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Eum D, Ji YJ, Kim HJ. Comparison of the success rate of tracheal intubation between stylet and bougie with a hyperangulated videolaryngoscope: a randomised controlled trial. Anaesthesia 2024; 79:603-610. [PMID: 38114306 DOI: 10.1111/anae.16202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/14/2023] [Indexed: 12/21/2023]
Abstract
Hyperangulated videolaryngoscopes are known to increase the success rate of tracheal intubation in the setting of difficult airway management when used with a stylet or bougie. However, there is controversy over which adjunct is more useful. This randomised study aimed to compare first attempt tracheal intubation success rate between a stylet and bougie when using a hyperangulated videolaryngoscope. We recruited patients aged > 20 years who were scheduled for elective surgery under general anaesthesia and required tracheal intubation. We only included patients with factors predicting difficult tracheal intubation based on pre-anaesthesia airway evaluation. Tracheal intubation was attempted using a Glidescope® with either a stylet or bougie as an adjunct according to group assignment. Primary outcome was the success rate of the first tracheal intubation attempt, and secondary outcomes were success of second and third attempts; tracheal intubation time; and occurrence of sore throat, dysphagia or hoarseness. A total of 166 patients were included. The success rate of the first tracheal intubation attempt was significantly higher in patients allocated to the bougie group compared with those allocated to the stylet group (81/83 (98%) vs. 73/83 (88%), respectively; p = 0.032). The number of patients who needed two attempts was significantly lower in those allocated to the bougie group compared with those allocated to the stylet group (1/83 (1%) vs. 9/83 (11%), respectively; p = 0.018). Each group had one patient (1%) where tracheal intubation was achieved after a third attempt. There was no significant difference in the occurrence of sore throat, dysphagia and hoarseness between the two groups. When difficult tracheal intubation is anticipated and a hyperangulated videolaryngoscope is used, the success rate of the first attempt is higher when a bougie is used compared with a stylet.
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Affiliation(s)
- D Eum
- Department of Anesthesiology and Pain Medicine, Yonsei University College of Medicine, Seoul, South Korea
| | - Y J Ji
- Department of Anesthesiology and Pain Medicine, Yonsei University College of Medicine, Seoul, South Korea
| | - H J Kim
- Department of Anesthesiology and Pain Medicine, Yonsei University College of Medicine, Seoul, South Korea
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Cheng FL, Ji YJ, Zhang HX, Fu SR, Zhao CQ. [Research advances in clinical diagnosis and treatment of sinonasal NUT carcinoma]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2024; 59:86-93. [PMID: 38246767 DOI: 10.3760/cma.j.cn115330-20230812-00043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 01/23/2024]
Affiliation(s)
- F L Cheng
- Department of Otolaryngology Head Neck Surgery, the Second Hospital, Shanxi Medical University, Taiyuan 030001, China Key Research Laboratory of Airway Neuroimmunology of Shanxi Province, Taiyuan 030001, China
| | - Y J Ji
- Department of Otolaryngology Head Neck Surgery, the Second Hospital, Shanxi Medical University, Taiyuan 030001, China Key Research Laboratory of Airway Neuroimmunology of Shanxi Province, Taiyuan 030001, China
| | - H X Zhang
- Department of Otolaryngology Head Neck Surgery, the Second Hospital, Shanxi Medical University, Taiyuan 030001, China Key Research Laboratory of Airway Neuroimmunology of Shanxi Province, Taiyuan 030001, China
| | - S R Fu
- Department of Otolaryngology Head Neck Surgery, the Second Hospital, Shanxi Medical University, Taiyuan 030001, China Key Research Laboratory of Airway Neuroimmunology of Shanxi Province, Taiyuan 030001, China
| | - C Q Zhao
- Department of Otolaryngology Head Neck Surgery, the Second Hospital, Shanxi Medical University, Taiyuan 030001, China Key Research Laboratory of Airway Neuroimmunology of Shanxi Province, Taiyuan 030001, China
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Ji YJ, Yu PX, Shang YW, Dong R, Xue JM, Suo LM, Zhao CQ. [Hemophilic pseudotumor involving nasal septum: a case report]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2023; 58:792-794. [PMID: 37599241 DOI: 10.3760/cma.j.cn115330-20221123-00706] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 08/22/2023]
Affiliation(s)
- Y J Ji
- Department of Otorhinolaryngology Head and Neck Surgery, the Second Hospital of Shanxi Medical University, Taiyuan 030001, China
| | - P X Yu
- Department of Laboratory Medicine, Shanxi Bethune Hospital, Taiyuan 030032, China
| | - Y W Shang
- Department of Pathology, the Second Hospital of Shanxi Medical University, Taiyuan 030001, China
| | - R Dong
- Department of Otorhinolaryngology Head and Neck Surgery, the Second Hospital of Shanxi Medical University, Taiyuan 030001, China
| | - J M Xue
- Department of Otorhinolaryngology Head and Neck Surgery, the Second Hospital of Shanxi Medical University, Taiyuan 030001, China
| | - L M Suo
- Department of Otorhinolaryngology Head and Neck Surgery, the Second Hospital of Shanxi Medical University, Taiyuan 030001, China
| | - C Q Zhao
- Department of Otorhinolaryngology Head and Neck Surgery, the Second Hospital of Shanxi Medical University, Taiyuan 030001, China
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Ji YJ, Dong R, Liang SY, Suo LM, Xue JM, Zhao CQ. [Clinical features and management analysis of 11 cases of laryngocele]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2023; 58:470-475. [PMID: 37150993 DOI: 10.3760/cma.j.cn115330-20221008-00596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Objective: To summarize clinical features and our experience of the diagnosis and treatment of laryngocele. Methods: Clinical data of 11 laryngocele patients in department of Otorhinolaryngology Head and Neck Surgery of the Second Affiliated Hospital of Shanxi Medical University from January 2012 to December 2021 were retrospectively reviewed, including 9 men and 2 women, aged from 12 to 75 years, with median age of 56 years. Electronic laryngoscope was performed in 10 of all patients, laryngeal CT in 10 and cervical color ultrasound in 5 before operation.All the operations were performed under general anesthesia, and the external cervical approach was used for external and combined laryngocele. The internal laryngocele was resected by low temperature plasma through transoral endoscopy. Patients were followed up regularly after operation to evaluate the effect. Clinical feature, types of lesions, imaging findings, surgical approaches and follow-up results were analyzed through descriptive statistical method. Results: Eleven laryngocele patients were divided into mixed type (n=6), internal type (n=4) and external type (n=1).Nine patients presented with hoarseness or dysphonia, 7 with cervical mass and 1 with airway obstruction. Surgical resections were done through external cervical approach (n=7)or transoral endoscopic approach (n=4). All the operations were successful and no complication occurred. All cases were followed up from 17 to 110 months. No recurrence was encountered. Conclusions: Laryngocele is a rare lesion with atypical clinical presentation. Preoperative imaging including CT scan and electronic laryngoscope is essential to evaluate the location, and extent of the lesion, and to make the surgical plan.Complete surgical excision is required. Surgical resection is the only effective method for the treatment of laryngocele.
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Affiliation(s)
- Y J Ji
- Department of Otorhinolaryngology Head and Neck Surgery, the Second Affiliated Hospital of Shanxi Medical University, Taiyuan 030001, China
| | - R Dong
- Department of Otorhinolaryngology Head and Neck Surgery, the Second Affiliated Hospital of Shanxi Medical University, Taiyuan 030001, China
| | - S Y Liang
- Department of Otorhinolaryngology Head and Neck Surgery, the Second Affiliated Hospital of Shanxi Medical University, Taiyuan 030001, China
| | - L M Suo
- Department of Otorhinolaryngology Head and Neck Surgery, the Second Affiliated Hospital of Shanxi Medical University, Taiyuan 030001, China
| | - J M Xue
- Department of Otorhinolaryngology Head and Neck Surgery, the Second Affiliated Hospital of Shanxi Medical University, Taiyuan 030001, China
| | - C Q Zhao
- Department of Otorhinolaryngology Head and Neck Surgery, the Second Affiliated Hospital of Shanxi Medical University, Taiyuan 030001, China
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Xu NW, Ji YJ, Zhuo HD, Wang YJ, Qi XP, Xue JM, An YF, Suo LM, Zhao CQ. [Clinical analysis of 12 cases of laryngeal neuroendocrine carcinoma]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2022; 57:1334-1338. [PMID: 36404660 DOI: 10.3760/cma.j.cn115330-20220328-00138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Objective: To investigate the clinical and pathological features, treatments and prognosis of laryngeal neuroendocrine carcinoma (LNEC). Methods: We conducted the retrospective analysis of the clinical data of 12 patients with LNEC admitted to the Department of Otorhinolaryngology Head and Neck Surgery, Second Hospital of Shanxi Medical University from May 2014 to December 2021, including 9 males and 3 females, aged 50-77 years. There were 4 cases of typical carcinoid tumour (highly differentiated), 5 cases of atypical carcinoid tumour (moderately differentiated) and 3 cases of neuroendocrine small cell carcinoma (hypofractionated). The clinical features, diagnosis, treatment and prognosis of LNEC were analysed. Results: The clinical manifestations of LNEC varied according to the tumour type but did not correlate with the pathological types. The supraglottic type was characterized by sore throat, foreign body sensation in the pharynx, coughing, obstructive sensation when eating and choking on water. The treatments were determined according to the pathological types, lesion location and invasion scope. Of 12 patients 4 underwent horizontal partial laryngectomy plus elective lymphatic dissection plus postoperative radiotherapy/chemotherapy, 4 underwent vertical partial laryngectomy (3 of them with cervical lymphatic dissection), 3 underwent supported laryngoscopic plasma laryngectomy for laryngeal cancer, and 1 abandoned for treatment. With the follow-up of 8 -78 months, 5 patients were alive, 1 died from chemotherapy reactions, 3 died from other diseases, 1 died from lung metastasis, 1 died from lung infection and 1 was lost to follow-up. Conclusion: LNEC is clinically rare, the clinical manifestations are less specificity, diagnosis relies on pathological and immunohistochemical examinations, and treatment modalities and prognoses are closely related to the pathological subtypes of LNEC.
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Affiliation(s)
- N W Xu
- Second School of Clinical Medicine, Shanxi Medical University, Taiyuan 030001, China Department of Otorhinolaryngology Head Neck Surgery, the Second Hospital, Shanxi Medical University, Key Research Laboratory of Airway Neuroimmunology, Taiyuan 030001, China
| | - Y J Ji
- Department of Otorhinolaryngology Head Neck Surgery, the Second Hospital, Shanxi Medical University, Key Research Laboratory of Airway Neuroimmunology, Taiyuan 030001, China
| | - H D Zhuo
- Second School of Clinical Medicine, Shanxi Medical University, Taiyuan 030001, China Department of Otorhinolaryngology Head Neck Surgery, the Second Hospital, Shanxi Medical University, Key Research Laboratory of Airway Neuroimmunology, Taiyuan 030001, China
| | - Y J Wang
- Department of Otorhinolaryngology Head Neck Surgery, the Second Hospital, Shanxi Medical University, Key Research Laboratory of Airway Neuroimmunology, Taiyuan 030001, China
| | - X P Qi
- Department of Otorhinolaryngology Head Neck Surgery, the Second Hospital, Shanxi Medical University, Key Research Laboratory of Airway Neuroimmunology, Taiyuan 030001, China
| | - J M Xue
- Department of Otorhinolaryngology Head Neck Surgery, the Second Hospital, Shanxi Medical University, Key Research Laboratory of Airway Neuroimmunology, Taiyuan 030001, China
| | - Y F An
- Department of Otorhinolaryngology Head Neck Surgery, the Second Hospital, Shanxi Medical University, Key Research Laboratory of Airway Neuroimmunology, Taiyuan 030001, China
| | - L M Suo
- Department of Otorhinolaryngology Head Neck Surgery, the Second Hospital, Shanxi Medical University, Key Research Laboratory of Airway Neuroimmunology, Taiyuan 030001, China
| | - C Q Zhao
- Department of Otorhinolaryngology Head Neck Surgery, the Second Hospital, Shanxi Medical University, Key Research Laboratory of Airway Neuroimmunology, Taiyuan 030001, China
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Byun JY, Ji YJ, Kim KH, Kim KS, Tak HW, Ellingboe AR, Yeom GY. Characteristics of silicon nitride deposited by very high frequency (162 MHz)-plasma enhanced atomic layer deposition using bis(diethylamino)silane. Nanotechnology 2021; 32:075706. [PMID: 32942270 DOI: 10.1088/1361-6528/abb974] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Silicon nitrides, deposited by capacitively coupled plasma (CCP)-type plasma enhanced atomic layer deposition (PEALD), are generally applied to today's nanoscale semiconductor devices, and are currently being investigated in terms of their potential applications in the context of flexible displays, etc. During the PEALD process, 13.56 MHz rf power is generally employed for the generation of reactive gas plasma. In this study, the effects of a higher plasma generation frequency of 162 MHz on both plasma and silicon nitride film characteristics are investigated for the purpose of silicon nitride PEALD, using bis(diethylamino)silane (BDEAS) as the silicon precursor, and N2 plasma as the reactant gas. The PEALD silicon nitride film deposited using the 162 MHz CCP exhibited improved film characteristics, such as reduced surface roughness, a lower carbon percentage, a higher N/Si ratio, a lower wet etch rate in a diluted HF solution, lower leakage current, and higher electric breakdown field, and more uniform step coverage of the silicon nitride film deposited in a high aspect ratio trench, as compared to silicon nitride PEALD using 13.56 MHz CCP. These improved PEALD silicon nitride film characteristics are believed to be related to the higher ion density, higher reactive gas dissociation, and lower ion bombardment energy to the substrate observed in N2 plasma with a 162 MHz CCP.
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Affiliation(s)
- J Y Byun
- School of Advanced Materials Science and Engineering, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 16419, Republic of Korea
| | - Y J Ji
- School of Advanced Materials Science and Engineering, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 16419, Republic of Korea
| | - K H Kim
- School of Advanced Materials Science and Engineering, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 16419, Republic of Korea
| | - K S Kim
- School of Advanced Materials Science and Engineering, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 16419, Republic of Korea
- Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA, United States of America
| | - H W Tak
- School of Advanced Materials Science and Engineering, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 16419, Republic of Korea
| | - A R Ellingboe
- Plasma Research Laboratory, School of Physical Science, Dublin City University, Dublin, Ireland
| | - G Y Yeom
- School of Advanced Materials Science and Engineering, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 16419, Republic of Korea
- SKKU Advanced Institute of Nano Technology (SAINT), Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 16419, Republic of Korea
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Ji YJ, Ugolino J, Zhang T, Lu J, Kim D, Wang J. C9orf72/ALFA-1 controls TFEB/HLH-30-dependent metabolism through dynamic regulation of Rag GTPases. PLoS Genet 2020; 16:e1008738. [PMID: 32282804 PMCID: PMC7188304 DOI: 10.1371/journal.pgen.1008738] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Revised: 04/28/2020] [Accepted: 03/25/2020] [Indexed: 12/13/2022] Open
Abstract
Nutrient utilization and energy metabolism are critical for the maintenance of cellular homeostasis. A mutation in the C9orf72 gene has been linked to the most common forms of neurodegenerative diseases that include amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD). Here we have identified an evolutionarily conserved function of C9orf72 in the regulation of the transcription factor EB (TFEB), a master regulator of autophagic and lysosomal genes that is negatively modulated by mTORC1. Loss of the C. elegans orthologue of C9orf72, ALFA-1, causes the nuclear translocation of HLH-30/TFEB, leading to activation of lipolysis and premature lethality during starvation-induced developmental arrest in C. elegans. A similar conserved pathway exists in human cells, in which C9orf72 regulates mTOR and TFEB signaling. C9orf72 interacts with and dynamically regulates the level of Rag GTPases, which are responsible for the recruitment of mTOR and TFEB on the lysosome upon amino acid signals. These results have revealed previously unknown functions of C9orf72 in nutrient sensing and metabolic pathways and suggest that dysregulation of C9orf72 functions could compromise cellular fitness under conditions of nutrient stress. An expansion of repeated nucleotides in the non-coding region of the C9orf72 gene has been linked to the neurodegenerative diseases amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD). The repeat expansion leads to a reduced expression of the C9orf72 gene and loss of function of the C9orf72 protein may contribute to the pathogenesis. In this study, we identified a new mechanism through which C9orf72 influences nutrient sensing, autophagy, and metabolism. In the multi-cellular organism Caenorhabditis elegans, the C9orf72 orthologue regulates the activity of TFEB, a crucial transcriptional regulator of autophagic and lysosomal genes, through which the lipid metabolism and survival are influenced especially under nutrient stress conditions. The regulatory effect of C9orf72 on TFEB is conserved in mammals, and this is mediated by the dynamic regulation of the Rag GTPases by C9orf72. Given the critical role of the Rag GTPases in nutrient sensing and autophagy, we propose that the C9orf72 function is important for metabolic homeostasis in the cell and its deficiency can lead to compromised fitness under stress conditions.
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Affiliation(s)
- Yon Ju Ji
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, United States of America
- Department of Neuroscience, School of Medicine, Johns Hopkins University, Baltimore, MD, United States of America
| | - Janet Ugolino
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, United States of America
- Department of Neuroscience, School of Medicine, Johns Hopkins University, Baltimore, MD, United States of America
| | - Tao Zhang
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, United States of America
- Department of Neuroscience, School of Medicine, Johns Hopkins University, Baltimore, MD, United States of America
| | - Jiayin Lu
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, United States of America
- Department of Neuroscience, School of Medicine, Johns Hopkins University, Baltimore, MD, United States of America
| | - Dohoon Kim
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, United States of America
| | - Jiou Wang
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, United States of America
- Department of Neuroscience, School of Medicine, Johns Hopkins University, Baltimore, MD, United States of America
- * E-mail:
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Zhao W, Ji YJ, An YF, Zhao CQ. [Endoscopic transpterygoid intervention for lesions of lateral recess of sphenoid sinus in 4 cases(with literature review) ]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2019; 33:411-415. [PMID: 31163547 DOI: 10.13201/j.issn.1001-1781.2019.05.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Indexed: 11/12/2022]
Abstract
Objective: To investigate the anatomy and application of endoscopic transpterygoid intervention in lesions of lateral recess of sphenoid sinus(LRSS). Method: Four hospitalized patients with lesions of LRSS were studied. The clinical presentations included spontaneous cerebrospinal fuild(CSF) leakage in 2 cases, meningoencephaolece complicated CSF leakage in 1 case and chronic invasive fungal sphenoid sinusitis invading the base of the middle fossa in 1 case. Endoscopic transpterygoid intervention and repairment of skull base defects were performed under general anesthesia. Result: he operations were successfu1 in all patients. One patient suffered from postoperative palatal hypesthesia and all the symptoms mentioned above relieved gradually 6 months after operation. No recurrence was found during the follow-up ranging from 6 to 45 months(mean follow-up period,22.75 months).Conclusion: Endoscopic transpterygoid intervention in lesions of LRSS is a minimally invasive and safe surgical approach.
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Affiliation(s)
- W Zhao
- Shanxi Medical University, Taiyuan, 030001, China
| | - Y J Ji
- Department of Otorhinolaryngology Head and Neck Surgery, the Second Hospital of Shanxi Medical University
| | - Y F An
- Department of Otorhinolaryngology Head and Neck Surgery, the Second Hospital of Shanxi Medical University
| | - C Q Zhao
- Department of Otorhinolaryngology Head and Neck Surgery, the Second Hospital of Shanxi Medical University
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Li LX, Ji YJ, Liu R, Han ZQ, Zhao CQ. [Expand prelacrimal recess-maxillary ainus approach for inferior orbital walls fracture treatment]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2019; 33:157-159. [PMID: 30808143 DOI: 10.13201/j.issn.1001-1781.2019.02.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Indexed: 11/12/2022]
Abstract
Objective: To investigate the surgical technique and curative effect of transnasal endoscopic anterior lacrimal approach for the treatment of sacral wall fractures. Method: Retrospective clinical analysis of 5 patients with inferior orbital walls fracture treated by expanding prelacrimal recess-maxillary ainus under nasal endoscope was studied, and the surgical method and its efficacy were annalyzed. Result: After 1 year of follow-up,4 patients' diplopia symptom disappeared, and 1 patient's diplopia symptom was significantly relieved compared with preoperation, the range of eye movement was normal and enophthalmos were totally corrected.Conclusion: Expanding prelacrimal recess-maxillary ainus approach for the treatment of the inferior orbital walls fracture is an effective surgical method.It has the characteristics of less trauma,no incision on the face, clear visual field and wide space of operation, which is worthy of clinical promotion.
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Affiliation(s)
- L X Li
- Shanxi Medical University, Taiyuan, 030000, China
| | - Y J Ji
- Department of Otolaryngology Head and Neck Surgery, the Second Hospital, Shanxi Medical University
| | - R Liu
- Department of Otolaryngology Head and Neck Surgery, the Second Hospital, Shanxi Medical University
| | - Z Q Han
- Shanxi Medical University, Taiyuan, 030000, China
| | - C Q Zhao
- Department of Otolaryngology Head and Neck Surgery, the Second Hospital, Shanxi Medical University
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Ji YJ, Li H, Xie PF, Li ZH, Li HW, Yin YL, Blachier F, Kong XF. Stages of pregnancy and weaning influence the gut microbiota diversity and function in sows. J Appl Microbiol 2019; 127:867-879. [PMID: 31237071 PMCID: PMC6852164 DOI: 10.1111/jam.14344] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Revised: 05/07/2019] [Accepted: 05/14/2019] [Indexed: 12/17/2022]
Abstract
Aims The gut microbiota is believed to play important roles in the health of pregnant mammals, including their nutrient metabolism, immune programming and metabolic regulation. However, until recently, the shifts in gut microbiota composition and faecal and blood metabolic activity during different stages of pregnancy had not been investigated. Methods and Results We investigated the shifts in backfat thickness, plasma and faecal metabolites and gut microbiota on days 30, 60, 90 and 110 of pregnancy and on day 21 after parturition (weaning) in sows. The backfat thickness of sows did not significantly differ among the different stages of pregnancy. The plasma concentrations of lipid metabolites, including triacylglycerol (TG), total cholesterol, high‐density lipoprotein‐cholesterol, low‐density lipoprotein‐cholesterol and calcium were reduced (P < 0·05) during pregnancy. In addition, the concentration of these metabolites, except TG, reached their maximum at the time of weaning. We also found that Tenericutes, Fibrobacteres and Cyanobacteria varied significantly according to the stages of pregnancy in sows (P < 0·05). Most of the genera, such as Clostridiales, Desulfovibrio, Mogibacteriaceae and Prevotella, increased (P < 0·05) with the progression of pregnancy and decreased (P < 0·05) at weaning. The alpha diversity values (i.e., Shannon diversity and observed species) of sow gut microbiota increased (P < 0·05) from pregnancy to weaning. Pregnancy stages also significantly influenced (P < 0·05) the community structure (beta diversity) of gut microbiota. The progression of pregnancy was associated with changes in lipid metabolism and several carbohydrate‐degradation bacteria (i.e., Prevotella, Succinivibrio, Bacteroides and Parabacteroides). Conclusions Although causal links between the measured parameters remain hypothetical, these findings suggest that the increased diversity and concentration of beneficial gut microbes are associated with the metabolism of pregnant sows. Significance and Impact of the Study Manipulation of the sow gut microbiota composition may potentially influence metabolism and health during pregnancy.
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Affiliation(s)
- Y J Ji
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Hunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Process, National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, Hunan, China
| | - H Li
- Institute of Occupational Health and Environmental Health, School of Public Health, Lanzhou University, Lanzhou, China
| | - P F Xie
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Hunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Process, National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, Hunan, China
| | - Z H Li
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Hunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Process, National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, Hunan, China
| | - H W Li
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Hunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Process, National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, Hunan, China
| | - Y L Yin
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Hunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Process, National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, Hunan, China
| | - F Blachier
- UMR PNCA, AgroParisTech, INRA, Université Paris-Saclay, Paris, France
| | - X F Kong
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Hunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Process, National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, Hunan, China
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Yu PX, Zhao Q, Meng ZM, Ji YJ. [ Rhabditis axei found in urine routine examination: a case report]. Zhongguo Xue Xi Chong Bing Fang Zhi Za Zhi 2019; 31:565-566. [PMID: 31713397 DOI: 10.16250/j.32.1374.2018181] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Rhabditis axei is a free-living nematode, which can occasionally invade into humans through drinking and contacting wastewater. It is usually parasitic in the digestive and urinary systems, causing the disease of rhabditelliasis axei. This paper reports a case of R. axei infection found in the urine routine examination.
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Affiliation(s)
- P X Yu
- Department of Clinical Laboratory, Shanxi Dayi Hospital, Shanxi Province, Taiyuan 030032, China
| | - Q Zhao
- Department of Clinical Laboratory, Shanxi Dayi Hospital, Shanxi Province, Taiyuan 030032, China
| | - Z M Meng
- Department of Clinical Laboratory, Shanxi Dayi Hospital, Shanxi Province, Taiyuan 030032, China
| | - Y J Ji
- Department of Otorhinolaryngology Head and Neck Surgery, Second Hospital of Shanxi Medical University, China
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12
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Ji YJ, Wang J. Heterochronic Phenotype Analysis of Hypodermal Seam Cells in Caenorhabditis elegans. Bio Protoc 2019; 9:e3132. [PMID: 30792567 PMCID: PMC6368992 DOI: 10.21769/bioprotoc.3132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2018] [Revised: 12/23/2018] [Accepted: 12/26/2018] [Indexed: 11/02/2022] Open
Abstract
Heterochrony refers to changes in the timing of developmental events, and it is precisely regulated in the organisms by the heterochronic genes such as C. elegans lin-4 and let-7. Mutations in these genes cause precocious or retarded development of certain cell lineages. With well-defined cell lineages, C. elegans is one of the best model systems to study heterochronic genes, since the subtle changes in the development of cell lineages can be easily identified. Among the different cell types in C. elegans, hypodermal seam cells and their lineages are well known to be maintained by lin-14, whose expression level is regulated by two miRNA genes, lin-4 and let-7, at the larval stages. Therefore, analyzing the heterochronic phenotype of hypodermal seam cells in C. elegans could yield detailed insights into the status of the miRNA pathway. Here we describe the assay protocol to analyze the heterochronic phenotypes of C. elegans hypodermal seam cells, which can be used as a reliable method to study the miRNA pathway.
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Affiliation(s)
- Yon Ju Ji
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA
| | - Jiou Wang
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA
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13
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Zhang T, Wu YC, Mullane P, Ji YJ, Liu H, He L, Arora A, Hwang HY, Alessi AF, Niaki AG, Periz G, Guo L, Wang H, Elkayam E, Joshua-Tor L, Myong S, Kim JK, Shorter J, Ong SE, Leung AKL, Wang J. FUS Regulates Activity of MicroRNA-Mediated Gene Silencing. Mol Cell 2019; 69:787-801.e8. [PMID: 29499134 DOI: 10.1016/j.molcel.2018.02.001] [Citation(s) in RCA: 63] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Revised: 11/22/2017] [Accepted: 01/31/2018] [Indexed: 12/13/2022]
Abstract
MicroRNA-mediated gene silencing is a fundamental mechanism in the regulation of gene expression. It remains unclear how the efficiency of RNA silencing could be influenced by RNA-binding proteins associated with the microRNA-induced silencing complex (miRISC). Here we report that fused in sarcoma (FUS), an RNA-binding protein linked to neurodegenerative diseases including amyotrophic lateral sclerosis (ALS), interacts with the core miRISC component AGO2 and is required for optimal microRNA-mediated gene silencing. FUS promotes gene silencing by binding to microRNA and mRNA targets, as illustrated by its action on miR-200c and its target ZEB1. A truncated mutant form of FUS that leads its carriers to an aggressive form of ALS, R495X, impairs microRNA-mediated gene silencing. The C. elegans homolog fust-1 also shares a conserved role in regulating the microRNA pathway. Collectively, our results suggest a role for FUS in regulating the activity of microRNA-mediated silencing.
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Affiliation(s)
- Tao Zhang
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD 21205, USA; Department of Neuroscience, School of Medicine, Johns Hopkins University, Baltimore, MD 21205, USA
| | - Yen-Ching Wu
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD 21205, USA; Department of Neuroscience, School of Medicine, Johns Hopkins University, Baltimore, MD 21205, USA
| | - Patrick Mullane
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD 21205, USA; Department of Neuroscience, School of Medicine, Johns Hopkins University, Baltimore, MD 21205, USA
| | - Yon Ju Ji
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD 21205, USA; Department of Neuroscience, School of Medicine, Johns Hopkins University, Baltimore, MD 21205, USA
| | - Honghe Liu
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD 21205, USA; Department of Neuroscience, School of Medicine, Johns Hopkins University, Baltimore, MD 21205, USA
| | - Lu He
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD 21205, USA; Department of Neuroscience, School of Medicine, Johns Hopkins University, Baltimore, MD 21205, USA
| | - Amit Arora
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD 21205, USA; Department of Neuroscience, School of Medicine, Johns Hopkins University, Baltimore, MD 21205, USA
| | - Ho-Yon Hwang
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD 21205, USA; Department of Neuroscience, School of Medicine, Johns Hopkins University, Baltimore, MD 21205, USA
| | - Amelia F Alessi
- Department of Biology, Krieger School of Arts and Sciences, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Amirhossein G Niaki
- Department of Biophysics, Krieger School of Arts and Sciences, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Goran Periz
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD 21205, USA; Department of Neuroscience, School of Medicine, Johns Hopkins University, Baltimore, MD 21205, USA
| | - Lin Guo
- Department of Biochemistry and Biophysics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Hejia Wang
- Department of Biochemistry and Biophysics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Elad Elkayam
- Keck Structural Biology Laboratory, Howard Hughes Medical Institute, Cold Spring Harbor Laboratory, Cold Spring Harbor, NY 11724, USA
| | - Leemor Joshua-Tor
- Keck Structural Biology Laboratory, Howard Hughes Medical Institute, Cold Spring Harbor Laboratory, Cold Spring Harbor, NY 11724, USA
| | - Sua Myong
- Department of Biophysics, Krieger School of Arts and Sciences, Johns Hopkins University, Baltimore, MD 21218, USA
| | - John K Kim
- Department of Biology, Krieger School of Arts and Sciences, Johns Hopkins University, Baltimore, MD 21218, USA
| | - James Shorter
- Department of Biochemistry and Biophysics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Shao-En Ong
- Department of Pharmacology, University of Washington, Seattle, WA 98195, USA
| | - Anthony K L Leung
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD 21205, USA; Department of Oncology, School of Medicine, Johns Hopkins University, Baltimore, MD 21205, USA
| | - Jiou Wang
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD 21205, USA; Department of Neuroscience, School of Medicine, Johns Hopkins University, Baltimore, MD 21205, USA.
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14
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Ji YJ, An YF, Xue JM, Li QF, Suo LM, Zhang YT, Hou R, Li Q, Cheng FL, Zhao CQ. [A preliminary study of a modified transnasal endoscopic three step vidian neurectomy]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2018; 32:1542-1545. [PMID: 30400703 DOI: 10.13201/j.issn.1001-1781.2018.20.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 08/18/2018] [Indexed: 11/12/2022]
Abstract
Objective:The aim of this study is to explore an improved trans-nasal endoscopic surgical approach for vidian neurectomy. Method:Ninety-one patients with nasal hyperreactive disease were collected, including 49 cases of allergic rhinitis and 42 cases of non allergic rhinitis. All sufferers enrolled in the study have treated with medicine, but the symptoms were not effectively controlled. Preoperative CT localization of the vidian canal was performed in each candidate. During the surgery a"Three-step" surgical approach were followed under endoscopic guidance in accordance with the operation procedures. Briefly, such a three-step procedure consists of the following, that is, a transnasal endoscopic sphenoidectomy through sphenoethmoidal recess as step one, with enlargement of the sinus ostium along the junction of the anterior wall and the floor of the sinus until the exposure of the vidian nerve canal toward the lateral wall of the sinus as step two. The last step was further exposure of the vidian nerve going through the canal and electric cautery preventing bleeding from the neurovascular bundle in the canal. Result:All patients were completed successfully with 100% preoperative CT location of the vidian canal in the CT scan and 100% intraoperative accurate exposure of the canal and therefore the cut of the vidian nerve. Conclusion:"Three-step" endoscopic resection of the vidian neurectomy is easy to master and repetitive with less injury.
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Affiliation(s)
- Y J Ji
- Department of Otolaryngology Head and Neck Surgery, Second Hospital of Shanxi Medical University, Taiyuan, 030001, China
| | - Y F An
- Department of Otolaryngology Head and Neck Surgery, Second Hospital of Shanxi Medical University, Taiyuan, 030001, China
| | - J M Xue
- Department of Otolaryngology Head and Neck Surgery, Second Hospital of Shanxi Medical University, Taiyuan, 030001, China
| | - Q F Li
- Department of Otolaryngology Head and Neck Surgery, Second Hospital of Shanxi Medical University, Taiyuan, 030001, China
| | - L M Suo
- Department of Otolaryngology Head and Neck Surgery, Second Hospital of Shanxi Medical University, Taiyuan, 030001, China
| | - Y T Zhang
- Department of Otolaryngology Head and Neck Surgery, Second Hospital of Shanxi Medical University, Taiyuan, 030001, China
| | - R Hou
- Department of Otolaryngology Head and Neck Surgery, Second Hospital of Shanxi Medical University, Taiyuan, 030001, China
| | - Q Li
- Department of Otolaryngology Head and Neck Surgery, Second Hospital of Shanxi Medical University, Taiyuan, 030001, China
| | - F L Cheng
- Department of Otolaryngology Head and Neck Surgery, Second Hospital of Shanxi Medical University, Taiyuan, 030001, China
| | - C Q Zhao
- Department of Otolaryngology Head and Neck Surgery, Second Hospital of Shanxi Medical University, Taiyuan, 030001, China
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15
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Liu Y, Wang T, Ji YJ, Johnson K, Liu H, Johnson K, Bailey S, Suk Y, Lu YN, Liu M, Wang J. A C9orf72-CARM1 axis regulates lipid metabolism under glucose starvation-induced nutrient stress. Genes Dev 2018; 32:1380-1397. [PMID: 30366907 PMCID: PMC6217731 DOI: 10.1101/gad.315564.118] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2018] [Accepted: 08/27/2018] [Indexed: 12/11/2022]
Abstract
Liu et al. report here that C9orf72, which is linked to the most common forms of the neurodegenerative diseases amyotrophic lateral sclerosis and frontotemporal dementia, is a key regulator of lipid metabolism under stress. Cells undergo metabolic adaptation during environmental changes by using evolutionarily conserved stress response programs. This metabolic homeostasis is exquisitely regulated, and its imbalance could underlie human pathological conditions. We report here that C9orf72, which is linked to the most common forms of the neurodegenerative diseases amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD), is a key regulator of lipid metabolism under stress. Loss of C9orf72 leads to an overactivation of starvation-induced lipid metabolism that is mediated by dysregulated autophagic digestion of lipids and increased de novo fatty acid synthesis. C9orf72 acts by promoting the lysosomal degradation of coactivator-associated arginine methyltransferase 1 (CARM1), which in turn regulates autophagy–lysosomal functions and lipid metabolism. In ALS/FTD patient-derived neurons or tissues, a reduction in C9orf72 function is associated with dysregulation in the levels of CARM1, fatty acids, and NADPH oxidase NOX2. These results reveal a C9orf72–CARM1 axis in the control of stress-induced lipid metabolism and implicates epigenetic dysregulation in relevant human diseases.
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Affiliation(s)
- Yang Liu
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland 21205, USA.,Department of Neuroscience, School of Medicine, Johns Hopkins University, Baltimore, Maryland 21205, USA
| | - Tao Wang
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland 21205, USA.,Department of Neuroscience, School of Medicine, Johns Hopkins University, Baltimore, Maryland 21205, USA
| | - Yon Ju Ji
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland 21205, USA.,Department of Neuroscience, School of Medicine, Johns Hopkins University, Baltimore, Maryland 21205, USA
| | - Kenji Johnson
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland 21205, USA.,Department of Neuroscience, School of Medicine, Johns Hopkins University, Baltimore, Maryland 21205, USA
| | - Honghe Liu
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland 21205, USA.,Department of Neuroscience, School of Medicine, Johns Hopkins University, Baltimore, Maryland 21205, USA
| | - Kaitlin Johnson
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland 21205, USA
| | - Scott Bailey
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland 21205, USA
| | - Yongwon Suk
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland 21205, USA.,Department of Neuroscience, School of Medicine, Johns Hopkins University, Baltimore, Maryland 21205, USA
| | - Yu-Ning Lu
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland 21205, USA.,Department of Neuroscience, School of Medicine, Johns Hopkins University, Baltimore, Maryland 21205, USA
| | - Mingming Liu
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland 21205, USA.,Department of Neuroscience, School of Medicine, Johns Hopkins University, Baltimore, Maryland 21205, USA
| | - Jiou Wang
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland 21205, USA.,Department of Neuroscience, School of Medicine, Johns Hopkins University, Baltimore, Maryland 21205, USA
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16
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Ji YJ, An YF, Xue JM, Li QF, Hou R, Zhang YT, Qi XP, Li Q, Geng ZG, Cheng FL, Zhao CQ. [Analysis of clinical effect of unilateral vidian neurectomy following endoscopic trans-sphenoethmoidal recess approach for allergic rhinitis treatment]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2018; 32:1455-1458. [PMID: 30550186 DOI: 10.13201/j.issn.1001-1781.2018.19.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 08/18/2018] [Indexed: 11/12/2022]
Abstract
Objective: To explore the clinical efficacy of unilateral vidian neurectomy following endoscopic trans-sphenoethmoidal recess approach in treating allergic rhinitis.Method: The clinical data of 80 patients with moderate-severe allergic rhinitis who underwent unilateral vidian neurectomy following endoscopic trans-sphenoethmoidal recess approach were reviewed retrospectively. Visual analogue scale(VAS) was used to assess total symptom scores and nasal symptoms including nasal itching, nasal sneezing, rhinorrhea and nasal congestion. The paired T test was used to compare the scores between surgical side and control side. Twenty-four patients with 3 years of follow-up were assessed by analysis of variance with comparison of means between multiple groups. Further comparison between any two means was performed by LSD-t test. Result: A total of 80 patients were followed up for one year, with 51 patients for two years and 24 patients for three years. Among 24 patients, total symptom scores and nasal symptoms (nasal itching, nasal sneezing, rhinorrhea and nasal congestion) at pre-operation, 1 year,2 year and 3 year after operation were compared between surgical side and control side. There was no significant difference by the paired T test(P>0.05),but there was statically significant by analysis of variance(P<0.05) .The analysis of LSD-t test showed significant differences between pre-operative time point and each of the three time points after operation (P<0.05). Conclusion:The unilateral vidian neurectomy following endoscopic trans-sphenoethmoidal recess approach is an safe and effective technique in the management of moderate severe allergic rhinitis,and unilateral surgery could relieve bilateral nasal symptoms.
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Affiliation(s)
- Y J Ji
- Department of Otolaryngology Head and Neck Surgery, Second Hospital of Shanxi Medical University, Taiyuan, 030001, China
| | - Y F An
- Department of Otolaryngology Head and Neck Surgery, Second Hospital of Shanxi Medical University, Taiyuan, 030001, China
| | - J M Xue
- Department of Otolaryngology Head and Neck Surgery, Second Hospital of Shanxi Medical University, Taiyuan, 030001, China
| | - Q F Li
- Department of Otolaryngology Head and Neck Surgery, Second Hospital of Shanxi Medical University, Taiyuan, 030001, China
| | - R Hou
- Department of Otolaryngology Head and Neck Surgery, Second Hospital of Shanxi Medical University, Taiyuan, 030001, China
| | - Y T Zhang
- Department of Otolaryngology Head and Neck Surgery, Second Hospital of Shanxi Medical University, Taiyuan, 030001, China
| | - X P Qi
- Department of Otolaryngology Head and Neck Surgery, Second Hospital of Shanxi Medical University, Taiyuan, 030001, China
| | - Q Li
- Department of Otolaryngology Head and Neck Surgery, Second Hospital of Shanxi Medical University, Taiyuan, 030001, China
| | - Z G Geng
- Department of Otolaryngology Head and Neck Surgery, Second Hospital of Shanxi Medical University, Taiyuan, 030001, China
| | - F L Cheng
- Department of Otolaryngology Head and Neck Surgery, Second Hospital of Shanxi Medical University, Taiyuan, 030001, China
| | - C Q Zhao
- Department of Otolaryngology Head and Neck Surgery, Second Hospital of Shanxi Medical University, Taiyuan, 030001, China
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17
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Abstract
A genetic mutation in the C9orf72 gene causes the most common forms of neurodegenerative diseases amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD). The C9orf72 protein, predicted to be a DENN-family protein, is reduced in ALS and FTD, but its functions remain poorly understood. Using a 3110043O21Rik/C9orf72 knockout mouse model, as well as cellular analysis, we have found that loss of C9orf72 causes alterations in the signaling states of central autophagy regulators. In particular, C9orf72 depletion leads to reduced activity of MTOR, a negative regulator of macroautophagy/autophagy, and concomitantly increased TFEB levels and nuclear translocation. Consistent with these alterations, cells exhibit enlarged lysosomal compartments and enhanced autophagic flux. Loss of the C9orf72 interaction partner SMCR8 results in similar phenotypes. Our findings suggest that C9orf72 functions as a potent negative regulator of autophagy, with a central role in coupling the cellular metabolic state with autophagy regulation. We thus propose C9orf72 as a fundamental component of autophagy signaling with implications in basic cell physiology and pathophysiology, including neurodegeneration.
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Affiliation(s)
- Yon Ju Ji
- a Department of Biochemistry and Molecular Biology , Bloomberg School of Public Health, Johns Hopkins University , Baltimore , MD USA.,b Department of Neuroscience , School of Medicine, Johns Hopkins University , Baltimore , MD USA
| | - Janet Ugolino
- a Department of Biochemistry and Molecular Biology , Bloomberg School of Public Health, Johns Hopkins University , Baltimore , MD USA.,b Department of Neuroscience , School of Medicine, Johns Hopkins University , Baltimore , MD USA
| | - Nathan Ryan Brady
- c Department of Molecular Microbiology and Immunology , Bloomberg School of Public Health, Johns Hopkins University , Baltimore , MD USA
| | - Anne Hamacher-Brady
- a Department of Biochemistry and Molecular Biology , Bloomberg School of Public Health, Johns Hopkins University , Baltimore , MD USA.,c Department of Molecular Microbiology and Immunology , Bloomberg School of Public Health, Johns Hopkins University , Baltimore , MD USA
| | - Jiou Wang
- a Department of Biochemistry and Molecular Biology , Bloomberg School of Public Health, Johns Hopkins University , Baltimore , MD USA.,b Department of Neuroscience , School of Medicine, Johns Hopkins University , Baltimore , MD USA
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18
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Qi XP, Ji YJ, Zhao CQ, Li Q. [A case report of recurrent mental cell lymphoma involving tonsils]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2017; 52:544-546. [PMID: 28728248 DOI: 10.3760/cma.j.issn.1673-0860.2017.07.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- X P Qi
- Department of Otorhinolaryngology Head and Neck Surgery, Second Hospital of Shanxi Medical University, Taiyuan 030003, China
| | - Y J Ji
- Department of Otorhinolaryngology Head and Neck Surgery, Second Hospital of Shanxi Medical University, Taiyuan 030003, China
| | - C Q Zhao
- Department of Otorhinolaryngology Head and Neck Surgery, Second Hospital of Shanxi Medical University, Taiyuan 030003, China
| | - Q Li
- Department of Otorhinolaryngology Head and Neck Surgery, Second Hospital of Shanxi Medical University, Taiyuan 030003, China
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19
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Ugolino J, Ji YJ, Conchina K, Chu J, Nirujogi RS, Pandey A, Brady NR, Hamacher-Brady A, Wang J. Loss of C9orf72 Enhances Autophagic Activity via Deregulated mTOR and TFEB Signaling. PLoS Genet 2016; 12:e1006443. [PMID: 27875531 PMCID: PMC5119725 DOI: 10.1371/journal.pgen.1006443] [Citation(s) in RCA: 127] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2016] [Accepted: 10/21/2016] [Indexed: 12/13/2022] Open
Abstract
The most common cause of the neurodegenerative diseases amyotrophic lateral sclerosis and frontotemporal dementia is a hexanucleotide repeat expansion in C9orf72. Here we report a study of the C9orf72 protein by examining the consequences of loss of C9orf72 functions. Deletion of one or both alleles of the C9orf72 gene in mice causes age-dependent lethality phenotypes. We demonstrate that C9orf72 regulates nutrient sensing as the loss of C9orf72 decreases phosphorylation of the mTOR substrate S6K1. The transcription factor EB (TFEB), a master regulator of lysosomal and autophagy genes, which is negatively regulated by mTOR, is substantially up-regulated in C9orf72 loss-of-function animal and cellular models. Consistent with reduced mTOR activity and increased TFEB levels, loss of C9orf72 enhances autophagic flux, suggesting that C9orf72 is a negative regulator of autophagy. We identified a protein complex consisting of C9orf72 and SMCR8, both of which are homologous to DENN-like proteins. The depletion of C9orf72 or SMCR8 leads to significant down-regulation of each other’s protein level. Loss of SMCR8 alters mTOR signaling and autophagy. These results demonstrate that the C9orf72-SMCR8 protein complex functions in the regulation of metabolism and provide evidence that loss of C9orf72 function may contribute to the pathogenesis of relevant diseases. C9orf72 is one of many uncharacterized genes in the human genome. The presence of repeated nucleotides in the non-coding region of the C9orf72 gene (GGGGCC) has been linked to the neurodegenerative diseases Amyotrophic Lateral Sclerosis (ALS) and Frontotemporal dementia (FTD). However, how the presence of these repeats in the gene leads to neurodegeneration is unknown. One possible explanation is that the repeats lead to a reduced expression of the C9orf72 gene and loss of function of the C9orf72 protein. Although C9orf72 is well-conserved among multi-cellular organisms, its protein function remains to be determined. In this study, we demonstrated that loss of C9orf72 reduces mTOR signaling and enhances autophagy. mTOR signaling and autophagy are important for the cellular maintenance of metabolic balances, especially under stress conditions. C9orf72 protein exists in a complex with another DENN-like protein, SMCR8, which also regulates mTOR signaling and autophagy. We generated mice lacking C9orf72, which died prematurely and showed dramatic upregulation of TFEB, a crucial transcriptional regulator of autophagy and lysosomal genes, that integrates mTOR activity state and autophagic capacity. We propose that C9orf72 function is important for metabolic control and its deficiency can contribute to the development of neurodegenerative diseases.
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Affiliation(s)
- Janet Ugolino
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, and Department of Neuroscience, School of Medicine, Johns Hopkins University, Baltimore, Maryland, United States of America
| | - Yon Ju Ji
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, and Department of Neuroscience, School of Medicine, Johns Hopkins University, Baltimore, Maryland, United States of America
| | - Karen Conchina
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, and Department of Neuroscience, School of Medicine, Johns Hopkins University, Baltimore, Maryland, United States of America
| | - Justin Chu
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, and Department of Neuroscience, School of Medicine, Johns Hopkins University, Baltimore, Maryland, United States of America
| | - Raja Sekhar Nirujogi
- McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University, School of Medicine, Baltimore, Maryland, United States of America
| | - Akhilesh Pandey
- McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University, School of Medicine, Baltimore, Maryland, United States of America
| | - Nathan R. Brady
- Department of Molecular Microbiology and Immunology, Bloomberg School of Public Health, Johns Hopkins University, Maryland, United States of America
| | - Anne Hamacher-Brady
- Department of Molecular Microbiology and Immunology, Bloomberg School of Public Health, Johns Hopkins University, Maryland, United States of America
| | - Jiou Wang
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, and Department of Neuroscience, School of Medicine, Johns Hopkins University, Baltimore, Maryland, United States of America
- * E-mail:
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20
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Cho HJ, Hwang YS, Mood K, Ji YJ, Lim J, Morrison DK, Daar IO. EphrinB1 interacts with CNK1 and promotes cell migration through c-Jun N-terminal kinase (JNK) activation. J Biol Chem 2014; 289:18556-68. [PMID: 24825906 DOI: 10.1074/jbc.m114.558809] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
The Eph receptors and their membrane-bound ligands, ephrins, play important roles in various biological processes such as cell adhesion and movement. The transmembrane ephrinBs transduce reverse signaling in a tyrosine phosphorylation-dependent or -independent, as well as PDZ-dependent manner. Here, we show that ephrinB1 interacts with Connector Enhancer of KSR1 (CNK1) in an EphB receptor-independent manner. In cultured cells, cotransfection of ephrinB1 with CNK1 increases JNK phosphorylation. EphrinB1/CNK1-mediated JNK activation is reduced by overexpression of dominant-negative RhoA. Overexpression of CNK1 alone is sufficient for activation of RhoA; however, both ephrinB1 and CNK1 are required for JNK phosphorylation. Co-immunoprecipitation data showed that ephrinB1 and CNK1 act as scaffold proteins that connect RhoA and JNK signaling components, such as p115RhoGEF and MKK4. Furthermore, adhesion to fibronectin or active Src overexpression increases ephrinB1/CNK1 binding, whereas blocking Src activity by a pharmacological inhibitor decreases not only ephrinB1/CNK1 binding, but also JNK activation. EphrinB1 overexpression increases cell motility, however, CNK1 depletion by siRNA abrogates ephrinB1-mediated cell migration and JNK activation. Moreover, Rho kinase inhibitor or JNK inhibitor treatment suppresses ephrinB1-mediated cell migration. Taken together, our findings suggest that CNK1 is required for ephrinB1-induced JNK activation and cell migration.
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Affiliation(s)
- Hee Jun Cho
- From the Laboratory of Cell and Developmental Signaling, National Cancer Institute-Frederick, National Institutes of Health, Frederick, Maryland 21702
| | - Yoo-Seok Hwang
- From the Laboratory of Cell and Developmental Signaling, National Cancer Institute-Frederick, National Institutes of Health, Frederick, Maryland 21702
| | - Kathleen Mood
- From the Laboratory of Cell and Developmental Signaling, National Cancer Institute-Frederick, National Institutes of Health, Frederick, Maryland 21702
| | - Yon Ju Ji
- From the Laboratory of Cell and Developmental Signaling, National Cancer Institute-Frederick, National Institutes of Health, Frederick, Maryland 21702
| | - Junghwa Lim
- From the Laboratory of Cell and Developmental Signaling, National Cancer Institute-Frederick, National Institutes of Health, Frederick, Maryland 21702
| | - Deborah K Morrison
- From the Laboratory of Cell and Developmental Signaling, National Cancer Institute-Frederick, National Institutes of Health, Frederick, Maryland 21702
| | - Ira O Daar
- From the Laboratory of Cell and Developmental Signaling, National Cancer Institute-Frederick, National Institutes of Health, Frederick, Maryland 21702
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21
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Ji YJ, Hwang YS, Mood K, Cho HJ, Lee HS, Winterbottom E, Cousin H, Daar IO. EphrinB2 affects apical constriction in Xenopus embryos and is regulated by ADAM10 and flotillin-1. Nat Commun 2014; 5:3516. [PMID: 24662724 PMCID: PMC4120273 DOI: 10.1038/ncomms4516] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2013] [Accepted: 02/26/2014] [Indexed: 01/19/2023] Open
Abstract
The Eph/ephrin signaling pathways have a critical function in cell adhesion and repulsion, and thus play key roles in various morphogenetic events during development. Here we show that a decrease in ephrinB2 protein causes neural tube closure defects during Xenopus laevis embryogenesis. Such a decrease in ephrinB2 protein levels is observed upon the loss of flotillin-1 scaffold protein, a newly identified ephrinB2-binding partner. This dramatic decline in ephrinB2 protein levels upon the absence of flotillin-1 expression is specific, and is partly the result of an increased susceptibility to cleavage by the metalloprotease ADAM10. These findings indicate that flotillin-1 regulates ephrinB2 protein levels through ADAM10, and is required for appropriate neural tube morphogenesis in the Xenopus embryo.
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Affiliation(s)
- Yon Ju Ji
- Laboratory of Cell and Developmental Signaling, National Cancer Institute-Frederick, Frederick, Maryland 21702, USA
| | - Yoo-Seok Hwang
- Laboratory of Cell and Developmental Signaling, National Cancer Institute-Frederick, Frederick, Maryland 21702, USA
| | - Kathleen Mood
- Laboratory of Cell and Developmental Signaling, National Cancer Institute-Frederick, Frederick, Maryland 21702, USA
| | - Hee-Jun Cho
- Laboratory of Cell and Developmental Signaling, National Cancer Institute-Frederick, Frederick, Maryland 21702, USA
| | - Hyun-Shik Lee
- ABRC, CMRI, School of Life Sciences, College of Natural Sciences, Kyungpook National University, Daegu 702-701, South Korea
| | - Emily Winterbottom
- Laboratory of Cell and Developmental Signaling, National Cancer Institute-Frederick, Frederick, Maryland 21702, USA
| | - Hélène Cousin
- Department of Veterinary and Animal Sciences, University of Massachusetts, Amherst, Massachusetts 01003, USA
| | - Ira O Daar
- Laboratory of Cell and Developmental Signaling, National Cancer Institute-Frederick, Frederick, Maryland 21702, USA
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22
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Hwang YS, Lee HS, Kamata T, Mood K, Cho HJ, Winterbottom E, Ji YJ, Singh A, Daar IO. The Smurf ubiquitin ligases regulate tissue separation via antagonistic interactions with ephrinB1. Genes Dev 2013; 27:491-503. [PMID: 23475958 DOI: 10.1101/gad.208355.112] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The formation of tissue boundaries is dependent on the cell-cell adhesion/repulsion system that is required for normal morphogenetic processes during development. The Smad ubiquitin regulatory factors (Smurfs) are E3 ubiquitin ligases with established roles in cell growth and differentiation, but whose roles in regulating cell adhesion and migration are just beginning to emerge. Here, we demonstrate that the Smurfs regulate tissue separation at mesoderm/ectoderm boundaries through antagonistic interactions with ephrinB1, an Eph receptor ligand that has a key role in regulating the separation of embryonic germ layers. EphrinB1 is targeted by Smurf2 for degradation; however, a Smurf1 interaction with ephrinB1 prevents the association with Smurf2 and precludes ephrinB1 from ubiquitination and degradation, since it is a substantially weaker substrate for Smurf1. Inhibition of Smurf1 expression in embryonic mesoderm results in loss of ephrinB1-mediated separation of this tissue from the ectoderm, which can be rescued by the coincident inhibition of Smurf2 expression. This system of differential interactions between Smurfs and ephrinB1 regulates the maintenance of tissue boundaries through the control of ephrinB protein levels.
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Affiliation(s)
- Yoo-Seok Hwang
- Laboratory of Cell and Developmental Signaling, National Cancer Institute-Frederick, Frederick, MD 21702, USA
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23
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Singh A, Winterbottom EF, Ji YJ, Hwang YS, Daar IO. Abelson interactor 1 (ABI1) and its interaction with Wiskott-Aldrich syndrome protein (wasp) are critical for proper eye formation in Xenopus embryos. J Biol Chem 2013; 288:14135-14146. [PMID: 23558677 DOI: 10.1074/jbc.m112.445643] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Abl interactor 1 (Abi1) is a scaffold protein that plays a central role in the regulation of actin cytoskeleton dynamics as a constituent of several key protein complexes, and homozygous loss of this protein leads to embryonic lethality in mice. Because this scaffold protein has been shown in cultured cells to be a critical component of pathways controlling cell migration and actin regulation at cell-cell contacts, we were interested to investigate the in vivo role of Abi1 in morphogenesis during the development of Xenopus embryos. Using morpholino-mediated translation inhibition, we demonstrate that knockdown of Abi1 in the whole embryo, or specifically in eye field progenitor cells, leads to disruption of eye morphogenesis. Moreover, signaling through the Src homology 3 domain of Abi1 is critical for proper movement of retinal progenitor cells into the eye field and their appropriate differentiation, and this process is dependent upon an interaction with the nucleation-promoting factor Wasp (Wiskott-Aldrich syndrome protein). Collectively, our data demonstrate that the Abi1 scaffold protein is an essential regulator of cell movement processes required for normal eye development in Xenopus embryos and specifically requires an Src homology 3 domain-dependent interaction with Wasp to regulate this complex morphogenetic process.
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Affiliation(s)
- Arvinder Singh
- Laboratory of Cell and Developmental Signaling, NCI-Frederick, National Institutes of Health, Frederick, Maryland 21702
| | - Emily F Winterbottom
- Laboratory of Cell and Developmental Signaling, NCI-Frederick, National Institutes of Health, Frederick, Maryland 21702
| | - Yon Ju Ji
- Laboratory of Cell and Developmental Signaling, NCI-Frederick, National Institutes of Health, Frederick, Maryland 21702
| | - Yoo-Seok Hwang
- Laboratory of Cell and Developmental Signaling, NCI-Frederick, National Institutes of Health, Frederick, Maryland 21702
| | - Ira O Daar
- Laboratory of Cell and Developmental Signaling, NCI-Frederick, National Institutes of Health, Frederick, Maryland 21702.
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24
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Jee C, Choi TW, Kalichamy K, Yee JZ, Song HO, Ji YJ, Lee J, Lee JI, L'Etoile ND, Ahnn J, Lee SK. CNP-1 (ARRD-17), a novel substrate of calcineurin, is critical for modulation of egg-laying and locomotion in response to food and lysine sensation in Caenorhabditis elegans. J Mol Biol 2012; 417:165-78. [PMID: 22300764 DOI: 10.1016/j.jmb.2012.01.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2010] [Revised: 12/19/2011] [Accepted: 01/13/2012] [Indexed: 10/14/2022]
Abstract
Calcineurin is a Ca(2+)/calmodulin-dependent protein phosphatase involved in calcium signaling pathways. In Caenorhabditis elegans, the loss of calcineurin activity causes pleiotropic defects including hyperadaptation of sensory neurons, hypersensation to thermal difference and hyper-egg-laying when worms are refed after starvation. In this study, we report on arrd-17 as calcineurin-interacting protein-1 (cnp-1), which is a novel molecular target of calcineurin. CNP-1 interacts with the catalytic domain of the C. elegans calcineurin A subunit, TAX-6, in a yeast two-hybrid assay and is dephosphorylated by TAX-6 in vitro. cnp-1 is expressed in ASK, ADL, ASH and ASJ sensory neurons as TAX-6. It acts downstream of tax-6 in regulation of locomotion and egg-laying after starvation, ASH sensory neuron adaptation and lysine chemotaxis, that is known to be mediated by ASK neurons. Altogether, our biochemical and genetic evidence indicates that CNP-1 is a direct target of calcineurin and required in stimulated egg-laying and locomotion after starvation, adaptation to hyperosmolarity and attraction to lysine, which is modulated by calcineurin. We suggest that the phosphorylation status of CNP-1 plays an important role in regulation of refed stimulating behaviors after starvation and attraction to amino acid, which provides valuable nutritious information.
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Affiliation(s)
- Changhoon Jee
- Department of Life Science, Gwangju Institute of Science and Technology, Gwangju 500-712, Korea
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25
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Song HO, Lee J, Ji YJ, Dwivedi M, Cho JH, Park BJ, Ahnn J. Calcineurin regulates coelomocyte endocytosis via DYN-1 and CUP-4 in Caenorhabditis elegans. Mol Cells 2010; 30:255-62. [PMID: 20803083 DOI: 10.1007/s10059-010-0116-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2010] [Revised: 05/30/2010] [Accepted: 06/01/2010] [Indexed: 12/31/2022] Open
Abstract
C. elegans coelomocytes are macrophage-like scavenger cells that provide an excellent in vivo system for the study of clathrin-mediated endocytosis. Using this in vivo system, several genes involved in coelomocyte endocytosis have been identified previously. However, the detailed mechanism of endocytic pathway is still unknown. Here, we report a new function of calcineurin, an evolutionarily conserved Ca(2+)/calmodulin-dependent Ser/Thr protein phosphatase, in coelomocyte endocytosis. We found that calcineurin mutants show defective coelomocyte endocytosis. Genetic analysis suggests that calcineurin and a GTPase, dynamin (DYN-1), may function upstream of an orphan receptor, CUP-4, to regulate endocytosis. Therefore, we propose a model in which calcineurin may regulate coelomocyte endocytosis via DYN-1 and CUP-4 in C. elegans.
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Affiliation(s)
- Hyun-Ok Song
- Department of Life Science, College of Natural Sciences, Hanyang University, Seoul, 133-791, Korea
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Lee HS, Mood K, Battu G, Ji YJ, Singh A, Daar IO. Fibroblast growth factor receptor-induced phosphorylation of ephrinB1 modulates its interaction with Dishevelled. Mol Biol Cell 2009; 20:124-33. [PMID: 19005214 PMCID: PMC2613129 DOI: 10.1091/mbc.e08-06-0662] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2008] [Revised: 10/03/2008] [Accepted: 10/31/2008] [Indexed: 11/11/2022] Open
Abstract
The Eph family of receptor tyrosine kinases and their membrane-bound ligands, the ephrins, have been implicated in regulating cell adhesion and migration during development by mediating cell-to-cell signaling events. The transmembrane ephrinB1 protein is a bidirectional signaling molecule that signals through its cytoplasmic domain to promote cellular movements into the eye field, whereas activation of the fibroblast growth factor receptor (FGFR) represses these movements and retinal fate. In Xenopus embryos, ephrinB1 plays a role in retinal progenitor cell movement into the eye field through an interaction with the scaffold protein Dishevelled (Dsh). However, the mechanism by which the FGFR may regulate this cell movement is unknown. Here, we present evidence that FGFR-induced repression of retinal fate is dependent upon phosphorylation within the intracellular domain of ephrinB1. We demonstrate that phosphorylation of tyrosines 324 and 325 disrupts the ephrinB1/Dsh interaction, thus modulating retinal progenitor movement that is dependent on the planar cell polarity pathway. These results provide mechanistic insight into how fibroblast growth factor signaling modulates ephrinB1 control of retinal progenitor movement within the eye field.
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Affiliation(s)
- Hyun-Shik Lee
- Laboratory of Cell and Developmental Signaling, National Cancer Institute-Frederick, Frederick, MD 21702
| | - Kathleen Mood
- Laboratory of Cell and Developmental Signaling, National Cancer Institute-Frederick, Frederick, MD 21702
| | - Gopala Battu
- Laboratory of Cell and Developmental Signaling, National Cancer Institute-Frederick, Frederick, MD 21702
| | - Yon Ju Ji
- Laboratory of Cell and Developmental Signaling, National Cancer Institute-Frederick, Frederick, MD 21702
| | - Arvinder Singh
- Laboratory of Cell and Developmental Signaling, National Cancer Institute-Frederick, Frederick, MD 21702
| | - Ira O. Daar
- Laboratory of Cell and Developmental Signaling, National Cancer Institute-Frederick, Frederick, MD 21702
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27
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Abstract
RUNXs are important transcription factors, which are involved in animal development and human carcinogenesis. RNT-1, the only homologue of RUNXs, in Caenorhabditis elegans (C. elegans) has been identified and viable mutant animals of rnt-1 gene have been isolated and characterized recently. Genetic analyses using rnt-1 mutants have shown that RNT-1 is regulated by TGFbeta- and Wnt-signaling pathways in the body size regulation and male tail development. Here, we review our current understanding of RNT-1 functions in these signaling pathways. Furthermore, future prospects of RNT-1 and BRO-1 studies in C. elegans are discussed in this review.
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Affiliation(s)
- Yon Ju Ji
- Department of Life Science, Gwangju Institute of Science and Technology, Puk-gu, Gwangju 500-712, Korea
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28
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Singaravelu G, Song HO, Ji YJ, Jee C, Park BJ, Ahnn J. Calcineurin interacts with KIN-29, a Ser/Thr kinase, in Caenorhabditis elegans. Biochem Biophys Res Commun 2006; 352:29-35. [PMID: 17113567 DOI: 10.1016/j.bbrc.2006.10.120] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2006] [Accepted: 10/23/2006] [Indexed: 10/23/2022]
Abstract
Calcineurin is a Ca2+/Calmodulin activated Ser/Thr phosphatase that is well conserved from yeast to human. In Caenorhabditis elegans, tax-6 and cnb-1 encode catalytic and regulatory subunits of calcineurin, respectively. We performed yeast two-hybrid screening using TAX-6 as a bait to identify calcineurin interacting proteins. KIN-29 is one of proteins that specifically interacted with TAX-6. KIN-29 is a Ser/Thr kinase previously shown to be involved in regulating gene expression of a subset of chemoreceptors in specific neurons. Both TAX-6 and KIN-29 are expressed in hypodermis, muscles, and neurons. Moreover, both calcineurin and kin-29 mutants exhibit similar phenotypes, namely small body size, small brood size, and slow growth. Here we describe specific genetic interaction between tax-6 and kin-29 in regulating body size, serotonin mediated egg laying, and chemoreceptor expression.
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Ji YJ, Choi KY, Song HO, Park BJ, Yu JR, Kagawa H, Song WK, Ahnn J. VHA-8, the E subunit of V-ATPase, is essential for pH homeostasis and larval development in C. elegans. FEBS Lett 2006; 580:3161-6. [PMID: 16684534 DOI: 10.1016/j.febslet.2006.04.067] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2006] [Revised: 03/08/2006] [Accepted: 04/24/2006] [Indexed: 11/19/2022]
Abstract
Vacuolar H+-ATPase (V-ATPase) is an ATP-dependent proton pump, which transports protons across the membrane. It is a multi-protein complex which is composed of at least 13 subunits. The Caenorhabditis elegans vha-8 encodes the E subunit of V-ATPase which is expressed in the hypodermis, intestine and H-shaped excretory cells. VHA-8 is necessary for proper intestinal function likely through its role in cellular acidification of intestinal cells. The null mutants of vha-8 show a larval lethal phenotype indicating that vha-8 is an essential gene for larval development in C. elegans. Interestingly, characteristics of necrotic cell death were observed in the hypodermis and intestine of the arrested larvae suggesting that pH homeostasis via the E subunit of V-ATPase is required for the cell survival in C. elegans.
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Affiliation(s)
- Yon Ju Ji
- Department of Life Science, Gwangju Institute of Science and Technology, Oryong 1, Puk-gu, Gwangju 500-712, South Korea
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30
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Choi KY, Ji YJ, Dhakal BK, Yu JR, Cho C, Song WK, Ahnn J. Vacuolar-type H+-ATPase E subunit is required for embryogenesis and yolk transfer in Caenorhabditis elegans. Gene 2003; 311:13-23. [PMID: 12853134 DOI: 10.1016/s0378-1119(03)00561-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Vacuolar H(+)-ATPases (V-ATPases) are ATP-dependent proton pumps localized at membranes of intracellular acidic organelles and plasma membranes of various cell types. By virtue of its regulation in acidification, V-ATPase is required for many intracellular processes such as receptor-mediated endocytosis and protein sorting. Here we report the molecular characterization of the E subunit of V-ATPase in Caenorhabditis elegans. This subunit is one of the most well conserved subunits sharing approximately 57% identity with the human homologue, ATP6E. Green fluorescent protein (GFP) and whole-mount immunostaining analyses showed that V-ATPase E subunit (vha-8) is abundantly expressed in the H-shaped excretory cell, consistent with the expression patterns observed for other V-ATPase subunits. Double-stranded RNAs (or RNAi) targeted to vha-8 resulted in embryonic and larval lethality for the first filial generation, indicating that vha-8 is essential during early developmental processes. In addition, accumulation of abnormal endomitotic oocytes and defects in receptor-mediated endocytosis were observed in parental animals. These findings suggest that multiple phenotypes caused by the disruption of pH homeostasis are due to the defective V-ATPase. In summary, vha-8 encoding the E subunit of V-ATPase in C. elegans is essential for embryogenesis and receptor-mediated endocytosis.
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Affiliation(s)
- Kyu Yeong Choi
- Department of Life Science, Kwangju Institute of Science and Technology (K-JIST), Kwangju 500-712, South Korea
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31
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Choi KY, Ji YJ, Jee C, Kim DH, Ahnn J. Characterization of CeHDA-7, a class II histone deacetylase interacting with MEF-2 in Caenorhabditis elegans. Biochem Biophys Res Commun 2002; 293:1295-300. [PMID: 12054517 DOI: 10.1016/s0006-291x(02)00374-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
As a result of screen searching for proteins interacting with MEF-2 transcription factor, we have identified the hda-7 gene in Caenorhabditis elegans. The hda-7 locus encodes a class II histone deacetylase containing a highly conserved catalytic domain. C. elegans HDA-7 protein translated in vitro demonstrated a direct interaction with CeMEF-2, as shown in other organisms. CeHDA-7 is abundantly expressed in body-wall muscle cells, neurons, and hypodermal seam cells, similar to CeMEF-2 expression patterns. Consistent with previously known phenotypes observed in mef-2 deletion mutants [Dev. Biol. 223 (2000) 431], RNA interference targeted for hda-7 did not result in muscle function or developmental defects.
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Affiliation(s)
- Kyu Yeong Choi
- Department of Life Science, Kwangju Institute of Science and Technology, Kwangju 500-712, Republic of Korea
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Chen Y, Ji YJ, Roxby R, Conrad C. In vivo expression of single-stranded DNA in mammalian cells with DNA enzyme sequences targeted to C-raf. Antisense Nucleic Acid Drug Dev 2000; 10:415-22. [PMID: 11198925 DOI: 10.1089/oli.1.2000.10.415] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The use of antisense oligodeoxynucleotides (AS-ODN) remains a viable method to downregulate selected gene function. However, limitations to the antisense approach remain, such as (1) difficulties in delivery of the AS-ODN into target tissues, (2) instability of AS-ODN in vivo, (3) uncertanties about the precise mode of action, and (4) toxic effects in animal and human studies. To circumvent some of these difficulties, we designed a vector set that directs the in vivo production of single-stranded DNA (ssDNA) of a desired target sequence with limited extraneous vector nucleotide sequences. One plasmid was designed to express Moloney murine leukemia virus (MoMuLV) reverse transcriptase (RT). Another expression plasmid contains the MoMuLV primer binding site at the 3'-end of its RNA transcript so that an ssDNA would be synthesized by RT when both plasmids are cotransfected into cells. To test this expression system, we constructed a plasmid set, pssXA/pssXB that produces ssRNA-cleaving DNA 10-23 enzyme (Santoro, S.W., and Joyce, G.F. [1997]. Proc. Natl. Acad. Sci. USA 37, 13330-13342). The DNA enzyme sequence was placed between two oligonucleotide arms that are complementary and able to specifically target C-raf kinase mRNA. These plasmids were transfected into the A549 lung carcinoma cell line. Reduced C-raf mRNA levels by up to 34%-36%, as determined by Northern blot analysis, were observed in the transfected cells. Our results demonstrate the feasibility of using this novel ssDNA expression system to generate any sequence of interest in vivo for antisense, RNA-cleavage DNA enzyme, or triplex-forming strategies.
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Affiliation(s)
- Y Chen
- InGene, Inc., Kansas City, MO 64108, USA
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Ji YJ, Xiao B, Wang ZH, Cui MZ, Lu YY. The suppression effect of light rare earth elements on proliferation of two cancer cell lines. Biomed Environ Sci 2000; 13:287-292. [PMID: 11351862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
To study the suppression effect of light rare earth elements (RE) on proliferation of two cancer cell lines. Two cancer cell lines PAMC82 and K562 were used to examine their colony-forming ability in soft agar, microtubule structure, calmodulin levels and regulation of some gene expressions by Northern blot analysis with and without treatment by RE. The results showed that on soft agar culture the colony-forming ability of human gastric cancer cell line PAMC82 treated by RE chloride decreased and the PAMC82 cell microtubule abnormal structure became normal. The calmodulin (CaM) levels decreased in human leukemia cells (K562) treated with cerium chloride and neodymium chloride. The Northern blot analysis revealed marked up-regulation of p53, p16(MTS1), p21 (WAF1) gene expressions in PAMC82 cells treated with lanthanum chloride and cerium chloride, as compared to control PAMC82 cells. The light rare earth elements studied have certain suppression effects on proliferation of cancer cells. This effect might be related to the decrease of calmodulin and up-regulation of some gene expressions in cancer cells.
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Affiliation(s)
- Y J Ji
- Beijing Institute of Labor Hygiene and Occupational Diseases, Beijing 100020, China
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34
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Ji YJ. [Preventive inoculation against rabies]. Zhonghua Hu Li Za Zhi 1986; 21:214. [PMID: 3639788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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