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催产素可防止皮质酮诱导的 DA 功能障碍:涉及蛋白激酶 A/CREB 通路。

Oxytocin Protects Against Corticosterone-Induced DA Dysfunction: An Involvement of the PKA/CREB Pathway.

机构信息

Research Center for Neuroscience, Institute of Molecular Biosciences, Mahidol University, Nakhon Pathom, 73170, Thailand.

Faculty of Physical Therapy, Mahidol University, Nakhon Pathom, 73170, Thailand.

出版信息

Neurochem Res. 2024 Nov 28;50(1):38. doi: 10.1007/s11064-024-04294-7.

Abstract

Chronic stress disrupts dopamine (DA) transmission, adversely affecting mood and contribution to neuropsychiatric disorders like ADHD, autism, schizophrenia, anxiety, depression, and drug addiction. The neuropeptide oxytocin (OXT) plays a key role in social cognition, bonding, attachment, and parenting behaviors. In addition, OXT can modulate the activity of the HPA axis, counteracting the effects of stress, and alleviating fear and anxiety. However, whether OXT can mitigate stress-induced DA dysfunction and the underlying mechanisms remains unclear. This study investigated the neuroprotective effects of OXT on corticosterone (CORT) induced DA dysfunction in the neuroblastoma cell line SH-SY5Y. The results revealed that CORT decreases the levels of intracellular signaling molecules associated with DA function, including phosphorylated tyrosine hydroxylase (pTH), phosphorylated cAMP response element-binding protein (pCREB), and protein kinase A (PKA). Interestingly, pretreatment with OXT mitigated CORT-induced DA dysfunction through its potent PKA activator properties. In addition, the neuroprotective effect of OXT was abolished by atosiban (an OXT receptor antagonist) or H89 (a PKA inhibitor). Our results suggest that OXT protects dopaminergic neuroblastoma cells from CORT-induced DA dysfunction, potentially through the involvement of oxytocin receptors and the PKA/CREB signaling pathway. These findings contribute to the understanding of the neurobiological mechanisms underlying stress resilience and highlight potential pathways for developing targeted treatments that leverage the neuroprotective properties of OXT to address disorders characterized by DA dysregulation and impaired stress responses.

摘要

慢性应激会破坏多巴胺(DA)的传递,从而对注意力缺陷多动障碍(ADHD)、自闭症、精神分裂症、焦虑症、抑郁症和药物成瘾等神经精神疾病的情绪和发病产生不利影响。神经肽催产素(OXT)在社会认知、结合、依恋和养育行为中起着关键作用。此外,OXT 可以调节 HPA 轴的活性,抵消应激的影响,减轻恐惧和焦虑。然而,OXT 是否可以减轻应激引起的 DA 功能障碍以及潜在的机制尚不清楚。本研究探讨了 OXT 对皮质酮(CORT)诱导的神经母细胞瘤细胞系 SH-SY5Y 中 DA 功能障碍的神经保护作用。结果表明,CORT 降低了与 DA 功能相关的细胞内信号分子的水平,包括磷酸化酪氨酸羟化酶(pTH)、磷酸化 cAMP 反应元件结合蛋白(pCREB)和蛋白激酶 A(PKA)。有趣的是,OXT 的预处理通过其强效的 PKA 激活特性减轻了 CORT 诱导的 DA 功能障碍。此外,阿托西班(一种 OXT 受体拮抗剂)或 H89(一种 PKA 抑制剂)可消除 OXT 的神经保护作用。我们的研究结果表明,OXT 可保护多巴胺能神经母细胞瘤细胞免受 CORT 诱导的 DA 功能障碍,可能通过涉及催产素受体和 PKA/CREB 信号通路。这些发现有助于理解应激适应的神经生物学机制,并强调了开发靶向治疗的潜在途径,利用 OXT 的神经保护特性来解决以 DA 失调和应激反应受损为特征的疾病。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/99d2/11604774/a52230264dbb/11064_2024_4294_Fig1_HTML.jpg

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