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821596 occurrences (No.5 in the rank) during 5 years in the PubMed. [no cache] 500 found

364) Although several lines of evidence have shown that chronic cocaine use is associated with stress system dysregulation, the underlying neurochemical mechanisms are still elusive.

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PMID:24102978 DOI:10.1111/adb.12089

2015 Addiction biology

* Stress rapidly dysregulates the glutamatergic synapse in the prefrontal cortex of cocaine-withdrawn adolescent rats.

- Although several lines of evidence have shown that chronic cocaine use is associated with stress system dysregulation, the underlying neurochemical mechanisms are still elusive. To investigate whether the rapid stress-induced response of the glutamatergic synapse was influenced by a previous history of cocaine, rats were exposed to repeated cocaine injections during adolescence [from postnatal day (PND) 28-42], subjected to a single swim stress (5 minutes) three days later (PND 45) and sacrificed 15 minutes after the end of this stressor. Critical determinants of glutamatergic homeostasis were measured in the medial prefrontal cortex (mPFC) whereas circulating corticosterone levels were measured in the plasma. Exposure to stress in saline-treated animals did not show changes in the crucial determinants of the glutamatergic synapse. Conversely, in cocaine-treated animals, stress dynamically altered the glutamatergic synapse by: (1) enhancing the presynaptic vesicular mediators of glutamate release; (2) reducing the transporters responsible for glutamate clearance; (3) increasing the postsynaptic responsiveness of the N-methyl-D-aspartate subunit GluN1; and (4) causing hyperresponsive spines as evidenced by increased activation of the postsynaptic cdc42-Pak pathway. These findings indicate that exposure to cocaine during adolescence sensitizes mPFC glutamatergic synapses to stress. It is suggested that changes in glutamatergic signaling may contribute to the increased sensitivity to stress observed in cocaine users. Moreover, glutamatergic processes may play an important role in stress-induced reinstatement of cocaine seeking.

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(3)24 null	(10)5 with	(17)3 these	(24)2 therapeutic
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--- WordNet output for use --- =>利用, 使う, 利用する, (体, 能力など)を働かす, 使用, 利用法 Overview of noun use The noun use has 7 senses (first 6 from tagged texts) 1. (90) use, usage, utilization, utilisation, employment, exercise -- (the act of using; "he warned against the use of narcotic drugs"; "skilled in the utilization of computers") 2. (18) function, purpose, role, use -- (what something is used for; "the function of an auger is to bore holes"; "ballet is beautiful but what use is it?") 3. (7) use -- (a particular service; "he put his knowledge to good use"; "patrons have their uses") 4. (1) consumption, economic consumption, usance, use, use of goods and services -- ((economics) the utilization of economic goods to satisfy needs or in manufacturing; "the consumption of energy has increased steadily") 5. (1) habit, use -- ((psychology) an automatic pattern of behavior in reaction to a specific situation; may be inherited or acquired through frequent repetition; "owls have nocturnal habits"; "she had a habit twirling the ends of her hair"; "long use had hardened him to it") 6. (1) manipulation, use -- (exerting shrewd or devious influence especially for one's own advantage; "his manipulation of his friends was scandalous") 7. use, enjoyment -- ((law) the exercise of the legal right to enjoy the benefits of owning property; "we were given the use of his boat") Overview of verb use The verb use has 6 senses (first 3 from tagged texts) 1. (603) use, utilize, utilise, apply, employ -- (put into service; make work or employ for a particular purpose or for its inherent or natural purpose; "use your head!"; "we only use Spanish at home"; "I can't use this tool"; "Apply a magnetic field here"; "This thinking was applied to many projects"; "How do you utilize this tool?"; "I apply this rule to get good results"; "use the plastic bags to store the food"; "He doesn't know how to use a computer") 2. (12) use, habituate -- (take or consume (regularly or habitually); "She uses drugs rarely") 3. (8) use, expend -- (use up, consume fully; "The legislature expended its time on school questions") 4. use -- (seek or achieve an end by using to one's advantage; "She uses her influential friends to get jobs"; "The president's wife used her good connections") 5. practice, apply, use -- (avail oneself to; "apply a principle"; "practice a religion"; "use care when going down the stairs"; "use your common sense"; "practice non-violent resistance") 6. use -- (habitually do something (use only in the past tense); "She used to call her mother every week but now she calls only occasionally"; "I used to get sick when I ate in that dining hall"; "They used to vacation in the Bahamas") --- WordNet end ---