Transient reduction in hippocampal serotonergic innervation after neonatal parachloroamphetamine treatment

This study examined the effects of parachloroamphetamine on neonatal forebrain serotonergic (5-HT) innervation. Rat pups were treated with PCA on P3 and P4. Significant reductions in 5-HT content were observed in the hippocampal formation, frontal cortex and entorhinal cortex on P5 and P7. By P14, neocortical 5-HT had returned to normal levels while hippocampal 5-HT values remained less than control. Hippocampal 5-HT content reached normal range by P21. High affinity 5-HT uptake in hippocampal synaptosomal preparations was similarly reduced on P5 and P7 suggesting that 5-HT terminals were being lesioned by PCA. 5-HT uptake recovered significantly by P14 perhaps reflecting the extraordinary plasticity of the 5-HT projections in the neonate. However, in contrast to the complete restoration of hippocampal 5-HT content, 5-HT uptake values remained significantly less than control. No change in 5-HT content was observed in either the hypothalamus or midbrain raphe at any age studied. Thus, the rapid onset of effects, regional selectivity and transient reduction of 5-HT levels recommend the use of PCA in studies of the role of 5-HT in hippocampal development.

Calcium channel blockers in the treatment of hypertension

Physicians need to weigh the efficacy, adverse effects and cost of first-line antihypertensive agents. Calcium channel blockers lower blood pressure, improve coronary blood flow and depress cardiac contractility by relaxing smooth muscle and cardiac muscle. They have beneficial or neutral effects in hypertensive patients with angina, asthma, chronic obstructive pulmonary disease, postural hypotension, peripheral vascular disease, depression, sexual dysfunction, diabetes and hyperlipidemia. The major adverse effect of some calcium channel blockers is that they may worsen congestive heart failure in some patients. Because calcium channel blockers are metabolized in the liver, the dosage must be lowered in the elderly and in patients with hepatic disease. Diltiazem, verapamil and nifedipine represent prototypes of the three classes of calcium channel blockers, each with slightly different effects.

State unit on aging involvement with continuing care retirement community (CCRC) legislation

State units on aging (SUAs) from 29 states with continuing care retirement community (CCRC) legislation were surveyed to (a) assess staff familiarity with CCRC legislation, (b) examine interdepartmental working relationships surrounding such legislation and ask what role(s) ombudspersons are playing in CCRC oversight, (c) determine what role(s) aging units have had in developing legislation, and (d) gain insights regarding legislative impact. Results indicate that SUAs have been active in legislative development but vary greatly in the intensity of their involvement with the implementation and enforcement of CCRC regulation and in their perception of legislative impact.

The pet as an anxiolytic intervention

The effect of a pet on psychological consequences of stress (i.e., state and trait anxiety levels) of college students was examined under three test conditions (i.e., reading aloud, reading quietly, and interacting with a friendly but unknown dog). A repeated-measures analysis of variance with three covariates was used to examine the effect of the treatment on each dependent variable (state and trait anxiety). Reading aloud differed from baseline measure under all treatment conditions (p less than .001). Reading quietly and interacting with the dog were slightly below baseline for variables, with more effect seen by reading quietly than by interacting with the dog. Examination of interactions among variables showed no significant differences. Effects upon state anxiety were significant, while trait anxiety levels remained fairly constant throughout the treatments. Baseline differences in trait anxiety scores indicate a potentially greater benefit for pet owners than nonowners. Selected social network and relationship data related to the role of the pet during anxiety-producing times were also analyzed. While interaction with the pet produced a decrease in anxiety level, pet owners did not report the use of their own pet as a social support (i.e., as confidant) significantly more than did previous owners. Results indicated that interacting with a pet for some individuals does affect both physiological and psychological responses by lowering response levels. However, a parallel effect was also seen by reading quietly. Given the effect of pet interaction upon selected social support indicators of health in well college students, these data suggest the importance of examining this treatment with an "at-risk" group in which it is possible to control for ownership characteristics.

CCRC statutes: the oversight of long-term care service delivery

A 1987 national survey revealed 27 states with continuing care or life care legislation. State oversight staff in 22 states responded to questions concerning characteristics of the regulated continuing care retirement community (CCRC) industry, the regulation of health and human service delivery within CCRCs, and interdepartmental working relationships between oversight agencies and other state units. Discussion focuses on the regulation of long-term care service provision in the CCRC industry.

Lessons from the implementation of CCRC regulation

Oversight staff in 23 of the 30 states with legislation regulating continuing care retirement communities (CCRCs) completed a questionnaire surveying features of implementation experience such as problems encountered with the scope of regulation, the appropriateness of oversight placement, the adequacy of staff and financial resources, the use of discretionary agency authority, and attitudes toward various changes in applicable state law. These findings have relevance for consumers, legislators, lobbyists, and professionals working to make CCRCs a responsible long-term care alternative.

Psychogenic amnesia

Psychogenic amnesia is a psychiatric disorder characterized by sudden loss of memory in the absence of organic lesion or disease. The disorder most frequently occurs in association with a severe stressor, such as a natural disaster or military conflict. To facilitate effective treatment and an accurate prognosis, psychogenic amnesia must be differentiated from amnesia of structural or pharmacologic origin. Treatment may involve supportive psychotherapy, behavioral modification or pharmacotherapy. Prognosis for complete recovery is generally good.

Analysis of conformational parameters in nucleic acid fragments. IV. Intercalating drug complexes of very short chain oligonucleotides

Studies have been made of base-pairing conformational parameters in single crystal structures of very short chain oligonucleotide structures complexed with drug molecules, using data extracted from the Cambridge structural database. The planar portion of the drug has a tendency to intercalate between two bases, utilising strong stacking interactions to stabilise the configuration. The effect of the existence of a formative backbone is seen in the high occurrence of standard base-pairing schemes and a consistent C1'-C1' separation, although the choice of compounds studied does tend to emphasise complementary pairing. In addition to the modulation of the general magnitude which is reduced from that in uncomplexed oligonucleotides, there appears to be some correlation of propeller twist value with the presence of planar groups sandwiching a base-pair. The average twist in such sandwiched pairs is lower than in any other group studied to date.

Analysis of conformational parameters in nucleic acid fragments. III. Very short chain oligonucleotides. The effect of base stacking

Studies have been made of conformational parameters in single crystal structures of very short chain oligonucleotides consisting of strands with lengths in the range 2-3 bases. Using published data extracted from the Cambridge structural database for 20 such structures, a total of 14 base-pairs were found, of which 10 were hetero-pairs and 4 homo-pairs. Subjecting these to analysis to examine hydrogen bond parameters, propeller twist, buckle and C1'-C1' separation revealed an average propeller twist of 11.6 degrees, with no dependence of this parameter on hydrogen bonding details. In addition, an analysis of base stacking showed there to be no correlation between in-plane geometry and degree of inter-plane overlap.

State screening for metabolic disorders in newborns

Most states have mandatory screening programs for congenital and inherited disorders of metabolism. Physicians may be unaware of their state's requirements, and compiled lists of testing requirements are generally unavailable or incomplete. All states test for congenital hypothyroidism and phenylketonuria. Some states require that newborns be tested for up to six other specific congenital and inherited disorders of metabolism. Some states base their decision to test on demographic data, but there is no uniformity in the tests.

Analysis of conformational parameters in nucleic acid fragments. II. Co-crystal complexes of nucleic acid bases

Studies have been made of conformational parameters in co-crystal complexes and compounds of nucleic acid bases in which there is the possibility of formation of hetero-base-pairs. Using published data extracted from the Cambridge structural database, a total of 37 base-pairs were found, of which 25 were hetero-pairs and 12 homo-pairs. These base-pairs were subject to analysis to reveal hydrogen bond parameters, propeller twist, buckle and C1'-C1' separation (or a similar parameter if C1' atoms were not present). Hetero-pairs were found to show larger twists than homo-pairs, the magnitude of twist being unrelated to hydrogen bond parameters or buckle value. The propeller twisting is less pronounced in these nucleic acid bases than in nucleosides, but still has a significant magnitude. Propeller twisting in hetero-pairs is found to be larger than in homo-pairs. Hetero-pairs appear to be formed preferentially in competitive situations.

Analysis of conformational parameters in nucleic acid fragments. I. Single crystals of nucleosides and nucleotides

A study has been undertaken of conformational parameters in single crystal structures of nucleosides and nucleotides using the techniques of helical conformational analysis. A "quasi-helix" was generated from the geometry of base-paired structures, using published data extracted from the Cambridge structural database. A total of 54 base-pairs were found in these structures, for each of which were calculated hydrogen bond parameters, propeller twist, buckle and C1'-C1' separations. These were analysed according to various classifications. Propeller twists are found to show a wide range of values and the magnitude of twist appears to be unrelated to hydrogen bond parameters or C1'-C1' separation. The values of the buckle parameter vary over a smaller range of values and are unrelated to propeller twist magnitude. There is found to be a greater tendency to form homo-base-pairs among compounds containing adenine bases.

Physiological responses of college students to a pet

The effect of a pet on cardiovascular responses of college students was examined under three test conditions (i.e., reading aloud, reading quietly, and interacting with an unknown dog). A repeated-measures analysis with three covariates was used to examine the effect of the treatment on each of six dependent variables (systolic blood pressure, diastolic blood pressure, mean arterial pressure, heart rate, and State and Trait Anxiety). Reading aloud differed from baseline measures under all treatment conditions (p less than .001) Reading quietly and interacting with a pet were slightly below baseline for all dependent variables with a slightly greater effect by reading quietly than interacting with a pet. Examination of interactions between variables revealed no significant differences. Effects on State anxiety level mirrored cardiovascular responses (p less than .001). Trait anxiety levels remained relatively constant throughout the treatments. Results indicated that interacting with a pet does affect physiological and psychological responses by lowering response levels. A parallel effect was also demonstrated by reading quietly. Given the effect of pet interaction upon selected indicators of health in well college students, these data suggest the relevance of examining this treatment with an "at-risk" group.

Comparison of self and health professionals' ratings of the health of community-based elderly

Perceptions of 269 community-based elderly persons and eighty health-care professionals were compared for opinions related to the health-care needs of the elderly, and major barriers faced by the elderly to the utilization of health services. The data indicate a high degree of incongruence between the perceptions of the elderly and those of the professionals. Health professionals were not good predictors of the health status of the elderly, and they did not accurately predict the barriers faced by the elderly seeking health care. Congruence of responses was found only related to the cost of health services. Reasons for these differences were explored, and recommendations for future program planning were made.

The interaction of antibody/DNA immune complexes with complement. Influence of antibody class and DNA conformation

In 28 serum and plasma samples from patients with systemic lupus erythematosus, we examined the importance of antibody class with respect to complement-mediated binding to human red blood cells (RBC) of antibody/DNA immune complexes (IC) prepared with anti-DNA antibodies. We used both 3H-double-stranded DNA and 3H-single-stranded DNA (ssDNA). Generally, double-stranded DNA IC showed considerably higher binding than did ssDNA IC in the RBC binding assay. Further analysis indicated that although ssDNA IC fix complement, it is necessary that these IC contain IgM anti-DNA antibodies in order for them to bind to RBC. The results suggest that the mechanisms of clearance and pathogenic potential of these IC may depend upon both the DNA conformation and antibody class. In particular, complement-fixing IC which contain IgG anti-DNA antibodies and ssDNA may not be cleared via the erythrocyte clearance mechanism, and therefore, could be more likely to deposit in certain tissues and initiate inflammatory reactions.

Ethical issues in long-term care for the elderly

During the past 20 years there has been a wealth of literature on various aspects of ethical decision-making. The ethical dilemmas which confront health professionals become more and more complex as knowledge and technology expand. Professionals have more and more effect on human lives. As research provides professionals with more intervention tools, questions arise about "quality of life" and "who has the right to make life and death decisions." This paper examines the potential for ethical difficulties in long-term care settings for the elderly. Given the necessity for a multidisciplinary approach to geriatric care, a variety of professionals are involved in the delivery of services in multiple settings. For the purpose of this paper, these professionals are referred to as "health professionals" since we are defining health as physical, mental, and social well-being. Case examples will be used to illustrate potential issues when health professionals intervene with elderly persons who are in difficult situations. To provide a context, five codes of ethics (ie, health educators, social workers, physicians, clinical psychologists and nurses) will be examined. Each of these health profesionals is involved in service provision to an elderly client/patient or his family in the area of long-term care. These codes will be examined in light of their historic roots.

Companion animals and the elderly: a state-of-the-art summary

The human/animal relationship exhibited by the elderly and their pets has limitations as well as potentials. The functions of a pet as a companion and social facilitator in pet-facilitated psychotherapy include serving as a cotherapist for facilitation of rapport, providing companionship, substituting for close interpersonal relationships (ie, significant others), enhancing the health status of a variety of target groups, increasing opportunity for sensory stimulation, and providing emotional support and a sense of well-being. Available information was limited because few studies have been replicated, data were not validated, and previous studies were restricted mainly to institutionalized or therapeutic environments. Implications for future research include use of animals for companionship and to promote the physical, social, and emotional health of the elderly.

Chlorpromazine effects upon rabbit lens water and electrolyte balance

Chlorpromazine (CPZ) concentrations of 5 x 10(-5)M or greater were found to disrupt lens electrolyte and water balance significantly. Lens sodium and calcium levels increased while potassium decreased. These changes were accompanied by water accumulation. Such effects of CPZ were not dependent upon exposure to ultraviolet light. Electrical measurements revealed that CPZ induced depolarization of the lens potential but little change of overall lens conductance. 86Rb efflux from the lens was unaltered by a 1 hr exposure to CPZ. The active sodium pump in the lens was inhibited by CPZ, as evidenced by a reduction in Na- K-ATPase activity.

Human triploidy: relationship between parental origin of the additional haploid complement and development of partial hydatidiform mole

One hundred and six triploids were ascertained during a study of 1500 consecutive spontaneous abortions. The mechanism of origin of the additional haploid complement was investigated by comparing parental and foetal cytogenetic heteromorphisms and a histopathological examination of each triploid was done in a subsequent blind study. The mechanism of origin of the additional haploid complement was found to be highly correlated with the development of partial hydatidiform mole and with gestational age. All 51 paternally derived triploids in which a pathologic diagnosis could be made were partial moles, whereas only 3 of 15 maternally derived triploids on which a diagnosis could be made were molar. The mean gestational age of the paternally derived triploids was 122 days while that of the maternally derived triploids was only 74 days. It was suggested that the development of partial mole was primarily associated with the presence of two paternal haploid chromosome complements, the association with relatively long gestational ages being a secondary one consequent upon retention of the molar placentae for many weeks after foetal demise.

Complete and partial hydatidiform mole in Hawaii: cytogenetics, morphology and epidemiology

The results of a 5 year prospective cytogenetic and epidemiologic investigation of complete and partial hydatidiform mole are described. A total of 40 complete and 88 partial moles were identified by pathologic criteria in a population of 1602 spontaneous abortions. Cytogenetic observations confirmed the close correlation between chromosome constitution and histopathologic type, virtually all the complete moles were paternal parthenogenones and virtually all the partial moles were triploid. The distributions of maternal age, race, place of birth and socioeconomic status were the same in women with partial moles and in the control population of spontaneous abortions. However, the incidence of complete moles was significantly increased in women aged less than 20 years and also in Filipino women, these two effects being independent of one another.

Hyperactive and aggressive behaviors in childhood: intertwined dimensions

The relationship between aggression and hyperactivity is unclear in childhood hyperkinesis. To examine the relationship between the two dimensions, a sample of 109 first-, second-, and third-grade children who were rated as hyperactive were evaluated daily by their teachers for 12 consecutive school days on the Daily Behavior Checklist. Daily recordings were made on a total of 22 specific behaviors, 11 physically or verbally aggressive acts, and 11 acts of a restless or hyperactive nature. The Conners hyperactivity score correlated .47 with daily aggression and .49 with daily hyperactivity. A subgroup of hyperactive children who exhibited both hyperactive and aggressive behaviors at rates greater than 98% of their classmates was selected. These children were rated significantly higher on the Conners scale than on alternate subgroup of hyperactive children who showed high rates of hyperactive but not aggressive behaviors. In view of heavy reliance on teacher ratings with the Conners scale in studies of hyperactivity, careful consideration of the potential confounding of hyperactivity and aggression is recommended. Implications for classification, longitudinal investigation, and evaluation of treatment of hyperactive children were discussed.