In-vitro and preclinical literature on Thymosin Alpha-1, Kisspeptin-10, IGF-1 LR3, IGF-1 DES(1-3): mechanisms, model systems and 19 PubMed-linked references.
✔ PubMed-linked citations ✔ In-vitro and preclinical only ✔ Research Use Only
This class groups peptides and protein analogs that act as ligands for growth-factor and immunomodulatory receptor systems studied in cell culture and animal models. It spans thymic immunopeptides that modulate innate immune receptor signaling (Thymosin Alpha-1), a hypothalamic RF-amide neuropeptide fragment that activates a G protein-coupled receptor (Kisspeptin-10), and engineered analogs of insulin-like growth factor-I with reduced IGF-binding-protein affinity (IGF-1 LR3 and IGF-1 DES(1-3)). Research contexts range from receptor binding, second-messenger signaling and cytokine assays to myoblast, satellite-cell and organ-growth studies in preclinical species. The literature summarized here is restricted to in-vitro, mechanistic and preclinical animal work; these materials are supplied for laboratory research use only and are not for human or veterinary use.
This page collects 19 peer-reviewed references across 4 compounds. Every citation links to its PubMed record so the primary source can be read in full. The selection is limited to in-vitro, ex-vivo and preclinical animal studies and mechanistic reviews; human clinical literature is deliberately excluded because Liv Pure products are supplied for laboratory research only.
Also known as: Talpha1; Ta1; thymalfasin; 28-amino-acid N-terminally acetylated peptide derived from prothymosin alpha
Molecular target or pathway: Modulation of innate immune receptor signaling in dendritic cells, including Toll-like receptor pathways and indoleamine 2,3-dioxygenase-dependent programs affecting T-cell responses
Origin: Endogenous thymic peptide fragment (acetylated N-terminal 28 residues of prothymosin alpha); studied as a synthetic/recombinant peptide
Thymosin Alpha-1 is a thymus-derived immunopeptide investigated in cell-culture and rodent models for its effects on dendritic-cell maturation, cytokine production and lymphocyte responses. The literature characterizes it as a modulator of innate immune receptor signaling rather than a direct effector, with context-dependent effects reported across viral- and bacterial-stimulus systems. Studies summarized here are in-vitro or preclinical and mechanistic in nature.
Liv Pure supplies Thymosin Alpha-1 as a lyophilized research reagent with a lot-specific certificate of analysis.
Selected references
Also known as: KP-10; kisspeptin-10 (metastin 45-54); C-terminal decapeptide of the KiSS-1 gene product; RF-amide neuropeptide
Molecular target or pathway: Agonist of the G protein-coupled receptor KISS1R (GPR54/AXOR12/hOT7T175), coupling to phospholipase C, IP3-receptor and intracellular calcium signaling
Origin: Endogenous fragment; the C-terminal 10 residues of the kisspeptin family of peptides encoded by the KiSS-1 gene, studied as a synthetic peptide
Kisspeptin-10 is the shortest fully active C-terminal fragment of the kisspeptin family, characterized as a potent agonist of the receptor KISS1R/GPR54. In vitro and ex-vivo studies describe activation of phospholipase C and calcium signaling and excitatory effects on cultured gonadotropin-releasing-hormone neurons. The references summarized here focus on receptor identification, signaling mechanism and neuronal electrophysiology in cell and preclinical models.
Liv Pure supplies Kisspeptin-10 as a lyophilized research reagent with a lot-specific certificate of analysis.
Selected references
Also known as: Long R3 IGF-I; LR3-IGF-I; Long Arg3 IGF-I; recombinant IGF-I analog with an N-terminal 13-residue extension and Arg substitution at position 3
Molecular target or pathway: Type-1 insulin-like growth factor receptor (IGF-1R); engineered for markedly reduced binding to IGF-binding proteins (IGFBPs)
Origin: Synthetic/recombinant analog of human IGF-I carrying an N-terminal peptide extension and an Arg-for-Glu substitution at position 3
IGF-1 LR3 is an engineered IGF-I analog designed to retain IGF-1R binding while binding IGF-binding proteins with much lower affinity, which makes it a widely used reagent for probing IGF signaling in the presence of endogenous IGFBPs. In-vitro and preclinical studies use it to stimulate proliferation and signaling in cultured cells and to examine organ and tissue growth in animal models. The references summarized here are cell-culture and preclinical animal studies plus recombinant-protein characterization.
Liv Pure supplies IGF-1 LR3 as a lyophilized research reagent with a lot-specific certificate of analysis.
Selected references
Also known as: des(1-3)IGF-I; des-(1-3)-IGF-I; DES(1-3) IGF-I; truncated IGF-I analog lacking the N-terminal tripeptide Gly-Pro-Glu
Molecular target or pathway: Type-1 insulin-like growth factor receptor (IGF-1R); N-terminal truncation greatly reduces affinity for IGF-binding proteins (IGFBPs)
Origin: Synthetic/recombinant truncated analog of human IGF-I lacking the first three N-terminal residues (Gly-Pro-Glu)
IGF-1 DES(1-3) is a naturally occurring and synthetically produced truncated form of IGF-I that retains IGF-1R binding but has strongly reduced affinity for IGF-binding proteins. This property makes it a common in-vitro reagent for distinguishing IGFBP-dependent from IGFBP-independent IGF effects, and it frequently shows higher apparent potency than intact IGF-I in cultures containing membrane- or matrix-associated IGFBPs. The references summarized here are cell-culture and comparative in-vitro potency studies.
Liv Pure supplies IGF-1 DES(1-3) as a lyophilized research reagent with a lot-specific certificate of analysis.
Selected references
The literature associates each compound with a distinct target system: Thymosin Alpha-1 is reported to modulate innate immune receptor signaling (including Toll-like receptor pathways) in dendritic cells; Kisspeptin-10 is characterized as an agonist of the G protein-coupled receptor KISS1R/GPR54, coupling to phospholipase C, IP3-receptor and calcium signaling; and IGF-1 LR3 and IGF-1 DES(1-3) are analogs that bind the type-1 IGF receptor while showing reduced affinity for IGF-binding proteins. Consult the per-compound references for the specific assay systems in which these interactions were measured.
The cited studies use transfected cell lines (e.g. CHO cells expressing GPR54/KISS1R, GT1-7 neuronal cells, endometrial and neuroblastoma lines), primary and cultured cells (monocyte-derived dendritic cells, myoblasts, satellite cells), ex-vivo tissue and brain-slice preparations, and preclinical animal models such as rodents and fetal sheep. The references note the exact model for each observation; clinical human studies are outside the scope of this library.
The references collected here characterize receptor binding, signaling, gene expression and tissue- or cell-level responses in vitro and in preclinical animal models. They do not establish human clinical outcomes, dosing, safety or efficacy, and this page makes no such claims. Handling, reconstitution and storage conditions should follow each lot's certificate of analysis and standard laboratory practice for lyophilized peptides and recombinant proteins.
All compounds referenced on this page are supplied by Liv Pure for in-vitro laboratory research only and are not for human or animal use. Nothing on this page is medical advice, and no statement here has been evaluated by the Food and Drug Administration. Product identity and purity for each lot are documented on the certificate of analysis; our Testing and Quality page explains what those certificates do and do not measure. Browse the Growth Factors & Immunopeptides category to see current lots.
Liv Pure supplies research-grade synthetic peptides and laboratory reagents to qualified researchers and institutions. Every lot ships with a lot-specific certificate of analysis.
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