1
|
Zhao JY, He YX, Wu ML, Wang RQ. The application of high-throughput sequencing technology in corneal diseases. Int Ophthalmol 2024; 44:53. [PMID: 38340174 PMCID: PMC10858842 DOI: 10.1007/s10792-024-03049-1] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Accepted: 01/18/2024] [Indexed: 02/12/2024]
Abstract
High-throughput sequencing technology, also known as next-generation sequencing technology, can explore new biomarkers and specific gene mutations. It has a pivotal role in promoting the gene research, which can limit the detection area, lessen the time needed for sequencing. Also, it can quickly screen out the suspected pathogenic genes of patients, gain the necessary genetic data, and provide the basis for clinical diagnosis and genetic counseling. In the research of corneal diseases, through the DNA sequencing of patients' diseased cells, it can provide a deeper understanding of corneal diseases and improve the diagnosis, classification and treatment alternatives of various corneal diseases. This article will introduce the application progress of high-throughput sequencing technology in corneal diseases, which will help to understand the application of this technology in various corneal diseases.
Collapse
Affiliation(s)
- Jing Yi Zhao
- The Second Clinical Medical College of Jilin University, Changchun, 130012, Jilin, China
| | - Yu Xi He
- The Eye Center, The Second Hospital of Jilin University, Changchun, 130041, Jilin, China
| | - Mei Liang Wu
- The Eye Center, The Second Hospital of Jilin University, Changchun, 130041, Jilin, China
| | - Rui Qing Wang
- The Eye Center, The Second Hospital of Jilin University, Changchun, 130041, Jilin, China.
| |
Collapse
|
2
|
Li XJ, He YX, Wu J, Zhang LY, Yang R, Ji WL, Zhu BL. [Determination of hydrazine in workplace air by gas chromatography with large bore capillary column]. Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi 2021; 39:296-299. [PMID: 33910293 DOI: 10.3760/cma.j.cn121094-20200401-00164] [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 determine hydrazine quantitatively in workplace air by gas chromatography with large bore capillary column. Methods: In October 2019, hydrazine in the air was adsorbed by acid silica gel tube sampling and desorped using sulfuric acid solution. After derivatization with furfural and extraction, the content of hydrazine was determined by DM-FFAP capillary column gas chromatography with flame ionization detector. Results: The linear regression equation was y=353.8x+21.2 (r=0.9998) between 0.1-2.0 μg/ml of target concentration. The detection limit was 0.030 μg/ml. The lower limit of quantification was 0.100 μg/ml. If 15 L air sample was collected, the minimum detection concentration was 0.004 mg/m(3) and the minimum quantitative concentration was 0.013 mg/m(3) respectively. The average desorption efficiency was 86.5%-89.4%. The recovery was 94.4%-97.1%. The relative standard deviation was 1.6%-4.9%. Hydrazine and furfural derivative was 2-furaldehyde hydrazine. Conclusion: The method has symmetrical peak shape of hydrazine derivatives chromatographic peaks, short analysis time, easy operation, and is suitable for the determination of the concentration of hydrazine in the air in the workplace.
Collapse
Affiliation(s)
- X J Li
- Jiangsu Provincial Center for Disease Prevention and Control, Nanjing 210009, China
| | - Y X He
- Jiangsu Provincial Center for Disease Prevention and Control, Nanjing 210009, China
| | - J Wu
- Jiangsu Provincial Center for Disease Prevention and Control, Nanjing 210009, China
| | - L Y Zhang
- Jiangsu Provincial Center for Disease Prevention and Control, Nanjing 210009, China
| | - R Yang
- Jiangsu Provincial Center for Disease Prevention and Control, Nanjing 210009, China
| | - W L Ji
- Jiangsu Provincial Center for Disease Prevention and Control, Nanjing 210009, China
| | - B L Zhu
- Global Health Center of Nanjing Medical University, Nanjing 211166, China
| |
Collapse
|
3
|
He YX, Li G, Liu Y, Tang H, Chong ZY, Wu XJ, Jin X, Zhang SY, Wang M. Endovascular treatment of visceral aneurysms and pseudoaneurysms. J BIOL REG HOMEOS AG 2021; 35:131-140. [PMID: 33567807 DOI: 10.23812/20-377-a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Visceral artery aneurysm (VAA) is a rare and potentially life-threatening condition, defined as true artery aneurysms and pseudoaneurysms of splanchnic circulation and renal artery. This study reports our experience in the diagnosis and endovascular treatment of visceral artery aneurysms (VAAs) over a 10-year period. Between 2008 and 2018, a total of 24 VAAs in 21 patients were diagnosed by clinical symptoms and a combination of imaging techniques, such as Doppler ultrasound, computed tomography angiogram, and catheter angiogram. All patients underwent endovascular treatment to exclude aneurysms. Oral antiplatelet medicine was administered, and imaging examination was performed during follow-up. Technical success was achieved in all 21 patients, and no periprocedural complications occurred. Endovascular coiling alone was employed in 10 aneurysms. Coiling was combined with gelfoam in 2 aneurysms. Coiling was assisted by stent in 4 aneurysms. Covered stents were deployed in 8 aneurysms individually. Clinical symptoms disappeared or highly improved in all patients after treatment. None of the patients showed recurrent symptoms after discharge. However, two cases with new aneurysms after 6 and 8 months, respectively, and one case with in-stent thrombosis after 12 months were reported during follow-up. This study may justify the efficacy of percutaneous endovascular coil embolization and stent deployment. It also provides beneficial experience about how to choose appropriate various endovascular strategies based on both clinical symptoms and aneurysm anatomy condition.
Collapse
Affiliation(s)
- Y X He
- Department of Vascular Surgery, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China
| | - G Li
- Department of Vascular Surgery, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China
| | - Y Liu
- Department of General Surgery, Qilu Hospital of Shandong University, Jinan, China
| | - H Tang
- Shandong Center for Disease Control and Prevention, Jinan, China
| | - Z Y Chong
- Department of Vascular Surgery, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China
| | - X J Wu
- Department of Vascular Surgery, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China
| | - X Jin
- Department of Vascular Surgery, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China
| | - S Y Zhang
- Department of Vascular Surgery, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China
| | - M Wang
- Department of Vascular Surgery, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China
| |
Collapse
|
4
|
He YX, Kang K, Jia GX. Effect of sarcopenia combined with platelet-rich plasma on transverse tibial bone transport in diabetic foot. J BIOL REG HOMEOS AG 2020; 34:1451-1457. [PMID: 32883065 DOI: 10.23812/20-203-l] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Affiliation(s)
- Y X He
- Department of Orthopaedics Trauma, The Third Hospital of Shijiazhuang, Shijiazhuang, China
| | - K Kang
- Department of Orthopaedics, The First Hospital of Hebei Medical University, Shijiazhuang, China
| | - G X Jia
- Department of Orthopaedics, The First Hospital of Hebei Medical University, Shijiazhuang, China
| |
Collapse
|
5
|
He YX, Yin J, Liu TT, Gao HM, Zhang R, Yao JF, Liu XY, Jia XL, Li XL, Li SL, Wu RH. [FGA gene variation causing congenital dysfibrinogenemia with recurrent arteriovenous thrombosis]. Zhonghua Er Ke Za Zhi 2020; 58:236-238. [PMID: 32135598 DOI: 10.3760/cma.j.issn.0578-1310.2020.03.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Affiliation(s)
- Y X He
- Hematology Oncology Center, Beijing Children's Hospital, Capital Medical University, Beijing 100045, China
| | - J Yin
- Department of Respiratory Diseases, Beijing Children's Hospital, Capital Medical University,Beijing 100045, China
| | - T T Liu
- Department of Emergency Surgery, Beijing Children's Hospital, CapitalmedicalUniversity, Beijing 100045, China
| | - H M Gao
- Department of Critical Care Medicine, Capital Medical University, Beijing Children's Hospital, Beijing 100045, China
| | - R Zhang
- Hematology Oncology Center, Beijing Children's Hospital, Capital Medical University, Beijing 100045, China
| | - J F Yao
- Hematology Oncology Center, Beijing Children's Hospital, Capital Medical University, Beijing 100045, China
| | - X Y Liu
- Department of Respiratory Diseases, Beijing Children's Hospital, Capital Medical University,Beijing 100045, China
| | - X L Jia
- Department of Critical Care Medicine, Capital Medical University, Beijing Children's Hospital, Beijing 100045, China
| | - X L Li
- Department of Emergency Surgery, Beijing Children's Hospital, CapitalmedicalUniversity, Beijing 100045, China
| | - S L Li
- Department of Emergency Surgery, Beijing Children's Hospital, CapitalmedicalUniversity, Beijing 100045, China
| | - R H Wu
- Hematology Oncology Center, Beijing Children's Hospital, Capital Medical University, Beijing 100045, China
| |
Collapse
|
6
|
Mou JM, Chen PF, He YX, Yip TL, Li WH, Tang J, Zhang HZ. Vessel traffic safety in busy waterways: A case study of accidents in western shenzhen port. Accid Anal Prev 2019; 123:461-468. [PMID: 27498240 DOI: 10.1016/j.aap.2016.07.037] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [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: 07/05/2015] [Revised: 07/06/2016] [Accepted: 07/26/2016] [Indexed: 06/06/2023]
Abstract
Throughout the world, busy waterways near large ports witness heavy vessel traffic in recent decades. The waterways are characterized by high risk in terms of loss of life, property, and pollution to environment. To facilitate maritime safety management with satisfactory efficiency and efficacy, the authors propose a framework of safety indexes to evaluate the risk level in busy waterways according to the accident severity, fatality rate and special indicators of maritime transportation. The safety indexes consist of Safety Evaluation Index (SEI) and Safety Warning Index (SWI), and are derived from the proposed risk criteria of Chinese vessel traffic. As a case study, data on vessel traffic accidents reported in the Western Shenzhen Port, South China from 1995 to 2015 are analyzed. The actual risk level of this area during the period is calculated under the framework. The implementation of the safety indexes indicate that the risk criteria and safety indexes are practicable and effective for the vessel traffic management. The methodology based on long-term accident data can significantly support the risk analysis in the macroscopic perspective for busy ports and waterways, such that SWI can act as threshold to trigger actions, while SEI can act as an indicator to measure safety status.
Collapse
Affiliation(s)
- J M Mou
- Hubei Key Laboratory of Inland Shipping Technology, Wuhan, China; Wuhan University of Technology, Wuhan, China.
| | - P F Chen
- Hubei Key Laboratory of Inland Shipping Technology, Wuhan, China; Wuhan University of Technology, Wuhan, China
| | - Y X He
- Hubei Key Laboratory of Inland Shipping Technology, Wuhan, China; Wuhan University of Technology, Wuhan, China
| | - Tsz Leung Yip
- C.Y. Tung International Centre for Maritime Studies, Department of Logistics and Maritime Studies, Faculty of Business, Hong Kong Polytechnic University, Hong Kong
| | - W H Li
- Shenzhen Maritime Safety Administration, Shenzhen, China
| | - J Tang
- Shenzhen Maritime Safety Administration, Shenzhen, China
| | - H Z Zhang
- Shenzhen Maritime Safety Administration, Shenzhen, China
| |
Collapse
|
7
|
Li XJ, He YX, Zhu BL. [Simultaneous determination of 21 organophosphrous pesticides in human serum by QuEChERS-gas chromatography-mass spectrometry]. Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi 2018; 36:378-381. [PMID: 29996391 DOI: 10.3760/cma.j.issn.1001-9391.2018.05.019] [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: A method for the simultaneous determination of organophosphrous pesticides inhuman serum was developed. Methods: Using C18 and PSA as absorbent, 21 organophosphrous pesticides including methamidophos, dichlorvos, acephate, Omethoate, demeton and etc. in human serum were determined by combing QuEChERS with GC-MS, organophosphrous pesticides were qualitatedsimultaneously by retention time and characteristic ions. Their contents were determined by internal standard method of quantitative ions. Results: The linear range was from0to 0.60μg/ml with a good correlation coefficients (r ≥ 0.9961) . The LODs of this methodranged from 0.0009 to 0.0111 μg/ml. The average recoveries of3 organophosphrous pesticides (methamidophos、dichlorvos and acephate) ranged from 71.8%~85.3%, The average recoveries of other 18 organophosphrous pesticidesranged from 82.9%~102.9%. The relative standard deviations were0.8%~7.0%. Conclusion: The convenient operation and versatility of this method are suitable forthe fast screening and accurate detection of 21 organophosphrous pesticides in human serum.
Collapse
Affiliation(s)
- X J Li
- Jiangsu. Provincial Center for Disease Prevention and Control, Nanjing 210009, China
| | | | | |
Collapse
|
8
|
Gong L, Song DD, Wu JB, Cao MH, Su B, Sun Y, Lyu Y, Zhang L, Wang F, He YX, Wang JS. Human-to-human transmissions of severe fever with thrombocytopenia syndrome virus in Anhui province, 2010-2017. Clin Microbiol Infect 2018; 24:920-922. [PMID: 29559391 DOI: 10.1016/j.cmi.2018.03.014] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Revised: 03/10/2018] [Accepted: 03/10/2018] [Indexed: 11/30/2022]
Affiliation(s)
- L Gong
- Anhui Provincial Center for Disease Control and Prevention, Anhui, China.
| | - D D Song
- Anhui Provincial Center for Disease Control and Prevention, Anhui, China
| | - J B Wu
- Anhui Provincial Center for Disease Control and Prevention, Anhui, China
| | - M H Cao
- Anhui Provincial Center for Disease Control and Prevention, Anhui, China
| | - B Su
- Anhui Provincial Center for Disease Control and Prevention, Anhui, China
| | - Y Sun
- Anhui Provincial Center for Disease Control and Prevention, Anhui, China
| | - Y Lyu
- Lu'an Municipal Center for Disease Control and Prevention, Lu'an, China
| | - L Zhang
- Hefei Municipal Center for Disease Control and Prevention, Hefei, China
| | - F Wang
- Wuhu Municipal Center for Disease Control and Prevention, Wuhu, China
| | - Y X He
- Tongling Municipal Center for Disease Control and Prevention, Tongling, China
| | - J S Wang
- Anqing Municipal Center for Disease Control and Prevention, Anqing, China
| |
Collapse
|
9
|
He YX, Zhu Y, Yang LJ, Wang F. [Research progress of NDRG1 in molecular mechanism of tumor invasion and metastasis]. Zhonghua Bing Li Xue Za Zhi 2018; 47:75-78. [PMID: 29325260 DOI: 10.3760/cma.j.issn.0529-5807.2018.01.019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
10
|
Li C, Cai YC, Wang W, He YX, Lan XJ, Li QL, Zhou YQ, Liu JF, Zhu GQ, Liu K, Wang SX, Wang K, Fan JC, Sun RH. [The role definition of lateral arm free flap in reconstruction after head and neck cancer surgery]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2016; 51:156-60. [PMID: 26898882 DOI: 10.3760/cma.j.issn.1673-0860.2016.02.023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Application of free flap is one of the important repair means in head and neck surgery. A variety of free flaps, such as anterolateral thigh flap, have showed unique advantages in repair for tissue defects after resection of head and neck tumor, and have became increasing popularity. Lateral arm flee flap is an important repair means in plastic surgery, which has developed more than 30 years, but the application of this flap for reconstruction in head and neck surgery is relatively backward, with few reports. This review focuses on the creativity and innovation, the relationship between anatomy and clinical application, and the application status and prospects for lateral arm flee flap in individual head and neck reconstruction surgery.
Collapse
Affiliation(s)
- C Li
- Department of Head and Neck Surgery, Sichuan Cancer Hospital, Chengdu 610041, China
| | - Y C Cai
- Department of Head and Neck Surgery, Sichuan Cancer Hospital, Chengdu 610041, China
| | - W Wang
- Department of Head and Neck Surgery, Sichuan Cancer Hospital, Chengdu 610041, China
| | - Y X He
- Graduate School, Southwest Medical University, Luzhou 646000, China
| | - X J Lan
- Graduate School, Guangxi Medical University, Nanning 530000, China
| | - Q L Li
- Graduate School, Southwest Medical University, Luzhou 646000, China
| | - Y Q Zhou
- Graduate School, Chengdu Medical College, Chengdu 610500, China
| | - J F Liu
- Department of Head and Neck Surgery, Sichuan Cancer Hospital, Chengdu 610041, China
| | - G Q Zhu
- Department of Head and Neck Surgery, Sichuan Cancer Hospital, Chengdu 610041, China
| | - K Liu
- Department of Head and Neck Surgery, Sichuan Cancer Hospital, Chengdu 610041, China
| | - S X Wang
- Department of Head and Neck Surgery, Sichuan Cancer Hospital, Chengdu 610041, China
| | - K Wang
- Graduate School, Southwest Medical University, Luzhou 646000, China
| | - J C Fan
- Department of Head and Neck Surgery, Sichuan Cancer Hospital, Chengdu 610041, China
| | - R H Sun
- Department of Head and Neck Surgery, Sichuan Cancer Hospital, Chengdu 610041, China
| |
Collapse
|
11
|
Wu MN, He YX, Guo F, Qi JS. Alpha4beta2 nicotinic acetylcholine receptors are required for the amyloid beta protein-induced suppression of long-term potentiation in rat hippocampal CA1 region in vivo. Brain Res Bull 2008; 77:84-90. [PMID: 18602971 DOI: 10.1016/j.brainresbull.2008.06.005] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2008] [Revised: 06/06/2008] [Accepted: 06/08/2008] [Indexed: 11/26/2022]
Abstract
Amyloid beta protein (Abeta) is thought to be responsible for the deficit of learning and memory in Alzheimer's disease (AD), possibly through interfering with synaptic plasticity such as hippocampal long-term potentiation (LTP). Nicotinic acetylcholine receptors (nAChRs) participate in various cognitive brain functions. However, it is unclear whether nAChRs, especially alpha4beta2 subtype nAChRs, are involved in Abeta-induced impairment of hippocampal LTP. The present study investigates a possible role of nAChRs during the impairment of LTP by Abeta. Our results showed that: (1) intracerebroventricular injection of Abeta(1-40), Abeta(25-35) or Abeta(31-35) significantly suppressed high-frequency stimulation-induced LTP, while Abeta(35-31), a reversed sequence of Abeta(31-35), have no effect on the LTP; (2) epibatidine, a specific agonist of alpha4beta2 subtype of nAChRs, dose-dependently suppressed the induction of LTP; (3) co-injection of epibatidine together with Abeta(31-35) did not further enhance the suppression of LTP induced by Abeta(31-35) or epibatidine alone; (4) dihydro-beta-erythroidine, a selective antagonist against alpha4beta2 subtype of nAChRs, showed no effect on the induction of LTP, but significantly reversed Abeta(31-35)-induced LTP impairment. These results indicate that: (1) sequence 31-35 in Abeta molecule might be a shorter active center responsible for the neurotoxicity of full length of Abeta; (2) alpha4beta2 subtype of nAChRs is required for the suppressive action of Abeta on the hippocampal LTP in vivo. Thus, the present study provides further insight into the mechanisms by which Abeta impairs synaptic plasticity and cognitive function in the AD brain.
Collapse
Affiliation(s)
- M N Wu
- Department of Neurobiology and the national key discipline of physiology, Shanxi Medical University, Taiyuan, Shanxi 030001, PR China
| | | | | | | |
Collapse
|
12
|
Abstract
Control of schistosomiasis caused by Schistosoma japonicum has been severely hindered by the fact that several non-human mammalian species, including domesticated as well as wild animals, serve as zoonotic carriers of this infection. For effective control, it is imperative that the full host spectrum of this infection is understood. Although about 46 species of mammals are known to carry natural infection with S. japonicum, only a few might be of potential threat to human infection. Generally, in an endemic area, transmission of schistosomiasis to human depends largely on the availability and abundance of permissive hosts. Another important factor that needs to be taken into consideration in developing control measures against S. japonicum is potential strain differences. This review collates pertinent host-parasite relationship of S. japonicum in mammals in an endemic area and assesses the epidemiological significance of these findings for human infection.
Collapse
Affiliation(s)
- Y X He
- Department of Biomedical Sciences, College of Medicine, University of Illinois, Rockford, IL 61107, USA.
| | | | | |
Collapse
|
13
|
Hong X, Li FZ, Yin ZY, Yan PH, He YX. [The change of vWF in vascular endothelial cells under different stress]. Zhongguo Ying Yong Sheng Li Xue Za Zhi 2000; 16:310-3. [PMID: 11236684] [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: 02/19/2023]
Abstract
AIM To correlate the injury of vascular endothelial cells during various pathological conditions with the change of vWF (von Willebrand Factor) in different VEC lines. METHODS Flow cytometer(FCM) were used to defect the immunoflourescent stained vWF in pulmonary artery endothelial cells (PAEC) of pig and aortic endothelial cells(AEC) of rats. RESULTS The positive rates of vWF in PAEC of pigs is similar with that in AEC of rats under normal condition, but it decreased differently after hypoxic or cold injury. It was very interesting that the mean fluorescence intensity of positive PAEC or AEC exposed to hypoxia or cold elevated significantly compared with those of control. CONCLUSIONS The change of vWF in VEC can be used to evaluate the function of VEC under different stress.
Collapse
Affiliation(s)
- X Hong
- Institute of Health and Environmental Medicine, Academy of Military Medical Sciences, Tianjin 300050
| | | | | | | | | |
Collapse
|
14
|
Ramaswamy K, Kumar P, He YX. A role for parasite-induced PGE2 in IL-10-mediated host immunoregulation by skin stage schistosomula of Schistosoma mansoni. J Immunol 2000; 165:4567-74. [PMID: 11035098 DOI: 10.4049/jimmunol.165.8.4567] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Significant quantities of PGE(2) were produced by cercariae of Schistosoma mansoni following incubation with linoleic acid, a free fatty acid found on the surface of the skin. Cyclooxygenase (COX) 2 inhibitors failed to block this PGE(2) production, suggesting that a different biochemical pathway may be involved in the production of PGE(2) by the parasite. In addition, the parasites were also able to induce PGE(2) and IL-10 from human and mouse keratinocytes. Analysis of mouse skin during skin migratory phases of infection confirmed these in vitro observations. COX2 inhibitors blocked the parasite-induced PGE(2) and IL-10 from keratinocytes. Further analysis of the parasite secretions showed that the PGE(2)/IL-10-inducing effect was associated with a fraction <30 kDa molecular size. Addition of this fraction or parasite-stimulated keratinocyte culture supernatant to Con A-stimulated spleen cells resulted in the suppression of cell proliferation. This effect could be blocked by anti-IL-10 treatment. In sharp contrast, attenuation of the parasites with gamma-irradiation significantly abrogated their ability to induce PGE(2) or IL-10 from skin cells. Significance of IL-10 in host immunoregulation by skin stage schistosomula of S. mansoni was further confirmed by using IL-10-deficient mice. In these mice the normal subdued cutaneous reaction to the parasite was absent. Instead, a prominent cellular reaction occurred around the parasite, and there was considerable delay in parasitic migration through the skin. Thus these results suggest a key role for parasite-induced PGE(2) in IL-10-dependent down-regulation of host immune responses in the skin.
Collapse
Affiliation(s)
- K Ramaswamy
- Department of Biomedical Sciences, College of Medicine, University of Illinois, Rockford, IL 61107, USA.
| | | | | |
Collapse
|
15
|
Salafsky B, He YX, Li J, Shibuya T, Ramaswamy K. Short report: study on the efficacy of a new long-acting formulation of N, N-diethyl-m-toluamide (DEET) for the prevention of tick attachment. Am J Trop Med Hyg 2000; 62:169-72. [PMID: 10813468 DOI: 10.4269/ajtmh.2000.62.169] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
The beneficial effects of N, N-diethyl-m-toluamide (DEET) against biting insects of human and animals appear to last <6 hr after a single application to the skin. To prolong the repellent effects of DEET, recently we developed a new long-acting formulation of DEET called LIPODEET. This preparation was retained in the skin for a longer duration of time with minimal systemic absorption. In this study, we have evaluated the protective effect of three compounds (DEET, LIPODEET, and Morpel 220) against attachment of two species of ticks (Amblyomma americanum and Dermacentor variabilis) to rabbit ears. Results show that LIPODEET and Morpel 220 were highly effective in preventing tick attachment to the skin for a longer duration of time (up to 72 hr) than DEET after a single application. Moreover, LIPODEET was found to be acaricidal to both the species of ticks.
Collapse
Affiliation(s)
- B Salafsky
- Department of Biomedical Sciences, College of Medicine, University of Illinois, Rockford 61107, USA
| | | | | | | | | |
Collapse
|
16
|
Salafsky B, Ramaswamy K, He YX, Li J, Shibuya T. Development and evaluation of LIPODEET, a new long-acting formulation of N, N-diethyl-m-toluamide (DEET) for the prevention of schistosomiasis. Am J Trop Med Hyg 1999; 61:743-50. [PMID: 10586906 DOI: 10.4269/ajtmh.1999.61.743] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
N, N-diethyl-m-toluamide (DEET) is a common and fairly safe active ingredient in many insect repellents. Our recent studies showed that when applied to the skin, DEET has a potent anti-parasitic effect against Schistosoma mansoni. However, the beneficial effects of DEET lasted only for a few minutes, presumably due to its rapid absorption through the skin. In this study, we evaluated different carrier formulations that prolong the activity of DEET in the skin. Among the various formulations analyzed, DEET incorporated into liposomes (LIPODEET) appeared to prolong the activity of DEET for more than 48 hr after a single application. Furthermore, LIPODEET was found to be minimally absorbed through the skin and loss due to washing off was limited. These findings thus suggest LIPODEET is a safe and long-acting formulation of DEET that is quite effective against schistosomiasis.
Collapse
Affiliation(s)
- B Salafsky
- Department of Biomedical Sciences, College of Medicine, University of Illinois, Rockford 61107-1897, USA
| | | | | | | | | |
Collapse
|
17
|
Salafsky B, Ramaswamy K, He YX, Anderson GL, Nowicki DK, Shibuya T. Evaluation of N,N-diethyl-m-toluamide (DEET) as a topical agent for preventing skin penetration by cercariae of Schistosoma mansoni. Am J Trop Med Hyg 1998; 58:828-34. [PMID: 9660474 DOI: 10.4269/ajtmh.1998.58.828] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
The effect of skin application of N,N-diethyl-m-toluamide (DEET) on the penetration and migration behavior of cercariae of Schistosoma mansoni was evaluated in vitro and in vivo in a mouse model. These studies showed that DEET at concentrations of 7.5% or higher was 100% effective in immobilizing and killing cercariae of S. mansoni in vitro. Ultrastructural studies on such DEET-exposed cercariae showed transformative and degenerative changes involving both tegument and deeper parenchymal structures. Fatal tissue lesions were evident as early as 5 min postexposure to DEET, and became more extensive with increasing exposure time. Cutaneous application of DEET (as a pure chemical in isopropanol or as a commercial insect repellent preparation) was more than 99% effective in preventing entry of S. mansoni cercariae into the mouse tail skin. Radiolabeling and tracer studies confirmed that 7.5% DEET applied to the skin prior to infection was highly effective in preventing schistosomular migration to the lungs.
Collapse
Affiliation(s)
- B Salafsky
- Department of Biomedical Sciences, College of Medicine, University of Illinois, Rockford 61107, USA
| | | | | | | | | | | |
Collapse
|
18
|
Ramaswamy K, He YX, Salafsky B. ICAM-1 and iNOS expression increased in the skin of mice after vaccination with gamma-irradiated cercariae of Schistosoma mansoni. Exp Parasitol 1997; 86:118-32. [PMID: 9207742 DOI: 10.1006/expr.1997.4178] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Host responses to migrating schistosomula of Schistosoma mansoni were compared in the skin of naive, multiply infected, or vaccinated (with gamma-irradiated cercariae) mice during the first 72 hr after cercarial penetration. Cellular response to the migrating parasite was minimal in the skin of naive mice for up to 72 hr after infection. In sharp contrast, the multiply infected or vaccinated animals exhibited a marked inflammatory response in the skin as early as 8 hr after cutaneous penetration of the challenge cercariae. This early inflammatory response in the skin of sensitized animals was characterized by a significant increase in the number of infiltrating cells, predominantly mononuclear cells and neutrophils. Increased exudation of serum proteins was also present in the skin of sensitized animals in areas of cercarial challenge. A time course of analyses revealed that mononuclear cell numbers increased significantly in the skin of vaccinated animals as early as 60 min after a challenge infection and continued to be present at a significantly higher level up to 72 hr after challenge. Peak neutrophil responses occurred in the skin at 24 hr (in multiply infected animals) and at 48 hr (in vaccinated animals) after a challenge infection. Along with the massive cellular infiltration there was an increased tissue expression of ICAM-1 and mRNA for iNOS in the skin of sensitized animals. Further analysis showed that in sensitized animals increased ICAM-1 expression was predominantly found on endothelial cells lining dermal capillaries, especially in areas around schistosomular migration and on cells that surrounded schistosomula in the dermis. In naive animals, however, a similar infection did not induce any ICAM-1 expression or iNOS production in the skin. Thus, an ICAM-1 mediated early accumulation of mononuclear cells in the skin and local production of nitric oxide may be important for the initial cutaneous inflammatory immune responses to migrating schistosomula of S. mansoni in vaccinated animals. On the contrary, in naive animals a potential parasite-induced suppression of ICAM-1 may play an important role in reducing cellular reaction in the skin and consequently help the parasite evade immune responses in the skin.
Collapse
Affiliation(s)
- K Ramaswamy
- Department of Biomedical Sciences, College of Medicine, University of Illinois, Rockford 61107, USA
| | | | | |
Collapse
|
19
|
Xu JH, He YX, Shu ST, Wang LM. [An animal model for screening of antiallergic and antipruritic drugs]. Yao Xue Xue Bao 1996; 31:420-424. [PMID: 9275721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
4-Aminopyridine(4-AP) 1 mg.kg-1 sc at the scruff induced a licking response in mice. Antiallergic and antipruritic drugs, such as diphenhydramine HCl(20 mg.kg-1 ip), doxepin(12.5 mg.kg-1 ig), prednisone(10 mg.kg-1 ig), dexamethasone(10 mg.kg-1 ip), fluocinolone (applied to the surface of skin), Pi Yan Ping(applied to the surface of skin), disodium cromoglicate(400 mg.kg-1 ip), ketotifen(1 mg.kg-1 ip), etc. markedly inhibited the licking response elicited by 4-AP. The calcium antagonist nifedipine(500 mg.kg-1 lg) and the potassium channel opener minoxidil(400 mg.kg-1 ig) produced the same inhibitory effect. H2-receptor antagonist cimetidine(200 mg.kg-1 ip) and ranitidine(150 mg.kg-1 ip) showed no effect. Morphine HCl(10 mg.kg-1 ip) and diazepam(0.02 mg.kg-1 ip) exhibited antagonistic effect on the licking response induced by 4-AP, but phenobarbital(25 mg.kg-1 ip), pentobarbital(15 mg.kg-1 ip) and aspirin(300 mg.kg-1 ig) did not. These results indicate that many antiallergic or antipruritic drugs inhibited the licking response induced by 4-AP. The method of licking response elicited by 4-AP has the merit of simplicity and convenience and may be used for screening antiallergic and antipruritic drugs.
Collapse
Affiliation(s)
- J H Xu
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Zhejiang Medical University, Hangzhou
| | | | | | | |
Collapse
|
20
|
He YX, Mi X. Ultrastructural observations on cercaria of Schistosoma japonicum. Southeast Asian J Trop Med Public Health 1994; 25:501-8. [PMID: 7777916] [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: 01/27/2023]
Abstract
The present paper describes the ultrastructure of the surface topography, head organ, tegument, musculature, glandular system, primary alimentary tract and flame cells of the Chinese mainland strain of Schistosoma japonicum cercaria, as visualized with both scanning and transmission electron microscopes. The results not only illustrate the morphological features of the cercarial surface and its internal structure reflecting an adaptation to the aqueous habitat but also reveal the correlation between the morphological structure and physiological function.
Collapse
Affiliation(s)
- Y X He
- Institute of Parasitic Diseases, Chinese Academy of Preventive Medicine, Shanghai
| | | |
Collapse
|
21
|
Liu BC, He YX, Miao Q, Wang HH, You BR. The effects of tetrandrine (TT) and polyvinylpyridine-N-oxide (PVNO) on gene expression of type I and type III collagens during experimental silicosis. Biomed Environ Sci 1994; 7:199-204. [PMID: 7848548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
In the screening tests of drugs for silicosis in our laboratory, we found that TT, a type of alkaloid isolated from Stephania tetrandra, could inhibit the development of experimental silicosis of rats and the synthesis of collagen in rat lung. Chest X-rays of silicotic patients treated with TT for 1-3 years showed obvious changes. The silicotic nodules became smaller and shadows became clearer. PVNO was proved to have anti-silicotic effect on animal and clinically. This presentation reports the effect of them on collagen mRNA. Dot blot results showed that alpha 1 (I) and alpha 1 (III) mRNA levels increased significantly at 60 and 120 days after the rats were exposed to silica dust. The mRNA levels went down at 1 and 3 months after treated by TT and PVNO. In situ hybridization observation revealed that the silver grains of Type I and Type III collagen were scattered within the fibroblasts in cellular nodules and in thickened interstitium of silicosis tissue. The amounts of mRNA silver grains decreased in the lung tissue treated by TT and PVNO. It was suggested that TT and PVNO may inhibit the gene expression of collagen during silicosis.
Collapse
Affiliation(s)
- B C Liu
- Institute of Occupational Medicine, Beijing, China
| | | | | | | | | |
Collapse
|
22
|
He YX, Hu YQ, Yu QF, Ni CH, Xue HC, Qiu LS, Xie M. Strain complex of Schistosoma japonicum in the mainland of China. Southeast Asian J Trop Med Public Health 1994; 25:232-42. [PMID: 7855634] [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: 01/27/2023]
Abstract
The present paper deals with studies on the characteristics of Schistosoma japonicum isolated from five localities in the mainland of China. The following items were observed and compared including morphometric data, susceptibility of six mammalian hosts, prepatent period, compatibility between larvae and snail hosts, size of hepatic granuloma produced by eggs, immunoreactions in experimental animals, sensitivity to praziquantel, SDS-PAGE protein pattern and its antigenicity analysis, DNA hybridization and genetic variation and differentiation by analysis with multilocus enzyme electrophoresis. By means of these multidisciplinary methods, from morphological to molecular level, the following conclusions may be drawn from our results. The evidence indicates firstly that S. japonicum in the mainland of China comprises a strain complex with several components of geographically distributed strains. At least four distinct strains exist, ie Yunnan, Guangxi, Sichuan and Anhui-Hubei. Characteristics of each strain are distinct and the results of these studies lead to discussion on the problem of the intraspecific and interstrain differentiation of S. japonicum in the mainland of China.
Collapse
Affiliation(s)
- Y X He
- Institute of Parasitic Diseases, Chinese Academy of Preventive Medicine, Shanghai
| | | | | | | | | | | | | |
Collapse
|
23
|
He YX, He DX, Zhang HY. [Changes of osteocalcin levels in pregnant and postpartum women]. Zhonghua Fu Chan Ke Za Zhi 1994; 29:97-9, 125. [PMID: 8033636] [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: 01/28/2023]
Abstract
The concentration of plasma osteocalcin, or bone GLA protein (BGP), alkaline phosphatase (AKP), calcium and phosphate were measured in 142 pregnant women at various stages of pregnancy and postpartum, and also in another 47 healthy non-pregnant women as control. In contrast to the control group, plasma BGP level showed significant increase at second and third trimester (P < 0.01 and P < 0.001 respectively), with the peak level at immediate postpartum period and returned to normal in 5 days. Serum AKP level increased as pregnancy progress, and there was significant difference between the levels at the 3rd trimester and that at non-pregnant status (P < 0.01). This study demonstrated that there was marked bone metabolism changes during pregnancy, and it indicated that osteocalcin might play a role in the regulation of bone metabolism.
Collapse
Affiliation(s)
- Y X He
- Jishuitan Hospital, Beijing
| | | | | |
Collapse
|
24
|
Xue HC, Qiu LS, He YX, Zhang YH, Zhu CW. SDS-PAGE protein pattern and its antigenicity analysis of different isolates of Schistosoma japonicum in China. Chin Med J (Engl) 1994; 107:25-9. [PMID: 8187569] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
Homogenates prepared from S. japonicum adult worms of different isolates from Anhui, Hubei, Guangxi, Yunnan and Sichuan Provinces were analyzed by SDS-PAGE and enzyme linked immunoelectrotransfer blot (EITB) tested with rabbit anti-snails antibody. The results of SDS-PAGE indicated that with silver staining both male and female worms of Guangxi isolate showed some definite differences in their protein profile, namely, absence of one band between 50-75 kDa in male worms and marked reduction in quantity of > 110 and 30 kDa bands in female worms. There was no obvious difference among other isolates both in male and female worms. The EITB patterns were similar in S. japonicum of Anhui and Hubei, and it was also the case with isolates from Yunnan and Sichuan, except that Yunnan female worms had a distinct band at 84 kDa which could hardly be seen in EITB pattern of Sichuan female worms; female worms of Guangxi isolates also showed a distinct 84 kDa band. The EITB pattern of male worms from Guangxi isolates showed 2 main bands of MW > 130 kDa against anti-Anhui snail antiserum which corresponded with the result of male worms of Anhui isolates. But these bands could not be seen with male worms from isolates of Yunnan and Sichuan.
Collapse
Affiliation(s)
- H C Xue
- Institute of Parasitic Diseases, Chinese Academy of Preventive Medicine, Shanghai
| | | | | | | | | |
Collapse
|
25
|
He YX. Biology of Schistosoma japonicum. From cercaria penetrating into host skin to producing egg. Chin Med J (Engl) 1993; 106:576-83. [PMID: 8222905] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
The biology of the Chinese mainland strain of Schistosoma japonicum in mammalian phase of the life cycle has been studied in the past three decades. The mode of cercarial penetration is found to involve enzyme secretion and movement. The entry of schistosomulum into the blood vessel in the hypodermal connective tissue is evidenced after skin penetration. The growth and development of this fluke in mice and rabbits are investigated by physiological, histochemical and ultrastructural methods. The development of the fluke may be divided into eight stages. In the definitive host-range, at least 45 species and subspecies of 34 genera in 18 families of 7 mammalian orders have been demonstrated, and the susceptibility to infection in domestic animals is compared. The process of egg formation and embryonic development of this fluke are studied histologically and histochemically. It is suggested that the chemical nature of the egg shell should be a quinontanned protein system. The characteristics and dynamic changes of cytochemical substances in embryonation of eggs are described.
Collapse
Affiliation(s)
- Y X He
- Institute of Parasitic Diseases, Chinese Academy of Preventive Medicine, Shanghai
| |
Collapse
|
26
|
He YX, Hsü SY, Hsü HF. The Hoeppli phenomenon in schistosomiasis japonica: historical findings and additional investigation in bovines. Southeast Asian J Trop Med Public Health 1993; 24:74-9. [PMID: 8362312] [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: 01/30/2023]
Abstract
The present paper deals with a buried knowledge of the early findings of the Hoeppli phenomenon in cattle infected with Schistosoma japonicum together with a revised list of bovines and other mammalian species in which this phenomenon has been found. It was noted that the percentage of the mature-egg granulomas with positive Hoeppli phenomena varied with the species of bovines, ie, higher positive percentage in the more susceptible cattle than in the less susceptible buffalos. The radiating filaments in fringes of the phenomenon were also stronger in cattle than in buffalos.
Collapse
Affiliation(s)
- Y X He
- Institute of Parasitic Diseases, Chinese Academy of Preventive Medicine, Shanghai
| | | | | |
Collapse
|
27
|
He YX, Hu YQ, Yu QF. Sensitivity of different isolates of Schistosoma japonicum from China to praziquantel. Southeast Asian J Trop Med Public Health 1992; 23:261-3. [PMID: 1439978] [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: 12/27/2022]
Abstract
Groups of C57BL inbred mice infected with each of the 4 different isolates, (Anhui, Hubei, Sichuan and Yunnan) of Schistosoma japonicum from the mainland of China were treated with praziquantel (PZQ) and the parasiticidal effects were compared. Worm reduction rate was recorded to assess systematically the sensitivity of 4 different isolates to PZQ in the mouse. Three dosage-levels of PZQ, ie 150, 230 and 310 mg/kg body weight in single doses were used. The worm development rates of control groups infected with schistosomes from Anhui, Hubei, Sichuan and Yunnan were 75.5, 81.8, 81.5, and 83.0%, respectively. At the dosage-level of 150 mg/kg, the worm reduction rates for the 4 different isolates were 36.0, 33.9, 25.5 and 35.6%, respectively. At the dosage-level of 230 mg/kg, the rates were 47.1, 46.0, 38.1 and 47.7%, while at the dosage-level of 310 mg/kg, they were 59.3, 58.6, 50.8 and 61.7%, respectively. The results indicated that the worm reduction rate of the Sichuan isolate was lower than that of the other three isolates, however, the differences were not statistically significant, suggesting that schistosomes of Anhui, Hubei, Sichuan and Yunnan isolates bear resemblance in drug response.
Collapse
Affiliation(s)
- Y X He
- Chinese Academy of Preventive Medicine, WHO Collaborating Centre for Malaria, Schistosomiasis and Filariasis, Shanghai, People's Republic of China
| | | | | |
Collapse
|
28
|
He YX, Yu QF, Hu YQ. Parasitological and histopathological studies on rhesus monkeys infected with Chinese mainland strain of Schistosoma japonicum. Southeast Asian J Trop Med Public Health 1992; 23:254-60. [PMID: 1439977] [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: 12/27/2022]
Abstract
Fifteen rhesus monkeys were infected by cutaneous exposure each with 200 or 300 cercariae of Schistosoma japonicum. The dynamic distribution of schistosomula in the skin showed that 77-90% of them were found in the connective tissue, while 10-23% migrated in the hair follicles and sebaceous glands at different time intervals after cercarial penetration. Dead schistosomula recovered from the skin varied from 8.7% to 28.7%. The average rate of adult worm recovery was 74.4% and 61.3% in the 6th and 15th weeks of infection, thereafter the rate decreased to 32.3% and 9.0% in the 19th and 42nd weeks, respectively. The mean length of mature pair-worms was 13.2 +/- 2.3 mm in male and 18.0 +/- 1.9 mm in female 6 weeks of worm age. Afterwards the body length of females and their sexual gland diminished markedly. The mean prepatent period was 35.0 +/- 0.6 days. The average size of mature eggs in the feces was 86.6 +/- 5.4 x 64.3 +/- 3.6 microns, and the peak of eggs passage in the feces occurred between 7th and 15th weeks after infection, later on the number of eggs markedly decreased. Skin reaction to the primary infection was slight. The pathological changes observed in liver were chiefly cellular infiltration of portal spaces and the lesions produced by egg granulomas. The mean volume of single-egg granulomas of the productive stage in liver was 22.7 +/- 10.5 mm3 x 10(-3). The most intensive damages in the gastro-intestinal tract were observed in the large intestine.(ABSTRACT TRUNCATED AT 250 WORDS)
Collapse
Affiliation(s)
- Y X He
- Chinese Academy of Preventive Medicine, WHO Collaborating Centre for Malaria, Schistosomiasis and Filariasis, Shanghai, People's Republic of China
| | | | | |
Collapse
|
29
|
Wang YS, Shi YM, Wu ZY, He YX, Zhang BZ. Parkinson's disease in China. Coordinational Group of Neuroepidemiology, PLA. Chin Med J (Engl) 1991; 104:960-4. [PMID: 1800040] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
An epidemiological study on the incidence and prevalence of Parkinson's disease (PD) was carried out in 29 provinces, cities and autonomous regions in this country in 1986. The survey was conducted in 117 areas, and 566 patients with PD were found among 3,869,162 persons examined, giving a point prevalence for men and women of 16.9/10(5) and 12.4/10(5), with the highest prevalence after the fifth decade of age. The disease was most prevalent in the southern part of China, especially in Hunan and Guangxi provinces. The incidence was 1.5/10(5)/yr in 1986. Both the prevalence and incidence of PD in China are lower than those in the white race and Japanese.
Collapse
Affiliation(s)
- Y S Wang
- Department of Neurology, General Hospital of Shenyang Unit, PLA
| | | | | | | | | |
Collapse
|
30
|
He YX. Nervous system of Clonorchis sinensis as revealed by acetylcholinesterase activity. Southeast Asian J Trop Med Public Health 1991; 22:412-6. [PMID: 1818393] [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: 12/28/2022]
Abstract
The gross neuroanatomy of Clonorchis sinensis has been revealed by the localization of acetylcholinesterase, well known to be associated with the nervous system. The central nervous system is composed of two cerebral ganglia situated postero-dorsally to the pharynx and connected by a transverse commissure. These ganglia give off four pairs of nerves anteriorly and three pairs posteriorly. The anterior nerves contribute to the pharynx and to the formation of the circum-oral ring located in the oral sucker. The posterior nerves, of which the postero-ventral nerve cords are the most prominent, contribute to the innervation of the acetabulum, the gut, the reproductive organs and the excretory bladder. All the posterior nerve cords are connected by a number of transverse connections throughout their course forming a complicated nerve net. At least two types of nerve cells, bipolar and multipolar ones, were observed.
Collapse
Affiliation(s)
- Y X He
- Institute of Parasitic Diseases, Chinese Academy of Preventive Medicine, Shanghai
| |
Collapse
|
31
|
He YX, Guo YH, Ni CH, Xia F, Liu HX, Yu QF, Hu YQ. Compatibility between Oncomelania hupensis and different isolates of Schistosoma japonicum in China. Southeast Asian J Trop Med Public Health 1991; 22:245-8. [PMID: 1948286] [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: 12/29/2022]
Abstract
Oncomelania hupensis from six localities were used for infection with different isolates of Schistosoma japonicum in the mainland of China, ie Anhui in the east, Hubei in the center, Guangxi in the south, Sichuan in the West, Yunnan in the southwest and Fujian in the southeast. Snails from Anhui and Hubei were readily infected with the local isolate of S. japonicum and cross infection also took place readily between the snails and the schistosomes from these two places. Snails from Sichuan and Yunnan were refractory to infection with schistosome isolates from Hubei and Anhui, but the isolates from Sichuan and Yunnan were able to develop in snails from Hubei and Anhui. Though the Guangxi isolate developed readily in both Anhui and Guangxi snails, the average precercarial period in the former was significantly longer than in the latter. None of the other snails from Sichuan, Yunnan and Fujian became infected. On the other hand, snails from Guangxi infected with Anhui parasites also had a longer precercarial period than that in Anhui snails. Snails from Fujian were readily infected with the isolates from Anhui and Yunnan. The present results suggest that there might be different geographic strains of S. japonicum and their Oncomelania snail hosts in the mainland of China.
Collapse
Affiliation(s)
- Y X He
- Institute of Parasitic Diseases, Chinese Academy of Preventive Medicine, Shanghai
| | | | | | | | | | | | | |
Collapse
|
32
|
He YX, Hu YQ, Yu QF, Tang ZJ. Characteristics of different isolates of Schistosoma japonicum from China in the final hosts. Southeast Asian J Trop Med Public Health 1991; 22:240-4. [PMID: 1948285] [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: 12/29/2022]
Abstract
The present paper deals with the susceptibility of common laboratory animals, such as mouse, rat, hamster, jird, rabbit and rhesus monkey, to infection with different isolates of Schistosoma japonicum in the mainland of China under laboratory conditions. With the exception of the rat, all the animals under study were permissive hosts for different isolates though their worm recovery rates varied. The mean body length of pair-worms of the Yunnan isolate was considerably smaller than that of the Anhui, Hubei, Guangxi and Sichuan isolates, and the percentage of male specimens with 7 testes in the Yunnan isolate was also significantly less than that in the other 4 isolates. Judging from the egg index (width/length x 100), the eggs of the Sichuan isolate were broad and short in shape, giving a high index; those of Guangxi and Hubei isolates were oblong, giving the lowest index; the other two isolates from Yunnan and Anhui, lay between these two extremes. The mean prepatent periods were longer in mice, hamsters and rhesus monkeys infected with Yunnan and Guangxi isolates, than those with Sichuan isolate. A dendrogram of the 5 isolates of S. japonicum was constructed on the basis of similarity coefficients by means of fuzzy cluster analysis on the biological characters mentioned above. Our results provide evidence of the existence of different strains of S. japonicum in the mainland of China as shown by comparative studies of their characteristics in the final hosts.
Collapse
Affiliation(s)
- Y X He
- Institute of Parasitic Diseases, Chinese Academy of Preventive Medicine, Shanghai
| | | | | | | |
Collapse
|
33
|
He YX, Yu QF, Yu P, Mao CS, Hu YQ. Penetration of Schistosoma japonicum cercaria into host skin. Chin Med J (Engl) 1990; 103:34-44. [PMID: 2112441] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
The anterior part of Schistosoma japonicum cercaria is a specialized head organ which can slightly stretch out and retract. There are three different types of large unicellular glands in cercarial body, consisting of one head gland, 2 pairs of pre- and 3 pairs of postacetabular glands. These glands differ in position, gross feature, histochemistry and functions. Both polysaccharase and protease activities are demonstrated in the secretions from these glands. Mode of cercarial penetration is described in detail and the penetration is effected by a combination of lytic secretions and mechanical movements. The schematic representation of the process of cercarial penetration is presented. The dynamic distributions of schistosomula in skin at different time intervals after skin penetration in various mammalian hosts are shown. Some newly transformed schistosomula die while penetrating into the skin of 7 mammalian species and the mortality rate varies with the host species, and that can also be affected by the age of cercariae following emergence from the snail. Some physiological aspects between cercariae and newly transformed schistosomula are compared. In contrast to cercariae, schistosomula are saline-adapted and water-intolerant. They were modified histochemically and antigenically.
Collapse
Affiliation(s)
- Y X He
- Institute of Parasitic Diseases, Chinese Academy of Preventive Medicine, Shanghai
| | | | | | | | | |
Collapse
|
34
|
He YX, Hewlett E, Temeles D, Quesenberry P. Inhibition of interleukin 3 and colony-stimulating factor 1-stimulated marrow cell proliferation by pertussis toxin. Blood 1988; 71:1187-95. [PMID: 3129045] [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] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Pertussis toxin (PT) catalyzes the ADP-ribosylation of several guanine nucleotide-binding (G) proteins that are involved in the transduction of cell surface receptor-mediated signals. Involvement of such G-proteins in regulation of hematopoiesis by two growth factors, colony-stimulating factor-1 (CSF-1) and interleukin 3 (IL 3), was investigated using pertussis toxin. Continuous or pulse exposure of murine bone marrow cells to pertussis toxin inhibited CSF-1 or IL 3-induced colony formation by approximately 50%. Pertussis toxin inhibition was also demonstrated against partially separated marrow from 5-fluorouracil-treated mice. The toxin effect was blocked by heating (95 degrees C for 30 minutes), by antitoxin antibody and was not associated with increased cAMP levels in target cells. In experiments with murine marrow, toxin-mediated inhibition appeared to involve predominantly the macrophage lineage. IL 3 stimulation of proliferation of the murine marrow-derived factor-dependent cell line FDC-P1, as measured by 3H-TdR incorporation, and CSF-1 stimulation of pure populations of murine bone marrow derived macrophages, as measured by DNA content and cell number, was also inhibited. Analysis of the effects of pertussis toxin on the growth of single cells stimulated by IL 3 demonstrated that this inhibition involved a decreased growth rate rather than a toxic ablation of cells. Phorbol myristate acetate (PMA) stimulated FDC-P1 cells and was able to abrogate the PT inhibition of IL 3 stimulation of these cells, suggesting but not establishing that IL 3 may mediate its proliferative effects through activating protein kinase C.
Collapse
Affiliation(s)
- Y X He
- Department of Internal Medicine, University of Virginia School of Medicine, Charlottesville 22908
| | | | | | | |
Collapse
|
35
|
Zhu MJ, He YX, Zhu JD, Luo MQ, Wang SG. [Development of IPG-III impedance phlebography]. Zhongguo Yi Xue Ke Xue Yuan Xue Bao 1986; 8:276-81. [PMID: 2953475] [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]
|
36
|
Chen MF, Zhang QY, He YX. [Clinical significance of the estimation of serum and urinary beta 2-microglobulin in renal disease]. Zhonghua Nei Ke Za Zhi 1985; 24:603-6, 638-9. [PMID: 3912135] [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: 01/08/2023]
|
37
|
He YX. [Nursing of 71 patients with epidemic hemorrhagic fever]. Zhonghua Hu Li Za Zhi 1984; 19:328-30. [PMID: 6152681] [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: 01/18/2023]
|
38
|
Hsü SY, Xu ST, He YX, Shi FH, Shen W, Hsü HF, Osborne JW, Clarke WR. Vaccination of bovines against schistosomiasis japonica with highly irradiated schistosomula in China. Am J Trop Med Hyg 1984; 33:891-8. [PMID: 6486298 DOI: 10.4269/ajtmh.1984.33.891] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
Vaccination of Chinese bovines (cattle and buffaloes) against schistosomiasis japonica with 36 kR gamma-irradiated schistosomula was done for laboratory challenge and for field trials in China. Altogether, 61 bovines were used. All experimental animals were vaccinated 2-3 times with 10,000 irradiated schistosomula per time. For the laboratory challenge, all experimental and control cattle were challenged with 500 normal cercariae and each buffalo, with 2,000 cercariae. The laboratory-challenged bovines were killed after 54-57 days of challenge; the bovines for the field trial in the lightly endemic area, after 5 months in the field; and the bovines for the field trial in the heavily endemic area, after 58-63 days. When the animals were killed, the number of mature worms in the vaccinated (experimental) and non-vaccinated (control) animals was recorded and the percentage of worm reduction in each group was calculated. The first group, consisting of three vaccinated and three non-vaccinated cattle, was given a laboratory challenge; the worm reduction was 71.6%. The second group, consisting of two vaccinated and three non-vaccinated buffaloes, was also given a laboratory challenge; the worm reduction was 74.4%. The third group, consisting of seven vaccinated and eight non-vaccinated buffaloes, was utilized in a field trial in a lightly endemic area; the worm reduction was 75.6%. The fourth group, consisting of eight vaccinated and nine non-vaccinated cattle, and the fifth group, consisting of nine vaccinated and nine non-vaccinated buffaloes, were pastured in a heavily endemic area. The worm reduction was 65.1% in the fourth group and 75.7% in the fifth group.(ABSTRACT TRUNCATED AT 250 WORDS)
Collapse
|
39
|
Shen M, Ge HL, He YX, Song QL, Zhang HZ. Immunosuppressive action of Qinghaosu. Sci Sin B 1984; 27:398-406. [PMID: 6379875] [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: 05/21/2023]
Abstract
Qinghaosu, isolated and purified from the Chinese herb, Artemisia annua Linn, and identified as a sesquiterpene with a peroxide bridge and lactone structure, is a highly potent and non-toxic new antimalaria drug. This paper reports the immunosuppressive action of its water soluble derivative (hemisuccinate NA, QHS). The remarkable suppression by QHS of the in vitro 3HTdR incorporation by mitogen-stimulated mouse spleen cells and human peripheral lymphocytes, as well as the spontaneous incorporation by mouse thymocytes and blood cells from some leukemia patients is presented and its characteristics are described. The in vivo effect as shown by quantitative PFC is studied and the difference between the present in vitro and in vivo effects is investigated. The possible mechanism of inhibition and discrepancy in effects are discussed.
Collapse
|
40
|
Hsü SY, Hsü HF, Xu ST, Shi FH, He YX, Clarke WR, Johnson SC. Vaccination against bovine schistosomiasis japonica with highly X-irradiated schistosomula. Am J Trop Med Hyg 1983; 32:367-70. [PMID: 6837845 DOI: 10.4269/ajtmh.1983.32.367] [Citation(s) in RCA: 33] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Cercariae of the Chinese mainland strain of Schistosoma japonicum were used. Eighteen cattle, divided into six groups of three each, were immunized with schistosomula transformed from cercariae exposed to three different doses of X-irradiation (24, 36, and 48 kR). The immunization was given either once, twice, or thrice, and the number of immunizing schistosomula was 10,000 or more in each immunization. The immunized cattle were challenged with 500 normal cercariae. Five native cattle were similarly infected with normal cercariae as controls. All cattle were killed 32-33 days after challenge or infection, and the worms were obtained by perfusion. The mean worm reduction in the 18 experimental animals varied from 42.1 to 96.0%. The mean percent worm reduction of the six experimental groups varied from 54.8 to 87.1. The reduction was greater with increasing numbers of immunizations, and was higher in the groups immunized with schistosomula exposed to 36 kR than in those exposed to 24 or 48 kR. Statistical analyses showed that all immunized groups yielded significantly fewer worms than controls. However, the three doses of X-irradiation (24, 36, and 48 kR) had no significant effect for a fixed number of immunizations (1, 2, or 3). The means for both two and three immunizations were significantly different from the mean for one immunization, although they were not significantly different from each other.
Collapse
|
41
|
He YX. [Epidemiological survey of epidemic hemorrhagic fever in the Shenyang area]. Zhonghua Liu Xing Bing Xue Za Zhi 1982; 3:206-8. [PMID: 6136337] [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: 01/18/2023]
|
42
|
He YX. [Electrocardiograms of the mice with high frequency response and high paper speed (author's transl)]. Zhonghua Xin Xue Guan Bing Za Zhi 1981; 9:320-2. [PMID: 7341204] [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: 01/24/2023]
|
43
|
He YX, Huang DS, Hu YQ, Zhang YN, Zhu XH. [Comparison of characteristics of two strains of Paragonimus westermani in South Anhui (author's transl)]. Zhongguo Yi Xue Ke Xue Yuan Xue Bao 1981; 3:89-94. [PMID: 6458416] [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]
|
44
|
Ma JX, He YX. Scanning electron microscopy of Chinese (mainland) strain Schistosoma japonicum. Chin Med J (Engl) 1981; 94:63-70. [PMID: 6785027] [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: 01/21/2023] Open
|
45
|
He YX, Gong ZX, Ma JX. [Scanning and transmission electron microscopy of Schistosoma japonicum egg shell (author's transl)]. Zhongguo Yi Xue Ke Xue Yuan Xue Bao 1979; 1:144-6. [PMID: 263648] [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: 12/14/2022]
|