New botulinum neurotoxin constructs for treatment of chronic pain.

New botulinum neurotoxin constructs for treatment of chronic pain.
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DOI:
10.26508/lsa.202201631
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发表时间:
2023-06
影响因子:
4.4
通讯作者:
--
中科院分区:
生物学2区
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介绍了一种通过异肽键合制备治疗性肉毒杆菌神经毒素的新技术。这种新型加长肉毒杆菌神经毒素可以治疗神经损伤疼痛,而不会导致肌肉瘫痪。在人类社会中,慢性疼痛影响着五分之一的人,几乎没有可用的治疗选择。肉毒杆菌神经毒素(BoNT)可以通过抑制神经肽和神经递质的局部释放来提供持久的疼痛缓解,但其高度麻痹的性质限制了其镇痛潜力。蛋白质工程的最新进展提高了合成非麻痹肉毒杆菌分子用于翻译给疼痛患者的可能性。然而,通过几个合成步骤合成这些分子一直是具有挑战性的。在这里,我们描述了一种安全生产肉毒杆菌分子的简单平台,用于治疗神经损伤引起的疼痛。我们使用异肽结合系统从不同的肉毒杆菌部分生产了两种版本的异肽结合的BONT。尽管这两个分子都能在感觉神经元中裂解它们的天然底物SNAP25,但结构上拉长的iBoNT并不会导致大鼠的运动障碍。在大鼠神经损伤模型中,我们证明了非麻痹细长的iBoNT靶向特定的皮肤神经纤维,并提供持续的疼痛缓解。我们的结果表明,新型肉毒杆菌分子可以以一种简单和安全的方式生产,并可用于治疗神经病理性疼痛。
A new technique to make therapeutic botulinum neurotoxins via isopeptide bonding is described. The novel elongated botulinum neurotoxin can treat nerve injury pain without causing muscle paralysis. Chronic pain affects one in five people across human societies, with few therapeutic options available. Botulinum neurotoxin (BoNT) can provide long-lasting pain relief by inhibiting local release of neuropeptides and neurotransmitters, but its highly paralytic nature has limited its analgesic potential. Recent advances in protein engineering have raised the possibility of synthesising non-paralysing botulinum molecules for translation to pain sufferers. However, the synthesis of these molecules, via several synthetic steps, has been challenging. Here, we describe a simple platform for safe production of botulinum molecules for treating nerve injury–induced pain. We produced two versions of isopeptide-bonded BoNT from separate botulinum parts using an isopeptide bonding system. Although both molecules cleaved their natural substrate, SNAP25, in sensory neurons, the structurally elongated iBoNT did not cause motor deficit in rats. We show that the non-paralytic elongated iBoNT targets specific cutaneous nerve fibres and provides sustained pain relief in a rat nerve injury model. Our results demonstrate that novel botulinum molecules can be produced in a simple and safe manner and be useful for treating neuropathic pain.
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