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Single low doses of MPTP decrease tyrosine hydroxylase expression in the absence of overt neuron loss.

Parkinson's disease (PD) is the second most common age-related neurodegenerative disease. 1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) is a prototypical neurotoxicant used in mice to mimic primary features of PD pathology including striatal…

MPTP neurotoxicity is highly concordant between the sexes among BXD recombinant inbred mouse strains.

Continuing our previous work in which we showed wide-ranging strain differences in MPTP neurotoxicity in male mice among ten BXD recombinant inbred strains, we replicated our work in females from nine of the same strains. Mice received a single s.c.…

Dopamine transporter function differences between male and female CD-1 mice.

It has been reported that male mice are more susceptible to the neurotoxic effects of methamphetamine (MA) upon the nigrostriatal dopaminergic (NSDA) system. Since MA utilizes the dopamine transporter (DAT) to exert its effects, in the present study,…

Tags: *Sex Characteristics, 2005, 3, 4-Dihydroxyphenylacetic Acid/metabolism, Animals, Bhatt Sandeep D, Brain research, Corpus Striatum/physiology, Dluzen Dean E, Dopamine Plasma Membrane Transport Proteins, Dopamine/physiology, Female, Male, Membrane Glycoproteins/*physiology, Membrane Transport Proteins/*physiology, Mice, Nerve Tissue Proteins/*physiology

Behavioral effects of N-ethyl-3,4-methylenedioxyamphetamine (MDE; "EVE").

Eight male rats were trained to discriminate 2.0 mg/kg

Tags: 1987, 3, 4-methylenedioxyamphetamine, 4-Methylenedioxyamphetamine/analogs & derivatives/*pharmacology, Amphetamines/*pharmacology, Animals, Boja J W, Discrimination (Psychology), Dose-Response Relationship, Drug, Inbred Strains, Legislation, Male, N-Methyl-3, Pharmacology, biochemistry, and behavior, Rats, Schechter M D, Time Factors, United States

Possible serotonergic and dopaminergic mediation of the

Eight male rats previously trained to discriminate 2.0 mg/kg

POSSIBLE SEROTONERGIC AND DOPAMINERGIC MEDIATION OF THE N-ETHYL-3,4-METHYLENEDIOXYAMPHETAMINE DISCRIMINATIVE STIMULUS

Eight male rats previously trained to discriminate 2.0 mg/kg N-ethyl-3,4-methylenedioxyamphetamine (MDE) from its vehicle in a two-lever, food motivated task were utilized to characterize the stimulus properties of MDE. The 5-HT receptor agonists…

Signaling pathways mediating the neuroprotective effects of sex steroids and SERMs in Parkinson's disease

Studies with the 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) animal model of Parkinson's disease have shown the ability of 17 beta-estradiol to protect the nigrostriatal dopaminergic system. This paper reviews the signaling pathways mediating…

Sex differences in methamphetamine toxicity in mice: Effect on brain dopamine signaling pathways

Mate mice were reported to display greater methamphetamine-induced neurotoxicity than females. The present study evaluated the involvement of phosphatidylinositol-3 kinase (PI3K)/Akt and extracellular signal-regulated kinase (ERK1/2) pathways in this…

The antinociceptive effects of 3,4-methylenedioxymethamphetamine (MDMA) in the rat.

The antinociceptive effects of MDMA and morphine were examined in rats using the tail-flick and hot-plate analgesiometric tests. MDMA, in the dose range of 1.5-6.0 mg/kg IP, produced a dose-dependent elevation in hot-plate latency, but did not…

Rotenone produces opposite effects upon mouse striatal dopamine function as a result of environmental temperature.

Rotenone is a commonly used pesticide that can function as an environmental neurotoxin. Rotenone is a known mitochondrial complex I inhibitor which can lead to oxidative stress and results in dopaminergic cell death. Another environmental factor…

Tags: *temperature, 2006, 3, 4-Dihydroxyphenylacetic Acid/metabolism, Analysis of Variance, Animals, Brain Chemistry/drug effects/physiology/radiation effects, Corpus Striatum/*drug effects/metabolism, Crutchfield Karla C, Dluzen Dean E, Dopamine/*metabolism, Dose-Response Relationship, Drug, Insecticides/*pharmacology, Methamphetamine/pharmacology, Mice, Neurotoxicity research, Rotenone/*pharmacology

Estrogen reduces acute striatal dopamine responses in vivo to the neurotoxin MPP+ in female, but not male rats.

The effects of in vivo estrogen treatment upon MPP(+)-induced dopamine (DA) release were determined using in vivo microdialysis in female and male rats. Ovariectomized female rats were implanted or not with an estrogen pellet (0.1 mg, 17beta…

Estrogen decreases corpus striatal neurotoxicity in response to

Ovariectomized rats treated or not with an estradiol pellet were subjected to an unilateral intrastriatal infusion of 6-hydroxydopamine (6-OHDA). Various parameters of nigrostriatal dopaminergic function as derived from measurements of dopamine and…

Tags: 1997, 3, 4-Dihydroxyphenylacetic Acid/metabolism, Animal, Animals, Brain research, Corpus Striatum/*drug effects, Disease Models, Dluzen D, Dopamine/metabolism, Estradiol/*pharmacology, Female, Neurotoxins/*toxicity, Oxidopamine/*toxicity, Parkinson Disease/*physiopathology, Rats, Sprague-Dawley

1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) reduces norepinephrine concentrations in the olfactory bulbs of male mice.

Male retired breeder C57/Bl and CD-1 mice were treated with either MPTP or its vehicle. At 7-10 days post-treatment, catecholamine concentrations within the olfactory bulbs (OB) and hypothalamus were determined. Norepinephrine concentrations within…

Tags: *Sex Characteristics, 1-Methyl-4-phenyl-1, 1992, 2, 3, 6-tetrahydropyridine/*pharmacology, Animals, Brain research, Dluzen D E, Dopamine/metabolism, Drug Resistance/genetics, Inbred C57BL, Inbred Strains, Male, Mice, Norepinephrine/*metabolism, Olfactory Bulb/*metabolism, Osmolar Concentration

Effects of testosterone upon MPTP-induced neurotoxicity of the nigrostriatal dopaminergic system of C57/B1 mice.

We have recently reported that treatment of gonadectomized female and male C57/B1 mice with the gonadal steroid hormone, estrogen, reduced nigrostriatal dopaminergic neurotoxicity resulting from the Parkinson's-like inducing agent

Age-related changes in monoamines within the olfactory bulbs of the Fischer 344 male rat.

In this report the olfactory bulbs (OB) were removed from 5-6 month, 15-16 month and 25-26 month male Fischer 344 rats and assayed for concentrations of monoamines and their metabolites using HPLC-EC. Concentrations of norepinephrine were…

Tags: 1996, 3, 4-Dihydroxyphenylacetic Acid/metabolism, Aging/*metabolism, Animals, Biogenic Monoamines/*metabolism, Dluzen D E, Dopamine/metabolism, Inbred F344, Male, Mechanisms of ageing and development, Olfactory Bulb/*metabolism, Rats, Serotonin/metabolism

The effects of nicotine on dopamine and DOPAC output from rat striatal tissue.

The effects of varying doses of nicotine infusion upon spontaneous (basal) and subsequent potassium chloride-stimulated dopamine and 3,4-dihydroxyphenylacetic acid (DOPAC) output from superfused corpus striatal tissue fragments of male rats were…

Tags: 1998, 3, 4-Dihydroxyphenylacetic Acid/*metabolism, Amphetamine/pharmacology, Anderson L I, Animals, Central Nervous System Stimulants/pharmacology, Corpus Striatum/*drug effects/*metabolism, Dluzen D E, Dopamine/*metabolism, Dose-Response Relationship, Drug, European journal of pharmacology, Ganglionic Stimulants/administration & dosage/*pharmacology, Male, Nicotine/administration & dosage/*pharmacology, Potassium Chloride/pharmacology, Rats, Sprague-Dawley

The effects of intranasal infusion of

Male C57/B1 mice received bilateral intranasal infusions of saline, MPTP or an intraperitoneal injection of MPTP. Infusions were performed using a peristaltic pump at a setting of 100 microliters/min. The MPTP, diluted in saline at concentrations of…

1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) disrupts social memory/recognition processes in the male mouse.

Male mice treated with MPTP or vehicle were tested for their ability to demonstrate a memory-recognition response as evaluated in a habituation-dishabituation task. Treatment with MPTP severely disrupted the male's habituation-dishabituation response…

The effect of reserpine treatment in vivo upon L-dopa and amphetamine evoked dopamine and DOPAC efflux in vitro from the corpus striatum of male rats.

In the present experiment we tested the effects of L-DOPA and amphetamine upon dopamine and DOPAC efflux in vitro from superfused corpus striatal tissue fragments of male rats who had been pretreated with reserpine. Male rats were treated with…

Tags: 1994, 3, 4-Dihydroxyphenylacetic Acid/*metabolism, Amphetamine/*pharmacology, Animals, Cell Compartmentation, Corpus Striatum/*drug effects/metabolism, Dluzen D E, Dopamine/*metabolism, Drug Interactions, Journal of neural transmission. General section, Levodopa/*pharmacology, Liu B, Male, Rats, Research Design, Reserpine/*pharmacology, Secretory Rate/drug effects, Sprague-Dawley

Sex differences in dopamine- and vesicular monoamine-transporter functions.

Men and women differ with regard to their use of, and responses to, methamphetamine (MA). Analogous sex differences with regard to MA are observed in animal models. In this report, data from a series of experiments that focus upon dopamine…

The effect of long-term treatment with deprenyl on basal and L-dopa evoked dopamine release in vitro from the corpus striatum of aged rats.

In the present experiment, male rats (15-17 months) were injected with deprenyl (0.25 mg/kg) three times per week for six months. At 21-23 months of age the male rats were sacrificed, the corpus striatum removed and superfused in vitro. Basal and…

Tags: 1991, 3, 4-Dihydroxyphenylacetic Acid/*metabolism, Aging/metabolism, Amphetamine/pharmacology, Animals, Corpus Striatum/*drug effects/metabolism, Dluzen D E, Dopamine/*metabolism, In Vitro Techniques, Journal of neural transmission. General section, Levodopa/pharmacology, Male, McDermott J L, Rats, Selegiline/*pharmacology

Neuroprotective Role Of Estrogen Upon Methamphetamine And Related Neurotoxins Within The Nigrostriatal Dopaminergic System

Tags: 1-Methyl-4-phenyl-1, 1-methyl-4-phenylpyridinium ion, 2, 2000, 3, 6-tetrahydropyridine, c57/b1 mice, Dluzen D E, estradiol, lipid-peroxidation, McDermott J L, mptp-induced neurotoxicity, Neurobiological Mechanisms of Drugs of Abuse: Cocaine, Ibogaine, and Substituted Amphetamines, parkinsons-disease, release, sexual differences, striatum

Relationships among gender, age, time, and temperature in methamphetamine-induced striatal dopaminergic neurotoxicity.

A neurotoxic regimen of methamphetamine (MA-40 mg/kg ip) administered at 0 (control-MA vehicle), 0.5 and 72 h prior to determinations of striatal dopamine (DA) and DOPAC (3,4-dihydroxyphenylacetic acid)/DA ratios were compared among juvenile and…

Estrogen alters MPTP-induced neurotoxicity in female mice: effects on striatal dopamine concentrations and release.

The effects of estrogen on MPTP-induced neurotoxicity of the nigrostriatal dopaminergic system were examined in C57Bl and CD-1 mice. Ovariectomized mice with and without estrogen were treated with MPTP or its vehicle. The effects of these treatments…

Tags: *MPTP Poisoning, 1996, 3, 4-Dihydroxyphenylacetic Acid/metabolism, Animals, Corpus Striatum/*drug effects/*metabolism, Dluzen D E, Dopamine/*metabolism, Estradiol/*pharmacology, Female, Inbred C57BL, Inbred Strains, Journal of neurochemistry, Levodopa/pharmacology, Liu B, McDermott J L, Mice, Osmolar Concentration, Ovariectomy

Modulatory effects of testosterone on

In this experiment, we examined the modulatory effects of testosterone on the parkinsonism-inducing drug 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) in two strains of mice. Orchidectomized male CD-1 and C57/B1 mice were implanted with either…

Modulatory Effects Of Testosterone On 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine-induced Neurotoxicity

Striatal dopamine release in vitro from immature male rats shows enhanced responsiveness to pulsatile, but not continuous, infusions of L-dopa.

In the present experiment we compared the effects of continuous versus pulsed infusions of L-beta-3,4,dihydroxyphenylalanine (L-DOPA) upon dopamine and 3,4-dihydroxyphenylacetic acid (DOPAC) release in vitro from superfused corpus striatal tissue…

Tags: 1991, 3, 4-Dihydroxyphenylacetic Acid/metabolism, Aging/*metabolism, Animals, Brain research. Developmental brain research, Corpus Striatum/*metabolism, Dluzen D, Dopamine/*metabolism, Inbred Strains, Levodopa/*administration & dosage/pharmacology, Male, McDermott J, Pulsatile Flow, Rats

The aromatic amino acid decarboxylase inhibitor, NSD-1015, increases release of dopamine: response characteristics.

Addition of the aromatic amino acid decarboxylase inhibitor, NSD-1015 (10 microM), to Krebs'-Ringer phosphate (KRP) superfusion medium, significantly increased the release of dopamine in vitro from superfused corpus striatum tissue fragments of male…

Tags: *Aromatic Amino Acid Decarboxylase Inhibitors, 1992, 3, 4-Dihydroxyphenylacetic Acid/metabolism, Animals, Brain/*drug effects/metabolism, Dluzen D, Dopamine/*metabolism, Hydrazines/*pharmacology, Male, McDermott J, Neuropharmacology, Rats, Reddy A, Sprague-Dawley

The effect of freezing and extraction upon striatal dopaminergic function.

Determinations of striatal dopamine (DA) and 3,4-dihydroxyphenylacetic acid (DOPAC) concentrations were compared under conditions where tissue was either frozen followed by extraction (FE) or extracted followed by freezing (EF). In Experiment 1,…

Tags: *Freezing, 2011, 3, 4-Dihydroxyphenylacetic Acid/metabolism, Analysis of Variance, Animals, Chemical Fractionation/methods, Corpus Striatum/*metabolism, Cryopreservation/methods, Dluzen Dean E, Dopamine/*metabolism, Journal of neuroscience methods, Male, Mice, Time Factors

Age-related changes in nigrostriatal dopaminergic function in heterozygous mutant dopamine transporter knock-out mice.

In this report we compared three different parameters of nigrostriatal dopaminergic (NSDA) function - locomotor activity, striatal dopamine (DA) levels and 3,4-dihydroxyphenylacetic acid (DOPAC)/DA ratios between heterozygous mutant dopamine…

Acute effects of estrogen upon methamphetamine induced neurotoxicity of the nigrostriatal dopaminergic system.

Estrogen acts as a neuroprotectant of the nigrostriatal dopaminergic system when given chronically to female mice prior to Methamphetamine (MA) insult. In this report, we tested the acute effects of Estradiol Benzoate (EB-10 microg in Oil) in…

A system for measuring electrophysiological multiple unit activity and extracellular dopamine concentration at single electrodes.

A technique is described for measuring electrophysiological multiple-unit activity and extracellular dopamine concentration with in vivo voltammetry at an array of 8 electrodes. In addition, new procedures in the construction of the voltammetric…

In vivo neurochemical and anatomical heterogeneity of the dopamine uptake system in the rat caudate putamen.

The neurochemical and anatomical heterogeneity of dopamine uptake blockade was studied at a medial and lateral position in each of 3 rostrocaudal areas of the rat caudate-putamen. In vivo voltammetric measures of extracellular dopamine indicated a…

Tags: 1989, 3, 4-Dihydroxyphenylacetic Acid/metabolism, Animals, Brain research, Caudate Nucleus/drug effects/*metabolism, Dopamine/*metabolism, Electrochemistry, Glynn G E, Homovanillic Acid/metabolism, Inbred Strains, Indoles/*pharmacology, Male, Mazindol/*pharmacology, Neurotransmitter Uptake Inhibitors/*pharmacology, Nomifensine/*pharmacology, Putamen/drug effects/*metabolism, Rats, Yamamoto B K

L-dopa reverses castration-induced disruption of dishabituation responses to female chemical cues in male rats.

In the present experiment, habituation/dishabituation behavioral tests were conducted to measure discriminatory olfactory recognition responses to chemical cues among control, castrated, and castrated+L-3,4-dihydroxyphenylalanine (L-DOPA)-treated…

Sex differences in striatal dopaminergic function within heterozygous mutant dopamine transporter knock-out mice.

The issue of whether a deletion of the dopamine transporter (DAT) allele (+/- DAT) would differentially alter striatal dopamine (DA) and dihydroxyphenylacetic acid (DOPAC) concentrations and DA release upon potassium and methamphetamine (MA)…

Methamphetamine-induced Loss Of Striatal Dopamine Innervation In Bdnf Heterozygote Mice Does Not Further Reduce D-3 Receptor Concentrations

Depletion of dopamine (DA) reduces D, receptor number, but D-3 receptor expression is also regulated by brain-derived neurotrophic factor (BDNF). We took advantage of transgenic heterozygous BDNF mutant mice (+/-) to determine if reduced BDNF and…

Partial Deletion Of Ankrd11 Results In The Kbg Phenotype Distinct From The 16q24.3 Microdeletion Syndrome

KBG syndrome (OMIM 148050) is a very rare genetic disorder characterized by macrodontia, distinctive craniofacial abnormalities, short stature, intellectual disability, skeletal, and neurologic involvement. Approximately 60 patients have been…

Effect of estrogen upon methamphetamine-induced neurotoxicity within the impaired nigrostriatal dopaminergic system.

In the present study, we investigated whether estrogen remains effective as a neuroprotectant within an impaired nigrostriatal dopaminergic (NSDA) system of gonadectomized female and male mice. In Experiment 1, mice were treated with four different…

Effects of estrogen and related agents upon methamphetamine-induced neurotoxicity within an impaired nigrostriatal dopaminergic system of ovariectomized mice.

Estrogen increases methamphetamine (MA)-induced neurotoxicity within the impaired nigrostriatal dopaminergic (NSDA) system of ovariectomized female mice, as defined by enhanced striatal dopamine (DA) depletion. In this study we compared the effects…

Aging and sex differences in striatal dopaminergic function.

In this report the potassium- (30 mM) and amphetamine- (10 microM) stimulated responses of dopamine (DA) and 3,4-dihydroxy phenylacetic acid (DOPAC) from superfused striatal tissue of female and male mice as sampled at 2, 6, 18 and 24 months of age…

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