ArticleFASEB journal : official publication of the Federation of American Societies for Experimental Biology2022
α1-Antitrypsin derived SP16 peptide demonstrates efficacy in rodent models of acute and neuropathic pain.
Article in FASEB journal : official publication of the Federation of American Societies for Experimental Biology, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.
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Who cites it
9 citing papers in PubMed, 12 citations in OpenAlex.
- Human α1-Antitrypsin Inhibits Nociceptor Excitability and Relieves Inflammatory and Neuropathic Pain.Biomolecules · 2026Article
- LRP1 Activation Promotes Metabolic Reprogramming and Mrc1 Expression to Attenuate LPS-Induced Cognitive Deficits: An Integrated Omics Analysis.CNS neuroscience & therapeutics · 2026Article
- Schwann cell Lrp1 deletion drives trigeminal neuron sensitization and orofacial pain by modulating mitochondrial function and TRPV1/TRPA1 activity.The journal of headache and pain · 2025Article
- Alpha-1 Antitrypsin Mediates Spontaneous Resolution of Acute Gouty Inflammation Via Inhibiting Caspase 3/GSDME-dependent Macrophage Pyroptosis.Inflammation · 2025Article
- The low-density lipoprotein receptor-related protein-1 (LRP1) in Schwann cells controls mitochondria homeostasis in peripheral nerves.Progress in neurobiology · 2025Article
- Proteomic analysis of spinal dorsal horn in prior exercise protection against neuropathic pain.Scientific reports · 2025Article
- LRP1 mitigates intervertebral disc degeneration by inhibiting endoplasmic reticulum stress through stabilizing the PPARγ.Journal of orthopaedic translation · 2025Article
- Novel insights into the multifaceted and tissue-specific roles of the endocytic receptor LRP1.The Journal of biological chemistry · 2024Review
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Authors and funding
6 authors at 2 institutions in 1 country.
Funding
Abstract
SP16 is an innovative peptide derived from the carboxyl-terminus of α1-Antitrypsin (AAT), corresponding to residues 364-380, and contains recognition sequences for the low-density lipoprotein receptor-related protein-1 (LRP1). LRP1 is an endocytic and cell-signaling receptor that regulates inflammation. Deletion of Lrp1 in Schwann cells increases neuropathic pain; however, the role of LRP1 activation in nociceptive and neuropathic pain regulation remains unknown. Herein, we show that SP16 is bioactive in sensory neurons in vitro. Neurite length and regenerative gene expression were increased by SP16. In PC12 cells, SP16 activated Akt and ERK1/2 cell-signaling in an LRP1-dependent manner. When formalin was injected into mouse hind paws, to model inflammatory pain, SP16 dose-dependently attenuated nociceptive pain behaviors in the early and late phases. In a second model of acute pain using capsaicin, SP16 significantly reduced paw licking in both male and female mice (p < .01) similarly to enzymatically inactive tissue plasminogen activator, a known LRP1 interactor. SP16 also prevented development of tactile allodynia after partial nerve ligation and this response was sustained for nine days (p < .01). Immunoblot analysis of the injured nerve revealed decreased CD11b (p < .01) and Toll-like receptor-4 (p < .005). In injured dorsal root ganglia SP16 reduced CD11b
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