Investigating the Relationship Between Marital Status and Ethnicity on Neurocognitive Functioning in a Rural Older Population: A Project FRONTIER Study

OBJECTIVES

Research indicates being married is related to better physical and psychological health. Little is known regarding the relationship between marital status and neurocognitive functioning and whether it differs based on ethnicity (Hispanic vs non-Hispanic). This is the first study to examine this relationship in a sample of aging adults in rural Texas.

METHODS

Data from 1,864 participants (Mage = 59.68, standard deviation [SD]age = 12.21), who were mostly Hispanic (n = 1,053), women (n = 1,295), and married (n = 1,125) from Project Facing Rural Obstacles to Healthcare Now Through Intervention, Education, & Research were analyzed. Neuropsychological testing comprised Repeatable Battery for the Assessment of Neuropsychological Status, Trails Making Test, and Clock Drawing. Participants were dichotomized, married, and unmarried.

RESULTS

There was a significant interaction between Hispanic identity and marital status on overall neurocognitive functioning (F(1, 1,480) = 4.79, p < .05, ηp2 = 0.003). For non-Hispanic individuals, married individuals had higher overall neurocognitive functioning compared to unmarried individuals, whereas neurocognitive functioning for Hispanic individuals did not significantly differ between married and unmarried individuals. There were significant main effects as married individuals (M = 84.95, SD = 15.56) had greater overall neurocognitive functioning than unmarried individuals (M = 83.47, SD = 15.86; F(1, 1,480) = 14.67, p < .001, ηp2 = 0.01), Hispanic individuals (M = 78.02, SD = 14.25) had lower overall neurocognitive functioning than non-Hispanic individuals (M = 91.43, SD = 15.07; F(1, 1,480) = 284.99, p < .001, ηp2 = 0.16).

DISCUSSION

Hispanics living in rural areas experience additional stressors that could lead to worse neurocognitive functioning, which is supported by the Lifespan Biopsychosocial Model of Cumulative Vulnerability and Minority Health, which postulates that race/ethnicity/socioeconomic-status-related stressors exacerbate the impact of other life stressors. Reduction of stress on rural Hispanics should be a priority as it could positively affect their neurocognitive functioning.

Pandemic grief risk factors and prolonged grief disorder in bereaved young adults during COVID-19

OBJECTIVES

This study evaluated whether COVID-19-specific risk factors (e.g., feeling guilty for not being present with the deceased at the time of the loss and feeling emotionally distant from the deceased prior to the loss) were associated with prolonged grief disorder (PGD) symptomatology or diagnosis among young adults bereaved due to any cause (e.g., illness and violent loss).

METHODS

We surveyed 196 young adults who had a family member/close friend die during the COVID-19 pandemic. Participants completed the PGD-12 Questionnaire and the 10-item Pandemic Grief Risk Factors (PGRF) Questionnaire.

RESULTS

More time spent with the deceased before the loss and greater endorsement of pandemic grief risk factors were associated with increased PGD symptoms and a greater likelihood of meeting the diagnostic criteria for PGD.

SIGNIFICANCE OF RESULTS

The COVID-19 pandemic created unique risk factors that affected the grieving process for bereaved individuals, regardless of whether the death was related to COVID-19 infection. These findings add to a growing body of literature examining grief and loss within the unique context of the COVID-19 pandemic and suggest that there may be detrimental long-term psychological outcomes for these bereaved individuals, regardless of the cause of death. Routine screening for these unique risk factors in medical and psychological clinics is warranted to help identify those individuals who could benefit from early intervention. Also, it will be important to understand and possibly modify evidence-based interventions and prevention programs to directly address the identified unique PGRF.

Perceptions of grief reactions in family members of incarcerated individuals: A vignette-based experiment

We examined perceptions of individuals grieving the loss of a family member to incarceration. Participants (N = 1095) were randomized to a vignette that varied by race-ethnicity, crime type, and grief trajectory to assess their perceptions. Results indicated: (1) participants perceived prolonged grief as less appropriate than resilience; (2) Black family members grieving someone who committed a violent crime as more appropriate compared to White family members; and (3) women endorsed both grief trajectories as more appropriate and indicated greater comfort supporting the family member. Lastly, participants indicated prolonged, White and Latinx grievers should seek therapy more than resilient or Black individuals.

Understanding Online Registry Facilitators and Barriers Experienced by Black Brain Health Registry Participants: The Community Engaged Digital Alzheimer's Research (CEDAR) Study

BACKGROUND

Failure of Alzheimer's disease and related diseases (ADRD) research studies to include and engage Black participants is a major issue, which limits the impact and generalizability of research findings. Little is known about participation of Black adults in online ADRD-related research registries.

OBJECTIVES

As part of the Community Engaged Digital Alzheimer's Research (CEDAR) Study, this study aims to increase our understanding of facilitators and barriers of Black adults to participating in ADRD-related online registries, as well as to understand their preferences for communication channels.

DESIGN, SETTING, PARTICIPANTS, MEASUREMENTS

We invited all Black participants enrolled in the Brain Health Registry (BHR) to complete a cross-sectional online survey. The survey consisted of rating scales and open-text questions asking about their attitudes towards brain health research, reasons for joining and continuing to participate in BHR, difficulties with participating, and preferences for modes of contact and website usage.

RESULTS

Of all invited Black BHR participants (N=3,636), 198 (5.5%) completed the survey. The mean age was 58.4 (SD=11.3), mean years of education were 16.3 (SD=2.4), and 85.5% identified as female. Reported facilitators for joining and continuing to participate in BHR were personal interest (e.g., learning more about own brain health) and altruism (e.g., helping research). Among additional registry features which could encourage return, receiving feedback or scores about BHR tasks was rated the highest. Of those who found BHR participation difficult (21%), the most frequent reason was time burden. The most preferred way of receiving study information was via email. Participants reported that the websites that they used the most were YouTube and Facebook.

DISCUSSION

The results of our study can inform the development of culturally-responsive registry features and engagement efforts to improve inclusion and participation of Black adults in online ADRD research. Providing participants with feedback about their registry performance and reducing the number of registry tasks are among the recommended strategies.

An evaluation of common risk factors for prolonged grief disorder using the international classification of diseases-11 criteria

OBJECTIVES

Inclusion of Prolonged Grief Disorder (PGD) in the ICD-11 warrants examination of risk factors using diagnostic criteria as there is a paucity of research that has examined risk factors of PGD using the diagnostic criteria. This study examines if the identified risk factors for prolonged grief predict PGD using the diagnostic criteria across three samples.

METHODS

A cross-sectional survey design was used to assess risk factors and PG-13 in three distinct samples of bereaved adults. The PG-13 was either parsed dichotomously using the ICD-11 diagnostic criteria to indicate presence of PGD or summed to index general grief severity.Results: When using ICD-11 diagnostic criteria, only female gender and high levels of pre-loss contact were identified in separate samples as increasing risk of diagnosis. The most replicable results across samples were found when using the summed PG-13 symptom scores. When using the PG-13 total score, younger age and more pre-loss contact with the deceased were associated with higher symptom levels, which replicated in all three studies.Conclusions: This study provided evidence that the extant literature using summed scores to explore risk factors might not generalize to the ICD-11 diagnostic criteria.

Use of medical aid in dying by individuals with cancer at a comprehensive cancer center

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Background: Understanding the experience of individuals with cancer (pts) who utilize Medical Aid in Dying (MAID) is important given growing access and limited research in the U.S. Methods: Chart review from January 1, 2014-October 1, 2020, of all pts who inquired (but did not initiate completion of all legal requirements), initiated (but did not complete all legal requirements to obtain access to the medications), or completed all legal requirements and could have had access to medications (whether or not they were obtained or used) at Seattle Cancer Care Alliance/University of Washington. Chi-square tests were used to compare differences in pt characteristics between the inquired/initiated versus completed group. Results: Of 498 total pts, 116 (23.3%) inquired, 127 (25.5%) initiated, and 255 (51.2%) completed the MAID process, of which, 45.9% (117/255) were known to have used the medications. At time of first inquiry (FI), mean age was 66 years (standard deviation [SD] = 11.9)/median 67.3/range 22-94; 206 (41.4%) were female; and 40 (8.0%) were non-white, while 11 (2.2%) were Hispanic/Latino and 14 (2.8%) were non-English speaking. At FI, 292 (58.6%) pts were married or had a significant other; 152 (30.5%) had a religious affiliation; 23 (4.6%) were uninsured; and 282 (56.6%) had Medicare. Mean months from the original cancer diagnosis and FI was 36.5 (SD = 50.3, range 0.1-366.1). 461 (92.6%) pts had solid/central nervous system (CNS) tumors, of which 231 (46.4%) had presented with metastatic disease. At FI, 84 (16.9%) were currently hospitalized; in total, 236 (47.4%) pts had been hospitalized within the 3 months prior to FI. A total of 71.9% (358/498) had not yet initiated hospice at FI; 51.8% (258/498) had evidence of advance care planning (ACP), including 41.5% (107/258) with a Physician Order for Life Sustaining Treatment on file. Overall, 152 (30.5%) and 166 (33.3%) of pts had seen social work or palliative care in the 30 days prior to FI, while 62 (12.4%) had met with a spiritual health clinician. Statistically significant differences were found between those who inquired/initiated versus completed with the following pt characteristics: non-white (ꭓ2= 6.596, p = .010); Medicaid versus all other insured (ꭓ2= 9.489, p = .002); those hospitalized at FI (ꭓ2= 6.101, p = .014); and those without evidence of ACP (ꭓ2= 17.090, p < .001). Pts with a hematologic malignancy (HM, n = 37/498, 7.4%) were less likely to complete the MAID process compared to pts with solid/CNS tumors (ꭓ2= 7.378, p = .007); 43.2% (16/37) of HM pts did not complete due to rapid decline. Conclusions: Less than half of pts who initially inquired about MAID completed the process. Recent hospitalizations and evidence of ACP were relatively common compared to current utilization of hospice or prior use of supportive care services. Future research should investigate why non-white pts, those with Medicaid and those with HM may be less likely to complete the MAID process.

An examination and proposed definitions of family members' grief prior to the death of individuals with a life-limiting illness: A systematic review

BACKGROUND

Research has extensively examined family members' grief prior to the death of an individual with a life-limiting illness but several inconsistencies in its conceptualization of related constructs, yet significant conceptualization issues exist.

AIM

This study aimed to identify and characterize studies published on family members grief before the death of an individual with a life-limiting illness, and propose definitions based on past studies in order to initiate conceptual clarity.

DESIGN

A mixed-method systematic review utilized six databases and was last conducted July 10, 2021. The search strategy was developed using Medical Subject Headings. This study was prospectively registered on PROSPERO (CRD42020166254).

RESULTS

One hundred thirty-four full-text articles met inclusion criteria. This review revealed across studies a wide variation in terminology, conceptualization, and characterization of grief before the death. More than 18 terms and 30 definitions have been used. In many cases, the same term (e.g. anticipatory grief) was defined differently across studies.

CONCLUSIONS

We found grief occurring before the death of a person with a life-limiting illness, which we termed pre-death grief, is comprised of two distinct constructs: anticipatory grief and illness-related grief. Anticipatory grief is future-oriented and is characterized by separation distress and worry about a future without the person with the life-limiting illness being physically present. Illness-related grief is present-oriented and is characterized by grief over current and ongoing losses experienced during the illness trajectory. These definitions provide the field with uniform constructs to advance the study of grief before the death of an individual with a life-limiting illness.

Perception of grief responses: Are maladaptive grief responses and the stages of grief considered normal?

Literature indicates laypeople hold strong opinions about how persons should grieve. This study examined how individuals perceive normal grief. Participants across two distinct samples (Study 1: N = 510 via MTurk; Study 2: N = 210 via Qualtrics panels) completed the Perception of Grief Scale and Grief Expectations Questionnaire. Findings indicated participants endorsed maladaptive grief responses as normal relative to other responses to loss. Endorsement of maladaptive grief responses as normal predicted endorsement of grief work beliefs. If social expectations deem maladaptive grief to be normal, as this study suggests, bereaved individuals might implicitly push themselves to grieve maladaptively.

Gene expression profiling of endobronchial ultrasound (EBUS)-derived cytological fine needle aspirates from hilar and mediastinal lymph nodes in non-small cell lung cancer

OBJECTIVE

  Endobronchial ultrasound (EBUS) allows minimally invasive sampling of hilar and mediastinal lymph nodes and has an established role in non-small cell lung cancer (NSCLC) diagnosis and staging. Molecular biomarkers are being explored increasingly in lung cancer research. Gene expression profiling (GEP) is a microarray-based technology that comprehensively assesses genome-wide changes in gene expression that can provide tumour-specific molecular signatures with the potential to predict prognosis and treatment responsiveness. We assessed the feasibility of using EBUS-derived aspirates from benign and tumour-infiltrated lymph nodes for GEP.

METHODS

  RNA was extracted from EBUS-directed transbronchial fine needle aspiration samples in routine clinical practice. GEP was subsequently performed in six patients with NSCLC, three of whom had tumour-infiltrated nodes and three who had benign lymph nodes; the differences in gene expression were then compared.

RESULTS

RNA was successfully extracted in 29 of 32 patients, 12 of whom were diagnosed with NSCLC. RNA yield (median, 12.1 μg) and RNA integrity (median, 6.3) were sufficient after amplification for GEP. Benign and malignant nodes in adenocarcinoma were discriminated by principal component analysis and hierarchical clustering with different expression patterns between malignant and benign nodes.

CONCLUSION

We have demonstrated the feasibility of RNA extraction and GEP on EBUS-derived transbronchial fine needle aspirates from benign and tumour-infiltrated lymph nodes in patients with known NSCLC in routine clinical practice. Further studies on larger patient cohorts are required to identify expression profiles that robustly differentiate benign from malignant lymph nodes in NSCLC.

Morphological development of larval cobia Rachycentron canadum and the influence of dietary taurine supplementation

The morphological development of larval cobia Rachycentron canadum from 3 days post hatch (dph) until weaning (27 dph) was examined using S.E.M. Two groups of fish were studied: a control group (CF), reared under standard feeding protocol, and a group in which prey items were enriched with supplemental taurine (4 g l(-1) day(-1) ; TF). TF fish grew faster (P < 0·001), attained greater size (mean ±s.e. 55·1 ± 1·5 v. 33·9 ± 1·0 mm total length) and had better survival (mean ±s.e. 29·3 ± 0·4 v. 7·1 ± 1·2 %) than CF fish. Canonical variance analysis confirmed findings with respect to differences in growth between the treatment groups with separation being explained by two cranial measurements. S.E.M. revealed that 3 dph larvae of R. canadum (in both groups) possess preopercular spines, superficial neuromasts on the head and body, taste buds in the mouth, an olfactory epithelium which takes the form of simple concave depressions, and primordial gill arches. Gill filaments start to form as early as 6 dph and lamellae buds are visible at 8 dph in both groups. In CF fish, the cephalic lateral line system continues its development at 12-14 dph with invagination of both supra- and infraorbital canals. At the same time, a thorn-like or acanthoid crest forms above the eye. At 14 dph, invaginations of the mandibular and preopercular canals are visible and around 22 dph enclosure of all cranial canals nears completion. In CF larvae, however, completely enclosed cranial canals were not observed within the course of the trial, i.e. 27 dph. In TF larvae, grooves of the cephalic lateral line system form 4 days earlier than observed in CF larvae of R. canadum (i.e. at 8 dph), with enclosure commencing at 16 dph, and completed by 27 dph. Along the flanks of 6 dph larvae of either treatment, four to five equally spaced neuromasts delineate the future position of the trunk lateral line. As myomeres are added to the growing larvae, new neuromasts appear such that at 16 dph a neuromast is associated with each myomere. By 27 dph, the trunk lateral line starts to invaginate in CF larvae, while it initiates closure in TF larvae. These findings elucidate important features of the larval development of R. canadum and show that dietary taurine supplementation benefits larval development, growth and survival in this species. Moreover, they suggest a conditional requirement for taurine in larval R. canadum.

Virological analysis of fatal influenza cases in the United Kingdom during the early wave of influenza in winter 2010/11

The 2010/11 winter influenza season is underway in the United Kingdom, with co-circulation of influenza A(H1N1)2009 (antigenically similar to the current 2010/11 vaccine strain), influenza B (mainly B/Victoria/2/87 lineage, similar to the 2010/11 vaccine strain) and a few sporadic influenza A(H3N2) viruses. Clinical influenza activity has been increasing. Severe illness, resulting in hospitalisation and deaths, has occurred in children and young adults and has predominantly been associated with influenza A(H1N1)2009, but also influenza B viruses.

Virological analysis of fatal influenza cases in the United Kingdom during the early wave of influenza in winter 2010/11

The 2010/11 winter influenza season is underway in the United Kingdom, with co-circulation of influenza A(H1N1)2009 (antigenically similar to the current 2010/11 vaccine strain), influenza B (mainly B/Victoria/2/87 lineage, similar to the 2010/11 vaccine strain) and a few sporadic influenza A(H3N2) viruses. Clinical influenza activity has been increasing. Severe illness, resulting in hospitalisation and deaths, has occurred in children and young adults and has predominantly been associated with influenza A(H1N1)2009, but also influenza B viruses.

Pandemic Influenza A (H1N1) 2009 and mortality in the United Kingdom: risk factors for death, April 2009 to March 2010

Binary file ES_Abstracts_Final_ECDC.txt matches

Pandemic Influenza A (H1N1) 2009 and mortality in the United Kingdom: risk factors for death, April 2009 to March 2010

This paper describes the epidemiology of fatal pandemic influenza A(H1N1) cases in the United Kingdom (UK) since April 2009 and in particular risk factors associated with death. A fatal case was defined as a UK resident who died between 27 April 2009 and 12 March 2010, in whom pandemic influenza A(H1N1) infection was confirmed by laboratory or recorded on death certificate. Case fatality ratios (CFR) were calculated using the estimated cumulative number of clinical cases as the denominator. The relative risk of death was estimated by comparing the population mortality rate in each risk group, with those not in a risk group. Across the UK, 440 fatal cases were identified. In England, fatal cases were mainly seen in young adults (median age 43 years, 85% under 65 years), unlike for seasonal influenza. The majority (77%) of cases for whom data were available (n=308) had underlying risk factors for severe disease. The CFR in those aged 65 years or over was nine per 1,000 (range 3 - 26) compared to 0.4 (range 0.2 to 0.9) for those aged six months to 64 years. In the age group between six month and 64 years, the relative risk for fatal illness for those in a risk group was 18. The population attributable fractions in this age group were highest for chronic neurological disease (24%), immunosuppression (16%) and respiratory disease (15%). The results highlight the importance of early targeted effective intervention programmes.

[Conclusions and recommendations of a WHO expert consultation meeting on iron supplementation for infants and young children in malaria endemic areas]

This article presents the results of an expert consultation meeting aimed at evaluating the safety and public health implications of administering supplemental iron to infants and young children in malaria-endemic areas. Participants at this meeting that took place in Lyon, France on June 12-14, 2006 reached consensus on several important issues related to iron supplementation for infants and young children in malaria-endemic areas. The conclusions in this report apply specifically to regions where malaria is endemic.

Replacement of fish meal in cobia (Rachycentron canadum) diets using an organically certified protein

A six-week feeding trial was conducted to evaluate the use of a yeast-based, certified organic protein source as a replacement for fish meal in diets for cobia. Five experimental diets were formulated to provide 40% crude protein and 11% dietary lipid (dry matter basis) with the yeast-based protein source replacing Special Select® menhaden fish meal at 25%, 50%, 75% and 100% of dietary protein. Ten juvenile cobia (initial weight 11.5 g/fish) were randomly stocked in triplicate 300 l circular fiberglass tanks (n = 30 treatment^- 1) and hand-fed the diets based upon total tank biomass two times daily at 0900 and 1400 h. Fish were group weighed weekly to monitor performance and adjust feeding rations. Water temperature and salinity were maintained at 27 °C and 15‰, respectively. At the end of the feeding trial, weight gain, ranging from 86% to 512%, and feed conversion ratio values, ranging from 1.9 to 5.8, were significantly affected by the inclusion of the yeast-based protein source, with decreasing values as inclusion levels of the yeast-based protein source rose above 25% of dietary protein. Cobia fed the diet containing 25% of dietary protein from the yeast-based protein source had equal weight gain and feed conversion ratio values as fish fed the control diet composed of 100% fish meal (503 vs. 512 and 1.9 vs. 1.9, respectively). Biological indices including hepatosomatic index, visceral somatic index and muscle ratio were all similarly affected by inclusion of the yeast-based protein source, with significant impacts when inclusion levels rose above 25% of dietary protein. As with the weight gain and feed efficiency ratio values, fish fed the diet containing 25% of protein from the yeast-based source had similar values as those observed in the control animals. This study represents the first attempt to utilize an organically certified protein source as a replacement for fish meal in diets for juvenile cobia. Although levels of inclusion of the yeast-based protein source above 50% of dietary protein resulted in detrimental effects on production characteristics, the data clearly suggest that, at a minimum, 25% of dietary protein can be provided by this yeast-based protein in diets for cobia.

Criteria for disposable brush tips for use in dentistry

PURPOSE

The purpose of this paper is to document criteria considered appropriate for disposable brush tips used to apply agents in liquid and gel form and to carry out an assessment of examples of brush tips supplied by manufacturers of dental materials.

MATERIALS AND METHODS

Three brush tips were selected at random from sixteen packs of dental materials and one dedicated pack of brushes, and examined under 4X magnification. The brush tips were assessed with regard to criteria such as cost, flexibility, shape, size, etc to determine, in particular, whether any correlation existed between brush tip characteristics and the type (i.e., fluid or gel) and thickness of agent to be applied.

RESULTS

When assessed with regard to the ideal criteria, no correlation was apparent between brush tip features and the type and thickness of agent to be applied.

CONCLUSION

It is suggested that brush tip effectiveness may be found to be dependent upon the correct choice of tip shape, length, and size for each particular function, and that operators and manufacturers alike should choose the brush tip considered most suitable for any given application. Before application of a given material, clinicians should select the brush tip to be used to ensure that the appropriate amount of material will be applied in the intended thickness.

Vibriosis in rainbow trout cultured in the Krka estuary, Croatia: occurrence and comments

The frequency of vibriosis in cultured rainbow trout, maintained under different rearing conditions in the Krka estuary, was examined over a 6 yr period. Annual studies commenced regularly in October and ended in June of the following year. Every month during study periods, 37-75 trouts were randomly taken from each of 4 farm sites for routine examination. Twenty fish from these samples were subsequently employed for bacteriological analyses. Based on morphological and biochemical properties, the bacterial isolates were identified as Vibrio anguillarum, (biotype I). The findings demonstrate high occurrence of vibriosis in trout cultivated in the Krka estuary. Furthermore, there was a direct relationship between water quality parameters and the severity of vibriosis epizootics. Moreover, the causative agent has been isolated from free-living species, fish, notably eel and mullet, which are abundant to the Krka aquatorium. The findings from these long-term studies will be considered with reference to the developing salmon farming industry of Croatia.

Increases in gill cytosolic corticosteroid receptor abundance and saltwater tolerance in juvenile coho salmon (Oncorhynchus kisutch) treated with growth hormone and placental lactogen

Juvenile coho salmon (Oncorhynchus kisutch) were injected with one of two recombinant bovine hormones, growth hormone (bGH; 5.0 and 0.5 micrograms.g-1 body wt) or placental lactogen (bPL; 5.0, 0.5, and 0.05 micrograms.g-1 body wt) to determine the effect on growth, plasma cortisol concentration, cytosolic corticosteroid receptors (CR) in the gills, and the development of hypoosmoregulatory ability. One week following a single injection or six weekly injections of bGH or bPL, the fish were measured and sampled for CR concentration and Na+,K(+)-ATPase activity in the gills. Fish were also challenged with salt water (salinity 25%) for 24 hr to determine saltwater tolerance at the end of the 6-week treatment. Treatment with bPL and bGH significantly increased weight and length of the fish. The 0.05-micrograms bPL dose significantly elevated plasma cortisol concentration, whereas all other hormone treatments did not affect cortisol levels. bPL and bGH also significantly increased CR concentration and Na+,K(+)-ATPase activity in the gills. The perturbation in plasma sodium concentration was least in animals receiving the highest dose of bPL and the bGH-treated animals following transfer to seawater. An increase in cytosolic CR by bGH and bPL may increase responsiveness of the gills to cortisol and partially account for the increase in Na+,K(+)-ATPase activity and greater ability to regulate plasma sodium in seawater as exhibited by the experimental groups.

A radioimmunoassay for oncorhynchid growth hormone targeted to the physiological range

This study describes the development of an oncorhynchid growth hormone (GH) radioimmunoassay using recombinant chum salmon GH (rsGH) and a rabbit antiserum (TJK-1) raised against this recombinant material. The assay was designed to measure the wide range of circulating immunoreactive GH (IRGH) levels in Pacific salmonids, resulting in a standard curve capable of accurately determining plasma levels of IRGH from 0.5 to 250 ng/mL without dilution. The assay ED50 and ED90 values averaged 13.1 and 0.5 ng/mL, respectively. This radioimmunoassay specifically recognizes oncorhynchid IRGH, showing no cross-reactivity with recombinant porcine and bovine GH, or natural chum salmon prolactin at concentrations up to 10 micrograms/mL. Curves approximately parallel to the standard curve were obtained with purified natural coho salmon GH and plasma from chinook salmon. Recovery of rsGH from plasma was complete over the full range of the standard curve. Intra- and inter-assay coefficients of variation were 6.0 and 12.9%, respectively. Plasma IRGH levels in fed coho salmon were 30.6 +/- 5.3 ng/mL, while those in fish starved for 2 weeks were 132.9 +/- 53.9 ng/mL. Starvation for an additional 4 weeks had no significant effect. Plasma IRGH levels in control rainbow trout injected with saline were significantly higher 45 min post-injection. In contrast, fish injected with recombinant porcine GH exhibited no elevation in IRGH. It is speculated that exogenous GH inhibits the production of endogenous GH.

Antisomatostatin-induced growth acceleration in chinook salmon (Oncorhynchus tshawytscha)

Since somatostatin (SRIF) inhibits the release of growth hormone (GH), its immunoneutralization may provide an alternative to GH therapy as a means of enhancing somatic growth in fish. The present study examined the feasibility of accelerating growth in juvenile chinook salmon by means of antiSRIF administration. Yearling salmon of Nicola River stock (BC, Canada) were injected intraperitoneally every 5 days, for a total of 40 days, with either SRIF (1 μg g-1 body wt.), antiSRIF (SOMA-10, 1 μg g(-1)), recombinant bovine GH (rbGH, 2.5 μg g(-1)), recombinant porcine GH (rpGH, 2.5 μg g(-1)) or saline (controls). No significant differences were observed in length, weight or final condition factor (k) between the SRIF-treated and control fish over the experimental period. However, the fish treated with the antiSRIF were significantly (p ≤ 0.05) longer and heavier than the control salmon after 25 and 30 days respectively. Furthermore, antiSRIF treatment caused a lowering in k when compared to the control salmon. Fish injected with rbGH or rpGH were significantly longer and heavier than all other groups (p ≤ 0.05), after only 5 days. GH treated groups also returned higher k when compared against all other treatments (p ≤ 0.05). No differences were observed in growth between the two rGH treatments over the experimental period.

Bovine placental lactogen is a potent stimulator of growth and displays strong binding to hepatic receptor sites of coho salmon

Juvenile coho salmon were treated with bovine placental lactogen (bPL) and bovine growth hormone (bGH) to examine the growth promoting activities of these proteins in a lower vertebrate. Fish were intraperitoneally injected either with 0.5 or 5.0 micrograms/g bPL or with 5.0 micrograms/g bGH once a week for 5 weeks. After only a single injection and 1 week of growth, the high dose of bPL stimulated a significant increase in weight and length relative to untreated fish or fish treated with a control protein, bovine serum albumin. At the end of the experiment, all hormone-treated groups were significantly larger than controls. Fish treated with 5 micrograms/g bPL gained more than three times as much weight as controls. The 5.0 micrograms/g bGH group grew at the same rate as fish treated with one-tenth this dose of bPL, indicating that bPL is a potent stimulator of growth in this species. Radioreceptor assays performed on coho salmon liver membrane preparations indicate that bPL binds with approximately 430-fold higher affinity than bGH, and some 8000-fold higher affinity than bovine prolactin. The action of bPL relative to the structure and function of salmonid pituitary hormones is discussed.

Growth enhancement following dietary delivery of recombinant porcine somatotropin to diploid and triploid coho salmon (Oncorhynchus kisutch)

Diploid (2n) and triploid (3n) coho salmon were fed upon control (diet 1), recombinant porcine somatotropin (rpST)-supplemented (diet 2; 20 μg rpST/g body wt/day) or rpST/antacid/detergent-containing feed (diet 3; 20, 100 & 20 μg/g body wt/day respectively) for 16 wk. Fish were weighed and measured bimonthly and their relative performances assessed. By wk 4, 2n and 3n groups fed upon diet 2 were significantly heavier and longer than control 2n fish. At the termination of the trial, diet 3 fed animals were greater in weight than all other treatment groups. Diet 3 salmon also returned better feed conversion efficiencies than either diet 1 or 2 groups. RpST therapy induced a 28.7% and 60.2% increase in group wt for 3n diet 2/3 coho versus (-vs-) controls. Likewise, 2n rpST-treated fish increased wt -vs-2n control coho by 17% and 50% respectively over the same period. No differences were recorded between groups for body moisture, but diet 2, 3n and both diet 3 groups exhibited decreased condition factors when compared to control fish (p ≤ 0.05).

The time-course of appearance and net accumulation of horseradish peroxidase (HRP) presented orally to rainbow trout Salmo gairdneri (Richardson)

1. A sensitive enzyme-linked immunosorbent assay (ELISA) technique was used in order to determine horseradish peroxidase (HRP) uptake from the rainbow trout gut. 2. HRP was detected in blood plasma and various tissues within 15 min of oral intubation. 3. The time-course of net accumulation (uptake-degradation) over a 75 min period was recorded. 4. The presence of HRP reached a maximum in the body tissues approximately 45 min after intubation and on a ng/g weight basis the order of accumulation within the tissues was liver greater than spleen = kidney greater than plasma greater than heart. 5. The total organ accumulation (net) was in the order liver greater than plasma greater than kidney greater than spleen greater than heart.

The time-course of appearance and net accumulation of horseradish peroxidase (HRP) presented orally to juvenile carp Cyprinus carpio (L.)

A sensitive enzyme-linked immunosorbent assay (ELISA) technique was used in order to determine horseradish peroxidase (HRP) uptake from the carp gut. HRP was detected in blood plasma and various tissues within 15 min of oral intubation. The time-course of net accumulation (uptake-degradation) over a 2 hr period was recorded. The presence of HRP reached a maximum in the body tissues approximately 1 hr after intubation and on a microgram/g wet weight basis the order of accumulation within the tissues was spleen greater than kidney greater than liver. The total organ accumulation (net) was in the order liver greater than kidney greater than spleen.

Ward teaching won't do!

Some multiply handicapped children who live in long stay hospitals do not attend school. This survey of alternative arrangements for their education made in Scottish hospitals shows that it is the children with the most severe handicaps who are taught in wards rather than in schools. Yet generally they receive little teaching time, few of their teachers have specialized training, there is limited help from other professionals, and they are taught in rooms less suitable than the most inadequate classroom. No evidence was found of any educational advantages for children being taught in a ward rather than in school.

Plasma lipids and microangiopathy in insulin-dependent diabetes mellitus

The relationship of plasma levels of high density lipoprotein (HDL) cholesterol, apolipoproteins A-I and A-II (the major apolipoproteins in HDL), low density lipoprotein (LDL) cholesterol, triglyceride, and glucose to microangiopathy was evaluated in 49 insulin-dependent diabetic subjects. Although the HDL cholesterol/LDL cholesterol ratio (a risk determinant for macroangiopathy) was lower in women with proteinuria, no other relationships between HDL cholesterol or the A apolipoproteins and renal microangiography were found. The only independent association between HDL and retinal microangiopathy was found in women, where an inverse correlation was found between the apo A-I/apo A-II ratio and the number of microaneurysms (rs = -0.561, P less than 0.05). Men showed strong relationships of glucose, triglyceride, cholesterol, and LDL cholesterol to renal microangiopathy whereas women, in general, had stronger correlations of these variables with retinal microangiopathy. Thus, several alterations in lipoprotein cholesterol distribution and HDL composition are associated with diabetic microangiopathy. In addition, differences between sexes suggest that previously undescribed hormonal factors may influence the severity of this process.

Venous occlusions in the liver following dimethylnitrosamine

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