نبذة مختصرة : Background: The development of postpartum depression has been linked to fluctuations in the levels of neurotransmitters in the human body, such as 5-hydroxytryptamine (5-HT), dopamine (DA), noradrenaline (Norepinephrine, NE), and brain derived neurotrophic factor (BDNF). Research has indicated that the antidepressant effect of esketamine are mediated by monoamine transmitters and neurotrophic factors. Therefore, we postulate that intravenous administration of esketamine in patients with postpartum depression may alter the serum concentrations of these neurotransmitters. Methods: Three hundred fifteen patients with postpartum depression were selected and divided into two groups based on randomized numerical expression: esketamine (E) group (0. 25 mg/kg esketamine) and control (C) group (a same volume of 0.9% saline), all the drugs were pumped for 40 min. After the end of drug pumping, all patients were continuously observed for 2 h. Changes in serum levels of 5-HT, DA, NE, BDNF were recorded before drug administration and on the 3rd day after drug administration. The scores of Edinburgh Postnatal Depression Scale (EPDS) were calculated before drug administration, and on the 3rd day and on the 30th day after drug administration. Dizziness, headache, nausea, vomiting, drowsiness, and feeling of detachment occurred were recorded within 2 h after drug administration. Results: Before drug administration, the serum concentrations of 5-HT,DA,BDNF,NE in Group E and Group C were namely (0. 91 ± 0. 19 vs. 0. 98 ± 0. 21, P = 0. 181), (2. 38 ± 0. 35 vs. 2. 32 ± 0. 32, P = 0. 491), (3. 07 ± 0. 89 vs 3. 02 ± 0. 88, P = 0. 828), (39. 79 ± 7. 78 vs 41. 34 ± 10. 03, P = 0. 506). On the third day post-medication, the serum concentrations of 5-HT,DA,BDNF,NE in Group E and Group C were namely (1. 42 ± 0. 35 vs. 0. 96 ± 0. 24, P < 0. 001), (3. 99 ± 0. 17 vs. 2. 41 ± 0. 28, P < 0. 001),(5. 45 ± 0. 81 vs 3. 22 ± 0. 76, P < 0. 001),(44. 36 ± 9. 98 vs 40. 69 ± 11. 75, P = 0. 198). Before medication, the EPDS scores were (16. 15 ± 3. 02 vs 17. 85 ± 3. 89, P = 0. 064). on the third day after medication, the Group E had significantly reduced scores (12. 98 ± 2. 39 vs 16. 73 ± 3. 52, P < 0. 001). On the 30rd day after medication, EPDS scores between the two groups were (16. 34 ± 3. 43 vs 16. 91 ± 4. 02, p = 0. 203). Within 2 h of medication, the rate of adverse events was similar between the two groups. Conclusions: Small doses of esketamine can increase the serum concentration of 5-HT,DA,BDNF, and in the short term, decrease EPDS scores, and improve postpartum depressive symptoms. Trial registration: Retrospectively registered in the Chinese Clinical Trial Registry (ChiCTR2300078343, 2023/12/05). [ABSTRACT FROM AUTHOR]
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