Bladder tumor markers: need, nature and application. 2. Tumor and tumor-associated antigens

Three hundred and forty-five Touch football players were retrospectively surveyed to determine the nature and incidence of injuries sustained over a one year period. The definition of injury was that it prevented playing or training for at least one week. A total of 177 injuries were sustained by 117 players who participated in a total of 1043 hours of playing and training each week. The injury rate was 4.85/1000 hours of playing or training which was less than in other football codes. This rate was significantly more (p < 0.05) among males and no relationship was evident based on representative or training status. 71% of injuries were to the lower limb. 23% of all injuries involved the ankle. Less than 3% of injuries affected the head or neck. 54% of injuries were considered mild in that they only prevented playing or training for less than two weeks. Only 17% of injuries were stated to have been caused by contact with another player. This study found that the injury rate in Touch was much less than in other football codes.     

The medullary reticular formation is a site of muscle relaxant action of diazepam on deep back and neck muscles in the female rat

We tested the hypothesis that the effect of systemic injections of diazepam (DZ, 125 mg/kg) to reduce the quality of the reproductive behavior, lordosis, and to reduce the EMG of lumbar back muscles involved in lordosis (Schwartz-Giblin et al., 1984) is exerted through a reticulospinal pathway with cells of origin in the nucleus gigantocellularis that excites lumbar motoneurons indirectly (Robbins et al., 1990, Robbins et al., 1992). In contrast, DZ facilitates lordosis behavior when infused into the midbrain central gray (McCarthy et al., 1995). Direct deposits of crystalline mixtures of DZ (20-80 ng) in dextrose were delivered to the medullary reticular formation (MRF) by diffusion from a cannula inserted through a guide to which a bipolar stimulating electrode was attached. The multiunit EMG response evoked by 20 (300 ms long) stimulus trains was recorded in back and neck muscles, lateral longissimus and splenius before and 5, 15, 30 and 60 min after local DZ deposits. There was a significant reduction in EMG response over this time period when stimulus intensities were within the range of 1.2-1.5 times threshold (Friedman two-way non-parametric test, P < 0.002). Large amplitude motor units that provide large tensions were the most sensitive to DZ-induced inhibition. Control deposits of dextrose had no significant effect. Systemic injections of progesterone (1 mg, i.p.) 60 min after DZ deposits, but not after dextrose deposits, further reduced the MRF-evoked EMG responses over the course of 1 h. As predicted, DZ infusions into the midbrain central gray did not reduce the reticulospinal-evoked axial muscle response, consistent with the facilitatory effect of midbrain central gray infusions of DZ on the lordosis quotient. The results suggest that benzodiazepine agonists (if endogenous) acting at sites in the MRF would be effective muscle relaxants during pregnancy, prior to the fall in progesterone that precedes labor.     

Circular intestinal and esophageal suture with universal suture device (experimental trial)

A universal suture device (USD) able to make simultaneous two-line and cross-shaped circular clips stitches on various tube-shaped organs (vessels, intestines, esophagus, stomach, ets), creating end-to-end and end-to-side anastomosis with the external cuff is proposed. The results of experimental trials of USD and its clinical use in anastomosing main vessels were published before (8, 9, 11, 12). In this article the results of experiments with the use of USD in intestinal and esophageal sutures in 35 dogs are analysed. There were 4 series of experiments with 45 anastomoses (31 intestinal and 14 esophageal anastomoses). The anastomosed segments of the intestines and esophagus healed at the level of the lower side of the cuff. The cuff completely resumes its shape in 2.5-5 months, and the clips come off by month 7-8 after the surgery. The mucous layer of the esophagus straightened by the 2-3d month, while adventitial-muscular layer does not straigheten at all, and the clips from it could be found till the 10th month after the surgery. There were no cases of anastomotic incompetence.     

Renal cancer: preoperative evaluation with dual-phase three-dimensional MR angiography

Using a highly sensitive allele-specific PCR amplification method, we have previously shown that maternal cells could be detected in all 10 cord bloods tested. This raised the question of whether maternal cells are released into cord blood during the process of delivery or whether they are already present during pregnancy. We have now used the same PCR method to detect the presence of maternal cells in nine fetal blood samples collected at different gestational ages. Maternal cells were detected in eight samples obtained between 24 and 35 weeks of gestation. They were estimated to amount between 10(-4) and 10(-5) of nucleated fetal blood cells. In two cases mononuclear and polymorphonuclear cell fractions were separated by Ficoll gradient centrifugation and maternal cells were detected as comparable levels in both fractions. Maternal cells could not be detected in the one fetal blood sample obtained at 20 weeks of gestation, suggesting that maternal cells could appear at detectable levels in fetal blood during the third trimester of pregnancy. These results are discussed in terms of materno-fetal immune tolerance and of transmission of viruses (and more specifically of the human immunodeficiency virus) from mother to child.     

Cholesterol-independent targeting of Golgi membrane proteins in insect cells

Distinct lipid compositions of intracellular organelles could provide a physical basis for targeting of membrane proteins, particularly where transmembrane domains have been shown to play a role. We tested the possibility that cholesterol is required for targeting of membrane proteins to the Golgi complex. We used insect cells for our studies because they are cholesterol auxotrophs and can be depleted of cholesterol by growth in delipidated serum. We found that two well-characterized mammalian Golgi proteins were targeted to the Golgi region of Aedes albopictus cells, both in the presence and absence of cellular cholesterol. Our results imply that a cholesterol gradient through the secretory pathway is not required for membrane protein targeting to the Golgi complex, at least in insect cells.