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  2. Serotonin–norepinephrine reuptake inhibitor - Wikipedia

    en.wikipedia.org/wiki/Serotonin–norepinephrine...

    [10] [25] Medications for depression affect the transmission of serotonin, norepinephrine, and dopamine. [10] Older and less selective antidepressants like TCAs and MAOIs inhibit the reuptake or metabolism of norepinephrine and serotonin in the brain, which results in higher concentrations of neurotransmitters. [25]

  3. Acute tryptophan depletion - Wikipedia

    en.wikipedia.org/wiki/Acute_tryptophan_depletion

    For example, a meta-analysis show that the effect size for the effects of tryptophan depletion on mood in depressed people not taking antidepressants was large (Hedge's g = −1.9 (95% CIs −3.02 to −0.78) [3] Hence, a more accurate interpretation is that tryptophan depletion studies suggest a role for 5-HT in people vulnerable to depression ...

  4. Eosinophilia–myalgia syndrome - Wikipedia

    en.wikipedia.org/wiki/Eosinophilia–myalgia...

    Eosinophilia–myalgia syndrome is a rare, sometimes fatal neurological condition linked to the ingestion of the dietary supplement L-tryptophan. [1] [2] The risk of developing EMS increases with larger doses of tryptophan and increasing age. [3]

  5. α-Methyltryptophan - Wikipedia

    en.wikipedia.org/wiki/Α-Methyltryptophan

    [3] [4] [5] The preceding limitations of tryptophan make its use in PET imaging in humans impossible, whereas αMTP is a viable agent for such purposes. [ 5 ] αMTP is first converted by tryptophan hydroxylase into α-methyl-5-hydroxytryptophan (αM-5-HTP or α-methyl-5-HTP), the α-methylated analogue of 5-hydroxytryptophan (5-HTP), prior to ...

  6. Kynurenine pathway - Wikipedia

    en.wikipedia.org/wiki/Kynurenine_pathway

    Disorders affecting the kynurenine pathway may be primary (of genetic origin) or secondary (due to inflammatory conditions). [9] Peripheral inflammation can lead to a build up of kynurenine in the brain, and this is associated with major depressive disorder, [5] [6] bipolar disorder, [1] [5] [2] [8] and schizophrenia.

  7. Kynurenic acid - Wikipedia

    en.wikipedia.org/wiki/Kynurenic_acid

    Kynurenic acid (KYNA or KYN) is a product of the normal metabolism of amino acid L-tryptophan. It has been shown that kynurenic acid possesses neuroactive activity. It acts as an antiexcitotoxic and anticonvulsant, most likely through acting as an antagonist at excitatory amino acid receptors. Because of this activity, it may influence ...

  8. 5-Hydroxytryptophan - Wikipedia

    en.wikipedia.org/wiki/5-Hydroxytryptophan

    5-HTP is produced from the amino acid tryptophan through the action of the enzyme tryptophan hydroxylase. Tryptophan hydroxylase is one of the biopterin-dependent aromatic amino acid hydroxylases. Production of 5-HTP is the rate-limiting step in 5-HT (serotonin) synthesis. 5-HTP is normally rapidly converted to 5-HT by amino acid decarboxylase. [1]

  9. Emotional dysregulation - Wikipedia

    en.wikipedia.org/wiki/Emotional_dysregulation

    Part of emotional dysregulation, which is a core characteristic in borderline personality disorder, is affective instability, which manifests as rapid and frequent shifts in mood of high affect intensity and rapid onset of emotions, often triggered by environmental stimuli. The return to a stable emotional state is notably delayed, exacerbating ...

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