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Qiu C, Zhang JZ, Wu B, Xu CC, Pang HH, Tu QC, Lu YQ, Guo QY, Xia F, Wang JG. Advanced application of nanotechnology in active constituents of Traditional Chinese Medicines. J Nanobiotechnology 2023; 21:456. [PMID: 38017573 PMCID: PMC10685519 DOI: 10.1186/s12951-023-02165-x] [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: 09/01/2023] [Accepted: 10/16/2023] [Indexed: 11/30/2023] Open
Abstract
Traditional Chinese Medicines (TCMs) have been used for centuries for the treatment and management of various diseases. However, their effective delivery to targeted sites may be a major challenge due to their poor water solubility, low bioavailability, and potential toxicity. Nanocarriers, such as liposomes, polymeric nanoparticles, inorganic nanoparticles and organic/inorganic nanohybrids based on active constituents from TCMs have been extensively studied as a promising strategy to improve the delivery of active constituents from TCMs to achieve a higher therapeutic effect with fewer side effects compared to conventional formulations. This review summarizes the recent advances in nanocarrier-based delivery systems for various types of active constituents of TCMs, including terpenoids, polyphenols, alkaloids, flavonoids, and quinones, from different natural sources. This review covers the design and preparation of nanocarriers, their characterization, and in vitro/vivo evaluations. Additionally, this review highlights the challenges and opportunities in the field and suggests future directions for research. Nanocarrier-based delivery systems have shown great potential in improving the therapeutic efficacy of TCMs, and this review may serve as a comprehensive resource to researchers in this field.
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Affiliation(s)
- Chong Qiu
- State Key Laboratory for Quality Ensurance and Sustainable Use of Dao-Di Herbs, Artemisinin Research Center, and Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, China
| | - Jun Zhe Zhang
- State Key Laboratory for Quality Ensurance and Sustainable Use of Dao-Di Herbs, Artemisinin Research Center, and Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, China
| | - Bo Wu
- Department of Traditional Chinese Medical Science, Sixth Medical Center of the Chinese PLA General Hospital, Beijing, 100037, China
| | - Cheng Chao Xu
- State Key Laboratory for Quality Ensurance and Sustainable Use of Dao-Di Herbs, Artemisinin Research Center, and Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, China
| | - Huan Huan Pang
- State Key Laboratory for Quality Ensurance and Sustainable Use of Dao-Di Herbs, Artemisinin Research Center, and Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, China
| | - Qing Chao Tu
- State Key Laboratory for Quality Ensurance and Sustainable Use of Dao-Di Herbs, Artemisinin Research Center, and Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, China
| | - Yu Qian Lu
- State Key Laboratory for Quality Ensurance and Sustainable Use of Dao-Di Herbs, Artemisinin Research Center, and Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, China
| | - Qiu Yan Guo
- State Key Laboratory for Quality Ensurance and Sustainable Use of Dao-Di Herbs, Artemisinin Research Center, and Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, China.
| | - Fei Xia
- State Key Laboratory for Quality Ensurance and Sustainable Use of Dao-Di Herbs, Artemisinin Research Center, and Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, China.
| | - Ji Gang Wang
- State Key Laboratory for Quality Ensurance and Sustainable Use of Dao-Di Herbs, Artemisinin Research Center, and Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, China.
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 117600, Singapore.
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Girardi F, Matz M, Stiller C, You H, Marcos Gragera R, Valkov MY, Bulliard JL, De P, Morrison D, Wanner M, O'Brian DK, Saint-Jacques N, Coleman MP, Allemani C, Hamdi-Chérif M, Kara L, Meguenni K, Regagba D, Bayo S, Cheick Bougadari T, Manraj SS, Bendahhou K, Ladipo A, Ogunbiyi OJ, Somdyala NIM, Chaplin MA, Moreno F, Calabrano GH, Espinola SB, Carballo Quintero B, Fita R, Laspada WD, Ibañez SG, Lima CA, Da Costa AM, De Souza PCF, Chaves J, Laporte CA, Curado MP, de Oliveira JC, Veneziano CLA, Veneziano DB, Almeida ABM, Latorre MRDO, Rebelo MS, Santos MO, Azevedo e Silva G, Galaz JC, Aparicio Aravena M, Sanhueza Monsalve J, Herrmann DA, Vargas S, Herrera VM, Uribe CJ, Bravo LE, Garcia LS, Arias-Ortiz NE, Morantes D, Jurado DM, Yépez Chamorro MC, Delgado S, Ramirez M, Galán Alvarez YH, Torres P, Martínez-Reyes F, Jaramillo L, Quinto R, Castillo J, Mendoza M, Cueva P, Yépez JG, Bhakkan B, Deloumeaux J, Joachim C, Macni J, Carrillo R, Shalkow Klincovstein J, Rivera Gomez R, Perez P, Poquioma E, Tortolero-Luna G, Zavala D, Alonso R, Barrios E, Eckstrand A, Nikiforuk C, Woods RR, Noonan G, Turner D, Kumar E, Zhang B, Dowden JJ, Doyle GP, Saint-Jacques N, Walsh G, Anam A, De P, McClure CA, Vriends KA, Bertrand C, Ramanakumar AV, Davis L, Kozie S, Freeman T, George JT, Avila RM, O’Brien DK, Holt A, Almon L, Kwong S, Morris C, Rycroft R, Mueller L, Phillips CE, Brown H, Cromartie B, Ruterbusch J, Schwartz AG, Levin GM, Wohler B, Bayakly R, Ward KC, Gomez SL, McKinley M, Cress R, Davis J, Hernandez B, Johnson CJ, Morawski BM, Ruppert LP, Bentler S, Charlton ME, Huang B, Tucker TC, Deapen D, Liu L, Hsieh MC, Wu XC, Schwenn M, Stern K, Gershman ST, Knowlton RC, Alverson G, Weaver T, Desai J, Rogers DB, Jackson-Thompson J, Lemons D, Zimmerman HJ, Hood M, Roberts-Johnson J, Hammond W, Rees JR, Pawlish KS, Stroup A, Key C, Wiggins C, Kahn AR, Schymura MJ, Radhakrishnan S, Rao C, Giljahn LK, Slocumb RM, Dabbs C, Espinoza RE, Aird KG, Beran T, Rubertone JJ, Slack SJ, Oh J, Janes TA, Schwartz SM, Chiodini SC, Hurley DM, Whiteside MA, Rai S, Williams MA, Herget K, Sweeney C, Kachajian J, Keitheri Cheteri MB, Migliore Santiago P, Blankenship SE, Conaway JL, Borchers R, Malicki R, Espinoza J, Grandpre J, Weir HK, Wilson R, Edwards BK, Mariotto A, Rodriguez-Galindo C, Wang N, Yang L, Chen JS, Zhou Y, He YT, Song GH, Gu XP, Mei D, Mu HJ, Ge HM, Wu TH, Li YY, Zhao DL, Jin F, Zhang JH, Zhu FD, Junhua Q, Yang YL, Jiang CX, Biao W, Wang J, Li QL, Yi H, Zhou X, Dong J, Li W, Fu FX, Liu SZ, Chen JG, Zhu J, Li YH, Lu YQ, Fan M, Huang SQ, Guo GP, Zhaolai H, Wei K, Chen WQ, Wei W, Zeng H, Demetriou AV, Mang WK, Ngan KC, Kataki AC, Krishnatreya M, Jayalekshmi PA, Sebastian P, George PS, Mathew A, Nandakumar A, Malekzadeh R, Roshandel G, Keinan-Boker L, Silverman BG, Ito H, Koyanagi Y, Sato M, Tobori F, Nakata I, Teramoto N, Hattori M, Kaizaki Y, Moki F, Sugiyama H, Utada M, Nishimura M, Yoshida K, Kurosawa K, Nemoto Y, Narimatsu H, Sakaguchi M, Kanemura S, Naito M, Narisawa R, Miyashiro I, Nakata K, Mori D, Yoshitake M, Oki I, Fukushima N, Shibata A, Iwasa K, Ono C, Matsuda T, Nimri O, Jung KW, Won YJ, Alawadhi E, Elbasmi A, Ab Manan A, Adam F, Nansalmaa E, Tudev U, Ochir C, Al Khater AM, El Mistiri MM, Lim GH, Teo YY, Chiang CJ, Lee WC, Buasom R, Sangrajrang S, Suwanrungruang K, Vatanasapt P, Daoprasert K, Pongnikorn D, Leklob A, Sangkitipaiboon S, Geater SL, Sriplung H, Ceylan O, Kög I, Dirican O, Köse T, Gurbuz T, Karaşahin FE, Turhan D, Aktaş U, Halat Y, Eser S, Yakut CI, Altinisik M, Cavusoglu Y, Türkköylü A, Üçüncü N, Hackl M, Zborovskaya AA, Aleinikova OV, Henau K, Van Eycken L, Atanasov TY, Valerianova Z, Šekerija M, Dušek L, Zvolský M, Steinrud Mørch L, Storm H, Wessel Skovlund C, Innos K, Mägi M, Malila N, Seppä K, Jégu J, Velten M, Cornet E, Troussard X, Bouvier AM, Guizard AV, Bouvier V, Launoy G, Dabakuyo Yonli S, Poillot ML, Maynadié M, Mounier M, Vaconnet L, Woronoff AS, Daoulas M, Robaszkiewicz M, Clavel J, Poulalhon C, Desandes E, Lacour B, Baldi I, Amadeo B, Coureau G, Monnereau A, Orazio S, Audoin M, D’Almeida TC, Boyer S, Hammas K, Trétarre B, Colonna M, Delafosse P, Plouvier S, Cowppli-Bony A, Molinié F, Bara S, Ganry O, Lapôtre-Ledoux B, Daubisse-Marliac L, Bossard N, Uhry Z, Estève J, Stabenow R, Wilsdorf-Köhler H, Eberle A, Luttmann S, Löhden I, Nennecke AL, Kieschke J, Sirri E, Justenhoven C, Reinwald F, Holleczek B, Eisemann N, Katalinic A, Asquez RA, Kumar V, Petridou E, Ólafsdóttir EJ, Tryggvadóttir L, Murray DE, Walsh PM, Sundseth H, Harney M, Mazzoleni G, Vittadello F, Coviello E, Cuccaro F, Galasso R, Sampietro G, Giacomin A, Magoni M, Ardizzone A, D’Argenzio A, Di Prima AA, Ippolito A, Lavecchia AM, Sutera Sardo A, Gola G, Ballotari P, Giacomazzi E, Ferretti S, Dal Maso L, Serraino D, Celesia MV, Filiberti RA, Pannozzo F, Melcarne A, Quarta F, Andreano A, Russo AG, Carrozzi G, Cirilli C, Cavalieri d’Oro L, Rognoni M, Fusco M, Vitale MF, Usala M, Cusimano R, Mazzucco W, Michiara M, Sgargi P, Boschetti L, Marguati S, Chiaranda G, Seghini P, Maule MM, Merletti F, Spata E, Tumino R, Mancuso P, Cassetti T, Sassatelli R, Falcini F, Giorgetti S, Caiazzo AL, Cavallo R, Piras D, Bella F, Madeddu A, Fanetti AC, Maspero S, Carone S, Mincuzzi A, Candela G, Scuderi T, Gentilini MA, Rizzello R, Rosso S, Caldarella A, Intrieri T, Bianconi F, Contiero P, Tagliabue G, Rugge M, Zorzi M, Beggiato S, Brustolin A, Gatta G, De Angelis R, Vicentini M, Zanetti R, Stracci F, Maurina A, Oniščuka M, Mousavi M, Steponaviciene L, Vincerževskienė I, Azzopardi MJ, Calleja N, Siesling S, Visser O, Johannesen TB, Larønningen S, Trojanowski M, Macek P, Mierzwa T, Rachtan J, Rosińska A, Kępska K, Kościańska B, Barna K, Sulkowska U, Gebauer T, Łapińska JB, Wójcik-Tomaszewska J, Motnyk M, Patro A, Gos A, Sikorska K, Bielska-Lasota M, Didkowska JA, Wojciechowska U, Forjaz de Lacerda G, Rego RA, Carrito B, Pais A, Bento MJ, Rodrigues J, Lourenço A, Mayer-da-Silva A, Coza D, Todescu AI, Valkov MY, Gusenkova L, Lazarevich O, Prudnikova O, Vjushkov DM, Egorova A, Orlov A, Pikalova LV, Zhuikova LD, Adamcik J, Safaei Diba C, Zadnik V, Žagar T, De-La-Cruz M, Lopez-de-Munain A, Aleman A, Rojas D, Chillarón RJ, Navarro AIM, Marcos-Gragera R, Puigdemont M, Rodríguez-Barranco M, Sánchez Perez MJ, Franch Sureda P, Ramos Montserrat M, Chirlaque López MD, Sánchez Gil A, Ardanaz E, Guevara M, Cañete-Nieto A, Peris-Bonet R, Carulla M, Galceran J, Almela F, Sabater C, Khan S, Pettersson D, Dickman P, Staehelin K, Struchen B, Egger Hayoz C, Rapiti E, Schaffar R, Went P, Mousavi SM, Bulliard JL, Maspoli-Conconi M, Kuehni CE, Redmond SM, Bordoni A, Ortelli L, Chiolero A, Konzelmann I, Rohrmann S, Wanner M, Broggio J, Rashbass J, Stiller C, Fitzpatrick D, Gavin A, Morrison DS, Thomson CS, Greene G, Huws DW, Grayson M, Rawcliffe H, Allemani C, Coleman MP, Di Carlo V, Girardi F, Matz M, Minicozzi P, Sanz N, Ssenyonga N, James D, Stephens R, Chalker E, Smith M, Gugusheff J, You H, Qin Li S, Dugdale S, Moore J, Philpot S, Pfeiffer R, Thomas H, Silva Ragaini B, Venn AJ, Evans SM, Te Marvelde L, Savietto V, Trevithick R, Aitken J, Currow D, Fowler C, Lewis C. Global survival trends for brain tumors, by histology: analysis of individual records for 556,237 adults diagnosed in 59 countries during 2000-2014 (CONCORD-3). Neuro Oncol 2023; 25:580-592. [PMID: 36355361 PMCID: PMC10013649 DOI: 10.1093/neuonc/noac217] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Survival is a key metric of the effectiveness of a health system in managing cancer. We set out to provide a comprehensive examination of worldwide variation and trends in survival from brain tumors in adults, by histology. METHODS We analyzed individual data for adults (15-99 years) diagnosed with a brain tumor (ICD-O-3 topography code C71) during 2000-2014, regardless of tumor behavior. Data underwent a 3-phase quality control as part of CONCORD-3. We estimated net survival for 11 histology groups, using the unbiased nonparametric Pohar Perme estimator. RESULTS The study included 556,237 adults. In 2010-2014, the global range in age-standardized 5-year net survival for the most common sub-types was broad: in the range 20%-38% for diffuse and anaplastic astrocytoma, from 4% to 17% for glioblastoma, and between 32% and 69% for oligodendroglioma. For patients with glioblastoma, the largest gains in survival occurred between 2000-2004 and 2005-2009. These improvements were more noticeable among adults diagnosed aged 40-70 years than among younger adults. CONCLUSIONS To the best of our knowledge, this study provides the largest account to date of global trends in population-based survival for brain tumors by histology in adults. We have highlighted remarkable gains in 5-year survival from glioblastoma since 2005, providing large-scale empirical evidence on the uptake of chemoradiation at population level. Worldwide, survival improvements have been extensive, but some countries still lag behind. Our findings may help clinicians involved in national and international tumor pathway boards to promote initiatives aimed at more extensive implementation of clinical guidelines.
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Affiliation(s)
- Fabio Girardi
- Cancer Survival Group, London School of Hygiene and Tropical Medicine, London, UK.,Cancer Division, University College London Hospitals NHS Foundation Trust, London, UK.,Division of Medical Oncology 2, Veneto Institute of Oncology IOV-IRCCS, Padua, Italy
| | - Melissa Matz
- Cancer Survival Group, London School of Hygiene and Tropical Medicine, London, UK
| | - Charles Stiller
- National Cancer Registration and Analysis Service, Public Health England, London, UK
| | - Hui You
- Cancer Information Analysis Unit, Cancer Institute NSW, St Leonards, New South Wales, Australia
| | - Rafael Marcos Gragera
- Epidemiology Unit and Girona Cancer Registry, Catalan Institute of Oncology, Girona, Spain
| | - Mikhail Y Valkov
- Department of Radiology, Radiotherapy and Oncology, Northern State Medical University, Arkhangelsk, Russia
| | - Jean-Luc Bulliard
- Centre for Primary Care and Public Health (Unisanté), University of Lausanne, Lausanne, Switzerland.,Neuchâtel and Jura Tumour Registry, Neuchâtel, Switzerland
| | - Prithwish De
- Surveillance and Cancer Registry, and Research Office, Clinical Institutes and Quality Programs, Ontario Health, Toronto, Ontario, Canada
| | - David Morrison
- Scottish Cancer Registry, Public Health Scotland, Edinburgh, UK
| | - Miriam Wanner
- Cancer Registry Zürich, Zug, Schaffhausen and Schwyz, University Hospital Zürich, Zürich, Switzerland
| | - David K O'Brian
- Alaska Cancer Registry, Alaska Department of Health and Social Services, Anchorage, Alaska, USA
| | - Nathalie Saint-Jacques
- Department of Medicine and Community Health and Epidemiology, Centre for Clinical Research, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Michel P Coleman
- Cancer Survival Group, London School of Hygiene and Tropical Medicine, London, UK.,Cancer Division, University College London Hospitals NHS Foundation Trust, London, UK
| | - Claudia Allemani
- Cancer Survival Group, London School of Hygiene and Tropical Medicine, London, UK
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Li L, Yan WQ, Ai Y, Mao YY, Lu YQ, Han YC, Wang HB, Fan ZM. [Diagnosis and treatment strategies of 56 cases of middle ear myoclonus]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2023; 58:15-20. [PMID: 36603861 DOI: 10.3760/cma.j.cn115330-20220401-00161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Objective: To analyze the clinical characteristics and treatment of middle ear myoclonus. Methods: Fifty-six cases of middle ear myoclonus were enrolled in Shandong Provincial ENT Hospital, Shandong University from September 2019 to August 2021, including 23 males and 33 females. The age ranged from 6 to 75 years, with a median age of 35 years; Forty-seven cases were unilateral tinnitus, nine cases were bilateral tinnitus. The time of tinnitus ranged from 20 days to 8 years. The voice characteristics, inducing factors, nature (frequency) of tinnitus, tympanic membrane conditions during tinnitus, audiological related tests, including long-term acoustic tympanogram, stapedius acoustic reflex, pure tone auditory threshold, short increment sensitivity test, alternate binaural loudness balance test, loudness discomfort threshold, vestibular function examination, facial electromyography, and imaging examination were recorded. Oral carbamazepine and/or surgical treatment were used. The patients were followed up for 6-24 months and the tinnitus changes were observed. Results: Tinnitus was diverse, including stepping on snow liking sound, rhythmic drumming, white noise, and so on. The inducing factors included external sound, body position change, touching the skin around the face and ears, speaking, chewing and blinking, etc. Forty-four cases were induced by single factor and 9 cases were induced by two or more factors. There was no definite inducing factor in 1 case. One patient had tinnitus with epilepsy. One case of traumatic facial paralysis after facial nerve decompression could induce tinnitus on the affected side when the auricle moved. Tympanic membrane flutter with the same frequency as tinnitus was found in 12 cases by otoscopy, and the waveform with the same frequency as tinnitus was found by long-term tympanogram examination. There were 7 patients with no tympanic membrane activity by otoscopy, the 7 cases also with the same frequency of tinnitus by long-term tympanogram examination, but the change rate of the waveform was faster than that of the patients with tympanic membrane flutter. All patients with tinnitus had no change in hearing. One case of tinnitus complicated with epilepsy (a 6-year-old child) was treated with antiepileptic drug (topiramate) and tinnitus subsided. One case suffered from tinnitus after facial nerve decompression for traumatic facial paralysis was not given special treatment. Fifty-four cases were treated with oral drug (carbamazepine), of which 10 cases were completely controlled and 23 cases were relieved; 21 cases were invalid. Among the 21 patients with no effect of carbamazepine treatment, 8 patients were treated by surgery, 7 patients had no tinnitus after surgery, 1 patient received three times of operation, and the third operation was followed up for 6 months, no tinnitus occurred again. The other 13 cases refused the surgical treatment due to personal reasons. Conclusions: Middle ear myoclonus tinnitus and the inducing factors manifestate diversity. Oral carbamazepine and other sedative drugs are effective for some patients, and surgical treatment is feasible for those who are ineffective for medication.
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Affiliation(s)
- L Li
- Department of Otology Surgery, Shandong Provincial ENT Hospital, Shandong University, Jinan 250021, China
| | - W Q Yan
- Department of Otology Surgery, Shandong Provincial ENT Hospital, Shandong University, Jinan 250021, China
| | - Y Ai
- Department of Otology Surgery, Shandong Provincial ENT Hospital, Shandong University, Jinan 250021, China
| | - Y Y Mao
- Department of Otology Surgery, Shandong Provincial ENT Hospital, Shandong University, Jinan 250021, China
| | - Y Q Lu
- Department of Otology Surgery, Shandong Provincial ENT Hospital, Shandong University, Jinan 250021, China
| | - Y C Han
- Department of Otology Surgery, Shandong Provincial ENT Hospital, Shandong University, Jinan 250021, China
| | - H B Wang
- Department of Otology Surgery, Shandong Provincial ENT Hospital, Shandong University, Jinan 250021, China
| | - Z M Fan
- Department of Otology Surgery, Shandong Provincial ENT Hospital, Shandong University, Jinan 250021, China
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Lu YQ, Han YC, Li L, Fan ZM, Wang HB. [Eustachian tube teratoma:a case report]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2022; 57:738-740. [PMID: 35725319 DOI: 10.3760/cma.j.cn115330-20220313-00112] [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: 06/15/2023]
Affiliation(s)
- Y Q Lu
- Department of Otorhinolaryngology-Head and Neck Surgery, Shandong Provincial ENT Hospital,Jinan 250000, China Cheeloo College of Medicine,Shandong University, Jinan 250100, China
| | - Y C Han
- Department of Otorhinolaryngology-Head and Neck Surgery, Shandong Provincial ENT Hospital,Jinan 250000, China Cheeloo College of Medicine,Shandong University, Jinan 250100, China
| | - L Li
- Department of Otorhinolaryngology-Head and Neck Surgery, Shandong Provincial ENT Hospital,Jinan 250000, China Cheeloo College of Medicine,Shandong University, Jinan 250100, China
| | - Z M Fan
- Department of Otorhinolaryngology-Head and Neck Surgery, Shandong Provincial ENT Hospital,Jinan 250000, China Cheeloo College of Medicine,Shandong University, Jinan 250100, China
| | - H B Wang
- Department of Otorhinolaryngology-Head and Neck Surgery, Shandong Provincial ENT Hospital,Jinan 250000, China Cheeloo College of Medicine,Shandong University, Jinan 250100, China
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Lou YX, Lu YQ, Mei ZY, Sun ML, Sun JK, Yu HY. [Comparative study on fracture toughness of digital light processing three-dimensional printing zirconia and milled zirconia]. Zhonghua Kou Qiang Yi Xue Za Zhi 2021; 56:639-645. [PMID: 34275218 DOI: 10.3760/cma.j.cn112144-20210330-00151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Objective: To investigate the influence of digital light processing (DLP) and computer numerical controlmilling (CNC) on the mechanical behavior of zirconia. Methods: Prepared DLP samples (experimental group, n=52) and CNC samples (control group, n=52) with 12 samples in each group were randomly selected using random number table to measure density, grain size and crystal phase composition. According to the different methods fracture toughness test, the samples were divided into indentation method group (IM) and single-edge-V-notch-beam group (SEVNB), with 30 DLP and 30 CNC samples in IM group, 10 DLP and 10 CNC samples in SEVNB group. The IM group was tested under three different loads (49.03 N, 98.07 N, 196.10 N), there were 10 samples for each load and each sample was tested at 15 points, and the load with the ratio of crack length to indentation diagonal length greater than 2.5 was selected as the indentation load to calculate its IM fracture toughness. At the same time, the SEVNB group was tested with four point bending test to record the maximum load at the time of fracture and calculate the SEVNB fracture toughness. Finally, the indentation and fracture surface were observed using optical microscope and scanning electron microscope, and the results of DLP group and CNC group were further compared to explore the difference in fracture mechanism. Results: The microstructure of DLP and CNC zirconia was basically the same, the density of DLP group was (6.020±0.021) g/cm3, the grain size was (0.603±0.033) μm; the density of CNC group was (6.038±0.012) g/cm3, the grain size was (0.591±0.033) μm. Both groups were composed of tetragonal zirconia. The load of 196.10 N was chosen as the indentation load for two groups to calculate the IM fracture toughness. In terms of fracture toughness, there was no significant difference between the two groups (P>0.05). Scanning electron microscope images of fracture surface showed the intergranular fracture was the leading fracture mode of two groups. The IM and SEVNB fracture toughness of DLP zirconia were (6.111±0.179) MPa·m1/2 and (7.221±0.809) MPa·m1/2, respectively. The IM and SEVNB fracture toughness of CNC zirconia were (6.126±0.383) MPa·m1/2 and (7.408±0.533) MPa·m1/2, respectively. Conclusions: The microstructure of DLP and CNC zirconia is almost the same, and there is little difference in the fracture toughness of zirconia between two processing technologies.
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Affiliation(s)
- Y X Lou
- Department of Prosthodontics Ⅱ, West China Hospital of Stomatology, Sichuan University & State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, Chengdu 610041, China
| | - Y Q Lu
- Department of Prosthodontics Ⅱ, West China Hospital of Stomatology, Sichuan University & State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, Chengdu 610041, China
| | - Z Y Mei
- Department of Prosthodontics Ⅱ, West China Hospital of Stomatology, Sichuan University & State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, Chengdu 610041, China
| | - M L Sun
- Department of Prosthodontics Ⅱ, West China Hospital of Stomatology, Sichuan University & State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, Chengdu 610041, China
| | - J K Sun
- Department of Prosthodontics Ⅱ, West China Hospital of Stomatology, Sichuan University & State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, Chengdu 610041, China
| | - H Y Yu
- Department of Prosthodontics Ⅱ, West China Hospital of Stomatology, Sichuan University & State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, Chengdu 610041, China
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Wu HF, Wang JP, Duan EG, Feng YF, Wan ZY, Wu YX, Lu YQ. Study on the preparation of granular alum sludge adsorbent for phosphorus removal. Water Sci Technol 2019; 79:2378-2386. [PMID: 31411592 DOI: 10.2166/wst.2019.241] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Alum sludge is the sludge discharged from a sedimentation tank in a drinking water treatment plant when polymerized with poly-aluminum chloride (PAC). In this paper, granular alum sludge adsorbent (GASA) was manufactured using powdery alum sludge (PAS) as the raw material and methods such as gluing and pore-forming. The effects of different binders, pore-forming agents, roasting temperatures, and roasting times on the formation of GASA and its dephosphorization performance were investigated. Results showed that the optimum binder was AlCl3 at a mass ratio of 8%, and the best pore-forming agent was starch at a 4% dosage ratio. Meanwhile, the optimum roasting temperature and time were 500 °C and 2 hours, respectively. The specific surface area of GASA was 23.124 m2/g. Scanning electron microscopy suggested that GASA's surface became rough, particles became tight, and average pore size increased, with additional pore channels. P adsorption by GASA reached 0.90 mg/g. The effluent phosphorus concentration of actual tail water decreased to 0.49 mg/L and the removal rate reached 73.5% when the GASA dosage was 20 g/L. The findings of this study are important for the further development of a low-cost adsorbent material for P removal in the future.
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Affiliation(s)
- H F Wu
- Department of Municipal Engineering, Nanjing Tech University, Nanjing, Jiangsu 211816, China E-mail:
| | - J P Wang
- Department of Municipal Engineering, Nanjing Tech University, Nanjing, Jiangsu 211816, China E-mail:
| | - E G Duan
- Department of Municipal Engineering, Nanjing Tech University, Nanjing, Jiangsu 211816, China E-mail:
| | - Y F Feng
- Department of Municipal Engineering, Nanjing Tech University, Nanjing, Jiangsu 211816, China E-mail:
| | - Z Y Wan
- Department of Municipal Engineering, Nanjing Tech University, Nanjing, Jiangsu 211816, China E-mail:
| | - Y X Wu
- Department of Municipal Engineering, Nanjing Tech University, Nanjing, Jiangsu 211816, China E-mail:
| | - Y Q Lu
- Department of Municipal Engineering, Nanjing Tech University, Nanjing, Jiangsu 211816, China E-mail:
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Wu HF, Yue LZ, Jiang SL, Lu YQ, Wu YX, Wan ZY. Biodegradation of polyvinyl alcohol by different dominant degrading bacterial strains in a baffled anaerobic bioreactor. Water Sci Technol 2019; 79:2005-2012. [PMID: 31294717 DOI: 10.2166/wst.2019.202] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Polyvinyl alcohol (PVA) is the main pollutant in printing and dyeing wastewaters. This pollutant exhibits great demand, poor biodegradability and refractory degradation. In this study, PVA wastewater treatment experiments were conducted in a stably operating baffled anaerobic bioreactor (ABR) by using simulated PVA wastewater. The PVA degradation pathway and mechanism of the mixed dominant PVA-degrading bacterial strains were identified through the analysis of their degradation products. From the results, we inferred that PVA was degraded in a stepwise process under the synergistic action of different extracellular and intracellular enzymes produced by the mixed dominant PVA-degrading bacterial strains. In this process, PVA was first degraded into ketones, fatty acids and alcohols. It was then regenerated into acetic acid, hydrogen and carbon dioxide. Finally, these substances could be further utilized by methanogens. PVA was thus degraded completely. This study may serve as a reference for future works on the degradation of PVA in the ecological environment. It may also guide the sustainable development of PVA.
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Affiliation(s)
- H F Wu
- Department of Municipal Engineering, College of Urban Construction, Nanjing Tech University, Nanjing 211816, China E-mail:
| | - L Z Yue
- Department of Municipal Engineering, College of Urban Construction, Nanjing Tech University, Nanjing 211816, China E-mail:
| | - S L Jiang
- Department of Municipal Engineering, College of Urban Construction, Nanjing Tech University, Nanjing 211816, China E-mail:
| | - Y Q Lu
- Department of Municipal Engineering, College of Urban Construction, Nanjing Tech University, Nanjing 211816, China E-mail:
| | - Y X Wu
- Department of Municipal Engineering, College of Urban Construction, Nanjing Tech University, Nanjing 211816, China E-mail:
| | - Z Y Wan
- Department of Municipal Engineering, College of Urban Construction, Nanjing Tech University, Nanjing 211816, China E-mail:
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Zhang JC, Wu FX, Meng LL, Zeng CY, Lu YQ. [A study on the effects and safety of sequential humidified high flow nasal cannula oxygenation therapy on the COPD patients after extubation]. Zhonghua Yi Xue Za Zhi 2018; 98:109-112. [PMID: 29343034 DOI: 10.3760/cma.j.issn.0376-2491.2018.02.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate and compare the effect and safety of nasal high-flow oxygen therapy (HFNCO) and noninvasive ventilation (NIV) therapy after extubation in patients with chronic obstructive pulmonary disease (COPD). Methods: All COPD patients subjected to mechanical ventilation in the Emergency Intensive Unit of the First Affiliated Hospital of Zhejiang University during January 2015 to June 2016 were included in the study. The patients were divided into two groups after extubation and HFNCO and NIV were adopted on each group respectively. Clinical indexes including the patients' general condition, blood gas analysis and pulmonary function before and after extubation, ratio of re-intubation and CT grades were collected and analyzed. Results: There was no significant difference in the incidence of aspiration (4.8% vs 8.3%), pressure sores (0 vs 8.3%) and delirium (4.8% vs 12.5%) between the two groups (all P>0.05). At 12 h after extubation, the oxygenation index of NIV group was significantly higher than that of the HFNCO group (265±29 vs 297±33; P<0.05), while no significant difference in PCO(2) (P>0.05). For 24 h and 72 h after extubation, there was no statistically significant difference in oxygenation index and PCO(2) between the both groups (P>0.05). The intensive care unit (ICU) retention time in HFNCO group was significantly lower than that in NIV group (13.7±0.8 vs 15.2±0.5; P<0.05). In addition, no significant difference between the two groups in mortality and re-intubation rate at 28 d (P>0.05) was observed. Conclusion: HFNCO is effective and safe in the treatment of COPD patients after extubation, and it is hence valuable for further clinical application.
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Affiliation(s)
- J C Zhang
- Emergency Center, First Affiliated Hospital of Zhejiang University, Hangzhou 321000, China
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Zhao LN, Hu YJ, Liu WY, Su YX, Chen KJ, Lu YQ. [Multiple facial deformities on accessory maxilla]. Zhonghua Kou Qiang Yi Xue Za Zhi 2018; 53:701-702. [PMID: 30392228 DOI: 10.3760/cma.j.issn.1002-0098.2018.10.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- L N Zhao
- Department of Oral and Maxillofacial Surgery, Xiangya Stomatology Hospital, Central South University, Changsha 410000, China
| | - Y J Hu
- Department of Oral and Maxillofacial Surgery, Xiangya Stomatology Hospital, Central South University, Changsha 410000, China
| | - W Y Liu
- Department of Oral and Maxillofacial Surgery, Xiangya Stomatology Hospital, Central South University, Changsha 410000, China
| | - Y X Su
- Department of Oral and Maxillofacial Surgery, Xiangya Stomatology Hospital, Central South University, Changsha 410000, China
| | - K J Chen
- Department of Oral and Maxillofacial Radiology, Xiangya Stomatology Hospital, Central South University, Changsha 410000, China
| | - Y Q Lu
- Department of Orthodontics, Xiangya Stomatology Hospital, Central South University, Changsha 410000, China
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Wei D, Guo J, Fang X, Wei D, Ni R, Chen P, Hu X, Zhang Y, Hu W, Lu YQ, Zhu SN, Xiao M. Multiple generations of high-order orbital angular momentum modes through cascaded third-harmonic generation in a 2D nonlinear photonic crystal. Opt Express 2017; 25:11556-11563. [PMID: 28788719 DOI: 10.1364/oe.25.011556] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We experimentally demonstrate multiple generations of high-order orbital angular momentum (OAM) modes through third-harmonic generation in a 2D nonlinear photonic crystal. Such third-harmonic generation process is achieved by cascading second-harmonic generation and sum-frequency generation using the non-collinear quasi-phase-matching technique. This technique allows multiple OAM modes with different colors to be simultaneously generated. Moreover, the OAM conservation law guarantees that the topological charge is tripled in the cascaded third-harmonic generation process. Our method is effective for obtaining multiple high-order OAM modes for optical imaging, manipulation, and communications.
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11
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Hu CH, Zhuang XJ, Wei YM, Zhang M, Lu SS, Lu YQ, Yang XG, Lu KH. Comparison of Mitochondrial Function in Boar and Bull Spermatozoa Throughout Cryopreservation Based on JC-1 Staining. Cryo Letters 2017; 38:75-79. [PMID: 28376143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
BACKGROUND Poor reproductivity hampers the commercialization of cryopreserved boar semen. OBJECTIVE This study was to determine the differences in the sperm mitochondrial function between boar and bull semen at different cryopreservation stages. MATERIALS AND METHODS Boar and bull fresh, equilibrated, and frozen-thawed spermatozoa were evaluated for mitochondrial function using JC-1 under a fluorescent microscope. RESULTS Bull and boar percentage of spermatozoa staining green (PSSG) showed no difference between fresh and equilibrated semen (P> 0.05). However, frozen-thawed bull and boar semen demonstrated significantly higher PSSG (P < 0.01) than fresh and equilibrated semen. Frozen-thawed boar semen represented a significantly higher PSSG (P < 0.01) than bull semen. CONCLUSION Negative cryopreservation influence on boar and bull spermatozoa was not significantly produced by pre-freezing procedures, but rather by freezing and thawing. Cryopreservation has more pronounced negative effects on boar than on bull spermatozoa, which partly explains lagged commercialization of frozen boar semen.
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Affiliation(s)
- C H Hu
- College of Animal Science and Technology, Guangxi University, Nanning, China
| | - X J Zhuang
- College of Animal Science and Technology, Guangxi University, Nanning, China
| | - Y M Wei
- College of Animal Science and Technology, Guangxi University, Nanning, China
| | - M Zhang
- College of Animal Science and Technology, Guangxi University, Nanning, China
| | - S S Lu
- College of Animal Science and Technology, Guangxi University, Nanning, China
| | - Y Q Lu
- College of Animal Science and Technology, Guangxi University, Nanning, China
| | - X G Yang
- College of Animal Science and Technology, Guangxi University, Nanning, China
| | - K H Lu
- College of Animal Science and Technology, Guangxi University, Nanning, China.
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Ma Y, Wei BY, Shi LY, Srivastava AK, Chigrinov VG, Kwok HS, Hu W, Lu YQ. Fork gratings based on ferroelectric liquid crystals. Opt Express 2016; 24:5822-5828. [PMID: 27136779 DOI: 10.1364/oe.24.005822] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
In this article, we disclose a fork grating (FG) based on the photo-aligned ferroelectric liquid crystal (FLC). The Digital Micro-mirror Device based system is used as a dynamic photomask to generated different holograms. Because of controlled anchoring energy, the photo alignment process offers optimal conditions for the multi-domain FLC alignment. Two different electro-optical modes namely DIFF/TRANS and DIFF/OFF switchable modes have been proposed where the diffraction can be switched either to no diffraction or to a completely black state, respectively. The FLC FG shows high diffraction efficiency and fast response time of 50µs that is relatively faster than existing technologies. Thus, the FLC FG may pave a good foundation toward optical vertices generation and manipulation that could find applications in a variety of devices.
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Fang X, Yang G, Wei D, Wei D, Ni R, Ji W, Zhang Y, Hu X, Hu W, Lu YQ, Zhu SN, Xiao M. Coupled orbital angular momentum conversions in a quasi-periodically poled LiTaO₃ crystal. Opt Lett 2016; 41:1169-1172. [PMID: 26977661 DOI: 10.1364/ol.41.001169] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We experimentally demonstrate the orbital angular momentum (OAM) conversion by the coupled nonlinear optical processes in a quasi-periodically poled LiTaO3 crystal. In such a crystal, third-harmonic generation (THG) is realized by the coupled second-harmonic generation (SHG) and sum-frequency generation (SFG) processes, i.e., SHG is dependent on SFG and vice versa. The OAMs of the interacting waves are proved to be conserved in such coupled nonlinear optical processes. As we increase the input OAM in the experiment, the conversion efficiency decreases because of the reduced fundamental power density. Our results provide better understanding for the OAM conversions, which can be used to efficiently produce an optical OAM state at a short wavelength.
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Yi Q, Cao Y, Liu OS, Lu YQ, Wang JS, Wang SL, Yao R, Fan ZP. Spatial and temporal expression of histone demethylase, Kdm2a, during murine molar development. Biotech Histochem 2015; 91:137-44. [PMID: 26720400 DOI: 10.3109/10520295.2015.1106586] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
The histone demethylase, lysine (K)-specific demethylase 2A (Kdm2a), is highly conserved and expressed ubiquitously. Kdm2a can regulate cell proliferation and osteo/dentinogenic, adipogenic and chondrogenic differentiation of mesenchymal stem cells (MSCs) derived from dental tissue. We used quantitative real-time RT-PCR analysis and immunohistochemistry to detect Kdm2a expression during development of the murine molar at embryonic days E12, E14, E16 and E17 and postnatal days P3 and P14. Immunohistochemistry results showed no positive staining of Kdm2a at E12. At E14, Kdm2a was expressed weakly in the inner enamel epithelium, stellate reticulum cells and dental sac. At E16, Kdm2a was expressed mainly in the inner and outer enamel epithelium, stratum intermedium and dental sac, but weaker staining was found in cervical loop and dental papilla cells adjacent to the basement membrane. At E17, the strongest Kdm2a staining was detected in the ameloblasts and stronger Kdm2a staining also was detected in the stratum intermedium, outer enamel epithelium and dental papilla cells compared to the expression at E16. Postnatally, we found that Kdm2a was localized in secretory and mature ameloblasts and odontoblasts, and dentin was unstained. Real-time RT-PCR showed that Kdm2a mRNA levels in murine germ cells increased from E12 to E14 and from E14 to E16; no significant change occurred at E16, E17 or P3, then the levels decreased at P14 compared to P3. Kdm2a expression may be closely related to cell proliferation, to ameloblast and odontoblast differentiation and to the secretion of extracellular enamel and dentin during murine tooth development.
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Affiliation(s)
- Q Yi
- a Laboratory of Molecular Signaling and Stem Cells Therapy, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, Capital Medical University School of Stomatology , Beijing , China.,d Xiangya Stomatology Hospital, Central South University , Changsha, Hunan , China.,e School of Stomatology, Central South University , Changsha, Hunan , China
| | - Y Cao
- a Laboratory of Molecular Signaling and Stem Cells Therapy, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, Capital Medical University School of Stomatology , Beijing , China.,f Department of General Dentistry , Capital Medical University School of Stomatology , Beijing , China
| | - O S Liu
- d Xiangya Stomatology Hospital, Central South University , Changsha, Hunan , China.,e School of Stomatology, Central South University , Changsha, Hunan , China
| | - Y Q Lu
- d Xiangya Stomatology Hospital, Central South University , Changsha, Hunan , China.,e School of Stomatology, Central South University , Changsha, Hunan , China
| | - J S Wang
- b Molecular Laboratory for Gene Therapy and Tooth Regeneration, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, Capital Medical University School of Stomatology , Beijing , China.,c Department of Biochemistry and Molecular Biology , Capital Medical University School of Basic Medical Sciences , Beijing , China
| | - S L Wang
- b Molecular Laboratory for Gene Therapy and Tooth Regeneration, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, Capital Medical University School of Stomatology , Beijing , China.,c Department of Biochemistry and Molecular Biology , Capital Medical University School of Basic Medical Sciences , Beijing , China
| | - R Yao
- g Department of Pediatrics , Stomatological Hospital of Nankai University , Tianjin , China
| | - Z P Fan
- a Laboratory of Molecular Signaling and Stem Cells Therapy, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, Capital Medical University School of Stomatology , Beijing , China
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Hu LL, Lu YQ, Xu HY, Yang XG, Lu SS, Lu KH. Production of hGFAP-DsRed transgenic Guangxi Bama mini-pigs via somatic cell nuclear transfer. Genet Mol Res 2015; 14:16285-96. [PMID: 26662422 DOI: 10.4238/2015.december.8.19] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The mini-pig is a useful animal model for human biomedical research due to its physiological similarity to humans and the ease of handling. In order to optimize the efficiency of production of transgenic Bama mini-pigs through somatic cell nuclear transfer (SCNT), we examined the effects of contact inhibition, roscovitine treatment, and serum starvation on the cell cycle synchronization and transgenic cloned embryo development in vivo and in vitro after nuclear transfer. The analysis showed that the rates of G0/G1 stage cells in the contact inhibition (92.11%) and roscovitine treatment groups (89.59%) were significantly higher than in serum starvation group (80.82%). A higher rate of apoptosis was seen in the serum starvation group (14.13%) compared to the contact inhibition and roscovitine treatment groups (6.71 and 2.46% respectively, P < 0.05). There was a significant decrease in blastocyst yield in the serum starvation group (14.19%) compared to the roscovitine treatment and contact inhibition groups (21.31 and 20.32% respectively, P < 0.05). A total of 1070 transgenic cloned embryos derived from the three treatment groups were transferred to surrogate sows; one pregnancy was established and three embryos from the roscovitine treatment group successfully completed gestation. These results indicate that the roscovitine treatment was more effective at synchronizing transgenic kidney cells in Bama mini-pigs and allowed reconstructed embryos to develop to full term.
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Affiliation(s)
- L L Hu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, and College of Animal Science and Technology, Guangxi High Education Laboratory for Animal Reproduction and Biotechnology, Guangxi University, Nanning, China
| | - Y Q Lu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, and College of Animal Science and Technology, Guangxi High Education Laboratory for Animal Reproduction and Biotechnology, Guangxi University, Nanning, China
| | - H Y Xu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, and College of Animal Science and Technology, Guangxi High Education Laboratory for Animal Reproduction and Biotechnology, Guangxi University, Nanning, China
| | - X G Yang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, and College of Animal Science and Technology, Guangxi High Education Laboratory for Animal Reproduction and Biotechnology, Guangxi University, Nanning, China
| | - S S Lu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, and College of Animal Science and Technology, Guangxi High Education Laboratory for Animal Reproduction and Biotechnology, Guangxi University, Nanning, China
| | - K H Lu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, and College of Animal Science and Technology, Guangxi High Education Laboratory for Animal Reproduction and Biotechnology, Guangxi University, Nanning, China
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Srivastava AK, Wang X, Gong SQ, Shen D, Lu YQ, Chigrinov VG, Kwok HS. Micro-patterned photo-aligned ferroelectric liquid crystal Fresnel zone lens. Opt Lett 2015; 40:1643-1646. [PMID: 25872037 DOI: 10.1364/ol.40.001643] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
In this Letter, we disclose a fast switchable Fresnel zone lens (FZL) by confining the ferroelectric liquid crystals (FLCs) in multiple microscopically defined photo-aligned alignment domains. The photo-alignment (PA) offers good control on the anchoring energy (W) by mean of irradiation doses (ID) and thus excellent alignment for FLCs. Two operational modes of the FLCFZL, i.e., FOCUS/OFF and FOCUS/DEFOCUS, were demonstrated. The proposed diffracting element provides fast response time, high diffraction efficiency (η), with saturated electro-optical (EO) operations up to high frequency (≈2 kHz). Thus, the proposed FLCFZLs with simple fabrication open several opportunities to improve the quality of existing devices and to find new applications.
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Li XX, Yang XG, Lu YQ, Lu SS, Zhang M, Yao HI, Meng LJ, Lu KH. Protective effects of melatonin against oxidative stress in flow cytometry-sorted buffalo sperm. Reprod Domest Anim 2011; 47:299-307. [PMID: 21790800 DOI: 10.1111/j.1439-0531.2011.01858.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Previous reports of the ability of melatonin to scavenge a variety of toxic oxygen and nitrogen-based reactants suggest that melatonin could be an effective antioxidant for protecting sperm. In this study, flow cytometry and laser tweezers Raman spectroscopy were used to evaluate the effect of melatonin on buffalo sperm quality to optimize sperm sex-sorting procedures. In fresh sperm incubated in the presence or absence of melatonin (10(-4) m) for 1, 24, 48 h or 72 h at 27°C, the mitochondrial activity was significantly higher than in a non-melatonin control (p < 0.05). Also, during the flow-sorting process, sperm in melatonin-supplemented groups had higher (p < 0.05) mitochondrial activity than the control. The intensity of Raman spectra from sperm frozen in media supplemented with melatonin was significantly weaker than that for non-melatonin-treated groups, except for a band at 1302 per cm. Thus, melatonin helps to protect buffalo sperm from reactive oxygen species induced by staining, sorting and freezing and increases semen quality after the freezing-thawing processes. Furthermore, the results indicate the high potential of the laser tweezers Raman spectroscopy technique for rapid, effective and non-invasive assessment of the quality of sperm cells.
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Affiliation(s)
- X X Li
- Animal Reproduction Institute, Guangxi University, Nanning, China
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Sun YJ, Xing W, Li JP, Lu YQ, Zuo JE. Microbial community in granules from a high-rate EGSB reactor. Prikl Biokhim Mikrobiol 2009; 45:659-663. [PMID: 20067149] [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: 05/28/2023]
Abstract
The spatial distribution, quantity and diversity of different microorganisms within anaerobic granular sludge from a lab-scale expanded granular sludge bed (EGSB) reactor operated at different organic loading rates were studied using florescent in situ hybridization (FISH), real time quantitative-polymerase chain reaction (RTQ-PCR) and denaturing gradient gel electrophoresis (DGGE) techniques. The results indicated that most Eubacteria were located in the outer layer of granule, while the Archaea which mainly were methanogens and more sensible to the environmental conditions were located in the inner layer of the granule. The quantity of Archaea was obviously less than that of Eubacteria in the granules, but increased with the increasing of organic loading rates of the reactor. As the organic loading rate of the reactor increased and the operating time elapsed, the Archaea community in the granules changed significantly. Seven typical DGGE bands were collected and sequenced, and found that the dominant species of Archaea in the granules operated in the last period were mainly Methanocorpusculum, Methanobacterium, Methanosaeta.
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Affiliation(s)
- Y J Sun
- Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China.
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Qiu HB, Lu SS, Ji KL, Song XM, Lu YQ, Zhang M, Lu KH. Membrane progestin receptor beta (mPR-beta): a protein related to cumulus expansion that is involved in in vitro maturation of pig cumulus-oocyte complexes. Steroids 2008; 73:1416-23. [PMID: 18722396 DOI: 10.1016/j.steroids.2008.07.007] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2008] [Revised: 07/11/2008] [Accepted: 07/11/2008] [Indexed: 01/04/2023]
Abstract
A new group of putative membrane receptors have now been isolated from fish and other vertebrates, including human. These proteins are classified into three groups known as membrane progestin receptor alpha, beta and gamma (mPR-alpha, -beta and -gamma). In the present study we have investigated the role of mPR-beta in regulating in vitro maturation (IVM) of pig cumulus-oocyte complexes (COCs). RT-PCR and Western blot analysis indicated that COCs contain transcripts and proteins for mPR-beta. The levels of both transcripts and proteins increased between 0 and 20h IVM, but then decreased between 20 and 44h. The luteinizing hormone (LH) and follicle-stimulating hormone (FSH) did not affect mPR-beta expression during IVM. Immunofluorescence analysis indicated that the mPR-beta was localized in the plasma membrane of cumulus cell. However, in mouse embryonic fibroblasts (MEFs), mPR-beta was detected at the endoplasmic reticulum (ER) rather than the plasma membrane. Cumulus expansion was impaired significantly (P<0.05) when COCs were incubated in maturation medium containing 10% (v/v) anti-mPR-beta serum during IVM. Bioinformatics analysis predicted that mPR-beta had an ER retention motif and an endocytosis internalization motif. These results suggest that the mPR-beta is a molecule related to cumulus expansion and it might function by regulation of exocytosis. In conclusion, this is the first description of the expression patterns and subcellular localization of mPR-beta in COCs and might shed light on the function of the protein.
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Affiliation(s)
- H B Qiu
- Animal Reproduction Institute, Guangxi Key Laboratory of Subtropical Bioresource Conservation and Utilization, Guangxi University, No. 100, Daxue Road, Nanning 530004, China
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Abstract
BACKGROUND Traumatic brain injury (TBI) is a common disease accompanied by chronic morbidity and mortality. The pathological mechanism and effective pharmacological treatments of TBI remain undetermined. It is suggested that AVP is involved in TBI. It is thus interesting to investigate the changes and effects of plasma AVP in clinical trials. METHODS The serum concentrations of AVP, serum electrolytes, and serum osmolarity in a total of 23 TBI patients were dynamically monitored (on admission, Day 1, Day 3, and Day 5). Relationship between AVP and severity of brain injury and functional outcome were evaluated, respectively. RESULTS The mean AVP serum concentrations in the TBI group were significantly higher than those recorded in the control (CTRL) group on intensive care unit (ICU) admission and Day 1 (p<0.05). On Day 3 and Day 5, the differences between those groups were not significant (p>0.05). The negative correlations were found between sodium and AVP (r=-0.35; p<0.05) and between osmolarity and AVP (r=-0.42; p<0.05). In poor outcome group, the mean AVP serum concentrations were significantly higher than in good outcome group and CTRL group (p<0.05). A statistically significant correlation was also found between AVP on ICU admission and the initial Glasgow Coma Scale (r=0.47; p<0.05). CONCLUSION We suggest that AVP is involved in the pathophysiology process of secondary brain damage after TBI. It seems that AVP antagonist is a promising target for the treatment of TBI, while further studies should be carried out.
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Affiliation(s)
- W D Huang
- Department of Emergency, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
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Fu Q, Zhang M, Qin WS, Lu YQ, Zheng HY, Meng B, Lu SS, Lu KH. Cloning the swamp buffalo SRY gene for embryo sexing with multiplex-nested PCR. Theriogenology 2007; 68:1211-8. [PMID: 17928043 DOI: 10.1016/j.theriogenology.2007.07.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2007] [Revised: 06/21/2007] [Accepted: 04/15/2007] [Indexed: 11/18/2022]
Abstract
The polymerase chain reaction (PCR) is an efficient method for sexing embryos. The objective of this study was to develop an accurate and reliable method for sexing swamp buffalo (Bubalus bubalis) embryos. The SRY gene from swamp buffalo genomic DNA was amplified by PCR, using primers based on the sequence of the Holstein SRY gene. This fragment was sequenced based on a BLAST search; the SRY gene was highly conserved. Using a Southern blot, there was a strong signal in genomic DNA only from male swamp buffalo. Two pairs of nested primers, targeted to amplify the swamp buffalo SRY conserved region, were designed for sex identification. Simultaneously, the G3PDH gene was co-amplified to serve as an internal control. A multiplex-nested PCR system was optimized by varying the following individually: concentrations of Mg(2+) and dNTPs, ratio of concentrations of primers and numbers of cycles. Biopsies of 27 IVF-derived embryos and 24 embryos fertilized with Y-chromosome-bearing sperm were examined. Using optimized procedures, clear signals following PCR amplification were obtained from all embryo samples; PCR amplification accuracy was further verified by comparing PCR and dot blots. We concluded that this PCR technique was highly reliable for sexing swamp buffalo embryos.
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Affiliation(s)
- Q Fu
- Animal Reproduction Institute, Guangxi Key Laboratory for Subtropical Bio-Resource Conservation and Utilization, Guangxi University, Nanning, Guangxi 530005, China
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Lu YQ, Liang XW, Zhang M, Wang WL, Kitiyanant Y, Lu SS, Meng B, Lu KH. Birth of twins after in vitro fertilization with flow-cytometric sorted buffalo (Bubalus bubalis) sperm. Anim Reprod Sci 2007; 100:192-6. [PMID: 17074453 DOI: 10.1016/j.anireprosci.2006.09.019] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2006] [Revised: 08/22/2006] [Accepted: 09/05/2006] [Indexed: 11/27/2022]
Abstract
Flow-cytometric sorting of mammalian sperm for production of offspring with the desired sex is one of the most important new biotechnologies available for livestock industry. The objectives of this study were: (i) to sort the sperm into X- and Y-enriched populations and (ii) use the sorted sperm for in vitro fertilization (IVF) to produce sex-preselected embryo and offspring. The results revealed that the accuracy of sorted X- and Y-sperm was 94% and 89%, respectively. There was a decrease in blastocyst development rate in IVF with sorted sperm comparing to unsorted sperm, but the percentage of blastocysts on D6-D8 was not statistically different. Transplantation of the presumed X-embryos derived from IVF into a recipient resulted in the birth of female twins. These results indicated the feasibility of sperm sorting by flow cytometry and in vitro production of sex-preselected embryos and offspring in buffalo.
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Affiliation(s)
- Y Q Lu
- Animal Reproduction Institute, Guangxi Key Laboratory of Subtropical Bioresource Conservation and Utilization, Guangxi University, Nanning 530004, China
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Lu YQ, Zhang M, Meng B, Lu SS, Wei YM, Lu KH. Identification of X- and Y-chromosome bearing buffalo (Bubalus bubalis) sperm. Anim Reprod Sci 2006; 95:158-64. [PMID: 16413705 DOI: 10.1016/j.anireprosci.2005.11.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2005] [Accepted: 11/21/2005] [Indexed: 10/25/2022]
Abstract
The aim of this study was to identify the difference in DNA content characterizing the X- and Y-chromosome bearing sperm of buffalo. Sperm from six Murrah buffaloes and six Nili-Ravi buffaloes were collected and stained with Hoechst 33342 followed by flow cytometry analysis of the DNA content. Two symmetrical, separate but overlapping peaks presumed to be X- and Y-chromosome bearing sperm were detected. The difference in fluorescence intensity, which related to the DNA content, between the X- and Y-sperm was 3.59+/-0.11% for Murrah buffalo and 3.55+/-0.14% for Nili-Ravi buffalo, respectively. Significant differences were observed among males within each breed, but there were no differences between the averages of the two breeds. The results indicate that flow cytometric sorting of X- and Y-sperm of buffalo is feasible.
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Affiliation(s)
- Y Q Lu
- Animal Reproduction Institute, Guangxi Key Laboratory of Subtropical Bioresource Conservation and Utilization, Guangxi University, Nanning 530004, China
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Duan FK, Liu XD, He KB, Lu YQ, Wang L. Atmospheric aerosol concentration level and chemical characteristics of water-soluble ionic species in wintertime in Beijing, China. J Environ Monit 2003; 5:569-73. [PMID: 12948229 DOI: 10.1039/b303691j] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Total suspended particulate (TSP) samples were collected during wintertime from November 24, 1998 to February 12, 1999 in Beijing. Ionic species including Cl-, NO3(-), SO4(2-), Na+, NH4(+), K+, Mg2+ and Ca2+ were determined by Ion Chromatography (IC). The sum average concentration of all the determined ions accounted for 18.9% of the TSP concentration, and SO4(2-) appeared the dominant ion with an average concentration of 30.84 microg m(-3); the sum mass concentration of SO4(2-), NO3(-), Ca2+ and NH4(+) accounted for about 83.2% of all the eight ions measured. The study indicated that the chemical form of sulfate and ammonium varies with TSP concentration levels. During heavy pollution periods, the average TSP concentration was 0.66 mg m(-3), and the NH4(+)/SO4(2-) molar ratio was low (0.58). It indicated that sulfate may present as CaSO4 and (NH4)2SO4 x CaSO4 x 2H2O. When TSP concentration (average 0.186 mg m(-3)) was relatively low, the NH4(+)/SO4(2-) molar ratio was 1.94, close to the theoretical ratio of 2 of (NH4)2SO4. Under this condition (NH4)2SO4 is expected to exist as the major form of sulfate. When the TSP concentration level was medium (average 0.35 mg m(-3)), the NH4+/SO4(2-) molar ratio appeared an average value (1.27), (NH4)2SO4, (NH4)2SO4 x CaSO4 x 2H2O and CaSO4 are expected to be present in those aerosol particles. Meteorological conditions including wind speed and wind direction were related to the TSP concentration level.
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Affiliation(s)
- F K Duan
- Department of Environmental Science & Engineering, Tsinghua University, Beijing 100084, P.R. China
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Liu LP, Liu JF, Lu YQ. Effects of Sheng-Mai injection on the PRPP synthetase activity in BFU-es and CFU-es from bone marrows of mice with benzene-induced aplastic anemia. Life Sci 2001; 69:1373-9. [PMID: 11531161 DOI: 10.1016/s0024-3205(01)01224-3] [Citation(s) in RCA: 8] [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: 11/27/2022]
Abstract
160 Kunming mice were divided at random into 3 groups. Group 1: normal control (40 mice). Group 2: aplastic anemia (AA) control (60 mice); benzene inhalation was carried out for 2.5 months and sterilized normal saline was injected i.p. for another 6 weeks. Group 3: treated AA (60 mice); benzene was administered by inhalation in a similar manner, Sheng-Mai Injection (SMI) was administered i.p. for 6 weeks after the AA models were established. SMI is a famous Chinese traditional prescription of Panax ginseng C.A. Meyer (0.1 g/ml), Ophiopogon japonicus (Thunb.) Ker-Gawl (0.312 g/ml) and Fructus Schisandrae (0.158 g/ml). Activities of phosphoribosylpyrophosphate (PRPP) synthetase in BFU-Es and CFU-Es were estimated by ion pair reversed phase HPLC (IPrHPLC). Accompanying the sharp drop in counts of erythroid progenitor cells, the PRPP synthetase activity in CFU-Es of AA mice was reduced significantly (P<0.01), whereas there were no remarkable changes of this enzyme activity in their BFU-Es compared with the control group. Both the counts of erythroid progenitor cells and PRPP synthetase activity in CFU-Es returned nearly to normal levels following treatment with SMI of mice in Group 3 (P<0.01). Our results suggest that the attenuation of PRPP synthetase activity in peripheral erythrocytes of AA patients may originate from the weakening of activity of this enzyme in CFU-Es from their bone marrow. The impairment of PRPP formation would explain ATP depletion and disorders of energy metabolism in AA erythrocytes. SMI can distinctly increase the reduced quantity of erythroid progenitor cells and promote rapid restoration of PRPP synthetase activity in CFU-Es of AA mice.
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Affiliation(s)
- L P Liu
- Research Laboratory of Blood Biochemistry, Hunan Medical University, Changsha, P.R.China
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Xie ZW, Lu YQ, Ge S, Hong DY, Li FZ. Clonality in wild rice (Oryza rufipogon, Poaceae) and its implications for conservation management. Am J Bot 2001; 88:1058-1064. [PMID: 11410470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Correlations were examined between habitat characters and clonal structures determined by the RAPD (random amplified polymorphic DNA) assay in five populations of Oryza rufipogon in China. Nine of 175 decameric primers were used in the study because they reproducibly amplified polymorphisms. The extent of clonality together with the clonal and sexual reproductive strategies varied greatly among the five populations and correlated with the habitats where they occur. The populations under serious disturbance or seasonal drought tended to have small clones with relatively high clonal diversity caused by sexual reproduction, whereas the populations with little disturbance and sufficient supply of water were prone to have large clones with relatively low clonal variation and low sexual reproduction. Therefore, the dynamics of sexual vs. clonal reproduction of this species depended mainly on environmental factors, such as external disturbance and water supply, rather than latitudes indicated by previous study. These results have important implications for in situ conservation of O. rufipogon. Adequate external disturbance and water supply control are essential for maintaining high clone diversity of in situ conserved populations. According to the extent of clonality of the populations examined, we recommend that an interval of >12 m should be required for collecting samples for ex situ conservation and for population genetic studies to capture possible genetic diversity for O. rufipogon in China.
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Affiliation(s)
- Z W Xie
- Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, P. R. China
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Lu YQ, Yu R. Synergistic protection of allopregnanolone and phenobarbital against maximal electroshock seizures in mice. Acta Pharmacol Sin 2001; 22:361-4. [PMID: 11742590] [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: 02/22/2023] Open
Abstract
AIM To examine the interactions of allopregnanolone and phenobarbital for the protection against seizures. METHODS The protective activity of allopregnanolone and/or phenobarbital against seizures was studied in the C57 mice, using the maximal electroshock seizure (MES) test. The modulations by allopregnanolone and/or phenobarbital at the GABA(A) receptor were also characterized using the [3H]flunitrazepam binding in the membrane preparation of mouse cerebral cortex. RESULTS Pretreatment with phenobarbital produced a dose-dependent protective effect against seizures. The ED50 value of phenobarbital was 2.61 (95 % confidence limits: 1.59 - 4.26) mg . kg-1. Likewise, the ED50 value of allopregnanolone was 0.11 (0.06 - 0.18) mg . kg-1. The combination of allopregnanolone and phenobarbital (1:20) resulted in an ED50 value of 0.73 (0.44 - 1.21) mg . kg-1 with the Q value smaller than 1. In measuring the enhancement of [3H]flunitrazepam binding, we found that the pattern for the concentration-effect curves of phenobarbital with or without allopregnanolone was consistent with that of the theoretical curves of functional synergism. CONCLUSION There was a synergism between allopregnanolone and phenobarbital for the protective activity against seizures. Also there was a functional synergism between these two agents for the enhancement of [3H]flunitrazepam binding to the GABAA receptor complex in the brain.
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Affiliation(s)
- Y Q Lu
- Department of Pharmacology, Medical Center, Fudan University, Shanghai 200032, China
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Lu YQ, Zhang SY, Jian XC, Ren LF. [Construction of three-dimensional finite element model of rat molar]. Hunan Yi Ke Da Xue Xue Bao 2001; 26:4-6. [PMID: 12536601] [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: 02/28/2023]
Abstract
OBJECTIVE This paper was to construct three-dimensional finite element model of rat molar, and to access mechanical stress distribution in the tooth and periodontia. METHODS The first maxillary molar of adult rat was moved for 2 weeks with initial force of 40 g and 100 g. The histological specimen of tooth and surrounding structures were sectioned serially at 4 microns-thick slices in the coronary direction. The section's microscopic photographic images were made every 140 microns. The structural information of images was traced and fed into computer for three-dimensional reconstruction of the structure and finite element model. RESULTS The stress distribution in periodontia which lies between tooth and alveolar bone was very complicated. CONCLUSION The three-dimensional finite element model of rat molar is simple, precise, and effective for analyzing stress in tooth and periodontia.
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Affiliation(s)
- Y Q Lu
- Department of Stomatology, Xiangya Hospital, Central South University, Changsha 410078
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Qian YG, Lu YQ, Hu JB, Mao YN, Li QL. [Electrochemical behavior of ofloxacin at Pt/GC ion implantation modified electrode and its application]. Yao Xue Xue Bao 2001; 36:127-30. [PMID: 12579880] [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: 02/28/2023]
Abstract
AIM To study the electrochemical behavior of ofloxacin at Pt/GC ion implantation modified electrode. METHODS With Pt/GC ion implantation modified electrode as working electrode, the behavior of ofloxacin was studied by voltammetry in 0.40 mol.L-1 KCl solution. RESULTS A sensitive reductive peak of ofloxacin was obtained by linear sweep voltammetry. The peak potential was -1.35 V (vs SCE). The peak current was proportional to the concentration of ofloxacin over the range of 1.0 x 10(-6)-3.0 x 10(-5) mol.L-1 with the detection limit of 5.0 x 10(-7) mol.L-1. The behavior of reduction wave was studied and applied to determination of ofloxacin in tablets. CONCLUSION The reduction process was irreversible. The element composition, atomicity form and depth of distribution at the surface of Pt/GC electrode were determined by Auger electron spectroscopy (AES), X-ray photoelectron spectroscopy (XPS) and scanning electron microscope (SEM). The catalysis behavior and reaction mechanism at Pt/GC modified electrode was also studied.
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Affiliation(s)
- Y G Qian
- Department of Chemistry, Beijing Normal University, Beijing 100875, China
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Wang Y, Lu YQ. [Hepatic echinococcosis]. Zhongguo Ji Sheng Chong Xue Yu Ji Sheng Chong Bing Za Zhi 2001; 19:316-7. [PMID: 12572055] [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: 04/20/2023]
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Abstract
OBJECTIVES To investigate the potential for plant derived estrogens (phytoestrogens) genistein, phloretin, biochanin A and zearalanone to relax rabbit coronary arteries in vitro and to determine the mechanism(s) of such relaxation. BACKGROUND Epidemiological data suggests a reduction in the incidence of coronary heart disease in humans who have a high intake of phytoestrogens. METHODS Isolated rabbit coronary artery rings were suspended in individual organ baths, precontracted with potassium chloride (30 mM), and the relaxing effects and mechanisms of relaxation to genistein, phloretin, biochanin A and zearalanone were determined by measurement of isometric tension. RESULTS Genistein, phloretin and biochanin A induced significant gender-independent relaxation in rings with and without endothelium. Inhibition of nitric oxide and prostaglandin synthesis with L-NAME and indomethacin had no effect on genistein-induced relaxation. Relaxation was unaffected by the specific estrogen receptor antagonist ICI 182,780, the ATP-sensitive potassium channel inhibitor glibenclamide and the potassium channel inhibitor, barium chloride. Calcium concentration-dependent contraction curves in high potassium depolarization medium were significantly shifted to the right and downward after incubation with genistein and zearalanone. An inhibitory effect of genistein (2 microM) on L-type calcium current in guinea-pig ventricular myocytes confirmed a calcium antagonist relaxing mechanism of action. In healthy volunteers, plasma genistein levels of approximately 2 microM are achieved after ingestion of a commercially available soy protein drink (Supro) containing 37 mg genistein. CONCLUSIONS This study demonstrates that phytoestrogens induce endothelium-independent relaxation of coronary arteries; the mechanism involves calcium antagonism. These mechanisms may contribute to the potential long-term cardiovascular protective effect of these substances.
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Affiliation(s)
- G A Figtree
- Cardiac Medicine, Imperial College School of Medicine, National Heart & Lung Institute, London, United Kingdom
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Ren XQ, Lu YQ, Deng W, Li HL, Chu YC. [Effect of jiaweiyiguanjian decoction on hypothalamus-pituitary-thyroid gland (HPT) in rat model with Yin-deficiency of liver and kidney induced by slow irritation]. Zhongguo Zhong Yao Za Zhi 2000; 25:172-4. [PMID: 12212104] [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: 02/26/2023]
Abstract
OBJECTIVE To explore the mechanism of Jiaweiyiguanjian decoction in nourishing the liver and kidney. METHOD A rat model with Yin-deficiency of liver and kidney was made by way of slow irritation. Thyrotropin-releasing-hormone(TRH) of thyron and blood, TSH of pituitary and blood, thyroxine, 3,5,3',5-tetraiodothyronine(FT4) and 3,3',5-traiodothyronine(FT4), 3,3',5-traiodothyronine(rT3) were used as indexes to study the effect of the decoction on HPT. RESULT The TRH Secretion from hypothalamus increased (P < 0.05), TSH of pituitary and blood reduced(P < 0.05), FT3 and FT4 of blood decreased at the same time and rT3 of blood, increased. The indexes of the treatment group were found almost the same as the those of the normal control group. CONCLUSION Jiaweiyiguanjian Decoction could adjust HPT.
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Affiliation(s)
- X Q Ren
- Henan College of Traditional Chinese Medicine, Zhengzhou 450003, Henan, China
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Wan J, Xie YH, Xia H, Lu YQ. Age might influence the frequency distribution of metoprolol hydroxylation polymorphism in a Chinese population. Pharmacol Toxicol 1997; 80:167-70. [PMID: 9140135 DOI: 10.1111/j.1600-0773.1997.tb00391.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The frequency distribution of the 8-hour urinary ratio of metoprolol/alpha-hydroxymetoprolol (MR) was investigated in 206 healthy rural Chinese volunteers. The frequency of the poor metabolizer phenotype of metoprolol alpha-hydroxylation was 0% in this Chinese population. When the 206 subjects were subgrouped into four groups by age, the excretion of alpha-hydroxymetoprolol was significantly lower in the subjects with age older than 41 years compared to two younger groups (16-30 years), and the metoprolol hydroxylation metabolic ratio(metoprolol/a-hydroxymetoprolol, MR) was higher in these middle-aged subjects, indicating that age may affect the frequency distribution of the 8-hour urinary MR or log MR, although multiple regression analysis did not show a significant correlation between age, urine volume and MR. Also, a significant correlation was found between age and the excretion (percentage of dose) of alpha-hydroxymetoprolol in 8-hour urine (r = 0.259, P < 0.001). On the other hand, both multiple regression analysis and nonparametric tests showed that the larger the amount of urine excreted, the more metoprolol was recovered, demonstrating that the urinary excretion of unchanged metoprolol is renal flow-limited.
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Affiliation(s)
- J Wan
- Department of Pharmacology, Hunan Medical University, Changsha, China
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Lu YQ, Zhang HY. [Clinical study of application of vein-protective measures in patients with senile dementia]. Zhonghua Hu Li Za Zhi 1996; 31:712-3. [PMID: 9304943] [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: 02/05/2023]
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Abstract
1. The disposition of diazepam and desmethyldiazepam was studied in 21 healthy male Chinese subjects who were phenotyped with mephenytoin. Four poor metabolizers (PM) were identified by phenotyping with mephenytoin and by genotyping for CYP2C19. 2. Serum diazepam and desmethyldiazepam concentrations were measured by high performance liquid chromatography in samples drawn up to 24 days after administration. 3. The plasma elimination half-lives of diazepam (100.8 +/- 32.3 h) and desmethyldiazepam (219.9 +/- 62.7 h) in PMs were significantly longer than those (34.7 +/- 23.0 h for diazepam, 103.1 +/- 25.9 h for desmethyldiazepam) of the 17 phenotyped extensive metabolizers (EM), and those (30.8 +/- 24.9 h for diazepam, 103.1 +/- 27.5 h for desmethyldiazepam) of the five genotyped EMs. 4. The mephenytoin S/R ratios were significantly correlated with the plasma half-lives of diazepam (r = 0.543, P < 0.05) and desmethyldiazepam (r = 0.522, P < 0.05), and with the clearance (r = -0.524, P < 0.05) of diazepam in 21 subjects. 5. These results are compatible with the conclusion that both diazepam and desmethyldiazepam are metabolized by cytochrome P450 CYP2C19 in the Chinese population. 6. The mephenytoin S/R ratios in nine EMs who drank alcohol frequently were significantly higher than those of seven EMs who were non-drinkers, but the plasma kinetics of diazepam and desmethyldiazepam were not significantly different between the two groups. The explanation for these finding is not clear.
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Affiliation(s)
- J Wan
- Pharmacogenetics Research Institute, Human Medical University, Changsha, China
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36
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Hu WS, Liu ZG, Lu YQ, Zhu SN, Feng D. Pulsed-laser deposition and optical properties of completely (001) textured optical waveguiding LiNbO(3) films upon SiO(2)/Si substrates. Opt Lett 1996; 21:946-948. [PMID: 19876213 DOI: 10.1364/ol.21.000946] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Completely (001) textured LiNbO(3) films have been fabricated upon thermally oxidized SiO(2)/Si substrates by in situ application of a low electric field in a pulsed-laser deposition system. The biased voltage was 70-75 V on parallel electrodes separated by 7.0 mm. Li-enriched crystal and ceramic targets were used. The achieved films were nearly stoichiometric and have smooth surfaces. Waveguiding performance of the films was demonstrated by a prism-coupling method. The refractive indices were calculated on the basis of isotropic and anisotropic waveguide theories. A low-light propagation loss of 1.9 dB/cm in the films was achieved. It is expected that the films can be used in integrated-optical devices that require d(33), gamma(33), (33), and n(33) elements.
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37
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Qiu FH, Liu L, Luo Y, Liu F, Lu YQ. [Systematic analysis of basic drugs in plasma using X-5 solid-phase extraction GC-FID and GC-MS]. Yao Xue Xue Bao 1996; 31:296-299. [PMID: 9208649] [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
A systematic determination method for 34 basic drugs in human plasma is described. Drugs were extracted from plasma at pH 10 using X-5 resin as adsorbent, then identified and quantitated by capillary GC-FID and GC-MS. The detection limits for most drugs are in the range of 0.5-2.0 micrograms.ml-1. Precision and linearity of the method are satisfactory for clinical toxicological applications.
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Affiliation(s)
- F H Qiu
- Institute of Pharmacology and Toxicology, Academy of Military Medical Sciences, Beijing
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38
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Qiu FH, Liu L, Luo Y, Lu YQ. [A double column double pH solid phase extraction and capillary GC/FID method for rapid simultaneous determination of acidic and basic drugs in human plasma]. Yao Xue Xue Bao 1996; 31:205-8. [PMID: 9206267] [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: 02/04/2023]
Abstract
A capillary gas chromatographic method for the rapid simultaneous identification and quantitation of acidic and basic drugs in human plasma is presented. A special double column solid phase extraction device was designed, in which two X-5 resin columns can extract drugs at different pH. The detection limits for acidic and basic drugs can reach 0.5 microgram.ml-1, while the time needed is only half of that when using commercial solid phase extraction cartridges.
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Affiliation(s)
- F H Qiu
- Institute of Toxicology and Pharmacology, Academy of Military Medical Sciences, Beijing
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39
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de Morais SM, Goldstein JA, Xie HG, Huang SL, Lu YQ, Xia H, Xiao ZS, Ile N, Zhou HH. Genetic analysis of the S-mephenytoin polymorphism in a Chinese population. Clin Pharmacol Ther 1995; 58:404-11. [PMID: 7586932 DOI: 10.1016/0009-9236(95)90053-5] [Citation(s) in RCA: 102] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The 4'-hydroxylation of S-mephenytoin exhibits a polymorphism in humans, with the poor metabolizer phenotype exhibiting a lower frequency in white (3% to 5%) than in Oriental populations (13% to 23%). Two mutations in CYP2C19 (CYP2C19m1 and CYP2C19m2) have recently been described that account for approximately 85% of white and 100% of Japanese poor metabolizers. This study examines whether these mutations account for the poor metabolizer phenotype in the Chinese population. The metabolism of S-mephenytoin exhibited a bimodal distribution in 244 unrelated Chinese subjects, although the distribution of the two phenotypes overlapped. In 75 selected Chinese subjects, CYP2C19 genotype analysis predicted the phenotype with 100% accuracy. The frequency of the poor metabolizer phenotype was approximately 11% (95% confidence interval 7% to 15%). The frequency of the CYP2C19m1 allele was 0.289, whereas that of CYP2C19m2 was 0.044. Homozygous extensive metabolizers had slightly lower ratios of S/R-mephenytoin compared with heterozygous extensive metabolizers, showing a gene-dosage effect. These data show the advantages of genotype analysis in investigations of the mephenytoin phenotype in Oriental subjects.
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Affiliation(s)
- S M de Morais
- Laboratory of Biochemical Risk Analysis, National Institute of Environmental Health Sciences, Research Triangle Park 27709, USA
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40
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Zheng P, Chen G, Shi NC, Zhou SP, Lu YQ, Yao MH, He ZY. Effects of toquipidine on ionic channels of cultured embryonic Xenopus laevis myoblasts and neurons. Zhongguo Yao Li Xue Bao 1995; 16:427-39. [PMID: 8701760] [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: 02/01/2023]
Abstract
AIM To study the effects of toquipidine (1-p-methyl-phenyl-2-(alpha-piperidinoacetyl)-1, 2, 3, 4-tetrahydroisoquinoline hydrochloride, Toq), a new anti-arrhythmic agent first synthesized in China, on ionic channels. METHODS Ionic channel currents were recorded by whole-cell patch clamp technique in cultured embryonic Xenopus laevis myoblasts and neurons. RESULTS Toq (0.1, 1, 10, and 100 mumol L-1) caused a concentration-dependent inhibition of the Na+ currents with IC50 7.2 mumol L-1 (5.3-9.8 mumol L-1). Toq (10 mumol L-1) also suppressed the high-voltage-activated Ca2+ currents in neurons. But the steady-state outward K+ currents in myoblasts were activated by Toq (10 mumol L-1). CONCLUSION Toq blocked the Na+ and Ca2+ channels and opened the steady-state outward K+ channels.
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Affiliation(s)
- P Zheng
- Department of Pharmacology, Shanghai Medical University, China
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41
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Ding YH, Lu YQ, Cheng JG. [Molecular degradation forms of plasma fibronectin in patients with chronic obstructive pulmonary disease]. Zhonghua Jie He He Hu Xi Za Zhi 1994; 17:305-7, 320. [PMID: 7712576] [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: 01/26/2023]
Abstract
In order to explore the molecular degradation forms of plasma fibronectin (Fn) in patients with chronic obstructive pulmonary disease (COPD) and its clinical value. We measured the concentration of plasma Fn and analysed Fn molecular forms. The results suggested that the increase of Fn degradation is one of the causes of plasma Fn decline in patients with COPD. The obvious correlations were found between the extent of Fn degradation and the severity of the disease. In view of the documented influences of Fn fragments on the host defense, the increase of Fn fragments in plasma of COPD patients may be an additional factor of inflammatory amplification loops and more contributing to the decrease of plasma opsonic activity.
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42
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Chen GF, Lu YQ, Yang ZC. Identification of beta-adrenoceptors in mouse myometrium by radioligand binding study. Zhongguo Yao Li Xue Bao 1994; 15:336-8. [PMID: 7801776] [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 binding of radioligand to cell membrane prepared from mouse myometrium was used to identify the characteristics of beta-adrenoceptors. Uteri were taken from mature mice (Kunming Strain) weighing 40 +/- 5 g pretreated with estradiol benzoate 1 mg.kg-1.d-1 ip for 2 d. The binding of [3H]dihydroalprenolol ([3H]DHA) to uterine membrane was saturable, having a Bmax of 378 fmol/mg protein and a KD of 3.1 nmol.L-1. The slope of Hill plot (nH = 1.03) indicated the absence of cooperative interactions. IC50 and K1 values of l-norepinephrine (NE), dl-propranol (Pro), d-timolol (d-Tim), and l-Tim competed for the [3H]DHA binding sites were 171 +/- 10, 10.3 +/- 4.3, 6.5 +/- 2.1, 0.40 +/- 0.23 nmol.L-1 and 113 +/- 6, 6.3 +/- 2.8, 4.0 +/- 1.3, 0.25 +/- 0.14 nmol.L-1, respectively. These 4 agents competed for the [3H]DHA binding sites in an order of potency: l-Tim > d-Tim > Pro > NE. Atenolol (Ate) did not compete for [3H]DHA binding sites. The results suggested that these binding sites for [3H]DHA in mouse myometrium appeared to be beta 2-adrenoceptor.
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Affiliation(s)
- G F Chen
- Department of Pharmacology, School of Basic Medical Sciences, Shanghai Medical University, China
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43
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Liu JF, Lu YQ, Roth EF, Nagel RL, Blumenfeld OO. Involvement of membrane glycophorins in human erythrocytes invaded by Plasmodium falciparum. Chin Med J (Engl) 1993; 106:307-12. [PMID: 8325160] [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: 01/29/2023] Open
Abstract
The extent of participation and changes of glycophorins (GPs) and membrane proteins in the merozite-human erythrocyte interaction during the invasion of Plasmodium falciparum (Pf) were studied by immunoblotting techniques. Polyclonal antisera to alpha GP and to its C-terminal fragment (residues 82-131) as well as M and N specific monoclonal antibodies (MoAbs) were used. We examined the GPs in the parasite-free saponin lysates, saponin pellets and the culture supernatants of the infected erythrocytes in comparison with the mock cultured normal RBC. Excepting the usual GP patterns, a GP with molecular weight of 77.5 K (band 1') existed in the parasitized erythrocytes and their saponin pellets and several GP bands ranging from 28K to 54K were present in saponin pellets when probed with anti-GP and anti-peptide C sera. This reflected the disintegration of erythrocyte membrane alpha GP through the invasion of Pf. The alpha 2 GP in the saponin pellets of the parasitized MM erythrocytes surprisingly cross-reacted with the N MoAb, implying that it may have come from the intermingling of the host alpha GP in MM erythrocytes with the parasite alpha GP reacting to N MoAb. The saponin pellets of parasitized erythrocytes preserved a considerable amount of ankyrin, band 3, protein 4.1 and 4.2, while the GP bands were densely mixed with the parasite proteins and the disintegrated products of membrane proteins. Four erythrocyte-binding antigens (EBA) of 143 K, 135 K, 115 K and 107 K recognized by malaria hyperimmune serum were detected in the culture supernatants of Pf, some of them appeared in the infected erythrocytes, their saponin lysates and pellets.
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Affiliation(s)
- J F Liu
- Department of Biochemistry, Hunan Medical University, Changsha
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44
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Abstract
A case of elliptocytosis associated with an undescribed abnormal alpha glycophorin (alpha GP) is reported. Using immunoblotting techniques, a clear-cut minor band 6' was detected emerging just behind the monomer of delta GP (band 6) when probed with anti-alpha GP antiserum. It also reacted with anti-peptide C antiserum, suggesting that this new band with a molecular weight of 24 K is related to the structural alteration of alpha GP and not delta GP. The erythrocyte membrane proteins of the patient exhibited a quite normal pattern, with a normal alpha spectrin/beta spectrin ratio, but the reaction with anti-protein 4.1 serum confirmed the increase in proteolytic susceptibility of her protein 4.1. The results of DNA mapping implied that the abnormality may be due to a short deletion of the heterozygote. The significance of deviation involving the alpha GP and protein 4.1 to the elliptocytic change of erythrocyte shape is briefly discussed.
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Affiliation(s)
- Y Q Lu
- Department of Biochemistry, Hunan Medical University, Changsha, People's Republic of China
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45
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Shen DL, Jin GZ, He YF, Zhang ZD, Sun Z, Lu YQ, Yang ZC. [Effect of (-)-stepholidine on blood pressure and alpha-adrenoceptor agonists-, KCl- and CaCl2-evoked contractions of aortic strips]. Zhongguo Yao Li Xue Bao 1991; 12:514-8. [PMID: 1668566] [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
Iv (-)-SPD lowered the blood pressure in anesthetized rat, the ED50 value was 5.1 +/- 2.5 mg.kg-1. In the experiments of rat and rabbit aortic strips, (-)-SPD 0.3-100.0 mumol.L-1 inhibited the contraction initiated by clonidine (alpha 2) and phenylephrine (alpha 1) and shifted the dose-response curve to the right parallely without change in maximum response. The inhibitory ratio of (-)-SPD acting on alpha 2/alpha 1 adrenergic receptors was about 7.2, and (-)-SPD thus was predominant inhibition on alpha 2 adrenergic receptors. In the experiment of aortic strips from reserpinized rabbits, the inhibition of (-)-SPD on contraction evoked by clonidine was diminished markedly. The results suggest that (-)-SPD stimulated mainly the alpha 2-adrenergic receptors of presynaptic nerve endings. Moreover (-)-SPD 1 mumol.L-1 inhibited the release of intracellular Ca2+ initiated by NE. (-)-SPD 3-30 mumol.L-1 blocked the voltage-dependent Ca2+ channel.
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Affiliation(s)
- D L Shen
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences
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46
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Dong H, Lu YQ, Yang QQ, Wang Q, Yang ZC. Antagonistic effects of dihydropyridines and verapamil on CaCl2 and 5-HT-evoked contraction in porcine coronary artery. Zhongguo Yao Li Xue Bao 1991; 12:395-8. [PMID: 1819891] [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
In porcine coronary arterial strips, the antagonistic effects of nifedipine (Nif), nimodipine (Nim), nicardipine (Nic), felodipine (Fel), and verapamil (Ver) to CaCl2-evoked contraction in Ca(2+)-free, K(+)-depolarized solution were greater than that to 5-HT. The order of potency (pD2') was Nif (9.1) greater than Fel (8.4) greater than Nim (7.9) greater than Nic (7.8) greater than Ver (7.2) to CaCl2 and Nif (8.3) greater than Nim (7.5) greater than Fel (6.8) greater than Ver (5.6) greater than Nic (5.3) to 5-HT. Ver inhibited 2 components of 5-HT-evoked contraction in Ca(2+)-free solution, but Fel inhibited only extracellular Ca(2+)-dependent contraction, suggesting that their action modes are different.
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Affiliation(s)
- H Dong
- Department of Pharmacology, Faculty of Basic Medical Sciences, Shanghai Medical University, China
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47
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Lu YQ, Huang CH, Hu HL, Huang PY. Studies on function of Hb Jianghua [beta 120 (GH3) Lys----Ile]. Chin Med J (Engl) 1990; 103:3-6. [PMID: 2112440] [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
Hemoglobin Jianghua (Hb Jianghua) is a new fast--moving hemoglobin variant found in China, being named after the county where it was detected. Having its primary structure analysed, we report in this paper the results of studies on its function. The absorption spectrum, response to allosteric effectors and oxygen equilibrium of the chromatographically purified Hb Jianghua showed its characteristics similar to those of purified Hb A. Its alkaline Bohr effect was normal. This indicates that a substitution of isoleucine for the 120th lysine residue of the beta chain had no significant influence upon the function of Hb molecule.
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Affiliation(s)
- Y Q Lu
- Department of Biochemistry, Human Medical University, Changsha
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48
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Tang JH, Lu YQ. [Metabolism of phospholipids on erythrocyte membranes]. Sheng Li Ke Xue Jin Zhan 1990; 21:31-5. [PMID: 2193389] [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: 12/30/2022]
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49
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Sun FY, Li KY, Zhang LM, Lu YQ, Zhang AZ. [Autoradiographic study on etorphine and phencyclidine specific binding sites in rabbit mesenteric artery]. Zhongguo Yao Li Xue Bao 1989; 10:298-301. [PMID: 2624111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Autoradiography was used to study the localization of kappa and PCP/sigma receptors in the blood vessels. Slices of rabbit mesenteric arteries were incubated with 0.4 nmol/L [3H]etorphine or/and 10 mumol/L etorphine for 45 min at 25 degrees C, or incubated with 5.2 nmol/L [3H]PCP or/and 20 mumol/L PCP for 60 min at 4 degrees C. Then, slices were covered with emulsion coated coverslip and kept for 8-10 wk at 4 degrees C. The results were as follows: Microscopy Autoradiographic analysis indicated that etorphine and PCP specific binding sites were both located in the outer-layer and the smooth muscle of the artery. However, most of these binding sites were lost in the 6-OHDA pretreated arteries in which the adrenergic nerve endings were destroyed. Microspectrophotometry The absorbance (A) of [3H]etorphine autoradiographic density for total binding (TB) and nonspecific binding (NSB) in control group were 0.416 +/- 0.056 and 0.044 +/- 0.011, respectively (P less than 0.01), and for TB after incubation with 6-OHDA was 0.068 +/- 0.013 which was different from the A value of TB in the control (P less than 0.01). The A value of [3H]PCP autoradiographic density for TB and NSB in the control were 0.546 +/- 0.087 and 0.023 +/- 0.060, respectively (P less than 0.01), and for TB after incubation with 6-OHDA was 0.065 +/- 0.015 which was significantly less than that of TB in the control group (P less than 0.01).(ABSTRACT TRUNCATED AT 250 WORDS)
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Liu JF, Lu YQ, Liu XQ, Huang PY, Huang CH, Chen SS, Jia PC, Liang CC, Zuo CR. Hb G-Taichung [alpha 74(EF3)Asp----His] in a Hunanese family in China. Hemoglobin 1989; 13:163-7. [PMID: 2737911 DOI: 10.3109/03630268908998066] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- J F Liu
- Department of Biochemistry, Hunan Medical University, Changsha, People's Republic of China
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