人食管上皮细胞Cell Specification
The human esophagus is lined by a non-keratinizing, stratified squamous epithelium whose
apical cell membranes and intercellular junctional complexes form a barrier against the influx of
luminal content [1]. The barrier helps to reduce exposure of surface cells to changes in
osmolality, which occurs frequently within the esophageal lumen [2]. Histologically, the
esophageal epithelium consists of two zones, the basal and differentiated zones. Cellular
proliferation is limited to the basal zone, and the cells are thought to migrate from this area
towards the esophageal lumen. Migration is associated with the initiation of differentiation and
the sequential expression of differentiation markers [3]. Human esophageal epithelial cell culture
is an excellent in vitro model to study esophageal epithelium physiology and the mechanisms of
esophageal carcinogenesis.
HEEPIC from ScienCell Research Laboratories are isolated from the human esophagus. HEEPIC
are cryopreserved at passage one and delivered frozen. Each vial contains >5 x 105
cells in 1 ml
volume. HEEPIC are characterized by immunofluorescence with antibodies specific to
cytokeratine-8, -18 and -19. HEEPIC are negative for HIV-1, HBV, HCV, mycoplasma, bacteria,
yeast and fungi. HEEPIC are guaranteed to further expand for 10 population doublings under the
conditions provided by ScienCell Research Laboratories.
Recommended Medium
人食管上皮细胞It is recommended to use Epithelial Cell Medium-2 (EpiCM-2, Cat. #4121) for culturing
HEEPIC in vitro.
Product Use
HEEPIC are for research use only. They are not approved for human or animal use, or for application
in in vitro diagnostic procedures.
Storage
Upon receiving, directly and immediately transfer the cells from dry ice to liquid nitrogen and
keep the cells in liquid nitrogen until they are needed for experiments.
Shipping
Dry ice.
References
[1] Orlando RC. (2000) “Gastroesophageal Reflux Disease: Offensive Factors and Tissue Resistance.” New York:
Dekker.
[2] Orlando GS, Tobey NA, Wang P, Abdulnour-Nakhoul S, Orlando RC. (2002) “Regulatory volume decrease in
human esophageal epithelial cells.” Am J Physiol Gastrointest Liver Physiol 283: G932-G937.
[3] Jankowski J, Hopwood D, Dover R, Wormsley KG. (1993) “Development and growth of normal, metaplastic
and dysplastic oesophageal mucosa: biological markers of neoplasia.” Eur. J. Gastroenterol. Hepatol. 5:235-246.
Instructions for culturing cells
Caution: Cryopreserved cells are very delicate. Thaw the vial in a 37oC water bath
and return the cells to culture as quickly as possible with minimal handling!
Initiating the culture:
1. Prepare a poly-L-lysine-coated culture vessel (2 μg/cm2
, T-75 flask is recommended).
Add 10 ml of sterile water to a T-75 flask and then add 15 μl of poly-L-lysine stock
solution (10 mg/ml, Cat. #0413). Leave the vessel in a 37oC incubator overnight (or for a
minimum of one hour).
2. Prepare complete medium. Decontaminate the external surfaces of medium bottle and
medium supplement tubes with 70% ethanol and transfer them to a sterile field.
Aseptically transfer supplement to the basal medium with a pipette. Rinse the supplement
tube with medium to recover the entire volume.
3. Rinse the poly-L-lysine-coated vessel twice with sterile water and then add 15 ml of
complete medium. Leave the vessel in the sterile field and proceed to thaw the
cryopreserved cells.
4. Place the frozen vial in a 37oC water bath. Hold and rotate the vial gently until the
contents completely thaw. Promptly remove the vial from the water bath, wipe it down
with 70% ethanol, and transfer it to the sterile field.
5. Carefully remove the cap without touching the interior threads. Gently resuspend and
dispense the contents of the vial into the equilibrated, poly-L-lysine-coated culture vessel.
A seeding density of 5,000 cells/cm2
is recommended.
Note: Dilution and centrifugation of cells after thawing are not recommended since these
actions are more harmful to the cells than the effect of residual DMSO in the culture. It is
also important that cells are plated in poly lysine coated culture vessels to promote cell
attachment.
6. Replace the cap or lid of the culture vessel and gently rock the vessel to distribute the
cells evenly. Loosen cap, if necessary, to allow gas exchange.
7. Return the culture vessel to the incubator.
8. For best results, do not disturb the culture for at least 16 hours after the culture has been
initiated. Refresh culture medium the next day to remove residual DMSO and unattached
cells, then every other day thereafter.
Maintaining the culture:
人食管上皮细胞1. Refresh supplemented culture medium the next morning after establishing a culture from
cryopreserved cells.
2. Change the medium every three days thereafter, until the culture is approximately 70%
confluent.
3. Once the culture reaches 70% confluency, change medium every other day until the
culture is approximately 90% confluent.
Subculturing:
1. Subculture when the culture reaches 90% confluency or above.
2. Prepare poly-L-lysine-coated culture vessels (2 μg/cm2
) one day before subculture.
3. Warm complete medium, trypsin/EDTA solution (T/E, Cat. #0103), T/E neutralization
solution (TNS, Cat. #0113), and DPBS (Ca++
- and Mg++
-free, Cat. #0303) to room
temperature. We do not recommend warming reagents and medium in a 37oC water bath
prior to use.
4. Rinse the cells with DPBS.
5. Add 8 ml of DPBS and then 2 ml of T/E solution into flask (in the case of a T-75 flask).
Gently rock the flask to ensure complete coverage of cells by T/E solution. Incubate the
flask in a 37oC incubator for 1 to 2 minutes or until cells completely round up. Use a
microscope to monitor the change in cell morphology.
6. During incubation, prepare a 50 ml conical centrifuge tube with 5 ml of fetal bovine
serum (FBS, Cat. #0500).
7. Transfer T/E solution from the flask to the 50 ml centrifuge tube (a small percent of cells
may detach) and continue to incubate the flask at 37oC for another 1 to 2 minutes (no
solution in the flask at this moment).
8. At the end of incubation, gently tap the side of the flask to dislodge cells from the
surface. Check under a microscope to make sure that all cells detach.
9. Add 5 ml of TNS solution to the flask and transfer detached cells to the 50 ml centrifuge
tube. Rinse the flask with another 5 ml of TNS to collect the residual cells.
10. Examine the flask under a microscope for a successful cell harvest by looking at the
number of cells being left behind; there should be less than 5%.
Note: Use ScienCell T/E solution that is optimized to minimize cell damages due to over
trypsinization.
11. Centrifuge the 50 ml centrifuge tube at 1000 rpm for 5 minutes. Resuspend cells in
culture medium.
人食管上皮细胞12. Count and plate cells in a new poly-L-lysine-coated culture vessel with the recommended
cell density.
Caution: Handling human derived products is potentially biohazardous. Although each cell
strain tests negative for HIV, HBV and HCV DNA, diagnostic tests are not necessarily 100%
accurate, therefore, proper precautions must be taken to avoid inadvertent exposure. Always
wear gloves and safety glasses when working with these materials. Never mouth pipette. We
recommend following the universal procedures for handling products of human origin as the
minimum precaution against contamination [1].
[1] Grizzle WE, Polt S. (1988) “Guidelines to avoid personal contamination by infective agents in research
laboratories that use human tissues.” J Tissue Cult Methods. 11: 191-9.