Immortalized Sweat Gland Myoepithelial Cell Line (iEM)
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Sale of this item is subjected to the completion of a Material Transfer Agreement (MTA) by the purchasing institution.
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| Cat. No. | T0816 |
| Name | Immortalized Sweat Gland Myoepithelial Cell Line (iEM) |
| Description |
This novel, immortalized ecrine sweat gland myoepithelial cell line (iEM) serves as a model for research on sweat glands and sweating. These cells were developed from primary cells transduced with lentiviral vectors containing hTERT and SV40T. Cells display spheroid formation with increased population doubling compard to non-transduced cells. iEM's express myoepithelial cell-specific proteins (a-SMA, B1 or K14) and can differentiate into luminal cells. Immortalized Sweat Gland Myoepithelial Cells provide a useful in vitro model for recapitulating eccrine sweat gland functions and for screening substances that can modulate sweating by acting on sweat glands. These cells are applicable for studies in hyperhidrosis, adiaphoresis, and sweat gland diseases. Please note: cells are exected to grow to 65 population doublings (PDs), however, the exact PD limit can vary by lot. |
| Organism | Human (H. sapiens) |
| Tissue | Sweat Gland |
| Donor History | Female, 53, Eyelid |
| Growth Properties | Suspension, round spheroid |
| Cell Type | Immortalized Cells |
| 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 |
Ultra-Low Attachment Plates or upright culture flasks are required for cell growth; cells must remain in suspension in order to form spheroids. Mammocult Human Medium Kit (Stemcell Technologies, Cat. 05620) + 10 ng/ml EGF (Z100139) + 10 ng/ml bFGF (Z101456) + 4 µg/ml heparin + 0.5 µg/ml hydrocortisone 21-hemisuccinate + 2% (v/v) growth factor reduced matrigel (optional) + 1% Penicillin/Streptomycin Solution (G255), 37.0°C, 5% CO₂. Note: thawed cells should be re-suspended in media supplemented with serum to neutralize DMSO. Cells take additional time to recover post-thaw and display cell death during the initial recovery phase. Grow cells in ultra-low attachemnt plates OR upright flask to allow spheroids to form. Subculture every 7 days and at least twice before experimental use. Seeding density: 2500 cells/well. |
| 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 5ml of pre-warmed, complete growth media supplemented with 10% FBS. Centrifuge cells at 300xg for 5 minutes. 4. Aspirate the supernatant without disturbing the cell pellet. Re-suspend the cell pellet in the recommended pre-warmed, complete growth media and dispense into a T25 culture flask. 5. Incubate the cells at the recommended conditions. |
| Subculture Protocol |
1. Simply add fresh complete media directly to the culture. Do not allow cell density to exceed 1x10⁶ cells/ml. 2. Alternatively, replace complete growth media by centrifugation and re-suspend the cell pellet in fresh complete media, and add appropriate aliquots of the cell suspension to new culture vessels, as desired. 3. Incubate the cells at the recommended conditions. |
| Cryopreservation |
Cryopreservation Medium (TM024), or complete growth media with 10% DMSO. |
| Population Doubling Time (h) | 24 - 46 |
| Immortalization Method |
Immortalized with lentiviral vector containing hTERT & SV40T |
| Expression |
Alpha-SMA, puromycin resistance |
| 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." |
| Depositor | Osaka University |
| 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. T0816 |
| 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? | |
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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.
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| Does abm's PriGrow series medium contain antibiotics? | |
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No, the medium does not contain antibiotics and needs to be supplemented by the end-user as desired.
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| Do I need to use abm's media and Applied Cell Extracellular Matrix (G422) to culture my cells? | |
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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.
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| What is the difference between Applied Cell Extracellular Matrix (G422) and Collagen Coating? | |
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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.
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| Do I have to use T25 ECM-coated flasks for growing the cells? | |
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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.
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| If I want to plate these cells to multi-well plates (e.g. 96 well plates) or dishes, how should I prepare the plates? | |
| What percentage of Trypsin-EDTA should be used to subculture cells? Can I use Trypsin-EDTA containing phenol red? | |
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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.
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| How often do I need to change the media? | |
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Media should be changed every 2-3 days or as specified within the recommended growth conditions.
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| Why are these cells classified as biosafety level II? | |
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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.
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| How long can I store frozen vials? | |
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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.
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| What is the recommended storage temperature for cells? | |
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In general, if you received:
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| Can I substitute heat-inactivated FBS with FBS or vice versa? | |
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FBS and heat-inactivated FBS are different in their composition; they cannot be substituted for one another.
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| My cells are not detaching, what method do you recommend to trypsinize the cells? | |
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| How are live cells shipped? | |
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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).
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| Why are cells not attaching and forming clumps after subculturing with trypsin? | |
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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.
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| Why are my cells forming clumps after plating? | |
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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.
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| Do I need to add the selection drug to the complete growth medium? | |
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We recommend maintaining selection pressure using the drug concentration specified in the Growth Conditions section.
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| Where can I find the CoA for my product? | |
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Certificates of analysis can be found here (https://www.abmgood.com/CoA-Library.html).
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Hayakawa, T., Fujita, F., Okada, F., & Sekiguchi, K. (2022). Establishment and characterization of immortalized sweat gland myoepithelial cells. Scientific reports, 12(1), 1-10.