Raphael J Landovitz
Datos Biográficos
| ID | 6063884 |
|---|---|
| NOMBRE | Raphael J Landovitz |
| NOMBRES | Raphael J |
| APELLIDO | Landovitz |
| FIRMA | LANDOVITZ R J |
| AFILIACIONES | University of California, Los Angeles |
| ORCID | 0000-0002-1442-714X |
| VERIFICADO | Sí |
| TOTAL DE OBRAS | 20 |
| TOTAL DE CITAS | 30 |
| TOTAL COMO AUTOR | 20 |
| TOTAL COMO EDITOR | 0 |
| PRIMER AÑO DE PUBLICACIÓN | 2008 |
| AÑO MÁS RECIENTE DE PUBLICACIÓN | 2026 |
| ÍNDICE H | 1 |
PrEP as a “Hidden Message”
Within the context of this PrEP demonstration project, partner dynamics impacted PrEP adherence for HIV-negative cisgender women in serodiscordant relationships. We urge further investigation of relationship dynamics and PrEP adherence and persistence specifically among US-based cisgender women
The impact of intimate partner violence on PrEP adherence among U.S. Cisgender women at risk for HIV
NCT02584140 (ClinicalTrials.gov), registered 15/10/2015
Pharmacologic Drug Detection and Self-Reported Adherence in the HPTN069/ACTG5305 Phase II PrEP Trial
Adherence drives efficacy in PrEP clinical trials. We compared drug concentrations and self-reported adherence in HPTN069/ACTG5305, a double-blinded, randomized trial of the safety and tolerability of candidate PrEP regimens that included maraviroc (MVC), tenofovir (TDF), and emtricitabine (FTC). Plasma drug concentrations and self-reported adherence by computer-assisted self-interview (CASI) were assessed at study weeks 24 and 48. Descriptive st…
Influence of Participant Perceptions of Adherence-Related Interactions with Study/Study Team on Drug Levels
Adherence to HIV pre-exposure prophylaxis (PrEP) study drug is critical for safety, tolerability, and efficacy trials, and may be affected by how adherence is communicated by the study staff to trial participants. Increasingly, clinical trials investigating PrEP are creating and implementing 'participant-centered' approaches that discuss potential non-adherence neutrally (without negative judgement) and support efforts to adhere versus insisting …
Sexual behavior and medication adherence in men who have sex with men participating in a pre-exposure prophylaxis study of combinations of Maraviroc, Tenofovir Disoproxil Fumarate and/or Emtricitabine…
Long-Acting Injectable Therapy for People with HIV
Long-acting injectable antiretroviral medications are new to HIV treatment. People with HIV may benefit from a treatment option that better aligns with their preferences, but could also face new challenges and barriers. Authors from the fields of HIV, substance use treatment, and mental health collaborated on this commentary on the issues surrounding equitable implementation and uptake of LAI ART by drawing lessons from all three fields. We emplo…
Cabotegravir for HIV Prevention in Cisgender Men and Transgender Women
BACKGROUND: Safe and effective long-acting injectable agents for preexposure prophylaxis (PrEP) for human immunodeficiency virus (HIV) infection are needed to increase the options for preventing HIV infection. METHODS: We conducted a randomized, double-blind, double-dummy, noninferiority trial to compare long-acting injectable cabotegravir (CAB-LA, an integrase strand-transfer inhibitor [INSTI]) at a dose of 600 mg, given intramuscularly every 8 …
Covid-19 Vaccine Decision-making Factors in Racial and Ethnic Minority Communities in Los Angeles, California
Importance The COVID-19 pandemic has had disproportionate effects on racial and ethnic minority communities, where preexisting clinical and social conditions amplify health and social disparities. Many of these communities report lower vaccine confidence and lower receipt of the COVID-19 vaccine. Understanding factors that influence the multifaceted decision-making process for vaccine uptake is critical for narrowing COVID-19–related disparities.…
Acceptability of Long-Acting Injectable Cabotegravir (CAB LA) in HIV-Uninfected Individuals
Long-acting injectable PrEP could offer an alternative to daily oral PrEP, improve adherence and protection, if found acceptable, safe and effective. HPTN 077 evaluated injectable cabotegravir safety, tolerability and pharmacokinetics among HIV-uninfected males and females in sequentially-enrolled cohorts of two dosing strategies. We compared acceptability of product attributes, prevention preferences and future interest in injectable PrEP (FIIP)…
Complex decisions
Contraceptive adherence during acute and recent HIV-1 infection is important to maternal and child health given the elevated risk of vertical HIV-1 transmission and additional complications of pregnancy. Injectable contraception (IC) is the most common non-barrier modern contraception method used in sub-Saharan Africa (SSA). Adherence to IC after HIV-1 seroconversion is not well understood. We examined factors associated with IC discontinuation a…
Effective use of pre-exposure prophylaxis (PrEP) Among stimulant users with multiple condomless sex partners
PrEP's potential benefit for men who have sex with men (MSM) who use stimulants may be limited by adherence or prescriber willingness to recommend PrEP due to concerns of non-compliance. Using data from PATH-PrEP, a 48-week study evaluating PrEP for MSM in Los Angeles, we modeled an interaction between stimulant use and condomless sex with multiple partners (CAS-MP) on prevention-effective dried blood spot tenofovir-diphosphate concentrations. At…
Where Is the Opioid Use Epidemic in Mexico? A Cautionary Tale for Policymakers South of the US–Mexico Border
In North America, opioid use and its harms have increased in the United States and Canada over the past 2 decades. However, Mexico has yet to document patterns suggesting a higher level of opioid use or attendant harms. Historically, Mexico has been a country with low-level use of opioids, although heroin use has been documented. Low-level opioid use is likely attributable to structural, cultural, and individual factors. However, a range of dynam…
An HIV Preexposure Prophylaxis Demonstration Project and Safety Study for Young MSM
BACKGROUND: Young men who have sex with men (YMSM) are a key population for implementation of preexposure prophylaxis (PrEP) interventions. This open-label study examined adherence to PrEP and assessed sexual behavior among a diverse sample of YMSM in 12 US cities. METHODS: Eligible participants were 18- to 22-year-old HIV-uninfected MSM who reported HIV transmission risk behavior in the previous 6 months. Participants were provided daily tenofov…
HIV Transmission Risk Behavior in a Cohort of HIV-Infected Treatment-Naïve Men and Women in the United States
Individual-Level, Partnership-Level, and Sexual Event-Level Predictors of Condom Use During Receptive Anal Intercourse Among HIV-Negative Men Who Have Sex with Men in Los Angeles
Commercial lubricant use among HIV-negative men who have sex with men in Los Angeles
To inform the development and assess potential use of rectal microbicide gels for HIV prevention among men who have sex with men (MSM), we examined the dynamics and contexts of commercial lubricant use during receptive anal intercourse (RAI) within this population. From 2007 to 2010, 168 HIV-negative MSM living in Los Angeles who practice RAI completed computer-assisted self-interviews, which collected information on their last sexual event with …
Sexual Risk Behaviors and Acceptability of HIV Pre-Exposure Prophylaxis Among HIV-Negative Gay and Bisexual Men in Serodiscordant Relationships
The objective of this mixed methods study was to examine current sexual risk behaviors, acceptability and potential adoption of pre-exposure prophylaxis (PrEP) for HIV prevention, and sexual behavior intentions with PrEP adoption among HIV-negative gay and bisexual men (GBM) in HIV serodiscordant relationships. A multiracial/ethnic sample of 25 HIV-negative GBM in serodiscordant relationships completed a qualitative interview and a brief intervie…
Epidemiology, Sexual Risk Behavior, and HIV Prevention Practices of Men who Have Sex with Men Using GRINDR in Los Angeles, California
Motivators, concerns, and barriers to adoption of preexposure prophylaxis for HIV prevention among gay and bisexual men in HIV-serodiscordant male relationships
The purpose of this study was to identify factors that may facilitate or impede future adoption of preexposure prophylaxis (PrEP) for HIV prevention among gay and bisexual men in HIV-serodiscordant relationships. This qualitative study utilized semistructured interviews conducted with a multiracial/-ethnic sample of 25 gay and bisexual HIV-serodiscordant male couples (n=50 individuals) recruited from community settings in Los Angeles, CA. A modif…
Non-occupational post exposure prophylaxis as a biobehavioral HIV-prevention intervention
This project evaluated the feasibility and safety of a community-planned and financed program of non-occupational post exposure prophylaxis (nPEP) for 100 individuals. Individuals seeking nPEP within 72 hours of a potential HIV exposure were provided 28-day treatment using twice-daily lamivudine and zidovudine. Participants received a physical examination, HIV test and medications and were scheduled for follow-up counseling and data visits to 26-…
Epidemiology, Sexual Risk Behavior, and HIV Prevention Practices of Men who Have Sex with Men Using GRINDR in Los Angeles, California
Where Is the Opioid Use Epidemic in Mexico? A Cautionary Tale for Policymakers South of the US–Mexico Border
In North America, opioid use and its harms have increased in the United States and Canada over the past 2 decades. However, Mexico has yet to document patterns suggesting a higher level of opioid use or attendant harms. Historically, Mexico has been a country with low-level use of opioids, although heroin use has been documented. Low-level opioid use is likely attributable to structural, cultural, and individual factors. However, a range of dynam…
Non-occupational post exposure prophylaxis as a biobehavioral HIV-prevention intervention
This project evaluated the feasibility and safety of a community-planned and financed program of non-occupational post exposure prophylaxis (nPEP) for 100 individuals. Individuals seeking nPEP within 72 hours of a potential HIV exposure were provided 28-day treatment using twice-daily lamivudine and zidovudine. Participants received a physical examination, HIV test and medications and were scheduled for follow-up counseling and data visits to 26-…
Motivators, concerns, and barriers to adoption of preexposure prophylaxis for HIV prevention among gay and bisexual men in HIV-serodiscordant male relationships
The purpose of this study was to identify factors that may facilitate or impede future adoption of preexposure prophylaxis (PrEP) for HIV prevention among gay and bisexual men in HIV-serodiscordant relationships. This qualitative study utilized semistructured interviews conducted with a multiracial/-ethnic sample of 25 gay and bisexual HIV-serodiscordant male couples (n=50 individuals) recruited from community settings in Los Angeles, CA. A modif…
Sexual Risk Behaviors and Acceptability of HIV Pre-Exposure Prophylaxis Among HIV-Negative Gay and Bisexual Men in Serodiscordant Relationships
The objective of this mixed methods study was to examine current sexual risk behaviors, acceptability and potential adoption of pre-exposure prophylaxis (PrEP) for HIV prevention, and sexual behavior intentions with PrEP adoption among HIV-negative gay and bisexual men (GBM) in HIV serodiscordant relationships. A multiracial/ethnic sample of 25 HIV-negative GBM in serodiscordant relationships completed a qualitative interview and a brief intervie…
Epidemiology, Sexual Risk Behavior, and HIV Prevention Practices of Men who Have Sex with Men Using GRINDR in Los Angeles, California
Commercial lubricant use among HIV-negative men who have sex with men in Los Angeles
To inform the development and assess potential use of rectal microbicide gels for HIV prevention among men who have sex with men (MSM), we examined the dynamics and contexts of commercial lubricant use during receptive anal intercourse (RAI) within this population. From 2007 to 2010, 168 HIV-negative MSM living in Los Angeles who practice RAI completed computer-assisted self-interviews, which collected information on their last sexual event with …
Individual-Level, Partnership-Level, and Sexual Event-Level Predictors of Condom Use During Receptive Anal Intercourse Among HIV-Negative Men Who Have Sex with Men in Los Angeles
HIV Transmission Risk Behavior in a Cohort of HIV-Infected Treatment-Naïve Men and Women in the United States
An HIV Preexposure Prophylaxis Demonstration Project and Safety Study for Young MSM
BACKGROUND: Young men who have sex with men (YMSM) are a key population for implementation of preexposure prophylaxis (PrEP) interventions. This open-label study examined adherence to PrEP and assessed sexual behavior among a diverse sample of YMSM in 12 US cities. METHODS: Eligible participants were 18- to 22-year-old HIV-uninfected MSM who reported HIV transmission risk behavior in the previous 6 months. Participants were provided daily tenofov…
Complex decisions
Contraceptive adherence during acute and recent HIV-1 infection is important to maternal and child health given the elevated risk of vertical HIV-1 transmission and additional complications of pregnancy. Injectable contraception (IC) is the most common non-barrier modern contraception method used in sub-Saharan Africa (SSA). Adherence to IC after HIV-1 seroconversion is not well understood. We examined factors associated with IC discontinuation a…
Effective use of pre-exposure prophylaxis (PrEP) Among stimulant users with multiple condomless sex partners
PrEP's potential benefit for men who have sex with men (MSM) who use stimulants may be limited by adherence or prescriber willingness to recommend PrEP due to concerns of non-compliance. Using data from PATH-PrEP, a 48-week study evaluating PrEP for MSM in Los Angeles, we modeled an interaction between stimulant use and condomless sex with multiple partners (CAS-MP) on prevention-effective dried blood spot tenofovir-diphosphate concentrations. At…
Where Is the Opioid Use Epidemic in Mexico? A Cautionary Tale for Policymakers South of the US–Mexico Border
In North America, opioid use and its harms have increased in the United States and Canada over the past 2 decades. However, Mexico has yet to document patterns suggesting a higher level of opioid use or attendant harms. Historically, Mexico has been a country with low-level use of opioids, although heroin use has been documented. Low-level opioid use is likely attributable to structural, cultural, and individual factors. However, a range of dynam…
Acceptability of Long-Acting Injectable Cabotegravir (CAB LA) in HIV-Uninfected Individuals
Long-acting injectable PrEP could offer an alternative to daily oral PrEP, improve adherence and protection, if found acceptable, safe and effective. HPTN 077 evaluated injectable cabotegravir safety, tolerability and pharmacokinetics among HIV-uninfected males and females in sequentially-enrolled cohorts of two dosing strategies. We compared acceptability of product attributes, prevention preferences and future interest in injectable PrEP (FIIP)…
Cabotegravir for HIV Prevention in Cisgender Men and Transgender Women
BACKGROUND: Safe and effective long-acting injectable agents for preexposure prophylaxis (PrEP) for human immunodeficiency virus (HIV) infection are needed to increase the options for preventing HIV infection. METHODS: We conducted a randomized, double-blind, double-dummy, noninferiority trial to compare long-acting injectable cabotegravir (CAB-LA, an integrase strand-transfer inhibitor [INSTI]) at a dose of 600 mg, given intramuscularly every 8 …
Covid-19 Vaccine Decision-making Factors in Racial and Ethnic Minority Communities in Los Angeles, California
Importance The COVID-19 pandemic has had disproportionate effects on racial and ethnic minority communities, where preexisting clinical and social conditions amplify health and social disparities. Many of these communities report lower vaccine confidence and lower receipt of the COVID-19 vaccine. Understanding factors that influence the multifaceted decision-making process for vaccine uptake is critical for narrowing COVID-19–related disparities.…
Sexual behavior and medication adherence in men who have sex with men participating in a pre-exposure prophylaxis study of combinations of Maraviroc, Tenofovir Disoproxil Fumarate and/or Emtricitabine…
Long-Acting Injectable Therapy for People with HIV
Long-acting injectable antiretroviral medications are new to HIV treatment. People with HIV may benefit from a treatment option that better aligns with their preferences, but could also face new challenges and barriers. Authors from the fields of HIV, substance use treatment, and mental health collaborated on this commentary on the issues surrounding equitable implementation and uptake of LAI ART by drawing lessons from all three fields. We emplo…
Influence of Participant Perceptions of Adherence-Related Interactions with Study/Study Team on Drug Levels
Adherence to HIV pre-exposure prophylaxis (PrEP) study drug is critical for safety, tolerability, and efficacy trials, and may be affected by how adherence is communicated by the study staff to trial participants. Increasingly, clinical trials investigating PrEP are creating and implementing 'participant-centered' approaches that discuss potential non-adherence neutrally (without negative judgement) and support efforts to adhere versus insisting …
The impact of intimate partner violence on PrEP adherence among U.S. Cisgender women at risk for HIV
NCT02584140 (ClinicalTrials.gov), registered 15/10/2015
Pharmacologic Drug Detection and Self-Reported Adherence in the HPTN069/ACTG5305 Phase II PrEP Trial
Adherence drives efficacy in PrEP clinical trials. We compared drug concentrations and self-reported adherence in HPTN069/ACTG5305, a double-blinded, randomized trial of the safety and tolerability of candidate PrEP regimens that included maraviroc (MVC), tenofovir (TDF), and emtricitabine (FTC). Plasma drug concentrations and self-reported adherence by computer-assisted self-interview (CASI) were assessed at study weeks 24 and 48. Descriptive st…
PrEP as a “Hidden Message”
Within the context of this PrEP demonstration project, partner dynamics impacted PrEP adherence for HIV-negative cisgender women in serodiscordant relationships. We urge further investigation of relationship dynamics and PrEP adherence and persistence specifically among US-based cisgender women
Medicine (19 obras) · HIV/AIDS Research and Interventions (18 obras) · HIV, Drug Use, Sexual Risk (13 obras) · Family medicine (12 obras) · Men who have sex with men (12 obras) · Internal Medicine (10 obras) · Pre-exposure prophylaxis (9 obras) · Demography (8 obras) · Human immunodeficiency virus (HIV (8 obras) · Public health (8 obras)