老年和年轻的成年老鼠对高度选择性的神经素2受体激活剂有着相似的反应,这些激活剂会产生排尿和排便,而不会产生心血管方面的副作用
Jason B Cook1, Raymond Piatt1, Karl B Thor1
1Dignify Therapeutics LLC, NC, USA.
Neurourology and urodynamics
|November 26, 2025
概括
一种新型药物GR64349有效地刺激老老鼠的膀和肠道功能,而不会导致血压危险下降. 这一发现表明GR64349可能是对老年人膀和肠道功能不良的安全有效治疗方法.
科学领域:
- 老年学是一门学科.
- 神经药理学神经药理学
- 泌尿器科 泌尿器科 泌尿器科 泌尿器科
背景情况:
- 膀和肠道不活性在老年人中很普遍,影响生活质量.
- 神经素2受体 (NK2R) 激动剂显示出消除诱导的潜力,但往往有副作用.
- 低血压在老年人中是一个重大问题,增加了跌倒和受伤的风险.
研究的目的:
- 评价NK2R激动剂提高膀和结直肠压力的能力,而不会导致低血压.
- 为了确定每日NK2R激动剂在诱导老老鼠的排尿和排便时的疗效.
主要方法:
- 化囊泡测量和压力测量用于评估麻醉成年和老老鼠的膀和结直肠压力和血压.
- 评估了[Arg5,MeLeu9,Nle10]-NKA(4-10) (AMN-NKA) 和GR64349的作用. 这两种反应的作用是:
- 一个快速排空检测试验评估了老老鼠反复肌内注射GR64349剂量的疗效.
主要成果:
- 两种AMN-NKA和GR64349都增加了年轻成年和老老老鼠的膀和结直肠压力.
- AMN-NKA导致过渡性低血压,而GR64349没有.
- 肌肉内GR64349在两周的时间内在老老鼠中持续诱导排尿和排便,没有对血压产生不良影响.
结论:
- GR64349显示出作为改善膀和肠道功能的治疗剂的潜力.
- 这项研究强调了GR64349在老老鼠中的疗效,这表明它对老年人来说是一个有前途的治疗方法.
- GR64349提供了一种潜在的解决方案,可以治疗功能不良的膀和肠道,而不会造成低血压的风险.
相关概念视频
Adrenergic Receptors: β Subtype
3.4K
β-adrenoceptors have varied sensitivities towards adrenaline, noradrenaline, and isoprenaline. The order of agonist potency is as follows:
Isoprenaline > Adrenaline > Noradrenaline
Neurotransmitter binding to these receptors causes activation of adenylyl cyclase resulting in increased concentrations of cAMP and modulation of calcium ion channels within the cell. They are further classified into β1, β2, and β3 subtypes.
β1-adrenoceptors: β1-adrenoceptors...
Isoprenaline > Adrenaline > Noradrenaline
Neurotransmitter binding to these receptors causes activation of adenylyl cyclase resulting in increased concentrations of cAMP and modulation of calcium ion channels within the cell. They are further classified into β1, β2, and β3 subtypes.
β1-adrenoceptors: β1-adrenoceptors...
3.4K
Adrenergic Agonists: Direct-Acting Agents
2.6K
Drugs that mimic the action of endogenous catecholamines like noradrenaline and adrenaline are called adrenergic agonists or sympathomimetics. Based on their mechanism of action, sympathomimetics can be classified as direct-, indirect-, or mixed-acting sympathomimetics. Direct-acting adrenergic agonists activate adrenoceptors without affecting presynaptic neurons, making them independent of neuronal catecholamine-depleting agents like reserpine and guanethidine.
These agents can be classified...
These agents can be classified...
2.6K
Chemotherapy-Induced Nausea and Vomiting: Neurokinin-1 Receptor Antagonists
527
Neurokinin 1 (NK1) receptors are distributed across the GI tract, vagal afferents, and key CNS regions including the central vomiting center and chemoreceptor trigger zone (CTZ) Chemotherapy agents stimulate enterochromaffin cells in the gastrointestinal (GI) tract to release large amounts of substance P (SP). SP is a neuropeptide released by specific sensory nerves in response to many different stressors, including those in the GI mucosa affected by chemotherapy. SP binds and activates...
527
Adrenergic Receptors: ɑ Subtype
2.6K
Adrenoceptors are classified into α and ꞵ classes based on their potencies to catecholamine agonists. α-adrenoceptors show the following order of catecholamine potency:
Adrenaline ≥ Noradrenaline >> Isoprenaline
α-adrenoceptors are further divided into α1 and α2-adrenoceptors.
α1-Adrenoceptors: These receptors are located postsynaptically on the effector organs and cause constriction of smooth muscle mediated by activation of phospholipase...
Adrenaline ≥ Noradrenaline >> Isoprenaline
α-adrenoceptors are further divided into α1 and α2-adrenoceptors.
α1-Adrenoceptors: These receptors are located postsynaptically on the effector organs and cause constriction of smooth muscle mediated by activation of phospholipase...
2.6K
Antihypertensive Drugs: Vasodilators
2.0K
Vasodilators, primarily affecting the smooth muscles within arterial and venous walls, are commonly used for hypertension treatment. Medications such as minoxidil and hydralazine primarily target arteries and arterioles, while sodium nitroprusside acts on arterioles and venules. Minoxidil, functioning as a prodrug, is metabolized by hepatic sulfotransferase into its active form, minoxidil sulfate, after oral administration. This metabolite binds to the sulfonylurea receptor (SUR) component of...
2.0K
Heart Failure Drugs: Inhibitors of Renin-Angiotensin System
895
The activation of the sympathetic nervous system and the renin-angiotensin-aldosterone system (RAAS) contributes to cardiac remodeling, and inhibiting the RAAS is a pharmacological target in heart failure management. As a result, neurohumoral modulation is a crucial treatment principle for managing heart failure. This approach involves using medications like ACE inhibitors (ACEIs), angiotensin receptor blockers (ARBs), β-blockers, mineralocorticoid receptor antagonists (MRAs), and neutral...
895


