Gypsyamber Dsouza

Dr. Gypsyamber Dsouza


Research Focus & Metrics

Academic Career Length

19Years (2008-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

View All Publications
1 July 2015 in Surgical Oncology Clinics of North America
Verified
Journal Article
Closed access
EREleni M. Rettig
Eleni M. Rettig
GDGypsyamber Dsouza
Gypsyamber Dsouza

6 October 2015 in Annals of Internal Medicine
Verified
Journal Article
Closed access
MSMichael J. Silverberg
Michael J. Silverberg
BLBryan Lau
Bryan Lau
CAChad J. Achenbach
Chad J. Achenbach
YJYuezhou Jing
Yuezhou Jing
KAKeri N. Althoff
Keri N. Althoff
FAfor the North American AIDS Cohort Collaboration on Research and Design of the International Epidemiologic Databases to Evaluate AIDS†
for the North American AIDS Cohort Collaboration on Research and Design of the International Epidemiologic Databases to Evaluate AIDS†
Cancer has become more common among persons with HIV. After examination of cumulative cancer incidence by age 75 years and calendar trends in cumulative incidence and hazard rates, it was determine... Background: Cancer is increasingly common among persons with HIV. Objective: To examine calendar trends in cumulative cancer incidence and hazard rate by HIV status. Design: Cohort study. Setting: ...

27 February 2017 in Cancer
Verified
Journal Article
Open access
PDF file
CFCarole Fakhry
Carole Fakhry
WWWilliam H. Westra
William H. Westra
SWSteven J. Wang
Steven J. Wang
AZAnnemieke van Zante
Annemieke van Zante
YZYuehan Zhang
Yuehan Zhang
GDGypsyamber Dsouza
Gypsyamber Dsouza
BACKGROUND: Human papillomavirus (HPV) is a well‐established prognostic marker for oropharyngeal squamous cell cancer (OPSCC). Because of the limited numbers of women and nonwhites in studies to date, sex and racial/ethnic differences in prognosis have not been well explored. In this study, survival differences were explored by the tumor HPV status among 1) patients with OPSCCs by sex and race and 2) patients with nonoropharyngeal (non‐OP) head and neck squamous cell cancers (HNSCCs).METHODS: This retrospective, multi‐institution study included OPSCCs and non‐OP HNSCCs of the oral cavity, larynx, and nasopharynx diagnosed from 1995 to 2012. Race/ethnicity was categorized as white non‐Hispanic, black non‐Hispanic, Asian non‐Hispanic, and Hispanic of any race. Tumors were centrally tested for p16 overexpression and the presence of HPV by HPV16 DNA and high‐risk HPV E6/E7 messenger RNA in situ hybridization. Kaplan‐Meier and Cox proportional hazards models were used to evaluate overall survival (OS).RESULTS: The study population included 239 patients with OPSCC and 621 patients with non‐OP HNSCC with a median follow‐up time of 3.5 years. After adjustments for the tumor HPV status, age, current tobacco use, and stage, the risk of death was lower for women versus men with OPSCC (adjusted hazard ratio, 0.55; P = .04). The results were similar with p16. In contrast, for non‐OP HNSCCs, HPV positivity, p16 positivity, and sex were not associated with OS.CONCLUSIONS: For OPSCC, there are differences in survival by sex, even after the tumor HPV status has been taken into account. For non‐OP HNSCC, the HPV status and the p16 status are not of prognostic significance. Cancer 2017;123:1566–1575. © 2017 American Cancer Society.

1 February 2021 in Cancer Discovery
Verified
Journal Article
Closed access
PDF file
ARAntoni Ribas
Antoni Ribas
RSRajarshi Sengupta
Rajarshi Sengupta
TLTrevan Locke
Trevan Locke
SZSayyed Kaleem Zaidi
Sayyed Kaleem Zaidi
KCKatie M. Campbell
Katie M. Campbell
GDGypsyamber Dsouza
Gypsyamber Dsouza
Summary: Published series on COVID-19 support the notion that patients with cancer are a particularly vulnerable population. There is a confluence of risk factors between cancer and COVID-19, and cancer care and treatments increase exposure to the virus and may dampen natural immune responses. The available evidence supports the conclusion that patients with cancer, in particular with hematologic malignancies, should be considered among the very high-risk groups for priority COVID-19 vaccination.

2 March 2021 in American Journal of Epidemiology
Verified
Journal Article
Open access
PDF file
GDGypsyamber Dsouza
Gypsyamber Dsouza
FBFiona Bhondoekhan
Fiona Bhondoekhan
LBLorie Benning
Lorie Benning
JMJoseph B Margolick
Joseph B Margolick
AAAdebola A Adedimeji
Adebola A Adedimeji
PTPhyllis C Tien
Phyllis C Tien
In 2019, the National Institutes of Health combined the Multicenter AIDS Cohort Study (MACS) and the Women’s Interagency HIV Study (WIHS) into the MACS/WIHS Combined Cohort Study (MWCCS). In this paper, participants who made a study visit during October 2018–September 2019 (targeted for MWCCS enrollment) are described by human immunodeficiency virus (HIV) serostatus and compared with people living with HIV (PLWH) in the United States. Participants include 2,115 women and 1,901 men with a median age of 56 years (interquartile range, 48–63); 62% are PLWH. Study sites encompass the South (18%), the Mid-Atlantic/Northeast (45%), the West Coast (22%), and the Midwest (15%). Participant race/ethnicity approximates that of PLWH throughout the United States. Longitudinal data and specimens collected for 35 years (men) and 25 years (women) were combined. Differences in data collection and coding were reviewed, and key risk factor and comorbidity data were harmonized. For example, recent use of alcohol (62%) and tobacco (28%) are common, as are dyslipidemia (64%), hypertension (56%), obesity (42%), mildly or severely impaired daily activities (31%), depressive symptoms (28%), and diabetes (22%). The MWCCS repository includes serum, plasma, peripheral blood mononuclear cells, cell pellets, urine, cervicovaginal lavage samples, oral samples, B-cell lines, stool, and semen specimens. Demographic differences between the MACS and WIHS can confound analyses by sex. The merged MWCCS is both an ongoing observational cohort study and a valuable resource for harmonized longitudinal data and specimens for HIV-related research.

4 December 2014 in American Journal of Epidemiology
Verified
Journal Article
Open access
PDF file
DBDaniel C. Beachler
Daniel C. Beachler
ESElizabeth A. Sugar
Elizabeth A. Sugar
JMJoseph B. Margolick
Joseph B. Margolick
KWKathleen M. Weber
Kathleen M. Weber
HSHoward D. Strickler
Howard D. Strickler
GDGypsyamber Dsouza
Gypsyamber Dsouza
Human papillomavirus (HPV) causes the majority of oropharyngeal cancers in the United States, yet the risk factors for and natural history of oral HPV infection are largely unknown. In 2010–2011, a US-based longitudinal cohort study of 761 human immunodeficiency virus (HIV)-infected and 469 at-risk HIV-uninfected participants from the Multicenter AIDS Cohort Study and the Women's Interagency HIV Study was initiated. Semiannually collected oral rinses were evaluated for 37 HPV genotypes using the Roche LINEAR ARRAY HPV Genotyping Test (Roche Molecular Systems, Pleasanton, California), and factors associated with oral HPV incidence and clearance were explored using adjusted Wei-Lin-Weissfeld modeling. Through 2013, the 2-year cumulative incidence of any type of oral HPV infection was 34% in HIV-infected persons and 19% in HIV-uninfected persons. However, many of these infections cleared. Seven percent of incident infections and 35% of prevalent infections persisted for at least 2 years. After adjustment for other risk factors, HIV infection (adjusted hazard ratio = 2.3, 95% confidence interval: 1.7, 3.2), reduced current CD4 cell count, and increased numbers of oral sex and “rimming” partners increased the risk of incident oral HPV infection, whereas male sex, older age, and current smoking increased the risk of oral HPV persistence (each P < 0.05). This helps explain the consistent associations observed between these factors and prevalent oral HPV infection in previous cross-sectional studies.