PEGylation of Lipids

Name: PEGylation of Lipids
Brand: BOC Sciences

PEGylated lipids are compounds formed by covalently linking polyethylene glycol (PEG) to lipid molecules. The core concept is to leverage the hydrophobic–hydrophilic properties of PEG chains to enhance lipid solubility and biocompatibility, thereby improving the performance of lipid-based carriers. PEG chains are typically attached in linear or branched forms to the polar head or hydrophobic tail of lipid molecules, forming stable PEGylated lipid structures through chemical bonds. In nanomedicine, PEGylated lipids are commonly used in liposomes, solid lipid nanoparticles (SLNs), and lipid nanoparticles (LNPs). By forming a PEG layer on the lipid membrane surface, they reduce protein adsorption in the bloodstream, prolong circulation time, and improve drug bioavailability and efficacy. At BOC Sciences, we provide comprehensive custom PEGylated lipid synthesis services, covering the full process from lipid design and PEG selection to the preparation of high-purity products. With advanced laboratory facilities, extensive synthesis experience, and rigorous quality control, we deliver high-quality, reproducible PEGylated lipids for drug delivery, liposome, and nanoparticle research.

Explore Our Custom PEGylated Lipids – BOC Sciences

We support various PEG chain structures (linear or branched) and a range of molecular weights (500–5000 Da and above), with adjustable PEG length and density to optimize carrier performance. Whether for liposomes, lipid nanoparticles, emulsion carriers, or functionalized delivery systems, we provide end-to-end support from molecular design and chemical synthesis to carrier assembly and characterization.

PEGylated Phospholipids Custom products including DSPE-PEG, DPPE-PEG with different PEG molecular weights and branching. PEG terminal functional groups (carboxyl, amino, maleimide) can be modified for conjugation purposes. Purification, characterization, and small-scale laboratory assembly services are available for liposome and nanoparticle R&D.
PEGylated Triglycerides PEG-DSG and other PEGylated triglyceride lipids with adjustable PEG length and density. Customizable assembly for hydrophobic drug carriers, including emulsion nanoparticles and mixed liposome systems. Chemical purification, quality control, and small-batch preparation services ensure carrier stability and reproducibility.
PEGylated Liposomes Multiple PEGylated lipid combinations for constructing long-circulation liposomes with varying PEG chain lengths and molecular weights. Functionalized PEGylated lipids for targeted delivery or drug conjugation are available upon request. Laboratory and pilot-scale services for liposome assembly, size control, and surface PEG density optimization.
PEGylated Lipid Nanoparticles LNP assembly services compatible with PEGylated lipids for mRNA, siRNA, and small molecule drug delivery systems. Support for different PEG molecular weights and linear/branched structures to optimize particle stability and circulation. Custom R&D services for LNP assembly, size control, and surface PEG density adjustment.
Cationic PEG-Lipid Cationic PEGylated lipids such as PEG-DOPE-NH₂ and DOTAP-PEG for nucleic acid complex preparation. Customizable PEG terminal functional groups for ligand or drug conjugation. Nucleic acid-lipid complex assembly services, including particle size control, stability optimization, and characterization.
Functional PEG-Lipid Lipids with PEG terminal groups such as carboxyl, amino, or maleimide, fully customizable. Supports different PEG chain lengths, branching, and density for drug conjugation or targeted modifications. Chemical synthesis, purification, characterization, and small-scale laboratory assembly services are provided.

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Whether you need PEGylated lipids, peptides, proteins, or small molecules, our experts can design and deliver tailored PEGylation solutions for your project.

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Tailored PEGylated Lipid Services for Your Research

We offer flexible adjustment of PEG chain structure, molecular weight, and terminal functionalization for liposomes, lipid nanoparticles, nucleic acid delivery systems, and targeted carriers. With a mature chemical synthesis platform, nanocarrier assembly technology, and strict quality control, we provide reliable, efficient PEGylated lipid R&D and application support worldwide.

Molecular Design and Customization Supports linear and branched PEG chains, with molecular weights (500–5000 Da and above) and chain lengths adjustable per client requirements. Customizable PEG terminal groups including carboxyl, amino, and maleimide for drug conjugation or targeted modifications. Multiple lipid combinations (phospholipids, triglycerides, cationic lipids) to meet diverse nanocarrier and delivery system design needs. Personalized molecular design to optimize PEG density, distribution, and functionalization for improved carrier stability and performance.
Chemical Synthesis and High-Purity Production Efficient, reproducible PEGylated lipid synthesis using amide, ester, and click chemistry methods. Custom products with different molecular weights and functional modifications to ensure precise and controlled structures. Complete purification and quality control, including column chromatography, ultrafiltration, and HPLC analysis for high-purity products. Small-batch to pilot-scale production to meet research and drug development needs.
Nanocarrier Assembly and Optimization Assembly services for liposomes, lipid nanoparticles, and emulsion carriers. Supports rational distribution and density control of PEGylated lipids on the carrier surface to optimize circulation and stability. Functionalized PEGylated lipids can be incorporated for targeted carriers or drug conjugation. Particle size control, drug-loading optimization, and surface modification services to ensure consistent nanocarrier performance.
Characterization, Analysis, and Technical Support Chemical structure characterization using MS, NMR, HPLC, and other techniques. Nanocarrier size analysis, DLS, and stability testing to ensure compliance with R&D standards. Guidance on experimental design and application solutions, including drug delivery, nucleic acid delivery, and targeting optimization. Technical consultation and problem-solving support throughout preclinical development.

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Why Choose BOC Sciences for PEGylated Lipid Services?

Professional R&D Team: Experienced biochemistry and lipid chemistry experts providing end-to-end support from molecular design to carrier optimization.
Custom PEGylated Lipids: Tailored PEG chain structures, molecular weights, and terminal functional groups to meet diverse research and drug delivery needs.
High-Precision Chemical Synthesis: Proven amide, ester, and click chemistry methods ensure high-purity, reproducible PEGylated lipids.
Nanocarrier Assembly Technology: Liposome, lipid nanoparticle, and emulsion carrier assembly with controllable particle size, surface PEG density, and drug loading.
Comprehensive Characterization and QC: MS, NMR, HPLC, and DLS ensure accurate structure and stable nanoparticles suitable for lab and development needs.
Customer Support and Technical Consultation: Guidance on experimental design, application optimization, and problem-solving from basic research to preclinical development.
Advanced Facilities and Flexible Production: Modern labs and pilot-scale production for small-scale research samples to pilot manufacturing, ensuring efficient and reliable delivery.

BOC Sciences PEGylated Lipid Service Process Overview

BOC Sciences provides end-to-end PEGylated lipid services, covering all stages from basic research to drug development. By integrating mature chemical synthesis techniques, nanocarrier assembly capabilities, and strict quality control, we deliver high-quality, customizable PEGylated lipid solutions to ensure efficient progress of your R&D projects.

Requirement Communication & Project Design We engage in detailed discussions with clients to understand their application scenarios, research goals, and carrier type requirements. By considering lipid type, PEG chain length, terminal functional groups, and other parameters, we develop personalized molecular design plans. Our team offers recommendations and optimization strategies to ensure the design achieves optimal delivery performance and experimental feasibility.
Molecular Design & Structural Optimization Based on client requirements, we design PEGylated lipid molecules, optimizing lipid combinations, PEG chain length, density, and terminal functionalization to enhance nanocarrier stability and circulation performance. The design process incorporates physicochemical properties and application needs, ensuring rational carrier structures, controllable functionalization, and suitability for various delivery systems in research or development.
Chemical Synthesis & Purification Using established chemical synthesis methods such as amidation, esterification, and click chemistry, PEGylated lipids are synthesized, purified, and subjected to preliminary quality control. Strict control of reaction conditions and purification processes ensures high purity and reproducibility, providing reliable materials for subsequent nanocarrier assembly and application studies.
Nanocarrier Assembly We provide assembly services for liposomes, lipid nanoparticles, emulsion carriers, and more, with precise control over particle size, surface PEG density, and drug loading efficiency. Functionalized PEGylated lipids can be incorporated with targeting molecules or drugs to achieve targeted delivery and controlled release. Flexible, high-quality assembly services are available for both laboratory and pilot-scale needs.
Characterization & Quality Control Advanced analytical techniques including MS, NMR, HPLC, and DLS are used to characterize PEGylated lipids and assembled carriers in terms of structure, purity, particle size, and stability. Detailed reports are provided to ensure products meet R&D standards, guarantee experimental reproducibility, and supply reliable data for subsequent applications.
Technical Support & Delivery During product delivery, we provide guidance on experimental procedures, application optimization, and problem-solving to ensure smooth use of materials in research or development. Customized packaging, batch specifications, and delivery scheduling are supported, along with full technical service, enabling projects to proceed efficiently and achieve intended scientific or development goals.

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Key Research Applications of PEGylated Lipids

PEGylated lipids are key tools in modern nanomedicine and biopharmaceutical research due to their excellent solubility, low immunogenicity, and long-circulation properties. By controlling PEG chain length, density, and terminal functionalization, PEGylated lipids significantly enhance carrier stability, targeting, and drug delivery efficiency, playing a critical role in drug delivery, lipid nanoparticles, targeted therapy, and vaccine development.

Drug Delivery Systems PEGylated lipids form a hydrophilic barrier on liposome surfaces, prolonging circulation time in the bloodstream. Enhance solubility and stability, supporting delivery of hydrophobic and poorly soluble drugs. Functionalized PEGylated lipids enable drug conjugation for improved therapeutic precision and safety. Applicable to anticancer, anti-infective, and other long-acting drug development.
Lipid Nanoparticles (LNPs) PEGylated lipids form a protective layer on LNPs, improving particle stability and preventing rapid clearance in vivo. Protect nucleic acid drugs (mRNA, siRNA, DNA) from enzymatic degradation, increasing delivery efficiency. Support particle size control and surface PEG density optimization for controlled release and high drug loading. Widely applied in gene therapy, nucleic acid vaccines, and small molecule drug delivery systems.
Targeted Therapy & Imaging Functionalized PEGylated lipids can be conjugated with peptides, antibodies, or small molecule ligands for tissue- or cell-specific targeting. Can incorporate fluorescent, radioactive, or MRI imaging probes for in vivo nanoparticle tracking and imaging. Enhance drug delivery precision, imaging sensitivity, and therapeutic efficacy while reducing off-target toxicity. Support tumor-targeted drug delivery, targeted imaging, and precision therapy research.
Vaccines & Immunotherapeutics PEGylated lipids stabilize lipid nanoparticle carriers, optimizing antigen delivery efficiency. Prolong circulation time and reduce nonspecific immune recognition to enhance vaccine efficacy. Support customized design and delivery of mRNA, protein antigens, and other vaccine carriers. Functionalized PEGylated lipids enable targeted delivery to enhance immune response and safety.

Frequently Asked Questions

Still have questions?

What is a PEGylated lipid?
A PEGylated lipid is a lipid molecule that has been covalently linked to polyethylene glycol (PEG). This modification adds a hydrophilic "PEG chain" to the lipid, which improves solubility, stability, and biocompatibility. PEGylated lipids are commonly used in drug delivery systems, liposomes, and nanoparticles to enhance circulation time and reduce immune system recognition.
What is the function of the PEG lipid?
The main function of a PEG lipid is to create a hydrophilic "stealth" layer around liposomes or nanoparticles. This reduces protein adsorption and recognition by the immune system, prolonging circulation time in the bloodstream. PEG lipids also improve particle stability, enhance bioavailability of the encapsulated drug, and can facilitate targeted delivery when combined with specific ligands.
How to PEGylate a liposome?
To PEGylate a liposome, PEGylated lipids are incorporated into the liposome bilayer during liposome formation. Methods include:
- Thin-film hydration: Dissolve lipids and PEGylated lipids in organic solvent, form a thin lipid film, then hydrate to form PEGylated liposomes.
- Post-insertion: Preformed liposomes are incubated with PEG-lipid micelles, allowing PEG-lipids to insert into the bilayer.
The PEG density, chain length, and lipid composition are optimized to balance circulation time, stability, and drug release.
How do PEGylated lipids improve drug delivery?
PEGylated lipids form a hydrophilic shield around nanoparticles or liposomes, reducing protein adsorption and immune recognition. This "stealth" property prolongs circulation time in the bloodstream, enhances bioavailability, and allows for more efficient accumulation at target tissues. They are particularly useful for delivering sensitive drugs, nucleic acids, or therapeutic proteins with reduced clearance.
What types of PEGylated lipids are commonly used?
Common PEGylated lipids include DSPE-PEG, DPPE-PEG, and cholesterol-PEG derivatives. These differ in lipid tail composition and PEG chain length, affecting nanoparticle stability, flexibility, and circulation time. Selection depends on the delivery system and therapeutic application. Tailoring PEG density and molecular weight enables precise control of pharmacokinetics and cellular uptake efficiency.
Are PEGylated lipids biocompatible and safe?
PEGylated lipids are generally biocompatible and widely used in pharmaceutical formulations. PEG is non-toxic and non-immunogenic in most cases, while lipid components resemble natural biological membranes. However, repeated high doses may trigger immune responses in rare cases. Proper formulation and dosing minimize potential adverse effects, making them safe for in vivo applications.
How are PEGylated lipids synthesized?
PEGylated lipids are synthesized by covalently attaching PEG chains to functional groups on lipids, such as amines, carboxyls, or thiols. Methods include carbodiimide-mediated coupling, click chemistry, or maleimide-thiol reactions. Reaction conditions are optimized to control PEG length, lipid solubility, and purity, ensuring stable and reproducible conjugates suitable for pharmaceutical or research applications.
What are PEGylated lipid nanoparticles?
PEGylated lipid nanoparticles (PLNs) are nanoscale lipid-based carriers modified with polyethylene glycol (PEG). PEG chains provide a hydrophilic surface, improving stability, circulation time, and biocompatibility. These nanoparticles are widely used for delivering drugs, nucleic acids, or vaccines, enhancing bioavailability while reducing immune clearance and non-specific interactions in vivo.
What are PEGylated solid lipid nanoparticles?
PEGylated solid lipid nanoparticles (SLNs) are a type of lipid nanoparticle with a solid lipid core stabilized by surfactants and PEG chains. PEGylation enhances stability, prolongs circulation, and reduces aggregation. SLNs are used for controlled drug release, improved bioavailability, and targeted delivery of poorly soluble drugs, proteins, or peptides in pharmaceutical and biomedical applications.

Case Studies and Success Stories

Background

A biotechnology startup based in Zurich, Switzerland, focuses on developing novel chemotherapeutic drugs and their delivery systems. The company faced challenges with existing liposomal drug carriers, including short circulation times and high nonspecific uptake, which limited drug efficacy. To improve drug stability and targeted delivery, they aimed to optimize carrier performance using PEGylated liposomes.

What Does BOC Sciences Do?

BOC Sciences designed and synthesized PEGylated DSPE (1,2-Distearoyl-sn-glycero-3-phosphoethanolamine) lipids for the client, selecting the appropriate PEG chain length and optimizing PEG density to achieve long-circulation liposomes. PEGylated liposomal drug carriers were prepared using thin-film hydration and post-insertion methods, followed by physicochemical characterization (particle size, zeta potential, encapsulation efficiency) and in vitro stability assessment to ensure the carriers met R&D requirements.

Key Outcomes

Successfully prepared PEGylated liposomes with uniform particle size (~120 nm), stable zeta potential, and drug encapsulation efficiency exceeding 90%.
PEG modification significantly extended liposome circulation time in blood, increasing drug accumulation in tumor tissues.
Liposomes demonstrated excellent in vitro stability, reducing nonspecific uptake and drug degradation risk, providing a reliable foundation for subsequent in vivo studies and preclinical research.

Background

A biotechnology company based in Munich, Germany, specializes in siRNA therapeutic development. siRNA molecules are prone to enzymatic degradation in plasma and rapid clearance, reducing therapeutic efficacy. The client aimed to use PEGylated solid lipid nanoparticles (PEGylated SLNs) to enhance in vivo stability and delivery efficiency for targeted intracellular transport.

What Does BOC Sciences Do?

BOC Sciences customized PEGylated solid lipid nanoparticles for the client, selecting suitable solid lipid cores and PEG modification strategies, and optimizing PEG chain length and surface density to ensure particle stability and efficient cellular uptake. Nanoparticles were prepared using high-pressure homogenization, with analyses of particle size distribution, surface charge, and siRNA encapsulation efficiency. Formulation optimization advice was also provided to support in vivo applications.

Key Outcomes

Successfully prepared PEGylated SLNs with particle size ~150 nm, neutral surface charge, and siRNA encapsulation efficiency above 92%.
PEG modification improved nanoparticle stability in blood circulation, significantly reducing immune clearance.
Nanoparticles demonstrated efficient siRNA delivery in in vitro cell studies, supporting subsequent in vivo research and clinical development plans.

Publications

This section showcases the academic achievements of international research teams using BOC Sciences' products and services, highlighting our industry impact in lipid and PEG supply and development.

Osteogenic effects of rapamycin on bone marrow mesenchymal stem cells via inducing autophagy. Journal of Orthopaedic Surgery and Research 18.1 (2023): 129. PMID: 36814286 DOI: 10.1186/s13018-023-03616-9.
Baricitinib Liposomes as a New Approach for the Treatment of Sjögren's Syndrome. Pharmaceutics. 2022; 14(9): 1895. DOI: 10.3390/pharmaceutics14091895.
The long-chain monounsaturated cetoleic acid improves the efficiency of the n-3 fatty acid metabolic pathway in Atlantic salmon and human HepG2 cells. Br J Nutr. 2019; 122(7): 755-768. DOI: 10.1017/S0007114519001478.
Liquid chromatography–tandem mass spectrometry method for the analysis of N-(3-aminopropyl)-N-dodecylpropane-1, 3-diamine, a biocidal disinfectant, in dairy products. Food chemistry 262 (2018): 168-177. DOI: 10.1016/j.foodchem.2018.04.080.
Effect of long-term dietary sphingomyelin supplementation on atherosclerosis in mice. PloS one 12.12 (2017): e0189523. PMID: 29240800 DOI: 10.1371/journal.pone.0189523.

More Publications

Client Testimonials

Industry Distribution of Custom Lipid Synthesis Clients

"BOC Sciences provided exceptional support for our PEGylated lipid project. Their team guided us through custom synthesis and ensured high-purity material suitable for in vivo studies. Delivery was on time, and technical support was highly professional."
— Dr. Emily Carter, Research Scientist (USA)
"We needed PEGylated lipid nanoparticles with precise PEG chain lengths for our drug delivery research. BOC Sciences not only met our specifications but also offered valuable formulation advice. Their expertise made a real difference in our preclinical development."
— Mr. Thomas Müller, Formulation Chemist (Germany)

"We needed DPPE-PEG nanoparticles with precise PEG chain lengths for our targeted drug delivery research. BOC Sciences not only met our specifications but also offered valuable formulation advice. Their expertise significantly accelerated our preclinical studies."
— Mr. Thomas Müller, Formulation Chemist (Germany)
"BOC Sciences provided tailored solutions and technical guidance. The materials were high quality, and the project timeline was fully met. They are a reliable partner for advanced lipid chemistry projects."
— Mr. Lucas Martin, R&D Chemist (France)

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