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Molecular origin(s) of the diverse behavioral responses to anticholinesterases were explored in behaviorally impaired transgenic (Tg) FVB/N mice expressing synaptic human acetylcholinesterase (hAChE-S). Untreated hAChE-S Tg, unlike naïve FVB/N mice, presented variably intense neuronal overexpression of the alternatively spliced, stress-induced mouse(More)
Coherent Diffractive Imaging (CDI) is an algorithmic imaging technique where intricate features are reconstructed from measurements of the freely diffracting intensity pattern. An important goal of such lensless imaging methods is to study the structure of molecules that cannot be crystallized. Ideally, one would want to perform CDI at the highest(More)
Endotoxin stimulation of the immune system produces marked alterations in memory functioning. However, molecular links between this cognitive response and infection-responding neurotransmission pathways are still unknown. The cytokine and memory responses of volunteers injected with 0.8 ng/kg Salmonella endotoxin were compared with changes in plasma levels(More)
Human brain ageing is associated with reductions in a variety of nicotinic receptors subtypes, whereas changes in age-related disorders including Alzheimer's disease or Parkinson's disease are more selective. In Alzheimer's disease, in the cortex there is a selective loss of the alpha4 (but not alpha3 or 7) subunit immunoreactivity and of nicotine or(More)
We examined whether DA neurotoxicity of 1-methyl-4-phenyl-1,2,5,6-tetrahydropyridine (MPTP) can be prevented by combined systemic administration of antioxidants. C57 black mice were injected s.c. with MPTP (30 mg/kg), once daily for two days, alone, or with ascorbic acid (1 g/kg), alpha-tocopherol (100 mg/kg), or dimethylsulfoxide (50 microliters) i.p. for(More)
To examine effects of various pharmacological manipulations of dopamine (DA) metabolism on DA neurotoxicity of N-methyl-4-phenyl-1,2,5,6-tetrahydropyridine (MPTP), C57 black mice were injected with MPTP (30 mg/kg s.c., once daily for two days) alone or in combination with apomorphine, bromocriptine, haloperidol, L-DOPA or nomifensine. MPTP markedly(More)
Combined administration of nomifensine, a DA reuptake inhibitor, and MPTP completely prevented the long-term (30 days post-treatment) striatal DA depletions induced by MPTP in mice. Cotreatment with desipramine and clomipramine or fluoxetine, inhibitors of NE and 5-HT, respectively had no effect on DA neurotoxicity of MPTP. The findings indicate that MPTP(More)
We predict the existence of random phase solitons in nonlinear periodic lattices. These solitons exist when the nonlinear response time is much longer than the characteristic time of random phase fluctuations. The intensity profiles, power spectra, and statistical (coherence) properties of these stationary waves conform to the periodicity of the lattice.(More)
Neuronal nicotinic receptor binding sites as well as mRNA levels encoding for subunits alpha4, beta2, and alpha7 were analysed in 3-mo-old transgenic mice generated with a neuronal overexpression of human acetylcholinesterase and in age-matched controls. The acetylcholinesterase transgenic mice display progressive cognitive impairment in spatial learning(More)
In C57 black mice, MPTP (N-methyl-4-phenyl-1,2,3,6-tetrahydropyridine) (30 mg/kg X 2, 20 mg/kg X 15, 30 mg/kg X 15, or 35 mg/kg X 1) depleted DA in both striatum and accumbens but not in frontal cortex, hypothalamus and retina. DA decreases were more pronounced in striatum than in accumbens, were maximal at 2 days, partially reversed later but persisted up(More)