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Yuan Y, Tan H, Chen H, Zhang J, Shi F, Wang M, Zhang G, Wang H, Dong R. Peroxiredoxin 1 alleviates oxygen-glucose deprivation/ reoxygenation injury in N2a cells via suppressing the JNK/caspase-3 pathway. Iran J Basic Med Sci 2023; 26:1305-1312. [PMID: 37886002 PMCID: PMC10598809 DOI: 10.22038/ijbms.2023.71390.15528] [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] [Figures] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Accepted: 05/30/2023] [Indexed: 10/28/2023]
Abstract
Objectives Cerebral ischemia/reperfusion (I/R) injury inevitably aggravates the initial cerebral tissue damage following a stroke. Peroxiredoxin 1 (Prdx1) is a representative protein of the endogenous antioxidant enzyme family that regulates several reactive oxygen species (ROS)-dependent signaling pathways, whereas the JNK/caspase-3 proapoptotic pathway has a prominent role during cerebral I/R injury. This study aimed to examine the potential mechanism of Prdx1 in Neuro 2A (N2a) cells following oxygen-glucose deprivation and reoxygenation (OGD/R) injury. Materials and Methods N2a cells were exposed to OGD/R to simulate cerebral I/R injury. Prdx1 siRNA transfection and the JNK inhibitor (SP600125) were used to interfere with their relative expressions. CCK-8 assay, flow cytometry, and lactate dehydrogenase (LDH) assay were employed to determine the viability and apoptosis of N2a cells. The intracellular ROS content was assessed using ROS Assay Kit. Real-time quantitative reverse transcription polymerase chain reaction (qRT-PCR) and western blot analyses were conducted to detect the expression levels of Prdx1, JNK, phosphorylated JNK (p-JNK), and cleaved caspase-3. Results Firstly, Prdx1, p-JNK, and cleaved caspase-3 expression were significantly induced in OGD/R-exposed N2a cells. Secondly, the knockdown of Prdx1 inhibited cell viability and increased apoptosis rate, expression of p-JNK, and cleaved caspase-3 expression. Thirdly, SP600125 inhibited the JNK/caspase-3 signaling pathway and mitigated cell injury following OGD/R. Finally, SP600125 partially reversed Prdx1 down-regulation-mediated cleaved caspase-3 activation and OGD/R damage in N2a cells. Conclusion Prdx1 alleviates the injury to N2a cells induced by OGD/R via suppressing JNK/caspase-3 pathway, showing promise as a potential therapeutic for cerebral I/R injury.
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Affiliation(s)
- Yang Yuan
- Department of Anesthesiology, Qingdao Municipal Hospital, Qingdao, Shandong, China
| | - Hongchen Tan
- Malvern College Qingdao, Qingdao, Shandong, China
| | - Huailong Chen
- Department of Anesthesiology, Qingdao Eight People’s Hospital, Qingdao, Shandong, China
| | - Jiawen Zhang
- Department of Anesthesiology, Qingdao Clinical College Affiliated to Nanjing Medical University, Qingdao, Shandong, China
| | - Fei Shi
- Department of Anesthesiology, Qingdao Municipal Hospital, Qingdao, Shandong, China
| | - Mingshan Wang
- Department of Anesthesiology, Qingdao Municipal Hospital, Qingdao, Shandong, China
| | - Gaofeng Zhang
- Department of Anesthesiology, Qingdao Municipal Hospital, Qingdao, Shandong, China
| | - Haipeng Wang
- Department of Anesthesiology, Weifang No.2 People’s Hospital, Weifang, Shandong, China
| | - Rui Dong
- Department of Anesthesiology, Qingdao Municipal Hospital, Qingdao, Shandong, China
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Li D, Xu D, Zhang Y, Chen P, Xie J. Effect of Notch1 signaling on cellular proliferation and apoptosis in human laryngeal carcinoma. World J Surg Oncol 2022; 20:262. [PMID: 35982489 PMCID: PMC9389713 DOI: 10.1186/s12957-022-02728-6] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2022] [Accepted: 08/09/2022] [Indexed: 11/10/2022] Open
Abstract
Background The occurrence and development of malignancies include excessive proliferation and apoptosis resistance in tumor cells. This study aimed to identify the effects of Notch1 signaling on proliferation and apoptosis of laryngeal cancer cells in a hypoxic microenvironment. Methods Notch1 and Ki-67 expression in laryngeal squamous cell carcinoma (LSCC) tissues was detected by immunohistochemistry. The apoptotic index (AI) of LSCC was evaluated by the TUNEL method. Small interfering RNA (siRNA) was used to inhibit Notch1 expression in laryngeal cancer cells. Real-time PCR was used to measure Notch1, Hes1, and Hey1 mRNA expression, and Western blotting was used to measure Notch1 and Notch1 intracellular domain (N1ICD) protein expression. Annexin V-FITC/propidium iodide staining and Cell Counting Kit-8 assays were used to measure cell apoptosis and proliferation, respectively. Results Notch1 expression was significantly related to the proliferation index (PI) and AI in LSCC tissues. Hypoxia could induce proliferation and inhibit apoptosis in cancer cells. Notch1 expression and Notch1 signaling activity could be upregulated by hypoxia. Suppressing Notch1 signaling activity in hypoxic cells could decrease proliferation and increase apoptosis. Conclusions Our study has demonstrated that hypoxia may promote proliferation and inhibit apoptosis of laryngeal cancer cells. Notch1 signaling may play a pivotal role in regulating the proliferation and apoptosis resistance of laryngeal cancer cells under hypoxic conditions.
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Affiliation(s)
- Dawei Li
- Department of Otorhinolaryngology-Head & Neck Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine; Shanghai Jiaotong University School of Medicine Ear Institute; Shanghai Key Laboratory of Translational Medicine on Ear and Nose diseases, Shanghai, 200092, China
| | - Dan Xu
- Center for Translational Medicine, Yangpu Hospital, Tongji University School of Medicine, Shanghai, 200031, China
| | - Yifei Zhang
- Department of Otorhinolaryngology-Head & Neck Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine; Shanghai Jiaotong University School of Medicine Ear Institute; Shanghai Key Laboratory of Translational Medicine on Ear and Nose diseases, Shanghai, 200092, China
| | - Penghui Chen
- Department of Otorhinolaryngology-Head & Neck Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine; Shanghai Jiaotong University School of Medicine Ear Institute; Shanghai Key Laboratory of Translational Medicine on Ear and Nose diseases, Shanghai, 200092, China
| | - Jin Xie
- Department of Otorhinolaryngology-Head & Neck Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine; Shanghai Jiaotong University School of Medicine Ear Institute; Shanghai Key Laboratory of Translational Medicine on Ear and Nose diseases, Shanghai, 200092, China.
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Cao J, Shen Y, Yang Z, Pan B, Liu Z. Unique hypoxia-tolerant subpopulations of adipose-derived stem cells: ITGB3 + cells. J Plast Reconstr Aesthet Surg 2022; 75:3586-3594. [PMID: 35643597 DOI: 10.1016/j.bjps.2022.04.039] [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] [Received: 11/16/2021] [Revised: 02/26/2022] [Accepted: 04/12/2022] [Indexed: 11/17/2022]
Abstract
BACKGROUND We found by accident that stem cells could still be isolated from adipose tissue stored for 14 days in sealed tubes, which was distinct from previous protocols. The morphology of these hypoxia-tolerant stem cells also differs from that of conventional adipose-derived stem cells (ADSCs). In this study, we aim to define the newly found subsets. MATERIALS AND METHODS Stem cells were isolated from adipose tissue that was aspirated immediately or stored for 14 days. The stem cells were then harvested for flowcytometric analysis and differentiation potentials. The expression of hypoxia-inducible factor 1 alpha (HIF-1α) was assayed to confirm the hypoxia-tolerant ability. RNA sequencing (RNA-seq) was performed to find the common signatures of the hypoxia-tolerant cells. The result of bioinformatics was tested by quantitative real-time reverse transcription-polymerase chain reaction (qPCR) and western blotting. RESULTS Certain subsets of ADSCs can be isolated from adipose tissue stored for 14 days. These survived cells were positive for CD90, CD105, and CD73 and showed multilineage differentiation potentials. The hypoxic condition was evidenced by up-regulation of HIF-1α for 2.0-fold changes (p < 0.05). The hypoxia-tolerant stem cells were distinct from multilineage-differentiating stress-enduring (Muse) cells, previously found stress-enduring stromal cells. RNA-seq suggested that integrin beta 3 (ITGB3) was highly expressed in hypoxia-tolerant subpopulations. The result was further confirmed at transcription and translation levels by qPCR and western blotting (mRNA: 2.9 ± 0.4, p < 0.05; protein: 1.5 ± 0.2, p < 0.05; respectively). The conventional ADSCs are positive for ITGB3, which implies that ITGB3+ cells are subpopulations of heterogeneous ADSCs. CONCLUSIONS Our study reveals the ITGB3+ subsets with potent hypoxia tolerance, which has significant implications for improving fat retention rates and curing obesity-related diseases.
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Affiliation(s)
- Jiankun Cao
- Department of Burns and Plastic Surgery, Beijing Jishuitan Hospital, Forth Medical College of Peking University, Beijing, China; Plastic Surgery Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Yuming Shen
- Department of Burns and Plastic Surgery, Beijing Jishuitan Hospital, Forth Medical College of Peking University, Beijing, China
| | - Zhigang Yang
- Plastic Surgery Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Bo Pan
- Plastic Surgery Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.
| | - Zhenzhong Liu
- Department of Burns and Plastic Surgery, The Second Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong Province, China.
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Pérez Regalado S, León J, Feriche B. Therapeutic approach for digestive system cancers and potential implications of exercise under hypoxia condition: what little is known? a narrative review. J Cancer Res Clin Oncol 2022; 148:1107-1121. [PMID: 35157120 DOI: 10.1007/s00432-022-03918-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Accepted: 01/04/2022] [Indexed: 12/30/2022]
Abstract
BACKGROUND Cancer, like other chronic pathologies, is associated with the presence of hypoxic regions due to the uncontrolled cell growth. Under this pathological hypoxic condition, various molecular signaling pathways are activated to ensure cell survival, such as those that govern angiogenesis, erythropoiesis, among others. These molecular processes are very similar to the physiological response caused by exposure to altitude (natural hypobaric systemic hypoxia), the use of artificial hypoxia devices (systemic normobaric simulated hypoxia) or the delivery of vascular occlusion to the extremities (also called local hypoxia by the blood flow restriction technique). "Tumor hypoxia" has gained further clinical importance due to its crucial role in both tumor progression and resistance to treatment. However, the ability to manipulate this pathway through physical exercise and systemic hypoxia-mediated signaling pathways could offer an important range of therapeutic opportunities that should be further investigated. METHODS This review is focused on the potential implications of systemic hypoxia combined with exercise in digestive system neoplasms prognosis. Articles included in the review were retrieved by searching among the three main scientific databases: PubMed, Scopus, and Embase. FINDINGS The findings of this review suggest that exercise performed under systemic hypoxic conditions could have a positive impact in prognosis and quality of life of the population with digestive system cancers. CONCLUSIONS Further studies are needed to consider this paradigm as a new potential intervention in digestive oncological population.
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Affiliation(s)
- Sergio Pérez Regalado
- Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, Granada, Spain
| | - Josefa León
- Clinical Management Unit of Digestive System, San Cecilio Hospital, Ibs.GRANADA, Granada, Spain.
| | - Belén Feriche
- Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, Granada, Spain
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Zhang JH, Zhang Q, Jia JZ, Li HM, Zhang C, Hu JY, Zhang DX, Huang YS. [Effects of B-cell lymphoma-2/adenovirus E1B 19 000 interacting protein 3 on the migration and motility of human dermal microvascular endothelial cells under hypoxia and the mechanism]. Zhonghua Shao Shang Za Zhi 2021; 37:9-16. [PMID: 33499564 DOI: 10.3760/cma.j.cn501120-20200927-00425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To explore the effects of B-cell lymphoma-2/adenovirus E1B 19 000 interacting protein 3 (BNIP3) on the migration and motility of human dermal microvascular endothelial cells (HDMECs) under hypoxia and the mechanism. Methods: The experimental research method was applied. (1) HDMECs were divided into normoxia group received routine culture and hypoxia 6, 12, 24 h groups treated under hypoxia with oxygen volume fraction of 2% for corresponding time according to the random number table (the same grouping method below). Western blotting was used to detect the protein expressions of BNIP3 and microtubule-associated protein 1 light chain 3Ⅱ (LC3Ⅱ) in HDMECs. (2) HDMECs were divided into normoxia+ unloaded group, normoxia+ BNIP3 knockdown group, hypoxia+ unloaded group, and hypoxia+ BNIP3 knockdown group which were transfected with unloaded virus or BNIP3 knockdown virus and were subjected to normoxic or hypoxic treatment. The BNIP3 protein expression was detected by Western blotting and immunofluorescence staining. The scratch area at 24 h post scratching was detected by scratch test, and the healing rate of scratch was calculated. The curve distance of cell movement was measured with the living cell workstation, and the speed of movement was calculated within 3 hours. (3) HDMECs were grouped and treated as experiment (2). Western blotting and immunofluorescence staining were performed to detect the protein expression of LC3Ⅱ. The number of sample was 3 in the above-mentioned experiments. Data were statistically analyzed with one-way analysis of variance and least significant difference test. Results: (1) Compared with those of normoxia group, the protein expressions of BNIP3 and LC3Ⅱ of cells in hypoxia 6, 12, 24 h groups were significantly increased (P<0.01). (2) After 6 hours of culture, compared with that of hypoxia+ unloaded group, the BNIP3 protein expressions of cells in normoxia+ unloaded group and hypoxia+ BNIP3 knockdown group were significantly decreased (P<0.05 or P<0.01). The red fluorescence denoting BNIP3 protein expression of cells in normoxia+ unloaded group and normoxia+ BNIP3 knockdown group was weak, the red fluorescence of cells in hypoxia+ unloaded group was strong, and the red fluorescence of cells in hypoxia+ BNIP3 knockdown group was significantly decreased compared with that in hypoxia+ unloaded group. After scratching for 24 hours, the scratch of cells in hypoxia+ unloaded group basically healed, while the remaining scratch area in the other three groups were large. The healing rates of scratch of cells in normoxia+ unloaded group, normoxia+ BNIP3 knockdown group, hypoxia+ unloaded group, and hypoxia+ BNIP3 knockdown group were (61±4)%, (58±4)%, (88±4)%, and (57±4)%, respectively. The healing rate of scratch of cells in hypoxia+ unloaded group was significantly higher than that in normoxia+ unloaded group (P<0.01) and hypoxia+ BNIP3 knockdown group (P<0.05). Within 3 hours of observation, the range of cell movement in hypoxia+ unloaded group was significantly larger than that in normoxia+ unloaded group, the range of cell movement in hypoxia+ BNIP3 knockdown group was significantly smaller than that in hypoxia+ unloaded group, and the curve movement velocity of cells in hypoxia+ unloaded group was significantly higher than that in normoxia+ unloaded group and hypoxia+ BNIP3 knockdown group (P<0.01). (3) After 6 hours of culture, compared with hypoxia+ unloaded group, the LC3Ⅱ protein expressions of cells in hypoxia+ unloaded group and hypoxia+ BNIP3 knockdown group were decreased significantly (P<0.05 or P<0.01). After 6 hours of culture, the red fluorescence denoting LC3 protein expressions of cells was weak in normoxia+ unloaded group and normoxia+ BNIP3 knockdown group, the red fluorescence of cells was significantly enhanced in hypoxia+ unloaded group, and the red fluorescence of cells was significantly inhibited in hypoxia+ BNIP3 knockdown group. Conclusions: BNIP3 can promote the migration and motility of HDMECs under hypoxia, and autophagy may be involved in the regulation migration of HDMECs by BNIP3.
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Andreis DT, Mallat J, Tettamanti M, Chiarla C, Giovannini I, Gatti S, Protti A. Increased ratio of P[v-a]CO 2 to C[a-v]O 2 without global hypoxia: the case of metformin-induced lactic acidosis. Respir Physiol Neurobiol 2021; 285:103586. [PMID: 33202296 DOI: 10.1016/j.resp.2020.103586] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Revised: 10/18/2020] [Accepted: 11/11/2020] [Indexed: 12/24/2022]
Abstract
The ratio of venoarterial CO2 tension to arteriovenous O2 content difference (P[v-a]CO2/C[a-v]O2) increases when lactic acidosis is due to inadequate oxygen supply (hypoxia); we aimed to verify whether it also increases when lactic acidosis develops because of mitochondrial dysfunction (dysoxia) with constant oxygen delivery. Twelve anaesthetised, mechanically ventilated pigs were intoxicated with IV metformin (4.0 to 6.4 g over 2.5 to 4.0 h). Saline and norepinephrine were used to preserve oxygen delivery. Lactate and P[v-a]CO2/C[a-v]O2 were measured every one or two hours (arterial and mixed venous blood). During metformin intoxication, lactate increased from 0.8 (0.6-0.9) to 8.5 (5.0-10.9) mmol/l (p < 0.001), even if oxygen delivery remained constant (from 352 ± 78 to 343 ± 97 ml/min, p = 0.098). P[v-a]CO2/C[a-v]O2 increased from 1.6 (1.2-1.8) to 2.3 (1.9-3.2) mmHg/ml/dl (p = 0.004). The intraclass correlation coefficient between lactate and P[v-a]CO2/C[a-v]O2 was 0.72 (p < 0.001). We conclude that P[v-a]CO2/C[a-v]O2 increases when lactic acidosis is due to dysoxia. Therefore, a high P[v-a]CO2/C[a-v]O2 may not discriminate hypoxia from dysoxia as the cause of lactic acidosis.
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Mochizuki M, Sagara H, Nakahara T. Type I collagen facilitates safe and reliable expansion of human dental pulp stem cells in xenogeneic serum-free culture. Stem Cell Res Ther 2020; 11:267. [PMID: 32660544 PMCID: PMC7359624 DOI: 10.1186/s13287-020-01776-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [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: 05/08/2020] [Revised: 05/26/2020] [Accepted: 06/12/2020] [Indexed: 12/12/2022] Open
Abstract
Background Human dental pulp stem cells (DPSCs) are a readily accessible and promising cell source for regenerative medicine. We recently reported that a xenogeneic serum-free culture medium (XFM) is preferable to fetal bovine serum-containing culture medium for ex vivo expansion of DPSCs; however, we observed that, upon reaching overconfluence, XFM cells developed a multilayered structure and frequently underwent apoptotic death, resulting in reduced cell yield. Therefore, we focused on optimization of the XFM culture system to avoid the undesirable death of DPSCs. Methods We selected type I collagen (COL) as the optimal coating substrate for the cultureware and compared DPSCs cultured on COL in XFM (COL-XFM cells) to the conventional XFM cultures (XFM cells). Results Our results demonstrated that COL coating facilitated significantly higher rates of cell isolation and growth; upon reaching overconfluence, cell survival and sustained proliferative potential resulted in two-fold yield compared to the XFM cells. Surprisingly, after subculturing the overconfluent COL-XFM cultures, the cells retained stem cell behavior including stable cell growth, multidifferentiation potential, stem cell phenotype, and chromosomal stability, which was achieved through HIF-1α-dependent production and uniform distribution of collagen type I and its interactions with integrins α2β1 and α11β1 at overconfluency. In contrast, cells undergoing apoptotic death within overconfluent XFM cultures had disorganized mitochondria with membrane depolarization. Conclusion The use of COL as a coating substrate promises safe and reliable handling of DPSCs in XFM culture, allowing translational stem cell medicine to achieve stable isolation, expansion, and banking of donor-derived stem cells.
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Affiliation(s)
- Mai Mochizuki
- Department of Life Science Dentistry, The Nippon Dental University, 1-9-20 Fujimi, Chiyoda-ku, Tokyo, 102-8159, Japan.,Department of Developmental and Regenerative Dentistry, The Nippon Dental University School of Life Dentistry at Tokyo, 1-9-20 Fujimi, Chiyoda-ku, Tokyo, 102-8159, Japan
| | - Hiroshi Sagara
- Medical Proteomics Laboratory, The Institute of Medical Science, The University of Tokyo, 4-6-1 Shirokanedai, Minato-ku, Tokyo, 108-8639, Japan
| | - Taka Nakahara
- Department of Developmental and Regenerative Dentistry, The Nippon Dental University School of Life Dentistry at Tokyo, 1-9-20 Fujimi, Chiyoda-ku, Tokyo, 102-8159, Japan.
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de Mendonça RP, Chemelo GP, Mitre GP, Branco DC, da Costa NMM, Tuji FM, da Silva Kataoka MS, Mesquita RA, de Melo Alves Júnior S, de Jesus Viana Pinheiro J. Role of hypoxia-related proteins in adenoid cystic carcinoma invasion. Diagn Pathol 2020; 15:47. [PMID: 32386517 PMCID: PMC7210690 DOI: 10.1186/s13000-020-00967-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [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: 11/14/2019] [Accepted: 04/29/2020] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND Among cancers affecting the oral cavity, adenoid cystic carcinoma (ACC) is a relatively common malignant neoplasm. It has high rates of metastasis and recurrence and is associated with significant morbidity. During the progression of ACC, the oxygen concentration is reduced in specific areas of the tumour microenvironment, leading to intratumoural hypoxia. The expression of NOTCH1, a disintegrin and metalloproteinase 12 (ADAM-12), hypoxia-inducible factor 1 alpha (HIF-1α), and heparin-binding epidermal growth factor (HB-EGF) under hypoxic conditions has been implicated in invadopodia formation, tumour invasiveness, and metastasis. The aim of this study was to analyse the expression of these proteins to elucidate the mechanisms underlying ACC invasiveness. METHODS Fifteen ACC samples and 10 normal-looking salivary gland (SG) samples were used to investigate the expression of these proteins by immunohistochemistry. Primary antibodies against NOTCH1, ADAM-12, HIF-1α, and HB-EGF were used. RESULTS The immunoexpression of all proteins was higher in ACC samples than in SG samples (p < 0.05). CONCLUSIONS There was increased expression of proteins associated with hypoxia and tumour invasiveness in ACC samples, which indicates a possible role of these proteins in the biological behaviour of this tumour.
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Affiliation(s)
- Raíssa Pinheiro de Mendonça
- Department of Oral Pathology, School of Dentistry, Universidade Federal do Pará, Avenida Augusto Correa, 01, Belem, Para, 66075-110, Brazil
| | - Giordanna Pereira Chemelo
- Department of Oral Pathology, School of Dentistry, Universidade Federal do Pará, Avenida Augusto Correa, 01, Belem, Para, 66075-110, Brazil
| | - Geovanni Pereira Mitre
- Department of Oral Pathology, School of Dentistry, Universidade Federal do Pará, Avenida Augusto Correa, 01, Belem, Para, 66075-110, Brazil
| | - Dimitra Castelo Branco
- Multiprofessional Residency Program, Universidade Estadual do Pará, Rua do Una, 156, Belem, Para, 66050-540, Brazil
| | - Natacha Malu Miranda da Costa
- Department of Periodontology, School of Dentistry, Universidade de São Paulo, Avenida do Café, Subsetor Oeste, 11, Ribeirão Preto, São Paulo, 14040-904, Brazil
| | - Fabrício Mesquita Tuji
- Department of Oral Radiology, School of Dentistry, Universidade Federal do Pará, Avenida Augusto Correa, 01, Belem, Para, 66075-110, Brazil
| | - Maria Sueli da Silva Kataoka
- Department of Oral Pathology, School of Dentistry, Universidade Federal do Pará, Avenida Augusto Correa, 01, Belem, Para, 66075-110, Brazil
| | - Ricardo Alves Mesquita
- Department of Oral Surgery and Pathology, School of Dentistry, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Sérgio de Melo Alves Júnior
- Department of Oral Pathology, School of Dentistry, Universidade Federal do Pará, Avenida Augusto Correa, 01, Belem, Para, 66075-110, Brazil
| | - João de Jesus Viana Pinheiro
- Department of Oral Pathology, School of Dentistry, Universidade Federal do Pará, Avenida Augusto Correa, 01, Belem, Para, 66075-110, Brazil. .,School of Dentistry, Cell Culture Laboratory, Universidade Federal do Pará (UFPA), Institute of Health Sciences, Avenida Augusto Correa, 01, Belem, PA, 66075-110, Brazil.
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Xu ND, Huang LZ, Zhu L, Tang X, Li Y, Zhao MW. [Human umbilical mesenchymal stem cells-derived exosomes modulate the proliferation, apoptosis and migration of human retinal pigment epithelial cells in hypoxia]. Zhonghua Yan Ke Za Zhi 2019; 55:933-41. [PMID: 31874508 DOI: 10.3760/cma.j.issn.0412-4081.2019.12.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To study the effects of human umbilical mesenchymal stem cells (HUMSCs) exosomes on the proliferation and apoptotic as well as migration of human retinal pigment epithelial cells (HRPE) in hypoxia, and explore its mechanism. Method: Direct adherent culture was adopted to cultivate umbilical cord mesenchymal stem cells and amplified to the fourth generation. Markers on the cell surface were identified by flow cytometry. Culture medium was collect without serum from the 4th generation umbilical cord mesenchymal stem cells. Exosomes were separated and extracted, then the ultrastructure was observed under electron microscope and examined expression of CD63 and CD9 protein by Western blot method with isolated and extracted exosomes. HRPE was cultivated in vitro culture, proliferation was detected at the time point of 0, 1, 2, 3, 4, 5 d with MTT assay under hypoxic condition. Meanwhile, the cell migration was quantified by Wound-Healing Assay under hypoxic condition at 0, 24, 48 and 72 h respectively combined with apoptosis test. The HRPE cells in the growth period were divided into 5 groups: the control group, the hypoxia group and the pretreated exosomes group (100, 200, 300 μg/ml). In all groups, apoptosis was observed by Annexin V/PI dual-dye flow cytometry after 48 h's incubation. Proliferation was observed by MTT assay and the migration was observed with Wound-Healing Assay. Results: Flow cytometry detection of the surface marker of HUMSCs in the 4th generation showed strong positive expression of CD105, CD73, CD90. It was suggested that HUMSCs with isolated culture had MSC specific phenotype with duction of lipids and osteoblasts in vitro. The separated exosomes were observed with spherical membranous structures in different sizes by scanning electron microscopy, and Western blot detected positive expression of CD63 and CD9. In vitro culture of HRPE detected by MTT assay for cell proliferation at the time of hypoxic 0, 1, 2, 3, 4, 5 d, the results showed that, comparing with time point 0 d, other groups had statistically significant OD values. In the first 2 days, the proliferation ability of RPE cells gradually increased as the time of hypoxia prolonged(1.862±0.135, 2.278±0.244). After 3 d, the proliferation ability of RPE cells gradually decreased(1.419±0.124, 1.599±0.156). Wound-Healing Assay results showed that the migration distance gradually increased as[(29.883±4.504), (36.200±1.928) μm] the time of hypoxia increased from 0 to 72 h. The cells were fully covering at the point of 72 h [(1.223±0.194), (0.430±0.299) μm]. Apoptosis test results showed that the number of apoptotic cells was different(3.628%±1.348%, 20.123%±1.183%) with the extension of hypoxia Oxygen before 2 d from 0 to 72 h. At the time of d3, there were more apoptotic cells(42.290%±3.217%). There is a significant difference from pre-2d.RPE cells were divided into 5 groups: the control group, the hypoxia group and the pretreated exosomes group (100, 200, 300 μg/ml).After 48 h hypoxia incubation, MTT assay results showed that, compared with the control group (1.870±0.499), the number of cell proliferation was significantly increased (t=-3.116, P<0.05), while compared with the hypoxia group(2.616±0.307), the proliferation number of exosomes was significantly reduced [(2.041±0.115), (1.931±0.205), (1.929±0.025); t=-4.920, -4.540, -5.286, P<0.01], and there was no significant difference between groups with different doses of the exosomes (F=1.181,P>0.05). Annexin V/PI dual-dye flow cytometry was used to observe the apoptosis results. Compared with the control group 1.180%±0.689%, the number of apoptosis in hypoxia group was significantly increased (19.273%±1.194%, t=-32.141, P<0.01), while compared with the hypoxia group, the number of apoptosis in the exosomes was significantly decreased (12.318%±1.087%, 11.878%±1.348%, 11.090%±1.716%; t=-10.547, -10.057, 9.589, P<0.01). There was no significant difference between the groups with different doses of exosomes (F=1.173, P>0.05). Wound-Healing Assay results showed that, compared with the control group(68.047±2.851) μm, the migration distance of the hypoxia group was significantly increased [(13.470±2.255)μm, t=36.778, P<0.01] while compared with the hypoxia group, the migration distance of the exosomes was reduced (33.110±1.774, 24.650±1.175, 26.440±1.674; t=11.766, 10.770, 11.311, P<0.01), and there was no significant difference between the groups of the exosomes (F=1.179, P>0.05). Conclusion: Human umbilical cord mesenchymal stem cells can effectively inhibit the apoptosis and migration of HRPE cells in hypoxia. It provides a theoretical basis for the research and treatment of RPE related diseases. (Chin J Ophthalmol, 2019, 55: 933-941).
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He XR, Huang JC, Chen GP, Lin QC. [MicroRNA-1249 regulates the apoptosis of myocardial cells in rats with chronic intermittent hypoxia by autophagy]. Zhonghua Yi Xue Za Zhi 2019; 98:2937-2941. [PMID: 30293354 DOI: 10.3760/cma.j.issn.0376-2491.2018.36.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the regulation and possible mechanism of microRNA (miR)-1249 on myocardial apoptosis in chronic intermittent hypoxia rats. Methods: A total of 16male SD rats aged 8 weeks were randomly divided into 2 groups by the random number table: normoxia control group and chronic intermittent hypoxia group (CIH) (n=8 each). The CIH group was exposed to intermittent hypoxia every day from 9: 00 to 17: 00 for 8 consecutive weeks, while the control group received the same frequency of pulse air. Hemodynamic values were measured via a cannula inserted into right common carotid artery. The expressions of miR-1249 and microtubule-associated protein light chain 3 (LC3) mRNA were observed by real-time PCR. The expressions of LC3 and Cleaved Caspase-3 were detected by Western bolt. TUNEL staining was performed to detect myocardial apoptosis. The rat cardiomyocyte cell H9C2 was divided into normoxia group, intermittent hypoxia (IH) group and miR-1249 inhibitor transfected and IH treatment group (inhibitor group). At the end of the experiment, the activation of LC3 protein in each group of cells was determined. Results: Compared with normoxia control group, left ventricle end diastolic pressure (LVEDP) increased [(4.6±0.4) vs (2.2±0.1) mmHg (1 mmHg=0.133 kPa)], left ventricular systolic pressure (LVSP) , maximal rate of pressure decline (-dp/dtmax), and maximal rate of pressure development (+ dp/dtmax) decreased in CIH group [(92.7±4.1) vs (135.3±3.2) mmHg, (4 247±108) vs (7 626±235) mmHg/s, and (3 168±105) vs (6 028±81) mmHg/s] (all P<0.001). The expression of miR-1249 and LC3 mRNA were significantly higher in CIH group than that in normoxia control group (all P<0.001), and a positive correlation was found between the expression of LC3 mRNA and miR-1249. The expression of LC3 and Cleaved Caspase-3 protein in myocardial tissue of CIH rats were significantly higher than that of the normoxia control group (all P<0.001). The proportion of myocardial cell apoptosis in CIH rats was significantly higher than that in the normoxia control group [(23.84±4.94)% vs (2.93±0.73)%] (P<0.001). The activation of LC3 in myocardial cells of inhibitor group was significantly lower than that of IH group, but higher than that in normoxia group. Conclusions: CIH could induce LC3 by raising the expression of miR-1249, and then induce the activation of apoptosis protein Caspase3. It ultimately induces myocardial apoptosis.
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Affiliation(s)
- X R He
- Department of Respiratory and Critical Care Medicine, the First Affiliated Hospital of Fujian Medical University, Fujian Provincial Sleep-Disordered Breathing Clinic Center; Laboratory of Respiratory Disease of Fujian Medical University, Fuzhou 350005, China
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Meng X, Xu H, Dang Y, Fan Y, Lv M, Sang H, Xu L. Hyperoxygenated Hydrogen-Rich Solution Suppresses Lung Injury Induced by Hemorrhagic Shock in Rats. J Surg Res 2019; 239:103-114. [PMID: 30825755 DOI: 10.1016/j.jss.2019.01.050] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Revised: 12/06/2018] [Accepted: 01/17/2019] [Indexed: 11/26/2022]
Abstract
BACKGROUND Hemorrhagic shock could induce acute lung injury (ALI), which is associated with cell hypoxia, lung tissue inflammation, free radical damage, and excessive cell apoptosis. Our previous studies demonstrated that hyperoxygenated solution could alleviate cell hypoxia. Furthermore, hydrogen-rich solution (HS) could relieve lung tissue inflammation, free radical damage and excessive cell apoptosis. Therefore we hypothesize that Hyperoxygenated Hydrogen-rich solution (HOHS) can protect the lung against ALI. MATERIALS AND METHODS SD rats were randomly divided into five groups (n = 6 at each time point in each group) and were exposed to Hemorrhagic shock induced ALI, and then treated with lactated Ringer's solution (LRS), hyperoxygenated solution, HS, and HOHS, respectively. The protective effects of these solutions were assessed using methods as follows: arterial blood samples were collected for blood gas analysis; Bronchoalveolar lavage fluid was collected for cell count and protein quantification; lung tissue samples were collected to measure wet/dry ratio, as well as levels of T-SOD, MDA, TNF-α, and IL-6; Caspase-3 and TUNEL-positive cells, and pathological changes were observed under light microscope; ALI was scored using the Smith scoring method; ultrastructural changes of lung tissues were further observed with transmission electron microscopy. RESULTS The results indicated that PaO2, PaCO2, and T-SOD increased in the three treatment groups (P < 0.05), most significantly in the HOHS group (P < 0.01) compared with the LRS group; and conversely that the levels of lactate, MDA, TNF-α and IL-6, cell count, protein content, caspase-3 and TUNEL-positive cells as well as ALI score decreased in the three treatment groups (P < 0.05), most significantly in the HOHS group (P < 0.01) compared with the LRS group. Morphological observation with optical microscope and electron microscopy showed that compared with the LRS group, cell damage in the three treatment groups improved to a varying extent, especially evident in the HOHS group. CONCLUSIONS These findings demonstrate that HOHS can protect the lung against ALI induced by hemorrhagic shock.
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Affiliation(s)
- Xiangzhong Meng
- Department of Anesthesiology, State Key Laboratory of Military Stomatology, National Clinical Research Center for Oral Diseases, Shaanxi Engineering Research Center for Dental Materials and Advanced Manufacture, School of Stomatology, Air Force Medical University, Xi'an, Shaanxi, China
| | - Hao Xu
- Institution of Basic Medical Science, Xi'an Medical University, Xi'an, China
| | - Yangjie Dang
- The Department of Anesthesiology, Children Hospital of Xi'an, Xi'an, Shaanxi, China
| | - Yingying Fan
- Center for Mitochondrial Biology and Medicine and Key Laboratory of Biochemical Information Engineering of the Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, China
| | - Miaomiao Lv
- Department of Anesthesiology, No. 323 Hospital of PLA, Xi'an, China
| | - Hanfei Sang
- Department of Anesthesiology, Xiang'an Hospital of Xiamen Uiversity, Xiamen, Fujian Province, P.R., China
| | - Lixian Xu
- Department of Anesthesiology, State Key Laboratory of Military Stomatology, National Clinical Research Center for Oral Diseases, Shaanxi Engineering Research Center for Dental Materials and Advanced Manufacture, School of Stomatology, Air Force Medical University, Xi'an, Shaanxi, China.
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Zhu H, Zhu LM, Jiang YL, Hu RC, Dai AG. [Effect of HIF-2α mediated FoxM1 expression on proliferation of pulmonary artery smooth muscle cells in hypoxic rats]. Zhonghua Yi Xue Za Zhi 2019; 99:129-134. [PMID: 30669752 DOI: 10.3760/cma.j.issn.0376-2491.2019.02.011] [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] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the effect of hypoxia-inducible factor 2α (HIF-2α) gene on the expression of Forkhead box M1 (FoxM1) protein in the proliferation of hypoxic rat pulmonary artery smooth muscle cells (PASMC). Methods: HIF-2α overexpression lentiviral vector (LV-HIF-2α) and silencing RNA (siRNA) were constructed and transfected into rat PASMC under normoxia and hypoxia, respectively. The PASMC under normoxia were classified into normoxic control group, normoxia + LV-HIF-2α empty group, normoxia + LV-HIF-2α group; the PASMC under hypoxia were classified into hypoxic control group, hypoxia + siRNA-HIF-2α empty group, hypoxia + siRNA-HIF-2α group. The expression of HIF-2α and its downstream proteins FoxM1, cyclin D1 and Aurora A expressions were detected by Western blot. 5-Ethyny-2'-deoxyuridine (EdU) cell proliferation assay was used to evaluate the effect of overexpression and inhibition of HIF-2α expression on the proliferation of rat PASMC. Results: The expression of HIF-2α in normoxia + LV-HIF-2α group was significantly higher than that in normoxic control group and normoxia+LV-HIF-2α empty group (0.17±0.02 vs 0.09±0.01 and 0.07±0.00), while the expression of HIF-2α in PASMC of hypoxia + siRNA-HIF-2α group was significantly lower than that of hypoxic control group and hypoxia + siRNA-HIF-2α empty group (0.28±0.01 vs 0.35±0.02 and 0.30±0.01) (all P<0.05); the expression of FoxM1 protein, cyclinD1 and cell proliferation-related Aurora A protein in normoxia+LV-HIF-2α group were significantly higher than that in normoxic control group and normoxia+LV-HIF-2α empty group (0.40±0.03 vs 0.24±0.01 and 0.30±0.01, 0.22±0.02 vs 0.09±0.01 and 0.08±0.02, 0.29±0.02 vs 0.04±0.01 and 0.07±0.01, respectively) (all P<0.05); the expressions of FoxM1 protein, cyclinD1 and Aurora A protein in hypoxia + siRNA-HIF-2α group were significantly lower than those in hypoxic control group and hypoxia + siRNA-HIF-2α empty group (0.23±0.01 vs 0.36±0.02 and 0.32±0.01, 0.15±0.01 vs 0.31±0.01 and 0.28±0.03, 0.14±0.02 vs 0.33±0.03 and 0.27±0.02, respectively) (all P<0.05); the positive expression rate of EdU in the normoxic control group was significantly lower than that in the normoxia+LV-HIF-2α group [(30.77±2.43)% vs (55.56±3.01)%], while the hypoxic control group was significantly higher than the hypoxic+siRNA-HIF-2α group [(65.28±3.21)% vs (44.64±2.78)%] (both P<0.05). Conclusion: HIF-2α up-regulates the expression of FoxM1 and promotes the proliferation of pulmonary artery smooth muscle cells in hypoxic rats.
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Affiliation(s)
- H Zhu
- Department of Respiratory Medicine, Hunan Provincial People's Hospital (First Affiliated Hospital of Hunan Normal University), Changsha 410016, China
| | - L M Zhu
- Department of Respiratory Medicine, Hunan Provincial People's Hospital (First Affiliated Hospital of Hunan Normal University), Changsha 410016, China
| | - Y L Jiang
- Department of Respiratory Medicine, Hunan Provincial People's Hospital (First Affiliated Hospital of Hunan Normal University), Changsha 410016, China
| | - R C Hu
- Department of Respiratory Medicine, Hunan Provincial People's Hospital (First Affiliated Hospital of Hunan Normal University), Changsha 410016, China
| | - A G Dai
- Institute of Respiratory Diseases, Changsha Medical University, Changsha 410219, China
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Lu YT, Wei LS, Wang ZY, Li W, Duan YW, Gao M, Liu J, Zhao YH, Li SL. [TGF-β3 improves bone mesenchymal stem cells toward chondrogenic differentiation under hypoxia environment]. Zhonghua Yi Xue Za Zhi 2018; 98:2198-2202. [PMID: 30032526 DOI: 10.3760/cma.j.issn.0376-2491.2018.27.015] [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] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the impact of TGF-β3 on the chondrogenesis of bone marrow mesenchymal stem cells (BM-MSCs) under hypoxia environment. Methods: BM-MSCs were obtained from SD rat tibias and femora and cultured with whole bone marrow adherent method. Cell surface antigens were analyzed by flow cytometry and the multiple-directional differentiation capabilities were detected with special differentiation agents to affirm the reality of BM-MSCs. Under normoxia or hypoxia condition, BM-MSCs were induced with TGF-β3 or not. Then, alcian blue and immunofluorescence staining were performed to evaluate the expression level of aggrecan, collagen Ⅱ. qRT-PCR analysis were performed to analyze the expression of aggrecan, collagen Ⅱ and collagen Ⅹ. qRT-PCR and Western blot analysis was performed to detect the mRNA and protein level of HIF-1α, collagenⅡ and β-catenin. Results: BM-MSCs were fibroblast-like shape and had ablities of osteogeic, adipogenic and chondrogenic differentiation, with the expression of CD(29, )CD(44) and CD(90) but not CD(45). Alcian blue and immunofluorescence staining showed that BM-MSCs strongly expressed the aggrecan and collagen Ⅱ with the presence of TGF-β3 under hypoxia condition. qRT-PCR analysis showed the mRNA expression levels of collagen Ⅱ, aggrecan and collagen Ⅹ were up-regulated at 2.46, 2.20 and 1.80 folds, comparing with control group (all P<0.05). Western blot analysis showed that the protein levels of HIF-1α, collagenⅡ in BM-MSCs were up-regulated with the presence of TGF-β3 under hypoxia condition, but β-catenin level was down-regulated. Conclusion: TGF-β3 promotes the chondrogenic differentiation ability of BM-MSCs under hypoxia condition, which may be relative with the inhibition of Wnt/β-catenin signaling pathway.
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Affiliation(s)
- Y T Lu
- Department of Medical Image, the Third Affiliated Hospital, Southern Medical University, Guangzhou 510515, China
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Zheng J, Zhang M, Weng H. Induction of the mitochondrial NDUFA4L2 protein by HIF-1a regulates heart regeneration by promoting the survival of cardiac stem cell. Biochem Biophys Res Commun 2018; 503:2226-33. [PMID: 29953852 DOI: 10.1016/j.bbrc.2018.06.142] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Accepted: 06/25/2018] [Indexed: 12/11/2022]
Abstract
The adult mammalian heart doesn't regenerate after cardiomyocyte injury, which was mainly caused by the severe and persistent effects of cardiomyopathy. Recently, some studies reported that the mammalian heart can regenerate under low oxygen environment. However, the mechanism that the mammalian heart can regenerate remains unknown. Here, we used cardiac stem cells (CSCs) to be planted in serum-free medium under hypoxia environment to understand the mechanism of HIF1α/NDUFA4L2 in the regulation of hypoxia-alleviated apoptosis. Our results revealed that hypoxia can alleviated CSCs apoptosis. Hypoxia inhibited the level of cleaved-caspase3 and stimulated the expression of stabilized HIF-1α. DMOG promotes the survival of CSCs and the protein expression of NDUFA4L2. 2-ME repressed the survival of CSCs and the protein expression of NDUFA4L2. CHIP assay showed that HIF-1α regulated the survival of CSCs by augmenting the combination of HIF-1α and NDUFA4L2's HRE. Knockdown of NDUFA4L2 reversed the role of hypoxia in the survival of CSCs. Taken together, hypoxia promotes the viability of CSCs in serum-free medium by HIF-1α/NDUFA4L2 signaling pathway.
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Wei YL, Dong HM, Xie ZF, Cai SX. [Role of reactive oxygen species in hypoxia-induced non-small cell lung cancer migration]. Zhonghua Yi Xue Za Zhi 2018; 97:3174-3178. [PMID: 29081166 DOI: 10.3760/cma.j.issn.0376-2491.2017.40.012] [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] [Indexed: 11/05/2022]
Abstract
Objective: To explore reactive oxygen species (ROS) generation and its role on A549 cell migration under hypoxic condition. Methods: Human non-small cell lung cancer (NSCLC) cell line A549 was incubated in a hypoxic environment (1%O(2), hypoxia group) or in a normoxic environment (21%O(2), normoxia group). The generation of ROS was measured by flow cytometry. The cell motility of A549 cells was detected by Transwell assay. The protein levels of protein kinase B (AKT), p38 mitogen-activated protein kinase (p38) were determined by Western blot analysis. Results: After 16 h hypoxic treatment, the migration of A549 cells in hypoxia group was significantly more than that of normoxia group [(85±10) vs (56±7) per lower magnification, P<0.001]. Besides, the generation of ROS was in a time-depended manner in hypoxia group. The ROS level was increased with the prolonged hypoxia time. It was significantly higher at 24 h than that in normoxia group [(273±4)% vs (102±6)%, P<0.001]. The migrated cells in hypoxia group co-treated with 2 mmol/L NAC for 16 h were less than that with hypoxic treatment alone [(47±13) vs (105±14) per lower magnification, P=0.011]. Meanwhile, the phosphorylation of AKT and p38 increased after 12 h hypoxic treatment in hypoxia group, however, 2 mmol/L NAC co-treatment attenuated this effect. Furthermore, inhibition of phosphorylated AKT with 0.1 μmol/L allosteric AKT inhibitor (MK-2206) in hypoxia group for 16 h reversed the hypoxia-induced A549 cell migration. The migrated cells in hypoxia+ MK-2206 group were significantly less than that in hypoxia group [(155±21) vs (249±32) per lower magnification, P<0.001]. Conclusions: Hypoxia increases the generation of ROS in A549, resulting from oxidative stress under hypoxia. The increased ROS level promotes cell motility through the activation of AKT.
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Affiliation(s)
- Y L Wei
- Chronic Airways Diseases Laboratory, Department of Respiratory and Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
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He XR, Lin QC, Chen Q. [Effects of Prescription Yiqi Huatan Quyu on oxidative stress level and pathological changes in chronic intermittent hypoxia rat liver]. Zhonghua Yi Xue Za Zhi 2018; 97:457-461. [PMID: 28219135 DOI: 10.3760/cma.j.issn.0376-2491.2017.06.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the effects of Yiqi Huatan Quyu prescription on oxidative stress and pathological changes in chronic intermittent hypoxia rats liver. Methods: A total of 24 male SD rats aged eight weeks were randomly divided into 3 groups by the random number table: normal control group (NC), chronic intermittent hypoxia group (CIH) and chronic intermittent hypoxia plus Yiqi Huatan Quyu prescription supplement group (Chinese medicine group, CM)(n=8 each). The CIH group and CIHN group were exposed to intermittent hypoxia every day for 8 consecutive weeks. In addition, the CIHN group received Yiqi Huatan Quyu prescription via gavage 30 min before the CIH. Eight weeks later, serums were collected to test alanine aminotransferase (ALT) and aspartate aminotransferase (AST) level. Meanwhile, rat livers were extracted to evaluate malondialdehyde (MDA), total superoxide dismutase (T-SOD), glutathione (GSH) and Nuclear factor κB (NF-κB) and observe the pathological changes of liver. Results: The levels of serum ALT and AST in the CIH group were significantly higher than those of NC group[(112.1±31.7) vs (41.3±6.6) U/L, (295.4±39.8) vs (104.5±12.3) U/L], the contents of the MDA and NF-κB in the CIH group were notably higher than those of NC group[(7.9±1.1) vs (3.6±0.7) nmol/mgprot, (16.2±3.3) vs (5.7±2.2) ng/L], the activities of T-SOD and GSH in the CIH group were significantly lower than those of control group[(181.6±28.6) vs (304.3±42.9) U/mgprot, (5.5±1.3) vs (14.9±2.4) mg/gprot](all P<0.001). The levels of the serum ALT and AST in CM group were significantly lower than those of CIH group[(52.2±8.6) vs (112.1±31.7) U/L, (148.1±20.4) vs (295.4±39.8) U/L], the contents of liver MDA in CM group was notably lower than those of CIH group[(4.5±0.7) vs (7.9±1.1) nmol/mgprot], the activities of liver T-SOD and GSH in CM group were significantly higher than those of CIH group[(226.9±38.9) vs (181.6±28.6) U/mgprot, (10.3±1.7) vs (5.5±1.3) mg/gprot](all P<0.05). Compared with CIH group, declining tendency was observed from contents of NF-κB in CM group, but there was no statistical difference[(15.8±2.1) vs (16.2±3.3) ng/L, P>0.05]. Pathology observation showed the CIH group had abundant inflammatory cells infiltration in the liver portal area and the inflammatory cells infiltration decreased following Chinese medicine treatments. Conclusion: Yiqi Huatan Quyu prescription has some protection to CIH rat liver, which might mediate by the reduction of oxidative stress and inflammatory mediator.
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Affiliation(s)
- X R He
- Department of Respiratory and Critical Care Medicine, the First Affiliated Hospital of Fujian Medical University, Fujian Provincial Sleep-disordered Breathing Clinic Center; Laboratory of Respiratory Disease of Fujian Medical University, Fuzhou 350005, China
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Wu D, Han X, Feng J, Song YJ. [Expression of high-mobility group box-Ⅰ and N-methyl-D-aspartate receptor in status epilepticus]. Zhonghua Yi Xue Za Zhi 2018; 98:51-55. [PMID: 29343030 DOI: 10.3760/cma.j.issn.0376-2491.2018.01.011] [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] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the expression changes of high mobility group box-1 (HMGB1) and the 2B receptor of N- methyl -D- aspartate receptor (NR2B) in status epilepticus (SE). Methods: (1) Primary hippocampal neurons from SD rats with 16 to 18 days of fetal age were cultured in vitro for 7 days, and exposed to Mg(2+) free media for 3 hours. Those cultured neurons were randomly divided into control group and intermittent hypoxia group. (2) SD rats with similar weight were selected and randomly divided into control group and SE model group. The rat model with SE was established by an intraperitoneal injection of lithium chloride-piloearpine (LI-PILO). Real-time PCR technique was used to detect the expression of HMGB1 and NR2B mRNA. Results: In Sombati's cell model cultured in normal concentration of oxygen, the HMGB1 mRNA expression levels were 0.005 01±0.000 54, 0.026 76±0.003 75, 0.003 52±0.000 33, and the NR2B mRNA expression levels were 0.008 84±0.000 69, 0.012 23±0.000 90, 0.029 11±0.000 71, respectively, at 2, 4 and 6 h; compared with the expressions of HMGB1 and NR2B mRNA at the same time points of Sombatis cell model groups, the differences were also significant (all P<0.05). After the successful establishment of epilepsy model, the HMGB1 mRNA expression levels were 0.000 11±0.000 09, 0.000 18±0.000 01, 0.000 11±0.000 01, and the NR2B mRNA expression levels were 0.196 12±0.009 41, 0.232 11±0.006 27, 0.272 48±0.005 84, respectively, at 6, 8 and 10 h; compared with the expressions of HMGB1 and NR2B mRNA at the same time points of control groups, the differences were all significant (all P<0.05). Conclusion: HMGB1 mRNA expression levels increase at 2, 4 h, decrease at 6 h in the Sombati's cell model in normal oxygen culture, while increase at 6, 8 h, and decrease at 10 h in LI-PILO induced rat model with SE; the NR2B mRNA relative expression increases with time in both the Sombati's cell model in normal oxygen culture and rat model of SE.
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Affiliation(s)
- D Wu
- Department of Neurology, Baodi Clinical College of Tianjin Medical University, Tianjin 301800, China
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Xu LF, Cai YF, Hu K, Tang S, Zhou XF, Li HM. [Effects of chronic intermittent hypoxia on left ventricular myocardial contractibility in a rabbit model of obstructive sleep apnea]. Zhonghua Yi Xue Za Zhi 2017; 97:2528-2532. [PMID: 28835062 DOI: 10.3760/cma.j.issn.0376-2491.2017.32.012] [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] [Indexed: 11/05/2022]
Abstract
Objective: To explore the effects of chronic intermittent hypoxia (CIH) on left ventricular myocardial contractibility in a rabbit model of obstructive sleep apnea (OSA). Methods: Based on random number table, twenty-four rabbits were randomly divided into three groups: operation, sham, and control groups, each with 8 rabbits. The rabbit model for OSA in operation group was established by repeatedly closing the airway and then reopening it. Upper airway obstructions were conducted on rabbits every day, which were alternately closed for 15 s and then reopened for 75 s in a 90 s-long cycle, for 8 h each day over 3 months. The sham rabbits were subjected to the same surgical procedure but no airway obstructions were applied. The control animals were subjected to no intervention. The blood pressure, left ventricular function parameters were assessed before and after the experiment. And the relative expressions of myosin heavy chain α/β (α-MHC and β-MHC) mRNAs in myocardium were observed for all rabbits by real time fluorescent quantitative polymerase chain reaction 3 months later. Results: After 3 months, all rabbits in the operation group manifested sleepiness and the blood pressure rose gradually [(114.25±4.20) vs (93.88±2.10) mmHg, P<0.01]. Compared with the sham operation and the control groups, the left ventricular end-systolic volume [(6.05±1.62) vs (2.83±0.49) and (2.74±0.32) ml, P<0.001] and the left ventricular end-diastolic volume [(1.61±0.78) vs (0.83±0.13) and (0.82±0.10) ml] in operation group were obviously higher, the left ventricular ejection fraction [(63.9±4.2) % vs (74.3±2.5) % and (75.8±3.8) %], left ventricular fractional shortening [(32.2±2.1) % vs (41.8±1.8) % and (42.1±1.8) %] and stroke volume [(1.46±0.13) vs (1.93±0.21) and (1.98±0.24) ml/s] were decreased (all P<0.001). Besides, the maximal rate of the increase of left ventricular pressure [(4 154±360) vs (6 802±492) and (6 759±206) mmHg/s], the maximal rate of the decrease of left ventricular pressure [(4 994±621) vs (6 330±314) and (6 591±225) mmHg/s] in the operation group decreased markedly, left ventricular end diastolic pressure (LVEDP) increased [(6.5±1.6) vs (3.3±0.8) and (3.2±0.9) mmHg] (all P<0.001). The relative expression of α-MHC mRNA in left ventricular myocardial tissue was lower and the relative expression of β-MHC mRNA was higher in operation group than those in the sham operation and the control groups (P<0.05). There were no significant difference in the relevant indicators of cardiac function, and in the relative expressions of α-MHC mRNA and the β-MHC mRNA between the control group and the sham operation group (P>0.05). Conclusions: Repeated intermittent hypoxia can induce hypertension and myocardial contractibility damage in OSA model rabbit simulating upper airway obstruction.
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Affiliation(s)
- L F Xu
- Respiratory Department, Renmin Hospital of Wuhan University, Wuhan 430060, China
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Lo Sicco C, Reverberi D, Balbi C, Ulivi V, Principi E, Pascucci L, Becherini P, Bosco MC, Varesio L, Franzin C, Pozzobon M, Cancedda R, Tasso R. Mesenchymal Stem Cell-Derived Extracellular Vesicles as Mediators of Anti-Inflammatory Effects: Endorsement of Macrophage Polarization. Stem Cells Transl Med 2017; 6:1018-1028. [PMID: 28186708 PMCID: PMC5442783 DOI: 10.1002/sctm.16-0363] [Citation(s) in RCA: 351] [Impact Index Per Article: 50.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Revised: 10/31/2016] [Accepted: 11/29/2016] [Indexed: 12/13/2022] Open
Abstract
Mesenchymal Stem Cells (MSCs) are effective therapeutic agents enhancing the repair of injured tissues mostly through their paracrine activity. Increasing evidences show that besides the secretion of soluble molecules, the release of extracellular vesicles (EVs) represents an alternative mechanism adopted by MSCs. Since macrophages are essential contributors toward the resolution of inflammation, which has emerged as a finely orchestrated process, the aim of the present study was to carry out a detailed characterization of EVs released by human adipose derived-MSCs to investigate their involvement as modulators of MSC anti-inflammatory effects inducing macrophage polarization. The EV-isolation method was based on repeated ultracentrifugations of the medium conditioned by MSC exposed to normoxic or hypoxic conditions (EVNormo and EVHypo ). Both types of EVs were efficiently internalized by responding bone marrow-derived macrophages, eliciting their switch from a M1 to a M2 phenotype. In vivo, following cardiotoxin-induced skeletal muscle damage, EVNormo and EVHypo interacted with macrophages recruited during the initial inflammatory response. In injured and EV-treated muscles, a downregulation of IL6 and the early marker of innate and classical activation Nos2 were concurrent to a significant upregulation of Arg1 and Ym1, late markers of alternative activation, as well as an increased percentage of infiltrating CD206pos cells. These effects, accompanied by an accelerated expression of the myogenic markers Pax7, MyoD, and eMyhc, were even greater following EVHypo administration. Collectively, these data indicate that MSC-EVs possess effective anti-inflammatory properties, making them potential therapeutic agents more handy and safe than MSCs. Stem Cells Translational Medicine 2017 Stem Cells Translational Medicine 2017;6:1018-1028.
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Affiliation(s)
- Claudia Lo Sicco
- Department of Experimental Medicine, University of Genova, Genova, Italy
- U.O. Regenerative Medicine, IRCCS AOU San Martino-IST, National Cancer Research Institute, Genova, Italy
| | - Daniele Reverberi
- U.O. Molecular Pathology, IRCCS AOU San Martino-IST, National Cancer Research Institute, Genova, Italy
| | - Carolina Balbi
- Department of Experimental Medicine, University of Genova, Genova, Italy
| | - Valentina Ulivi
- Department of Experimental Medicine, University of Genova, Genova, Italy
| | - Elisa Principi
- Department of Experimental Medicine, University of Genova, Genova, Italy
| | - Luisa Pascucci
- Department of Veterinary Medicine, University of Perugia, Perugia, Italy
| | - Pamela Becherini
- Molecular Biology Laboratory, Istituto Giannina Gaslini, Genova, Italy
- Department of Internal Medicine, University of Genova, Genova, Italy
| | - Maria Carla Bosco
- Molecular Biology Laboratory, Istituto Giannina Gaslini, Genova, Italy
| | - Luigi Varesio
- Molecular Biology Laboratory, Istituto Giannina Gaslini, Genova, Italy
| | - Chiara Franzin
- Stem Cells and Regenerative Medicine Lab, Fondazione Istituto di Ricerca Pediatrica Città della Speranza, Padova, Italy
| | - Michela Pozzobon
- Stem Cells and Regenerative Medicine Lab, Fondazione Istituto di Ricerca Pediatrica Città della Speranza, Padova, Italy
- Department of Women and Children Health, University of Padova, Padova, Italy
| | - Ranieri Cancedda
- Department of Experimental Medicine, University of Genova, Genova, Italy
| | - Roberta Tasso
- U.O. Regenerative Medicine, IRCCS AOU San Martino-IST, National Cancer Research Institute, Genova, Italy
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Wu C, Zheng WW, Yang M. [Viability of osteoblasts under cell hypoxia condition]. Zhonghua Yi Xue Za Zhi 2017; 97:217-222. [PMID: 28162174 DOI: 10.3760/cma.j.issn.0376-2491.2017.03.012] [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] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the effects of hypoxia condition and hypoxia-reoxygenation condition on the cell viability, apoptosis rate and gene expression of osteoblasts cultured in vitro. Methods: The cranium osteoblasts from newborn Sprague Dawley rats within 48 hours were cultured and purified through tissue block method.The morphological changes of cells were evaluated by the Alizarin Red S staining and Alkaline phosphatase staining.The third-generation osteoblasts were cultured in normal condition for 36 hours (group A), in hypoxic condition for 24hours (group B), in hypoxic condition for 24hours thereafter reoxygenated for 12 hours (group D), in hypoxic condition for 36 hours (group C). The cell viability of osteoblasts was tested via MTT assay.The apoptosis rate of osteoblasts was tested by FCM (flow cytometry). Quantitative PCR and Western blot methods were used to determine Collagen type Ⅰ, Bone morphogenetic protein 2 (BMP-2), Runt-related transcription factor 2 (RUNX-2), Transforming growth factor-β1(TGF-β1) expression levels. Results: The cell viability of osteoblasts decreased, group A(99.1%±8.3%), group B(90.9%±9.4%), group C(79.9%±8.7%), group D(73.0%±8.2%), group D <group C <group B <group A (F=37.886, P=0.000); the apoptosis rate of osteoblasts increased, group A(1.9%±1.3%), group B(16.3%±2.5%), group C(28.2%±4.2%), group D(33.5%±3.6%), group D >group C >group B >group A(F=26.198, P=0.000); the mRNA expressions of Col Ⅰ, BMP-2, RUNX-2, TGF-β1 decreased under hypoxia and hypoxia-reoxygenation condition, and group D< group C< group B< group A (F=13.082, P=0.006; F=7.088, P=0.017; F=6.857, P=0.038; F=51.368, P=0.000); the protein expressions of Col Ⅰ, BMP-2, RUNX-2, TGF-β1 decreased under hypoxia and hypoxia-reoxygenation condition, and group D< group C< group B< group A (F=8.114, P=0.013; F=28.935, P=0.000; F=9.857, P=0.007; F=46.541, P=0.000). Conclusion: Hypoxia condition and hypoxia-reoxygenation condition decreased the cell viability, increase the apoptosis rate and suppress the expressions of associated genes.Hypoxia-reoxygenation condition aggravate the injure of osteoblasts preconditioning under hypoxia condition.
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Affiliation(s)
- C Wu
- Department of Orthopedics and Traumatology, Yijishan Hospital, Wannan Medical College, Anhui 241001, China
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Wang S, He M, Li L, Liang Z, Zou Z, Tao A. Cell-in-Cell Death Is Not Restricted by Caspase-3 Deficiency in MCF-7 Cells. J Breast Cancer 2016; 19:231-241. [PMID: 27721872 PMCID: PMC5053307 DOI: 10.4048/jbc.2016.19.3.231] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [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: 12/15/2015] [Accepted: 07/20/2016] [Indexed: 12/30/2022] Open
Abstract
Purpose Cell-in-cell structures are created by one living cell entering another homotypic or heterotypic living cell, which usually leads to the death of the internalized cell, specifically through caspase-dependent cell death (emperitosis) or lysosome-dependent cell death (entosis). Although entosis has attracted great attention, its occurrence is controversial, because one cell line used in its study (MCF-7) is deficient in caspase-3. Methods We investigated this issue using MCF-7 and A431 cell lines, which often display cell-in-cell invasion, and have different levels of caspase-3 expression. Cell-in-cell death morphology, microstructures, and signaling pathways were compared in the two cell lines. Results Our results confirmed that MCF-7 cells are caspase-3 deficient with a partial deletion in the CASP-3 gene. These cells underwent cell death that lacked typical apoptotic properties after staurosporine treatment, whereas caspase-3-sufficient A431 cells displayed typical apoptosis. The presence of caspase-3 was related neither to the lysosome-dependent nor to the caspase-dependent cell-in-cell death pathway. However, the existence of caspase-3 was associated with a switch from lysosome-dependent cell-in-cell death to the apoptotic cell-in-cell death pathway during entosis. Moreover, cellular hypoxia, mitochondrial swelling, release of cytochrome C, and autophagy were observed in internalized cells during entosis. Conclusion The occurrence of caspase-independent entosis is not a cell-specific process. In addition, entosis actually represents a cellular self-repair system, functioning through autophagy, to degrade damaged mitochondria resulting from cellular hypoxia in cell-in-cell structures. However, sustained autophagy-associated signal activation, without reduction in cellular hypoxia, eventually leads to lysosome-dependent intracellular cell death.
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Affiliation(s)
- Shan Wang
- The State Key Clinical Specialty in Allergy, the Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.; Guangdong Provincial Key Laboratory of Allergy & Clinical Immunology, Guangzhou Medical University, Guangzhou, China.; The State Key Laboratory of Respiratory Disease, Guangzhou Medical University, Guangzhou, China
| | - Meifang He
- Department of Gastroenterology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Linmei Li
- The State Key Clinical Specialty in Allergy, the Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.; Guangdong Provincial Key Laboratory of Allergy & Clinical Immunology, Guangzhou Medical University, Guangzhou, China.; The State Key Laboratory of Respiratory Disease, Guangzhou Medical University, Guangzhou, China
| | - Zhihua Liang
- The State Key Clinical Specialty in Allergy, the Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.; Guangdong Provincial Key Laboratory of Allergy & Clinical Immunology, Guangzhou Medical University, Guangzhou, China.; The State Key Laboratory of Respiratory Disease, Guangzhou Medical University, Guangzhou, China
| | - Zehong Zou
- The State Key Clinical Specialty in Allergy, the Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.; Guangdong Provincial Key Laboratory of Allergy & Clinical Immunology, Guangzhou Medical University, Guangzhou, China.; The State Key Laboratory of Respiratory Disease, Guangzhou Medical University, Guangzhou, China
| | - Ailin Tao
- The State Key Clinical Specialty in Allergy, the Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.; Guangdong Provincial Key Laboratory of Allergy & Clinical Immunology, Guangzhou Medical University, Guangzhou, China.; The State Key Laboratory of Respiratory Disease, Guangzhou Medical University, Guangzhou, China
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Lee SH, Jeong D, Han YS, Baek MJ. Pivotal role of vascular endothelial growth factor pathway in tumor angiogenesis. Ann Surg Treat Res 2015; 89:1-8. [PMID: 26131438 PMCID: PMC4481026 DOI: 10.4174/astr.2015.89.1.1] [Citation(s) in RCA: 119] [Impact Index Per Article: 13.2] [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: 01/26/2015] [Revised: 02/06/2015] [Accepted: 02/27/2015] [Indexed: 12/18/2022] Open
Abstract
The shaping of new blood vessels is a significant event in cancer growth and metastasis. Therefore, the molecular system of cancer angiogenesis has garnered considerable interest in cancer research. The vascular endothelial growth factor (VEGF) and VEGF receptor pathway are recognized as the key regulators of the angiogenic process. Activation of the VEGF/VEGF-receptor pathway initiates signaling cascades that promote endothelial cell growth, migration, and differentiation. Recently, VEGF was shown to play a role in the recruitment of bone marrow-derived endothelial progenitor cells to neovascularization sites. The role of VEGF in promoting tumor angiogenesis and the occurrence of human cancers has led to the rational design and development of agents that selectively target this pathway. Moreover, these anti-VEGF/VEGF receptor agents show therapeutic potential by inhibition of angiogenesis and tumor growth in preclinical models. In this review, we summarize the role of the VEGF pathway during tumor angiogenesis.
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Affiliation(s)
- Sang Hun Lee
- Medical Science Research Institute, Soonchunhyang University Seoul Hospital, Seoul, Korea. ; Department of Biochemistry, Soonchunhyang University College of Medicine, Cheonan, Korea
| | - Dongjun Jeong
- Department of Pathology, Soonchunhyang University College of Medicine, Cheonan, Korea
| | - Yong-Seok Han
- Medical Science Research Institute, Soonchunhyang University Seoul Hospital, Seoul, Korea
| | - Moo Jun Baek
- Department of Surgery, Soonchunhyang University College of Medicine, Cheonan, Korea
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Wythe S, Davies T, Martin D, Feelisch M, Gilbert-Kawai E. Getting the most from venous occlusion plethysmography: proposed methods for the analysis of data with a rest/exercise protocol. Extrem Physiol Med 2015; 4:8. [PMID: 26060573 PMCID: PMC4460772 DOI: 10.1186/s13728-015-0027-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/23/2015] [Accepted: 06/02/2015] [Indexed: 11/24/2022]
Abstract
Background Venous occlusion plethysmography is a simple yet powerful technique for the non-invasive measurement of blood flow. It has been used extensively in both the experimental and clinical settings. The underlying rationale is that when venous outflow from an extremity is occluded, any immediate increase in volume of this compartment must originate from the on-going arterial inflow. Mercury-in-silastic strain gauges are typically used to measure these volume changes, the rates of which are directly proportional to blood flow. Results When using a simple rest/exercise protocol to provide a local or systemic metabolic stimulus to increase blood flow, current methods for analysing the data obtained are often rather simplistic, solely considering the mean increment in blood flow induced by exercise. Previous methodological considerations have focused mainly on issues of reproducibility and accuracy (for instance, by comparing unilateral and/or bilateral measurements) but rarely on what the recorded traces may actually mean. Conclusions In this methodological manuscript, we suggest a more detailed approach to processing venous occlusion plethysmography data, one which could provide additional physiological information. Six parameters are described, all of which are easily derived from a simple and reproducible experimental rest/exercise venous occlusion plethysmography protocol.
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Affiliation(s)
- Stephen Wythe
- University College London Centre for Altitude Space and Extreme Environment Medicine, UCLH NIHR Biomedical Research Centre, Institute of Sport and Exercise Health, 170 Tottenham Court Road, London, W1T 7HA UK ; TamesAide General Hospital, Fountain Street, Ashton-U-Lyne OL6 9RW, Greater Manchester, UK
| | - Thomas Davies
- University College London Centre for Altitude Space and Extreme Environment Medicine, UCLH NIHR Biomedical Research Centre, Institute of Sport and Exercise Health, 170 Tottenham Court Road, London, W1T 7HA UK
| | - Daniel Martin
- University College London Centre for Altitude Space and Extreme Environment Medicine, UCLH NIHR Biomedical Research Centre, Institute of Sport and Exercise Health, 170 Tottenham Court Road, London, W1T 7HA UK
| | - Martin Feelisch
- University College London Centre for Altitude Space and Extreme Environment Medicine, UCLH NIHR Biomedical Research Centre, Institute of Sport and Exercise Health, 170 Tottenham Court Road, London, W1T 7HA UK ; Integrative Physiology and Critical Illness Group, Clinical and Experimental Sciences, Mailpoint 810, Sir Henry Wellcome Laboratories, Faculty of Medicine, University of Southampton, University Hospital Southampton NHS Foundation Trust, Tremona Road, Southampton, SO16 6YD UK
| | - Edward Gilbert-Kawai
- University College London Centre for Altitude Space and Extreme Environment Medicine, UCLH NIHR Biomedical Research Centre, Institute of Sport and Exercise Health, 170 Tottenham Court Road, London, W1T 7HA UK
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Sonke E, Verrydt M, Postenka CO, Pardhan S, Willie CJ, Mazzola CR, Hammers MD, Pluth MD, Lobb I, Power NE, Chambers AF, Leong HS, Sener A. Inhibition of endogenous hydrogen sulfide production in clear-cell renal cell carcinoma cell lines and xenografts restricts their growth, survival and angiogenic potential. Nitric Oxide 2015; 49:26-39. [PMID: 26068241 DOI: 10.1016/j.niox.2015.06.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Revised: 05/20/2015] [Accepted: 06/01/2015] [Indexed: 11/21/2022]
Abstract
Clear cell renal cell carcinoma (ccRCC) is characterized by Von Hippel-Lindau (VHL)-deficiency, resulting in pseudohypoxic, angiogenic and glycolytic tumours. Hydrogen sulfide (H2S) is an endogenously-produced gasotransmitter that accumulates under hypoxia and has been shown to be pro-angiogenic and cytoprotective in cancer. It was hypothesized that H2S levels are elevated in VHL-deficient ccRCC, contributing to survival, metabolism and angiogenesis. Using the H2S-specific probe MeRhoAz, it was found that H2S levels were higher in VHL-deficient ccRCC cell lines compared to cells with wild-type VHL. Inhibition of H2S-producing enzymes could reduce the proliferation, metabolism and survival of ccRCC cell lines, as determined by live-cell imaging, XTT/ATP assay, and flow cytometry respectively. Using the chorioallantoic membrane angiogenesis model, it was found that systemic inhibition of endogenous H2S production was able to decrease vascularization of VHL-deficient ccRCC xenografts. Endogenous H2S production is an attractive new target in ccRCC due to its involvement in multiple aspects of disease.
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Sun HK, Lee YM, Han KH, Kim HS, Ahn SH, Han SY. Phosphodiesterase inhibitor improves renal tubulointerstitial hypoxia of the diabetic rat kidney. Korean J Intern Med 2012; 27:163-70. [PMID: 22707888 PMCID: PMC3372800 DOI: 10.3904/kjim.2012.27.2.163] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2011] [Revised: 09/26/2011] [Accepted: 11/04/2011] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND/AIMS Renal hypoxia is involved in the pathogenesis of diabetic nephropathy. Pentoxifyllin (PTX), a nonselective phosphodiesterase inhibitor, is used to attenuate peripheral vascular diseases. To determine whether PTX can improve renal hypoxia, we investigated its effect in the streptozocin (STZ)-induced diabetic kidney. METHODS PTX (40 mg/kg, p.o.) was administered to STZ-induced diabetic rats for 8 weeks. To determine tissue hypoxia, we examined hypoxic inducible factor-1α (HIF-1α), heme oxygenase-1 (HO-1), vascular endothelial growth factor (VEGF), and glucose transporter-1 (GLUT-1) levels. We also tested the effect of PTX on HIF-1α in renal tubule cells. RESULTS PTX reduced the increased protein creatinine ratio in diabetic rats at 8 weeks. HIF-1α, VEGF, and GLUT-1 mRNA expression increased significantly, and the expression of HO-1 also tended to increase in diabetic rats. PTX significantly decreased mRNA expression of HIF-1α and VEGF at 4 and 8 weeks, and decreased HO-1 and GLUT-1 at 4 weeks. The expression of HIF-1α protein was significantly increased at 4 and 8 weeks in tubules in the diabetic rat kidney. PTX tended to decrease HIF-1α protein expression at 8 weeks. To examine whether PTX had a direct effect on renal tubules, normal rat kidney cells were stimulated with CoCl(2) (100 µM), which enhanced HIF-1α mRNA and protein levels under low glucose conditions (5.5 mM). Their expressions were similar even after high glucose (30 mM) treatment. PTX had no effect on HIF-1α expression. CONCLUSIONS PTX attenuates tubular hypoxia in the diabetic kidney.
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Affiliation(s)
- Hui-Kyoung Sun
- Division of Nephrology, Department of Internal Medicine, Ilsan-Paik Hospital, Inje University College of Medicine, Goyang, Korea
| | - Yun Mi Lee
- Clinical Research Center, Ilsan-Paik Hospital, Inje University College of Medicine, Goyang, Korea
| | - Kum Hyun Han
- Division of Nephrology, Department of Internal Medicine, Ilsan-Paik Hospital, Inje University College of Medicine, Goyang, Korea
| | - Han-Seong Kim
- Department of Pathology, Ilsan-Paik Hospital, Inje University College of Medicine, Goyang, Korea
| | - Seon-Ho Ahn
- Division of Nephrology, Department of Medicine, Wonkwang University College of Medicine, Iksan, Korea
| | - Sang-Youb Han
- Division of Nephrology, Department of Internal Medicine, Ilsan-Paik Hospital, Inje University College of Medicine, Goyang, Korea
- Clinical Research Center, Ilsan-Paik Hospital, Inje University College of Medicine, Goyang, Korea
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Park KJ, Kim YJ, Choi EJ, Park NK, Kim GH, Kim SM, Lee SY, Bae JW, Hwang KK, Kim DW, Cho MC. Expression pattern of the thioredoxin system in human endothelial progenitor cells and endothelial cells under hypoxic injury. Korean Circ J 2010; 40:651-8. [PMID: 21267388 PMCID: PMC3025339 DOI: 10.4070/kcj.2010.40.12.651] [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] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2010] [Revised: 06/21/2010] [Accepted: 08/09/2010] [Indexed: 11/11/2022] Open
Abstract
Background and Objectives The thioredoxin (TRx) system is a ubiquitous thiol oxidoreductase pathway that regulates cellular reduction/oxidation status. Although endothelial cell (EC) hypoxic damage is one of the important pathophysiologic mechanisms of ischemic heart disease, its relationship to the temporal expression pattern of the TRx system has not yet been elucidated well. The work presented here was performed to define the expression pattern of the TRx system and its correlation with cellular apoptosis in EC lines in hypoxic stress. These results should provide basic clues for applying aspects of the TRx system as a therapeutic molecule in cardiovascular diseases. Subjects and Methods Hypoxia was induced with 1% O2, generated in a BBL GasPak Pouch (Becton Dickinson, Franklin Lakes, NJ, USA) in human endothelial progenitor cells (hEPC) and human umbilical vein endothelial cells (HUVEC). Apoptosis of these cells was confirmed by Annexin-V: Phycoerythrin flow cytometry. Expression patterns of TRx; TRx reductase; TRx interacting protein; and survival signals, such as Bcl-2 and Bax, in ECs under hypoxia were checked. Results Apoptosis was evident after hypoxia in the two cell types. Higher TRx expression was observed at 12 hours after hypoxia in hEPCs and 12, 36, 72 hours of hypoxia in HUVECs. The expression patterns of the TRx system components showed correlation with EC apoptosis and cell survival markers. Conclusion Hypoxia induced significant apoptosis and its related active changes of the TRx system were evident in human EC lines. If the cellular impact of TRx expression pattern in various cardiovascular tissues under hypoxia or oxidative stress was studied meticulously, the TRx system could be applied as a new therapeutic target in cardiovascular diseases, such as ischemic heart disease or atherosclerosis.
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Affiliation(s)
- Keon-Jae Park
- Division of Cardiology, Department of Internal Medicine, Chungbuk National University School of Medicine, Cheongju, Korea
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