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About Us

DendroTEK Biosciences developed from fundamental research into novel cell culture matrices to support long-term cell culture in Professor Tim Kennedy’s lab at the Montreal Neurological Institute of McGill University. With the team of Nathalie Marcal and Jean-Pierre Clement, DendroTEK Biosciences grew from an idea to reality. 
DendroTEK Biosciences provides enhanced highly-stable matrices that support long-term cell culture and facilitate biomedical science for everyone in the field. Our goal is to provide game-changing reagents that break the boundaries of what’s possible in cell culture.

 

Our Mission: To provide innovative, high-quality, robust substrates to enhance cell culture.

Our Vision: To be the premier choice for cell culture matrices.

Protocol

Protocol dPGA

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Precautions and Disclaimer
This product is for R&D use only, not for drug, household, or other uses.

Storage/Stability
dPGA is highly stable and can be stored long-term at 4 °C.

Stock Preparation
Under sterile conditions, dilute dPGA to a 1 mg/ml stock solution with sterile ddH20. A sterile 1
mg/ml stock solution can be stored at 4 °C long term (up to 2 years).

Dendrimer Coating Protocol
Cell culture:
When using dPGA as a coating to promote cell-substrate attachment, the optimal conditions
should be determined for each cell line and application.
1. Under sterile conditions, dilute the 1 mg/ml dPGA stock solution to a final concentration
of 50 μg/ml (1:20 dilution) in sterile 1XPBS. The final concentration of the coating solution
may vary from 10-100 μg/ml. We recommend using a concentration of dPGA that is the
same as the concentration of poly-lysine in similar protocols.
2. Add the dPGA coating solution to your culture vessel and incubate for at least 1 hr at 37°C
(we recommend placing them in the CO2 incubator for incubation).
3. Following coating, remove the solution by aspiration and wash 3x with sterile 1XPBS.
4. After the last wash, seed the cells or coat with a second layer of Laminin or Matrigel (see
Step 5 below). Note: Leave the dPGA coated plates in 1XPBS until use.

Second layer coating with Laminin or Matrigel
5. After step 3 (above), the dPGA coated substrate may be coated with laminin or Matrigel.
For example: 20 μg/mL laminin solution or Matrigel in DMEM/F-12. Incubate the plates
for 1-2 h at 37 °C or overnight at 4 °C.

Shipping

Where do you ship from?

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DendroTEK Biosciences is a Canadian company. All our products are shipped from our headquarters in Montreal, Canada.

Where do you ship to?

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We ship to Canada, United States, Europe and Asia. If you don't see your country of destination for shipping, please email us at info@dendrotek.ca.

How long does it take before my order ships?

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Our orders are shipped as quickly as possible. Typically, we ship within 2-4 business days.

How much will shipping cost?

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Shipping costs depend on where you live and how fast you want your products delivered. After entering your shipping address in your shopping cart, all shipping options will be listed.

We ship using major and trusted couriers FedEx, UPS and Purolator

Do I have to pay customs?

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If you are located outside of Canada, you might have to pay import fees and taxes. They may be charged directly to you or through your organization's custom broker.

We are not liable for any fees or taxes your package may be subject to upon crossing the border so please review your country’s customs and duty policies. Because of the range of duty fees across different countries, we are unable to accurately predict these fees.

How are our products shipped and stored?

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Dendrimers are shipped at room temperature and are stable. When you'll receive them, we advise storing them at 4°C. They are stable up to 24 months.

How do I know my order confirmation?

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After placing your order at DendroTEK, you will receive an order confirmation email. If you don't receive an email confirmation please feel free to contact us at info@dendrotek.ca.

Can I track my order?

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Yes. All our products are shipped with a tracking number.

As soon as your order is ready to be shipped, you’ll receive a notification by email. It will contain a tracking number that will allow you to track your shipment and estimated delivery date through the carrier’s website.

Payment

Are all prices listed in Canadian Dollar (CAD)?

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Yes, all prices are displayed in CAD. Purchases made through our website will be charged in CAD, but will be automatically converted by your credit card company or institution ordering platform.

Accepted payment methods

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We accept payments made with Credit Card, Purchase Order (PO) and more.

Credit Card

We accept major credit cards such as American Express, Mastercard, Visa, Amex, Discover and more. During the online checkout process, you can enter your card details when prompted. 

Purchase Orders (PO)

When you order with a PO number, we will include this PO number on your invoice. This enables your organization's administration to confirm the invoice is valid.

If you wish to make a purchase with a PO#, sent us an email at info@dendrotek.ca with your order request (catalogue number, quantity, shipping address, billing address, phone number) and we'll send you a quote you can use with your organization ordering platform to generate your PO#.

PO numbers for DendroTEK Bioscience products may be submitted by email at: info@dendrotek.ca

Do you charge VAT?

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No, we don’t charge VAT.

Support

What is dPGA?

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dPGAs (dendritic polyglycerol amine) are a family of polymers with a highly branched dendritic structure composed of glycerol monomers with a portion of the glycerol hydroxyl end groups substituted with amine functional groups. dPGA presents a high density of positive charges at neutral pH, but unlike poly-lysine and poly-ornithine, does not contain peptide bonds and is therefore highly resistant to proteolysis.

What are the benefits of using dPGA?

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dPGA is a synthetic polymer. It is not a protein and therefore, in contrast to PLL,PDL, PLO, fibronectin and other protein base coating substrates, will not be degraded by protease overtime ensuring stability of the cell culture coated surface.

There’s a lot of issues raised from researchers around the globe about how difficult primary neuronal cultures can be. Some ask why are my primary neuronal cultures dying in culture? How can I keep them healthy, long term? Others observe clumps in neurosphere/aggregate-like days after seeding, what's wrong? 

While many factors should be taken into consideration when facing cell culture challenges, the surface treatment of your vessels is an important one.

Our data shows that dPGA coated surfaces can support long-term cultures of primary cortical neurons up to 3 months with a higher cell density, preservation of neuronal physiology characteristics and prevention of cell clumping/aggregates compared to PLL, PDL and PLO.

My primary neuronal cell cultures start out well dispersed but after around day 14, the cells start to aggregate and form clumps in neurosphere/aggregate-like and die. How can I prevent this from happening and keep my cells healthy, long term??

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Cells in culture secrete proteases that degrade polypeptide based substrates like poly-lysine and poly-ornithine. Over time, this results in a healthy culture degrading its own substrate. On a sub-optimal or degraded culture substrate, cells form clumps because they adhere better to each other than to the poor substrate. The dPGA polymer is not a protein and not degraded by proteases, resulting in massively enhanced stability as a cell culture substrate.

Do you have a good protocol for coating plates/dishes for primary neuronal culture (cortical, hippocampal)?

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Coating your vessels with dPGA for primary neuronal cultures is easy and comparable to standard PDL coating protocol.

Please refer to our protocol in the FAQ section or available as a PDF format on this page https://dendrotek.ca/products/dpga

dPGA can be stored at 4C long term. You can use it on glass or plasticware surfaces and culture plates can be coated in advance, dried and stored at 4C up to 3-4 days for later seeding of your cells.

If I switch from poly-lysine or poly-ornithine, do I need to recalibrate my technique for coating the cell culture substract?

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No. Using dPGA involves very simply replacing poly-lysine and poly-ornithine in your existing protocol for coating the cell culture substrate.

Can I pre-coat my plates with dPGA?

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Yes, You can pre-coat you plates with dPGA.

After the last PBS rinse, remove the rinse and add sterile 1X PBS. Wrap your cultureware in parafilm and store at 4C, wet, for up to 2 weeks. Make sure to preserve sterility of your vessels.

General Questions

Office Hours

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Our usual working hours are Monday-Friday 9am-5pm, EST.

Holiday Closures

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Our offices are closed on public holidays in Quebec, Canada. Holiday closures vary yearly as they are based on the Quebec statutory holiday calendar. Please click here for a list of holidays in Quebec.

More questions?

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Don't hesitate to contact our technical support at info@dendrotek.ca

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