Objective Stem cell therapy has been extensively used in clinical practice. However ,the methods available are unable to non‐invasively detect the distribution of cells in vivo. This study was aimed to establish a novel molecular imaging probe for stem cell labeling ,which would monitor cells via fluorescence imaging. Methods 1‐iodododecane was used to modify polyethyleneimine (PEI) to form amphiphilic macromolecules. These macromolecules encapsulated the hydrophobic quantum dots by self‐assembly to form imaging probes. Results Strong fluorescence signals of the probe occurred at 630 nm ,and the probe could be effectively endocyted by mesenchyme stem cells. In vivo imaging showed that significant optic signals occurred in probe‐labeled mesenchyme stem cells compared with the control cells (blank group:1.47e8 [p/s/cm2/sr]/[μW/cm2 ];test group:2.78e8 [p/s/cm2/sr]/[μW/cm2 ]). Conclusion The nanoprobes have good optic imaging effects ,and can be used to la‐bel cells.

Objective To explore the enhancement patterns of pulmonary carcinomas by contrast-enhanced ultrasound(CEUS).Methods Thirty-eight patients with pulmonary carcinomas proven by pathology[28 with peripheral pulmonary carcinomas and 10 central pulmonary carcinoma with obstructive atelectasis(OA)]were examined by baseline ultrasound and contrast-enhanced ultrasound,then the arrival time(AT),time to peak(TTP)were analyzed with time-intensity curve analysis software and the dynamic enhancement pattern of each lesion was assessed.Results Twenty-four peripheral pulmonary carcinomas demonstrated delayed AT about 6-16 s after application of contrast medium,three lesions demonstrated early AT about 4-5 s and one lesion demonstrated absence of contrast enhancement.The lesions exhibited hyper-,hypo- and non-enhancement were 14,13 and 1,respectively.Seventeen lesions were heterogenous enhanced with non-enhanced necrosis areas and enhanced septa,while ten lesions homogeneous enhanced and one lesion no enhanced.Ten central pulmonary carcinoma with OA demonstrated a characteristic pattern:OA appeared a short AT(mean AT 4.8 s)until enhancement and strong contrast enhancement,while the central tumors appeared a delayed AT(mean AT 10.5 s)and faint enhancement.Conclusions CEUS can be useful in differentiation between solid and cystic pulmonary lesions,and detection of the latent lesions underlying the atelectasis.

Adult ; Cranial Nerve Neoplasms ; Female ; Humans ; Hypoglossal Nerve ; Paraganglioma

Animals ; Glutamine ; blood ; metabolism ; Male ; Physical Conditioning, Animal ; physiology ; Physical Exertion ; physiology ; Rats ; Rats, Sprague-Dawley ; Sleep Deprivation ; metabolism ; physiopathology ; Thymus Gland ; metabolism ; Time Factors

Adult ; Carotid Artery, External ; anatomy & histology ; Humans ; Hypoglossal Nerve ; anatomy & histology ; Tongue ; anatomy & histology ; blood supply ; innervation

Objective To observe the effects of Compound Uncaria Hypotensive Tablets on expressions of MCP-1 and MMP-9 of vascular remodeling in spontaneously hypertensive rats (SHR); To discuss it possible mechanism of action. Methods Totally 24 12-week old male SHR were randomly divided into SHR model group, Compound Uncaria Hypotensive Tablets group, and positive medicine group, with 8 rats in each group. Another 8 WKY rats were set as normal control group. Medication groups were given relevant medicine for gavage for successive 6 weeks. Noninvasive tail cuff method was used to observe blood pressure; morphological changes in thoracic aorta and renal artery were observed by HE staining; immunohistochemistry was used to detect the protein expressions of MCP-1 and MMP-9 in thoracic aortic wall. Results Protein expressions of MCP-1 and MMP-9 in thoracic aortic wall of SHR model group were significantly higher than those of normal control group (P<0.01); Compared with the SHR model group, protein expressions of MCP-1 and MMP-9 in thoracic aortic wall decreased significantly in the medication groups (P<0.05, P<0.01); Compared the Compound Uncaria Hypotensive Tablets group and positive medicine group, there was no obvious difference in protein expressions of MCP-1 and MMP-9 in thoracic aortic wall. Conclusion Compound Uncaria Hypotensive Tablets can reduce the blood pressure of SHR, reduce inflammation reaction, and regulate vascular remodeling, which mechanism may be related to down-regulation of expressions of MCP-1 and MMP-9 in SHR aortic endothelial cells.

Aim To evaluate the effects of R-Salbutamol(R-Sal)on the contraction of isolated tracheal strips and lung parenchyma strips in guinea-pig,induced by Histamine(His).Methods Tracheal strips and lung parenchyma strips of guinea-pig in vitro were prepared,and the dilatory effect on shrinkage reaction of isolating specimens induced by His were measured before or after the administration of R-Sal in doses of 10-8,10-7,10-6 mol?L-1,with fix-doses pharmacology methods.The inhibitory effect was compared with that of Sal(10-6 mol?L-1).Results His could induce the contraction of isolated strips in guinea-pig in a dose-dependent manner,and R-Sal could significantly inhibit this shrinkage of lung parenchyma induced by His.in a dose-dependent manner.R-Sal was much more efficient than Sal(P

0.05).The abrupt onset of the inflammatory arteriopathy group was 10 cases(31.2%),the abrupt onset of the noninflammatory arteriopathy group was 38 cases(58.5%),there was significant difference for the mode of onset between the 2 groups(?2=6.352 P

AIM:To report the safty and efficiency of intravitreal injection of bevacizumab (Avastin) in patients with macular edema (ME) due to branch retinal vein occlusion (BRVO).METHODS: A consecutive series of patients with ME due to BRVO who were treated with intravitreal bevacizumab injection (2.5g/0.1L) were retrospectively studied. Patients underwent complete ophthalmoscopic examination, including Snellen visual acuity testing, optical coherence tomography (OCT) imaging, and/or flurescence angiographic testing at baseline and follow-up visits.RESULTS: There were 32 eyes of 32 consecutive patients who received at least one intravitreal bevacizumab injections (range from 1 to 3). The mean length of follow-up was 4.7 (range from 3 to 8) months. The mean visual acuity improved from 20/200- at baseline to 20/100- at 1 month and 20/100+ at 3 months and last follow-up (P＜0.01). The mean central 1mm macular thickness was 483μm at baseline and decreased to 275, 314,and 301μm at 1 month,3 months, and last follow-up (P＜0.01)respectively.No adverse side effects were observed following injections in any eyes.CONCLUSION: Intravitreal bevacizumab (Avastin) showed a marked decrease in ME secondary to BRVO, improvement in visual acuity and lack of adverse side effects.

Biphasic dissolution test, consisting of immiscible aqueous and organic phase, is an in vitro dissolution method that simultaneously measures the dissolution and partition of drugs. Due to the advantages of simulating in vivo absorption and overcoming the influence of surfactants on dissolution, it has been widely used to evaluate the poorly soluble drugs in vitro dissolution. Based on the relevant research in this field in recent years, this review summarizes the history, dissolution device, theoretical model and application of the biphasic dissolution test. Finally, the prospects in the development of biphasic dissolution test are also outlined.