Antagonistic and antiadhesive effects of two Lactobacillus probiotics against Pseudomonas aeruginosa isolated from burn patients

@#Aims: Today, probiotic bacteria can be used as safe and suitable candidates for the prevention of pathogenic bacterial infections. They produce antimicrobial components and compete with pathogens for host cell receptors. The present study aimed at evaluating probiotic lactobacilli antagonistic and antiadhesive activities against multi-antibiotic resistant Pseudomonas aeruginosa isolated from burned patients. Methodology and results: This study examined 100 strains of multidrug-resistant (MDR) P. aeruginosa isolated from patients, who were admitted to the burn units of hospitals. Antagonistic activity of Lactobacillus casei and Lactobacillus plantarum against P. aeruginosa was determined by a modified double layer and well diffusion methods. The antiadhesive effects of two probiotic lactobacilli and co-aggregation assay were determined by the microtiter plate method. Finally, the expression of two main adhesion genes, algD, and pelA was investigated in 100 MDR P. aeruginosa isolates via real-time polymerase chain reaction (RT-PCR) assay. Based on the results, the algD gene was detected in 97 out of 100 P. aeruginosa isolates, and the pelA gene was found in all of the isolates. Based on our findings, lactobacilli bacteria exerted good inhibitory effects on P. aeruginosa, especially on algD and pelA expression. Also, co-aggregation and antiadhesive results showed the positive effects of lactobacilli on P. aeruginosa. Conclusion, significance and impact of study: Probiotic lactobacilli can be a new suitable candidate for controlling P. aeruginosa infections.

Effects of Diospyros kaki peel, Momordica charantia, and Canavalia gladiata extracts on the cariogenic traits of Streptococcus mutans / 대한구강보건학회지

OBJECTIVES: The purpose of this study is to determine methods of dental caries prevention by investigating the use of compounds of Diospyros kaki (D. kaki) peel, Momordica charantia (M. charantia), and Canavalia gladiata (C. gladiata) extracts to limit the cariogenic traits of Streptococcus mutans (S. mutans), such as their ability to proliferate and adhere to the tooth surface. METHODS: Broth microdilution and the agar spreading assay were used to determine the antimicrobial effect and minimum inhibitory concentration (MIC) of S. mutans extracts. In order to identify the adhesive ability of S. mutans at varying concentrations, culture plates were first stained with 1 ml of 0.01% crystal violet for 15 minutes at room temperature, and then eluted with 1 ml of EtOH:Acetone (8:2) solution for 15 minutes in a 37℃ incubator. Eluted solutions were then evaluated by use of a spectrophotometer at 575 nm. RESULTS: Experiments were conducted in order to investigate the effectiveness of D. kaki peel, M. charantia, and C. gladiata extracts on limiting the proliferation of S. mutans. The MIC was measured as an indication of whether the antibacterial activity of D. kaki peel, M. charantia, and C. gladiata extracts had a significant bacteriostatic effect on S. mutans. M. charantia extract was effective for growth inhibition on S. mutans at a minimum concentration of 0.25%. From the adhesion ability assay, M. charantia extract had an anti-adhesive effect. CONCLUSIONS: These results indicate that M. charantia extract demonstrates antibacterial activity and has an anti-adhesive effect on S. mutans. Due to these properties, M. charantia extract may be used to prevent dental caries.

Correction of Cicatricial Upper Eyelid Ectropion Using a Dermofat Graft and an Anti-Adhesive Agent

Ectropion is characterized by eversion of the eyelid margin and exposure of the cornea and conjunctiva. This leaves the inner eyelid surface exposed and prone to irritation, and in severe cases, poor eye closure. Ectropion can occur for several reasons including congenital malformations, trauma, burns, anti-cancer medications, allergies, and inappropriate eyelid surgery. Surgical treatments usually include local flaps or skin grafts, depending on the severity of the defect. We present a case of successful cicatricial upper eyelid ectropion correction using a dermofat graft and an anti-adhesive agent (Guardix-Sol) after the wide release of tethering scar tissue.

Effectiveness of the Anti-adhesive Agent Protescal after Arthroscopic Rotator Cuff Repair: A Retrospective Study

BACKGROUND: Many hyaluronic acid (HA)-based anti-adhesive agents have been commercialized for clinical use in the pharmaceutical market. But their efficacy in arthroscopic rotator cuff repairs remains elusive. To determine their efficacy, we performed a comparative analysis of the effects of two hyaluronate/carboxymethylcellulose (CMC)-based anti-adhesive agents, Protescal and Guardix. METHODS: We recruited a total of 256 patients who had received an arthroscopic rotator cuff repair at our hospital between January 2014 and March 2015. Among them, 96 patients fulfilled the study's selection criteria and were enrolled as the final population sample. Thirty patients who had received a postoperative injection of Protescal were allocated into Group A. Another 30 patients who had received a postoperative injection of Guardix were allocated into Group B. As controls, 36 patients who did not receive any injection were allocated into Group C. The patients included in this study were aged between 19 and 75 years. For the clinical assessment, we measured the following clinical parameters—the visual analogue scale for pain (PVAS), the American Shoulder and Elbow Surgeons (ASES) score, and the constant score, as well as passive range of motions (ROMs)—at three time-points (preoperatively, 2-month postoperatively, and 6-month postoperatively). RESULTS: We found that Group A compared to Group B tended to show a swifter recovery in passive anterior elevation and in internal rotation by the 2-month postoperative follow-up, but the differences were not statistically significant. CONCLUSIONS: We found that the effects of HA/CMC-based injections were minimal after arthroscopic rotator cuff repairs.

Effectiveness of the Anti-adhesive Agent Protescal after Arthroscopic Rotator Cuff Repair: A Retrospective Study

BACKGROUND: Many hyaluronic acid (HA)-based anti-adhesive agents have been commercialized for clinical use in the pharmaceutical market. But their efficacy in arthroscopic rotator cuff repairs remains elusive. To determine their efficacy, we performed a comparative analysis of the effects of two hyaluronate/carboxymethylcellulose (CMC)-based anti-adhesive agents, Protescal and Guardix. METHODS: We recruited a total of 256 patients who had received an arthroscopic rotator cuff repair at our hospital between January 2014 and March 2015. Among them, 96 patients fulfilled the study's selection criteria and were enrolled as the final population sample. Thirty patients who had received a postoperative injection of Protescal were allocated into Group A. Another 30 patients who had received a postoperative injection of Guardix were allocated into Group B. As controls, 36 patients who did not receive any injection were allocated into Group C. The patients included in this study were aged between 19 and 75 years. For the clinical assessment, we measured the following clinical parameters—the visual analogue scale for pain (PVAS), the American Shoulder and Elbow Surgeons (ASES) score, and the constant score, as well as passive range of motions (ROMs)—at three time-points (preoperatively, 2-month postoperatively, and 6-month postoperatively). RESULTS: We found that Group A compared to Group B tended to show a swifter recovery in passive anterior elevation and in internal rotation by the 2-month postoperative follow-up, but the differences were not statistically significant. CONCLUSIONS: We found that the effects of HA/CMC-based injections were minimal after arthroscopic rotator cuff repairs.

Research progress on anti-adhesive products in post peritoneal surgery / 药学实践杂志

This review described the post abdominal surgery anti-adhesive products and technology used domestically and internationally .The methods of administration ,evaluation of pharmacodynamics and safety ,and mechanism of adhesion were also summarized in this article .This review provides a theoretical basis and research ideas for the development of postoperative anti-adhesive products .

Effects of a Temperature-Sensitive, Anti-Adhesive Agent on the Reduction of Adhesion in a Rabbit Laminectomy Model

OBJECTIVE: A common cause of failure in laminectomy surgery is when epidural, peridural, or perineural adhesion occurs postoperatively. The purpose of this study is to examine the efficacy of a temperature-sensitive, anti-adhesive agent (TSAA agent), Guardix-SG®, as a mechanical barrier for the prevention or reduction of peridural scar adhesion in a rabbit laminectomy model. METHODS: Twenty-six mature rabbits were used for this study. Each rabbit underwent two separate laminectomies at lumbar vertebrae L3 and L6, left empty (the control group) and applied 2 mL of the TSAA agent (the experimental group), respectively. Invasive scar formation or inflammation after laminectomy was quantitatively evaluated by measuring the thickness of the dura, the distance from the surface of dura to the scar tissues, the number of inflammatory cells in the scar tissues at the laminectomy site, and the concentration of collagen in histological sections. RESULTS: At 6 weeks postsurgery, the dura was significantly thinner and the distance from the surface of dura to the scar tissues was greater in the experimental group than in the control group (p=0.04 and p=0.01). The number of inflammatory cells was not significantly different in the two groups (p=0.08), although the mean number of inflammatory cells was relatively lower in the experimental group than in the control group. CONCLUSION: The current study suggests that the TSAA agent, Guardix-SG®, could be useful as an interpositional physical barrier after laminectomy for the prevention or reduction of adhesion.

GnRH Agonists: Are They Ready for Clinical Use as an Anti-adhesive Agent? A Review of the Literature.

GnRH agonists have been shown to intervene in the mechanism of adhesion formation in a variety of ways. Influence on the hormonal state, the inflammatory and coagulation processes contribute to the reduction of adhesion formation postoperatively. Most studies on this topic have been conducted in animal models and have indicated the possible clinical use of GnRH agonists for this purpose. The aim of this study is to investigate the literature review of the mechanisms and the possible advantages of GnRH agonists therapy in the prevention of postoperative adhesions.

Anti-adhesive Agent (Guardix-SG®) Does Not Influence the Drainage Volume after Thyroid Cancer Surgery / 대한내분비외과학회지

PURPOSE: This study was conducted to investigate whether the use of HA-CMC solution in thyroid surgery influences drainage amount and hospital stay. METHODS: Between November 2012 and December 12, 147 patients with thyroid cancer who underwent total thyroidectomy with central compartment neck dissection were analyzed retrospectively. The patients were divided into four groups; those with or without HA-CMC solution application and high or low output drainage. RESULTS: There were no differences in hospital stay and mean total drainage between the with and without HA-CMC solution application groups (P=0.230, P=0.732). The mean hospital stay was 2.2±0.4 days for the low output of drainage group and 3.1±0.6 days for the high output drainage group (P<0.001). There was no significant difference in the use of HA-CMC solution (41.1% vs. 56.8%, P=0.070). CONCLUSION: The use of HA-CMC solution in thyroid cancer surgery might not increase drainage amount and make hospital stay longer.

Effectiveness of Subacromial Anti-Adhesive Agent Injection after Arthroscopic Rotator Cuff Repair: Prospective Randomized Comparison Study

BACKGROUND: Arthroscopic rotator cuff repair generally has a good clinical outcome but shoulder stiffness after surgery due to subacromial adhesion is one of the most common and clinically important complications. Sodium hyaluronate (HA) has been reported to be an anti-adhesive agent in a range of surgical procedures. However, there are few reports of the outcomes of arthroscopic rotator cuff repair of the shoulder. This study examined whether a subacromial injection of HA/carboxymethylated cellulose (CMC) affected the postoperative shoulder stiffness and healing of rotator cuff repair, as well as the safety of an injection. METHODS: Between January 2008 and May 2008, 80 consecutive patients with arthroscopic rotator cuff repair were enrolled. The patients were assigned randomly to the HA/CMC injection group (n = 40) or control group (n = 40). All patients were evaluated using the visual analog scale (VAS) for pain, passive range of motion at 2, 6 weeks, 3, 6, 12 months after surgery, and the functional scores at 6, 12 months postoperatively. Cuff healing was also evaluated using CT arthrography or ultrasonography at 6 or 12 months after surgery. RESULTS: The HA/CMC injection group showed faster recovery of forward flexion at 2 weeks postoperatively than the control group but the difference was not statistically significant (p = 0.09). There were no significant difference in pain VAS, internal rotation, external rotation and functional scores between two groups at each follow-up period. The functional scores improved 6 months after surgery in both groups but there were no differences between the two groups. The incidence of unhealed rotator cuff was similar in the two groups. There were no complications related to an injection of anti-adhesive agents including wound problems or infections. CONCLUSIONS: A subacromial injection of an anti-adhesive agent after arthroscopic rotator cuff repair tended to produce faster recovery in forward flexion with no adverse effects on cuff healing. However, its anti-adhesive effects after rotator cuff repair should be considered carefully with further studies.

The Effect of Hyaluronate-Carboxymethyl Cellulose on Bone Graft Substitute Healing in a Rat Spinal Fusion Model

OBJECTIVE: The aim of this study was to evaluate the impact of sodium hyaluronate-sodium carboxymethyl cellulose (HA-CMC), an anti-adhesive material for spinal surgery, on bone fusion by applying it to rat spinal models after lumbar posterolateral fusion. METHODS: Lumbar posterolateral fusion was performed at L4-5 using bone graft substitutes in 30 rats. HA-CMC was injected in 15 rats at a dose of 0.2 cc (HA-CMC group) and a saline solution of 0.2 cc in the other 15 rats (control group). Simple radiographs were taken until postoperative 9 weeks with an interval of one week. At postoperative 4 and 9 weeks, three dimensional computed tomography (3D CT) scanning was performed to observe the process of bone fusion. At 9 weeks, bone fusion was confirmed by gross examination and manual palpation. RESULTS: There were no statistically significant differences in bone fusion between the two groups. 3D CT scanning did not reveal significant differences between the groups. The gross examination and manual palpation after autopsy performed at 9 weeks confirmed bone union in 93.3% of both groups. CONCLUSION: The anti-adhesive material used for spinal surgery did not have adverse effects on spinal fusion in rats.

The Effect of an Anti-adhesion Agent in Continuous Ambulatory Peritoneal Dialysis (CAPD) Catheter Insertion Operation

PURPOSE: Continuous ambulatory peritoneal dialysis (CAPD) is an important method of performing renal replacement therapy in patients with chronic renal failure. A significant complication of CAPD is malfunction of the catheter because of catheter adhesion that leads to catheter malposition. So we evaluated the effect of an anti-adhesive agent called Guardix-Sol(R). METHODS: We prospectively evaluated the clinical results of 78 patients who had received CAPD catheter insertion from Sep. 2007 to May 2009. A test group of 34 patients used the anti-adhesion agent and a control group of 44 patients did not use it. All the procedures were standardized and performed by a single surgeon. RESULTS: The patients consisted of 49 males and 29 females. The common reasons for CAPD insertion were diabetic nephropathy (47 patients) and hypertension (20 patients). Fifteen patients needed reposition operations during their postoperative course, which were done under spinal anesthesia. Out of 15 patients, 3 were from the test group (Guardix-Sol(R) group) and 12 from the control group (P=0.0526). All the repositioned patients had a malpositioned catheter because the greater omentum had adhered to the catheter, except for one patient in each group (P=0.0315). CONCLUSION: Using an anti-adhesive agent for CAPD insertion is an effective method to reduce the incidence of greater omental adhesion. So the rate of reoperation cases for catheter repositioning is decreased.

Evaluation of a lipopeptide biosurfactant from Bacillus natto TK-1 as a potential source of anti-adhesive, antimicrobial and antitumor activities / Avaliação de um lipopeptídio biosurfactante de Bacillus natto TK-1 com fonte potencial de atividade antiadesiva, antimicrobiana e antitumoral

A lipopeptide biosurfactant produced by Bacillus natto TK-1 has a strong surface activity. The biosurfactant was found to be an anti-adhesive agent against several bacterial strains, and also showed a broad spectrum of antimicrobial activity. The biosurfactant induced a significant reduction in tumor cells viability in a dose- dependent manner.

Um lipopeptídio biosurfactante produzido por Bacillus natto TK-1 apresenta intensa atividade de superfície. Verificou-se que o biosurfactante apresentou atividade antiadesiva contra várias cepas bacterianas, e também atividade antimicrobiana de amplo espectro. O biosurfactante causou uma redução significativa na viabilidade de células tumorais, de forma dose-dependente.