Influence of the cribriform degeneration (cri) mutation on audiogenic seizures in DBA/2J mice.
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Marked prolactin (PRL) secretion in response to the ultrasonic distress vocalizations of rat pups in lactating dams deprived of their pups for 6 hr was reported by others. In two experiments, this phenomenon could not be confirmed under our testing conditions at either 1 or 2 weeks postpartum, although behavioral responses to the ultrasounds were noted. In addition, suckling-induced PRL secretion did not differ consistently as a function of the tape recording (pup ultrasounds, 45 kHz artificially produced ultrasounds, or blank tape) heard prior to the return of pups. The functional significance of rat pup ultrasounds is considered.
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Four monoclonal antibodies, each previously categorized as a member of the minor cross-reactive idiotypes of the A/J anti-p-azophenylarsonate (Ar) response, have been subjected to a detailed study of their idiotopes. All four were found to share at least one common public idiotope, with other public idiotopes expressed on some and not others of these antibodies. These CRIm were compared with 7 monoclonal anti-Ar derived from BALB/c mice that have been previously found to bear idiotopes of the BALB/c CRIc. Considerable homology of public idiotopes was demonstrated between the 4 A/J CRIm and 5 of the BALB/c CRIc(+) anti-Ar referred to as the 5AF6 family. The implications of these findings with respect to the structural basis and regulation of these idiotypes are discussed.
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Popular reactions toward government efforts to control the recent cholera epidemic in Northeast Brazil are evaluated. Intensive ethnographic interviews and participant-observation in two urban slums (favelas), reveal a high level of resistance on the part of impoverished residents towards official cholera control interventions and mass media campaigns. "Non-compliance" with recommended regimens is described more as a revolt against accusatory attitudes and actions of the elite than as an outright rejection of care by the poor. "Hidden transcripts" about "The Dog's Disease," as cholera is popularly called, voices a history of social and economic inequity and domination in Northeast Brazil. Here, cholera is encumbered by the trappings of metaphor. Two lurid cultural stereotypes, pessoa imunda (filthy, dirty person) and vira lata (stray mutt dog) are used, it is believed, to equate the poor with cholera. The morally disgracing and disempowering imagery of cholera is used to blame and punish the poor and to collectively taint and separate their communities from wealthy neighborhoods. The authors argue that metaphoric trappings have tragic consequences: they deform the experience of having cholera and inhibit the sick and dying from seeking treatment early enough. Controlling cholera requires eliminating "blaming the victim" rhetoric while attacking the social roots of cholera: poverty, low earning power, female illiteracy, sexism, lack of basic sanitation and clean water supplies, medical hegemony, etc. For health interventions to be effective, it is necessary to take into account people's "hidden transcripts" when designing action programs.
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The effect of Bacillus thuringiensis toxins on the permeability of the luminal membrane of Manduca sexta midgut columnar epithelial cells is strongly influenced by several biophysical and biochemical factors, including pH, ionic strength, and divalent cations, suggesting an important role for electrostatic interactions. The influence of these factors can differ greatly, however, depending on the toxin being studied, even for closely related toxins such as Cry1Ac and Cry1Ca. In the present study, the possibility of using temperature changes as a tool for controlling the rate and extent of pore formation in midgut brush border membrane vesicles was evaluated. Lowering temperature gradually decreased the rate of pore formation, but had little effect on the permeability of vesicles previously incubated with toxin at room temperature. The formation of new pores, following incubation of the vesicles with toxin, could thus be almost abolished by rapidly cooling the vesicles to 2 degrees C. Using this approach, changes in the rate of pore formation could be more easily distinguished from alterations in the properties of the pores formed, thus allowing a more detailed analysis of the kinetics and mechanism of pore formation.
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OBJECTIVE: To improve acute pain management for children with systematic assessment and appropriate analgesia. DESIGN: An action research design was used; pre-post data were collected during a four-phase intervention. The intervention was a social ecological approach to changing pain assessment and prescription practices. SETTING: A university-affiliated public hospital in the greater Los Angeles area. PARTICIPANTS: An interdisciplinary team of clinicians and hospital administrators were engaged in implementing new pain management procedures for children with postoperative and procedural pain. INTERVENTIONS: We implemented the Poker Chip Tool as a standard pain assessment tool, changed policy to make morphine drug of choice for acute postoperative pain, provided extensive educational activities, and conducted weekly rounds with anesthesiologist/intensivist, nurses, pharmacist, and child life specialist. Role modeling by leaders was used to build skill in interdisciplinary collaboration for staff. We promoted the initiative as an activity of the medical center strategic plan. Efforts were linked to national shifts in pain management through guideline review and use of a visiting expert. OUTCOME MEASURES: Charts were audited for assessment of pain intensity. Doses dispensed by pharmacy were used as a proxy measure of analgesia administered to children to establish change in pattern of analgesic use. RESULTS: In Phase I: 54% of charts audited had documentation of pain intensity. This rate climbed to Phase II, 93% of the audited charts at full implementation and stabilized at 84% at the project conclusion. Record of doses of analgesia dispensed demonstrated a shift from reliance on meperidine to morphine and acetaminophen with codeine. The relative rates demonstrated a 100% increase in acetaminophen with codeine distributed from the beginning of the study to full implementation of the project (chi(2) = 9.01, df = 1, p < 0.002). The relative rate for meperidine demonstrated a 250% decrease (chi(2) = 12.26, df = 1, p < 0.0004), and the relative rate for morphine exhibited a 455% increase (chi(2) = 209.20, df = 1, p < 0.0001). By the final phase (IV: Evaluation), meperidine was only 1% of the analgesia dispensed. Morphine doses that were initially 35% climbed to 62% at the close of the study. Acetaminophen with codeine shifted correspondingly from 24% to 36%. Anecdotal reports suggested that skills in assessment and building collaboration generalized to other patient care situations. CONCLUSIONS: Using a social ecology approach that focused simultaneously on the environment (ward, medical center, and national scene) and relationships among the clinical team improved pain management practices. These changes took place over 2 years and were sustained 2 years after the intense intervention.