OBJECTIVEThis study aims to evaluate the antimicrobial activity of decapeptide, a novel antimicrobial peptide, against several major cariogenic and periodontopathogenic bacteria in vitro. METHODS In this study, we investigated the antimicrobial activity of decapeptide against Streptococcus mutans (S. mutans), Streptococcus sobrinus, Lactobacillus acidophilus, Streptococcus sanguis, Streptococcus gordonii, Actinomyces viscosus, Actinomyces naeslundii, Porphyromonas gingivalis, Prevotella intermedia, Fusobacterium nucleatum, Actinobacillus actinomycetemcomitans, and Saccharomyces albicans in vitro using the agar diffusion method and broth dilution method. Furthermore, a time-kill kinetic study of decapeptide against S. mutans was performed.

RESULTSThe results showed that decapeptide exhibited antimicrobial activity against various oral bacteria and fungi. The minimum inhibitory concentration (MIC) of main cariogenic bacteria ranged from 62.5 μg · mL(-1) to 125 μg · mL(-1), and the MIC of periodontopathogenic bacteria tested ranged from 250 μg · mL(-1) to 1,000 μg · mL(-1). Among the bacteria tested, decapeptide had a strong inhibitory effect on cariogenic S. mutans. Results of the time-kill kinetic studies showed that decapeptide reduced the viable counts of S. mutans by more than one order of magnitude after 20 min of incubation, and thoroughly killed S. mutans after 30 min. No viable cells could be detected after 24 h of incubation.

CONCLUSIONThis study suggest that decapeptide might have potential clinical application in treating dental caries by killing S. mutans within dental plaque.

Aggregatibacter actinomycetemcomitans ; Anti-Bacterial Agents ; Anti-Infective Agents ; Bacteria ; Dental Caries ; Dental Plaque ; Kinetics ; Microbial Sensitivity Tests ; Mouth ; microbiology ; Porphyromonas gingivalis ; Streptococcus mutans

ObjectiveTo explore the influence of washable type subglottic attract on incidence of ventilator-associated pneumonia (VAP) in patients with mechanical ventilation. Methods356 cases in need of mechanical ventilation from July 2009 to July 2010 in our hospital were chosen as the research object.They were randomly divided into the observation group and the control group with 178 cases in each group.The control group was treated with conventional endotracheal tube for mechanical ventilation.The observation group used washable type subglottic endotracheal tube to attract for mechanical ventilation.The VAP rate for the two groups occurred during mechanical ventilation in ventilator was compared.Migration of the dominant bacteria of the subglottic secretion was detected,underwent pathogenic examination and drug sensitivity test. ResultsThe VAP rate was significantly lower in the observation group than that of the control group.186 bacteria strains were detected from subglottic secretion,and 169 were detected from lower respiratory tract. ConclusionsWashable type subglottic attract for mechanical ventilation can reduce the risk of ventilator-associated pneumonia for patients with mechanical ventilation significantly,and it is worthy of clinical application.

A harmonious relationship between doctors and patients is an important aspect of the socialist harmonious society. The key of harmonious relationship is to perform effective humanistic caring for patients, to change the service model, to perfect the attitude of service; the patients should seek scientific medical help and adopt a rational attitude towards possible medical accidents. Thus the kind of concordant ambience will come into being in medical treatment.

Objective This study aims to evaluate the antimicrobial activity of decapeptide, a novel antimicrobial peptide, against several major cariogenic and periodontopathogenic bacteria in vitro. Methods In this study, we investigated the antimicrobial activity of decapeptide against Streptococcus mutans (S.mutans), Streptococcus sobrinus, Lactobacillus acidophilus, Streptococcus sanguis, Streptococcus gordonii, Actinomyces viscosus, Actinomyces naeslundii, Porphyromonas gingivalis, Prevotella intermedia, Fusobacterium nucleatum, Actinobacillus actinomycetemcomitans, and Saccharomyces albicans in vitro using the agar diffusion method and broth dilution method. Furthermore, a time–kill kinetic study of decapeptide against S. mutans was performed. Results The results showed that decapeptide exhibited antimicrobial activity against various oral bacteria and fungi. The minimum inhibitory concentration (MIC) of main cariogenic bacteria ranged from 62.5 μg·mL-1 to 125 μg·mL-1, and the MIC of periodontopathogenic bacteria tested ranged from 250 μg·mL-1 to 1 000 μg·mL-1. Among the bacteria tested, decapeptide had a strong inhibitory effect on cariogenic S.mutans. Results of the time–kill kinetic studies showed that decapeptide reduced the viable counts of S. mutans by more than one order of magnitude after 20 min of incubation, and thoroughly killed S.mutans after 30 min. No viable cells could be detected after 24 h of incubation. Conclusion This study suggest that decapeptide might have potential clinical application in treating dental caries by killing S.mutans within dental plaque.

Objective To compare the efficacy and side effects of split-dose Polyethylene glycol-electrolyte solution ( PEG ) with full-dose preparation in the elderly for colonoscopy, and to summary the experience of nursing care. Methods A total of 220 elderly undergoing colonoscopy were randomly divided into experimental group ( group A) and control group ( group B) , 110 cases in each group. Group A took half the dose of PEG (1. 5 L) at 5 PM on the day before colonoscopy and the remaining half (1. 5 L) were instructed to drink at 6 AM on the day of colonoscopy. Group B took all the PEG (3 L) at 6 AM on the day of colonoscopy. The quality of bowel cleansing was assessed according to the Boston bowel preparation scale ( BBPS) , and side effects ( nausea, vomiting, abdominal pain, fatigue and hunger ) and complication were also observed. In addition, the polyps and tumors of colon detection were compared within the two groups. Results The level of bowel preparation in group A was superior to group B [(6. 65 ± 1. 67) vs (6. 14 ± 1. 91, t =2. 097, P <0. 05)], however, the incidence of side effects such as nausea and vomiting, abdominal pain and bloating in group A were 14 cases, 34 cases and 22 cases less than those of group B (χ2 =4. 400,4. 111,4. 002,respectively;P<0. 05). The detection rate of colonic polyps and tumors in group A (37. 3%) were also higher than that of group B (24. 5%) (χ2 =4. 172, P<0. 05). Conclusions The use of a split-dose PEG for bowel preparation before colonoscopy significantly improved bowel preparation. Split-dose preparation is associated with a lower incidence of side effects, and higher detection rate of colonic polyps and tumors in the elderly.

Objective:To analyze the target design and dosimetric parameters of patients with recurrent adenoid cystic carcinoma (ACC) in the parotid gland who were treated with 125I interstitial brachytherapy alone. Methods:A retrospective analysis was conducted for 25 patients with recurrent adenoid cystic carcinoma in parotid gland who were histopathologically diagnosed between January 2015 and October 2019. These patients were treated with 125I interstitial brachytherapy alone, with prescribed doses of 100-120 Gy. The target volume was designed according to the pathological characteristics of ACC and recurrence sites. The pre- and post-operation dosimetric parameters (i.e., local control rates) were calculated using the treatment planning system. Results:In this study, the local recurrence sites included the superficial lobe (10/25) and deep lobe (7/25) of the parotid gland primarily and the skull base region (four patients) and mastoid posterior region (four patients) secondarily. The number of 125I seeds ranged from 16 to 111, with a median number of 59. The activity of radioactive particles was 18.5-25.9 MBq. The 3- and 5-year local control rates were 81.5% and 61.5%, respectively. No significant differences were found between pre- and post-operative dosimetric parameters such as D90, V100, and V150. There was no significant difference in local control rates among the four different recurrence sites. Conclusions:125I interstitial brachytherapy is proven to be an effective approach in the treatment of recurrent adenoid cystic carcinoma in the parotid gland. Satisfying local control rates can be achieved through target delineation performed according to recurrence sites and perineural invasion characteristics of ACC.

This study aimed to compare clinical features between membranous nephropathy (MN) and nonmembranous nephropathy (non-MN), to explore the clinically differential diagnosis of these two types, and to establish a diagnostic model of MN. After renal biopsy was obtained, 798 patients were divided into two groups based on their examination results: primary MN group (n = 248) and non-MN group (n = 550). Their data were statistically analyzed. Logistic regression analysis indicated that anti-PLA2R antibodies, IgG, and Cr were independently correlated with MN, and these three parameters were then used to establish the MN diagnostic model. A receiver operating characteristic (ROC) curve confirmed that our diagnostic model could distinguish between patients with and without MN, and their corresponding sensitivity, specificity, and AUC were 79.9%, 89.4%, and 0.917, respectively. The cutoff value for this combination in MN diagnosis was 0.34. The established diagnostic model that combined multiple factors shows a potential for broad clinical applications in differentiating primary MN from other kidney diseases and provides reliable evidence supporting the feasibility of noninvasive diagnosis of kidney diseases.

Netrin-1, an axon guidance factor, and its receptor UNC5B play important roles in axonal development and angiogenesis. This study examined netrin-1 and UNC5B expression in kidneys with diabetic kidney disease (DKD) and investigated their roles in angiogenesis. Netrin-1 and UNC5B were upregulated in streptozotocininduced DKD Wistar rats, and their expression was compared with that in healthy controls. However, exogenous netrin-1 in UNC5B-depleted human renal glomerular endothelial cells (HRGECs) inhibited cell migration and tubulogenesis. This effect was likely associated with SRC pathway deactivation. Netrin-1 treatment also eliminated the pro-angiogenic effects of exogenous VEGF-165 on UNC5B-silenced HRGECs. These results indicate that UNC5B antagonizes netrin-1 and that UNC5B upregulation contributes partly to enhancing angiogenesis in DKD. Therefore, introducing exogenous netrin-1 and depleting endogenous UNC5B are potential strategies for reducing the incidence of early angiogenesis and mitigating kidney injury in DKD.

"The Expert Group on Tumor Ablation Therapy of Chinese Medical Doctor Association, The Tumor Ablation Committee of Chinese College of Interventionalists, The Society of Tumor Ablation Therapy of Chinese Anti-Cancer Association and The Ablation Expert Committee of the Chinese Society of Clinical Oncology" have organized multidisciplinary experts to formulate the consensus for thermal ablation of pulmonary subsolid nodules or ground-glass nodule (GGN). The expert consensus reviews current literatures and provides clinical practices for thermal ablation of GGN. The main contents include: (1) clinical evaluation of GGN, (2) procedures, indications, contraindications, outcomes evaluation and related complications of thermal ablation for GGN and (3) future development directions.
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