Introduction
D-Leucine is the non-proteinogenic D-enantiomer of the essential branched-chain amino acid leucine. Unlike its L-isomer, which is incorporated into proteins and activates key metabolic pathways like mTOR, D-leucine is not utilized in mammalian protein synthesis. This unique property underlies its distinct biological activities. Recent groundbreaking research has identified D-leucine as a potent anti-seizure agent, demonstrating efficacy superior to L-leucine in preclinical models. It is also found in certain foods and is produced by bacteria. This product is offered as a high-purity chemical for research and development purposes.
Physical & Chemical Parameters
| Parameter | Specification / Value | Notes / Method |
|---|---|---|
| Specific Optical Rotation [α]²⁰/D | -14° to -15° (c=4 in 6N HCl) | Key identifier for enantiomeric purity. |
| Melting Point | ~293 °C (decomposes) | |
| Solubility in Water | ~10 mg/mL (~76 mM) | Soluble with sonication (<60°C). |
| Solubility in DMSO | <1 mg/mL (Practically insoluble) | |
| pH (in solution) | 5.5 - 6.5 | |
| Loss on Drying | ≤0.5% |
Mechanism of Action
D-Leucine's mechanism of action is distinct from traditional anticonvulsants and its L-form counterpart, representing a novel pathway in seizure control.
- Distinction from L-Leucine: L-Leucine is a potent activator of the mTORC1 signaling pathway and is ketogenic. In contrast, D-leucine does not stimulate mTOR activity. This is crucial because mTOR hyperactivity is linked to some epilepsy pathologies, suggesting D-leucine may offer a safer profile without promoting this potentially detrimental signaling.
- Novel & Rapid Seizure Suppression: Preclinical studies show that D-leucine can potently terminate ongoing seizures even after their onset, an effect not always seen with L-leucine. Remarkably, it has demonstrated efficacy at least comparable to diazepam in suppressing seizures.
- Modulation of Synaptic Plasticity: In vitro electrophysiology studies indicate that D-leucine (but not L-leucine) reduces long-term potentiation (LTP)-a cellular correlate of learning and memory that can be dysregulated in epilepsy-without affecting basal synaptic transmission. This suggests it targets specific hyperexcitable neural circuits.
- Unknown High-Affinity Target: Screening indicates D-leucine does not compete for binding at known neuronal receptor sites for standard ligands, pointing to a novel, unidentified molecular target in the mammalian nervous system.
- Biofilm Disruption: In microbiological research, D-amino acids like D-leucine have been shown to trigger the disassembly of bacterial biofilms, offering a tool to study microbial communities and persistence.
Key Benefits & Advantages
- Promising Novel Anti-Seizure Profile: Offers a new research direction for treatment-resistant epilepsy, with potent seizure-terminating capability.
- Unique Mechanism: Acts independently of mTOR activation and classical neurotransmitter receptors, potentially avoiding side effects associated with these pathways.
- Research Tool for Neuroscience: A valuable compound for investigating the roles of D-amino acids in eukaryotic neurobiology and synaptic plasticity.
- Tool for Microbiology: Useful in studying bacterial communication, biofilm formation, and dispersal mechanisms.
- High Purity & Specification: Guaranteed chemical and enantiomeric purity, supported by detailed analytical data including specific optical rotation.
Primary Applications
- Neuroscience & Epilepsy Research: Lead compound for studying novel anti-seizure mechanisms and developing new therapeutic strategies for refractory epilepsy.
- Biochemical & Pharmacological Studies: Used as an enantiomeric control in experiments involving L-leucine, and to probe specific biological effects of the D-amino acid form.
- Microbiology & Biofilm Research: Applied in studies to inhibit or disrupt bacterial biofilms of pathogens like Enterococcus faecalis.
- Analytical Standard: Serves as a reference standard in chromatographic (HPLC, CE) and spectroscopic analysis for amino acid quantification and identification.
FAQ: Frequently Asked Questions
Q: What is the key difference between D-Leucine and L-Leucine?
A: They are mirror-image molecules (enantiomers). L-Leucine is a protein-building block that activates anabolic pathways (mTOR). D-Leucine is not used in mammalian protein synthesis and has been found to possess distinct biological activities, most notably potent anti-seizure effects through a different, novel mechanism.
Q: Is D-Leucine a dietary supplement for epilepsy?
A: No. The anti-seizure data is from preclinical animal research. This product is sold strictly for research purposes. Its safety and efficacy in humans have not been established. It is not intended for diagnostic, therapeutic, or personal use.
Q: Where is D-Leucine found?
A: D-Leucine is present in some foods due to bacterial action and is also produced by various bacteria.
Q: How do I prepare a solution of D-Leucine for cell culture experiments?
A: D-Leucine is soluble in water (~10 mg/mL). For in vitro assays, it can be dissolved directly in aqueous buffers or culture medium with brief sonication. For in vivo studies, it may be prepared in sterile saline.
Contact Us
Unlock the potential of this unique bioactive compound in your next discovery project. Our high-purity D-Leucine is characterized and supplied with comprehensive analytical data to ensure reliable and reproducible results.
Contact our technical sales team today to: Get a competitive quote for R&D or bulk quantities.
Please contact us at ella.zhang@huilinbio-tech.com.
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