Objective To evaluate the effect of human umbilical cord mesenchymal stem cells (hUCMSCs) treatment through intramuscular administration on the heart function and angiogenesis of the myocardium in dilated car-diomyopathy (DCM)rats induced by Adriamycin(ADR). Methods One hundred male SD rats were randomly divided into the normal group and the DCM group. Rats in the DCM group were treated with ADR by intraperitoneal injection of 2. 0 mg/ kg dose per week for 8 weeks in order to induce DCM. Sixty modeled surviving rats with DCM were randomly divided equally into 3 groups,and they were treated with hUCMSCs or DMEM by intramuscular injection. Rats in the DMEM group (20 cases)received intramuscular infusion 2 mL DMEM alone;rats in the low - dose group (20 cases) underwent intramuscular infusion of 1 × 106 hUCMSCs/ 2 mL in DMEM;rats in the high dose group (20 cases)under-went intramuscular infusion of 10 × 106 hUCMSCs/ 2 mL in DMEM. Echocardiography and plasma brain natriuretic pep-tide(BNP)were used to assess cardiac function in modeled rats. The morphological changes in myocardial cells were observed by using HE and Masson staining after ADR injection stopped for one week. Four weeks after administration of hUCMSCs,echocardiography was performed to evaluate the cardiac function,and plasma BNP level was detected by en-zyme immunoassay kit. Western blot was used to analyze the expression of vascular endothelial growth factor(VEGF)in myocardium of rats in each group. Myocardial microvessel density was detected by using anti - CD34 monoclonal antibody and transmission electron microscopy (TEM)were performed to observe the ultrastructure of microvessel. Results Left ventricular ejection (LVEF)and left ventricular fractional shortening (LVFS)in the DCM groups [(66. 17 ± 3. 54)％,(31. 33 ± 3. 20)％]were significantly decreased compared to those in the normal group [(77. 25 ± 3. 40)％,(41. 00 ± 2. 94)％],and the differences were statistically significant(t = 10. 620,10. 328,all P < 0. 05);the morphological changes in myocardial cells was observed by using HE and Masson staining. Pit - induced typical his-tological lesion of myocardial tissue was observed in the DCM group,such as congestion,edema,a disorganization of myocytes and focal necrosis and myocardial tissue with wispy,broad collagen fibers predominating in the matrix. Four weeks after administration of hUCMSCs,LVEF in the low dose group or the high dose group were significantly higher compared with those in the DMEM group[(72. 27 ± 2. 44)％ or (70. 92 ± 2. 68)％ vs. (62. 89 ± 2. 54)％],and the differences were statistically significant(t = 2. 145,2. 131,all P < 0. 05);and LVFS were significantly higher compared with that in the DMEM group [(34. 96 ± 2. 08)％ or (33. 49 ± 2. 19)％ vs. (30. 98 ± 2. 22)％],and the differences were statistically significant (t = 2. 491,4. 086,all P < 0. 05). The plasma level of BNP was significantly declined in the hUCMSCs treated rats as compared to those before treatment [low dose group (352. 68 ± 41. 25)ng/ L vs. (202. 68 ± 20. 38)ng/ L,t = 2. 052,P < 0. 05;high dose group (355. 79 ± 48. 32)ng/ L vs. (193. 62 ± 15. 41)ng/ L,t = 2. 074,P < 0. 05]. Quantitative analysis demonstrated that microvessel density was significantly hi-gher in low - dose and high - dose hUCMSCs treated DCM rats than that in the DMEM treated DCM rats [(84. 00 ± 19. 18)/ mm2 or (86. 67 ± 20. 88)/ mm2 vs. (27. 14 ± 13. 97)/ mm2 ,t = 2. 109,2. 101,all P < 0. 05];Western blot test showed that there had high expression of VEGF in myocardium and TEM in the high dose group,and vessel injury in DMEM treated rats were more serious than that of hUCMSCs treated rats. Conclusion It suggests that hUCMSCs in-tramuscular injection may improve heart function and angiogenesis of myocardium in DCM rats induced by adriamycin.

OBJECTIVE: To Study the clinical features of congenital microtia and atresia . To evaluate the methods and results of the same microtia surgery, ear canal and middle ear reconstruction. METHOD: Statistically analysis of the data of the hospitalization microtia 62 ears of 58 cases of patient in our department from January 2005 to October 2010 waw conducted. These patients with congenital ear malformations are associated with aural atresia, ossicular chain abnormalities, severe conduction Deafness. All patients received preoperative temporal bone CT examination and reconstruction, hearing examination. Operation was given in two phases, first operation aim to form a line of ear, ear canal reconstruction, ear reconstruction, the second one aim to line of ear skin graft, cranial angle of the ear reconstruction. The preoperative and postoperative data were retrospectively analyzed. RESULT: The auricle plus external auditory canal, middle ear reconstruction came out with a good shape of the ear and the ear canal in close proximity to the normal population. Most patients' hearing were improved after surgery. CONCLUSION Surgeries of patients with congenital ear malformations and aural atresia should be carefully designed according to the three-dimensional reconstruction of multislice spiral CT reconstruction, which can provide information about surgery approach and middle ear abnormality. The whole ear shape and hearing ear after reconstruction are improved after the surgery.
Adolescent ; Angioplasty ; Congenital Microtia ; surgery ; Ear ; Ear Auricle ; abnormalities ; surgery ; Ear Canal ; abnormalities ; surgery ; Ear, External ; abnormalities ; surgery ; Hearing ; Hearing Loss ; surgery ; Humans ; Reconstructive Surgical Procedures ; methods ; Retrospective Studies ; Skin Transplantation ; Tomography, X-Ray Computed

Purpose: This study aimed to investigate the changes in microRNA-130a (miR-130a) and its correlation with cardiotoxicity during epirubicin/cyclophosphamide followed by docetaxel plus trastuzumab (EC-D+T) adjuvant chemotherapy in human epidermal growth factor receptor-2-positive (HER2+) breast cancer patients. Methods: A total of 72 HER2+ breast cancer patients who underwent resection and were scheduled to receive EC-D+T adjuvant therapy were consecutively enrolled. The expression of miR-130a and cardiotoxicity (defined as any of the following situations: 1) absolute decline of left ventricular ejection fraction (LVEF) ≥ 10% and LVEF < 53%; 2) heart failure; 3) acute coronary artery syndromes; and 4) fatal arrhythmia) were assessed every 3 months throughout the 15-month EC-D+T treatment. Results: The accumulating cardiotoxicity rate was 12 (16.7%), of which the incidence of heart failure, acute coronary syndrome, life-threatening arrhythmias, ΔLVEF ≥ 10%, and LVEF < 53% was 0 (0.0%), 1 (1.4%), 0 (0.0%), and 12 (16.7%), respectively. Baseline miR-130a expression was negatively correlated with LVEF (%) and positively correlated with cardiac troponin I. The expression of miR-130a gradually increased in both cardiotoxicity and noncardiotoxicity patients during EC-D+T treatment, while the increment of miR-130a was more obvious in cardiotoxicity patients compared with non-cardiotoxicity patients. Further logistic regression and receiver operating characteristic curve analysis indicated that miR-130a was an independent predictive factor for increased cardiotoxicity risk. Conclusion MiR-130a increases constantly and predicts high cardiotoxicity risk during ECD+T adjuvant chemotherapy in HER2+ breast cancer patients.

Purpose: This study aimed to investigate the changes in microRNA-130a (miR-130a) and its correlation with cardiotoxicity during epirubicin/cyclophosphamide followed by docetaxel plus trastuzumab (EC-D+T) adjuvant chemotherapy in human epidermal growth factor receptor-2-positive (HER2+) breast cancer patients. Methods: A total of 72 HER2+ breast cancer patients who underwent resection and were scheduled to receive EC-D+T adjuvant therapy were consecutively enrolled. The expression of miR-130a and cardiotoxicity (defined as any of the following situations: 1) absolute decline of left ventricular ejection fraction (LVEF) ≥ 10% and LVEF < 53%; 2) heart failure; 3) acute coronary artery syndromes; and 4) fatal arrhythmia) were assessed every 3 months throughout the 15-month EC-D+T treatment. Results: The accumulating cardiotoxicity rate was 12 (16.7%), of which the incidence of heart failure, acute coronary syndrome, life-threatening arrhythmias, ΔLVEF ≥ 10%, and LVEF < 53% was 0 (0.0%), 1 (1.4%), 0 (0.0%), and 12 (16.7%), respectively. Baseline miR-130a expression was negatively correlated with LVEF (%) and positively correlated with cardiac troponin I. The expression of miR-130a gradually increased in both cardiotoxicity and noncardiotoxicity patients during EC-D+T treatment, while the increment of miR-130a was more obvious in cardiotoxicity patients compared with non-cardiotoxicity patients. Further logistic regression and receiver operating characteristic curve analysis indicated that miR-130a was an independent predictive factor for increased cardiotoxicity risk. Conclusion MiR-130a increases constantly and predicts high cardiotoxicity risk during ECD+T adjuvant chemotherapy in HER2+ breast cancer patients.

Objective To explore the effects of exposure to lipopolysaccharides in late pregnancy on age-related cognitive changes in offspring of mice,and to investigate whether there is a gender specific genetic effect.Methods Institute of cancer research(ICR)CD-1 mice during gestational days 15-17 were injected with lipopolysaccha-ride daily(LPS group,50 μg/kg),or equal volume of normal saline(CON group).At the age of 2 months after their delivery,LPS treated offspring mice(F1-LPS,male and female)were randomly selected and hybridized with age-matched wild-type CD-1 mice.F1-LPS males and females with different littermates,and F1-CON males and fe-males were hybridized to obtain F2 generations of different lineages.Similarly,F2-LPS mice were mated with wild-type mice to conceive the F3 generation.At the age of 3 and 18 months old,F1,F2,and F3 mice(n=8 in each group)were randomly selected to complete the Morris maze experiment in order to test their cognitive abilities.Re-sults Compared with 3-month-old CON mice,18-month-old CON mice showed poorer learning and memory abili-ties,especially in females.For Fl generation,the learning and memory abilities of the 3-month-old and 18-month-old F1-LPS mice were inferior to those of the same aged CON mice.For F2 generation,the 3-month-old F2-LPS-parental mice had poorer learning and memory compared to the same aged CON mice,while the F2-LPS-paternal mice only had poorer memory compared to the same aged CON group.The learning and memory abilities of 18-month-old F2-LPS paternal and F2-LPS-parental mice were inferior to those of the same aged CON mice.The learn-ing and memory abilities of F2-LPS maternal male mice were inferior to those of CON male mice,and the memory abilities of F2-LPS maternal mice were stronger than those of F2-LPS-parental mice.With regards to the F3 genera-tion,the memory of the 3-month-old F3-LPS-parental mice was poorer than that of the same aged CON mice.The learning and memory abilities of F3-LPS paternal and F3-LPS-parental mice at 18 months old were inferior to those of CON mice of the same age.The 18-month-old F3-LPS maternal and paternal male mice had better memory than F3-LPS-parental male mice.Conclusion Exposure to lipopolysaccharides in late pregnancy can accelerate age-re-lated cognitive decline in offspring mice,and it has a cross generational genetic effect and gender differences,mainly in paternal inheritance.

BACKGROUND:Troxerutin has been found to have a significant ameliorative effect on brain disorders,but there are fewer studies on the effects of troxerutin on the treatment of cerebral infarction and on neuronal cells. OBJECTIVE:To investigate the mechanism by which troxerutin regulates nuclear factor-κB signaling pathway to reduce brain injury and neuronal apoptosis in cerebral infarction rats. METHODS:Fifty clean grade rats were randomized into healthy group,model group,and troxerutin+nuclear factor-κB agonist group,troxerutin group,and nuclear factor-κB inhibitor group.Except for the healthy group,all other groups were used to establish a rat model of cerebral infarction by arterial ligation.The healthy and model groups were treated once a day with an equal amount of physiological saline by gavage.The troxerutin+nuclear factor-κB agonist group was intervened with 72 mg/kg troxerutin by gavage+20 mg/kg RANK intraperitoneally.The troxerutin group was treated with 72 mg/kg troxerutin by gavage.The nuclear factor κB inhibitor group was intervened intraperitoneally with 120 mg/kg nuclear factor κB inhibitor pyrrolidine disulfiram.Administration in each group was given once a day for 30 continuous days.Zea-longa was used to detect neurological damage in rats,hematoxylin-eosin staining was used to observe pathological changes,TUNEL was used to detect neuronal apoptosis,and immunoblotting and PCR were used to detect the expression of nuclear factor-κB p65 and nuclear factor-κB p50 at protein and mRNA levels,respectively. RESULTS AND CONCLUSION:Compared with the healthy group,the neurological function score,neuronal apoptosis rate,nuclear factor-κB p65,nuclear factor-κB p50 mRNA and protein expression levels were elevated in the model group(P＜0.05).Compared with the model group,the neurological function score,neuronal apoptosis rate,nuclear factor-κB p65 and nuclear factor-κB p50 mRNA and protein expression levels were decreased in the troxerutin+nuclear factor-κB agonist group(P＜0.05).Compared with the troxerutin+nuclear factor-κB agonist group,the neurological function score,neuronal apoptosis rate,nuclear factor-κB p65 and nuclear factor-κB p50 mRNA and protein expression levels were reduced in the troxerutin group and nuclear factor-κB inhibitor group(P＜0.05).In addition,there was no difference between the troxerutin group and the nuclear factor-κB inhibitor group(P＞0.05).In the model group,there was a large number of cytoplasmic vacuolation,obvious edema and necrosis,and a large number of inflammatory cell infiltrations.In the troxerutin+nuclear factor-κB agonist,the swelling of brain tissue was reduced,and reticulate structures and condensed cells were reduced,still with some edema.In the troxerutin group and nuclear factor-κB inhibitor group,brain tissue swelling,neuronal edema degeneration,cytoplasmic vacuolation and neuronal nucleus consolidation were reduced,and the inflammatory cell infiltration was significantly decreased.To conclude,troxrutin can reduce the expression of neurological impairment,inhibit neuronal apoptosis and improve the pathological injury of brain tissue in rats with cerebral infarction,and its mechanism of action may be related to the modulation of nuclear factor-κB expression and related signaling pathways.

Objective To investigate the application and the effects of individualized hollow resin plugs in the prevention of external auditory canal stenosis after canaloplasty of external auditory meatus for microtia patients . Methods The clinical data of 65 patients (68 ears) with microtia and aural atresia hospitalized in our department from January ,2006 to December ,2015 were summarized .Otoplasty of external ears and canaloplasty of external auditory meatus were operated on all patients under general anesthesia .Thigh flap transplantation was lined in the bony canal .One month later ,individualized hollow resin plugs were made and worn for 6 to 12 months ,and fol-lowed up for 1～2 years .Results The shapes of the reconstructed auricles were satisfactory .Sixty-four ears with wide external auditory canal openings were recorded in 68 ears .Preoperative hearing was 70 .45 ± 5 .5 dB HL ,and postoperative hearing was 55 .55 ± 5 .2 dB HL .Their hearing was not affected .External auditory canal restenosis occurred in 4 ears .Conclusion The individualized hollow resin plugs do not affect the hearing in use ,and can effec-tively prevent the restenosis of the external auditory canal after microtia reconstruction .

Objective:To evaluate the effects of human umbilical cord mesenchymal stem cells-derived exosomes (hUCMSCs-ex) injection on cardiac function and myocardial fibrosis in dilated cardiomyopathy (DCM) rats induced by Adriamycin(ADR).Methods:One hundred male SD rats were randomly divided into the normal group (20 rats) and the DCM group (80 rats). The rats in DCM group were treated with ADR by intravenous injection to induce DCM.DCM rats were randomly divided equally into DCM group, low-dose group, medium-dose group and high-dose group which were received intravenous injection 1 mL/kg Dulbecco′s modified eagle medium(DMEM), 20 μg/kg, 100 μg/kg and 250 μg/kg exosomes.After modeling, 10 rats in normal group and 30 rats in DCM group were randomly selected to receive echocardiography to evaluate the cardiac function.After exosomes treatment, 10 rats were randomly selected form each group for echocardiography to evaluate the cardiac function.The morphological changes in myocardial cells were observed by using Masson staining in each group; Western blot detection between groups of rats was used to analyze the expression of myocardial collagen Ⅰ type(COLⅠ), Smad2 and alpha smooth muscle actin (α-SMA).Results:Left ventricular ejection fraction(LVEF) and left ventricular fraction shortening (LVFS)in the DCM group [(64.30±3.51)% and (38.70±2.85)%] were significantly lower than those of the normal group [(78.80±1.52)% and (50.60±1.50)%], and the differences were statistically significant ( t=20.518, 22.311, all P<0.01). The left ventricular end-diastolic diameter(LVEDD) and left ventricular end-systolic diameter (LVESD) [(4.62±0.13) mm and (3.40±0.12) mm] of the DCM group were significantly higher than those of the normal group[(3.29±0.24) mm and (3.16±0.33) mm], and the differences were statistically significant( t=2.854, 3.800, all P<0.01). After exosomes treatment, LVEF[(84.3±2.6)% and (83.4±3.2)%] in the medium-dose and high-dose groups were significantly higher than that in the DCM group [(79.2±2.4)%], and the diffe-rences were statistically significant(all P<0.01). Masson staining found that collagen fibers were less in exosomes treating group than those in the DCM group; Western blot test showed that high-dose exosomes can reduce the expression of α-SMA and Smad2, high-dose and low-dose exosomes can both significantly reduce the expression of COLⅠ. Conclusions:It suggests that exosomes intravenous injection from hUCMSCs-ex can significantly improve myocardial fibrosis in DCM rats induced by ADR and cardiac function.

To construct, express and purify Exendin-4 analogue and detect its biological activity in vivo. Insert gene sequence into fusion partner ofpED plasmid which is helped to purification, entitled the new recombinant plasmid 5 Exendin-4 analogue polypeptide gene and fusion partner gene was linked by acid hydrolysisgene, transformed to E. coli BL21 and the fusion protein was induced by lactose. After acid hydrolysis, the Exendin-4 analogue polypeptide separated from fusion chaperon. Anion charge chromatography were used to further purification. 6 to 8 week-old ICR mice were injected (s.c) with Exendin-4 analogue, blood glucose and plasma insulin level was detected in different period after oral glucose tolerance test. The results show that high expression of inclusion body was induced by lactose, which accounted for 40% of germ proteins, the Exendin-4 analogue was obtained with the purity of 91.8% after being purified by anion charge chromatography. Bioactivity assay showed that the level of blood glucose of mouse which treated with exendin-4 analogue was obviously decreased to normal (P < 0.01), and the level of plasma insulin was increased obviously (P < 0.01).
Animals ; Cloning, Molecular ; Escherichia coli ; genetics ; metabolism ; Gene Transfer Techniques ; Hypoglycemic Agents ; metabolism ; pharmacology ; Insulin ; blood ; Male ; Mice ; Mice, Inbred ICR ; Peptides ; genetics ; pharmacology ; Recombinant Fusion Proteins ; biosynthesis ; genetics ; pharmacology ; Venoms ; biosynthesis ; genetics ; pharmacology

Objective:To investigate the clinical presentations and early recognition features of infant botulism(IB).Methods:Retrospective case analysis.The clinical data of 14 patients with IB admitted to the Department of Emergency of Beijing Children′s Hospital Affiliated to Capital Medical University between January 2019 and June 2023 were retrospectively analyzed.Results:The age of onset was 4.2(1.9-8.6) months.Ten cases(71.4%) were under 6 months, 9 of whom had a toxic trigger.The median time of first visit was 1(0-8) day.Thirteen cases(92.9%) complained of poor feeding/milk refusal, of whom pupillary light reflex was sluggish/absent in 12(85.7%) infants, 11(78.6%) had constipation, 10(71.4%) had weakness and/or lethargy, and 9(64.3%) had myasthenia of limbs and/or reduced movement of the extremities, decreased muscle tone and strength of the extremities occurred in all infants, and bowel sounds were diminished or vanished in 10 infants(71.4%).Only 2 infants were suspected of IB at the first visit.The mouse bioassay showed positive fecal specimens in all 14 infants, with a time of diagnosis of 3(1-10) days.Eleven cases(84.6%) had varying degrees of intestinal stasis, and 1 case had reduced physiologic pneumatosis in the small intestine.Ten infants underwent the neostigmine test: one was positive, and one was suspiciously positive.Ten cases(71.4%) required mechanical ventilation, 7(50.0%) of whom used invasive respiratory support.The median length of hospital stay was 26(11-61) days.All the infants were essentially cured by the time they left the hospital.Conclusions:If infants are previously fit and conscious but have an acute onset of illness with parental complaints of poor appetite, weak reactions, and weakness of the extremities and are found to have cranial nerve palsy, signs of acute flaccid paralysis, abdominal distension, and diminished bowel sounds during the examination, the possibility of IB should be considered, and a fecal specimen should be sent for botulinum toxin assay as soon as possible.