Paul Bohjanen

Dr. Paul Bohjanen


Research Focus & Metrics

Academic Career Length

37Years (1990-Present)

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

Representative Publications

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26 June 2014 in New England Journal of Medicine
Verified
Journal Article
Closed access
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DBDavid Boulware
David Boulware
DMDavid B. Meya
David B. Meya
CMConrad Muzoora
Conrad Muzoora
MRMelissa A. Rolfes
Melissa A. Rolfes
KHKatherine Huppler Hullsiek
Katherine Huppler Hullsiek
GMGraeme Meintjes
Graeme Meintjes
Cryptococcal meningitis accounts for 20 to 25% of acquired immunodeficiency syndrome–related deaths in Africa. Antiretroviral therapy (ART) is essential for survival; however, the question of when ART should be initiated after diagnosis of cryptococcal meningitis remains unanswered. We assessed survival at 26 weeks among 177 human immunodeficiency virus–infected adults in Uganda and South Africa who had cryptococcal meningitis and had not previously received ART. We randomly assigned study participants to undergo either earlier ART initiation (1 to 2 weeks after diagnosis) or deferred ART initiation (5 weeks after diagnosis). Participants received amphotericin B (0.7 to 1.0 mg per kilogram of body weight per day) and fluconazole (800 mg per day) for 14 days, followed by consolidation therapy with fluconazole. The 26-week mortality with earlier ART initiation was significantly higher than with deferred ART initiation (45% [40 of 88 patients] vs. 30% [27 of 89 patients]; hazard ratio for death, 1.73; 95% confidence interval [CI], 1.06 to 2.82; P=0.03). The excess deaths associated with earlier ART initiation occurred 2 to 5 weeks after diagnosis (P=0.007 for the comparison between groups); mortality was similar in the two groups thereafter. Among patients with few white cells in their cerebrospinal fluid (<5 per cubic millimeter) at randomization, mortality was particularly elevated with earlier ART as compared with deferred ART (hazard ratio, 3.87; 95% CI, 1.41 to 10.58; P=0.008). The incidence of recognized cryptococcal immune reconstitution inflammatory syndrome did not differ significantly between the earlier-ART group and the deferred-ART group (20% and 13%, respectively; P=0.32). All other clinical, immunologic, virologic, and microbiologic outcomes, as well as adverse events, were similar between the groups. Deferring ART for 5 weeks after the diagnosis of cryptococcal meningitis was associated with significantly improved survival, as compared with initiating ART at 1 to 2 weeks, especially among patients with a paucity of white cells in cerebrospinal fluid. (Funded by the National Institute of Allergy and Infectious Diseases and others; COAT ClinicalTrials.gov number, NCT01075152.)

17 April 2007 in Proceedings of the National Academy of Sciences
Verified
Journal Article
Closed access
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RGRobert R. Graham
Robert R. Graham
CKChieko Kyogoku
Chieko Kyogoku
SSSnaevar Sigurdsson
Snaevar Sigurdsson
Irina Vlasova-St. LouisIrina Vlasova-St. Louis
Irina Vlasova-St. Louis
LDLeela R. L. Davies
Leela R. L. Davies
DADavid Altshuler
David Altshuler
Systematic genome-wide studies to map genomic regions associated with human diseases are becoming more practical. Increasingly, efforts will be focused on the identification of the specific functional variants responsible for the disease. The challenges of identifying causal variants include the need for complete ascertainment of genetic variants and the need to consider the possibility of multiple causal alleles. We recently reported that risk of systemic lupus erythematosus (SLE) is strongly associated with a common SNP in IFN regulatory factor 5 ( IRF5 ), and that this variant altered spicing in a way that might provide a functional explanation for the reproducible association to SLE risk. Here, by resequencing and genotyping in patients with SLE, we find evidence for three functional alleles of IRF5 : the previously described exon 1B splice site variant, a 30-bp in-frame insertion/deletion variant of exon 6 that alters a proline-, glutamic acid-, serine- and threonine-rich domain region, and a variant in a conserved polyA+ signal sequence that alters the length of the 3′ UTR and stability of IRF5 mRNAs. Haplotypes of these three variants define at least three distinct levels of risk to SLE. Understanding how combinations of variants influence IRF5 function may offer etiological and therapeutic insights in SLE; more generally, IRF5 and SLE illustrates how multiple common variants of the same gene can together influence risk of common disease.

1 June 2011 in The Journal of Infectious Diseases
Verified
Journal Article
Open access
PDF file
DBDavid Boulware
David Boulware
KHKatherine Huppler Hullsiek
Katherine Huppler Hullsiek
CPCamille E. Puronen
Camille E. Puronen
ARAdam Rupert
Adam Rupert
JBJason V. Baker
Jason V. Baker
ISIrini Sereti
Irini Sereti
Background. Substantial morbidity occurs during the first year of antiretroviral therapy (ART) in persons with advanced human immunodeficiency virus (HIV) disease despite HIV suppression. Biomarkers may identify high-risk groups. Methods. Pre-ART and 1-month samples from an initial ART trial were evaluated for biomarkers associated with AIDS events or death within 1–12 months. Case patients (n = 63) and control patients (n = 126) were 1:2 matched on baseline CD4 cell count, hepatitis status, and randomization date. All had ≥1 log10 HIV RNA level decrease at 1 month. Results. Case patients had more frequent prior AIDS events, compared with control patients (P = .004), but similar HIV RNA levels at baseline. Pre-ART and 1-month C-reactive protein (CRP), D-dimer, and interleukin 6 (IL-6) levels and pre-ART hyaluronic acid (HA) levels were associated with new AIDS events or death (P ≤ .01). Patients who experienced immune reconstitution inflammatory syndrome (IRIS) events had higher pre-ART tumor necrosis factor α (TNF-α) and HIV RNA levels and significant 1-month increases in CRP, D-dimer, IL-6, interleukin 8, CXCL10, TNF-α, and interferon-γ levels, compared with patients who experienced non-IRIS events (P ≤ .03). Individuals with baseline CRP and HA levels above the cohort median (>2.1 mg/L and >50.0 ng/mL, respectively) had increased risk of AIDS or death (OR, 4.6 [95% CI, 2.0–10.3]; P < .001) and IRIS (OR, 8.7 [95% CI, 2.2–34.8] P = .002). Conclusions. Biomarkers of Inflammation (CRP, IL-6), coagulation (D-dimer), and tissue fibrosis (HA) measured pre-ART and at 1 month are associated with higher risk of AIDS events, IRIS, or death, warranting additional study as risk stratification strategies.

15 August 2010 in Clinical Infectious Diseases
Verified
Journal Article
Open access
PDF file
DMDavid Meya
David Meya
YMYukari C. Manabe
Yukari C. Manabe
BCBarbara Castelnuovo
Barbara Castelnuovo
BCBethany A. Cook
Bethany A. Cook
AEAli M. Elbireer
Ali M. Elbireer
DBDavid Boulware
David Boulware
Background. Cryptococcal meningitis (CM) remains a common AIDS-defining illness in Africa and Asia. Subclinical cryptococcal antigenemia is frequently

1 November 2010 in The Lancet Infectious Diseases
Verified
Journal Article
Closed access
LHLewis J Haddow
Lewis J Haddow
RCRobert Colebunders
Robert Colebunders
GMGraeme Meintjes
Graeme Meintjes
SLStephen D Lawn
Stephen D Lawn
JEJulian H Elliott
Julian H Elliott
DBDavid Boulware
David Boulware

1 June 2008 in Clinical Infectious Diseases
Verified
Journal Article
Open access
PDF file
AKAndrew Kambugu
Andrew Kambugu
DMDavid Meya
David Meya
JRJoshua Rhein
Joshua Rhein
MOMeagan O’brien
Meagan O’brien
EJEdward N. Janoff
Edward N. Janoff
DBDavid Boulware
David Boulware
Background. Cryptococcal meningitis (CM) is the proximate cause of death in 20%–30% of persons with acquired immunodeficiency syndrome in Africa.Meth