1.Generation of Induced Pluripotent Stem Cells from Lymphoblastoid Cell Lines by Electroporation of Episomal Vectors
Myunghyun KIM ; Junmyeong PARK ; Sujin KIM ; Dong Wook HAN ; Borami SHIN ; Hans Robert SCHÖLER ; Johnny KIM ; Kee-Pyo KIM
International Journal of Stem Cells 2023;16(1):36-43
Background and Objectives:
Lymphoblastoid cell lines (LCLs) deposited from disease-affected individuals could be a valuable donor cell source for generating disease-specific induced pluripotent stem cells (iPSCs). However, generation of iPSCs from the LCLs is still challenging, as yet no effective gene delivery strategy has been developed.
Methods:
and Results: Here, we reveal an effective gene delivery method specifically for LCLs. We found that LCLs appear to be refractory toward retroviral and lentiviral transduction. Consequently, lentiviral and retroviral transduction of OCT4, SOX2, KFL4 and c-MYC into LCLs does not elicit iPSC colony formation. Interestingly, however we found that transfection of oriP/EBNA-1-based episomal vectors by electroporation is an efficient gene delivery system into LCLs, enabling iPSC generation from LCLs. These iPSCs expressed pluripotency makers (OCT4, NANOG, SSEA4, SALL4) and could form embryoid bodies.
Conclusions
Our data show that electroporation is an effective gene delivery method with which LCLs can be efficiently reprogrammed into iPSCs.
2.Spontaneous Pneumomediastinum, Pneumopericardium, and Pneumothorax with Respiratory Failure in a Patient with AIDS and Pneumocystis jirovecii Pneumonia.
Yun Kyung PARK ; Hee Chan JUNG ; Shin Young KIM ; Min Young KIM ; Kwanhoon JO ; Se Young KIM ; Borami KANG ; Gihyeon WOO ; Hyun Joo CHOI ; Seong Heon WIE
Infection and Chemotherapy 2014;46(3):204-208
Spontaneous pneumothorax occurs in up to 35% of patients with Pneumocystis jirovecii pneumonia. However, spontaneous pneumomediastinum and pneumopericardium are uncommon complications in patients infected with human immunodeficiency virus, with no reported incidence rates, even among patients with acquired immunodeficiency syndrome (AIDS) and P. jirovecii pneumonia. We report a case of spontaneous pneumomediastinum, pneumopericardium, and pneumothorax with respiratory failure during treatment of P. jirovecii pneumonia in a patient with AIDS; the P. jirovecii infection was confirmed by performing methenamine silver staining of bronchoalveolar lavage specimens. This case suggests that spontaneous pneumomediastinum and pneumopericardium should be considered in patients with AIDS and P. jirovecii pneumonia.
Acquired Immunodeficiency Syndrome
;
Bronchoalveolar Lavage
;
HIV
;
Humans
;
Incidence
;
Mediastinal Emphysema*
;
Methenamine
;
Pneumocystis jirovecii*
;
Pneumonia*
;
Pneumopericardium*
;
Pneumothorax*
;
Respiratory Insufficiency*