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R Casey

Publications and source records attributed to R Casey.

At least 91 records · Page 5Linked to original sources

Isolation and characterization of a minor legumin and its constituent polypeptides from Pisum sativum (pea).

The purification and characterization of a minor legumin species from Pisum sativum is described. Electrophoretic data indicate that it corresponds to a legumin subunit pair previously designated L1. The beta-polypeptides of the minor legumin have a phenylalanine N-terminus. This is the first time that an amino acid other than glycine has been reported as the N-terminus of the basic polypeptides from legumin-like proteins from any plant species. Sequence analyses of the isolated alpha- and beta-polypeptides of the minor legumin show that it does not correspond to any of the three legumin gene families that have previously been defined on the basis of DNA hybridizations and genetic analyses.

Amino Acid Sequence↗

Legumin heterogeneity in Pisum.

Analyses of heterogeneity in legumin subunit patterns, legumin precursor polypeptides, and restriction fragments containing legumin genes have shown that Pisum (pea) genotypes vary in the extent of gene and polypeptide divergence but not in the degree of gene reiteration. Genotypes containing single and multiple alpha M subunits had the same numbers of legumin genes. The potential value of this heterogeneity in genetical analyses is outlined.

Electrophoresis↗

Minor head trauma in children: an intervention to decrease functional morbidity.

Minor head trauma is common among children and evokes strong parental reaction. Parents often rush the child to an emergency department or consult their pediatrician by telephone despite the minor nature of the injury. In a previous report we showed that children with minor head trauma appear to have limitations in their usual daily activities and a high rate of school absenteeism. This study was a prospective, randomized trial of an intervention designed to reduce this functional morbidity after head trauma. Parents in the control group (n = 168) received routine discharge instructions. Parents in the intervention group (n = 153) received a discharge interview during which the nurse gave more explicit and behaviorally oriented instructions. The nurse also called intervention parents the next day to reassure them and to urge that the children return to their usual routine. One month after the injury a questionnaire was administered by telephone to assess physical health status, social or functional limitations, and behavior problems. The majority of parents (85%) were anxious, and this was not alleviated by previous experience with head trauma. Triage nurses incorrectly rated one third of the parents as not anxious. Physical health status, role activity indices, and behavior problems, were similar for the intervention and control groups 1 month after the head injury. Subsequent morbidity was highly correlated with parental anxiety. In managing children with minor head trauma, pediatricians and emergency department physicians must focus their discharge instructions on the parent's anxiety, emphasize the minor severity of the injury, and urge that the children return to their usual routine.

Adolescent↗

Establishment of calf trabecular meshwork cell cultures.

Trabecular meshwork cell cultures have been grown from excised calf aqueous outflow pathway tissue using two different methods. In one method, tissue explants were placed directly in culture dishes and primary cultures were established by those cells migrating from the tissue. In the second method, a cell suspension was generated by incubating trabecular tissue strips with 0.1% pronase, and the washed cells were used to seed primary cultures. The cell cultures generated by each method appeared to progress through morphological and biochemical changes characteristic of the cell type, although at different respective rates. Comparisons of the cell morphologies, biosynthetic activities, and growth characteristics of the respective subcultures suggested that similar cell populations were obtained by each method. These studies further suggested that sufficient quantities of calf trabecular cells could be grown in culture to permit biochemical and pharmacological studies of trabecular-cell metabolism.

Animals↗

[Nasal reconstruction using the Converse frontal flap or a Washio retroauricular flap. Technical notes].

14 cases of nasal reconstruction by the Converse Scalping Flap or the Washio Temporo-auricular flap technique, over three years, led us to point out details necessary to insure the quality of the results. In particular, the Converse Flap must be thin; it never needs bone neither cartilage reinforcement when used in reconstructions of the two inferior third of the nose. The pedicle weaning method described allows the replacement of the scalp on thirteenth day. New data for the Washio technique are as following: --The mastoidian skin and not the retro-auricular skin must be used; --The back-cut of the scalp follows the AC line dating from three fixed points: A = helix root B = end of incision on the frontal hairline vertically to the fronto-orbital suture, and AB = AC = BC. This new data seem to warrant the fiability of the Washio flap, however the latter cannot dethrone the Converse flap, king flap of medio-facial reconstructions.

Humans↗

Morbidity following minor head trauma in children.

Head trauma, the most common form of accidental injury among children, is a source of concern for parents and pediatricians. Parents worry about a child's loss of intellectual function. Pediatricians often see the well-documented sequelae of severe head trauma as a basis for parental instructions on observation of a child after minor head injury. A prospective study of 321 children, 6 months to 14 years of age, who had sustained minor head injury within the previous 24 hours was conducted in the emergency department of the Children's Hospital of Philadelphia. Parents of all children completed a ten-minute triage questionnaire and received discharge instructions after their child had received standard medical management. One month after the injury, a questionnaire was administered in a telephone interview to assess the child's physical health status, social or functional limitations, and behavior problems. Physical morbidity was rare, and headache, the most frequent complaint, occurred in only 7% of the children. However, parents reported substantial functional morbidity, and there were significantly more behavioral problems in the 2- to 14-year-old head trauma patients than reported for the standard normal population. Therefore, children who have sustained minor head trauma manifest substantial functional morbidity despite the rarity of physical sequelae. This functional morbidity probably reflects parental overreaction and possibly family dysfunction. It is recommended that pediatricians who have determined that a child's head injury is mild should focus parental education on the rarity of physical sequelae and the importance of the child's returning to a normal routine.

Absenteeism↗

Isolation of a cDNA clone for pea (Pisum sativum) seed lipoxygenase.

A lipoxygenase cDNA clone, pCD45, was identified in a Pisum sativum L. (pea) seed mRNA cDNA library by hybrid-release/translation followed by immunoprecipitation with antiserum raised against lipoxygenase from Glycine max L. (soya bean). pCD45 hybrid-selected an mRNA encoding the larger of the two polypeptides of Mr approximately 95 000 that were immunoprecipitated from cell-free translation products of pea seed poly(A)-containing RNA by the G. max anti-lipoxygenase. 'Northern'-blot analysis showed the mRNA that hybridized to pCD45 to be approximately 3000 nucleotides in length. Three to five copies of the lipoxygenase gene corresponding to pCD45 were estimated to be present per haploid Pisum genome; hybridization of the cDNA insert from pCD45 to G. max DNA was also detected.

Centrifugation, Density Gradient↗

The oxidation of exogenous cytochrome c by mitochondria. Resolution of a long-standing controversy.

Several reports in the past have dealt with the oxidation of cytochrome c added to suspensions of rat liver mitochondria. Yet, it is generally believed that the cytochrome cannot penetrate the outer membrane. Probably it has been assumed that the permeability of the outer membrane to cytochrome c is very low but finite, and that fast oxidation may be observed if time is allowed for sufficient penetration before initiation of electron flow. Here we show that this view is false. The main fraction of rat liver mitochondria, as isolated by conventional procedures, does not catalyse any significant oxidation of added cytochrome c, even after prolonged incubation. The observed appreciable oxidation of added cytochrome c is catalysed by a very small fraction (5-12%) of the mitochondria that apparently has a damaged outer membrane. Consequently, the turnover of cytochrome oxidase is very high in this fraction during oxidation of added cytochrome c. This finding readily explains why Moyle and Mitchell (e.g., FEBS Lett. 88 (1978) 268-272; 90 (1978) 361-365) have failed to observe proton translocation by cytochrome oxidase during oxidation of ferrocytochrome c added to rat liver mitochondria, which has been their main reason for rejecting the proton-pumping function of cytochrome oxidase.

Animals↗

Measurement of gene number for seed storage proteins in Pisum.

We have measured the numbers of genes coding for the three seed storage proteins, vicilin, convicilin and legumin, in a number of Pisum genotypes of variant protein composition. No difference in gene number existed among P. sativum genotypes for any of the proteins. There were differences in the number of genes coding for individual proteins with approximately 11 genes (per haploid genome) for vicilin, 8 genes for legumin and 1 gene for convicilin.

DNA Restriction Enzymes↗

An intervention to improve follow-up of patients with otitis media.

We evaluated the effects of an educational intervention and telephone reminders on compliance with medication-taking and appointment-keeping for children with otitis media. During an initial interview we examined parents' health beliefs and other factors associated with compliance in our outpatient setting. The children were then systematically assigned to one of five study groups (G1-5). Parents in G1 received an educational session with a nurse and two follow-up telephone reminders. Parents in G2 received only two telephone reminders. Parents in G3 met with the nurse for an educational session only. Parents in G4 were exempted from interventions, while parents in G5 were exempted from the interventions and the initial interview. The telephone reminder significantly increased the return rate for follow-up appointments (p less than 0.05). This effect was not enhanced by combining it with an educational intervention focusing more on medication compliance. Relatively simple and inexpensive interventions such as the ones described here improve follow-up appointment-keeping for children with otitis media. This enhanced compliance behavior is important in obtaining better health outcomes for children with acute illnesses.

Acute Disease↗

Compliance with oral theophylline therapy in asthmatic children.

Serum theophylline levels were obtained from 111 children on continuous theophylline therapy when seen in the emergency department for acute episodes of wheezing. Sixty-six percent of patients were at least partially compliant and only 34% were noncompliant in medication taking on the basis of a serum theophylline level of less than 5 micrograms/mL. The main factors associated with compliance were type of primary care source, whether the patient had difficulty keeping appointments, and the relationship of the caretaker to the patient.

Adolescent↗

Convicilin mRNA from pea (Pisum sativum L.) has sequence homology with other legume 7S storage protein mRNA species.

Nucleotide-sequence analysis of a complementary-DNA clone for convicilin, one of the storage proteins from pea (Pisum sativum L.) seeds, shows it to be homologous with the 7S legume seed storage proteins vicilin, conglycinin and phaseolin. Convicilin is more similar to vicilin than to phaseolin or to conglycinin. Significant areas of sequence difference are discussed.

Amino Acid Sequence↗

Storage protein precursor polypeptides in cotyledons of Pisum sativum L. Identification of, and isolation of a cDNA clone for, an 80000-Mr legumin-related polypeptide.

An 80 000-Mr polypeptide, which bound to anti-legumin IgG, was detected among labelled polypeptides from cotyledons at late stages of development. When poly(A)-containing RNA from similar cotyledons was translated in a cell-free protein-synthesizing system, an 80 000-Mr polypeptide was also detected. Immunoprecipitation of translation products with anti-legumin IgG showed that, in addition to the major legumin precursor polypeptides of Mr approximately 60 000, the 80 000-Mr polypeptide was specifically immunoprecipitated. A cDNA clone, pCD32, was found to select an RNA coding for an 80 000-Mr polypeptide in hybrid-selection experiments. Additional minor polypeptides of Mr 63 000 and 65 000 were present in translation products of RNA selected by pCD32; all three polypeptides were immunoprecipitated by anti-legumin IgG. Thermal elution of RNAs bound to pCD32 showed that the affinity of pCD32 to the RNA coding for the 80 000-Mr polypeptide was greater than to the RNAs coding for the 63 000-Mr and 65 000-Mr polypeptides. In similar hybrid-selection experiments, another cDNA clone, pCD40, selected RNAs coding predominantly for polypeptides of Mr 63 000 and 65 000. A minor polypeptide of Mr 80 000 was also detected among these products; again all three polypeptides were immunoprecipitated by anti-legumin IgG. Peptide mapping revealed close similarities between the 80000-Mr polypeptide and the 63 000-Mr/65 000-Mr polypeptides obtained by translation of RNAs selected by pCD32. There were similarities also between maps obtained from translation products of RNA selected by pCD32 and those obtained from anti-legumin IgG immunoprecipitates of total translation products of poly(A)-containing RNA.

Chemical Phenomena↗

Fever therapy: an educational intervention for parents.

Fever in children is a common problem, but one which often alarms parents. Parental misconceptions often lead them to unnecessarily aggressive and inappropriate management of fever in their children. A prospective controlled trial of an educational intervention to improve parental understanding and management of fever, involving the parents of 108 children, aged 6 months to 4 years, was performed in a private group practice. Although the majority of these patients were well educated, most were found to be misinformed about many aspects of the seriousness of fever and its management. Parents in the intervention group received a standardized interview in which the management of fever was discussed, demonstrated, and practiced. In addition, they received a printed information sheet for reinforcement 2 months after the initial interview. Parents in both the control group and intervention group revealed an increase in knowledge about fever over time, but only in the intervention group were inappropriate physician contacts and medication errors reduced. The effectiveness of an active learning approach to anticipatory guidance for the management of transient febrile illness was documented and it is suggested that extension of this approach to other common problems in the private practice setting be examined.

Anti-Inflammatory Agents, Non-Steroidal↗