1.CSP genotypes and antifungal susceptibility of Aspergillus fumigatus isolates from clinical settings in different regions of China
Mengdan TANG ; Jianfeng ZHENG ; Liangliang SHEN ; Miao JIANG ; Jingjun ZHAO
Chinese Journal of Dermatology 2014;47(8):555-558
Objective To describe the CSP genotypic profile in clinical isolates of Aspergillus fumigates from different regions of China,and to investigate if there is a difference in antifungal susceptibility among A.fumigates of different CSP genotypes and from different regions.Methods Totally,112 A.fumigates strains clinically isolated from Fujian,Shanghai,Hebei and Beijing were included in this study,and identified according to macro-and micro-morphological characters,growth temperature and β-tubulin sequence.Classic A.fumigatus strains were typed according to CSP gene sequence.The minimal inhibitory concentrations (MICs) of voriconazole,itraconazole and amphotericin B to A.fumigates were determined in accordance with the National Committee for Clinical Laboratory Standards (NCCLS) M38-A protocol.Results All the strains were identified as classic A.fumigates,and fall into 11 CSP genotypes.The most common genotypes were t04A (n =32),t03 (n =17) and t01 (n =24) in all the strains,tl0,t04A and t01 in Fujian,t04A and t01 in Shanghai,t01,t03 and t04A in Hebei,t02,t04A,t01and t03 in Beijing.One A.fumigatus strain was identified as a new CSP type t25 in Fujian,which showed no obvious difference in morphology,growth rate or appropriate growth temperature from the other CSP genotypes of A.fumigatus strains.No statistical difference was found in the susceptibility to amphotericin B,itraconazole or fluconazole among different genotypes of A.fumigates,whereas the MICs of itraconazole were significantly lower in A.fumigates isolates from Fujian than in those from the other three regions.Conclusions The CSP genotypic profile of A.fumigates varies in clinical isolates from different regions.No significant difference is observed in the susceptibility to amphotericin B,itraconazole or fluconazole among different CSP genotypes of A.fumigates,but the susceptibility to itraconazole is somewhat different between A.fumigates strains from different regions.
2.Combination of conjoint fascia sheath suspension and levator palpebrae superioris shortening for treatment of congenital severe blepharoptosis
Linhai CHEN ; Guanghao LIN ; Peng WEI ; Mengdan TANG ; Changyan WU
Chinese Journal of Medical Aesthetics and Cosmetology 2022;28(6):484-487
Objective:To investigate the therapeutic effect of conjoint fascia sheath suspension and levator palpebrae muscle shortening on congenital severe blepharoptosis.Methods:From June 2014 to December 2018, 30 cases (40 eyes) of congenital severe ptosis were treated in Ningbo First Hospital and Shaoxing Women and Children's Hospital. All patients were corrected by conjoint fascia sheath suspension and levator palpebrae muscle shortening. Six months after operation, the distance between the middle point of upper eyelid margin and corneal reflex point was measured to evaluate the correction effect of blepharoptosis; the improvement of upper eyelid appearance was evaluated by 5-point Likert scale (LS), and the incidence of complications was counted.Results:Thirty patients (40 eyes) were followed up for 6-12 months. Correction effect showed that preoperative marginal reflex distance (MRD) was (0.10±0.05) and postoperative MRD was (3.80±0.55); the difference was statistically significant ( t=0.95, P<0.05); 38 eyes (95%) were corrected and 2 eyes (5%) were undercorrected; appearance of upper eyelid showed that preoperative LS was (0.50±0.05) and postoperative LS (3.80±0.55); the difference was statistically significant ( t=0.98, P<0.05). Only one case was complicated with keratitis caused by improper early nursing after incomplete closure exposure, and the patient was cured by sealing the eyes combined with drug conservative treatment. Conclusions:Combined conjoint fascial sheath suspension and levator palpebrae shortening in the treatment of severe blepharoptosis has significant effect, with the advantages of simple operation, small surgical trauma, low recurrence rate, low incidence of complications, high predictability of surgical results and high satisfactory rate of patients.
3.Effect of basic fibroblast growth factor on autophagy of nerve cells in rats after traumatic brain injury
Chonghu TANG ; Zhanjian FANG ; Yilan HU ; Yudong SHAN ; Yun TONG ; Mengdan CHEN ; Xiaojie WEI ; Fenzan WU
Chinese Journal of Trauma 2019;35(5):407-415
Objective To investigate the effect of basic fibroblast growth factor (bFGF) on autophagy of nerve cells in rats after traumatic brain injury (TBI).Methods A total of 120 healthy adult male SD rats were randomly divided into sham group,TBI + vehicle group,and TBI + bFGF group by random number table method,with 40 rats in each group.PinPointTM Precision Cortical Impactor was used to simulate the pathological damage after TBI.In the sham group,the dura was exposed without impact.In the TBI + bFGF group,250 μg/kg of human recombinant bFGF was given in the nasal cavity 1 hour before the modeling,while in the sham group and TBI + Vehicle group,the same amount of saline was given in the nasal cavity 1 hour before the modeling.The necrotic cells were observed by propidium iodide(PI) staining 6 hours after injury.The effect of bFGF on the nerve function after TBI in rats was evaluated with modified neurological severity score (mNSS) 24 hours after injury.The water content of brain tissue was measured by dry and wet method 48 hours after injury.The ratio of Beclin-1,P62 protein and microtubule-associated protein 1 light 3 (LC3)-Ⅱ/Ⅰ protein was detected by western blot.The volume of brain injury was calculated by integral method of brain tissue section.The positive neuron specific nuclear protein (NeuN) cells were observed by immunofluorescence staining.The apoptotic cells were observed by TUNEL.Results Compared with the sham group [(4.0 ± 1.2) %],the percentage of necrotic cells in TBI + vehicle group [(54.3 ± 10.1) %] and TBI + bFGF group [(34.5 ± 10.5) %] increased significantly (P < 0.05),but the percentage of necrotic cells in TBI + bFGF group increased less than that in TBI + vehicle group (P < 0.05).Compared with the sham group [(0.3 ± 0.5)points],the mNSS in the TBI + vehicle group [(5.8 ±0.8)points] and TBI + bFGF group [(4.7 ± 1.1) points] were significantly increased (P < 0.05),but the mNSS of TBI + bFGF group was lower than that of TBI + vehicle group (P < 0.05).Compared with the sham group [(76.7 ± 0.7) %],the water content of brain tissue of TBI + vehicle group [(79.2 ± 0.5) %] and TBI + bFGF group [(78.4 ± 1.0) %] were significantly increased (P <0.05),but the water content of TBI + bFGF group was significantly lower than that of TBI + vehicle group (P <0.05).Compared with the sham group,protein expression of Beclin-1 and LC3-I/Ⅰ in TBI + vehicle group and TBI +bFGF group were significantly improved (P < 0.05),P62 protein expression was significantly decreased (P < 0.05),the volume of brain tissue injury was significantly increased (P < 0.05),the number of positive NeuN cells increased significantly (P < 0.05),and the number of apoptotic cells and apoptotic cells were significantly increased (P <0.05).Compared with the TBI + Vehicle group,the up-regulation of Beclin-1 protein and LC3-Ⅱ/Ⅰ protein ratio was obviously inhibited in the TBI + bFGF group (P < 0.05),the down-regulation of P62 protien was significantly suppressed,the volume of brain tissue injury was significantly decreased,and the number of positive NeuN cells and apoptotic cells was significantly reduced (P < 0.05).Conclusion The bFGF can significantly inhibit excessive autophagy in rats after TBI,reduce brain edema,reduce cell apoptosis and necrosis,and improve neural function.
4.Construction of the competency model for junior caregivers for the elderly based on the combination of medical and endowment model.
Li YANG ; Jinghui ZHANG ; Binbin XU ; Siyuan TANG ; Jianmei HOU ; Mengdan MA ; Zhengkun SHI
Journal of Central South University(Medical Sciences) 2018;43(6):679-684
To construct a competency model for junior caregivers for the elderly and to provide a reference for the selection, evaluation and training for the junior caregivers for the elderly.
Methods: Firstly, we drafted the primary competency model for junior caregivers for the elderly through literature review. Then, we used Delphi method to carry out 2 rounds of questionnaire survey for 20 experts to optimize the indicators for primary model. The weight of each indicator is determined by analytic hierarchy process (AHP) and expert sequencing method.
Results: The effective recovery rates of the two-round questionnaire were 87% and 100%, respectively. The expert authority coefficient was 0.70-0.93, and the average authority coefficient was 0.80. The final version of the competency model for junior caregivers for the elderly included 4 first-grade indexes, 11 second-grade indexes and 37 third-grade indexes.
Conclusion: The competency model for the junior caregivers for the elderly is reliable and can be used as the reference standard for the selection, evaluation and training for the junior caregivers for the elderly.
Aged
;
Caregivers
;
standards
;
Clinical Competence
;
Delphi Technique
;
Health Services for the Aged
;
standards
;
Humans
;
Medical Staff, Hospital
;
standards
;
Reference Standards
;
Surveys and Questionnaires
5.Mechanisms of alternative splicing in regulating plant flowering: a review.
Huanhuan LU ; Qinlin DENG ; Mengdan WU ; Zhimin WANG ; Dayong WEI ; Hebing WANG ; Huafeng XIANG ; Hongcheng ZHANG ; Qinglin TANG
Chinese Journal of Biotechnology 2021;37(9):2991-3004
Flowering is a critical transitional stage during plant growth and development, and is closely related to seed production and crop yield. The flowering transition is regulated by complex genetic networks, whereas many flowering-related genes generate multiple transcripts through alternative splicing to regulate flowering time. This paper summarizes the molecular mechanisms of alternative splicing in regulating plant flowering from several perspectives, future research directions are also envisioned.
Alternative Splicing/genetics*
;
Arabidopsis/metabolism*
;
Arabidopsis Proteins/genetics*
;
Flowers/genetics*
6.Cucumber downy mildew and the mechanisms of host resistance: a review.
Shicheng XU ; Hebing WANG ; Junjie FENG ; Huafeng XIANG ; Mengdan WU ; Zhimin WANG ; Dayong WEI ; Hongcheng ZHANG ; Qinglin TANG
Chinese Journal of Biotechnology 2022;38(5):1724-1737
The cultivation and production of cucumber are seriously affected by downy mildew caused by Pseudoperonospora cubensis. Downy mildew damages leaves, stems and inflorescences, and then reduces the yield and quality of cucumber. This review summarized the research advances in cucumber downy mildew, including pathogen detection and defense pathways, regulatory factors, mining of pathogens-resistant candidate genes, proteomic and genomic analysis, and development of QTL remarks. This review may facilitate clarifying the resistance mechanisms of cucumber to downy mildew.
Cucumis sativus/genetics*
;
Oomycetes/genetics*
;
Peronospora
;
Plant Diseases/genetics*
;
Proteomics
7.Molecular mechanisms of RPD3 family members in regulating plant development and environmental responses.
Qinlin DENG ; Huanhuan LU ; Mengdan WU ; Maolin RAN ; Zhimin WANG ; Dayong WEI ; Qinglin TANG
Chinese Journal of Biotechnology 2021;37(8):2645-2657
Lysine acetylation is one of the major post-translational modifications and plays critical roles in regulating gene expression and protein function. Histone deacetylases (HDACs) are responsible for the removal of acetyl groups from the lysines of both histone and non-histone proteins. The RPD3 family is the most widely studied HDACs. This article summarizes the regulatory mechanisms of Arabidopsis RPD3 family in several growth and development processes, which provide a reference for studying the mechanisms of RPD3 family members in regulating plant development. Moreover, this review may provide ideas and clues for exploring the functions of other members of HDACs family.
Arabidopsis/metabolism*
;
Histone Deacetylases/metabolism*
;
Histones
;
Plant Development/genetics*