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1.
Adv Healthc Mater ; 7(23): e1800118, 2018 12.
Artigo em Inglês | MEDLINE | ID: mdl-30345648

RESUMO

Targeted therapy can improve the accuracy of diagnosis and treatment in the field of cancer management. Cellular surface engineering can enhance cell functions via mounting functional molecules onto cellular membranes. A novel amphiphilic hyperbranched polymer (AHP) conjugated with oleic acid (OA) and tumor-targeted ligand folic acid (FA) is employed. The lipophilic chain can self-assemble and infuse with the cytomembrane of bone marrow mesenchymal stem cells (BMSCs) with the end of FA left on the outside for targeting. The polymer tailored BMSCs can enhance tumor tropism in gastric cancer. BMSCs are characterized by the low immunogenicity and tumor tropism, which makes them promising targeting carriers. Regarding the integrated advantages of these two vectors, it is demonstrated that the functional amphiphilic AHP-OA-FA enhances the tumor tropism of BMSCs. Flow cytometry, standard MTT assay, and wound-healing assay show that AHP-OA-FA has no influence on CD expression, proliferative capacity, and cell motility of BMSCs, respectively. Furthermore, in vitro transwell assay and ex vivo fluorescence image verify that AHP-OA-FA enhances tumor tropism of BMSCs compared to BMSCs and AHP-OA-Rhodamine B-BMSCs. Finally, histological analysis demonstrates that AHP-OA-FA causes no damage to major organs. The results of this study suggest that living BMSCs self-assembled with a polymer might be a promising vehicle for targeted delivery to cancer cells.


Assuntos
Células-Tronco Mesenquimais/metabolismo , Polímeros/química , Animais , Células da Medula Óssea/citologia , Diferenciação Celular/efeitos dos fármacos , Linhagem Celular Tumoral , Movimento Celular/efeitos dos fármacos , Sobrevivência Celular/efeitos dos fármacos , Ácido Fólico/química , Ácido Fólico/farmacologia , Humanos , Transplante de Células-Tronco Mesenquimais , Células-Tronco Mesenquimais/citologia , Camundongos Nus , Neoplasias/metabolismo , Neoplasias/patologia , Ácido Oleico/química , Ácido Oleico/farmacologia , Imagem Óptica , Ratos , Ratos Sprague-Dawley , Rodaminas/química
2.
Crit Care ; 22(1): 173, 2018 07 06.
Artigo em Inglês | MEDLINE | ID: mdl-29980222

RESUMO

BACKGROUND: In the early stage of severe burn, patients often exhibit a high level of inflammatory mediators in blood and are likely to develop sepsis. High-volume haemofiltration (HVHF) can eliminate these inflammatory mediators. We hypothesised that early application of HVHF may be beneficial in reducing sepsis and improving the prognosis of patients with severe burns. METHODS: Adults patients with burns ≥ 50% total burn surface area (TBSA) and in whom the sum of deep partial and full-thickness burn areas was ≥ 30% were enrolled in this randomised prospective study, and they were divided into control (41 cases) and HVHF (41 cases) groups. Patients in the control group received standard management for major burns, whereas the HVHF group additionally received HVHF treatment (65 ml/kg/h for 3 consecutive days) within 3 days after burn. The incidence of sepsis and mortality, some laboratory data, levels of inflammatory cytokines in the blood, HLA-DR expression on CD14+ peripheral blood monocytes, the proportion of CD25+Foxp3+ in CD4+ T lymphocytes, and the counts of CD3+, CD4+ and CD8+ T lymphocytes were recorded within 28 days post-burn. RESULTS: The incidence of sepsis, septic shock and duration of vasopressor treatment were decreased significantly in the HVHF group. In addition, in the subgroup of patients with burns ≥ 80% TBSA, the 90-day mortality showed significant decreases in the HVHF group. The ratio of arterial oxygen partial pressure to the fraction of inspiration oxygen was improved after HVHF treatment. In the patients who received HVHF treatment, the blood levels of inflammatory cytokines, including tumour necrosis factor-α, interleukin (IL)-1ß, IL-6 and IL-8, as well as the blood level of procalcitonin were found to be lower than in the control group. Moreover, higher HLA-DR expression on CD14+ monocytes and a lower proportion of CD25+Foxp3+ in CD4+ T lymphocytes were observed in the patients in the HVHF group. CONCLUSIONS: Early application of HVHF benefits patients with severe burns, especially for those with a greater burn area (≥ 80% TBSA), decreasing the incidence of sepsis and mortality. This effect may be attributed to its early clearance of inflammatory mediators and the recovery of the patient's immune status. TRIAL REGISTRATION: Chinese Clinical Trial Register, ChiCTR-TRC-12002616 . Registered on 24 October 2012.


Assuntos
Queimaduras/complicações , Hemofiltração/normas , Sepse/terapia , Adulto , Queimaduras/mortalidade , Queimaduras/terapia , Citocinas/análise , Citocinas/sangue , Feminino , Hemofiltração/métodos , Humanos , Masculino , Pessoa de Meia-Idade , Escores de Disfunção Orgânica , Pró-Calcitonina/análise , Pró-Calcitonina/sangue , Prognóstico , Estudos Prospectivos , Prevenção Secundária/métodos , Prevenção Secundária/normas , Sepse/etiologia , Sepse/mortalidade , Índice de Gravidade de Doença , Estatísticas não Paramétricas
3.
Chin Med J (Engl) ; 128(20): 2787-91, 2015 Oct 20.
Artigo em Inglês | MEDLINE | ID: mdl-26481747

RESUMO

BACKGROUND: Hypertrophic scar is one of the most common complications and often causes the disfigurement or deformity in burn or trauma patients. Therapeutic methods on hypertrophic scar treatment have limitations due to the poor understanding of mechanisms of hypertrophic scar formation. To throw light on the molecular mechanism of hypertrophic scar formation will definitely improve the outcome of the treatment. This study aimed to illustrate the negative role of eukaryotic initiation factor 6 (eIF6) in the process of human hypertrophic scar formation, and provide a possible indicator of hypertrophic scar treatment and a potential target molecule for hypertrophic scar. METHODS: In the present study, we investigated the protein expression of eIF6 in the human hypertrophic scar of different periods by immunohistochemistry and Western blot analysis. RESULTS: In the hypertrophic scar tissue, eIF6 expression was significantly decreased and absent in the basal layer of epidermis in the early period, and increased slowly and began to appear in the basal layer of epidermis by the scar formation time. CONCLUSIONS: This study confirmed that eIF6 expression was significantly related to the development of hypertrophic scar, and the eIF6 may be a target molecule for hypertrophic scar control or could be an indicator of the outcomes for other treatment modalities.


Assuntos
Cicatriz Hipertrófica/metabolismo , Fatores de Iniciação de Peptídeos/metabolismo , Adulto , Western Blotting , Feminino , Regulação da Expressão Gênica/genética , Humanos , Imuno-Histoquímica , Masculino , Pessoa de Meia-Idade , Gravidez , Estudos Retrospectivos , Adulto Jovem
4.
J Cell Sci ; 128(21): 3977-89, 2015 Nov 01.
Artigo em Inglês | MEDLINE | ID: mdl-26395397

RESUMO

Eukaryotic initiation factor 6 (eIF6) is a pivotal regulator of ribosomal function, participating in translational control. Previously our data suggested that eIF6 acts as a key binding protein of P311 (a hypertrophic scar-related protein; also known as NREP). However, a comprehensive investigation of its functional role and the underlying mechanisms in modulation of myofibroblast (a key effector of hypertrophic scar formation) differentiation remains unclear. Here, we identified that eIF6 is a novel regulator of transforming growth factor-ß1 (TGF-ß1) expression at transcription level, which plays a key role in myofibroblast differentiation. Mechanistically, this effect is associated with eIF6 altering the occupancy of the TGF-ß1 promoter by H2A.Z (Swiss-Prot P0C0S6) and Sp1. Accordingly, modulation of eIF6 expression in myofibroblasts significantly affects their differentiation via the TGF-ß/Smad signaling pathway, which was verified in vivo by the observation that heterozygote eIF6(+/-) mice exhibited enhanced TGF-ß1 production coupled with increased α-smooth muscle actin (α-SMA)(+) myofibroblasts after skin injury. Overall, our data reveal a novel transcriptional regulatory mechanism of eIF6 that acts on facilitating Sp1 recruitment to TGF-ß1 promoter via H2A.Z depletion and thus results in increased TGF-ß1 transcription, which contributes to myofibroblast differentiation.


Assuntos
Diferenciação Celular/genética , Miofibroblastos/citologia , Miofibroblastos/metabolismo , Fatores de Iniciação de Peptídeos/metabolismo , Fator de Transcrição Sp1/metabolismo , Fator de Crescimento Transformador beta1/genética , Animais , Diferenciação Celular/fisiologia , Células Cultivadas , Camundongos , Camundongos Mutantes , Fatores de Iniciação de Peptídeos/genética , Transdução de Sinais/genética , Transdução de Sinais/fisiologia , Fator de Transcrição Sp1/genética
5.
Cell Biochem Biophys ; 69(3): 467-74, 2014 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-24446216

RESUMO

The objective of this study was to evaluate the efficacy and safety of a traditional Chinese medicine, Fufang Xuelian Burn Ointment (FXBO), to treat superficial and deep second-degree burn wounds. A four-center, randomized, controlled, and prospective study was conducted. Overall, 240 patients with either superficial or deep second-degree burn wounds were enrolled consecutively in this study. Patients who were randomly assigned to the control group (superficial: 72, deep: 48) underwent common burn wound therapy, whereas those randomized to the treatment group (superficial: 72, deep: 48) received common burn wound therapy plus topical FXBO. The healing rate, healing time, effective rate, and safety data were compared between the two groups. The baseline characteristics were comparable for the two groups. The healing rate was 94.79(±7.50) in the control group and 98.60(±5.69) in the FXBO group after 14 days for patients with superficial second-degree burn wounds (P = 0.000), and 95.17(±9.68) versus 97.44(±9.81) at 28 for deep second-degree burn wounds (P = 0.025). The median healing time in the FXBO group were 9 and 21 days for superficial and deep second-degree burns, respectively, compared to 10.5 and 22.5 days, respectively, in control group (P(superficial) = 0.000 and P(deep) = 0.009). The results of the effective rate showed that comprehensive efficacy of the FXBO group was improved compared to the control group for either superficial or deep second-degree burns (P(superficial) = 0.035 and P deep = 0.003). There were no reported drug-related adverse events in both groups. Therefore, FXBO was well tolerated and more effective than control group for treating superficial and deep second-degree burn wounds.


Assuntos
Queimaduras/tratamento farmacológico , Medicamentos de Ervas Chinesas/uso terapêutico , Adolescente , Adulto , Idoso , Queimaduras/fisiopatologia , Medicamentos de Ervas Chinesas/efeitos adversos , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Pomadas , Estudos Prospectivos , Segurança , Resultado do Tratamento , Cicatrização/efeitos dos fármacos , Adulto Jovem
6.
Zhonghua Shao Shang Za Zhi ; 29(5): 421-3, 2013 Oct.
Artigo em Chinês | MEDLINE | ID: mdl-24359998

RESUMO

Based on the result of randomized controlled trials and meta-analysis recently, the infusion of hydroxyethyl starch (HES) was not shown to over match routine crystalline solution in exerting resuscitation effect against hypovolemia of patients with burn shock, severe systematic infection, or other critical conditions, on the other hand, it may induce renal toxicity and other toxic and side effects. Since the pathological mechanism underlying hypovolemia during shock phase after burn is similar to that of severe systemic infection, we propose to suspend the use of HES for fluid resuscitation during the shock phase of severe burn until further elucidation.


Assuntos
Queimaduras/terapia , Hidratação , Derivados de Hidroxietil Amido , Hipovolemia/prevenção & controle , Choque/terapia , Contraindicações , Humanos , Ressuscitação
7.
Zhonghua Shao Shang Za Zhi ; 29(2): 177-80, 2013 Apr.
Artigo em Chinês | MEDLINE | ID: mdl-23985209

RESUMO

OBJECTIVE: To evaluate the effect of FLAMIGEL (hydrogel dressing) on the repair of residual burn wound. METHODS: Sixty burn patients with residual wounds hospitalized in 6 burn units from November 2011 to May 2012 were enrolled in the multi-center, randomized, and self-control clinical trial. Two residual wounds of each patient were divided into groups T (treated with FLAMIGEL) and C (treated with iodophor gauze) according to the random number table. On post treatment day (PTD) 7 and 14, wound healing rate was calculated, with the number of completely healed wound counted. The degree of pain patient felt during dressing change was evaluated using the visual analogue scale (VAS). The mean numbers of wounds with score equal to zero, more than zero and less than or equal to 3, more than 3 and less than or equal to 6, more than 6 and less than or equal to 10 were recorded respectively. Wound secretion or exudate samples were collected for bacterial culture, and the side effect was observed. Data were processed with repeated measure analysis of variance, t test, chi-square test, and nonparametric rank sum test. RESULTS: Wound healing rate of groups T, C on PTD 7 was respectively (67 ± 24)%, (45 ± 25)%, and it was respectively (92 ± 16)%, (72 ± 23)% on PTD 14. There was statistically significant difference in wound healing rate on PTD 7, 14 between group T and group C (F = 32.388, P < 0.01). Ten wounds in group T and four wounds in group C were healed completely on PTD 7, with no significant difference between them (χ(2) = 0, P > 0.05). Forty-two wounds in group T and seven wounds in group C healed completely on PTD 14, with statistically significant difference between them (χ(2) = 42.254, P < 0.01). Patients in group T felt mild pain during dressing change for 37 wounds, with VAS score higher than zero and lower than or equal to 3. Evident pain was observed in patients of group C during dressing change for 43 wounds, and it scored higher than 3 and less than or equal to 6 by VAS evaluation. There was statistically significant difference in mean number of wounds with different grade of VAS score between group T and group C (Z = -4.638, P < 0.01). Staphylococcus aureus, Pseudomonas aeruginosa, Klebsiella pneumoniae, E. coli, Baumanii, and Staphylococcus epidermidis were all detected in both groups, but there was no statistical difference between group T and group C (χ(2) = 0.051, P > 0.05). No side effect was observed in either of the two groups during the whole trial. CONCLUSIONS: FLAMIGEL can accelerate the healing of residual burn wounds and obviously relieve painful sensation during dressing change.


Assuntos
Bandagens , Queimaduras/terapia , Hidrogéis , Adolescente , Adulto , Idoso , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Adulto Jovem
8.
Zhonghua Shao Shang Za Zhi ; 28(3): 165-9, 2012 Jun.
Artigo em Chinês | MEDLINE | ID: mdl-22967969

RESUMO

OBJECTIVE: To retrospectively analyze the effect of restrictive fluid management strategy (RFMS) on the early pulmonary function and the prognosis of patients with extremely severe and extensive burn. METHODS: Thirteen patients with extremely severe burn hospitalized from June 2010 to November 2011, being treated with RFMS in the fluid reabsorption stage, were enrolled as treatment group. Twenty-six patients with extremely severe burn hospitalized from March 2008 to November 2011, being treated with normal fluid therapy in the fluid reabsorption stage, were enrolled as control group. The match proportion between treatment group and control group was 1:2. Fluid intake, fluid output, fluid balance (the difference between fluid intake and output), and plasma albumin level from post burn day (PBD) 3 to 10, pulmonary oxygenation index on PBD 3, 5, 7, 10, and 14, occurrence of lung and blood stream infections from PBD 7 to 14, and occurrence of acute respiratory distress syndrome (ARDS), occurrence of other organ complications, and mortality within 2 weeks post burn (PBW) were recorded and compared. Measurement data were processed with t test and randomized blocks analysis of variance, enumeration data were processed with Fisher's exact test. RESULTS: Daily fluid intake of patients showed a tendency of decrease in both groups from PBD 3 to 10. Except for that of PBD 4, there was no statistically significant difference between two groups in fluid intake (with F values from 0.072 to 1.939, P values all above 0.05). Daily fluid output of patients showed a tendency of increase in both groups from PBD 3 to 10. It peaked on PBD 10 in control group and PBD 6 in treatment group. The mean daily fluid output was higher in treatment group than in control group from PBD 4 to 9, but without statistically significant difference (with F values from 0.001 to 3.026, P values all above 0.05). Fluid balance lowered in both groups, and it was the lowest on PBD 10 in control group and PBD 6 in treatment group. Fluid balance was lower in treatment group than in control group from PBD 3 to 7, and it showed statistically significant differences on PBD 4, 5, and 6 (with F values from 4.799 to 8.031, P values below 0.05). Plasma albumin level was higher in treatment group than in control group from PBD 3 to 10, with statistically significant differences observed on PBD 4, 9, and 10 (with F values from 5.691 to 10.551, P < 0.05 or P < 0.01). Pulmonary oxygenation index was higher in treatment group than in control group from PBD 3 to 14, with statistically significant differences observed on PBD 7 (respectively 372 ± 78 in treatment group and 291 ± 92 in control group, F = 5.184, P < 0.05) and 14 (respectively 354 ± 39 in treatment group and 283 ± 72 in control group, F = 8.683, P < 0.05). Lung infection and blood stream infection were respectively observed in 1 and 4 patient (s) in treatment group, and 9 and 11 patients in control group from PBD 7 to 14. Occurrence of ARDS, occurrence of other organ complications, and mortality were fewer in treatment group than in control group within PBW 2, though the differences were not statistically significant (P values all above 0.05). CONCLUSIONS: RFMS is a useful strategy in improving early pulmonary oxygenation of patients with extremely severe and extensive burn by promoting the process of fluid reabsorption and rebalance. This strategy may be also beneficial for the prevention of organ complications as well as a better prognosis in severely burned patients.


Assuntos
Queimaduras/fisiopatologia , Queimaduras/terapia , Hidratação/métodos , Adolescente , Adulto , Feminino , Humanos , Pulmão/fisiopatologia , Masculino , Pessoa de Meia-Idade , Prognóstico , Estudos Retrospectivos , Equilíbrio Hidroeletrolítico , Adulto Jovem
9.
Zhonghua Shao Shang Za Zhi ; 28(3): 213-8, 2012 Jun.
Artigo em Chinês | MEDLINE | ID: mdl-22967977

RESUMO

OBJECTIVE: To study effects of P311 on the migration of epidermal stem cells (ESCs) in mice with superficial partial-thickness burn and injured cell model in vitro and to explore the mechanism. METHODS: (1) Eighteen male C(57) BL/6 mice were used. Fifteen of them were inflicted with superficial partial-thickness burn on the back. In three injured mice wound tissue and skin of wound edge were obtained at post burn hour (PBH) 6, 12, 24, 48, 72 respectively. The rest three mice were used as normal control, and samples were harvested with the same method as above. The expressions of P311 in harvested samples were assessed with biotin-streptavidin-peroxidase (SP) staining. (2) Six newly born C(57) BL/6 mice were intraperitoneally injected with 50 µg/g BrdU (two times a day) for three days for ESCs-labelling. Seven weeks later, the mice were inflicted with superficial partial-thickness burn on the back. Serial slices of burn wound tissue were prepared at PBH 72 and immunohistochemically stained with SP for observation of the co-localization of BrdU-positive ESCs and P311-positive cells. (3) The empty vector pAdEasy-enhanced green fluorescence protein (EGFP) and the adenovirus P311-expressing vector named pAdEasy-EGFP-P311 were constructed and packed. Human ESCs were isolated by the method of rapid adhesion to collagen IV. After being divided into P311 high-expressing group (n = 3) and EGFP control group (n = 3), the ESCs in two groups were respectively infected by pAdEasy-EGFP-P311 and pAdEasy-EGFP. Scratching assay was performed on ESCs in both groups after they were treated by mitomycin C for 2 hours. The remaining area within the fixed range was measured at post scratching hour (PSH) 0, 24, 48, and 72, and the wound-area healing rate was calculated. Data were processed with independent samples t test. RESULTS: (1) Expression amount of P311 was different in different parts of wound at different time points after burn. Expression amount of P311 in the newly formed epidermis and hair follicle of wound increased along with prolongation of time. Expression amount of P311 in the epidermis and hair follicle of wound edge peaked at PBH 12 and then decreased to normal levels at PBH 72. (2) Co-localization of BrdU-positive ESCs and P311-positive cells was observed in the new epidermal layer of wound tissue of mice, where ESCs were labeled by BrdU. (3) At PSH 48 and 72, wound-area healing rate was obviously higher in P311 high-expressing group [(69 ± 31)%, (89 ± 26)%] than in EGFP control group [(35 ± 12)%, (46 ± 31)%, with t values respectively -2.336, -2.611, P values all below 0.05]. CONCLUSIONS: P311 may promote the migration of ESCs both in rats with superficial partial-thickness burns and in injured cell model in vitro, and it may play an important role in wound healing.


Assuntos
Queimaduras/metabolismo , Células Epiteliais/metabolismo , Proteínas do Tecido Nervoso/metabolismo , Proteínas Oncogênicas/metabolismo , Animais , Animais Recém-Nascidos , Movimento Celular , Células Cultivadas , Modelos Animais de Doenças , Células Epidérmicas , Epiderme/lesões , Células Epiteliais/citologia , Humanos , Masculino , Camundongos , Camundongos Endogâmicos C57BL , Células-Tronco/citologia , Cicatrização
10.
Zhonghua Shao Shang Za Zhi ; 28(2): 125-9, 2012 Apr.
Artigo em Chinês | MEDLINE | ID: mdl-22781325

RESUMO

OBJECTIVE: To observe the effect of nitric oxide (NO) on adhesion, proliferation, and migration of human epidermal stem cells (ESC) in vitro. METHODS: ESC were isolated and cultured by the modified method of rapid attachment to type IV collagen. (1) Morphology of cells was observed under inverted phase-contrast microscope. Expression levels of integrin ß(1) and cytokeratin 19 (CK19) of cells were determined by Western blotting and immunofluorescence staining. (2) After being treated with scratching, ESC adhered to the wall was respectively treated with nitric oxide (NO) donor S-nitroso-N-acetylpenicillamine (SNAP) in the concentration of 1, 10, 100, 500 µmol/L. ESC without treatment of SNAP was used as control. The migration rate of ESC was detected at post scratching hour (PSH) 12 and 24. The chemotaxis of ESC (treated with SNAP in above-mentioned concentration) was tested by Transwell assay, and the transferred cell number was counted. (3) ESC was respectively treated with SNAP in the concentration of 10, 100, 500 µmol/L for 1 h. ESC without treatment of SNAP was used as control. The adhesion of ESC was detected with adhesion test, and the inhibition rate of adhesion was calculated. The proliferation of ESC (denoted as absorbance value) was determined by microplate reader at post-treatment hour (PTH) 0, 12, 24, 48. Data were processed with one-way analysis of variance and Dunnett t test. RESULTS: (1) Small clone formed on post culture days (PCD) 5 to 9. On PCD 10 to 14, cell proliferation sped up. CK19 and integrin ß(1) were detected to be expressed in the isolated cells. The cells were identified as ESC. (2) Compared with that of ESC without treatment of SNAP [(35.7 ± 0.3)%, (45.7 ± 5.0)%], migration of ESC treated with SNAP in the concentration from 1 to 100 µmol/L was promoted at PSH 12 and 24. Migration rates of ESC treated with 100 µmol/L SNAP were the highest [respectively (48.8 ± 2.7)%, (82.1 ± 15.8)%, with t value respectively 8.34, 5.10, P values both below 0.01]. The number of ESC transferred to membrane after being treated with 100 µmol/L SNAP was significantly larger than that of ESC without treatment of SNAP (t = 9.24, P = 0.00). (3) Absorbance values of ESC treated with 100, 500 µmol/L SNAP were obviously higher than that of ESC without treatment of SNAP (with t value respectively 4.30, 4.67, P values both equal to 0.00). Proliferation of ESC treated with 100, 500 µmol/L SNAP was obviously stronger than that of cells without treatment of SNAP at PTH 24, 48 (with t values from 2.84 to 8.17, P values all below 0.05). CONCLUSIONS: Exogenous NO in suitable concentration can promote the migration of human ESC. Exogenous NO can inhibit the adhesion and promote the proliferation of human ESC in vitro.


Assuntos
Células Epiteliais/citologia , Óxido Nítrico/farmacologia , Células-Tronco/citologia , Movimento Celular/efeitos dos fármacos , Proliferação de Células , Células Cultivadas , Células Epiteliais/efeitos dos fármacos , Humanos , Células-Tronco/efeitos dos fármacos
11.
Zhonghua Shao Shang Za Zhi ; 27(1): 37-9, 2011 Feb.
Artigo em Chinês | MEDLINE | ID: mdl-21591339

RESUMO

It is essential for the development of modern clinical medicine to establish a professional facility and team for wound healing. There is some successful experience of constructing and running the wound healing center to be mirrored at home and abroad. The construction of the facility and team for wound healing will be promoted by guideline issuing, profession certification, and others, which would push forward the clinical treatment and basic research of wound healing.


Assuntos
Hospitais Especializados/organização & administração , Equipe de Assistência ao Paciente/organização & administração , Cicatrização , Órgãos dos Sistemas de Saúde , Humanos , Procedimentos Cirúrgicos Reconstrutivos
12.
Zhonghua Shao Shang Za Zhi ; 26(2): 146-9, 2010 Apr.
Artigo em Chinês | MEDLINE | ID: mdl-20723415

RESUMO

OBJECTIVE: To investigate the effect of exogenous nitric oxide (NO) on the migration of HaCaT cell and its possible mechanism. METHODS: Sodium nitroprusside (SNP) was used as the donor of NO. Different concentrations of SNP (0.1, 1.0, 10.0, 100.0, 1000.0 micromol/L) were added into nutrient culture medium of HaCaT cells. Cell migration rate was observed and calculated at post scratching hour (PSH) 0 (immediately after scratching), 6, 12, 24, 48. The most suitable concentration of SNP and culture duration were selected as stimulation condition. Cytoskeletons of HaCaT cells were observed under confocal laser scanning microscope. The expressions of integrin beta 1, RhoA, Rac1 and Cdc42 of cells in experiment group (cultured with 10.0 micromol/L SNP for 24 hours) and negative control group were determined at mRNA and protein levels with RT-PCR and Western blot respectively. Data were processed with one-way analysis of variance (ANOVA) and repeated measure ANOVA. RESULTS: Migration rate of HaCaT cells in each group increased gradually as time after scratching went on. There were significant differences between PSH 6-48 and PSH 0 in cells cultured with 10.0 micromol/L SNP (F = 31.002, P values all below 0.05). Pili were rarely observed in negative control group with slender stress fibers in cells. In comparison, the amount of pili amount increased obviously in experiment group with thickened stress fibers. Compared with those of cells in control group (RhoA protein expression = 0.64 +/- 0.04), integrin beta 1 expression decreased obviously (F = 8.25, P = 0.015), RhoA (0.92 +/- 0.04), Cdc42 and Rac1 were up-regulated at both protein (with F value respectively 7.25, 14.10, 6.50, P values all below 0.05) and mRNA levels (with F value respectively 23.67, 10.39, 9.52, P values all below 0.05). CONCLUSIONS: Exogenous NO in suitable concentration can promote the proliferation and migration of HaCaT cell, suggesting it exerts significant effect in wound repair. The changed cytoskeletons and the down-regulated integrin beta 1 expression may be involved in this process.


Assuntos
Movimento Celular/efeitos dos fármacos , Citoesqueleto/efeitos dos fármacos , Óxido Nítrico/farmacologia , Linhagem Celular , Citoesqueleto/metabolismo , Humanos , RNA Mensageiro/genética , Proteína rhoA de Ligação ao GTP/genética , Proteína rhoA de Ligação ao GTP/metabolismo
13.
Zhonghua Shao Shang Za Zhi ; 25(2): 91-3, 2009 Apr.
Artigo em Chinês | MEDLINE | ID: mdl-19799030

RESUMO

OBJECTIVE: To address the features of the fungal infection after burn injury in clinic. METHODS: Three thousand nine hundred and nine burn patients admitted to our institute from Jan. 2003 to Dec. 2006 were involved in this study. Two thousand two hundred and seventy-one samples were harvested for fungal detection by culture from 467 patients suspected to be infected by fungi based on their clinic manifestations. The collected samples included wound tissue, blood, urine, stool, sputum, catheters and others. The antibiotic sensitivity of the identified fungi were determined by routine method. When same kind of fungus was found from different samples taken from one patient, it was recorded as one positive sample. The samples were ranked in an ascending order as wound secretion, stool, urine, sputum and bronchial alveolar lavage fluid, arteriovenous catheter or urinary catheter, blood. Only the positive sample of the highest rank source was recorded as the positive strain of fungus from this particular patient. RESULTS: It was found 61 fungal positive samples from the 2271 samples collected. Out of 467 patients, 38 strains of fungi were detected from 36 burn patients during the investigated period, the incidence was 0.92% (36/3909). The most three commonest types among the identified 38 strains of fungi were Candida tropicalis (42.1%), Candida albicans (31.6%) and Candida famata (T. Famata, 10.5%). The drug sensitivity tests demonstrated that most of the strains detected in this investigation, with the exception of candida glabrata, were sensitive to most of the routine antimycotics agents such as Amphotericin B, Fluconazole, and Itraconazole etc. Among the 36 fungus positive patients, in 18 patients the burn area exceeded 80% TBSA, 12 patients with 50%-79% TBSA, 4 patients with 30%-49% TBSA, and in 2 patients the burn area was smaller than 30% TBSA. It was found most of the fungal infections (77.78%) occurred 2 weeks after burn injury, and 8 of the 36 fungus-infected patients died (the mortality was 22.22%). Conclusions Further examinations are necessary to confirm the diagnosis in burn patients suspected to have fungal infection. Once fungal infections are confirmed, antimycotic therapy must be started immediately.


Assuntos
Queimaduras/microbiologia , Micoses , Candida/isolamento & purificação , Humanos , Incidência , Testes de Sensibilidade Microbiana , Micoses/tratamento farmacológico , Micoses/patologia
14.
Clin Rheumatol ; 28(2): 191-9, 2009 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-18807103

RESUMO

There is mounting evidence indicating that the synovial fibroblasts (SFs) contribute to the pathogenesis of rheumatoid arthritis (RA). The present study showed the differential proteins expression pattern of SFs from patients with RA or osteoarthritis (OA) and healthy control. Cellular proteins of cultured SFs were subjected to 2-DE and visualized by silver nitrate staining. A total of 49 spots that were statistically and differentially overexpressed in RA or OA in comparison to healthy ones were identified by MALDI-TOF-MS, and 25 proteins were successfully identified. Western blot was used to further verify some of the differential proteins. These proteins included enzymatic and structural proteins, signal transduction proteins, calcium binding protein, etc. From all of the identified proteins, a number of proteins have been implicated that involved in the healthy or pathological SFs function (e.g., S100A4, S100A10, cathepsin D) or that have potential diagnostic and prognostic value for RA (alpha-enolase and TPI) or that may be the new therapeutic targets (Annexin, SOD, PRX).


Assuntos
Artrite Reumatoide/metabolismo , Fibroblastos/metabolismo , Osteoartrite/metabolismo , Proteoma/metabolismo , Membrana Sinovial/patologia , Anexina A2/metabolismo , Anexinas/metabolismo , Antígenos de Superfície/metabolismo , Artrite Reumatoide/patologia , Biópsia , Estudos de Casos e Controles , Catepsina D/metabolismo , Células Cultivadas , Fibroblastos/patologia , Proteínas de Ligação ao GTP/metabolismo , Humanos , Osteoartrite/patologia , Fosfopiruvato Hidratase/metabolismo , Proteômica/métodos , Proteína A4 de Ligação a Cálcio da Família S100 , Proteínas S100/metabolismo , Espectrometria de Massas por Ionização e Dessorção a Laser Assistida por Matriz
15.
Zhonghua Shao Shang Za Zhi ; 24(4): 248-50, 2008 Aug.
Artigo em Chinês | MEDLINE | ID: mdl-19102975

RESUMO

OBJECTIVE: To evaluate the application of the Third Military Medical University (TMMU) formula for fluid resuscitation on the major burn patients during shock stage. METHODS: Seventy-one thermal injury patients (burn area more than 30% TBSA, without especial illness, hospitalization within 8 hour after burn) admitted from 2005 to 2007 were divided into adult group (n = 46), child group (n = 25). Fluid resuscitation was initiated as per the TMMU formula. RESULTS: All patients survived the first 48 hours post burn injury and none developed recognized complications associated with fluid resuscitation. The average infused fluid was 16% approximately 38% more than the calculated in both adult and child groups. The average urine output during the first 24 hours post burn injury was 1.1 approximately 1.2 mL x kg(-1) x h(-1) in the two groups, but reached 1.2 mL and 1.7 mL x kg(-1) x h(-1) during the second 24 hours in adult and child groups respectively. CONCLUSION: TMMU formula for fluid resuscitation is a feasible option for major burn patients. Individual fluid resuscitation, guided by the physiological response, is also important and necessary.


Assuntos
Queimaduras/terapia , Hidratação/métodos , Choque/terapia , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Criança , Pré-Escolar , Feminino , Humanos , Lactente , Masculino , Pessoa de Meia-Idade , Adulto Jovem
16.
Zhonghua Shao Shang Za Zhi ; 24(2): 122-5, 2008 Apr.
Artigo em Chinês | MEDLINE | ID: mdl-18785413

RESUMO

OBJECTIVE: To observe the effects of autologous fat granules in mixed grafting microskin grafts on repair of extensive deep burn wounds in patients. METHODS: Twenty patients hospitalized in our ward were enrolled for autogenous self-control test in wounds on both or symmetrical parts of wounds of the trunk, and they were randomly divided into experimental (E) trol (C) groups, the wounds in E group were repaired with autologous fat granules together with microskin in mixed grafting (volume ratio 1 : 1), and in C group only autologous microskin grafting was given. Wound healing rate was measured on 30th, 45th, and 60th day after operation. Wound specimens harvested for HE staining and PCNA immunohistochemistry examination on 7th, 14th, 21st, and after operation. RESULTS: (1) The mean wound healing rate on 30th, 45th, and 60th day after E group was (56.3 +/- 3.1)%, (76.4 +/-6.1)%, (96.2 +/- 1.5)%, which were respectively higher C group [(28.3 +/-2.0)%, (47.3 +/-4.8)%, (85.4 +/- 2.2)%, P < 0.01]. HE staining showed epithelization in E group was earlier than that in C group, with regular arrangement of collagen fibers. The quantity NA positive cells in E group were larger than that in C group, and PCNA was mainly expressed cells of basal layer . CONCLUSION: Autologous fat granules in mixed grafting with autologous microskin promote wound healing.


Assuntos
Tecido Adiposo/transplante , Queimaduras/cirurgia , Transplante de Pele/métodos , Adulto , Feminino , Humanos , Masculino , Transplante Autólogo , Transplante Homólogo , Cicatrização
17.
Zhonghua Shao Shang Za Zhi ; 24(6): 437-40, 2008 Dec.
Artigo em Chinês | MEDLINE | ID: mdl-19149946

RESUMO

OBJECTIVE: To select the optimal pregnancy time window of embryonic pig skin precursor tissue for xenotransplantation and study its ability in wound repair. METHODS: Skin precursor tissues were obtained from pig fetus of fetal age of 35, 42, 56, 70 days, and were minced into microskin and transplanted to dorsal wounds of BALB/c nude mice, then they were covered with residual skin after plastic surgery of patients or adult pig skin (white). The characteristics of growth and development were observed after transplantation. Pathological examination was performed on 6 and 12 post operation weeks respectively to observe the tissue structure and tumorigenicity. RESULTS: Skin precursor tissues from fetal pig survived and developed after transplantation, and the microskin fused. New tissue area from skin precursor tissues with fetal age of 42 days was (47 +/- 6) mm2, which was higher than that of 35 days (18 +/- 8 mm2), 56 days (31 +/- 12 mm2), 70 days (20 +/- 8 mm2, P < 0.05). The skin precursor developed into "intact skin" with hair, sebaceous glands and sweat glands, and melanocytes were also detected in epidermis. The newly-grown skin tissue included epidermal and dermal layer, and obvious dermal papillae. Teratoma was not found after transplantation in skin precursor tissue with fetal age of 56, 70 days. CONCLUSION: Fetal pig skin precursor tissue with fetal age of 56 days can be used to repair wound as xenotransplantation.


Assuntos
Transplante de Tecido Fetal , Transplante de Pele , Transplante Heterólogo , Animais , Feto , Idade Gestacional , Camundongos , Camundongos Endogâmicos BALB C , Camundongos Nus , Suínos , Cicatrização
19.
Zhonghua Shao Shang Za Zhi ; 22(6): 411-4, 2006 Dec.
Artigo em Chinês | MEDLINE | ID: mdl-17438683

RESUMO

OBJECTIVE: To investigate the influence of various signal transduction modulators on the splenic T lymphocytes secretion of IL-2 and IL-10 in severely scalded mice, and to explore its mechanism. METHODS: The mice were inflicted with 18% TBSA full-thickness scald by high-pressure heat vapour, and T lymphocytes were isolated from murine splenocytes through nylon wool column at 12 and 96 post-scald hours (PSH). Then the cells were divided into following groups: i. e. control, scald, scald and modulator [1 ml of 50 micromol/L PKC inhibitor ( H-7) , 30 micromol/L tetradecanoylphorbol-13-acetate (TPA) , 10micromol/L nonreceptor tyrosine protein kinase inhibitor (herbimycin) , 25 microg/ml of mitogen activated protein kinase kinase inhibitor (PD098059) , 100 nmol/L Calcium ionophore ( A23187) were added to the cells, respectively] groups. The scald group was subdivided into S1 (with scald at 12 PSH) and S2 (with scald at 96 PSH) groups. The modulator group was subdivided into modulator, S1 and modulator( the modulators were added into cells at 12 PSH) , and S2 and modulator( the modulators were added to cells at 96 PSH) groups. The influence of modulators to T lymphocyte secretion of IL-2 and IL-10 were observed. RESULTS: After the addition of H-7, the IL-2 and IL-10 levels in each group were obviously lower than that in controls( P <0. 05 or 0.01) , and that in S1 and H7 group, S2 and H7 group were obviously lower than that in scald group at corresponding time-points( P <0.01). The levels of IL-10, and especially IL-2 were elevated by TPA, but they were markedly lower than that in control group after PD098059 pretreatment. The secretion of IL-2 and IL-10 was significantly suppressed by herbimycin in S1 and herbimycin, and S2 and herbimycin groups, but those in Sl and A21387[ (2 417+/-39) pg/ml, (2 793+/-25)pg/ml] , S2 and A21387 [ (921+/-50) pg/ml, (2 633+/-35)pg/ml] groups were evidently higher than those in S1[ (1 542+/-40)pg/ml, (2 390+/-15)pg/ml] , S2 [(328+/-19)pg/ml, (1 618+/-21)pg/ml,( P <0.05 or <0.01)]groups. CONCLUSION: PKC, calcium, MAPKK and TPK play critical roles in the dysfunction of splenic T lymphocyte secretion of IL-2 and IL-10 in severely scalded mice, among which TPK and PKC are mainly targeted to IL-2 secretion, and MAPKK is targeted to IL-10 secretion. TPA and A23187 can markedly rectify the disturbance of IL-2/IL-10 secretion ratio by increasing the IL-2 secretion after scald.


Assuntos
Queimaduras/metabolismo , Flavonoides/farmacologia , Transdução de Sinais , Linfócitos T/efeitos dos fármacos , Animais , Benzoquinonas/farmacologia , Calcimicina/farmacologia , Cálcio/metabolismo , Células Cultivadas , Feminino , Interleucina-10/metabolismo , Interleucina-2/metabolismo , Lactamas Macrocíclicas/farmacologia , Ativação Linfocitária , Masculino , Camundongos , Camundongos Endogâmicos , Quinases de Proteína Quinase Ativadas por Mitógeno/antagonistas & inibidores , Proteína Quinase C/metabolismo , Proteínas Tirosina Quinases/metabolismo , Rifabutina/análogos & derivados , Baço/citologia , Linfócitos T/metabolismo , Acetato de Tetradecanoilforbol/farmacologia
20.
Zhonghua Shao Shang Za Zhi ; 21(6): 401-4, 2005 Dec.
Artigo em Chinês | MEDLINE | ID: mdl-16480610
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