Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: UMLS:C0019693 (HIV)
 170,526 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

The p2gag peptide (AEAMSQVTNTATIM) processed from HIV-1 Pr55gag by HIV-1 protease was identified as a suicide inhibitor of the enzyme (Ki = 30 microM and IC50 = 10 microM for the synthetic peptide substrate, succinyl-SQNYPIVQ), and potently inhibited the proteolytic cleavage of the viral precursor protein (Pr55gag) into functional structural units (p17gag and p24gag) in vitro. The nonapeptide (AEAMSQVTN) derived from N-terminus of the p2gag peptide exhibits a potent inhibitory action on HIV-1 protease, but the other peptides (AEAMSQ, AEAMSQV, AEAMSQVT, VTN and VTNTATIM) do not. It was determined by exclusion gel chromatography that HIV-1 protease after treatment of the synthetic p2gag peptide dissociated from the active dimeric form to an inactive monomeric form. The p2gag peptide and HIV-1 protease were also detected in HIV-1 viral particles using both matrix-assisted laser desorption/ionization time-of-flight mass spectrometric (MALDI TOF-MS) and western immunoblot analyses. Taken together, these results suggest that the p2gag peptide is the inhibitor of preventing dimerization of HIV-1 protease and that the enzyme activity is completely suicide inhibited with the accumulated p2gag peptide producing by the processing of Pr55gag during viral maturation.
 ...
PMID:The p2gag peptide, AEAMSQVTNTATIM, processed from HIV-1 Pr55gag was found to be a suicide inhibitor of HIV-1 protease. 942 62

This anonymous postal survey explored attitudes and experiences concerning end-of-life decisions. Respondents were English-speaking members of the Canadian Association for Nurses in AIDS Care (CANAC) and other nurses identified as working primarily in HIV/AIDS settings. Seventy-three percent believed that the law should be changed to allow physicians to practice voluntary euthanasia (VE) and assisted suicide (AS). Fifty-three percent indicated that nurses should be allowed to practice VE and AS. Although VE and AS are illegal, fewer than one in five nurses would report a colleague whom they knew to be involved in such acts. More than one in five nurses have received requests from patients to hasten their deaths by VE. Nearly 98% believe that the nursing profession should be involved in policy development concerning VE and AS, and nearly 78% believe that nurses should be involved in the decision-making process with patients if such acts were legal. Given that ethical codes for Canadian nurses promote client self-determination and that nurses are the largest group of care providers for the terminally ill, the profession must promote discussion and research if it is to take a leadership role with respect to end-of-life issues.
 ...
PMID:End-of-life issues: a survey of English-speaking Canadian nurses in AIDS care. 951 31

The causes of death among injecting drug users. (IDUs) are still being discussed worldwide. We analysed the causes of death among IDUs attending 26 centres for drug users in North-Eastern Italy from 1985 to 1994. The study of a total number of 1,022 deaths reveals the following: (1) AIDS has become the primary cause of death among IDUs since 1991 and is rising even in an area with a moderate HIV seroprevalence; (2) the mean age of death in AIDS patients proved higher than among patients who died of other causes (which may be due to the long incubation period of AIDS); (3) our data do not reveal higher HIV seroprevalence among IDUs who died of overdose and suicide as opposed to IDUs who died of other causes; (4) the mortality rate in IDUs is significantly higher when compared to that of the general population in the same age group.
 ...
PMID:A multicentre study on the causes of death among Italian injecting drug users. AIDS has overtaken overdose as the principal cause of death. 953 2

This study describes the health services for incarcerated adolescents in Washington State and their utilization, in 12 juvenile detention facilities statewide, including six state (long-term, postadjudication) and six county (short-term, preadjudication) facilities. Findings differed by facility type, with youth at county facilities having more total visits to emergency rooms and more health care visits per inmate for health problems presenting acutely, such as sexually transmitted disease, pregnancy, urologic problems, and trauma. More were on suicide watch and on psychiatric medication. Health care used by youth at state facilities tended to be for more chronic conditions such as dental, dermatologic, nutritional, and respiratory problems. When utilization was analyzed by size of facility, small facilities had fewer health care visits and fewer nursing hours per inmate. According to our findings, there are at least 14 pregnant adolescents and 2 HIV-infected adolescents incarcerated in this state at any time.
 ...
PMID:Incarcerated adolescents in Washington state. Health services and utilization. 958 36

Kaposi's sarcoma (KS) is the most frequent malignancy occurring in HIV-positive individuals. AIDS-KS is a more aggressive disease than the classical form, frequently having a rapid clinical course with numerous serious complications. Current systemic treatments for KS, such as chemotherapy and the administration of biological modifiers, are complicated by both the drug resistance of the tumor and the dose-limiting toxicity of the reagents. The relative accessibility of many KS lesions makes the disease a particularly attractive candidate for in vivo gene therapy protocols. In this regard, we are interested in delivering conditionally toxic suicide and/or antiangiogenic vectors to accomplish targeted cell death selectively in AIDS-KS cells. To this end, we examined both cationic lipid- and adenoviral-mediated DNA transfection methods. Using the firefly luciferase reporter gene, we optimized numerous variables known to be important in lipid-mediated DNA transfection, including lipid formulation, the amount of lipid and DNA, lipid/DNA ratio, and cell concentration. Under optimal transfection conditions, approximately 5-25% of KS cells expressed the introduced DNA sequences. Adenoviral-mediated DNA delivery was more efficient than lipid delivery in 4 of 5 primary KS cell lines. Two of the lines (RW248 and RW376) were transduced by adenovirus at frequencies approaching 100%; two cell lines (CVU-1 and RW80) gave efficiencies of 20-35%. Two immortalized KS cell lines (KS Y-1 and KS SLK) were poorly infected, giving a transduction efficiency of <5%. These findings demonstrate that gene transfer into AIDS-KS cells is feasible, and suggest that vector strategies may be permissive for translating gene therapy approaches for the disease.
 ...
PMID:Lipid- and adenoviral-mediated gene transfer into AIDS-Kaposi's sarcoma cell lines. 962 96

We described previously a novel mode of gene transfer by infection of human B lymphocytes with recombinant Epstein-Barr virus (EBV) amplicons. This system was explored for its potential use in expressing various recombinant genes, including the cytokine IL-4, the HIV envelope glycoprotein (gp120) and a suicide and gag gene. Recombinant genes were present as multiple copy episomes and stable, high level recombinant gene expression could be detected by antigenic and functional assays. Amplicon-infected B cells secreted high levels of recombinant cytokine and efficiently presented recombinant antigens through classes I and II MHC-restricted antigen processing pathways. Thus, recombinant EBV amplicons can be used to express components of the immune system or heterologous genes for immune recognition in human B cells. Combining gene transfer with EBV infection may provide unique advantages for in vitro and in vivo gene transfer.
 ...
PMID:Immune modulation of human B lymphocytes by gene transfer with recombinant Epstein-Barr virus amplicons. 967 35

This paper provides a nursing perspective on ethical, legal, professional and practical issues faced by nurses working in HIV/AIDS care in relation to euthanasia/assisted suicide. Nurses who care for PLWHA (People Living with HIV/AIDS) have been conspicuously silent in the recent debates about euthanasia in Australia. Many factors prevent nurses from openly acknowledging their participation in assisted suicide/euthanasia and contributing to important debates about this topic. Their commitment to client confidentiality and the illegality of the practices are clearly significant factors which inhibit nurses from speaking freely. In addition, however, nurses' well-documented precarious legal position (Johnstone, 1994-alpha) and their subordinate status within the health care system make their public silence almost inevitable. Naming and challenging the factors which contribute to nurses silence, this paper draws on the experiences of nurses who have cared for PLWHA who have requested assistance in dying. It identifies practical, ethical and legal issues and dilemmas which can arise for nurses who may be involved in these practices, highlighting their special skills, relationships with clients, responsibilities and the complexity of their role; it also elucidates, however, the serious professional and personal risks nurses face given the legal and legislative status quo. This paper suggests that nurses may play a central, though covert, role in assisted suicide/euthanasia in HIV/AIDS care, rendering it imperative that their perspectives be included in the debates about the legalization of assisted suicide/euthanasia. Moreover, the paper identifies and challenges some severe impediments nurses must confront and address if they are to be able to contribute fully to this debate and to those which may arise in the future.
 ...
PMID:Breaking (through) the law--coming out of the silence: nursing, HIV/AIDS and euthanasia. 974 35

Results of routine testing at other sites can supplement surveillance of the HIV epidemic in Australia which is largely based upon voluntary testing. Since 1989, systematic onsite HIV testing has been undertaken on all bodies taken to the Victorian Institute of Forensic Medicine (VIFM). Information was collected on all cases of HIV infection detected at VIFM between 1989 and 1996, and matched to surveillance databases. In 8 years, 75 people were diagnosed with HIV; all except one were male. The age range was 14-70 years, mean 37.4 years. The major causes of death were suicide 35%, AIDS 21%, drug toxicity 16%, natural causes 12% and injury 7%. The major exposure categories were male homosexual 51%, male bisexual 11%, homosexual/bisexual IDU 16%, IDU other 8%, and haemophiliac 7%. For only two was exposure information unavailable. Seropositivity for anti-HCV and HBsAg was 37% and 11% respectively. The deceased was recorded as having HIV/AIDS on the police report in 73% of cases, and at least 90% of subjects had been diagnosed with HIV prior to their death. The study suggests there is relatively little undiagnosed HIV infection in Victoria, that HIV infection has not moved outside traditional risk groups, and that many tests for HIV are undertaken using false namecodes. Many patients could not be matched on the HIV/AIDS databases, identifying a problem with HIV surveillance systems in Victoria, and the need to capture all information on HIV positives detected at VIFM.
 ...
PMID:HIV positive tests at Coronial Services in Victoria 1989-1996: lessons for HIV surveillance. 974 4

This article critically reviews research on suicide, AIDS, and HIV seropositivity. Studies indicate that men with a diagnosis of AIDS or HIV seropositivity have up to 36 times greater risk of suicide than men without the diagnosis. Yet few studies controlled for independent risk factors such as premorbid or comorbid psychiatric syndromes. Also, control groups may not be appropriate, little data are available on women, and explanations of suicidal dynamics are mostly speculative. After a look at the research on the desire for euthanasia and assisted suicide with other illnesses, the author suggests alternative hypotheses concerning suicidality, the desire for euthanasia, and AIDS.
 ...
PMID:Suicide, euthanasia and AIDS. 978 50

Many positive trends in the health of Americans continued into 1997. In 1997, the preliminary birth rate declined slightly to 14.6 births per 1000 population, and the fertility rate, births per 1000 women 15 to 44 years of age, was unchanged from the previous year (65.3). These indicators suggest that the downward trend in births observed since the early 1990s may have abated. Fertility rates for white, black, and Native American women were essentially unchanged between 1996 and 1997. Fertility among Hispanic women declined 2% in 1997 to 103.1, the lowest level reported since national data for this group have been available. For the sixth consecutive year, birth rates dropped for teens. Birth rates for women 30 years or older continued to increase. The proportion of births to unmarried women (32.4%) was unchanged in 1997. The trend toward earlier utilization of prenatal care continued for 1997; 82.5% of women began prenatal care in the first trimester. There was no change in the percentage with late (third trimester) or no care in 1997. The cesarean delivery rate rose slightly to 20.8% in 1997, a reversal of the downward trend observed since 1989. The percentage of low birth weight (LBW) infants rose again in 1997 to 7.5%. The percentage of very low birth weight was up only slightly to 1.41%. Among births to white mothers, LBW increased for the fifth consecutive year, to 6.5%, whereas the rate for black mothers remained unchanged at 13%. Much, but not all, of the rise in LBW for white mothers during the 1990s can be attributed to an increase in multiple births. In 1996, the multiple birth rate rose again by 5%, and the higher-order multiple birth rate climbed by 20%. Infant mortality reached an all time low level of 7.1 deaths per 1000 births, based on preliminary 1997 data. Both neonatal and postneonatal mortality rates declined. In 1996, 64% of all infant deaths occurred to the 7.4% of infants born at LBW. Infant mortality rates continue to be more than two times greater for black than for white infants. Among all the states in 1996, Maine, Massachusetts, and New Hampshire had the lowest infant mortality rates. Despite declines in infant mortality, the United States continues to rank poorly in international comparisons of infant mortality. Expectation of life at birth reached a new high in 1997 of 76.5 years for all gender and race groups combined. Age-adjusted death rates declined in 1997 for diseases of the heart, accidents and adverse affects (unintentional injuries), homicide, suicide, malignant neoplasms, cerebrovascular disease, chronic liver disease and cirrhosis, and diabetes. In 1997, mortality due to HIV infection declined by 47%. Death rates for children from all major causes declined again in 1997. Motor vehicle traffic injuries and firearm injuries were the two major causes of traumatic death. A large proportion of childhood deaths continue to occur as a result of preventable injuries.
 ...
PMID:Annual summary of vital statistics-1997. 983 67


<< Previous 1 2 3 4 5 6 7 8 9 10 Next >>