motor-evoked potentials following

transcranial m

Methods. Motor-evoked potentials following

transcranial magnetic stimulation, and compound muscle action potentials and F-waves following electrical stimulation in the ulnar and tibial nerves were measured from the abductor digiti minimi (ADM) and abductor hallucis (AH) muscles in 20 patients with CTM, 92 patients with compressive cervical myelopathy (CCM), and 18 control subjects. The CMCT detected from the ADM (CMCT-ADM), the AH (CMCT-AH), and the CMCT-ADM/AH ratio (CMCT-ADM/CMCT-AH) were calculated.

Results. The CMCT-AHs in patients with CTM were significantly longer than in control subjects, although there were no significant differences in the CMCT-ADMs. In contrast, both the CMCT-ADMs and CMCT-AHs in the CCM group were significantly longer than those of the control group. The CMCT-ADM/AH ratios in the CTM group were significantly lower than those of the other groups. Among the CTM and LB-100 CCM groups, when the cutoff point of the CMCT-ADM/AH ratio was set at equal to or lower than 0.52, i.e., the mean CMCT-ADM/AH ratio in the control group, the odds ratio for CTM was 68.4 (95% confidence I-BET-762 chemical structure interval: 8.62-543; P < 0.001).

Conclusion. Our data showed a significant pattern of CMCT parameters and low CMCT-ADM/AH ratios in patients

with CTM. The measurement of CMCT is valuable as a noninvasive technique for screening patients with CTM or CCM before magnetic resonance imaging.”

conditions such as Alzheimer’s disease, Parkinson’s disease, and hemorrhagic stroke are associated with increased levels of non-transferrin-bound iron (NTBI) in the brain, which can promote Fenton chemistry. While all types of brain cells can take up NTBI, their efficiency of accumulation and capacity to withstand iron-mediated toxicity has not been directly compared. The present study assessed NTBI accumulation in cultures enriched in neurons, astrocytes, or microglia after exposure to ferric ammonium citrate (FAC). Microglia were found to be the most efficient in accumulating iron, followed by astrocytes, and then neurons. Exposure to 100 mu M FAC for 24 h increased the specific iron content of cultured neurons, astrocytes, and microglial cells by 30-, 80-, and 100-fold, respectively. All cell types accumulated iron against the concentration gradient, resulting in intracellular iron concentrations that were several orders of magnitude higher than the extracellular iron concentrations. Accumulation of these large amounts of iron did not affect the viability of the cell cultures, indicating a high resistance to iron-mediated toxicity. These findings show that neurons, astrocytes and microglia cultured from neonatal mice all have the capacity to accumulate and safely store large quantities of iron, but that glial cells do this more efficiently than neurons.

Leave a Reply

Your email address will not be published. Required fields are marked *


You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>