Search PubMed⌕ Search

SEARCH · Search PubMed

Results for “Multiple Partners”

Search indexed PubMed citations on genomics, clinical trials, systematic reviews and public health. Explore titles, authors and supplied subject terms, then open the PubMed record.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 1,585 records · Page 88Linked to original sources

At how many histocompatibility loci do congenic mouse strains differ? Probability estimates and some implications.

An expression is derived for the probability that a congenic strain and its inbred partner will differ by multiple linked histocompatibility genes when the number of incompatibilities between the original donor and background strains is known and the number of backcrosses to produce the strain is specified. This probability is shown to be rather large for typical values of the pertinent variables. Potential complications in data interpretation arising from unsuspected multiple incompatibilities between a congenic pair are discussed in relation to antigenic strength, H-locus polymorphism tissue distribution of H antigens, and certain types of experiments in which the cell-mediated lympholysis assay is used.

Animals↗

Cullin3 is a KLHL10-interacting protein preferentially expressed during late spermiogenesis.

Kelch-like 10 (KLHL10) is a member of the BTB (Bric-a-brac, Tramtrack, and Broad-Complex)-kelch protein superfamily essential for spermiogenesis and male fertility. In a search for KLHL10-interacting proteins using a yeast two-hybrid assay, we identified Cullin3 (CUL3) as one of multiple KLHL10-interacting partners. Yeast cotransformation assays revealed that CUL3 bound the BTB/POZ domain of KLHL10. Northern blot and quantitative RT-PCR analyses demonstrated that Cul3 mRNA was preferentially expressed in the testis. In situ hybridization analysis localized Cul3 mRNA to spermatids in the adult testis. CUL3 protein was detected in elongating and elongated spermatids (steps 10-16) by immunofluorescent microscopy. The expression pattern of CUL3 resembles KLHL10. CUL3 was coimmunoprecipated with KLHL10, and KLHL10 was also detected in the CUL3 immunoprecipitants using testis lysates. These findings suggest that KLHL10, like other BTB/kelch proteins, interacts with CUL3 to form a CUL3-based ubiquitin E3 ligase that functions specifically in the testis to mediate protein ubiquitination during spermiogenesis.

Animals↗

Hox regulation of normal and leukemic hematopoietic stem cells.

PURPOSE OF REVIEW: Herein we focus on recent studies of knock out mice that demonstrate a function for the clustered homeobox (Hox) genes in normal hematopoiesis, on papers that point to their general involvement in human leukemia, and discuss the advances in the understanding of the mechanisms underlying their role in these processes. RECENT FINDINGS: Expression analysis and gain- or loss- of function studies have shown that Hox play an important role in the regulation of early stages of hematopoiesis, including the self-renewal of hematopoietic stem cells (HSCs)/early progenitors. In the area of leukemia, numerous models of murine leukemia have demonstrated a role for Hox in the pathobiology of the disease. Moreover, the identification of multiple Hox genes as partners of chromosomal translocations and the observed global deregulation of Hox genes and cofactors demonstrated by gene profiling of cells from leukemic patients, have unequivocally shown a major function for Hox genes and cofactors in a wide spectrum of human leukemia. SUMMARY: The identification of Hox genes as HSC regulators has been exploited to develop strategies to efficiently expand HSCs ex vivo, a key step to the success of therapies based on HSC transplantation and the understanding of mechanisms underlying HSC regulation. As leukemia is the result of deregulation of normal HSC development, the elucidation of the role of Hox in the pathobiology of the disease is helping to understand how HSCs self-renew and differentiate, and moreover, should facilitate the development of strategies for the management of leukemia.

Animals↗

Migrants' risky sexual behaviours in India and at home in far western Nepal.

OBJECTIVE: To examine Nepali migrants' vulnerability to HIV/sexually transmitted infections (STIs) and their possible role in causing the epidemic in far western Nepal. METHODS: From August to October 2000, we conducted six focus group discussions among 53 returned migrants from India, mainly from Mumbai. Data were analysed by interpretative thematic analysis. RESULTS: Migrants commonly had multiple sexual encounters, changed partners, and used condoms infrequently both in India and at home. Several factors influenced them to practice high-risk sexual behaviours. In India, these included peer norms and pressures, cheaper sex, lack of family restraint, drinking alcohol, and low perceived vulnerability to HIV/STIs. In Nepal, these factors included the migrants' new status, frequent local festivals, and low perceived vulnerability to HIV/STIs. Participants displayed substantial deficits in their knowledge of HIV/STIs. CONCLUSIONS: This study revealed Nepali migrants' high-risk sexual behaviours both abroad and at home. Understanding these realities will assist in the development of culturally appropriate HIV/STI interventions necessary to halt the spread of HIV/STIs in Nepal.

Adolescent↗

Sperm, nuclear, phospholipid, and red blood cell antibodies and isotype RF in infertile couples and patients with autoimmune rheumatic diseases.

PROBLEM: To determine if measuring of nonorgan-specific autoantibodies is useful for better understanding and management of unexplained infertility. METHODS: Sera were obtained from 70 infertile couples, 57 rheumatic patients, and 76 fertile donors. Sperm antibodies (SA) were detected by the tests of Kibrick and Friberg, anti-histones, anti-cardiolipin antibodies, and RF isotypes by ELISA, antinuclear antibodies by indirect immunofluorescence, and anti-red blood cell antibodies by Capture-R. RESULTS: Multiple autoimmune reactivity (both partners positive and/or more than one type of autoantibody involved), higher than naturally occurring in fertile individuals, was found in 55% of the idiopathically infertile couples. IgA-RF was the dominant autoimmune marker. SA revealed similar rates in patients with rheumatic diseases and in infertiles with or without other autoantibodies. CONCLUSION: Although no single autoimmunity marker could predict occurrence of SA, the coincidence of enhanced polyclonal autoimmunity in both partners of infertile couples might potentiate their negative effect on reproduction.

Adolescent↗

A comprehensive school-based clinic: university and community partnership.

PURPOSE: To describe the evolution and current status of a university and community partnership engaged in operating an urban elementary school-based clinic (SBC) POPULATION: The children at the school who are eligible to receive care at the SBC include 500 elementary students and 200 adolescents who attend a magnet junior high school housed in the same building. The vast majority of the children attending the school are from families whose incomes are below the national poverty level. Eighty-five percent of the children are black. Fifteen percent are Hispanic, non-white. CONCLUSIONS: A variety of services and programs are offered to the children and their families for the promotion of health and the prevention of mental disorders. Service, education, and research occur simultaneously to achieve the multiple goals of the partners and participants. PRACTICE IMPLICATIONS: Advanced practice nurses can provide quality health and mental health care services for school-age children and their families through SBCs. Institutional partnerships, capitalizing on each other's strengths, can expand the availability of SBC offerings.

Adolescent↗

Persistence of extraordinarily low levels of genetically homogeneous human immunodeficiency virus type 1 in exposed seronegative individuals.

Some individuals remain inexplicably seronegative and lack evidence for human immunodeficiency virus type 1 (HIV-1) infection by conventional serologic or virologic testing despite repeated high-risk virus exposures. Here, we examined 10 exposed seronegative (ES) individuals exhibiting HIV-1-specific cytotoxicity for the presence of HIV-1. We discovered HIV-1 DNA in resting CD4(+) T cells (mean, 0.05 +/- 0.01 copies per million cells) at multiple visits spanning 69 to 130 weeks in two ES individuals at levels that were on average 10(4)- to 10(6)-fold lower than those of other HIV-1-infected populations reported. Sequences of HIV-1 envelope and gag genes remained markedly homogeneous, indicating little to undetectable virus replication. These results provide the evidence for HIV-1 infection in ES individuals below the detection limit of standard assays, suggesting that extraordinary control of infection can occur. The two HIV-infected ES individuals remained healthy and were not superinfected with other HIV-1 strains despite continued high-risk sexual exposures to multiple HIV-infected partners. Understanding the mechanisms that confer diminished replicative capacity of HIV-1 in these hosts is paramount to developing strategies for protection against and control of HIV-1 infection.

Amino Acid Sequence↗

Sexual behaviour, AIDS and poverty in Sub-Saharan Africa.

Within the rapidly progressing pandemic of the acquired immunodeficiency syndrome (AIDS) Sub-Saharan Africa plays a disproportionally large role. The reported data indicate that heterosexual transmission is the predominant cause for the rapid spread in this, one of the world's poorest regions. Prostitution, though poorly understood in the African context, unstable family structure, lack of male circumcision, aversion to, and high cost of, condom use, and risky sexual behaviour, including multiple sexual contacts and partners, are causal and facilitating factors in the rapid spread of HIV infection. Virtually all of these factors are related to poverty. Education and information, which in the absence of an effective curative drug and/or vaccine, would be essential, is also a costly undertaking. Deeper understanding of and increased attention to the economic, as well as social and cultural, parameters of the Sub-Saharan AIDS endemic is needed for the implementation of preventive measures.

Acquired Immunodeficiency Syndrome↗

HIV risk behavior and risk-related characteristics of young Russian men who exchange sex for money or valuables from other men.

One of the world's newest HIV epidemics is emerging now in Russia and other countries of Central and Eastern Europe. We report on the HIV risk characteristics of young Russian men who exchange sex for money or valuables, a group that constitutes almost one-fourth of men surveyed recently in gay-identified venues in St. Petersburg. Among 96 MSM who have sex for economic gain, most reported multiple male and female partners, 45% had unprotected anal intercourse with their male partners in the past three months, and many not only received but also gave money or valuables themselves to their male partners. Relative to men who did not give sex for economic gain (n = 326), those who did were younger (n = .0001), less well-educated (p = .0001), and more often unemployed (p = .02). They also were less knowledgeable concerning even basic HIV risk reduction steps (p = .02) and held many misconceptions about safer sex. Men who exchanged sex for economic gain had more male (p = .001) and female partners (p = .01) in the past three months than men who did not, and one-third had been treated for STDs. In the context of Russia's rapid cultural and social changes, economic turmoil, and gay communities not yet experienced in AIDS, HIV prevention programs must be tailored to risk patterns and dynamics different than those found in the gay communities of many western countries.

Adolescent↗

The alcoholics in treatment HIV risk (ATRISK) study: gender, ethnic and geographic group comparisons.

OBJECTIVE: This study attempted to identify alcoholic inpatients as a population at elevated risk for HIV infection in comparison with other groups. Modes of risk across gender, ethnic and geographic subgroups were explored in order to guide targeted preventive efforts in the future. METHOD: Structured interviews were conducted with 802 alcoholic inpatients (481 males, 321 females) in New York City and western New York State. RESULTS: Measures of sexual risk behavior indicated low rates of condom use and high rates of multiple or nonprimary sex partners. Trading sex for drugs or money was common. Injection drug use was reported by nearly one-fifth of these patients. Most subjects (59.9%) reported at least one sexually transmitted disease. Self-reported HIV status yielded a seroprevalence rate of 6.7% among those who knew their HIV status. CONCLUSIONS: Findings indicated rates of HIV infection and associated risk behaviors similar to, and in some instances exceeding, those of other high-risk subpopulations. Subgroup differences indicated unique patterns of risk behavior across gender, ethnic and geographic subgroups. Findings are discussed with regard to prevention and treatment implications of high-risk behaviors among alcoholic inpatients.

Adult↗

Alcohol use and risky sexual behavior among college students and youth: evaluating the evidence.

OBJECTIVE: To evaluate the empirical associations between alcohol use and risky sex at two levels of analysis. Global associations test whether individuals who engage in one behavior are more likely to engage in the other, whereas event-specific associations test whether the likelihood of engaging in one behavior on a given occasion varies as a function of engaging in the other on that same occasion. METHOD: Studies examining the association between drinking and risky sex in samples of college students and youth were reviewed. Those published in the past 10 years and using event-level methodology or random sampling were emphasized. RESULTS: Findings were generally consistent across levels of analysis, but differed across types of risky behaviors. Drinking was strongly related to the decision to have sex and to indiscriminate forms of risky sex (e.g., having multiple or casual sex partners), but was inconsistently related to protective behaviors (e.g., condom use). Moreover, the links among alcohol use, the decision to have sex and indiscriminate behaviors were found in both between-persons and within-persons analyses, suggesting that these relationships cannot be adequately explained by stable individual differences between people who do and do not drink. Analysis of event characteristics showed that drinking was more strongly associated with decreased protective behaviors among younger individuals, on first intercourse experiences and for events that occurred on average longer ago. CONCLUSIONS: Future efforts aimed at reducing alcohol use in potentially sexual situations may decrease some forms of risky sex, but are less likely to affect protective behaviors directly.

Adolescent↗

Examination of the communication practices between state newborn screening programs and the medical home.

BACKGROUND: As outlined in the Newborn Screening Task Force report published in August 2000, the newborn screening system is more than just testing, but also involves follow-up, diagnosis, treatment, and evaluation. As such, multiple professional and public partners need to be adequately involved in the system to help ensure success. In addition, newborn screening programs are state-based; therefore, policies and procedures vary from state to state. Historically, there has been little uniformity between state newborn screening programs. OBJECTIVE: To examine the communication practices of state newborn screening programs in the United States, particularly in relation to the medical home. METHODS: A facsimile survey of program staff in all US newborn screening programs. Survey data were collected in August 2000. RESULTS: All 51 programs participated. States were questioned about whether or not they had a procedure to identify the infant's medical home before the child's birth. Twelve states (24%) indicated that there was a procedure in place, whereas 39 states (76%) indicated that either no procedure existed or that they were unsure. In contrast, all state programs (except 1) indicated they notified the primary care physician about abnormal results and the need for follow-up. In addition, state programs reported that primary care physicians have responsibilities within the newborn screening system, particularly related to communicating with parents about screen-positive results and coordinating the collection of a second specimen. Thirty states reported that they directly notified parents of screen-positive infants of results and the need for follow-up as well. In regard to informing parents about newborn screening, 45% of states indicated that primary care physicians had some responsibility in informing parents about newborn screening. Most often, parents were informed about newborn screening just before specimen collection, and the most commonly used techniques to educate parents were informational brochures and conversation. Thirty-five states reported that they engaged in long-term tracking of infants after diagnosis confirmation. Only about half of these states provided long-term tracking of all of the conditions included in their state's newborn screening test panel. Of these 35 states that engaged in long-term tracking, 25 reported that they requested patient information from the primary care physician and/or subspecialist about ongoing treatment and follow-up. CONCLUSIONS: Newborn screening roles and responsibilities vary tremendously between states. Improvements in communication and better-defined protocols are needed, particularly between state newborn screening programs and the medical home. Many states identified the medical home as having significant responsibilities related to the short-term follow-up of screen-positive infants. Identification of the correct medical home before testing would help to reduce unnecessary time and frustration for state newborn screening programs, especially in the follow-up of infants that are difficult to locate. In addition, primary care physicians (ie, the medical home) need to have appropriate and ongoing involvement, including a mechanism to provide feedback to their state newborn screening program. This is particularly important given the adoption of tandem mass spectrometry by an increasing number of states, and the likely expansion of newborn screening in the future. Recommendations include the following: Primary care physicians should have appropriate and ongoing involvement in the newborn screening system and should be appropriately represented on state newborn screening advisory committees. States should develop protocols to identify the medical home before heelstick screening. States should work with families, primary care physicians, and prenatal health care professionals to develop well-defined systems for pretesting education of parents. All newborn screening results (both positive and negative) should be sent to the infant's medical home. If results are not received by the medical home, efforts should be made to obtain results. Medical homes and subspecialists should submit follow-up information on screen-positive infants and infants with confirmed diagnoses to the state newborn screening program, regardless of the existence of state requirements to do so, and efforts to build enhanced direct communication systems, linking state newborn screening programs to community-based medical homes, should continue.

Communication↗

Oral condyloma acuminatum.

Oral condyloma acuminatum is a papillomatous lesion that is transmitted sexually and associated with the human papilloma virus. Condyloma acuminatum generally appears one to three months after exposure to an infected partner and presents in multiple form in the oral cavity.

Adult↗

[Correlation between genome mutations and the cell division types in immunological sensitization states].

The authors examined the frequency of cells with polyploidy-P, with amitot division-AD and with mitotic division-MD in 25 patients with schizophrenia and proven anticerebral autoimmune sensibilization by means of blast-transformation test-BS, in 20 partners of marriages with multiple spontaneous abortions and suspected isoimmunization-PCA as well as control group of 63 healthy adults and newborn infants. Simultaneous increase of the frequency of cells with polyploidy and amitotic division was established in patients with schizophrenia--1,16% of P and 0.40% AD in 4 women with spontaneous abortiosn -- 1.5% of P and 0.80% of AD compared with the control values of 0.54% of P and 0.17% of AD. The highest percentage P -- 1.12 and AD -- 2.1 was found in BS with chronic process, in whom the blast-transformation reaction to brain antigen --34% was mostly manifested. In the cultures of BS, treated with brain antigen, AD reached up to 1.38%. The increase of AD was accompanied with lowering of mitotic index: BS -- 1.2% of MD and 0.40 of AD; PSA -- 2,04% of MD and 0.50 of AD compared with the control values of 4% of MD and 0.17% of AD. The results showed that immunologic sensibilization was accompanied by an increase of genome mutations and amitotic division and with lowering of mitotic index; they revealed polyploidy and amitotic division as compensatory mechanisms of the organisms under certain conditions.

Abortion, Habitual↗

Studies in the epidemiology of prostatic cancer: expanded sampling.

From comparisons of prostatic cancer patients with matched control patients for selected risk variables, patients are characterized by three main trends: (a) delayed sexual drive and development, (b) early repression of sexuality, and (c) premature cessation of sexuality. Excessive numbers of patients reported occupational exposure to fertilizers and auto exhaust fumes. Diets of the patients were higher in animal fats. No differences were found between both groups for frequencies of multiple marriages or sex partners, nor for stressful effects from selected events early or late in life. Trends for circumcision and other variables are presented. The data suggest that early differences are hormonally conditioned, support a provisional endogenous rationale for initiation of prostatic cancer, and oppose a hypothesis favoring transmissible oncogenic agents. If results continue to hold up with increased sampling, limitation upon sexual activity at any time of life may increase risk.

Adolescent↗

It's like a regular part of gay life: repeat HIV antibody testing among gay and bisexual men.

HIV antibody testing is a critical facet of national AIDS prevention strategies and increasing numbers of persons are tested each year. Research has shown that a significant number of men who have sex with men are repeatedly tested for HIV antibodies, and many are tested regularly every 6 months. This study investigated the prevalence of repeat testing (having been tested three or more time) and regular testing (having been tested three or more times and getting tested every 6 months), and their association to testing attitudes and sexual behaviors. We found that 66% of 253 HIV seronegative gay and bisexual men surveyed at a large gay pride festival had been repeatedly tested, and 47% were tested regularly. Repeat testing was associated with knowing people with HIV or AIDS, whereas regular testing was associated with younger age and not being in an exclusive sexual relationship. Both repeat and regular testers held more positive health-related attitudes about testing than nonrepeat and nonregularly tested men, respectively. Contrary to previous research, repeat testing was not associated with unprotected anal intercourse or unprotected oral sex. However, both repeat and regular testing were positively related to condom use during anal intercourse as well as having multiple protected anal intercourse partners. We therefore conclude that both repeat testing and higher rates of condom use reflect positive health attitudes and that repeat testing may function to meet the needs of some men who have sex with men.

AIDS Serodiagnosis↗

Heterosexually acquired HTLV-III/LAV disease (AIDS-related complex and AIDS). Epidemiologic evidence for female-to-male transmission.

Thirty-seven percent (15/41) of patients with human T-cell lymphotropic virus type III (HTLV-III) disease (acquired immunodeficiency syndrome [AIDS] or AIDS-related complex) sequentially evaluated at Walter Reed Army Medical Center, Washington, DC, acquired this infection from a partner(s) of the opposite sex. Demographic features of these 15 patients (ten males and five females) differed substantially from those for patients reported to the Centers for Disease Control. Heterosexual contact with partners who developed AIDS or who were at risk for AIDS was confirmed in six patients. The remaining nine patients had multiple (greater than 50) heterosexual partners and/or sexual contact with prostitutes. The method of sexual activity did not appear to be related to disease acquisition; however, this study clearly demonstrated that receptive anal intercourse was not a requirement. The observations reported herein provide further epidemiologic evidence to support the occurrence of bidirectional heterosexual transmission (both male to female and female to male) of HTLV-III infection and disease.

Acquired Immunodeficiency Syndrome↗

Superoxide and iron: partners in crime.

Superoxide (O2-) poses multiple threats, which are diminished by a family of metalloenzymes, the superoxide dismutases. Among the damaging effects of O2- are direct oxidation of low-molecular-weight reductants; inactivation of a select group of enzymes; and reaction with NO to yield the strong oxidant, peroxynitrite. Of even greater import is the ability of O2- to univalently oxidize the [4 Fe-4 S] clusters of dehydratases, which causes release of iron. The "free" iron, which is kept reduced by cellular reductants, then reduces hydroperoxides to hydroxyl or alkoxyl radicals. Because the "free" iron will preferentially bind to anionic polymers, such as nucleic acids, or to anionic surfaces, such as cell membranes, these radicals will be generated adjacent to these vital targets and will preferentially attack them. O2- and iron can thus be viewed as partners in crime, and reciprocal regulatory effects between iron and O2- may be anticipated. These are discussed.

Escherichia coli↗