Neurl1a-KO Mouse

Neurl1a, though no common aliases are provided in the given reference, is involved in a process related to protein ubiquitination. It appears to play a role in the regulation of cannabinoid receptor 1 (CB1) ubiquitination, which is associated with the endocannabinoid system pathway. This system is crucial in various physiological processes such as memory, mood, and pain perception, indicating the biological importance of Neurl1a [1].

In a study on ovariectomized mice, high-throughput sequencing showed that in 17β-estradiol (E2)-treated mice 3 months after ovariectomy (OVXLT), miR-221-5p decreased, leading to upregulation of Neurl1a/b, which promoted CB1 ubiquitination. This impairment was not seen in mice 1 week after ovariectomy (OVXST). Blood samples from postmenopausal women also indicated a decrease in miR-221-5p. Rescuing miR-221-5p or using a CB1 agonist could reverse the impairment of fear extinction in E2-treated OVXLT mice [1].

In conclusion, Neurl1a is involved in the ubiquitination of CB1, which is relevant to the "window of opportunity" for estrogen treatment in post-menopausal conditions. The study in ovariectomized mice, a form of in vivo research model, reveals that Neurl1a may play a role in the impaired memory-related processes associated with long-term post-menopause, potentially providing insights into improving hormone therapy for long-term menopausal women [1].

References:

1. Zhang, Kun, Yang, Qi, Yang, Le, Liu, Shui-Bing, Zhao, Ming-Gao. 2019. CB1 agonism prolongs therapeutic window for hormone replacement in ovariectomized mice. In The Journal of clinical investigation, 129, 2333-2350. doi:10.1172/JCI123689. https://pubmed.ncbi.nlm.nih.gov/31063987/