Pine Bark Extract: Properties, Uses & Lab FAQ
Pine Bark Extract: Properties, Uses & Lab FAQ
Pine Bark Extract is a polyphenol-rich botanical reagent derived from the bark of pine species, widely used in biomedical and pharmacological research for its potent antioxidant, anti-inflammatory, and vascular-protective properties.
- SKU
- P1449252
- Primary Active Constituents
- Oligomeric proanthocyanidins (OPCs), procyanidins, catechins, taxifolin, and phenolic acids
- Source Material
- Bark of pine trees (Pinus species)
- Primary Research Use
- Antioxidant, anti-inflammatory, and cardiovascular research; cell-based assays
- Cross-reference
- MCE-TJY: HY-N13233
- Physical Form
- Typically a fine brown to tan powder
What Is Pine Bark Extract and What Does It Contain?
Pine Bark Extract is a standardized botanical extract prepared from the outer bark of Pinus species. Its biological activity is primarily attributed to a complex mixture of polyphenolic compounds, most notably oligomeric proanthocyanidins (OPCs) and their monomeric precursors, including catechin and epicatechin. Additional constituents include procyanidins, taxifolin (a dihydroflavonol), and various phenolic acids such as ferulic acid and caffeic acid.
The precise polyphenol profile and concentration can vary depending on the pine species used, geographic origin, harvest season, and extraction method. Researchers should consult the certificate of analysis (CoA) supplied with each lot to confirm the specific composition and purity of the batch received (SKU P1449252).
What Are the Key Biological Activities Relevant to Research?
Pine Bark Extract has been extensively studied for several biological activities that make it a versatile tool in preclinical research:
- Antioxidant activity: OPCs and related polyphenols are potent free radical scavengers and can upregulate endogenous antioxidant enzymes. This property is frequently evaluated using DPPH, ABTS, or ORAC assays.
- Anti-inflammatory activity: The extract has been reported to modulate pro-inflammatory signaling pathways, including inhibition of NF-κB transcription factor activity and reduction of pro-inflammatory cytokine production (e.g., TNF-α, IL-6).
- Vascular and endothelial effects: Research suggests potential benefits on endothelial function, including effects on nitric oxide (NO) production and platelet aggregation.
- Neuroprotective and metabolic effects: Emerging research investigates its role in oxidative stress models relevant to neurodegenerative and metabolic diseases.
Researchers are encouraged to consult primary literature for specific mechanistic details, as in vitro findings may not directly translate to in vivo models.
Solubility, Reconstitution, and Handling Recommendations
Pine Bark Extract is a complex mixture and its solubility characteristics reflect those of its constituent polyphenols. General handling guidance is as follows:
- Aqueous solubility: The extract typically shows moderate to good solubility in water and aqueous buffers at standard research concentrations. Solubility may be enhanced by warming gently or by using ultrasonication.
- Organic solvents: Solubility is generally good in DMSO, ethanol, and methanol. For cell-based assays, DMSO stock solutions are commonly prepared; ensure the final DMSO concentration in culture medium does not exceed 0.1% v/v to avoid cytotoxic artifacts.
- Working solutions: Prepare fresh working solutions or aliquot stock solutions to avoid repeated freeze-thaw cycles, which can degrade polyphenolic constituents.
- Light and oxygen sensitivity: Polyphenols are susceptible to oxidative degradation. Prepare and store solutions under amber conditions or wrapped in foil, and minimize exposure to air.
Always refer to the product-specific CoA and safety data sheet (SDS) for verified solubility data for each lot.
Storage Conditions and Stability
Proper storage of Pine Bark Extract is essential to maintain its polyphenolic integrity and research reproducibility:
- Recommended storage temperature: Store the dry powder at −20 °C in a tightly sealed, desiccated container, protected from light. Short-term storage at 4 °C may be acceptable; consult the CoA for lot-specific guidance.
- Moisture: Polyphenol-rich extracts are hygroscopic. Always equilibrate the container to room temperature before opening to prevent condensation and subsequent degradation.
- Stability in solution: Solutions are less stable than dry powder. Prepared stock solutions should be stored at −20 °C under inert atmosphere (e.g., nitrogen or argon blanket) and used within the period specified on the CoA.
- Shelf life: Refer to the expiry date on the product label and CoA. Do not use material beyond the stated expiry without re-qualification.
Quality, Purity, and Regulatory Considerations
As a complex botanical extract, Pine Bark Extract (P1449252) is characterized differently from single-molecule compounds. Key quality considerations include:
- Standardization: Lots may be standardized to a minimum OPC or total polyphenol content by weight; this information is provided on the CoA. Researchers should record lot numbers in experimental records to ensure reproducibility across studies.
- Analytical methods: Characterization may include HPLC fingerprinting, total polyphenol content (Folin-Ciocalteu method), and antioxidant capacity assays. Consult the CoA for methods applied to your specific lot.
- Research use only: This product is supplied for in vitro and preclinical research use only and is not intended for human or veterinary therapeutic use, clinical trials, or food/supplement manufacturing without appropriate regulatory authorization.
- Cross-reference: The product corresponds to MCE-TJY catalog reference HY-N13233, which may assist in literature cross-referencing.
Frequently asked questions
What is Pine Bark Extract and which active compounds drive its research utility?
Pine Bark Extract is a standardized polyphenol-rich extract from the bark of Pinus species. Its primary bioactive constituents are oligomeric proanthocyanidins (OPCs), catechins, procyanidins, taxifolin, and phenolic acids. These compounds collectively confer antioxidant, anti-inflammatory, and vascular-modulatory activities that are the basis for its widespread use in preclinical biomedical research.
In which solvents can Pine Bark Extract be dissolved for cell-based assays?
Pine Bark Extract is generally soluble in DMSO, ethanol, and methanol for stock solution preparation, and shows moderate to good aqueous solubility in water and aqueous buffers. For cell-based assays, DMSO stock solutions are most commonly used; however, the final DMSO concentration in cell culture medium should not exceed 0.1% v/v to avoid cytotoxicity. Freshly prepared working solutions are recommended to minimize oxidative degradation of polyphenolic components.
How should Pine Bark Extract (P1449252) be stored to maintain stability?
The dry powder should be stored at −20 °C in a tightly sealed, light-protected, and desiccated container. Before opening, equilibrate the vial to room temperature to prevent moisture condensation. Prepared solutions should be aliquoted, stored at −20 °C under an inert atmosphere, and protected from light. Avoid repeated freeze-thaw cycles. Always consult the Certificate of Analysis for lot-specific expiry and storage recommendations.
Does Pine Bark Extract lot-to-lot variability affect experimental reproducibility?
As a complex botanical extract, Pine Bark Extract may exhibit some degree of lot-to-lot variability in polyphenol composition and concentration. To maximize reproducibility, researchers should always record the lot number used in experiments, obtain the Certificate of Analysis for each lot, and if possible, reserve sufficient material from a single well-characterized lot for a complete study series. Standardized lots with defined minimum OPC or total polyphenol content are preferable for quantitative research.
Is Aladdin's Pine Bark Extract (P1449252) suitable for in vivo studies?
This product is supplied for research use only and is intended primarily for in vitro applications and preclinical research. Researchers considering in vivo use should carefully review the product's purity grade, excipient content, and applicable regulatory requirements for animal studies in their institution. The product is not certified or intended for human therapeutic, clinical, or food/supplement use without appropriate regulatory authorization.
References
- Rohdewald P. A review of the French maritime pine bark extract (Pycnogenol), a herbal medication with a diverse clinical pharmacology. Int J Clin Pharmacol Ther. 2002;40(4):158-168.
- Packer L, Rimbach G, Virgili F. Antioxidant activity and biologic properties of a procyanidin-rich extract from pine (Pinus maritima) bark, pycnogenol. Free Radic Biol Med. 1999;27(5-6):704-724.
- Grether-Beck S, et al. Bioactives in plants: oligomeric proanthocyanidins from pine bark. Molecules. 2020 (general reference — verify specific citation details).
Products are supplied for research and development use only. Not for use in humans, animals, diagnosis, or therapy.
危险品化学品经营许可证（带存储）