KC-4245

A549-ROCK1-KO-1A2-Cell-Line

44034

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Background of A549-ROCK1-KO-1A2-Cell-Line

Rho family proteins are small G proteins with GTPases, which are widely presented in eukaryotic tissues. RhoA (Ras homologous gene family member A) is one of the most critical Rho family members. RhoA serves as a molecular switch that cyclically regulates intracellular signalling between an inactive GDP binding conformation and an active GTP binding conformation. Rho‐kinase 1 (Rho‐related coiled‐coil containing protein kinase, ROCK1) is the direct downstream and primary effector substrate of RhoA. Phosphorylation of myosin phosphatase targeting subunit 1 (MYPT1), one of the important physiological substrates of ROCK1, facilitates interaction and phosphorylation of the catalytic domain of ROCK1. The RhoA/ROCK signal mediates the process of cardiovascular diseases by regulating biological processes such as inflammation, differentiation and apoptosis. In addition, some research suggested the RhoA/ROCK1 pathway regulates mitochondrial fragmentation through Drp1, a large GTPase, which is activated and transported to the surface of mitochondria to regulate mitochondrial fission. Shen et al. found that RhoA/ROCK1 pathway was engaged in phosphorylated Drp1 at the 616th Serine in cardiomyocytes pretreated with TNF‐α, which promoted mitochondrial fragmentation. Another report showed that in LPS‐pretreated mice, ROCK1 inhibitor could improve mitochondrial function by restricting excessive mitochondrial fission through inhibiting Drp1(Ser616) phosphorylation.

Specifications

Catalog Number	KC-4245
Cell Line Name	A549-ROCK1-KO-1A2-Cell-Line
Host Cell Line	A549
Description	Stable A549 cell line with human ROCK1 gene knockout, No.1A2
Quantity	Two vials of frozen cells (≥2-10⁶/vial)
Stability	Stable in culture over a minimum of 10 passages
Application	Drug screening and biological assays
Freezing Medium	70% McCoy's 5a + 20% FBS + 10% DMSO
Propagation Medium	McCoy's 5a + 10% FBS
Selection Marker	N/A
Morphology	Fibroblastoid cells growing as a monolayer
Subculture	Split the saturated culture at a ratio of 1:3~1:6 every 2~3 days; seed out at about 1-3 x 10⁵ cells/ml
Incubation	37 °C with 5% CO₂
Storage	Liquid nitrogen immediately upon receiving
Doubling Time	Approximately 30 hours
Mycoplasma Status	Negative
In Vivo Validation	NA

Cell Line Generation

A549-ROCK1-KO 1A2 cell line was generated using the CRISPR method.

Characterization

Figure 1: Characterization of A549-ROCK1-KO 1A2 cell line stable clone using PCR sequencing.

Figure 2: Characterization of A549-ROCK1-KO 1A2 cell line stable clone using RT-PCR sequencing.

Figure 3: Characterization of A549-ROCK1-KO 1A2 cell line stable clone using western blot.

Cell Resuscitation

Prewarm culture medium (McCoy's 5a + 10% FBS)in a 37°C water bath.
Thaw the frozen vial in a 37°C water bath for 1-2 minutes.
Transfer the vial into biosafety cabinet, and wipe the surface with 70% ethanol.
Unscrew the top of the vial and transfer the cell suspension gently into a sterile centrifuge tube containing 9.0mL complete culture medium.
Spin at ~ 125 × g for 5-7 minutes at room temperature, and discard the supernatant without disturbing the pellet.
Resuspend cell pellet with the appropriate volume of complete medium and transfer the cell suspension into a T25 culture flask.
Incubate the flask at 37°C, 5% CO₂ incubator.
Split the saturated culture at a ratio of 1:3 ~ 1:6 every 2~3 days; seed out at about 1-3 x 10⁵ cells/mL.

Cell Freezing

Prepare the freezing medium (70% McCoy's 5a + 20% FBS + 10% DMSO) fresh immediately before use.
Keep the freezing medium on ice and label cryovials.
Transfer cells to a sterile, conical centrifuge tube, and count the cells.
Centrifuge the cells at 250×g for 5 minutes at room temperature and carefully aspirate off the medium.
Resuspend the cells at a density of at least 3×10⁶ cells/mL in chilled freezing medium.
Aliquot 1 mL of the cell suspension into each cryovial.
Freeze cells in the CoolCell freezing container overnight in a -80°C freezer.
Transfer vials to liquid nitrogen for long-term storage.

References

Dong Q, Luo Y, Yin Y, Ma Y, Yu Y, Wang L, Yang H, Pan Y, Zhang D. RhoA/ROCK1 regulates the mitochondrial dysfunction through Drp1 induced by Porphyromonas gingivalis in endothelial cells. J Cell Mol Med. 2023 Aug;27(15):2123-2135. doi: 10.1111/jcmm.17796. Epub 2023 Jun 6. PMID: 37278388; PMCID: PMC10399523.