A prospective study on application of human umbilical cord mesenchymal stem cells combined with autologous Meek microskin transplantation in patients with extensive burns / 中华烧伤杂志

Objective: To investigate the effects of human umbilical cord mesenchymal stem cells (hUCMSCs) combined with autologous Meek microskin transplantation on patients with extensive burns. Methods: The prospective self-controlled study was conducted. From May 2019 to June 2022, 16 patients with extensive burns admitted to the 990th Hospital of PLA Joint Logistics Support Force met the inclusion criteria, while 3 patients were excluded according to the exclusion criteria, and 13 patients were finally selected, including 10 males and 3 females, aged 24-61 (42±13) years. A total of 20 trial areas (40 wounds, with area of 10 cm×10 cm in each wound) were selected. Two adjacent wounds in each trial area were divided into hUCMSC+gel group applied with hyaluronic acid gel containing hUCMSCs and gel only group applied with hyaluronic acid gel only according to the random number table, with 20 wounds in each group. Afterwards the wounds in two groups were transplanted with autologous Meek microskin grafts with an extension ratio of 1∶6. In 2, 3, and 4 weeks post operation, the wound healing was observed, the wound healing rate was calculated, and the wound healing time was recorded. The specimen of wound secretion was collected for microorganism culture if there was purulent secretion on the wound post operation. In 3, 6, and 12 months post operation, the scar hyperplasia in wound was assessed using the Vancouver scar scale (VSS). In 3 months post operation, the wound tissue was collected for hematoxylin-eosin (HE) staining to observe the morphological changes and for immunohistochemical staining to observe the positive expressions of Ki67 and vimentin and to count the number of positive cells. Data were statistically analyzed with paired samples t test and Bonferronni correction. Results: In 2, 3, and 4 weeks post operation, the wound healing rates in hUCMSC+gel group were (80±11)%, (84±12)%, and (92±9)%, respectively, which were significantly higher than (67±18)%, (74±21)%, and (84±16)% in gel only group (with t values of 4.01, 3.52, and 3.66, respectively, P<0.05). The wound healing time in hUCMSC+gel group was (31±11) d, which was significantly shorter than (36±13) d in gel only group (t=-3.68, P<0.05). The microbiological culture of the postoperative wound secretion specimens from the adjacent wounds in 2 groups was identical, with negative results in 4 trial areas and positive results in 16 trial areas. In 3, 6, and 12 months post operation, the VSS scores of wounds in gel only group were 7.8±1.9, 6.7±2.1, and 5.4±1.6, which were significantly higher than 6.8±1.8, 5.6±1.6, and 4.0±1.4 in hUCMSC+gel group, respectively (with t values of -4.79, -4.37, and -5.47, respectively, P<0.05). In 3 months post operation, HE staining showed an increase in epidermal layer thickness and epidermal crest in wound in hUCMSC+gel group compared with those in gel only group, and immunohistochemical staining showed a significant increase in the number of Ki67 positive cells in wound in hUCMSC+gel group compared with those in gel only group (t=4.39, P<0.05), with no statistically significant difference in the number of vimentin positive cells in wound between the 2 groups (P>0.05). Conclusions: The application of hyaluronic acid gel containing hUCMSCs to the wound is simple to perform and is therefore a preferable route. Topical application of hUCMSCs can promote healing of the autologous Meek microskin grafted area in patients with extensive burns, shorten wound healing time, and alleviate scar hyperplasia. The above effects may be related to the increased epidermal thickness and epidermal crest, and active cell proliferation.

Eleven-year operation analysis and optimized management of medical linear accelerator in some hospital / 医疗卫生装备

The Elekta Synergy Linear Accelerator in some hospital from 2012 to 2022 were retrospectively analyzed in terms of operation,failure time distribution and failure of each system.Some countermeasures were put forward accordingly to decrease the failure rate and strengthen the training of relevant personnel's operation and maintenance.References were provided for effective management and operation of medical linear accelerators.

Research Advances in the Diagnostic Value of Rapid On-site Evaluation in Endobronchial Ultrasound-guided Transbronchial Needle Aspiration for Lung Cancer / 中国医学科学院学报

Rapid on-site evaluation(ROSE),an auxiliary sampling quality evaluation technology,can be used to evaluate the adequacy and diagnostic category of samples,judge the histological type of lung cancer,and optimize the gene type of lung cancer.Applying ROSE to endobronchial ultrasound-guided transbronchial needle aspiration of suspected lung cancer can improve the puncture success rate and diagnostic rate and reduce complications and puncture attempts.Rose performed via remote cytopathology technology or by trained respiratory specialists may become the future trends.

Analysis of Clinical Characteristics of Acute B Lymphoblastic Leukemia with EP300-ZNF384 Fusion Gene Positive / 中国实验血液学杂志

OBJECTIVE@#To investigate the clinical manifestations and laboratory features of B-ALL patients with EP300-ZNF384 fusion gene positive, so as to improve the understanding of this subtype disease.@*METHODS@#The clinical data of 3 B-ALL patients with EP300-ZNF384 fusion gene positive admitted in Department of Hematology, the first medical center of Chinese PLA general hospital from February 2017 to February 2018 were collected and analyzed retrospectively. The clinical and laboratory characteristics as well as the therapentic outcome in B-ALL patients with EP300-ZNF384 fusion gene positive were analyzed.@*RESULTS@#The fusion gene of EP300-ZNF384 was detected in 8.1%(3/37) of B-ALL patients. All cases showed the normal karyotype and aberrant CD13 and/or CD33 expression for immunophenotype. 3 patients were sensitive to traditional chemotherapy.@*CONCLUSION@#The B-ALL with EEP300-ZNF384 fusion gene positive may be a subgroup of B-ALL with a uniqe clinical characteristis and laboatorial features. EP300-ZNF384 positive patients show a good response to conventional chemotherapy, suggesting a favorable prognosis.

Clinical Retrospective Analysis of Chronic Myeloid Leukemia in Myeloid Blast Crisis / 中国实验血液学杂志

OBJECTIVE@#To retrospectively analyze the clinical manifestation, laboratorial test features and prognosis of patients with CML in myeloid blast crisis.@*METHODS@#The clinical data of 10 patients with CML in myeloid blast crisis admitted in Chinese PLA General Hospital from June 2011 to May 2018 were collected, and their clinical features, laboratorial data and long-term survival were analyzed.@*RESULTS@#The median age of these 10 cases was 32.5 (23-73) years old. Nine cases had chronic phase history. The median chronic phase was 17(4-84) months. All the 10 cases had splenomegaly; B-ultrasonography showed that the median spleen size was 5.2 (4-7.8) cm in thickness, and 14.6 (11.4-19.8) in length. When chronic myeloid leukemia was in blast crisis, the median WBC count was 41.705（11.9-344.41）×10 /L and the median platelet count was 159 (13-2326) ×10 /L. The Ph+ chromosome and BCR-ABL1 fusion gene coulld be detected in all the cases. The chromosome karyotyping showed that additional chromosome abnormalities were found in 5 cases. One case was of low diploid, and two cases were with complex karyotype. ABL1 mutation was detected in 6 out of these 10 cases. ABL1 T315I mutation was detected in 2 of them and one was with deletion of combined P53 in genetic tests. The median follow-up time was 10.5(0.2-78) months. There were 5 cases treated sequentially by chemotheraphy with or without TKI and allo-HSCT. Three cases reached CP2 before transplantation. Among them, two cases still survived without progression for 67 months and 69 months after the transplantation respectively. One case died of transplantation-related mortality (suffered from cerebral hemorrhage 7 months after the transplantation). Two cases were NR before the transplantation, and both died of disease relapse or progression at the time points of one or three months after the transplantation. Five cases treated by TKI ± chemotheraphy and without HSCT succumbed to disease progression. The median time was 6(0.2-22) months.@*CONCLUSION@#CML patients in myeloid blast crisis treated by chemotheraphy combined with TKI gain CP2, the survival time of patients treated by sequential allo-HSCT is prolonged.

The CXCL12 (SDF-1)/CXCR4 chemokine axis: Oncogenic properties, molecular targeting, and synthetic and natural product CXCR4 inhibitors for cancer therapy / 中国天然药物

Chemokine 12 (CXCL12), also known as stromal cell derived factor-1 (SDF-1) and a member of the CXC chemokine subfamily, is ubiquitously expressed in many tissues and cell types. It interacts specifically with the ligand for the transmembrane G protein-coupled receptors CXCR4 and CXCR7. The CXCL12/CXCR4 axis takes part in a series of physiological, biochemical, and pathological process, such as inflammation and leukocyte trafficking, cancer-induced bone pain, and postsurgical pain, and also is a key factor in the cross-talking between tumor cells and their microenvironment. Aberrant overexpression of CXCR4 is critical for tumor survival, proliferation, angiogenesis, homing and metastasis. In this review, we summarized the role of CXCL12/CXCR4 in cancer, CXCR4 inhibitors under clinical study, and natural product CXCR4 antagonists. In conclusion, the CXCL12/CXCR4 signaling is important for tumor development and targeting the pathway might represent an effective approach to developing novel therapy in cancer treatment.

miR-7 inhibits activation of astrocytes derived from rats via silencing of EGFR / 中国药理学通报

Aim To explore the effects of miR-7 on astrocyte activation and the underlying mechanisms. Methods Following isolation and culturing, astro-cytes extracted from rat cortex were treated with culture solution (control group), ciliary neurotrophic factor (CNTF, an agonist of astrocyte activation), miR-7 mimic+CNTF, miR-7 mimic control+CNTF, miR-7 inhibitor+CNTF and miR-7 inhibitor control+CNTF, respectively. Quantitative real-time polymerase chain reaction (qRT-PCR) was used to detect the mRNA ex-pression of glial fibrillary acidic protein (GFAP) and epidermal growth factor receptor(EGFR). The protein expression of GFAP, EGFR, signal transducers and activators of transcription 3(STAT3) and phosphoryla-ted STAT3 (p-STAT3) was measured using Western blot. Wild type pGL3-EGFR and mutant pGL3-EGFR-m recombinant plasmids were constructed and then co-transfected with miR-7 mimic into HEK293T cells,re-spectively. The luciferase activity of reporter gene was measured. In addition,astrocytes were treated with ei-ther EGFR siRNA or S31-201 (an inhibitor of STAT3),followed by the incubation with miR-7 inhib-itor and CNTF. Both qRT-PCR and Western blot were subsequently used to detect the mRNA and protein lev-els of GFAP. Results The expression levels of GFAP and EGFR as well as p-STAT3/STAT3 ratio in CNTF group were higher than those in control group (P <0.01). When compared with CNTF group,GFAP and EGFR levels and p-STAT3/STAT3 ratio significantly decreased in miR-7 mimic+CNTF group but increased in miR-7 inhibitor+CNTF group(P<0.01). In com-parison with control group, transfection with miR-7 mimic markedly reduced the luciferase activity of wild type EGFR (P <0.01). Moreover, miR-7 inhibitor-induced up-regulation of GFAP expression was almost completely reversed by either EGFR siRNA or S31-201 pretreatment (P<0.01). Conclusion miR-7 antag-onizes the activation of astrocytes from rats by inhibi-ting the EGFR/STAT3 signaling pathway.

The CXCL12 (SDF-1)/CXCR4 chemokine axis: Oncogenic properties, molecular targeting, and synthetic and natural product CXCR4 inhibitors for cancer therapy / 中国天然药物

Chemokine 12 (CXCL12), also known as stromal cell derived factor-1 (SDF-1) and a member of the CXC chemokine subfamily, is ubiquitously expressed in many tissues and cell types. It interacts specifically with the ligand for the transmembrane G protein-coupled receptors CXCR4 and CXCR7. The CXCL12/CXCR4 axis takes part in a series of physiological, biochemical, and pathological process, such as inflammation and leukocyte trafficking, cancer-induced bone pain, and postsurgical pain, and also is a key factor in the cross-talking between tumor cells and their microenvironment. Aberrant overexpression of CXCR4 is critical for tumor survival, proliferation, angiogenesis, homing and metastasis. In this review, we summarized the role of CXCL12/CXCR4 in cancer, CXCR4 inhibitors under clinical study, and natural product CXCR4 antagonists. In conclusion, the CXCL12/CXCR4 signaling is important for tumor development and targeting the pathway might represent an effective approach to developing novel therapy in cancer treatment.

Retrospective Study of Ph/BCR-ABLAcute Myelogenous Leukemia / 中国实验血液学杂志

<p><b>OBJECTIVE</b>To investigate the clinical manifestation, features of laboratorial examination results and prognosis of patients with Ph/BCR-ABLacute myelogenous leukemia(AML).</p><p><b>METHODS</b>The clinical data of 5 AML patients with Ph/BCR-ABLadmitted in Department of Hematology of Chinese PLA general hospital from July 2007 to May 2015 were collected and their clinical characteristics, laboatorial examination results and long-term survival were analyzed.</p><p><b>RESULTS</b>The median age of 5 cases was 39 years old, and 2 cases with splenomegaly. All the cases were assayed for BCR-ABL fusion gene, and 2 of them were accompanied with other molecular abnormalities. In 4 cases, Ph chromosome was not found in one case, and one was with complex karyotype. 3 cases still are live till now and are treated by traditional chemotherapy combined with TKI, and consolidated by allo-HSCT. One case treated by traditional chemotherapy survived for 6 months. And one case treated by traditional chemotherapy combined with TKI survives till to now.</p><p><b>CONCLUSION</b>The survival time of Ph/BCR-ABLacute myelogenous leukemia is improved by the traditional chemotherapy combined with TKI and the consolidation with allo-HSCT.</p>

Efficacy of Idarubicin-Based Stratified Therapy for Acute Promyelocytic Leukemia / 中国实验血液学杂志

<p><b>OBJECTIVE</b>To investigate the remission rate of all-transretinoic acid (ATRA) combined with arsenics acid(ATO) on acute promyelocytic leukemia, and the efficacy and safety of sequential consolidation therapy with idarubicin, all-trans retinoic acid and arsenic trioxide/compound Huangdai tablet.</p><p><b>METHODS</b>Between January 2011 and January 2016 years 22 patients with newly diagnosed acute promyelocytic leukemia who received ATRA combined with ATO till complete remission in our hospital were retrospectively analyzed. Rates of CR, early mortality, complications and duration of induction were analyzed. The low/intermediate risk patients received 1-2 courses of idarubicin (IDA) single-agent chemotherapy, ATRA and compound Huangdai tablet /ATO alternative treatment of 4 cycles after complete remission; the high-risk patients received idarubicin and cytarabine chemotherapy, ATRA and compound Huangdai tablet /ATO alternative treatment of a total of 4 cycles for double-induction group.</p><p><b>RESULTS</b>Double-induction achieved a 100% CR rates after 28.23±1.6 days induction. During induction, the infection rate was 50%, 36.4% of patients had differentiation syndrome and 27.3% suffered from bleeding in different locations. The 5-year overall survival was 100% and relapse-free survival was 95.4%.</p><p><b>CONCLUSION</b>This protocol has a good antileukemic effect. The combination of ATRA and ATO achieves extremely high complete reminssion rate and reduces coagulopathy to cut down early mortality. Sequential therapy with IDA, ATRA, and ATO as a consolidation regimen results in satisfactory clinical outcomes with tolerable side effects.</p>

Contralateral C7 Nerve Root Transfer for Function Recovery in Adults: A Meta-analysis / 中华医学杂志(英文版)

<p><b>BACKGROUND</b>Root avulsion to all 5 roots of the brachial plexus is a common presentation and keeps a major reconstructive challenge. The contralateral C7 (CC7) nerve transfer has been used in treating brachial plexus avulsion injury (BPAI) since 1986. However, the effectiveness of the procedure remains a subject of controversy. The aim of this meta-analysis was to study surgical outcomes regarding motor and sensory recovery after CC7 nerve transfer.</p><p><b>METHODS</b>Chinese or English (i.e., "contralateral c-7", "contralateral c7", "c7 nerve root", and "seventh cervical nerve root") keywords were used for a literature search for articles related to CC7 nerve transfer in several databases (i.e., PubMed, Cochrane, Embase, CNKI, CQVIP, and Wanfang Data). Clinical research articles were screened, and animal studies as well as duplicate publications were excluded. Muscle strength and sensory recovery were considered to be effective only when the scores on the United Kingdom Medical Research Council scale were equal to or higher than M3 and S3, respectively.</p><p><b>RESULTS</b>The overall ipsilateral recipient nerve recovery rates were as follows: the efficiency rate for muscle strength recovery after CC7 nerve transfer was 0.57 (95% confidence interval [CI]: 0.48-0.66) and for sensory recovery was 0.52 (95% CI: 0.46-0.58). When the recipient nerve was the median nerve, the efficiency rate for muscle strength recovery was 0.50 (95% CI: 0.39-0.61) and for sensory was 0.56 (95% CI: 0.50-0.63). When the recipient nerve was the musculocutaneous nerve and the radial nerve, the efficiency rate for muscle strength recovery was 0.74 (95% CI: 0.65-0.82) and 0.50 (95% CI: 0.31-0.70), respectively.</p><p><b>CONCLUSIONS</b>Transfer of CC7 nerves to musculocutaneous nerves leads to the best results. CC7 is a reliable donor nerve, which can be safely used for upper limb function reconstruction, especially for entirely BPAI. When modifying procedures, musculocutaneous nerves and median nerve can be combined as recipient nerves.</p>

Regulatory Role of Nitric Oxide in Development and Hatching of Mouse Blastocysts / 中国医学科学院学报

<p><b>OBJECTIVE</b>To determine the regulatory role and mechanism of nitric oxide (NO) in the development and hatching of mouse blastocysts.</p><p><b>METHODS</b>The Kunming female mice were superovulated and then mated with mature male mice. On the day 2.5 of their pregnancy, morulae were flushed from their uterine horns with culture media. Morulae were cultured in different concentrations of N-nitro-L arginine methyl ester (L-NAME), sodium nitroprusside (SNP), or the combination of L-NAME and SNP in culture media for 48 hours. The development and hatching of blastocysts were examined on day 4 and day 5 and the total numbers of blastocyst cells and cysteinyl aspartate specific proteinase 3 (caspase 3) were observed under confocal laser scanning microscope.</p><p><b>RESULTS</b>With the increase of the concentration of L-NAME or SNP, the hatching rate of blastocysts and the total number of blastocyst cells were significantly reduced. The addition of 10 nmol/L SNP in culture media with 5 mmol/L L-NAME significantly increased the development of blastocysts and promoted hatching of blastocysts. However, with increase of SNP concentration in culture media with 5 mmol/L L-NAME, the development and hatching rates of blastocysts were significantly decreased. L-NAME had no obvious effect on the expression of active caspase 3 in blastocyst cells. However,when being above 500 nmol/L,SNP significantly increased the expression of caspase 3 in blastocyst cells.</p><p><b>CONCLUSIONS</b>NO plays an important role in development and hatching of mouse blastocysts. Excessively high or low NO can damage the division of blastomeres, resulting in the failure of the blastocyst development and hatching. Also, excessively high NO can lead to the apoptosis of the blastocyst cells.</p>

Analysis of prognosis in acute myeloid leukemia treated with allogeneic hematopoietic stem cell transplantation / 中国实验血液学杂志

<p><b>OBJECTIVE</b>The study was to investigate the prognosis factors in acute myeloid leukemia (AML) patients treated with allogeneic hematopoietic stem cell transplantation (allo-HSCT).</p><p><b>METHODS</b>The clinical information of 60 patients in our hospital was retrospectively analyzed and the prognosis factors of survival and relapse were explored by COX's proportional hazard model.</p><p><b>RESULTS</b>The elderly (HR = 4.530, P = 0.012), cGVHD (HR = 0.023, P = 0.003) and infection fungal disease (IFD) (HR = 4.019, P = 0.017) were influence factors for 2 year cumulative overall survival (OS). Response status (high risk vs low risk: HR = 3.465, P = 0.028), preconditioning regimens (TBI/Cy vs Bu/Cy: HR = 0.071, P = 0.012; FB vs Bu/Cy: HR = 7.547, P = 0.025) and cGVHD (HR = 0.088, P = 0.004) were influence factors for 2 year cumulative relapse rate (RR). cGVHD (P = 0.017) and IFD (P = 0.000) had an effect on OS after 2 years since allo-HSCT.</p><p><b>CONCLUSION</b>Age, response status, preconditioning regimens, cGVHD and IFD are closely associated with the prognosis of AML patients treated with allo-HSCT, and different patients need the individualized treatment.</p>

Anti-atherosclerosis role of N-oleoylethanolamine in CB2 / 药学学报

To observe a PPAR-alpha agonist effect of N-oleoylethanolamine (OEA) on CB2 (cannabinoid receptor 2), an anti-inflammatory receptor in vascular endothelial cell, healthy HUVECs and TNF-alpha induced HUVECs were used to establish a human vascular endothelial cell inflammatory model. Different doses of OEA (10, 50 and 100 micromol x L(-1)) had been given to HUVECs, cultured at 37 degrees C for 7 h and then collected the total protein and total mRNA. CB2 protein expression was detected by Western blotting and CB2 mRNA expression was assayed by real-time PCR. As the results shown, OEA (10 and 50 micromol x L(-1)) could induce the CB2 protein and mRNA expression, but not 100 micromol x L(-1). To detect if anti-inflammation effect of OEA is partly through CB2, CB2 inhibitor AM630 was used to inhibit HUVEC CB2 expression, then the VCAM-1 expression induced by TNF-alpha was detected, or THP-1 adhere to TNF-alpha induced HUVECs was examined. OEA (50 micromol x L(-1)) could inhibit TNF-alpha induced VCAM-1 expression and THP-1 adhere to HUVECs, these effects could be partly inhibited by a CB2 inhibitor AM630. The anti-inflammation effect of OEA is induced by PPAR-alpha and CB2, suggesting that CB2 signaling could be a target for anti-atherosclerosis, OEA have wide effect in anti-inflammation, it may have better therapeutic potential in anti-inflammation in HUVECs, thus achieving anti-atherosclerosis effect.

Prevalence of self-reported allergy, food hypersensitivity and food intolerance and their influencing factors in 0-36 months old infants in 8 cities in China / 中华儿科杂志

<p><b>OBJECTIVE</b>To measure the prevalence, the possible causes and the influencing factors of allergy, food hypersensitivity and food intolerance in 0-36 month old infants in 8 cities in China.</p><p><b>METHOD</b>Totally 2632 infants from the outpatient departments of prevention and health care of two representative hospitals in 8 Chinese cities were randomly selected by applying multistage cluster sampling method from October 2011 to March 2012, and a one-on-one survey to infants' parents was conducted to investigate infants' sensitization status.</p><p><b>RESULT</b>Self-reported infant allergy rate was 17.97% (473/2632) ; self-reported food hypersensitivity and food intolerance rates were 6.53% (172/2632) and 4.26% (112/2632) , respectively. The proportion of self-reported food hypersensitivity of 0-12 months old infants was 4.47% (74/1656) and their top five allergens in a descending order were eggs (28.38%) , shrimp (25.68%) , fish (21.62%) , milk (18.92%) and wheat (4.05%) . The proportion of self-reported 13-36 months old infant's food hypersensitivity was 10.05% (98/976) . The top five allergens were shrimp (33.93%) , fish (26.79%) , eggs (23.21%) , milk (12.50%) and soy (3.57%) in 13-24 months group, while fish (38.24%) , shrimp (35.29%) , eggs (20.59%) , milk (20.59%) and peanuts (2.94%) in 25-36 months group. Both 7-12 and 13-24 month old were the highest incidence (both of them were 11.98%, 58/484) of age for developing food hypersensitivity and 7-12-month old was also the highest incidence (8.47%, 41/484) of age for food intolerance. The self-reported food intolerance rate was 3.68% (61/1656) and 5.23% (51/976) in the two age groups, respectively. Age, parental history of allergy and father's educational level (OR was 2.452, 1.482 and 2.598, respectively, P < 0.01) were the risk factors of food hypersensitivity; within two weeks of sickness (OR = 1.267, P < 0.05) was the risk factor of food intolerance.</p><p><b>CONCLUSION</b>Infancy was the most vulnerable period of life of getting allergy, therefore, it is necessary for all infants to prevent allergy through a variety of effective strategies.</p>

Influence of age on median lethal burn area of burn patients / 中华烧伤杂志

<p><b>OBJECTIVE</b>To discuss the influence of age on the LA50 (the burn area lethal to 50% of patients) of burn patients.</p><p><b>METHODS</b>(1) Twenty-three thousand and seventy-three burn patients hospitalized in our center from December 1958 to December 2004 were enrolled, and they were divided into 25 age groups. LA50 values of total and full-thickness burn areas of patients in each age group were computed with probit regression method with Probit analysis of SPSS 11.0. (2) Those age groups with similar LA50 values were merged into one age group; thus 4 new age groups were formed. LA50 and its 95% confidence interval (CI) of total and full-thickness burn areas of patients in each age group were computed respectively. (3) All the patients were divided into group A (admitted from 1 December 1958 to 31 December 1983) and group B (admitted from 1 January 1984 to 31 December 2004) according to the admission time. LA50 and its 95% CI of total and full-thickness burn areas of patients in each age group of groups A and B were computed respectively.</p><p><b>RESULTS</b>(1) LA50 values of total and full-thickness burn areas of patients among the 25 age groups were low in age groups younger than or equal to 5 years, which increased in age groups older than 5 years, distinctly higher in age groups older than 15 years, and they became lower in age groups older than 60 years. (2) LA50 values of total and full-thickness burn areas of patients in the 4 merged age groups were lowest in age groups older than 60 years (50.90% TBSA) and younger than or equal to 5 years (35.81% TBSA), and highest in age group older than 15 years and younger than or equal to 60 years (89.38% and 59.22% TBSA). There were statistically significant differences in LA50 of total and full-thickness burn areas of patients among 4 merged age groups [with 95% CI values of LA50 of total burn areas of patients in age groups ranging from young to old respectively (56.87 to 64.69)%, (64.46 to 74.36)%, (85.89 to 93.37)%, (44.55 to 60.73)% TBSA; with 95% CI values of LA50 of full-thickness burn areas of patients in age groups from young to old respectively (32.67 to 39.69)%, (40.86 to 50.41)%, (55.27 to 63.85)%, (32.46 to 54.86)% TBSA]. (3) LA50 values of total and full-thickness burn areas of patients in group B (98.94% and 73.23% TBSA) were significantly higher than those in group A (69.61% and 39.79% TBSA). There were differences in LA50 values of patients among different age groups in both group A and group B. The variation trend of LA50 values of patients among the 4 age groups in groups A and B was almost the same. Except for LA50 of total burn areas of patients in age group older than 5 years and younger than or equal to 15 years and LA50 of full-thickness burn areas of patients in age group older than 60 years, there were statistically significant differences in the LA50 of total and full-thickness burn areas of the other patients between group A and group B [with 95% CI of LA50 of total burn areas of patients of younger than or equal to 5 years, older than 15 years and younger than or equal to 60 years, and older than 60 years respectively (48.38 to 56.07)% and (68.68 to 81.35)% TBSA, (75.91 to 84.89)% and (97.09 to 110.45)% TBSA, (30.08 to 45.08)% and (60.67 to 102.69)% TBSA; with 95% CI of LA50 of full-thickness burn areas of patients of younger than or equal to 5 years, older than 5 years and younger than or equal to 15 years, older than 15 years and younger than or equal to 60 years respectively (27.48 to 34.69)% and (42.09 to 54.03)% TBSA, (34.78 to 46.43)% and (49.62 to 69.47)% TBSA, (43.98 to 51.77)% and (66.43 to 77.99)% TBSA].</p><p><b>CONCLUSIONS</b>Age is one of the important factors that influence the LA50 of burn patients. LA50 in different age groups increases with the development of medical technology; however, the influence of age on LA50 is not visibly changed by the advance of treatment.</p>

Congenital symbrachydactyly: outcomes of surgical treatment in 120 webs / 中华医学杂志(英文版)

<p><b>BACKGROUND</b>Symbrachydactyly is defined as a combination of short fingers with syndactyly. There are few published reports estimating the incidence of symbrachydactyly. The aim of this study was to investigate the clinical features and the outcome of surgical treatment for congenital symbrachydactyly.</p><p><b>METHODS</b>One hundred and twenty webs of thirty-four patients of symbrachydactyly were involved in the study. The sex ratio was 21 males/13 females. The age ranged from 1 year to 8 years, average 2.6 years. Four cases had both hands involved and 30 patients had one hand involvement. Release of the syndactylous digits webs were completed by one surgical procedure in 14 cases and more than one surgical procedure in 20 cases; 3 to 6 months between the procedures. In the meantime, some of the associated hand deformities were treated.</p><p><b>RESULTS</b>Postoperative follow-up time was 10 to 18 months, average 12 months. All the fingers involved in this study were separated successfully. However, 6 fingers had scar tissue contracture and 8 had web scar adhesion. All complications needed further surgical treatment. Parents of 94.1% of the patients were satisfied with the overall function of the hand, and 76.5% were satisfied with the cosmetic appearance of hand.</p><p><b>CONCLUSIONS</b>The combination of syndactyly and brachydactyly is the main clinical feature in symbrachydactyly. Separation of the digital webs can greatly improve the function of the hand. However, more work needs to be done to improve the cosmetic appearance of the hand.</p>

Localization and expression of Slingshot-1L in peripheral eosinophils from patients with acute asthma exacerbation / 南方医科大学学报

<p><b>OBJECTIVE</b>Eosinophils play a pivotal role in asthmatic airway inflammation. We previously found a significantly high expression of Slingshot-1L (SSH-1L) in peripheral eosinophils in acute exacerbations of asthma. Objective To investigate the expression and localization patterns of SSH-1L in peripheral blood eosinophils of asthmatic patients and their changes after treatment with inhaled corticosteroids.</p><p><b>METHODS</b>We recruited 4 outpatients with acute exacerbations of asthma who received no previous corticosteroid treatment and 1 healthy volunteer. From all the subjects 30 ml peripheral venous blood samples were collected before and after a 3-month treatment with inhaled fluticasone. The eosinophils were isolated, purified and counted, and the expressions of SSH-1L in the eosinophils were examined by RT-PCR and Western blotting. The localization of SSH-1L phosphatases in the peripheral eosinophils was detected by immunofluorescence assay in one patient.</p><p><b>RESULTS</b>SSH-1L phosphatases distributed diffusely in the cytoplasm, especially dense near the membrane of the peripheral eosinophils. Glucocorticoids treatment resulted in a significant reduction in both the SSH-1L mRNA expression (0.7403∓0.1124 vs 0.4101∓0.0363, P=0.001) and SSH-1L protein expression (0.3410∓0.1337 vs 0.1543∓0.0551, P=0.039).</p><p><b>CONCLUSION</b>A high expression of SSH-1L in peripheral eosinophils in acute exacerbations of asthma may play a role in the activation and migration of eosinophils. The efficacy of inhaled corticosteroids in asthma control might be partly attributed to a down-regulated expression of SSH-1L.</p>

Effect of toluene diisocyanate on reactive oxygen species production and permeability of human bronchial epithelial cells in vitro / 南方医科大学学报

<p><b>OBJECTIVE</b>To investigate the effect of toluene diisocyanate (TDI) on the production of reactive oxygen species (ROS) and the permeability of human bronchial epithelial (HBE) cells.</p><p><b>METHODS</b>TDI-human serum albumin (TDI-HSA) conjugate was prepared using a modified Son's method. MTT assay was used to assess HBE cell viability after exposure to different concentrations of TDI-HSA. The level of intracellular ROS of HBE cells was detected by flow cytometry with an oxidation-sensitive fluorescent probe 2',7'-dichlorofluorescein diacetate (DCFH-DA) uploading, and the permeability of cell monolayer was assessed by detecting the transepithelial electrical resistance (TEER).</p><p><b>RESULTS</b>The exposure to 120 µg/ml TDI-HSA did not obviously affect the cell viability. Compared with the control group, the intracellular fluorescent intensity increased significantly in the cells exposed to 20, 60, and 100 µg/ml TDI-HSA (P<0.05). The intracellular ROS production increased significantly after 100 µg/ml TDI-HSA treatment (P<0.05), but the increment in ROS production was significantly suppressed by pretreatment of the cells with N-acetylcysteine (NAC) (P<0.05), which also enhanced the TEER decreased by TDI-HSA treatment (P<0.05).</p><p><b>CONCLUSIONS</b>TDI enhances the permeability of HBE cell monolayer partially through a ROS-mediated pathway, suggesting the importance of oxidative stress in TDI-induced pulmonary diseases.</p>

Monitoring results of iodized salt of Zhangjiakou city in Hebei province during 2001-2009 / 中国地方病学杂志

Objective To analyze comprehensively the monitoring data of iodized salt in Zhangjiakou city during 2001 to 2009, and to provide basic information for working out control strategies of the iodine deficiency disorders. Methods According to the iodized salt monitoring requirements in National Iodine Deficiency Disorders Monitoring Program of Ministry of Health, a batch of nine salt samples were taken from each processing (wholesale)company of each county or district of the seventeen counties(districts) of Zhangjiakou once a month. Two townships (towns, street offices) were selected by their location of east, south, west and north in each county(district), and a township in central area each year. Four villages(neighborhoods) were selected in each township(town, street office),and eight household salt samples were collected in each village(neighborhood), and quantitatively determined by direct titration of iodine. Results Iodized salt processing(wholesale) : during 2001 to 2009, a total of 1728 batches was monitored, 1689 batch qualified, batch qualification rate 97.74%;15552 salt samples were tested, 15 357 qualified, iodized salt qualification rate 98.75 %. Household salt levels : 5297 villages (neighborhoods) of 1305 townships(towns, street offices) were monitored, 44 316 salt samples were collected, 43 274 qualified, iodized salt qualification rate 98.04%(43 274/44 141 ), iodized salt coverage rate 99.61%(44 141/44 316), qualified iodized salt consumption rate 97.65%(43 274/44 316). Rate of non-iodized salt was 0.40%(260/44 316), and salt median iodine was 30.02 mg/kg. Conclusions The iodized salt quality indicators are within the state-controlled range in Zhangjiakou city for nine years which remaines at relatively stable levels with a smaller range of annual fluctuations.Detection of non-iodized salt over the years has become the main factors affecting the effectiveness of the prevention and control measures.We should increase monitoring,supervision,and universal health education,and prevent the spread of non-iodized salt.