LVPEIi005-A-1

LVIP02-LC2-2-BE1, SP-Epi-RPE65-BE1, Clone 10.1

The cell line is not validated yet.

General

iPSC Line

hPSCreg name LVPEIi005-A-1
Cite as:
LVPEIi005-A-1 (RRID:CVCL_E4X9)
Alternative name(s)
LVIP02-LC2-2-BE1, SP-Epi-RPE65-BE1, Clone 10.1
iPSC line type Human induced pluripotent stem cell (hiPSC)
Similar iPSC lines No similar lines found.
Last update 7th September 2026
Notes This patient specific induced pluripotent stem cell (iPSC) line is a sub-clone of the parental LCA2 patient-specific iPSC line (LVPEIi005-A), that has been gene edited to correct the pathogenic mutation, using the en31-FnCas9-ABE construct. The parental iPSC line carried a homozygous missense mutation in exon 9 of RPE65 (c.992G>A; p.Trp331Ter), which was then base edited and corrected as RPE65 (c.992A>G; p.Ter331Trp). This mutation corrected iPSC line has been stably expanded post-editing and genotyping and were characterized after passage 10. The line maintains a normal karyotype and expresses the stem cell markers OCT4, SOX2, NANOG, KLF4 and SSEA4. It also efficiently differentiates into all three germ cell lineages and formed retinal organoids and mature retinal pigmented epithelial (RPE) cells. The full length RPE65 protein expression is fully restored to normal levels in these mature iPSC-RPE cells.
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Provider

Generator L.V. Prasad Eye Institute (LVPEI)
Owner L.V. Prasad Eye Institute (LVPEI)
Distributors
Derivation country India

External iPSC Databases

Cellosaurus CVCL_E4X9
BioSamples SAMEA117748715

General iPSC Information

Publications
* Is the cell line readily obtainable for third parties?
Yes
Research use: allowed
Clinical use: not allowed
Commercial use: allowed
Additional restrictions:

Terms and conditions applied for commercial use

Subclone of

iPSC Genetic Modification

Disease/phenotype related modifications
The parental line (LVPEIi005-A) carried a homozygous, nonsense mutation in RPE65, Exon: 9, c.992 G>A, p.Trp331Ter (TGG>TAG). This is a mutation-corrected isogenic line reported in Acharya et al., 2024. In this gene-modified iPSC line (LVPEIi005-A-1), the point mutation in the parental line was corrected in both alleles using an en31FnCas9-based adenine base editor (Addgene Plasmid # 201956), and this has restored normal levels of full-length RPE65 protein expression in iPSC-derived RPE cells.
Synonyms
  • LCA2
  • amaurosis congenita of Leber II
Genetic modifications
RPE65 (target)
Isogenic modification
NM_000329.3, c.992 G>A, (TGG>TAG); Corrected to: c.992 A>G, (TAG>TGG)
NP_000320.1, p.Trp331Ter, p.W331* ; Corrected to: p.Ter331Trp, p.*331W
Homozygous
The parental line (LVPEIi005-A) carried a homozygous, nonsense mutation in RPE65, Exon: 9, c.992 G>A, p.Trp331Ter (TGG>TAG). This is a mutation-corrected isogenic line reported in Acharya et al., 2024. In this gene-modified iPSC line (LVPEIi005-A-1), the point mutation in the parental line was corrected in both alleles using an en31FnCas9-based adenine base editor (Addgene Plasmid # 201956), and this has restored normal levels of full-length RPE65 protein expression in iPSC-derived RPE cells.
Repaired

Donor Information

General Donor Information

Sex male
Ethnicity Asian (Indian), 24 years

Phenotype and Disease related information (Donor)

Diseases A disease was diagnosed.
The donor/proband is clinically diagnosed with autosomal recessive form of congenital retinal dystrophy or LCA. Genetic testing of the blood sample has confirmed that the donor has inherited an homozygous point mutation within Exon 9 of RPE65 gene, thus resulting LCA2 disease pathology.
The donor is a carrier of a disease-associated mutation and affected.
Synonyms
  • LCA2
  • Leber congenital amaurosis 2
  • Leber congenital amaurosis caused by mutation in RPE65
  • Leber congenital amaurosis type 2
  • RPE65 Leber congenital amaurosis
  • amaurosis congenita of Leber, type 2
show more synonyms
Genetic variants
Chromosome 1:68438948
NM_000329.2:c.992G>A; NM_000329.3:c.992G>A
NP_000320.1:p.Trp331Ter
Homozygous
VCV001702637.5
Is the medical history available upon request? Yes
Is clinical information available? Clinical information will be provided on request

Other Genotyping (Donor)

Is there genome-wide genotyping or functional data available?
No

Donor Relations

Other cell lines of this donor

External Databases (Donor)

BioSamples SAMEA115169989

Ethics

Also have a look at the ethics information for the parental line LVPEIi005-A .
Is there an MTA available for the cell line? Yes
For generation of the cell line, who was the supplier of any recombined DNA vectors or commercial kits used? The gene editing vector plasmid, en31FnCas9-ABEmax8.17d, was obtained from the collaborator Dr. Debojyoti Chakraborty's lab at CSIR-IGIB. The RPE65 targeting CRISPR guide oligo was then cloned into the BbsI site, downstream of the U6 promoter.
Are you aware of any constraints on the use or distribution of the cell line from the owner or any parties identified in the query above? Yes
Constraints for use or distribution For research use only

iPSC Derivation

General

The source cell information can be found in the parental cell line LVPEIi005-A.

Reprogramming method

Vector type Non-integrating
Vector Episomal
Is reprogramming vector detectable?
No
Methods used
RT-PCR
Notes on reprogramming vector detection The vector backbone specific regions were found to be lost by passage 5

Vector free reprogramming

Type of used vector free reprogramming factor(s)
None

Other

Selection criteria for clones Clonies were seeded at low density and manually picked for clonal expansion
Derived under xeno-free conditions
Yes
Derived under GMP?
No
Available as clinical grade?
No

iPSC Culture Conditions

Surface coating Vitronectin
Feeder cells
No
Passage method Enzyme-free cell dissociation
EDTA
CO2 Concentration 5 %
Medium Essential 8™
Has Rock inhibitor (Y27632) been used at passage previously with this iPSC line?
Yes
Has Rock inhibitor (Y27632) been used at cryo previously with this iPSC line?
No
Has Rock inhibitor (Y27632) been used at thaw previously with this iPSC line?
Yes

iPSC Characterisation

Analysis of undifferentiated iPSCs
Marker Expressed Immunostaining RT-PCR Flow Cytometry Enzymatic Assay Expression Profiles
POU5F1 (OCT-4)
Yes
SOX2
Yes
NANOG
Yes
SSEA-4
Yes
KLF4
Yes
hTERT
Yes
Differentiation Potency
Endoderm
Ont Id: UBERON_0000925
In vitro spontaneous differentiation
Marker Expressed
MIXL1
Yes
GATA6
Yes
Protocol or reference
Mesoderm
Ont Id: UBERON_0000926
In vitro spontaneous differentiation
Marker Expressed
MSX2
Yes
ACTA2
Yes
Ectoderm
Ont Id: UBERON_0000924
In vitro spontaneous differentiation
Marker Expressed
PAX6
Yes
OTX2
Yes

Microbiology / Virus Screening

Mycoplasma Negative

Genotyping

Karyotyping (iPSC Line)

Has the iPSC line karyotype been analysed?
Yes
46,XY
Passage number: p20
Karyotyping method: G-Banding

Other Genotyping (iPSC Line)