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1 radation toward the production of neurotoxic quinolinic acid.
2 tivity promotes the production of neurotoxic quinolinic acid.
3 otic destruction produced in rat striatum by quinolinic acid.
4  destined to die following administration of quinolinic acid.
5  administration of the NMDA receptor agonist quinolinic acid.
6 n, probably as a consequence of formation of quinolinic acid.
7 way that ultimately degrades kynurenine into quinolinic acid.
8 DO and generates the neuroactive metabolite, quinolinic acid.
9 hanced ability to modify the accumulation of quinolinic acid.
10 eiving striatal injections of the neurotoxin quinolinic acid.
11 tive cells in cultures after incubation with quinolinic acid.
12 ytes, occurred during longer incubation with quinolinic acid.
13  by TNFalpha, gp120, and necrosis induced by quinolinic acid.
14 location were measured after the infusion of quinolinic acid (120 nmol) into rat striatum.
15 te and dihydroxyacetone phosphate, affording quinolinic acid, a central intermediate in the biosynthe
16 ing inorganic phosphate, 2 mol of water, and quinolinic acid, a central intermediate in the biosynthe
17                                              Quinolinic acid, a macrophage/microglia-derived excitoto
18 r an intrastriatal injection of low doses of quinolinic acid, a N-methyl-D-aspartate receptor agonist
19       This study investigated the sources of quinolinic acid, a neurotoxic tryptophan-kynurenine path
20  brain macrophages and microglia can release quinolinic acid, a neurotoxin and NMDA (N-methyl-D-aspar
21                           Here, we show that quinolinic acid accumulated in human gliomas and was ass
22 ults are consistent with the hypothesis that quinolinic acid accumulation in brain tissue contributes
23  used to examine the mechanisms of increased quinolinic acid accumulations and determine the relation
24                                        Since quinolinic acid acts as a potent excitotoxin, the early
25                                           As quinolinic acid acts as an N-methyl-D-aspartate (NMDA) r
26  AP-1, whose binding peaked about 6 hr after quinolinic acid administration, and E2F-1, which was onl
27  death induced by intrastriatal injection of quinolinic acid, an N-methyl-D-aspartate glutamate recep
28 on resulting from intrastriatal injection of quinolinic acid, an NMDA receptor agonist, and kainic ac
29                                Although both quinolinic acid and 3-nitropropionic acid destroy medium
30 h are activated by the tryptophan metabolite quinolinic acid and blocked by kynurenic acid.
31           Our study results revealed highest quinolinic acid and highest BTP- levels in the subsample
32 d to neurotoxicity through the generation of quinolinic acid and immunosuppression and can alter brai
33 OD-1 activity significantly protects against quinolinic acid and kainic acid neurotoxicity in the mou
34 m is activated, leading to the production of quinolinic acid and kynurenic acid which can modulate N-
35 with neurotoxicity through the generation of quinolinic acid and other toxins.
36 ) to Cu(I) and Fe(II), respectively, whereas quinolinic acid and the nonphenolic kynurenine catabolit
37 f tryptophan metabolism includes an agonist (quinolinic acid) and an antagonist (kynurenic acid) at t
38 of neurotoxins (tumor necrosis factor-alpha, quinolinic acid, and nitric oxide) in plasma and CSF wer
39                                        Thus, quinolinic acid arising from macrophages and microglia d
40 ) metabolism by exploiting microglia-derived quinolinic acid as an alternative source of replenishing
41    Small excitotoxin lesions were made using quinolinic acid at bilateral sites within the dorsolater
42 brains of 2-day-old rats were incubated with quinolinic acid at concentrations known to kill neurons.
43 replication is a significant driver of local quinolinic acid biosynthesis.
44                                Increased CSF quinolinic acid concentration on admission in children w
45                                          CSF quinolinic acid concentration progressively increased af
46                                              Quinolinic acid concentration was measured by gas chroma
47                                          CSF quinolinic acid concentration was not associated with ag
48                         Although overall CSF quinolinic acid concentration was not associated with sh
49                                Increased CSF quinolinic acid concentrations also correlated with high
50  infant syndrome had increased admission CSF quinolinic acid concentrations compared with children wi
51  of 94 HIV-1-infected patients, elevated CSF quinolinic acid concentrations correlated with worsening
52                                    In brain, quinolinic acid concentrations in HIV-infected patients
53 bsamples with lower or no immune activation (quinolinic acid: F = 21.027, p < 0.001 [ANOVA]; BTP: F =
54 etabolites in both pathways are converted to quinolinic acid for NAD biosynthesis or to acetyl-CoA fo
55 acid phosphoribosyltransferase (QPRT) to use quinolinic acid for NAD(+) synthesis and prevent apoptos
56 hat significant predictors of BTP levels are quinolinic acid, glomerular filtration rate and age.
57 que with encephalitis showed that almost all quinolinic acid (&gt;98%) was synthesized locally within th
58                   Pathologic accumulation of quinolinic acid has been found in neurodegenerative diso
59  necrosis factor-alpha (TNFalpha), gp120 and quinolinic acid have been implicated as agents for the c
60             Direct measures of the amount of quinolinic acid in brain derived from blood in a macaque
61 in the interferon-gamma-induced synthesis of quinolinic acid in primary cultures of cultured human pe
62  kynurenine pathway, based on high levels of quinolinic acid, in patients with IBD compared with cont
63 vels of tryptophan metabolites-especially of quinolinic acid-indicated a high activity of tryptophan
64  be a new non-invasive biomarker to indicate quinolinic acid-induced impaired blood-brain barrier int
65 te whether BTP might non-invasively indicate quinolinic acid-induced impaired blood-brain barrier int
66                                    Moreover, quinolinic acid-induced internucleosomal DNA fragmentati
67 pared with sham-operated controls, rats with quinolinic acid-induced medial striatal lesions showed a
68         Excitotoxic cell death stimulated by quinolinic acid injection into the striatum has a long h
69  areas of encephalitis, rather than entry of quinolinic acid into the brain from the meninges or bloo
70 r, monkeys received unilateral injections of quinolinic acid into the previously implanted striatum t
71                                              Quinolinic acid is a product of tryptophan degradation a
72 catabolize tryptophan, it is unclear whether quinolinic acid is produced in gliomas and whether it is
73 ncrease in the macrophage-derived neurotoxin quinolinic acid is seen following severe TBI in children
74                              To test whether quinolinic acid is toxic to oligodendrocytes, glial cell
75                                 In contrast, quinolinic acid lead to a reduction in OCT-1, beginning
76 n of IDO1 pathway metabolites kynurenine and quinolinic acid led to activation of beta-catenin and pr
77                                     Finally, quinolinic acid lesion of striatal projection neurons de
78 ed CPP, rats received bilateral infusions of quinolinic acid (lesion group) or vehicle (sham group) i
79                                              Quinolinic acid lesions decreased the number of NeuN-pos
80    The present study examined the effects of quinolinic acid lesions of the dorsal anterior cingulate
81                                          BLA quinolinic acid lesions significantly disrupted PPI 1 we
82                                          CSF quinolinic acid levels were also elevated in all infecte
83 nificant correlations between elevated serum quinolinic acid levels with those in CSF and brain paren
84                               The neurotoxin quinolinic acid may impair blood-brain barrier integrity
85    These findings raise the possibility that quinolinic acid may play a role in secondary injury afte
86 table isotope-labeled precursors tryptophan, quinolinic acid, nicotinic acid, and nicotinamide were a
87 tory behavior were recorded before and after quinolinic acid or radiofrequency (RF) lesions were made
88                                              Quinolinic acid phosphoribosyl transferase (QAPRTase, EC
89                                              Quinolinic acid phosphoribosyltransferase (QAPRTase, EC
90  but not nonneoplastic astrocytes, expressed quinolinic acid phosphoribosyltransferase (QPRT) to use
91                           Because a required quinolinic acid phosphoribosyltransferase (QPRTase) is n
92 tic mechanism in which productive binding of quinolinic acid precedes that of PRPP.
93 ed by microglial cells, as expression of the quinolinic acid-producing enzyme 3-hydroxyanthranilate o
94                           Moreover, rates of quinolinic acid production were reported to be 2.2 micro
95 ical attention or age-related differences in quinolinic acid production.
96  forms nicotinate mononucleotide (NAMN) from quinolinic acid (QA) and 5-phosphoribosyl 1-pyrophosphat
97 tide, carbon dioxide, and pyrophosphate from quinolinic acid (QA) and 5-phosphoribosyl 1-pyrophosphat
98 o, rats were given the NMDA receptor agonist quinolinic acid (QA) by intrastriatal infusion, and the
99 sic striatal neurons by a local injection of quinolinic acid (QA) dramatically enhances the magnitude
100 tum with either 6-hydroxydopamine (6OHDA) or quinolinic acid (QA) exaggerated their dystonic attacks.
101                                              Quinolinic acid (QA) is a common intermediate in the bio
102                                              Quinolinic acid (QA) is a metabolite of tryptophan degra
103 cal lesions, by using either the excitotoxin quinolinic acid (QA) or the complex II mitochondria inhi
104 mon architecture for both nicotinic acid and quinolinic acid (QA) phosphoribosyltransferases (PRTase)
105 genes of the kynurenine pathway required for quinolinic acid (QA) production from tryptophan are pres
106 eptor agonist N-methyl-D-aspartate (NMDA) or quinolinic acid (QA) were studied.
107 selective detection of endogenous neurotoxin quinolinic acid (QA) whose elevated level in serum is ma
108 nd neurotoxic (3-hydroxykynurenine (3HK) and quinolinic acid (QA)) kynurenine pathway metabolites wer
109                                    Levels of quinolinic acid (QA), a potent NMDA agonist, are elevate
110             Three metabolites were measured: quinolinic acid (QA), an excitotoxin; kynurenic acid (KA
111 inic acid (NAc) and its metabolic precursor, quinolinic acid (QA), are produced in yields as high as
112   The enzyme NadA catalyzes the synthesis of quinolinic acid (QA), the precursor of the universal nic
113 ydrating enzyme involved in the synthesis of quinolinic acid (QA), the universal precursor of the ess
114 s, kynurenine (KYN), kynurenic acid (KA) and quinolinic acid (QA), were examined in terms of their ef
115 n stem cell transplants into the striatum of quinolinic acid (QA)-lesioned rats.
116  days later by an intrastriatal injection of quinolinic acid (QA).
117 astriatal administration of the NMDA agonist quinolinic acid (QA).
118 drial complex II activity or the excitotoxin quinolinic acid (QA).
119 e metabolites were measured: the excitotoxin quinolinic acid (QA); the protective receptor antagonist
120 eived unilateral injection (1 microliter) of quinolinic acid (QA, 40 micrograms in 0.1 M phosphate bu
121 events triggered by intrastriatally injected quinolinic acid (QA, 60 nmol) and kainic acid (KA, 2.5 n
122  5-phosphoribosyl 1-pyrophosphate (PRPP) and quinolinic acid (QA, pyridine 2,3-dicarboxylic acid).
123 me animals received unilateral injections of quinolinic acid (QA; 225 nmol) into the ipsilateral stri
124 thletes had significantly elevated levels of quinolinic acid (QUIN) and significantly lower ratios of
125                                   The use of quinolinic acid (Quin) as an Fe(II) ligand was proposed
126 increase the release of the NMDA excitotoxin quinolinic acid (QUIN) from mononuclear cells.
127  kynurenine, 3-hydroxykynurenine (3-HK), and quinolinic acid (QUIN) in rat brain.
128                                              Quinolinic acid (QUIN) is a product of tryptophan metabo
129 d chronic intrastriatal dialytic exposure to quinolinic acid (QUIN), malonate, or a combination of QU
130            Rat striata were exposed to 15 mM quinolinic acid (QUIN), or QUIN plus the nitric oxide sy
131 ted by the neurotoxin and related metabolite quinolinic acid (QUIN), the mitochondrial toxin 3-nitrop
132 ctive metabolites, including the neurotoxin, quinolinic acid (QUIN), the neuroprotective agent, picol
133 tion of the neurotoxic tryptophan metabolite quinolinic acid (QUIN).
134 ween neurotoxic [3-hydroxykynurenine (3-HK); quinolinic acid (QUIN)] and neuroprotective [kynurenic a
135 al loss caused by intrastriatal injection of quinolinic acid resulted in a comparable increase.
136 mage in the mouse brain by (i) administering quinolinic acid to conditional mutant animals lacking CB
137                                 We have used quinolinic acid to create unilateral excitotoxic lesions
138 mulations and determine the relationships of quinolinic acid to encephalitits and systemic responses.
139                                 Furthermore, quinolinic acid was elevated in neonatally infected rat
140                                              Quinolinic acid was produced by microglial cells, as exp
141 als, the levels of the downstream metabolite quinolinic acid were also greatly decreased in liver and
142 these specimens, whereas chitotriosidase and quinolinic acid were elevated in 2 patients.
143 bolites kynurenine, 3-hydroxykynurenine, and quinolinic acid were unchanged in the brain and liver of
144 icity of these associations, blood levels of quinolinic acid were unrelated to striatal and limbic vo
145 3-HK, 3-hydroxyanthranilic acid (3-HAA), and quinolinic acid, which are considered neurotoxic owing t
146                                              Quinolinic acid, which is produced by macrophages and mi
147 enase in accelerating the local formation of quinolinic acid within the brain tissue, particularly in

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