Neurotrophin-3 (NT3) is a growth factor found in many body tissues including the heart, intestines, skin, nervous system and in skeletal muscles including muscle spindles (Murase et al., 1994). NT3 is required for the...Neurotrophin-3 (NT3) is a growth factor found in many body tissues including the heart, intestines, skin, nervous system and in skeletal muscles including muscle spindles (Murase et al., 1994). NT3 is required for the survival, correct connectivity and function of sensory (“proprioceptive”) afferents that innervate muscle spindles;these neurons express receptors for NT3 including tropomyocin receptor kinase C. These proprioceptive afferents are important for normal movement (Boyce and Mendell, 2014) and signals from muscle spindles are important for recovery of limb movement (e.g., after spinal cord lateral hemisection)(Takeoka et al., 2014). The level of NT3 declines in most tissues during postnatal development;its level is low in adult and elderly humans and other mammals (Murase et al., 1994). Elevation of NT3 has been shown to improve outcome in various animal models of neurological disease and injury. For example, many groups have shown that delivery of NT3 directly into the central nervous system promotes recovery after spinal cord injury but this often involved invasive routes or gene therapy (Boyce and Mendell, 2014;Petrosyan et al., 2015;Wang et al., 2018).展开更多
【目的】研究NT3对早期卵泡存活、发育、激素合成的影响及其可能的作用机制,同时探讨NT3和LIF在早期卵泡启动发育方面是否存在协同或叠加效应。【方法】分离新生4d大鼠卵巢随机分配至新鲜组、基础培养组、NT3组、LIF组和NT3+LIF组,在37...【目的】研究NT3对早期卵泡存活、发育、激素合成的影响及其可能的作用机制,同时探讨NT3和LIF在早期卵泡启动发育方面是否存在协同或叠加效应。【方法】分离新生4d大鼠卵巢随机分配至新鲜组、基础培养组、NT3组、LIF组和NT3+LIF组,在37℃培养箱中培养14 d,经固定、包埋、切片后进行组织形态学、PCNA免疫组化、TUNEL凋亡分析,RTPCR检测KL m RNA表达及检测培养液中激素水平。【结果】相比新鲜组和基础培养组,NT3组、LIF组、NT3+LIF组中的始基卵泡比例下降,生长卵泡比例升高,同时PCNA蛋白表达显著增加;TUNEL分析显示NT3组、LIF组、NT3+LIF组的凋亡指数均显著降低;NT3、LIF组、NT3+LIF组卵巢中KL m RNA的表达量分别是对照组的(3.38±0.43)倍、(2.02±0.20)倍、(2.07±0.21)倍。【结论】NT3在早期卵泡存活、发育中有促进作用,上调KL基因表达可能是NT3的作用机制之一。NT3和LIF单独或相加均能促进卵泡发育,但两者之间无明显协同或叠加效应。展开更多
基金funded by the Brain Research Trust,the Rosetrees Trust and the International Spinal Research Trusta grant from the European Research Council under the European Union’s Seventh Framework Programme(FP/2007-2013)+5 种基金ERC Grant Agreement n.309731by a Research Councils UK Academic Fellowshipby the Medical Research Council(MRC)and the British Pharmacological Society(BPS)’s Integrative Pharmacology Fundsupported by the Dowager Countess Eleanor Peel Trusta Capacity Building Award in Integrative Mammalian Biology funded by the Biotechnology and Biological Sciences Research Council,BPSHigher Education Funding Council for England,Knowledge Transfer Partnerships,MRC and Scottish Funding Council
文摘Neurotrophin-3 (NT3) is a growth factor found in many body tissues including the heart, intestines, skin, nervous system and in skeletal muscles including muscle spindles (Murase et al., 1994). NT3 is required for the survival, correct connectivity and function of sensory (“proprioceptive”) afferents that innervate muscle spindles;these neurons express receptors for NT3 including tropomyocin receptor kinase C. These proprioceptive afferents are important for normal movement (Boyce and Mendell, 2014) and signals from muscle spindles are important for recovery of limb movement (e.g., after spinal cord lateral hemisection)(Takeoka et al., 2014). The level of NT3 declines in most tissues during postnatal development;its level is low in adult and elderly humans and other mammals (Murase et al., 1994). Elevation of NT3 has been shown to improve outcome in various animal models of neurological disease and injury. For example, many groups have shown that delivery of NT3 directly into the central nervous system promotes recovery after spinal cord injury but this often involved invasive routes or gene therapy (Boyce and Mendell, 2014;Petrosyan et al., 2015;Wang et al., 2018).
文摘【目的】研究NT3对早期卵泡存活、发育、激素合成的影响及其可能的作用机制,同时探讨NT3和LIF在早期卵泡启动发育方面是否存在协同或叠加效应。【方法】分离新生4d大鼠卵巢随机分配至新鲜组、基础培养组、NT3组、LIF组和NT3+LIF组,在37℃培养箱中培养14 d,经固定、包埋、切片后进行组织形态学、PCNA免疫组化、TUNEL凋亡分析,RTPCR检测KL m RNA表达及检测培养液中激素水平。【结果】相比新鲜组和基础培养组,NT3组、LIF组、NT3+LIF组中的始基卵泡比例下降,生长卵泡比例升高,同时PCNA蛋白表达显著增加;TUNEL分析显示NT3组、LIF组、NT3+LIF组的凋亡指数均显著降低;NT3、LIF组、NT3+LIF组卵巢中KL m RNA的表达量分别是对照组的(3.38±0.43)倍、(2.02±0.20)倍、(2.07±0.21)倍。【结论】NT3在早期卵泡存活、发育中有促进作用,上调KL基因表达可能是NT3的作用机制之一。NT3和LIF单独或相加均能促进卵泡发育,但两者之间无明显协同或叠加效应。
