Immortalized Human Peripheral Blood CD4+ Helper T Cell Line - SV40

Cat. No.

T0417

Unit

1x10⁶ cells / 1.0 ml

Price

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Cat. No.	T0417
Name	Immortalized Human Peripheral Blood CD4+ Helper T Cell Line - SV40
Description	This cell line is derived from human peripheral blood CD4+ helper T cells, which are crucial for orchestrating immune responses. Cells were immortalized via the introduction of the SV40 (Simian Virus 40) large T antigen. This modification allows for extensive experimental manipulation and long-term studies on CD4+ T cell functions and mechanisms. Researchers can utilize this cell line to investigate various aspects of immune regulation, including T cell activation, cytokine production, and interactions with other immune cells, providing valuable insights into immune system diseases and potential therapeutic targets.
Organism	Human (H. sapiens)
Tissue	Blood (Immune)
Donor History	Male, 28, Caucasian
Growth Properties	Suspension, Round
Unit	1x10⁶ cells / 1.0 ml
Storage Condition	Vapor phase of liquid nitrogen, or below -130°C.
Shipping Conditions	Ship with dry ice.
Product Format	Frozen
Intended Use	This product is intended for laboratory research use only. It is not intended for any animal or human therapeutic use, any human or animal consumption, or any diagnostic use.
BioSafety	II
Certificate of Analysis	For batch-specific test results, refer to the applicable certificate of analysis that can be found at www.abmgood.com.
Growth Conditions	PriCoat™ T25 Flasks (G299) are recommended for optimal cell culture. The optimal media formulations and growth conditions are detailed below. Thawing Medium: PrimGrow T Xpan™ Basal Medium (TM182-B) + 10% FBS + 10 µl ROCK Inhibitor Y-27632 (TM131) + 1% Penicillin/Streptomycin Solution (G255). Activation Medium: PrimGrow T Xpan™ Basal Medium (TM182-B) with T Xpan™ Cell Activator (CD3/CD28/CD2) (TM139) at 2 µl per 1 ml of basal medium. Maintenance/Expansion Medium: PrimGrow T Xpan™ Medium Kit (TM182) + 1% Penicillin/Streptomycin Solution (G255). Incubate cells at 37.0°C, 5% CO₂. Note: Cells must be activated immediately after thawing before use in downstream applications.
Unpacking and Storage Instructions	1. Visually examine the packaging containers for signs of leakage or breakage. 2. Immediately transfer frozen cells from dry ice packaging to a temperature below -130°C, preferably in liquid nitrogen vapor phase storage, until ready for use. To ensure the highest level of viability, thaw the vial and initiate culture as soon as possible upon receipt. If continued storage is desired, the vial should only be stored below -130°C or in liquid nitrogen vapor phase. Do not store at -70°C, as it will result in loss of viability.
Thawing Protocol	1. Thaw cells quickly in a 37°C water bath while agitating gently (maximum 2 minutes). The vial cap should be kept above the water level to minimize the risk of contamination. 2. Decontaminate the vial by spraying and wiping the exterior of the vial with 70% ethanol. From this point onwards, all operations should be strictly carried out inside a biological safety cabinet using aseptic conditions. 3. Transfer the cell suspension into a 15ml sterile conical tube containing 10ml of pre-warmed Thawing Medium. Centrifuge cells at 125 xg for 5-7 minutes. 4. Carefully aspirate the supernatant, leaving a thin layer of medium above the pellet. Resuspend the cell pellet in Activation Medium and transfer the entire volume into a PriCoat™ T25 flask (G299). Example: 5 ml basal media + 10 µl T Xpan™ Cell Activator. 5. Incubate the cells for 24 hours. 6. Check for cluster formation, typically visible between 24–48 hours. Once clusters are present, activated cells are suitable for downstream applications. 7. After confirming activation, replace the activation medium with Maintenance/Expansion Medium. Do not allow cell density to exceed 3 × 10⁶ cells/ml. Subculture accordingly. 8. For ongoing expansion, re-stimulate cultures every 7–14 days using 2 µl of T Xpan™ Cell Activator (TM139) per 1 ml of cell suspension.
Subculture Protocol	Do not allow cell density to exceed exceeds 3 × 10⁶ cells/ml, subculture cells as per the instructions below. Confluent cultures may be transferred to T25 or T75 culture flasks which can be split to additional flasks. 1. Simply add fresh complete media directly to the culture flask. or, 2. Remove half of the cell suspension and transfer to a new culture vessel; add additional fresh complete media to both culture vessels. 3. Incubate the cells at the recommended conditions. 4. Continue to monitor cell growth (cell clumps should continue to grow and become visible in the culture flask). Add fresh complete growth media every 3 days. 5. Rapid proliferation typically continues for up to 14 days, during which cells should be passaged every 1–2 days. Afterward, they return to a more stable growth phase. 6. If additional expansion is needed after day 14, a second activation (repeat the 24-well setup) may be performed only when cells are healthy. However, avoid repeated stimulations — *more than 3–5 rounds can induce T cell exhaustion. Note: Do not centrifuge cells during subculture procedures.*
Cryopreservation	We recommend using serum-free CryoGuard™ Freezing Media (TM078).
Immortalization Method	Serial passaging and retroviral transduction with retroviruses carrying the SV40 gene.
Expression	CD4+ (via FACS)
Warranty	abm warrants that cell lines shall be viable upon initiation of culture for a period of thirty (30) days after shipment and that they shall meet the specifications on the applicable abm Material Product Information sheet, certificate of analysis, and/or catalog description. Such thirty (30) day period is referred to herein as the "Warranty Period”.
Disclaimer	1. Sale of this item is subjected to the completion of a Material Transfer Agreement (MTA) by the purchasing individual/institution for each order. If you have any questions regarding this, please contact us at licensing@abmgood.com. 2. All test parameters provided in the CoA are conducted using abm's standardized culture system and procedures. The stated values may vary under the end-user's culture conditions. Please verify that the product is suitable for your studies by referencing published papers or ordering RNA (0.5 μg, Cat.# C207, $450.00) or cell lysate (100 μg, Cat.# C206, $600.00) to perform preliminary experiments, or alternatively use our Gene Expression Assay Service (Cat# C138). All sales are final. 3. We recommend live cell shipments for ease of cell transfer and this option can be requested at the time of ordering. Please note that the end-user will need to evaluate the feasibility of live cell shipment by taking into account the final destination's temperature variation and its geographical location. In addition, we thoroughly test our cell lines for freeze-thaw recovery. If frozen cells were received and not recovered in your lab under the exact, specified conditions (using recommended culture vessel, media, additional supplements, and atmospheric conditions), a live cell replacement is possible at a cost (plus shipping). 4. All of abm's cell biology products are for research use ONLY and NOT for therapeutic/diagnostic applications. abm is not liable for any repercussions arising from the use of its cell biology product(s) in therapeutic/diagnostic application(s). Please contact a technical service representative for more information. 5. abm makes no warranties or representations as to the accuracy of the information on this site. Citations from literature and provided for informational purposes only. abm does not warrant that such information has been shown to be accurate. 6. abm warrants that cell lines shall be viable upon initiation of culture for a period of thirty (30) days after shipment and that they shall meet the specifications on the applicable abm Material Product Information sheet, certificate of analysis, and/or catalog description. Such thirty (30) day period is referred to herein as the "Warranty Period."
Application	Research Use Only.
Material Citation	If use of this material results in a scientific publication, please cite the material in the following manner: Applied Biological Materials Inc, Cat. No. T0417

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Supporting Protocol

Other

	How should I handle live cells once I receive them?
	Please refer to our Cell Handling and Thawing Guidelines for detailed instructions on receiving, thawing, and culturing live cells: https://www.abmgood.com/immortalized-cells-documents.html Following these guidelines will help ensure optimal cell viability and performance.

	I want to make sure these cells express my gene of interest before I decide to buy the cell line. Can you provide a sample so this can be tested?
	We do not perform extensive downstream characterization, or gene expression profiling of our cell lines. However, you can check the ‘References’ tab to see if a publication is available, or you can contact us to see if RNA or cell lysates are available for your cell line of interest. Please directly contact us for further information at quotes@abmgood.com.

	Does abm's PriGrow series medium contain antibiotics?
	No, the medium does not contain antibiotics and needs to be supplemented by the end-user as desired.

	Do I need to use abm's media and Applied Cell Extracellular Matrix (G422) to culture my cells?
	We strongly encourage using the recommended media and culture conditions described in the "Growth Conditions" section as they have been optimized for cell growth. Other supplier's media and coating conditions have not been tested.

	What is the difference between Applied Cell Extracellular Matrix (G422) and Collagen Coating?
	The main component of our Applied Cell Extracellular Matrix (G422) is type I collagen specifically. For more information on abm's Applied Cell Extracellular Matrix please visit: http://www.abmgood.com/Applied-Cell-Extracellular-Matrix-G422.html.

	Do I have to use T25 ECM-coated flasks for growing the cells?
	We strongly recommend thawing cells in the T25 flasks specified on the cell-specific product page to ensure optimal post-thaw recovery of the frozen cells before testing other culture vessels.

	If I want to plate these cells to multi-well plates (e.g. 96 well plates) or dishes, how should I prepare the plates?
	For a protocol on how to coat plates and dishes with Applied Cell Extracellular Matrix (Cat. No. G422), please download the “Applied Cell Extracellular Matrix Data Sheet” from here.

	What percentage of Trypsin-EDTA should be used to subculture cells? Can I use Trypsin-EDTA containing phenol red?
	The standard concentration used for subculturing is 0.25% Trypsin-EDTA, available at abm (Cat. No. TM050). Yes, Trypsin-EDTA containing phenol red can be used as it does not interfere with trypsinization.

	How often do I need to change the media?
	Media should be changed every 2-3 days or as specified within the recommended growth conditions.

Why are these cells classified as biosafety level II?

We follow the CDC-NIH recommendations that all mammalian sourced products should be handled at the Biological Safety Level 2 to minimize exposure of potentially infectious products. This information can be found in 'Biosafety in Microbiological and Biomedical Laboratories' (1999). Your institution's Safety Officer or Technical Services will be able to make the call as to whether BioSafety Level I is possible with these cells at your site, if desired.

	How long can I store frozen vials?
	Cells that are properly frozen using an effective cryoprotective agent can be stored in liquid nitrogen vapor phase (or below -130°C) indefinitely without affecting viability.

What is the recommended storage temperature for cells?

In general, if you received:

Live cells: acclimatize for 3-5 hours at the recommended temperature and CO2 conditions stated for the cell line under the Growth Conditions section, and then change media afterwards. For more information on how to handle live cells, please view our detailed instructions here (https://www.abmgood.com/uploads/document/Cell_Handling_Instructions_Upon_Arrival_150623.pdf).
Frozen cells: Upon receipt, immediately place cells in liquid nitrogen; or below -130°C.

	Can I substitute heat-inactivated FBS with FBS or vice versa?
	FBS and heat-inactivated FBS are different in their composition; they cannot be substituted for one another.

My cells are not detaching, what method do you recommend to trypsinize the cells?

Gently wash adherent cells with PBS (1X, without calcium or magnesium) to remove trypsin inhibitors before adding the trypsinization agent.
Ensure the correct trypsin concentration is being used (i.e. 0.25%).
Do not use cold trypsin to detach cells as the proteolytic activity will be low. Pre-warm trypsin to 37°C for optimal enzymatic activity.
Incubate the cells with trypsin-edta agent at 37°C to facilitate cell detachment.
Gently tap the side of the culture vessel to facilitate mechanical detachment.

How are live cells shipped?

Live cells are shipped as a live culture in a T12.5 flask. Cells are seeded at an optimal confluency to avoid metabolic waste build up during transport. In addition, we thoroughly test our cell lines for functional freeze-thaw recovery. For more information on how to handle live cells, please view our detailed instructions here (https://www.abmgood.com/uploads/document/Cell_Handling_Instructions_Upon_Arrival_150623.pdf).

	Why are cells not attaching and forming clumps after subculturing with trypsin?
	Cells form clumps and display attachment issues when the trypsinization agent is not effectively neutralized. To completely neutralize the trypsin agent, add an equal amount of complete growth media prior to centrifugation. Subtle changes in culture conditions, particularly in pH and the quality of serum used in the growth medium, may also affect the amount of clumping exhibited by the cells.

	Why are my cells forming clumps after plating?
	It is important to ensure cell clumps are broken up through gentle re-suspension by pipetting up and down several times after pelleting cells by centrifugation. This will ensure a homogenous single cell suspension for even plating.

	Do I need to add the selection drug to the complete growth medium?
	We recommend maintaining selection pressure using the drug concentration specified in the Growth Conditions section.

	Where can I find the CoA for my product?
	Certificates of analysis can be found here (https://www.abmgood.com/CoA-Library.html).

	What is your warranty or return policy?
	Our warranty and return policy is outlined in abm’s Terms and Conditions, including details on product quality, limitations, and claims. Please refer to the following link for full information: https://www.abmgood.com/terms For additional questions, our Order team is happy to assist and can be reached at order@abmgood.com.

How many times can cells divide?

The number of times cells can divide depends on the cell type:

Primary cells have a limited lifespan and will undergo a finite number of population doublings before entering senescence. The exact number varies by cell type and culture conditions.
Immortalized cell lines are capable of extended or indefinite proliferation under proper culture conditions, although growth characteristics may vary between lines.

What is the difference between spontaneous immortalization and tumor-derived cells?

Spontaneously immortalized cells arise when normal cells acquire the ability to proliferate indefinitely in culture without intentional genetic manipulation. These cells are not derived from tumors but may undergo genetic or phenotypic changes during immortalization.

Tumor-derived cells are established directly from cancerous tissue and typically retain characteristics associated with malignancy, such as altered growth control and genetic instability.

	Do I need Applied Cell Extracellular Matrix (G422) if I am using PriCoat™ flasks?
	Please refer to the Growth Conditions section of your specific product page. This section will indicate whether Applied Cell Extracellular Matrix (G422), PriCoat™ flasks, or both are recommended for optimal cell attachment and growth, as requirements may vary by cell type.