NeuronLab. Departamento Fisiología Humana, Histología Humana, Anatomía Patológica y Educación Física y Deportiva, Facultad de Medicina, Universidad de Malaga, 29071, Malaga, Spain.
Instituto de Investigación Biomédica de Málaga-IBIMA-Plataforma Bionand, Universidad de Malaga, 29071, Malaga, Spain.
Behav Brain Funct. 2024 Mar 28;20(1):6. doi: 10.1186/s12993-024-00230-5.
Spatial memory deficits and reduced neuronal survival contribute to cognitive decline seen in the aging process. Current treatments are limited, emphasizing the need for innovative therapeutic strategies. This research explored the combined effects of intranasally co-administered galanin receptor 2 (GALR2) and neuropeptide Y1 receptor (NPY1R) agonists, recognized for their neural benefits, on spatial memory, neuronal survival, and differentiation in adult rats. After intranasal co-delivery of the GALR2 agonist M1145 and a NPY1R agonist to adult rats, spatial memory was tested with the object-in-place task 3 weeks later. We examined neuronal survival and differentiation by assessing BrdU-IR profiles and doublecortin (DCX) labeled cells, respectively. We also used the GALR2 antagonist M871 to confirm GALR2's crucial role in promoting cell growth.
Co-administration improved spatial memory and increased the survival rate of mature neurons. The positive effect of GALR2 in cell proliferation was confirmed by the nullifying effects of its antagonist. The treatment boosted DCX-labeled newborn neurons and altered dendritic morphology, increasing cells with mature dendrites.
Our results show that intranasal co-delivery of GALR2 and NPY1R agonists improves spatial memory, boosts neuronal survival, and influences neuronal differentiation in adult rats. The significant role of GALR2 is emphasized, suggesting new potential therapeutic strategies for cognitive decline.
空间记忆缺陷和神经元存活减少导致衰老过程中认知能力下降。目前的治疗方法有限,这强调了需要创新的治疗策略。本研究探讨了经鼻腔共给予甘丙肽受体 2(GALR2)和神经肽 Y1 受体(NPY1R)激动剂的联合效应,这些激动剂因其对神经的益处而被认可,对成年大鼠的空间记忆、神经元存活和分化的影响。在成年大鼠经鼻腔共给予 GALR2 激动剂 M1145 和 NPY1R 激动剂后,3 周后用位置物体识别任务测试空间记忆。我们通过评估 BrdU-IR 图谱和双皮质素(DCX)标记细胞分别检查神经元存活和分化。我们还使用 GALR2 拮抗剂 M871 来确认 GALR2 在促进细胞生长中的关键作用。
共给药改善了空间记忆并提高了成熟神经元的存活率。其拮抗剂的中和作用证实了 GALR2 在细胞增殖中的积极作用。该治疗方法增加了 DCX 标记的新生神经元,并改变了树突形态,增加了具有成熟树突的细胞。
我们的研究结果表明,经鼻腔共给予 GALR2 和 NPY1R 激动剂可改善成年大鼠的空间记忆,促进神经元存活,并影响神经元分化。强调了 GALR2 的重要作用,为认知能力下降提供了新的潜在治疗策略。