相关实验视频
Updated: Jan 22, 2026
12:11
A Rhodopsin Transport Assay by High-Content Imaging Analysis
Published on: January 16, 2019
6.9K
早期的棒功能障碍影响了Rhodopsin P23H鼠标视网膜色素炎模型中的形发育
Alicia A Brunet1,2,3, Annie L Miller1,2, Xin Ru Lim1
1Lions Eye Institute, 2 Verdun St., Nedlands, WA 6009, Australia.
概括
圆光受体可能会补偿早期视网膜色素炎的杆变性. 这项对RhoP23H.GFP小鼠的研究揭示了早期发育期间型数量的增加,这表明了补偿性适应.
科学领域:
- 眼科医生 眼科 眼科
- 神经科学是一个神经科学.
- 遗传学 是一个遗传学.
背景情况:
- 自体主导性视网膜色素炎 (RP) 经常在RhoP23H/WT小鼠中进行研究,重点关注以后的视网膜变化.
- 在RP模型中,早产后视网膜发育尚未得到充分研究,特别是在补偿机制方面.
- 之前的研究指出,视网膜内部的厚化是对杆变性反应.
研究的目的:
- 在一个新的RhoP23H.GFP记者小鼠系中调查早期视网膜对杆功能障碍的反应.
- 分析罗多普辛P23H突变在产后发育期间对形光受体的影响 (P8-P24).
- 确定形光受体是否表现出补偿性变化,以应对早期的杆变性.
主要方法:
- 使用了一种新的RhoP23H.GFP记者小鼠线路,在形光受体中表达GFP.
- 进行了组织学分析,以评估视网膜厚度和形态.
- 采用流细胞计量来量化不同出生后年龄段的形光受体数量 (P12,P16,P24).
主要成果:
- 在RhoP23H.GFP小鼠和对照小鼠之间没有观察到视网膜整体厚度的显著差异.
- 罗多普辛错位化到杆细胞体是暂时的,通过P24正常化.
- 在RhoP23H.GFP小鼠中,在P12,P16和P24处发现了显著增加的形光受体数量.
- 在患病的视网膜中观察到形态的变化.
结论:
- 圆光受体可能经历发育补偿性适应,以应对早期的棒功能障碍.
- 这些发现为视网膜色素炎早期疾病机制提供了新的见解.
- 在研发过程中,RhoP23H.GFP模型对于研究RP中的圆反应非常有价值.
相关概念视频
01:11Channel Rhodopsins
3.1K
Most organisms use photoreceptors to sense and respond to light. Examples of photoreceptors include bacteriorhodopsins and bacteriophytochromes in some bacteria, phytochromes in plants, and rhodopsins in the photoreceptor cells of the vertebral retina. The light-sensitive property of these receptors is because of the bound chromophores, such as bilin in the phytochromes and retinal in the rhodopsins.
Rhodopsins belong to the family of cell surface proteins called G-protein coupled receptors,...
Rhodopsins belong to the family of cell surface proteins called G-protein coupled receptors,...
3.1K
01:22Bioavailability: Influencing Factors
351
Bioavailability refers to the extent and rate at which a drug reaches systemic circulation in its active form. Extent refers to the amount of the drug that makes it into circulation, while rate is the speed at which it enters circulation. It is influenced by several factors critical for optimizing drug formulations, dosing regimens, and therapeutic outcomes.Physicochemical properties of drugs and formulationsThe solubility, stability, and dissolution rate of a drug significantly impact its...
351
01:29The Influence of Affect on Cognition
268
Positive affect significantly influences cognitive processes, including evaluation, memory, creativity, and social judgments. Compared to negative affect, positive emotional states promote more favorable interpretations of stimuli, cognitive flexibility, and heuristic processing. These effects highlight emotions' powerful role in shaping how individuals perceive, remember, and interact with the world.Influence on Evaluation and AttributionWhen individuals experience positive affect, they are...
268
01:29The Influence of Cognition on Affect
194
Cognition plays a pivotal role in shaping emotional experiences, as demonstrated by Schachter and Singer’s two-factor theory of emotion. According to this model, emotion arises from a combination of physiological arousal and cognitive interpretation. The body’s physiological response to stimuli is ambiguous and only gains emotional significance through cognitive labeling. For instance, an increased heart rate and adrenaline surge while standing near an attractive person may be...
194
01:30Biological Influences on Intelligence
493
Intelligence is often thought to be linked to brain size, but the relationship is more complex than that. While brain size does correlate modestly with some abilities, like verbal skills, the connection is weaker for others, such as spatial reasoning. Other factors, like brain structure, also play crucial roles. For instance, despite Einstein's smaller-than-average brain, his parietal cortex, which is involved in spatial reasoning, was 15% wider, suggesting that neural density might matter...
493
01:29Environmental Influences on Intelligence
904
Despite the strong genetic influence on traits like intelligence, environmental factors significantly shape outcomes. For example, while over 90% of height variation is due to genetic differences, environmental factors such as nutrition also have a notable impact. Similarly, for intelligence, changes in a child's surroundings can significantly alter their IQ. Research shows that enriched environments boost children's academic success and help them develop key cognitive skills. Children...
904