The presence of a putative GRP receptor on rat pancreatic particulate membranes was demonstrated by covalent cross-linking to 125I-gastrin releasing peptide (GRP), which revealed a radioactive band with Mr = 80-90 kDa on reduced SDS-PAGE. Fresh rat pancreatic membranes contained a GRP receptor which was solubilized with Triton X-100 as assessed by its failure to sediment at 100,000 x g for one hour and its ability to pass through a 0.22 mu filter. When 125I-GRP binding was studied using Sephadex G50 gel filtration chromatography to separate bound from unbound ligand, substantial amounts of 125I-GRP binding were observed in rat crude solubilized pancreatic membranes, but essentially no specific binding was observed until the crude solubilized membranes were fractionated by ammonium sulfate precipitation. Specific 125I-GRP binding was 500, 700 and 1400 fmol/mg protein, respectively, in the 0-25%, 25-50% and 50-80% saturated ammonium sulfate fractions (125I-GRP concentration = 1 nM). Specific binding was temperature dependent, saturable and of high affinity, (KD = 2.3 nM). A unique 70 kDa band was visualized by silver staining of the SDS-PAGE of eluates of GRP(14-27) affinity gel compared with eluates of control affinity gels incubated with the 25-50% (NH4)2SO4 fraction. The lower Mr than that observed with covalent cross-linking may represent the binding subunit of a larger receptor protein. This ligand-affinity isolated protein is thus a good candidate for the GRP receptor, or the binding subunit of it, from normal rat pancreas.

Ammonium Sulfate↗

PubMedDate not supplied

The detection of loosening in total hip arthroplasty: description of a stereophotogrammetric computer assisted method.

Explore the source record for details and available documents.

Computers↗

PubMedDate not supplied

Jejunostomy tube feedings should not be stopped in the perioperative patient.

BACKGROUND: Anesthetic standard of care is to restrict oral intake for 8 hours before elective surgery. There is no research addressing appropriate preoperative discontinuation of jejunostomy tube (J-tube) feedings. We hypothesized that patients could be fed safely, via a J-tube, until the time of surgery. METHODS: Patients admitted to a Level I Trauma Center, having J-tubes and undergoing a nonabdominal operation, were prospectively evaluated. Group I patients received J-tube feedings until transport to the operating room. Group II patients had tube feedings discontinued for at least 8 hours before surgery. Data were compared using the Student's t test and contingency table analysis. RESULTS: There were 46 patients in group I and 36 in group II. There was no incidence of aspiration. Patient groups did not differ in age, mortality, length of stay, injury severity score, or ventilator days. Group I patients had tube feedings discontinued for fewer hours before and after surgery than group II patients (before surgery: 1.40 +/- 1.20 vs 11.61 +/- 5.01, respectively; p < .001; after surgery: 2.99 +/- 7.49 vs 7.11 +/- 9.03, respectively; p = .043); received more kilocalories/ grams of protein on the day of surgery (group I vs group II, 1676.15/89.57 +/- 1133.21/38.04 vs 791.14/57.58 +/-498.66/79.87, respectively; p = .001/p = .032) and more kilocalories/grams of protein on the first postoperative day (group I vs group II, 1580.74/92.57 +/- 600.53/37.96 vs 1152.47/63.53 +/- 733.96/39.40, respectively; p = .006/p = .001). CONCLUSIONS: Patients receiving J-tubes who are undergoing nonabdominal operations may safely continue enteral nutrition at maximum protein and caloric intake until surgery.

Adult↗

PubMedDate not supplied

Effects of intensity of treatment and length of stay on rehabilitation outcomes.

The combined effects of intensity of treatment and length of stay during inpatient rehabilitation hospitalization on the outcomes of 95 traumatic brain injury patients were examined. Outcome was assessed using the Rancho Scale and three measures of functional status--physical performance, higher-level cognitive skills, and cognitively mediated physical skills. The effects of intensity of treatment and length of stay were assessed using 2 x 2 analyses of variance with repeated measures. The results showed clearly that both length of stay and intensity of treatment affect outcomes. Patients in the long length of stay group consistently made more progress across all outcome variables than patients in the short length of stay group. However, the greater progress of the long length of stay patients was from a point significantly more disabled than that of the short length of stay patients, with improvement at discharge to the point at which the groups were now equal. The effect of intensity of treatment was significant or closely approached significance for higher-level cognitive skills and Rancho Level. In the long length of stay group, the two intensity groups were initially equivalent, but at discharge the high-intensity group surpassed the low-intensity group. The practical implications of the results are discussed.

Adult↗