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Zhang J, Zou L, Tan F, Wang H, Wen Z, Wang H, Li L. Screening of co-expressed genes in hypopharyngeal carcinoma with esophageal carcinoma based on RNA sequencing and Clinical Research. Sci Rep 2024; 14:13796. [PMID: 38877096 PMCID: PMC11178892 DOI: 10.1038/s41598-024-64162-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Accepted: 06/05/2024] [Indexed: 06/16/2024] Open
Abstract
To explore the hub comorbidity genes and potential pathogenic mechanisms of hypopharyngeal carcinoma with esophageal carcinoma, and evaluate their diagnostic value for hypopharyngeal carcinoma with co-morbid esophageal carcinoma. We performed gene sequencing on tumor tissues from 6 patients with hypopharyngeal squamous cell carcinoma with esophageal squamous cell carcinoma (hereafter referred to as "group A") and 6 patients with pure hypopharyngeal squamous cell carcinoma (hereafter referred to as "group B"). We analyzed the mechanism of hub genes in the development and progression of hypopharyngeal squamous cell carcinoma with esophageal squamous cell carcinoma through bioinformatics, and constructed an ROC curve and Nomogram prediction model to analyze the value of hub genes in clinical diagnosis and treatment. 44,876 genes were sequenced in 6 patients with group A and 6 patients with group B. Among them, 76 genes showed significant statistical differences between the group A and the group B.47 genes were expressed lower in the group A than in the group B, and 29 genes were expressed higher. The top five hub genes were GABRG2, CACNA1A, CNTNAP2, NOS1, and SCN4B. GABRG2, CNTNAP2, and SCN4B in the hub genes have high diagnostic value in determining whether hypopharyngeal carcinoma patients have combined esophageal carcinoma (AUC: 0.944, 0.944, 0.972). These genes could possibly be used as potential molecular markers for assessing the risk of co-morbidity of hypopharyngeal carcinoma combined with esophageal carcinoma.
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Affiliation(s)
- Jianing Zhang
- Department of Otorhinolaryngology Head and Neck Surgery, Central Hospital of Chaoyang, Liaoning, 122000, China
| | - Liangyu Zou
- Department of Otorhinolaryngology Head and Neck Surgery, Central Hospital of Chaoyang, Liaoning, 122000, China
| | - Fuxian Tan
- Department of Otorhinolaryngology Head and Neck Surgery, Central Hospital of Chaoyang, Liaoning, 122000, China
| | - Hongmin Wang
- Department of Otorhinolaryngology Head and Neck Surgery, Central Hospital of Chaoyang, Liaoning, 122000, China
| | - Zhenlei Wen
- Department of Otorhinolaryngology Head and Neck Surgery, Central Hospital of Chaoyang, Liaoning, 122000, China
| | - Hongmei Wang
- Department of Otorhinolaryngology Head and Neck Surgery, Central Hospital of Chaoyang, Liaoning, 122000, China
| | - Lianhe Li
- Department of Otorhinolaryngology Head and Neck Surgery, Central Hospital of Chaoyang, Liaoning, 122000, China.
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Qin XY, Ha SY, Chen L, Zhang T, Li MQ. Recent Advances in Folates and Autoantibodies against Folate Receptors in Early Pregnancy and Miscarriage. Nutrients 2023; 15:4882. [PMID: 38068740 PMCID: PMC10708193 DOI: 10.3390/nu15234882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2023] [Revised: 11/13/2023] [Accepted: 11/14/2023] [Indexed: 12/18/2023] Open
Abstract
Though firstly identified in cerebral folate deficiency, autoantibodies against folate receptors (FRAbs) have been implicated in pregnancy complications such as miscarriage; however, the underlying mechanism needs to be further elaborated. FRAbs can be produced via sensitization mediated by folate-binding protein as well as gene mutation, aberrant modulation, or degradation of folate receptors (FRs). FRAbs may interfere with folate internalization and metabolism through blocking or binding with FRs. Interestingly, different types of FRs are expressed on trophoblast cells, decidual epithelium or stroma, and macrophages at the maternal-fetal interface, implying FRAbs may be involved in the critical events necessary for a successful pregnancy. Thus, we propose that FRAbs may disturb pregnancy establishment and maintenance by modulating trophoblastic biofunctions, placental development, decidualization, and decidua homeostasis as well as the functions of FOLR2+ macrophages. In light of these findings, FRAbs may be a critical factor in pathological pregnancy, and deserve careful consideration in therapies involving folic acid supplementation for pregnancy complications.
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Affiliation(s)
- Xue-Yun Qin
- Laboratory for Reproductive Immunology, Hospital of Obstetrics and Gynecology, Fudan University, Shanghai 200080, China; (X.-Y.Q.); (S.-Y.H.)
| | - Si-Yao Ha
- Laboratory for Reproductive Immunology, Hospital of Obstetrics and Gynecology, Fudan University, Shanghai 200080, China; (X.-Y.Q.); (S.-Y.H.)
| | - Lu Chen
- Assisted Reproductive Technology Unit, Department of Obstetrics and Gynecology, Faculty of Medicine, Chinese University of Hong Kong, Hong Kong 999077, China;
| | - Tao Zhang
- Assisted Reproductive Technology Unit, Department of Obstetrics and Gynecology, Faculty of Medicine, Chinese University of Hong Kong, Hong Kong 999077, China;
| | - Ming-Qing Li
- Laboratory for Reproductive Immunology, Hospital of Obstetrics and Gynecology, Fudan University, Shanghai 200080, China; (X.-Y.Q.); (S.-Y.H.)
- Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases, Hospital of Obstetrics and Gynecology, Fudan University, Shanghai 200080, China
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Shen K, Chen B, Yang L, Gao W. KYNU as a Biomarker of Tumor-Associated Macrophages and Correlates with Immunosuppressive Microenvironment and Poor Prognosis in Gastric Cancer. Int J Genomics 2023; 2023:4662480. [PMID: 37954130 PMCID: PMC10635752 DOI: 10.1155/2023/4662480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Revised: 08/14/2023] [Accepted: 10/12/2023] [Indexed: 11/14/2023] Open
Abstract
Background Kynureninase (KYNU) is a potential prognostic marker for various tumor types. However, no reports on the biological effects and prognostic value of KYNU in gastric cancer (GC) exist. Methods GC-associated single-cell RNA sequencing and bulk RNA sequencing (bulk-seq) data were obtained from the Gene Expression Omnibus and The Cancer Genome Atlas databases, respectively. The differential expression of KYNU between GC and normal gastric tissues was first analyzed based on the bulk-seq data, followed by an exploration of the relationship between KYNU and various clinicopathological features. The Kaplan-Meier survival and Cox regression analyses were performed to determine the prognostic value of KYNU. The relationship between KYNU expression and immune cell infiltration and immune checkpoints was also explored. The biological function of KYNU was further examined at the single-cell level, and in vitro experiments were performed to examine the effect of KYNU on GC cell proliferation and invasion. Results KYNU expression was significantly elevated in GC samples. Clinical features and survival analysis indicated that high KYNU expression was associated with poor clinical phenotypes and prognosis, whereas Cox analysis showed that KYNU was an independent risk factor for patients with GC. Notably, high expression of KYNU induced a poor immune microenvironment and contributed to the upregulation of immune checkpoints. KYNU-overexpressing macrophages drove GC progression through unique ligand-receptor pairs and transcription factors and were associated with adverse clinical phenotypes in GC. KYNU was overexpressed in GC cells in vitro, and KYNU knockout significantly inhibited GC cell proliferation and invasion. Conclusion High KYNU expression promotes an adverse immune microenvironment and low survival rates in GC. KYNU and KYNU-related macrophages may serve as novel molecular targets in the treatment of GC.
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Affiliation(s)
- Kaiyu Shen
- The Second Clinical Medical College of Zhejiang Chinese Medical University, Hangzhou 310053, China
| | - Binyu Chen
- The Second Clinical Medical College of Zhejiang Chinese Medical University, Hangzhou 310053, China
| | - Liu Yang
- The Second Clinical Medical College of Zhejiang Chinese Medical University, Hangzhou 310053, China
| | - Wencang Gao
- Department of Oncology, The Second Affiliated Hospital, Zhejiang Chinese Medical University, Hangzhou 310005, China
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Zhang JW, Wang YN, Zhong ML, Liang MR. Kynureninase knockdown inhibits cisplatin resistance in vivo and in vitro and impacts the prognosis of cervical adenocarcinoma. Cell Div 2023; 18:15. [PMID: 37742026 PMCID: PMC10518096 DOI: 10.1186/s13008-023-00098-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Accepted: 09/18/2023] [Indexed: 09/25/2023] Open
Abstract
BACKGROUND Chemotherapy resistance is a leading cause of treatment failure in cases of cervical adenocarcinoma (ADC), and no effective treatment approach has yet been found. We previously identified the differentially expressed kynureninase (KYNU) mRNA in cervical adenocarcinoma cells (HeLa) and cervical adenocarcinoma cisplatin resistance cells (HeLa/DDP) using gene chips. However, the role and potential mechanism of KYNU in the cisplatin resistance of cervical adenocarcinoma remain unclear. METHODS We verified the expression of KYNU in the cells and tissues of ADC patients and analyzed its correlation with patient prognosis. A stable HeLa/DDP cell line with KYNU mRNA knockdown was constructed. We then used a CCK8 assay to detect cell survival, a transwell assay to evaluate cell migration and proliferation and flow cytometry to measure apoptosis. The effect of KYNU silence on cisplatin sensitivity was evaluated in an orthotopic model of metastatic ADC. Immunohistochemistry was performed to determine the changes in relevant drug resistance-associated protein expression, aiming to explore the underlying mechanism of KYNU-mediated drug resistance. RESULTS KYNU is overexpressed in HeLa/DDP cells and tissues and is associated with the poor prognoses of patients with ADC. After KYNU mRNA knockdown, the invasion, migration, and proliferation of HeLa/DDP cells in the cisplatin environment significantly reduced, while the apoptosis rate of HeLa/DDP cells significantly increased. Meanwhile, KYNU knockdown improved the DDP sensitivity of ADC in vivo. Furthermore, silencing KYNU decreased the expressions of CD34 and the drug-resistance related proteins P-gp, MRP1, and GST-π and increased the level of the proapoptotic regulatory protein Bax. CONCLUSION KYNU deficiency enhanced DDP sensitivity by suppressing cell proliferation, migration, and invasion and promoting apoptosis in DDP-resistant ADC cells in vitro. Furthermore, KYNU knockdown improved the drug sensitivity of ADC in vivo. The results showed that KYNU is involved in the chemotherapy resistance of cervical adenocarcinoma.
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Affiliation(s)
- Jun-Wen Zhang
- Children's Hospital, Zhejiang University School of Medicine, Hangzhou, 310000, Zhejiang, China
| | - Ya-Nan Wang
- Oncology Department of Jiangxi Maternal and Child Health Care Hospital, No. 318, Bayi Avenue, Nanchang, 330006, Jiangxi, China
| | - Mei-Ling Zhong
- Oncology Department of Jiangxi Maternal and Child Health Care Hospital, No. 318, Bayi Avenue, Nanchang, 330006, Jiangxi, China
| | - Mei-Rong Liang
- Oncology Department of Jiangxi Maternal and Child Health Care Hospital, No. 318, Bayi Avenue, Nanchang, 330006, Jiangxi, China.
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Nie J, Li L, Tan F, Wang H, Wang H, Zou L, Wen Z. Effect of CADM1 on TPF-induced chemotherapy in laryngeal squamous cell carcinoma. J Int Med Res 2023; 51:3000605231168017. [PMID: 37114505 DOI: 10.1177/03000605231168017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/29/2023] Open
Abstract
OBJECTIVES To explore the relationship between CADM1 expression and sensitivity to TPF-induced chemotherapy in laryngeal squamous cell carcinoma (LSCC) patients, then investigate its potential mechanisms. METHODS Differential CADM1 expression was examined in chemotherapy-sensitive and chemotherapy-insensitive LSCC patient samples after TPF-induced chemotherapy using microarray analysis. Receiver operating characteristic (ROC) curve analysis and bioinformatics approaches were used to investigate the diagnostic value of CADM1. Small interfering RNAs (siRNAs) were used to knock down CADM1 expression in an LSCC cell line. Differential CADM1 expression was compared by qRT-PCR assays in 35 LSCC patients treated with chemotherapy, including 20 chemotherapy-sensitive and 15 chemotherapy-insensitive patients. RESULTS Public database and primary patient data both suggest that CADM1 mRNA is expressed at lower levels in chemotherapy-insensitive LSCC samples, suggesting its potential usefulness as a biomarker. Knockdown of CADM1 with siRNAs led to decreased sensitivity of LSCC cells to TPF chemotherapy. CONCLUSIONS Upregulation of CADM1 expression can alter the sensitivity of LSCC tumors to TPF induction chemotherapy. CADM1 is a possible molecular marker and therapeutic target for induction chemotherapy in LSCC patients.
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Affiliation(s)
- Jiani Nie
- Chengde Medical University, Heibei, China
| | - Lianhe Li
- Department of Otorhinolaryngology Head and Neck Surgery, Central Hospital of Chaoyang, Liaoning, China
| | - Fuxian Tan
- Department of Otorhinolaryngology Head and Neck Surgery, Central Hospital of Chaoyang, Liaoning, China
| | - Hongmei Wang
- Department of Otorhinolaryngology Head and Neck Surgery, Central Hospital of Chaoyang, Liaoning, China
| | - Hongmin Wang
- Department of Otorhinolaryngology Head and Neck Surgery, Central Hospital of Chaoyang, Liaoning, China
| | - Liangyu Zou
- Department of Otorhinolaryngology Head and Neck Surgery, Central Hospital of Chaoyang, Liaoning, China
| | - Zhenlei Wen
- Department of Otorhinolaryngology Head and Neck Surgery, Central Hospital of Chaoyang, Liaoning, China
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Lv Y, Wang Y, Zhang Z. Potentials of lncRNA-miRNA-mRNA networks as biomarkers for laryngeal squamous cell carcinoma. Hum Cell 2023; 36:76-97. [PMID: 36181662 DOI: 10.1007/s13577-022-00799-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2022] [Accepted: 09/26/2022] [Indexed: 01/11/2023]
Abstract
Chemoresistance, radioresistance, and facile spreading of laryngeal squamous cell carcinoma (LSCC) make the practically clinical treatment invalid. Such dismal outcome mainly originates from the lack of effective biomarkers which are highly desirable to understand the pathogenesis of LSCC, and strives to find promising novel biomarkers to improve early screening, effective treatment, and prognosis evaluation in LSCC. Recently, long non-coding RNAs (lncRNAs), a kind of non-coding RNAs longer than 200 nucleotides, can participate in the process of tumorigenesis and progression through many regulatory modalities, such as epigenetic transcriptional regulation and post-transcriptional regulation. Meanwhile, microRNAs (miRNAs, miRs), essentially involved in the post-transcriptional regulation of gene expression, are aberrantly expressed in cancer-related genomic regions or susceptible sites. An increasing number of studies have shown that lncRNAs are important regulators of miRNAs expression in LSCC, and that miRNAs can also target to regulate the expression of lncRNAs, and they can target to regulate downstream messenger RNAs (mRNAs) transcriptionally or post-transcriptionally, thereby affecting various physiopathological processes of LSCC. Complex cross-regulatory networks existing among lncRNAs, miRNAs, and mRNAs can regulate the tumorigenesis and development of LSCC. Such networks may become promising biomarkers and potential therapeutic targets in the research field of LSCC. In this review, we mainly summarize the latest research progress on the regulatory relationships among lncRNAs, miRNAs, and downstream mRNAs, and highlight the potential applications of lncRNA-miRNA-mRNA regulatory networks as biomarkers for the early diagnosis, epithelial-mesenchymal transition (EMT) process, chemoresistance, radioresistance, and prognosis of LSCC, aiming to provide important clues for understanding the pathogenesis of LSCC and developing new diagnostic and therapeutic strategies.
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Affiliation(s)
- Yan Lv
- The Hubei Key Laboratory of Tumor Microenvironment and Immunotherapy, China Three Gorges University, Yichang, 443002, China
| | - Yanhua Wang
- The Hubei Key Laboratory of Tumor Microenvironment and Immunotherapy, China Three Gorges University, Yichang, 443002, China. .,Department of Morphology, Medical College of China Three Gorges University, Life Science Building, No.8 Daxue Road, Yichang, 443002, China.
| | - Zhikai Zhang
- The Third-Grade Pharmacological Laboratory on Chinese Medicine Approved by State Administration of Traditional Chinese Medicine, China Three Gorges University, Yichang, 443002, China
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He S, Arikin A, Chen J, Huang T, Wu Z, Wang L, Yang F, Li Y, Yang Y, Wang R, Lian M, Zhong Q, Fang J. Transcriptome Analysis Identified 2 New lncRNAs Associated with the Metastasis of Papillary Thyroid Carcinoma. ORL J Otorhinolaryngol Relat Spec 2021; 84:247-254. [PMID: 34818244 DOI: 10.1159/000518085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Accepted: 06/20/2021] [Indexed: 11/19/2022]
Abstract
INTRODUCTION Papillary thyroid microcarcinoma (PTMC) is a specific subgroup of papillary thyroid carcinoma and defined with the dimension ≤1 cm by the WHO. Although it shows a relatively high 10-year livability, the metastasis of PTMC into other tissues and organs seriously affects the daily life of patients with relatively high mortality. Therefore, the genetic basis for the metastasis of PTMC needs to be explored for effective therapeutic targets. Here, we conducted a series of comparative analysis of the transcriptional expression profile between PTMC patients with and without lymph node metastasis. METHODS Gene expression profile and gene function were analyzed using RNA extracted from pathological tissues of 12 patients with PTMC, and the core biomarkers closely related to its metastasis were identified. RESULTS Our results showed that 7,507 genes and 42 RNAs showed remarkably different expression patterns. More sophisticated analysis showed that the high expression of 2 lncRNAs (T077499 and T004533) resulted in the metastasis of PTMC, which suggests that the expression pattern of the 2 lncRNAs may act as a potential biomarker for pathogenesis and prognosis of PTMC metastasis. CONCLUSION Our findings preliminarily reveal the molecular mechanisms for PTMC metastasis, which will provide vital reference for subsequent studies about the genetic basis and molecular targeted therapy for PTMC metastasis.
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Affiliation(s)
- Shizhi He
- Department of Otolaryngology Head Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing, China
| | - Abdeyrim Arikin
- Department of Otorhinolaryngology Head and Neck Surgery, The People's Hospital of Xinjiang Uygur Autonomous Region, Ürümqi, China
| | - Jiaming Chen
- Department of Otolaryngology Head Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing, China
| | - Tianqiao Huang
- Department of Otolaryngology Head Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing, China
| | - Zhen Wu
- Department of Otolaryngology Head Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing, China
| | - Lingwa Wang
- Department of Otolaryngology Head Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing, China
| | - Fan Yang
- Department of Otolaryngology Head Neck Surgery, Beijing Anzhen Hospital, Capital Medical University, Beijing, China
| | - Yunxia Li
- Department of Otolaryngology Head Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing, China
| | - Yifan Yang
- Department of Otolaryngology Head Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing, China
| | - Ru Wang
- Department of Otolaryngology Head Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing, China
| | - Meng Lian
- Department of Otolaryngology Head Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing, China
| | - Qi Zhong
- Department of Otolaryngology Head Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing, China
| | - Jugao Fang
- Department of Otolaryngology Head Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing, China
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Dai WL, Yuan SX, Cao JP. The deubiquitinase USP34 stabilizes SOX2 and induces cell survival and drug resistance in laryngeal squamous cell carcinoma. Kaohsiung J Med Sci 2020; 36:983-989. [PMID: 32783291 DOI: 10.1002/kjm2.12285] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 06/13/2020] [Accepted: 07/08/2020] [Indexed: 01/14/2023] Open
Abstract
Recent studies showed that the deubiquitinase ubiquitin-specific protease 34 (USP34) was involved in the tumorigenesis of several tumors, but its function and mechanism are still unclear in laryngeal squamous cell carcinoma (LSCC). In this study, we found that USP34 and SOX2 were elevated in LSCC tumor tissues, and we also found that USP34 expression was positively correlated with SOX2 expression. Our further studies showed that USP34 regulated the protein level of SOX2 in LSCC cells, but not the mRNA level, which suggested that USP34 stabilized SOX2. Moreover, USP34, as a deubiquitinase, could interact with SOX2, and reduce the polyubiquitination of SOX2. In addition, knockdown of USP34 could significantly inhibit LSCC cell growth, but overexpression of SOX2 could reverse this effect. Finally, we also found that USP34 and SOX2 were upregulated in cisplatin-resistant LSCC cells, but knockdown of USP34 could enhance the drug sensitivity of cisplatin in the resistant cells. Collectively, targeting USP34/SOX2 axis may be a promising strategy for the treatment of LSCC.
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Affiliation(s)
- Wei-Li Dai
- Department of Otolaryngology, Division of Disease Control and Prevention, Office of Hospital Infection Management, Beijing Hospital of Traditional Chinese Medicine Affiliated to Capital Medical University, Beijing, P.R. China
| | - Shu-Xian Yuan
- Department of Otolaryngology, Beijing Pinggu Hospital of Traditional Chinese Medicine, Beijing, P.R. China
| | - Jing-Peng Cao
- Department of Otolaryngology, Lhasa People's Hospital, Lhasa, P.R. China
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Endou M, Yoshida K, Hirota M, Nakajima C, Sakaguchi A, Komatsubara N, Kurihara Y. Coxfa4l3, a novel mitochondrial electron transport chain Complex 4 subunit protein, switches from Coxfa4 during spermatogenesis. Mitochondrion 2020; 52:1-7. [PMID: 32045714 DOI: 10.1016/j.mito.2020.02.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 12/26/2019] [Accepted: 02/07/2020] [Indexed: 02/08/2023]
Abstract
We identified Coxfa4l3, previously called C15orf48 or Nmes1, as a novel accessory protein of Complex IV of the mitochondrial electron transport chain (ETC). Amino acid sequence comparison, the intracellular localization and the protein expression data showed that the protein is the third isoform of Coxfa4 and the expression of Coxfa4 and Coxfa4l3 proteins during spermatogenesis showed a mutually exclusive pattern, implying that Coxfa4 replaces Coxfa4l3 in Complex IV after meiosis. These results may provide some insight into the unique mechanism of ATP production in late spermatogenesis.
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Affiliation(s)
- Masahiro Endou
- Graduate School of Engineering Science, Yokohama National University, Yokohama 240-8501, Japan
| | - Kaito Yoshida
- Graduate School of Engineering Science, Yokohama National University, Yokohama 240-8501, Japan
| | - Makoto Hirota
- Graduate School of Engineering Science, Yokohama National University, Yokohama 240-8501, Japan
| | - Chika Nakajima
- Graduate School of Engineering Science, Yokohama National University, Yokohama 240-8501, Japan
| | - Atsumi Sakaguchi
- Graduate School of Engineering Science, Yokohama National University, Yokohama 240-8501, Japan
| | - Naoto Komatsubara
- College of Engineering Science, Yokohama National University, Yokohama 240-8501, Japan
| | - Yasuyuki Kurihara
- Laboratory of Molecular Biology, Faculty of Engineering Science, Yokohama National University, Yokohama 240-8501, Japan.
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