COMPARATIVE EVALUATION OF TAPP HERNIOPLASTY WITH USE OF VARIOUS METHODS OF FIXING THE RETICULAR ENDOPROSTHESIS AND TEP IN THE TREATMENT OF INGUINAL HERNIAS

The study was conducted with the aim to improve the results of treatment of patients with inguinal hernia by the mode of glue fixation of mesh implant in laparoscopic hernioplasty. Laparoscopic hernioplasty was performed on 96 patients at the N.D. Monastyrsky Department of Surgery of North-Western State Medical University named after I.I. Mechnikov, on the base of L.G. Sokolov Clinical Hospital № 122, in the period from 2014 to 2016. The patients were divided into three groups: I group - 36 patients, who underwent laparoscopic transabdominal preperitoneal inguinal hernia repair (TAPP) without supplying of mesh implant under spermatic cord and its fixation with cyanoacrylate glue "B-Braun" with elimination of peritoneum defect above the implant with a thread V-loc; II group consisted of 34 patients, treated with laparoscopic TAPP without cutting of mesh implant and its fixation along the periphery with titanium staples with the subsequent closing of peritoneum defect with titanium staples. Group III included 26 patients who underwent total extraperitonеal laparoscopic hernioplasty without fixation of mesh implant. All patients were males. Complex analysis of the duration of surgical procedure, patients' quality of life, number of complications and level of abdominal pain in incipient post-operative period was carried out. Laparoscopic transabdominal preperitoneal inguinal hernia repair in combination with use of glue composition for fixation of mesh implant improves the quality of life of a patient during post-operative period, contributes to early discharge from the hospital and quicker recovery for resuming job activities.

Improving the performance of small amputations in complicated forms of diabetic foot

The aim of the study was comparative assessment of the effectiveness of typical and atypical amputations at the level of footstep in patients with the most complicated course of the diabetic foot syndrome (DFS). The patients suffering from diabetes mellitus type 2 and purulo-necrotic complications of the DFS, treated in the surgical department of the № 1 Pirogov National Surgical and Medical Center of the Sankt Petersburg Clinical Complex were investigated. The study group included 68 patients who underwent atypical surgical interventions taking into account blood flow angiosomes of footstep tissues. Operative interventions at the level of footstep were carried out to 47 patients of the control group. Obligatory angiography was performed in all patients. Operative intervention was carried out under emergency conditions before conduction of angiography only to those patients who were admitted with acute purulent processes in the area of lower extremities. In all other cases individual peculiarities of blood circulation disorder in lower extremities determined the choice of tactics of operative treatment. In 76% and 46% correspondingly, for each group after angiography balloon angioplasty was carried out for reconstruction of the main blood flow. The average duration of the in-patient treatment in study group was 14,4±2,3. In the control group - 18,2±3,1. Conduction of post-operative angiography and when necessary angioplasty in the footstep tissues is prescribed before operative intervention to patients with purulo-necrotic complications of DFS. Application of the principle of angiosome blood flow based on the data of duplex sonography of arteries and angiography enables to choose the most rational tactics of the operative treatment. 3. Application of atypical technique of amputations in the area of footstep after postoperative complications enables to reduce the length of inpatient treatment and to improve postoperative mobility and ability for independent movement of patients.

Mdm2 controls CREB-dependent transactivation and initiation of adipocyte differentiation

The role of the E3 ubiquitin ligase murine double minute 2 (Mdm2) in regulating the stability of the p53 tumor suppressor is well documented. By contrast, relatively little is known about p53-independent activities of Mdm2 and the role of Mdm2 in cellular differentiation. Here we report a novel role for Mdm2 in the initiation of adipocyte differentiation that is independent of its ability to regulate p53. We show that Mdm2 is required for cAMP-mediated induction of CCAAT/enhancer-binding protein δ (C/EBPδ) expression by facilitating recruitment of the cAMP regulatory element-binding protein (CREB) coactivator, CREB-regulated transcription coactivator (Crtc2)/TORC2, to the c/ebpδ promoter. Our findings reveal an unexpected role for Mdm2 in the regulation of CREB-dependent transactivation during the initiation of adipogenesis. As Mdm2 is able to promote adipogenesis in the myoblast cell line C2C12, it is conceivable that Mdm2 acts as a switch in cell fate determination.

Electron transport through supported biomembranes at the nanoscale by conductive atomic force microscopy

We present a reliable methodology to perform electron transport measurements at the nanoscale on supported biomembranes by conductive atomic force microscopy (C-AFM). It allows measurement of both (a) non-destructive conductive maps and (b) force controlled current-voltage characteristics in wide voltage bias range in a reproducible way. Tests experiments were performed on purple membrane monolayers, a two-dimensional (2D) crystal lattice of the transmembrane protein bacteriorhodopsin. Non-destructive conductive images show uniform conductivity of the membrane with isolated nanometric conduction defects. Current-voltage characteristics under different compression conditions show non-resonant tunneling electron transport properties, with two different conduction regimes as a function of the applied bias, in excellent agreement with theoretical predictions. This methodology opens the possibility for a detailed study of electron transport properties of supported biological membranes, and of soft materials in general.

Nanoscale electrical conductivity of the purple membrane monolayer

Nanoscale electron transport through the purple membrane monolayer, a two-dimensional crystal lattice of the transmembrane protein bacteriorhodopsin, is studied by conductive atomic force microscopy. We demonstrate that the purple membrane exhibits nonresonant tunneling transport, with two characteristic tunneling regimes depending on the applied voltage (direct and Fowler-Nordheim). Our results show that the purple membrane can carry significant current density at the nanometer scale, several orders of magnitude larger than previously estimated by macroscale measurements.

Taxonomic study on nonpathogenic streptomycetes isolated from common scab lesions on potato tubers

Numerical analysis was carried out to compare sixteen nonpathogenic actinomycetes isolated from common scab lesions on potato tubers with Streptomyces scabiei type strain as well as with other streptomycete groups. These isolates were divided into two classes according to their level of similarity with S. scabiei. Isolates resembling S. scabiei were associated with S. griseoruber or with S. violaceusniger while isolates exhibiting less than 61% of similarity with S. scabiei were phenotypically related to S. albidoflavus or to S. atroolivaceus. Sequence of the 16S rRNA gene of each isolate was obtained and compared against the GenBank nucleotide database. No significant match could be established between the sequences of two potato isolates and the ones available in the GenBank database. The other isolates were closely related with S. setonii (S. griseus), S. mirabilis, S. fimbriatus, S. violaceoruber, S. melanosporofaciens and S. thermocarboxydus.

Probing Balitsky-Fadin-Kuraev-Lipatov dynamics in the dijet cross section at large rapidity intervals in pp collisions at sqrt[s]=1800 and 630 GeV

Inclusive dijet production at large pseudorapidity intervals (Deltaeta) between the two jets has been suggested as a regime for observing Balitsky-Fadin-Kuraev-Lipatov (BFKL) dynamics. We have measured the dijet cross section for large Deltaeta in pp collisions at sqrt[s]=1800 and 630 GeV using the D0 detector. The partonic cross section increases strongly with the size of Deltaeta. The observed growth is even stronger than expected on the basis of BFKL resummation in the leading logarithmic approximation. The growth of the partonic cross section can be accommodated with an effective BFKL intercept of alphaBFKL(20 GeV)=1.65+/-0.07.

Measurement of the W-->taunu production cross section in pp collisions at square root s=1.8 TeV

We report on a measurement of sigma(pp-->W+X)B(W-->taunu) in pp collisions at sqrt[s]=1.8 TeV at the Fermilab Tevatron. The measurement is based on an integrated luminosity (lum) of 18 pb-1 of data collected with the D0 detector during 1994-1995. We find that sigma(pp-->W+X)B(W-->taunu)=2.22+/-0.09 (stat)+/-0. 10 (syst)+/-0.10 (lum) nb. Lepton universality predicts that the ratio of the tau and electron electroweak charged current couplings to the W boson, gWtau/gWe, be unity. We find gWtau/gWe=0.980+/-0.031, in agreement with lepton universality.