{"doi":"10.1016/j.celrep.2022.110960","title":"Critical examination of Ptbp1-mediated glia-to-neuron conversion in the mouse retina","abstract":"Reprogramming glial cells to convert them into neurons represents a potential therapeutic strategy that could repair damaged neural circuits and restore function. Recent studies show that downregulation of the RNA-binding protein PTBP1 leads to one-step conversion of Müller glia (MG) into retinal ganglion cells (RGCs) with a high efficiency. However, the original study did not perform fate-mapping experiments to confirm MG-to-RGC conversion after Ptbp1 downregulation. To address the fundamental question of whether Ptbp1 downregulation can convert MG into RGCs in the mouse retina, we perform fate-mapping experiments to lineage trace MG independent of the adeno-associated virus (AAV)-mediated labeling system. Here, we report that Ptbp1 downregulation by CRISPR-CasRx or small hairpin RNA is insufficient to convert MG to RGCs. The original conclusion of MG-to-RGC conversion is due to leaky labeling of endogenous RGCs. Our results emphasize the importance of using stringent fate mapping to determine glia-to-neuron conversion in cell reprogramming research.","journal":"Cell Reports","year":2022,"id":237375,"datarank":0.0,"base_score":0.0,"endowment":0.0,"self_citation_contribution":0.0,"citation_network_contribution":0.0,"self_endowment_contribution":0.0,"citer_contribution":0.0,"corpus_percentile":null,"corpus_rank":null,"citation_count":61,"citer_count":0,"citers_with_citation_signal":0,"citers_with_endowment":0,"datacite_reuse_total":0,"is_dataset":false,"is_dataset_confidence":0.9578,"is_data_producer":false,"deposit_databanks":null,"is_oa":true,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":"2022-01-01","fair_score":null,"fair_percentile":null,"algorithm_id":"datarank_citation_only_1hop_v6","ranking_scope":"data_only","authors":[{"id":576881,"name":"Jing Zhou","orcid":"0000-0002-8475-7179","position":1,"is_corresponding":false},{"id":426485,"name":"Bo Chen","orcid":"0000-0003-2768-9007","position":2,"is_corresponding":false},{"id":859324,"name":"Ye Xie","orcid":"0000-0002-7561-8783","position":0,"is_corresponding":true}],"reference_count":26,"raw_metadata":null,"created_at":"2026-07-19T00:22:08.925400Z","pmid":"35705044","pmcid":null,"fwci":null,"citation_percentile":null,"influential_citations":0,"oa_status":null,"license":null,"views":0,"total_file_size_bytes":0,"version_count":0,"fair_f":null,"fair_a":null,"fair_i":null,"fair_r":null,"fair_zscore":null,"fair_rationale":null,"fair_model":null,"fair_agent_version":null,"fair_fulltext_source":null,"fair_has_llm":null,"fair_computed_at":null,"clinical_trials":[],"software_tools":[],"db_accessions":[],"linked_datasets":[],"topics":[]}