apl-1 Antibody
Description
Definition and Target Overview
apl-1 Antibody refers to antibodies targeting the amyloid precursor-like protein 1 (APL-1 or APLP-1), a transmembrane metalloprotein involved in neuronal development, synaptic function, and intracellular trafficking. APL-1 is a homolog of the amyloid precursor protein (APP) and is conserved across species, including humans (Homo sapiens) and the nematode Caenorhabditis elegans .
Biological Role of APL-1
APL-1 regulates critical processes in neurons:
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Synaptic Transmission: APL-1 modulates synaptic function, as shown in C. elegans studies where knockdown of apl-1 led to hypersensitivity to the acetylcholinesterase inhibitor aldicarb, indicating defects in neurotransmission .
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Axon Regeneration: APL-1 inhibits axon regeneration in mature neurons, acting through its extracellular E2 domain .
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Intracellular Trafficking: APL-1 trafficking depends on small GTPases like RAB-5 and UNC-108, which regulate its expression in neurons .
Applications of APL-1 Antibodies
Antibodies against APL-1 are widely used in research for:
Synaptic Function in C. elegans
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Knockdown Effects: RNAi-mediated suppression of apl-1 causes aldicarb hypersensitivity, rescued by transgenic expression of full-length APL-1 in a dose-dependent manner .
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Genetic Interactions: APL-1 expression is regulated by kinesins (UNC-104, UNC-116) and GTPases (RAB-5, UNC-108), linking it to vesicle transport pathways .
Axon Regeneration Inhibition
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APL-1 restricts axonal regrowth post-injury in C. elegans GABAergic motor neurons.
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The E2 domain of APL-1 is essential for this inhibitory function, independent of its cytoplasmic domain .
Human APLP-1 Expression
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APLP-1 is highly expressed in human neuronal tissues (e.g., brain cortex) and cancer cell lines (e.g., TT medullary thyroid cancer cells) .
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Antibody validation in human samples confirms specificity for cytoplasmic APLP-1 .
Clinical and Preclinical Relevance
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Neurological Disorders: APL-1’s role in synaptic function and axon repair links it to neurodegenerative diseases (e.g., Alzheimer’s) .
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Cancer Research: APLP-1 is overexpressed in certain cancers (e.g., neuroblastoma), making it a potential biomarker .
Challenges and Future Directions
Product Specs
Constituents: 50% Glycerol, 0.01M PBS, pH 7.4
Target Background
- Research suggests that APL1-D2 binds Cu(I) and Cu(II) with insufficient strength to sustain catalysis, indicating that it does not play a significant role in copper handling in C. elegans. PMID: 24276282
- Hypothetical models have been proposed to elucidate how sAPL-1 signaling influences metabolic and developmental pathways. PMID: 23044509
- [review] Both loss and overexpression of APL-1 result in lethality, highlighting the importance of maintaining homeostatic levels of APL-1, particularly within neurons. PMID: 22038715
- Pan-neuronal expression of APL-1, the Caenorhabditis elegans ortholog of APP, disrupts several behaviors, including olfactory and gustatory learning behavior and touch habituation. PMID: 22836251
- Signaling of the released APL-1 fragment modulates multiple metabolic states, underscoring the requirement for APL-1 throughout development. PMID: 22466039
- Cholesterol and lrp-1 are implicated in the regulation of synaptic transmission, similar to apl-1. PMID: 22363792
- A critical cis-regulatory element of apl-1 transcription has been identified. PMID: 21150118
- Loss of apl-1 leads to neurotransmission defects. PMID: 20862215
- The x-ray structure of the E2 domain of APL-1 has been elucidated. PMID: 19906646
- The 5' UTR of the Aplp1 gene lacks any type of CAGA box. PMID: 15208260
- APL-1 functions non-cell-autonomously during development. PMID: 17267616
- apl-1 expression is upregulated during the last larval stage in hypodermal seam cells, a process that is transcriptionally regulated by hbl-1, lin-41, and lin-42. PMID: 18262516
