The patterns of random amplified fragments and molecular karyotypes of 12 isolates of anuran trypanosomes continuously cultured in vitro were compared by random amplified polymorphic DNA (RAPD) analysis and pulsed field gradient gel electrophoresis (PFGE). The time interval between preparation of two series of samples was one year. Changes were not observed in the number and size of sharp, amplified fragments of DNA samples from both series examined with the ten primers used. Likewise, changes in the molecular karyotypes were not detected between the two samples of these isolates. These results suggest that the molecular karyotype and the RAPD patterns of the anuran trypanosomes remain stable after being cultured continuously in vitro for one year.
The article introduces the basic principles of compensation for medical malpractice, mainly by means of a civil liability sytem, in the Czech Republic. It outlines the normative framework and illustrates its application in practice on selected case law of Czech courts. As the judicial system has both advantages and disadvantages, available alternatives to court proceedings are also discussed even if they tend to be uaed rather conservatively. Furthermore, the text presents changes to the law, including those already carried out by the relatively new Civil Code and some potential future developments, together with remarks about the overall legal context in which the system of compensation for harm from healthcare operates., Tomáš Holčapek, Petr Šustek., and Obsahuje bibliografické odkazy
This study investigated whether each part of the heart is evenly innervated by the left or right vagus and observed the mechanism of compensatory recovery after unilateral cervical vagotomy. HR, BP, LVSP and ±dp/dt max all decreased one week after left vagotomy, whereas only BP and -dp/dt max decreased one week after right vagotomy. We stern blot analyses revealed that the expression of M2 receptors in the left atrium and left ventricle was upregulated after subacute (1 week) left/right vagotomy. However, significantly more cholinesterase-positive nerves in LV and RV were seen one week after unilateral vagotomy compared to the sham-operated group. In addition, baroreflex sensitivity was increased after subacute right vagotomy. The decreasing effects of ACh (0.5 μ g/kg) on LVSP and ±dp/dt max (but not on HR and BP) were facilitated by subacute unilateral vagotomy. Our present experiments indicate that 1) the working myocardium is innervated bilaterally by the vagus, 2) ventricular contractility is influenced more by denervation of the left than the right vagus and 3) up-regulation of M2 muscarinic receptors in the left heart, increase of cholinergic nerves, and high baroreflex sensitivity could be involved in the mechanism of compensatory hemodynamic recovery via contralateral vagus overactivity, thereby amplifying contralateral vagal activity and decreasing cardiac contractility., L. N. Chen, W. J. Zang, X. J. Yu, J. Liu, D. L. Li, S. S. Kong, J. Lu, X. L. Xu., and Obsahuje bibliografii a bibliografické odkazy
Interspecific competition between fat hen (Chenopodium album L.) and sunflower (Helianthus annuus L. NSH-33 hybrid) in pure and mixed stands of identical plant density (35 x 35 cm spacing) was studied in smáli plot field experiments under drought stress. Decrease in net photosynthetic rate (E^) due to interspecific competition was not statistically significant in either species in the first part of the growing season. During drought stress, however, significantly decreased in sunflower, while it hardly changed in C. album in the same (interspecific) competition situation. In pure stands, transpiration rate (E) was lower in C. album than in sunflower and this difference was more pronoímced in mixed stands. Consequently, C. album showed a very high water use efficiency (WUE) especially in the shade layer, which accounts for a larger part of the canopy in this species. By contrast, WUE in sunflower decreased, especially in the sun layer of the mixed stand. Interspecific competition reduced the total biomass more severely in sunflower than in C. album by the end of the growing season. The reduction was especially remarkable in the biomass of the reproductive organs. Reproductive effort expressed as reproductive allocation was higher in C. album than in sunflower. Hence the reproductive effort in sunflower and C. album in both intra- and interspecific competition seemed to be correlated with WUE, which is a prime characteristic of drought stress tolerance.
Short-term thymectomized (two months after thymectomy) adult rainbow trout, Oncorhynchus mykiss (Walbaum) infected with the flagellate Cryptobia salmositica Katz, 1951 responded well during primary infection with C. salmositica and recovered fish also showed secondary response (rapid production of complement fixing antibody after homologous challenge) five months after recovery. Complement fixing antibody was detected during primary and secondary responses and the titres of complement fixing antibody in thymectomized fish were significantly lower than those in infected intact fish. The parasitaemia in thymectomized infected fish was significantly lower than in intact infected fish. Both recovered thymectomized fish and intact fish were protected from cryptobiosis when they were challenged. Similarly, long-term thymectomized fish (nine months after thymectomy) vaccinated with an attenuated strain of C. salmositica were protected from cryptobiosis. There were no significant difference (P > 0.05) in parasitaemia, packed cell volume and complement fixing antibody titres between vaccinated/challenged thymectomized and vaccinated/challenged intact fish. Hence, thymectomy in adult rainbow trout did not decrease the detectable complement fixing antibody against C. salmositica in long-term thymectomized fish but reduced the detectable protective antibody in short-term thymectomized fish.
Pankreatoduodenektomie (PD) je výkonem volby v léčbě resekabilních periampulárních a pankreatických karcinomů a u některých pacientů s chronickou pankreatitidou. PD je jedním z nejnáročnějších GI/ HPB chirurgických výkonů, který zahrnuje resekci několika orgánů a rekonstrukci s několika anastomózami. Přestože mortalita se snížila na méně než 5 %, morbidita je neustále vysoká. Pacienti podstupující PD jsou většinou starší s přidruženými komorbiditami– všeobecné komplikace po takto náročném výkonu, např. ranné, hrudní, kardiální a venózní trombembolické jsou časté. Hlavní peroperační morbiditou PD je krvácení, které může být z vícero míst, jako například z lůžka žlučníku, choledochálních žil, gastrokolického trunku, pankreatoduodenálních žil, jejunálních žil, uncinátních žil a z resekované plochy pankreatu. Při preparaci ductus choledochus může dojít k poranění aberantní arteria hepatica dextra (z arteria mesenterica superior). Pankreatický únik je definován jako přítomnost tekutiny bohaté na amylázu (>3x sérová amyláza) ve drénech po dobu delší než 3 dny. Rozděluje se na typy A (bez klinického dopadu), B (perzistující, infikovaná) a C (systémová sepse, reoperace). Vyšetřením volby je počítačová tomografie; lokalizovaná kolekce se může perkutánně zadrénovat. Velký únik si vyžaduje revizi s provedením laváže a drenáže; neměla by se pokoušet korekce či předělání anastomózy. Měkký pankreas a nedilatovaný vývod jsou dva nejdůležitější rizikové faktory pro únik z pankreatické anastomózy; role oktreotidu v prevenci úniku je diskutabilní. Předoperační drenáž žlučových cest použitím endoskopicky zavedeného stentu může snížit krvácivé komplikace regulací koagulopatie, ale zvyšuje riziko infekčních komplikací. Pooperační krvácení může být časné nebo pozdní a intraluminální nebo intraabdominální. Časné intraabdominální krvácení má chirurgickou příčinu – buď jde o uvolněnou ligaturu např. z gastroduodenální arterie, nebo jedné z žil, nebo pankreatoduodenálního lůžka; měla by se provést revize a ošetření krvácení pokud je závažné. Časné intraluminální krvácení bývá z jedné z anastomóz- nejčastěji pankreatické. UGIE vylučuje krvácení z gastroduodenální anastomózy (pokud se vyskytne, lze řešit endoskopicky). Krvácení z pankreatického pahýlu se řeší reoperací − snesením přední vrstvy anastomózy nebo provedením jejunotomie. Pozdní intraabdominální krvácení bývá z pseudoaneuryzmatu tepny, obvykle gastroduodenální, způsobeného erozí abscesem sekundárně z úniku; léčbou volby je angioembolizace. Pozdní intraluminální krvácení bývá způsobené stresovým vředem při systémové sepsi, většinou sekundárně po úniku a intraabdominální sepsi. Opožděné vyprazdňování žaludku a akutní pankreatitida jsou dalšími častými komplikacemi. Reoperace po PD jsou četné, nejčastější příčinou je krvácení, poté únik; mortalita po revizi je vysoká. Mezi dlouhodobé komplikace patří stenóza anastomózy (PJ/ HJ), endokrinní a exokrinní nedostatečnost, neschopnost přibrat na váze a špatná kvalita života. Klíčová slova: pankreatoduodenektomie – komplikace, Pancreato-duodenectomy (PD) is the procedure of choice for management of resectable periampullary and pancreatic cancers and some patients with chronic pancreatitis. PD is one of the most major GI/ HPB surgical procedures performed involving resection of multiple organs and reconstruction with multiple anastomoses. While mortality of PD has been brought down to less than 5% morbidity still remains high. Patients undergoing PD are usually elderly with comorbidities – general complications of a major operation e.g. wound, chest, cardiac and venous thrombo-embolism, are common. The major intra-operative morbidity of PD is bleeding which can be from multiple sites viz. gall bladder bed, choledochal veins, gastro-colic trunk, pancreato-duodenal veins, jejunal veins, uncinate veins and cut surface of pancreas. An aberrant right hepatic artery (from the superior mesenteric artery) can be injured while dissecting the common bile duct. Pancreatic leak is defined as presence of amylase rich (>3x serum amylase) fluid in drain beyond 3 days. It is graded as A (no clinical impact), B (persists, infected) or C (systemic sepsis, reoperation). Investigation of choice is computed tomography; a localized collection can be drained percutaneously. Major leak requires reexploration at which lavage and drainage should be performed; no attempt should be made to repair or redo the anastomosis. Soft pancreas and undilated duct are the two most important risk factors for pancreatic anastomotic leak; role of octreotide to prevent the leak is debatable. Preoperative biliary drainage in the form of endoscopic stenting may reduce bleeding complications by controlling coagulopathy but increases the risk of infective complications. Postoperative bleed can be early or delayed and intra-luminal or intra-abdominal. Early intra-abdominal bleed is surgical – either a slipped ligature e.g. of the gastro-duodenal artery or one of the veins or from the pancreato-duodenal bed; reexploration should be done to control it if it is severe. Early intra-luminal bleed is from one of the anastomoses – commonest being the pancreatic. UGIE rules out bleed from the gastro/duodenal anastomosis (which if present, can be controlled endoscopically). Control of pancreatic stump bleed requires reoperation - taking down anterior layer of the anastomosis or a jejunotomy. Delayed intra-abdominal bleed is from a pseudo-aneurysm of an artery, usually gastro-duodenal caused by erosion by an abscess secondary to a leak; treatment of choice is angio-embolization. Delayed intra-luminal bleed is because of stress ulcers caused by systemic sepsis usually secondary to a leak and intra-abdominal sepsis. Other common complications include delayed gastric emptying and acute pancreatitis. Reoperations after PD are frequent – commonest cause is bleed, followed by leak; mortality of reexploration is high. Long term complications include anastomotic (PJ/ HJ) stricture, endocrine and exocrine insufficiency and inability to regain weight and poor quality of life. Key words: pancreato-duodenectomy − complications, and V. K. Kapoor
The role of alkaloids in cigarette smoke was investigated in the cumulus expansion of oocyte-cumulus complexes (OCC) isolated from large antral porcine follicles. Suppression of the cumulus expansion stimulated by FSH was observed in the presence of different concentration of cadmium, anabasine and nicotine but not its metabolite cotinine. There were comparable inhibitory effects of cadmium and nicotine on the synthesis and accumulation of hyaluronic acid in the cell/matrix compartment of OCC. The inhibitory effect of tested compounds on the cumulus expansion was accompanied by decreased progesterone synthesis by cumulus cells during 42 h incubation of OCC with FSH. The results suggest that cigarette smoking may affect intrafollicular processes, which are responsible for normal ovulation and fertilization., S. Vršanská, E. Nagyová, A. Mlynarčíková, M. Ficková, J. Kolena., and Obsahuje bibliografii
E. Filová, M. Rampichová, M. Handl, A. Lytvynets, R. Halouzka, D. Usvald, J. Hlučilová, R. Procházka, M. Dezortová, E. Rolencová, E. Košťáková, T. Trč, E. Šťastný, L. Koláčná, M. Hájek, J. Motlík, E. Amler. and Obsahuje bibliografii