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Ma DY, Teng HH, Zhao JK. [Clinicopathological study of thymic lipofibroadenoma]. Zhonghua Bing Li Xue Za Zhi 2023; 52:163-165. [PMID: 36748138 DOI: 10.3760/cma.j.cn112151-20220607-00504] [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: 02/08/2023]
Affiliation(s)
- D Y Ma
- Department of Pathology, Qinghai Red Cross Hospital, Xining 810000, China
| | - H H Teng
- Department of Pathology, Shanghai Chest Hospital, Affiliated to Shanghai Jiaotong University, Shanghai 200030, China
| | - J K Zhao
- Department of Pathology, Shanghai Chest Hospital, Affiliated to Shanghai Jiaotong University, Shanghai 200030, China
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Li X, Li CL, Liu YG, Liu JY, Wang JF, Li ZM, Ma DY, Hu D. [The long-term efficacy of left cardiac sympathetic denervation in long QT syndrome]. Zhonghua Xin Xue Guan Bing Za Zhi 2022; 50:556-562. [PMID: 35705464 DOI: 10.3760/cma.j.cn112148-20211122-01009] [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: 06/15/2023]
Abstract
Objective: To investigate the long-term efficacy and safety of left cardiac sympathetic denervation(LCSD) for long QT syndrome(LQTS) patients with either recurrence on drug therapy intolerance/refusal. Methods: This study was a retrospective cohort study. The cases selected from 193 patients with LQTS who were enrolled in the Chinese Channelopathy Registry Study from November 1999 to November 2012. This study selected 28 LQTS patients with either recurrence on drug therapy intolerance/refusal and underwent LCSD surgery in the Peking University People's Hospital or Beijing Tongren Hospital. The patients were allocated into 3 groups: high-risk group(n=13, baseline QTc ≥550 ms or symptomatic in the first year of life or highly malignant genetics); intermediate-risk group(n=10, 500 ms≤baseline QTc<550 ms, symptomatic after the first year and without highly malignant genetics); low-risk group(n=5, baseline QTc<500 ms, symptomatic after the first year and without highly malignant genetics). LCSD was performed with the traditional supraclavicular approach or video assisted thoracoscopic surgery (VATS). Patients were regularly followed up until 20 years after the surgery. Data were collected before and 1 year after surgery and at the last follow-up. Patients' electrocardiograph(ECG), cardiac events and surgery-related complications were recorded. Kaplan-Meier survival analysis was used to determine the cardiac event-free survival based on different risk stratification and genotypes. Results: A total of 28 LQTS patients, aged 20.5 (15.0, 37.5) and underwent LCSD surgery, were enrolled in this study, including 23(82.1%) women. There were 11(39.3%) patients treated with traditional approach while 17(60.7%) with VATS-LCSD. There were 19(67.9%) patients had positive genetic test results, including 4 LQT1, 12 LQT2, 1 LQT1/LQT2 mixed type, and 2 Jervell-Lange-Nielsen (JLN) syndrome. The median follow-up period was 189.3(138.7, 204.9) months. The dropout rate was 10.7%(3/28) while 3 patients in the intermediate-risk group were lost to follow-up. Horner syndrome occurred in 1 patient (in the high-risk group). Sudden cardiac deaths were observed in 3 (12.0%) patients (all in the high-risk group), and 12 patients (48.0%) had syncope recurrences (2 in low-risk group, 3 in intermediate-risk group and 7 in high-risk group). A significant reduction in the mean yearly episodes of cardiac events was observed, from (3.5±3.3) before LCSD to(0.2±0.1) at one year after LCSD and (0.5±0.8) at last follow up(P<0.001). The mean QTc was shortened from (545.7±51.2)ms before the surgery to (489.0±40.1)ms at the last follow-up (P<0.001). Among the 20 patients with basic QTc ≥500 ms and completing the follow-up, the QTc intervals of 11(55.0%) patients were shortened to below 500 ms. The event free survival rates for any cardiac events after LCSD decreased sequentially in the low-, intermediate- and high-risk groups, and the difference was statistically significant (χ²=7.24, log-rank P=0.026). No difference was found in the event free survival rates among LQT1, LQT2 and undefined gene patients (χ²=5.20, log-rank P>0.05). Conclusions: LCSD surgery can reduce the incidence of cardiac events and shorten the QTc interval in patients with LQTS after the long-term follow-up. LCSD surgery is effective and safe for patients with LQTS ineffective or intolerant to drug therapy. However, high-risk patients are still at a high risk of sudden death after surgery and should be actively monitored and protected by combined therapies.
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Affiliation(s)
- X Li
- Department of Cardiology, Peking University People's Hospital, Beijing 100044, China
| | - C L Li
- Department of Cardiology, Peking University People's Hospital, Beijing 100044, China
| | - Y G Liu
- Department of Cardiology, Peking University People's Hospital, Beijing 100044, China
| | - J Y Liu
- Department of Thoracic Surgery, Peking University People's Hospital, Beijing 100044, China
| | - J F Wang
- Heart Center, Beijing Tongren Hospital, Capital Medical University, Beijing 100730, China
| | - Z M Li
- Department of Thoracic Surgery, Peking University People's Hospital, Beijing 100044, China
| | - D Y Ma
- Heart Center, Beijing Tongren Hospital, Capital Medical University, Beijing 100730, China
| | - Dayi Hu
- Department of Cardiology, Peking University People's Hospital, Beijing 100044, China
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Zhou YC, Pang XZ, Zhu HL, He Y, Shen Y, Ma DY. [The IL-6/STAT3 signaling pathway mediated by radiotherapy regulates the expression of PD-L1 in esophageal cancer cells]. Zhonghua Zhong Liu Za Zhi 2022; 44:389-394. [PMID: 35615794 DOI: 10.3760/cma.j.cn112152-20200320-00236] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/16/2023]
Abstract
Objective: To explore the possible mechanism of radiotherapy regulating the expression of PD-L1 in esophageal carcinoma. Methods: Three esophageal cancer cell lines (Eca109, Kyse150, TE1) were irradiated with different doses of X-rays, and 6 Gy+ AG490 group was set. The mRNA expression of PD-L1 was detected by real-time quantitative polymerase chain reaction (RT-qPCR). The protein expressions of PD-L1, STAT3, p-STAT3 were detected by western blotting and the protein level of IL-6 was detected by ELISA. Results: The mRNA expressions of PD-L1 in Eca109, Kyse150 and TE1 were 2.86±0.30, 960.01±21.27 and 106.78±6.67, higher than 1.07±0.15 in normal esophageal cell line HET-1A (P<0.01). The protein expressions of PD-L1 in Eca109, Kyse150 and TE1 were 0.091±0.036, 1.533±0.079 and 0.914±0.035, higher than 0.063±0.01 in normal esophageal cell line HET-1A (P<0.01). After 48 hours of 6 Gy irradiation, the protein expression levels of PD-L1 in Eca109, Kyse150 and TE1 were 0.135±0.007, 1.66±0.06 and 1.32±0.06, higher than 0.09±0.01, 1.21±0.05 and 0.93±0.03 of the 0 Gy group (P<0.01), while the protein expression levels of p-STAT3 in Eca109, Kyse150 and TE1 were 1.44±0.26, 0.75±0.04 and 1.92±0.17, higher than 0.18±0.05, 0.48±0.02 and 0.36±0.06 of the 0 Gy group (P<0.01). IL-6 protein expression increased significantly after different doses of irradiation (P<0.01). After the IL-6/STAT3 signaling pathway was blocked by the specific inhibitor AG490, the expressions of PD-L1 of Eca109, Kyse150 and TE1 in the 6 Gy+ AG490 groups were 0.11±0.03, 1.07±0.08 and 0.96±0.11, without significant differences of 0.09±0.01, 0.96±0.05 and 0.85±0.09 of the 0 Gy group (P>0.05), while the protein expressions of p-STAT3 were 0.76±0.11, 0.59±0.06 and 0.96±0.12, without significant differences of 0.67±0.08, 0.54±0.06 and 0.84±0.11 of the 0 Gy group (P>0.05). Conclusion: Radiotherapy may regulate the expression of PD-L1 in esophageal cancer cells through IL-6 / STAT3 signaling pathway.
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Affiliation(s)
- Y C Zhou
- Department of Oncology, Affiliated Hospital of North Sichuan Medical College, Nanchong 637000, China
| | - X Z Pang
- Department of Oncology, Affiliated Hospital of North Sichuan Medical College, Nanchong 637000, China
| | - H L Zhu
- Department of Oncology, Affiliated Hospital of North Sichuan Medical College, Nanchong 637000, China
| | - Y He
- Department of Oncology, Affiliated Hospital of North Sichuan Medical College, Nanchong 637000, China
| | - Y Shen
- Department of Oncology, Affiliated Hospital of North Sichuan Medical College, Nanchong 637000, China
| | - D Y Ma
- Department of Oncology, Affiliated Hospital of North Sichuan Medical College, Nanchong 637000, China
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Ma DY, Zhang YL, Xie JL, Zheng YY, Zhou XG. [CD3-positive diffuse large B-cell lymphoma of fusiform cells in colon]. Zhonghua Bing Li Xue Za Zhi 2019; 48:967-969. [PMID: 31818073 DOI: 10.3760/cma.j.issn.0529-5807.2019.12.011] [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)
- D Y Ma
- Department of Pathology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China; Department of Pathology, Qinghai Red Cross Hospital, Xining 810000, China
| | - Y L Zhang
- Department of Pathology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - J L Xie
- Department of Pathology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - Y Y Zheng
- Department of Pathology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - X G Zhou
- Department of Pathology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
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Bai DY, Xie JL, Zheng YY, Zhang YL, Ma DY, Zhou XG. [Paediatric nodal marginal zone lymphoma: a clinicopathological study of seven cases]. Zhonghua Bing Li Xue Za Zhi 2019; 48:369-372. [PMID: 31104676 DOI: 10.3760/cma.j.issn.0529-5807.2019.05.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Objective: To investigate the pathological features and clinical manifestation of pediatric nodal marginal zone lymphoma(NMZL). Methods: Histological morphology and immunophenotype of 7 cases of pediatric NMZL were retrospectively reviewed at Beijing Friendship Hospital Affiliated to Medical University between January 2008 to October 2018. Clonal rearrangement analysis was performed. Clinical information including patient follow-up data were analyzed. Results: All 7 patients were male with a median age of 15 years aged from 10 to 26 years. All patients presented with only lymph node enlargement without B symptoms, including cervical lymph node (5 cases), preauricular lymph node (1 case) and retroauricular lymph node (1 case). Histologically, all cases showed irregular large follicles on the edges with widened marginal areas and intervesicular areas, and lesional cells were uniform with progressive transformation of germinal center centers along with a small amount of intrinsic lymphoid tissue. All 7 cases showed diffuse CD20 positivity both follicle and interfollicular region along with 30%-40% positivity in the interfollicular region (pathological region). Markers of other B-cell lymphomas werenot expressed. All 7 cases were positive for immunoglobulin(Ig) gene rearrangement. None of the patients showed no recurrence up on after follow-up for an average of 13 months. Conclusions: Pediatric NMZL is a rare type of lymphoma that has a unique morphology and occurs almost exclusively in male children and young adults and often in head and neck lymph nodes. It has an excellent prognosis. Therefore, awareness of the disease with accurate diagnosis is important.
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Affiliation(s)
- D Y Bai
- Department of Pathology, Beijing Friendship Hospital Affiliated to Medical University, Beijing 100050, China (is Working on the Department of Pathology, the First Affiliated Hospital of Xiamen University, Xiamen 361003, China)
| | - J L Xie
- Department of Pathology, Beijing Friendship Hospital Affiliated to Medical University, Beijing 100050, China
| | - Y Y Zheng
- Department of Pathology, Beijing Friendship Hospital Affiliated to Medical University, Beijing 100050, China
| | - Y L Zhang
- Department of Pathology, Beijing Friendship Hospital Affiliated to Medical University, Beijing 100050, China
| | - D Y Ma
- Department of Pathology, Qinghai Red Cross Hospital, Xining 810000, China Bai
| | - X G Zhou
- Department of Pathology, Beijing Friendship Hospital Affiliated to Medical University, Beijing 100050, China
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Xie XC, Wang L, Jia TT, Ma DY. [Acute suppurative otitis media caused by pasteurella multocida :a case report]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2017; 31:153-154. [PMID: 29871210 DOI: 10.13201/j.issn.1001-1781.2017.02.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 05/17/2016] [Indexed: 11/12/2022]
Abstract
The pasteurella multocida (PM) is widely gastrointestinal parasitic on dogs, cats and other animals. The PM human infections is caused by animal bites orits close contact. Clinically foundin focal wound infection after bite, and acute suppurative otitis media reportshave not been caused by PM. A 45 years old nasopharyngeal cancer who sudden stabbing painof the left ear for 5h. Physical examination found that the left earexisted a lot of yellowish white purulent secretion. Distribution and drug sensitivity test of bacteria showed PM and it was sensitive to many antibiotics. nasopharygo fiberscope revealed that eustachian tube and theleft ear had a large number of purulentsecretion. The main diagnosis was: ①Recurrent nasopharyngealcarcinoma; ② Acute suppurative otitis media. TREATMENT according to the results of drug sensitive test and skin test inpatients with selection of levofloxacin (0.2 g/12 h), clindamycin (0.6 g/12 h) anti-infection treatment, the patient get better in the end.
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Liu S, Peng N, Bai Y, Xu H, Ma DY, Ma F, Xu K. General solvothermal approach to synthesize telluride nanotubes for thermoelectric applications. Dalton Trans 2017; 46:4174-4181. [DOI: 10.1039/c7dt00085e] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
One-dimensional tellurides are good candidates for thermoelectric applications, but the fabrication of telluride nanotubes is still challenging.
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Affiliation(s)
- Shuai Liu
- State Key Laboratory for Mechanical Behavior of Materials
- Xi'an Jiaotong University
- Xi'an 710049
- China
| | - Nan Peng
- State Key Laboratory for Mechanical Behavior of Materials
- Xi'an Jiaotong University
- Xi'an 710049
- China
- Suzhou school of Nano-Science and Nano-Engineering
| | - Yu Bai
- Suzhou school of Nano-Science and Nano-Engineering
- Xi'an Jiaotong University
- Suzhou
- China
| | - Huiyan Xu
- State Key Laboratory for Mechanical Behavior of Materials
- Xi'an Jiaotong University
- Xi'an 710049
- China
| | - D. Y. Ma
- State Key Laboratory for Mechanical Behavior of Materials
- Xi'an Jiaotong University
- Xi'an 710049
- China
| | - Fei Ma
- State Key Laboratory for Mechanical Behavior of Materials
- Xi'an Jiaotong University
- Xi'an 710049
- China
| | - Kewei Xu
- State Key Laboratory for Mechanical Behavior of Materials
- Xi'an Jiaotong University
- Xi'an 710049
- China
- Department of Physics and Opt-electronic Engineering
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Hu TW, Liu XT, Ma F, Ma DY, Xu KW, Chu PK. High-quality, single-layered epitaxial graphene fabricated on 6H-SiC (0001) by flash annealing in Pb atmosphere and mechanism. Nanotechnology 2015; 26:105708. [PMID: 25697237 DOI: 10.1088/0957-4484/26/10/105708] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
High-quality epitaxial graphene is produced on silicon carbide by flash annealing of 6H-SiC in a lead (Pb) atmosphere at ∼1400 °C for 30 s. Nearly three top bilayers of SiC are decomposed due to fast heating and cooling, and sublimation of Si atoms from SiC is retarded by the Pb atmosphere. The synergetic effects promote the growth of continuous single-layered graphene sheets on the SiC terraces, and a model is established to elucidate the effects and growth mechanism.
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Affiliation(s)
- T W Hu
- Department of Physics and Materials Science, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, People's Republic of China. State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, People's Republic of China
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Wen AY, You F, Sun P, Li J, Xu DD, Wu ZH, Ma DY, Zhang PJ. CpG methylation of dmrt1 and cyp19a promoters in relation to their sexual dimorphic expression in the Japanese flounder Paralichthys olivaceus. J Fish Biol 2014; 84:193-205. [PMID: 24372528 DOI: 10.1111/jfb.12277] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2013] [Accepted: 10/11/2013] [Indexed: 06/03/2023]
Abstract
To better understand the effects of DNA methylation on the expression patterns of dmrt1 (Doublesex and Mab-3-related transcription factor 1) and cyp19a (Cytochrome P450 19a) in the Japanese flounder Paralichthys olivaceus, quantitative expressions, cellular distributions and cytosine-p-guanine (CpG) methylation patterns of these two genes in the gonads were analysed. The results showed that P. olivaceus dmrt1 expression was 70 times higher in the testis than in the ovary (P < 0·05). Its mRNA was detected clearly in spermatocytes and Sertoli cells of the testis, but weakly in the ovary. Paralichthys olivaceus cyp19a expression was 40 times higher in the ovary than in the testis (P < 0·01). Its mRNA was detected clearly in follicular cells of the ovary, but weakly in spermatocytes of the testis. The dmrt1 promoter CpGs were not methylated in the testis, whereas 57·69% were methylated in the ovary. For the cyp19a promoter CpGs, 97·5% were methylated in the testis and 73·33% were methylated in the ovary. These findings demonstrate that P. olivaceus dmrt1 and cyp19a are sex-related genes with sexual dimorphic expression, CpG methylation levels of the two genes are consistent with their expression quantities, and this epigenetic modification can influence the differential expression of genes in the gonads of P. olivaceus.
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Affiliation(s)
- A Y Wen
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, Shandong, People's Republic of China; College of Earth Science, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
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Lin F, Zhao CY, Xu SH, Ma DY, Xiao ZZ, Xiao YS, Xu CA, Liu QH, Li J. Germline-specific and sexually dimorphic expression of a dead end gene homologue in turbot (Scophthalmus maximus). Theriogenology 2013; 80:665-72. [PMID: 23906483 DOI: 10.1016/j.theriogenology.2013.06.016] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2013] [Revised: 06/10/2013] [Accepted: 06/21/2013] [Indexed: 11/24/2022]
Abstract
Germ cells are indispensable for gonadal development and fertility. However, the physiological mechanisms regulating germ cell development in marine fish are poorly understood due to a lack of germ cell markers. The dead end (dnd) gene is a vertebrate-specific component of germplasm crucial for primordial germ cells (PGCs) migration and development in teleosts. In this study, we identified a dnd homologue (Smdnd) in turbot (Scophthalmus maximus) and investigated its expression pattern during embryogenesis and gonadal development. The deduced amino acid sequence of Smdnd shared several conserved motifs of Dnd homologues as well as high identity to other Dnd proteins. Phylogenetic analysis revealed that the SmDnd was closely related to its teleost counterparts. Reverse transcription polymerase chain reaction (RT-PCR) and in situ hybridization revealed that Smdnd transcripts could be exclusively detected in germ cells, including presumptive PGC and adult male and female germ cells. In addition, an interesting sexually dimorphic expression of Smdnd during gonadal development was observed by real-time PCR. Female turbot showed greater (P < 0.05) Smdnd expression than male before sex maturation. This difference reduced gradually due to the upregulation of Smdnd in the male during the period corresponding to spermatogonia proliferation and meiosis. These results indicate that Smdnd can be used as a germ cell marker in turbot. In addition, the temporal and sex differences in Smdnd expression indicate that this gene may play different roles in gonadal development in both sexes.
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Affiliation(s)
- F Lin
- Center of Biotechnology R&D, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, PR China
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Guo HF, Ma DY, Qin L, Yan P. Hydrothermal synthesis, crystal structure, and photoluminescence of a new 2D cadmium(II) complex: {Cd(C8H5O3Cl2)2(C10H8N2)} n. RUSS J COORD CHEM+ 2012. [DOI: 10.1134/s1070328412090035] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Tong XH, Xu SH, Liu QH, Li J, Xiao ZZ, Ma DY. Digestive enzyme activities of turbot (Scophthalmus maximus L.) during early developmental stages under culture condition. Fish Physiol Biochem 2012; 38:715-724. [PMID: 21938391 DOI: 10.1007/s10695-011-9553-5] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2011] [Accepted: 08/22/2011] [Indexed: 05/31/2023]
Abstract
Digestive enzyme activities were analysed in turbot (Scophthalmus maximus) from hatching until 60 days after hatching (DAH). Trypsin sharply increased to the climax at 17 DAH and decreased until 31 DAH followed by a stable level thereafter. Amylase was determined at 4 DAH, reached the maximum value at 19 DAH and declined sharply to 39 DAH and remained at a low level thereafter, suggesting the carbohydrate component should remain at a low level in formulated diets. Pepsin was detected at 9 DAH and increased to 34 DAH and then remained at a stable level. The above results revealed pancreatic enzymes are no longer main enzymes for food digestion after the formation of functional stomach. Leucine-alanine peptidase (Leu-ala) and alkaline phosphatase (AP) and leucine aminopeptidase N (LAP) were found in newly hatched larvae. Both AP and LAP activities markedly increased to 23 DAH, decreased abruptly to 50 DAH and increased gradually to 60 DAH. Leu-ala reached the plateau from 23 to 39 DAH, followed by a decline to 46 DAH and an increase until 60 DAH. The brush border membrane (BBM)-bound enzyme activities increased from 30% at 31 DAH to 81% at 38 DAH of the total activities, indicating the maturation of intestinal tract.
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Affiliation(s)
- X H Tong
- Yancheng Teachers University, Yancheng, People's Republic of China.
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Tong XH, Liu QH, Xu SH, Ma DY, Xiao ZZ, Xiao YS, Li J. Skeletal development and abnormalities of the vertebral column and of the fins in hatchery-reared turbot Scophthalmus maximus. J Fish Biol 2012; 80:486-502. [PMID: 22380549 DOI: 10.1111/j.1095-8649.2011.03173.x] [Citation(s) in RCA: 4] [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] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
To describe the skeletal development and abnormalities in turbot Scophthalmus maximus, samples were collected every day from hatching to 60 days after hatching (DAH). A whole-mount cartilage and bone-staining technique was used. Vertebral ontogeny started with the formation of anterior haemal arches at 5·1 mm standard length (L(S) ) c. 11 DAH, and was completed by the full attainment of parapophyses at 16·9 mm L(S) c. 31 DAH. Vertebral centra started to develop at 6·3 mm L(S) c. 16 DAH and ossification in all centra was visible at 11·0 mm L(S) c. 25 DAH. The caudal fin appeared at 5·1 mm L(S) c. 11 DAH and ossification was visible at 20·6 mm L(S) c. 37 DAH. The onset of dorsal and anal fin elements appeared at 5·8 mm L(S) c. 15 DAH and 6·3 mm L(S) c. 16 DAH, respectively. Ossifications of both dorsal fin and anal fin were visible at 20·6 mm L(S) c. 37 DAH. The pectorals were the only fins present before first feeding, their ossifications were completed at 23·5 mm L(S) c. 48 DAH. Pelvic fins began forming at 7·2 mm L(S) c. 19 DAH and calcification of the whole structure was visible at 19·8 mm L(S) c. 36 DAH. In the present study, 24 types of skeletal abnormalities were observed. About 51% of individuals presented skeletal abnormalities, and the highest occurrence was found in the haemal region of the vertebral column. As for each developmental stage, the most common abnormalities were in the dorsal fin during early metamorphic period (stage 2), vertebral fusion during climax metamorphosis (stage 3) and caudal fin abnormality during both late-metamorphic period (stage 4) and post-metamorphic period (stage 5). Such research will be useful for early detection of skeletal malformations during different growth periods of reared S. maximus.
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Affiliation(s)
- X H Tong
- Center of Biotechnology R&D, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, PR China
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Sui J, Ma DY, Liu QH, Xu SH, Xiao ZZ, Lin F, Xiao YS, Li J. Germ cells and fertilization differences among Japanese flounder Paralichthys olivaceus, summer flounder Paralichthys dentatus and their first and second generations. J Fish Biol 2012; 80:473-485. [PMID: 22380548 DOI: 10.1111/j.1095-8649.2011.03146.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The morphology of gametes and the fertilization biology of Japanese flounder Paralichthys olivaceus (Po), summer flounder Paralichthys dentatus (Pd) and their hybrids were examined. Multiple generations (two hybrids: Po♀× Pd♂ (F1) and Pd♀× Po♂; two backcrosses: F1♀× Po♂ and F1♀× Pd♂) were obtained by artificial insemination. Comparison of egg ultrastructure among Po, Pd and F1 showed the morphology of micropyle region and the distribution density of pores were species specific. There were c. 100-200 accessory openings around the micropyle in Po, but not in Pd and F1. The zona radiata thickness and number of parallel bands were similar between F1 and Po, which were different from Pd. Comparison of spermatozoa ultrastructure revealed a close relationship between Po and Pd. Cytologically, the six crosses obeyed normal fertilization and cleavage processes, and only one male pronucleus was observed in a fertilized egg, indicating a monospermic fertilization pattern. Analysis of the time distribution from fertilization to first cleavage revealed an obvious delay at pronucleus fusion in the Pd × Po cross. The delay might indicate some cytoplasmic-nuclear incompatibility during the process of fertilization.
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Affiliation(s)
- J Sui
- Center of Biotechnology R&D, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, PR China
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15
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Lin F, Liu QH, Xiao ZZ, Ma DY, Xu SH, Xiao YS, Li J. Study on permeability of DMSO in embryos of red seabream (Pagrus major) by capillary electrophoresis. Cryo Letters 2011; 32:339-348. [PMID: 22020413] [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: 05/31/2023]
Abstract
The objectives were to investigate the permeability of DMSO to red seabream (Pagrus major) embryos by capillary electrophoresis and the effects of DMSO concentrations (5 to 40 percent, volume basis) and immersion times (10, 30 and 60 min) on hatching rate and morphology. The results suggested the internal DMSO concentrations were positively related with the external concentrations and exposure times, while the hatching rate was negatively related. The hatching rate decreased drastically (less than 50 percent) after exposure in 35 percent, 20 percent and 15 percent DMSO for over 10, 30 and 60 min, respectively. In all groups, when hatching rate was greater 50 percent, the internal DMSO concentration was less than 2 percent, which was still insufficient for successful cryopreservation. Morphological changes indicated the chorion was permeable to the cryoprotectant. A sign of dehydration in yolk were observed, for a significant decrease in the maximal yolk sac diameter. However, further research was needed to investigate whether the DMSO permeated into the yolk.
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Affiliation(s)
- F Lin
- Center of Biotechnology R and D, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, P.R. China
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16
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Tong XH, Liu QH, Xu SH, Li J, Xiao ZZ, Ma DY. Changes in RNA, DNA, protein contents and growth of turbot Scophthalmus maximus larvae and juveniles. J Fish Biol 2010; 77:512-525. [PMID: 20701637 DOI: 10.1111/j.1095-8649.2010.02692.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: 05/29/2023]
Abstract
The growth potential of turbot Scophthalmus maximus larvae and juveniles was studied using nucleic acid-based indices and protein variables. The experiment was carried out from 4 to 60 days post hatching (dph). A significant increase in instantaneous growth rate during metamorphosis and retarded growth rate during post-metamorphic phase were observed. Ontogenetic patterns of DNA, RNA and protein all showed developmental stage-specific traits. The RNA:DNA ratio decreased up to 12 dph, then increased rapidly till 19 dph and fluctuated until 35 dph followed by a decline to the end. The RNA:DNA ratio was positively correlated with growth rate of juveniles during the post-metamorphic phase, whereas this ratio was not a sensitive indicator of growth during the pre-metamorphic phase and metamorphosis. The protein:DNA ratio showed a similar tendency to the RNA:DNA ratio. Changes of DNA content and protein:DNA ratio revealed that growth of S. maximus performed mainly by hyperplasia from 4 to 12 dph and hypertrophy until 21 dph during the pre-metamorphic larval phase. Growth was dominantly hypertrophical from the early- to mid-metamorphosing phase and hyperplastic thereafter. The results show that the DNA content and protein:DNA ratio can evaluate growth rates of larval and juvenile S. maximus on a cellular level.
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Affiliation(s)
- X H Tong
- Center of Biotechnology R&D, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, PR China
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Ma DY, Xu MY, Yang HC, Yang LZ. Effect of Inhibition of the Central Nucleus of the Amygdala and Drug Experience on the Regions Underlying Footshock-Induced Reinstatement of Morphine Seeking. J Int Med Res 2008; 36:992-1000. [PMID: 18831893 DOI: 10.1177/147323000803600516] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
This study assessed the effect of inhibition of the central nucleus of the amygdala (CeA) and drug experience on brain regions underlying footshock-induced reinstatement of morphine-seeking behaviour in rats. The difference in time spent in two chambers of a place-preference apparatus was used to measure morphine-conditioned place preference. Fos was measured as a marker of neuronal activation in the ventral bed nucleus of the stria terminalis (BNSTv) and ventral tegmental area (VTA). Footshock was found to enhance Fos expression in the BNSTv regardless of drug experience. In the VTA, morphine and footshock had an interactive effect on the increase in Fos expression. Inhibition of the CeA decreased Fos expression in the BNSTv regardless of drug experience, whereas in the VTA this effect only occurred in morphine-treated rats. These results suggest that drug experience has no differential effect on the BNSTv however morphine produces footshock sensitization in the VTA. CeA inhibition modulates the footshock-induced activity of these regions of the brain and attenuates reinstatement of drug seeking behaviour.
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Affiliation(s)
- DY Ma
- Department of Neurosurgery, Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - MY Xu
- Department of Physiology, Harbin Medical University, Harbin, China
| | - HC Yang
- Department of Neurosurgery, Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - LZ Yang
- Department of Neurosurgery, Second Affiliated Hospital of Harbin Medical University, Harbin, China
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Jiang RF, Ma DY, Zhao FJ, McGrath SP. Cadmium hyperaccumulation protects Thlaspi caerulescens from leaf feeding damage by thrips (Frankliniella occidentalis). New Phytol 2005; 167:805-14. [PMID: 16101917 DOI: 10.1111/j.1469-8137.2005.01452.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Metal hyperaccumulation has been proposed as a plant defensive strategy. Here, we investigated whether cadmium (Cd) hyperaccumulation protected Thlaspi caerulescens from leaf feeding damage by thrips (Frankliniella occidentalis). Two ecotypes differing in Cd accumulation, Ganges (high) and Prayon (low), were grown in compost amended with 0-1000 mg Cd kg(-1) in two experiments under glasshouse conditions. F2 and F3 plants from the Prayon x Ganges crosses were grown with 5 mg Cd kg(-1). Plants were naturally colonized by thrips and the leaf feeding damage index (LFDI) was assessed. The LFDI decreased significantly with increasing Cd in both ecotypes, and correlated with shoot Cd concentration in a log-linear fashion. Prayon was more attractive to thrips than Ganges, but the ecotypic difference in the LFDI was largely accounted for by the shoot Cd concentration. In the F2 and F3 plants, the LFDI correlated significantly and negatively with shoot Cd, but not with shoot zinc (Zn) or sulphur (S) concentrations. We conclude that Cd hyperaccumulation deters thrips from feeding on T. caerulescens leaves, which may offer an adaptive benefit to the plant.
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Affiliation(s)
- R F Jiang
- Key Laboratory of Plant Nutrition and Nutrient Cycling of Ministry of Agriculture, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100094, China
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