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Liu D, Dong C, Wang F, Liu W, Jin X, Qi SL, Liu L, Jin Q, Wang S, Wu J, Wang C, Yang J, Deng H, Cai Y, Yang L, Qin J, Zhang C, Yang X, Wang MS, Yu G, Xue YW, Wang Z, Ge GB, Xu Z, Chen WL. Active post-transcriptional regulation and ACLY-mediated acetyl-CoA synthesis as a pivotal target of Shuang-Huang-Sheng-Bai formula for lung adenocarcinoma treatment. Phytomedicine 2023; 113:154732. [PMID: 36933457 DOI: 10.1016/j.phymed.2023.154732] [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] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 02/09/2023] [Accepted: 02/22/2023] [Indexed: 06/18/2023]
Abstract
BACKGROUND New therapeutic approaches are required to improve the outcomes of lung cancer (LC), a leading cause of cancer-related deaths worldwide. Chinese herbal medicine formulae widely used in China provide a unique opportunity for improving LC treatment, and the Shuang-Huang-Sheng-Bai (SHSB) formula is a typical example. However, the underlying mechanisms of action remains unclear. PURPOSE This study aimed to confirm the efficacy of SHSB against lung adenocarcinoma (LUAD), which is a major histological type of LC, unveil the downstream targets of this formula, and assess the clinical relevance and biological roles of the newly identified target. METHODS An experimental metastasis mouse model and a subcutaneous xenograft mouse model were used to evaluate the anti-cancer activity of SHSB. Multi-omics profiling of subcutaneous tumors and metabolomic profiling of sera were performed to identify downstream targets, especially the metabolic targets of SHSB. A clinical trial was conducted to verify the newly identified metabolic targets in patients. Next, the metabolites and enzymes engaged in the metabolic pathway targeted by SHSB were measured in clinical samples. Finally, routine molecular experiments were performed to decipher the biological functions of the metabolic pathways targeted by SHSB. RESULTS Oral SHSB administration showed overt anti-LUAD efficacy as revealed by the extended overall survival of the metastasis model and impaired growth of implanted tumors in the subcutaneous xenograft model. Mechanistically, SHSB administration altered protein expression in the post-transcriptional layer and modified the metabolome of LUAD xenografts. Integrative analysis demonstrated that SHSB markedly inhibited acetyl-CoA synthesis in tumors by post-transcriptionally downregulating ATP-citrate lyase (ACLY). Consistently, our clinical trial showed that oral SHSB administration declined serum acetyl-CoA levels of patients with LC. Moreover, acetyl-CoA synthesis and ACLY expression were both augmented in clinical LUAD tissues of patients, and high intratumoral ACLY expression predicted a detrimental prognosis. Finally, we showed that ACLY-mediated acetyl-CoA synthesis is essential for LUAD cell growth by promoting G1/S transition and DNA replication. CONCLUSION Limited downstream targets of SHSB for LC treatment have been reported in previous hypothesis-driven studies. In this study, we conducted a comprehensive multi-omics investigation and demonstrated that SHSB exerted its anti-LUAD efficacy by actively and post-transcriptionally modulating protein expression and particularly restraining ACLY-mediated acetyl-CoA synthesis.
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Affiliation(s)
- Dan Liu
- Cancer Institute, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200032, China; Shanghai Frontiers Science Center of Disease and Syndrome Biology of Inflammatory Cancer Transformation, Shanghai 200032, China
| | - Changsheng Dong
- Cancer Institute, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200032, China; Shanghai Frontiers Science Center of Disease and Syndrome Biology of Inflammatory Cancer Transformation, Shanghai 200032, China
| | - Fengying Wang
- Cancer Institute, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200032, China; Shanghai Frontiers Science Center of Disease and Syndrome Biology of Inflammatory Cancer Transformation, Shanghai 200032, China
| | - Wei Liu
- Key Laboratory of Liver and Kidney Diseases (Ministry of Education), Institute of Liver Diseases, Shanghai 200032, China; Key Laboratory of Traditional Chinese Clinical Medicine, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Xing Jin
- Cancer Institute, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200032, China; Shanghai Frontiers Science Center of Disease and Syndrome Biology of Inflammatory Cancer Transformation, Shanghai 200032, China
| | - Sheng-Lan Qi
- Key Laboratory of Liver and Kidney Diseases (Ministry of Education), Institute of Liver Diseases, Shanghai 200032, China; Key Laboratory of Traditional Chinese Clinical Medicine, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Lei Liu
- Department of Thoracic Surgery, The Affiliated Tumor Hospital of Nantong University, Nantong 226300, China
| | - Qiang Jin
- Cancer Institute, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200032, China; Shanghai Frontiers Science Center of Disease and Syndrome Biology of Inflammatory Cancer Transformation, Shanghai 200032, China
| | - Siliang Wang
- Cancer Institute, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200032, China; Shanghai Frontiers Science Center of Disease and Syndrome Biology of Inflammatory Cancer Transformation, Shanghai 200032, China
| | - Jia Wu
- Cancer Institute, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200032, China; Shanghai Frontiers Science Center of Disease and Syndrome Biology of Inflammatory Cancer Transformation, Shanghai 200032, China
| | - Congcong Wang
- Cancer Institute, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200032, China; Shanghai Frontiers Science Center of Disease and Syndrome Biology of Inflammatory Cancer Transformation, Shanghai 200032, China
| | - Jing Yang
- Cancer Institute, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200032, China; Shanghai Frontiers Science Center of Disease and Syndrome Biology of Inflammatory Cancer Transformation, Shanghai 200032, China
| | - Haibin Deng
- Department of Medical Oncology, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200032, China
| | - Yuejiao Cai
- Department of Medical Oncology, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200032, China
| | - Lu Yang
- Department of Medical Oncology, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200032, China
| | - Jingru Qin
- Department of Medical Oncology, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200032, China
| | - Chengcheng Zhang
- Department of Medical Oncology, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200032, China
| | - Xi Yang
- Cancer Institute, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200032, China; Shanghai Frontiers Science Center of Disease and Syndrome Biology of Inflammatory Cancer Transformation, Shanghai 200032, China
| | - Ming-Song Wang
- Department of Thoracic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, China
| | - Guanzhen Yu
- Department of Medical Oncology, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200032, China; Laboratory of Digital Health and Artificial Intelligence, Zhejiang Digital Content Research Institute, Shaoxing 312000, China
| | - Yu-Wen Xue
- Pathology department, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200032, China
| | - Zhongqi Wang
- Department of Medical Oncology, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200032, China
| | - Guang-Bo Ge
- Shanghai Frontiers Science Center of TCM Chemical Biology, Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
| | - Zhenye Xu
- Department of Medical Oncology, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200032, China
| | - Wen-Lian Chen
- Cancer Institute, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200032, China; Shanghai Frontiers Science Center of Disease and Syndrome Biology of Inflammatory Cancer Transformation, Shanghai 200032, China.
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Li SP, Wang YW, Qi SL, Zhang YP, Deng G, Ding WZ, Ma C, Lin QY, Guan HD, Liu W, Cheng XM, Wang CH. Analogous β-Carboline Alkaloids Harmaline and Harmine Ameliorate Scopolamine-Induced Cognition Dysfunction by Attenuating Acetylcholinesterase Activity, Oxidative Stress, and Inflammation in Mice. Front Pharmacol 2018; 9:346. [PMID: 29755345 PMCID: PMC5932362 DOI: 10.3389/fphar.2018.00346] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [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: 01/14/2018] [Accepted: 03/26/2018] [Indexed: 12/28/2022] Open
Abstract
The analogous β-carboline alkaloids, harmaline (HAL) and harmine (HAR), possess a variety of biological properties, including acetylcholinesterase (AChE) inhibitory activity, antioxidant, anti-inflammatory, and many others, and have great potential for treating Alzheimer’s disease (AD). However, studies have showed that the two compounds have similar structures and in vitro AChE inhibitory activities but with significant difference in bioavailability. The objective of this study was to comparatively investigate the effects of HAL and HAR in memory deficits of scopolamine-induced mice. In the present study, mice were pretreated with HAL (2, 5, and 10 mg/kg), HAR (10, 20, and 30 mg/kg) and donepezil (5 mg/kg) by intragastrically for 7 days, and were daily intraperitoneal injected with scopolamine (1 mg/kg) to induce memory deficits and then subjected to behavioral evaluation by Morris water maze. To further elucidate the underlying mechanisms of HAL and HAR in improving learning and memory, the levels of various biochemical factors and protein expressions related to cholinergic function, oxidative stress, and inflammation were examined. The results showed that HAL and HAR could effectively ameliorate memory deficits in scopolamine-induced mice. Both of them exhibited an enhancement in cholinergic function by inhibiting AChE and inducing choline acetyltransferase (ChAT) activities, and antioxidant defense via increasing the antioxidant enzymes activities of superoxide dismutase and glutathione peroxidase, and reducing maleic diadehyde production, and anti-inflammatory effects through suppressing myeloperoxidase, tumor necrosis factor α, and nitric oxide as well as modulation of critical neurotransmitters such as acetylcholine (ACh), choline (Ch), L-tryptophan (L-Trp), 5-hydroxytryptamine (5-HT), γ-aminobutyric acid (γ-GABA), and L-glutamic acid (L-Glu). Furthermore, the regulations of HAL on cholinergic function, inflammation, and neurotransmitters were more striking than those of HAR, and HAL manifested a comparable antioxidant capacity to HAR. Remarkably, the effective dosage of HAL (2 mg/kg) was far lower than that of HAR (20 mg/kg), which probably due to the evidently differences in the bioavailability and metabolic stability of the two analogs. Taken together, all these results revealed that HAL may be a promising candidate compound with better anti-amnesic effects and pharmacokinetic characteristics for the treatments of AD and related diseases.
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Affiliation(s)
- Shu-Ping Li
- Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine and The MOE Key Laboratory for Standardization of Chinese Medicines and The SATCM Key Laboratory for New Resources and Quality Evaluation of Chinese Medicine, Shanghai, China
| | - Yu-Wen Wang
- Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine and The MOE Key Laboratory for Standardization of Chinese Medicines and The SATCM Key Laboratory for New Resources and Quality Evaluation of Chinese Medicine, Shanghai, China
| | - Sheng-Lan Qi
- Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine and The MOE Key Laboratory for Standardization of Chinese Medicines and The SATCM Key Laboratory for New Resources and Quality Evaluation of Chinese Medicine, Shanghai, China
| | - Yun-Peng Zhang
- Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine and The MOE Key Laboratory for Standardization of Chinese Medicines and The SATCM Key Laboratory for New Resources and Quality Evaluation of Chinese Medicine, Shanghai, China
| | - Gang Deng
- Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine and The MOE Key Laboratory for Standardization of Chinese Medicines and The SATCM Key Laboratory for New Resources and Quality Evaluation of Chinese Medicine, Shanghai, China
| | - Wen-Zheng Ding
- Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine and The MOE Key Laboratory for Standardization of Chinese Medicines and The SATCM Key Laboratory for New Resources and Quality Evaluation of Chinese Medicine, Shanghai, China
| | - Chao Ma
- Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine and The MOE Key Laboratory for Standardization of Chinese Medicines and The SATCM Key Laboratory for New Resources and Quality Evaluation of Chinese Medicine, Shanghai, China
| | - Qi-Yan Lin
- Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine and The MOE Key Laboratory for Standardization of Chinese Medicines and The SATCM Key Laboratory for New Resources and Quality Evaluation of Chinese Medicine, Shanghai, China
| | - Hui-Da Guan
- Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine and The MOE Key Laboratory for Standardization of Chinese Medicines and The SATCM Key Laboratory for New Resources and Quality Evaluation of Chinese Medicine, Shanghai, China
| | - Wei Liu
- Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine and The MOE Key Laboratory for Standardization of Chinese Medicines and The SATCM Key Laboratory for New Resources and Quality Evaluation of Chinese Medicine, Shanghai, China
| | - Xue-Mei Cheng
- Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine and The MOE Key Laboratory for Standardization of Chinese Medicines and The SATCM Key Laboratory for New Resources and Quality Evaluation of Chinese Medicine, Shanghai, China.,Shanghai R&D Centre for Standardization of Chinese Medicines, Shanghai, China
| | - Chang-Hong Wang
- Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine and The MOE Key Laboratory for Standardization of Chinese Medicines and The SATCM Key Laboratory for New Resources and Quality Evaluation of Chinese Medicine, Shanghai, China.,Shanghai R&D Centre for Standardization of Chinese Medicines, Shanghai, China
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Li SF, Zhang XT, Qi SL, Ye YT, Cao H, Yang YQ, McElwee KJ, Zhang X. Allergy to dust mites may contribute to early onset and severity of alopecia areata. Clin Exp Dermatol 2014; 40:171-6. [PMID: 25252126 DOI: 10.1111/ced.12471] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/26/2014] [Indexed: 12/18/2022]
Abstract
BACKGROUND A higher risk of allergic diseases such as rhinitis, asthma and atopic eczema (atopic dermatitis) has been reported for patients with alopecia areata (AA) compared with the general population, but the significance of this is still largely unclear. AIM To determine whether serum total or specific IgE play a role in the onset and severity of AA. METHODS We tested 461 serum samples from 351 patients with AA and 110 healthy controls (HC) for total IgE (tIgE) and specific IgE (sIgE) by ImmunoCAP-100 or in vitro test (IVT). RESULTS The absolute value of tIgE was higher in patients with AA than in normal controls (P < 0.001), although the prevalence of raised tIgE (> 120 IU/mL) detected in patients with AA (29.3%) was similar to that of HC (21.8%). Prevalences of raised sIgE against various allergens detected by ImmunoCAP-100 showed that Dermatophagoides pteronyssinus (Der p; 31.1%) and Dermatophagoides farinae (Der f; 29.0%) were the most common allergens. Similar results were found by IVT, with the most common response being against Der p/Der f (29.0%). However, the prevalences of tIgE and sIgE against dust mites (Der p and Der f) in patients with early-onset AA and severe AA were significantly higher than those with late-onset AA and mild AA (P = 0.02, P = 0.02 vs. P = 0.03 and P = 0.001, respectively). Notably, the increases in tIgE and sIgE were independent of atopy history. CONCLUSIONS Allergy to dust mites may have an effect on the immune response in AA, and may contribute to its early onset and severity in patients of Chinese origin.
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Affiliation(s)
- S F Li
- Department of Dermatology, First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
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Lv Y, Cao LH, Pang H, Lu LN, Li JL, Fu Y, Qi SL, Luo Y, Li-Ling J. Combined genetic and imaging diagnosis for two large Chinese families affected with Pelizaeus-Merzbacher disease. Genet Mol Res 2012; 11:2035-44. [PMID: 22911587 DOI: 10.4238/2012.august.6.7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Pelizaeus-Merzbacher disease (PMD) is a rare X-linked recessive disorder characterized by nystagmus, impaired motor development, ataxia, and progressive spasticity. Genetically defective or altered levels of proteolipid protein (PLP1) or gap-junction alpha protein 12 gene have been found to be a common cause. Here we report on two large Han Chinese families affected with this disease. The probands of both families had produced sons featuring cerebral palsy that had never been correctly diagnosed. PMD was suspected after careful analysis of family history and clinical features. Three rounds of molecular testing, including RT-PCR, genetics linkage and SRY sequence analyses, in combination with fetal ultrasound and magnetic resonance imaging, confirmed the diagnosis. In Family 1, in addition to two patients, three carriers were identified, including one who was not yet married. Genetic testing indicated that a fetus did not have the disease. A healthy girl was born later. In Family 2, two patients and two carriers were identified, while a fetus was genetically normal. A healthy girl was born later. We concluded that by combining genetic testing and imaging, awareness of the symptoms of PMD and understanding of its molecular biology, there is great benefit for families that are at risk for producing offspring affected with this severe disease.
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Affiliation(s)
- Y Lv
- Department of Medical Genetics, School of Basic Medicine, China Medical University, Shenyang, China
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Qi SL, Zhang P, Zhang AL, Wang RZ, Xu LX. Performance evaluation of a novel liquid nitrogen cryoprobe. Conf Proc IEEE Eng Med Biol Soc 2007; 2006:486-9. [PMID: 17282222 DOI: 10.1109/iembs.2005.1616453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
A novel liquid nitrogen cryoprobe is developed in the present study. The inlet, handle, the vapor-liquid separator and the heat transfer segment of the cryoprobe are designed to be detachable. This flexible construction provides many distinct features, such as good maneuverability, high safety and low cost. A new vapor-liquid separator is made to ensure the free flow of the liquid nitrogen and increase the probe freezing capacity. The wall temperatures at the different locations along the cryoprobe are measured in the air, gel and brine, with the various driven pressure ranging from 0.3 to 0.6 MPa. The results are compared to the other probe. It is found that the precooling time of the probe is shortened significantly. The present cryoprobe offers better cooling performance to the existing cryoprobe. The heat flux transferred from the surrounding air or brine to the cryoprobe is estimated, and it is concluded that the boiling pattern in the probe is the film boiling and suggestions for further improvement of the cryoprobe's performance is made based on the analysis.
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Affiliation(s)
- S L Qi
- Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai 200030, P R China
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Wan JH, Zhang SJ, Mi JX, Qi SL, Wu KF, Gan F, Yang BQ, Xu LJ, Xu LZ. Establishment of a group of murine leukemic cell lines and investigation of their biological characteristics. Sci China B 1989; 32:1087-98. [PMID: 2803526] [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: 01/02/2023]
Abstract
An in vitro-vivo technique for establishment of cell lines on murine leukemia has been developed. Using this method, suppressive T lymphoblastic leukemia L7811-85, L7212-85, non-T, non-B lymphocytic leukemia L1210-86, B lymphocytic leukemia P 388-86 and Friend erythroleukemia FLCL cell lines have been established. Incidence of leukemia with these cell lines was 100%. Along with the increase of generations of cell lines, cell growth accelerated, generation time shortened and cloning efficiencies rose. A following up electron microscopic observation on L7811-85 and L7212-85 showed that the virus particles were "A" particles in original cells. When they became cell lines in vitro, virus particles increased and transformed into typical "C" particles with budding. An inhibitory activity relevant to leukemic cells on proliferation of leukemic cells has been observed in the supernatant of L7811-85 medium and was regarded as an "autocrine".
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Affiliation(s)
- J H Wan
- Institute of Hematology, Chinese Academy of Medical Sciences, Tianjin
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Qi SL. [Ultrastructural changes in hemopoietic microenvironment and hemopoietic cells in bone marrow of aplastic anemia]. Zhongguo Yi Xue Ke Xue Yuan Xue Bao 1988; 10:393-6. [PMID: 2978392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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Qi SL, Yang CL, Hu WW, Su YL, Hu XL. Pathological changes in red cell series: electron microscopic study on bone marrow cells of some blood disorders. Chin Med J (Engl) 1987; 100:34-7. [PMID: 3109822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
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Abstract
Protein kinase NII has a alpha alpha' beta 2 subunit structure, and consists of a chromatographically heterogeneous population. By two-dimensional polyacrylamide gel electrophoresis, each subunit was resolved into multiple polypeptides with various pI values: alpha subunit, 4 spots; alpha' subunit, 10 spots; and beta subunit, 4 spots. NII underwent autophosphorylation on beta subunits. Fractions of alpha and alpha' polypeptides also occurred as phosphoforms as shown by alkaline phosphatase treatment. In addition, alpha' subunit had another motif for heterogeneity, which separated alpha' polypeptides into two groups, and was exemplified by NIIa and NIIb that showed different enzyme kinetics and the nuclear localization. We interpret these to account for the basis of the functional as well as molecular heterogeneities of protein kinase NII.
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Qi SL, Yang CL, Hu WW, Fu J, Liu JH. [Studies on the morphological structure of bone marrow under TEM, SEM and freeze cracking]. Zhongguo Yi Xue Ke Xue Yuan Xue Bao 1985; 7:298-300. [PMID: 2939993] [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: 01/03/2023]
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Hatayama T, Qi SL, Kim K, Ichiba K, Yukioka M. Caffeine-induced reorganization of DNA replicating system occurs on or near nuclear matrix in HeLa cells. Biochem Int 1984; 9:651-7. [PMID: 6240982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Since caffeine reorganizes the DNA replicating system, with several consequences, we studied the effect of caffeine on the DNA replication which normally occurs on or near the nuclear matrix in a variety of eukaryotic cells. When HeLa cells, treated with or without the DNA-damaging agent, neocarzinostatin, were postincubated in the presence or absence of caffeine and then pulse-labeled with [3H]thymidine, the DNA remaining tightly associated with the matrix was enriched in the newly synthesized DNA at the same level as that seen in untreated cells. The nuclear matrix-bound DNA polymerase alpha activity was also the same in these cells. Therefore, in the presence of caffeine, DNA replication, with or without DNA damage, also occurs on or near the nuclear matrix, as is the case in normal DNA replication.
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Abstract
Protein kinase NII from rat liver nuclei was resolved into two fractions, NIIa and NIIb, by DEAE-Sephadex column chromatography. NIIa was eluted at 151 mM (NH4)2SO4 and NIIb at 175 mM. They had an identical molecular size (125,000 daltons, 7.0S) and subunit composition (alpha alpha' beta 2). However, they showed significantly different Km values and turnover numbers for casein substrate. Furthermore, NIIa was found predominantly as a form bound to the chromatin, while NIIb was in the nucleoplasmic-soluble fraction in addition to the chromatin-bound fraction. These observations suggest that NII consists of a heterogeneous population of at least two molecular species, differing in the activity and functional states in the cell nucleus.
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Yukioka M, Sasaki S, Qi SL, Inoue A. Two species of histone acetyltransferase in rat liver nuclei. J Biol Chem 1984; 259:8372-7. [PMID: 6736037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
Subcellular localization of histone acetyltransferase was studied in rat liver cells. Two histone acetyltransferases, designated NI and NII, were identified in the nuclear fraction, and an additional two acetyltransferases, termed CI and CII, were separated from the cytoplasmic fraction. These acetyltransferases exhibited different substrate specificities toward free and nucleosomal histones. The enzymes NI and NII represented major histone acetyltransferase activities in rat liver nuclei, and they were further differentiated by DNA-binding properties, subnuclear localization, and reaction kinetics. While the NI enzyme exhibited an intersecting initial velocity kinetic, the NII enzyme followed a ping-pong initial velocity pattern. These results show the multiple occurrence of histone acetyltransferases in nuclear and cytoplasmic fractions, events which may reflect the complexities of histone acetylation.
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Qi SL. [Ultrastructure of marrow cells in preleukemia]. Zhonghua Yi Xue Za Zhi 1984; 64:414-6. [PMID: 6440681] [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: 01/20/2023]
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Yang CL, Yang WW, Qi SL, Yang TY, Wang YL. Subacute myelogenous leukemia. A special type of myelogenous leukemia. Chin Med J (Engl) 1982; 95:459-66. [PMID: 6813055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
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Qi SL. [Ultrastructure of leukemic cells in subacute granulocytic leukemia (author's transl)]. Zhonghua Nei Ke Za Zhi 1980; 19:39-41. [PMID: 6937342] [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: 01/22/2023]
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