scholarly journals Modelling the contribution of the hypnozoite reservoir to Plasmodium vivax transmission

eLife ◽  
2014 ◽  
Vol 3 ◽  
Author(s):  
Michael T White ◽  
Stephan Karl ◽  
Katherine E Battle ◽  
Simon I Hay ◽  
Ivo Mueller ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Plasmodium Vivax ◽  
Blood Stage ◽  
Transmission Model ◽  
Line Treatment ◽  
First Line ◽  
Liver Stage ◽  
Initial Infection ◽  
Treatment Regimens ◽  
First Line Treatment

Plasmodium vivax relapse infections occur following activation of latent liver-stages parasites (hypnozoites) causing new blood-stage infections weeks to months after the initial infection. We develop a within-host mathematical model of liver-stage hypnozoites, and validate it against data from tropical strains of P. vivax. The within-host model is embedded in a P. vivax transmission model to demonstrate the build-up of the hypnozoite reservoir following new infections and its depletion through hypnozoite activation and death. The hypnozoite reservoir is predicted to be over-dispersed with many individuals having few or no hypnozoites, and some having intensely infected livers. Individuals with more hypnozoites are predicted to experience more relapses and contribute more to onwards P. vivax transmission. Incorporating hypnozoite killing drugs such as primaquine into first-line treatment regimens is predicted to cause substantial reductions in P. vivax transmission as individuals with the most hypnozoites are more likely to relapse and be targeted for treatment.

A nationwide population-based study comparing survival in unresectable advanced or synchronous metastatic esophageal and gastric adenocarcinoma.

2020 ◽  
Vol 38 (4_suppl) ◽  
pp. 308-308
Author(s):  
Marieke Pape ◽  
Pauline A.J. Vissers ◽  
David Bertwistle ◽  
Laura McDonald ◽  
Hanneke W.M. Van Laarhoven ◽  
...  
Keyword(s):  
Systemic Treatment ◽  
Rank Test ◽  
Tumor Characteristics ◽  
Line Treatment ◽  
First Line ◽  
Treatment Regimens ◽  
Netherlands Cancer Registry ◽  
Number Of Patients ◽  
Significant Difference ◽  
First Line Treatment

308 Background: Similarities between esophageal and gastric adenocarcinomas have been identified in terms of genomic characteristics. There is however no consensus on the combined or stratified inclusion of esophageal adenocarcinoma (EAC) within gastric cancer (GC) clinical trials. The aim of our study was to compare patient and tumor characteristics, first-line treatment regimens and overall survival (OS) of patients with EAC and GC. Methods: We selected patients with unresectable advanced and/or synchronous metastatic EAC (n = 1554) or GC (including junction tumors; n = 2095) diagnosed in the period 2015-2017 from the nationwide Netherlands Cancer Registry. Patients with a positive HER2 test result and/or receiving trastuzumab as a first-line treatment were excluded. Data on OS were analyzed using Kaplan-Meier curves with Log-Rank test. Results: The EAC patient population had significantly more male patients (83% vs 66%), lower median age (68 vs 71 years) and higher median BMI (25.4 vs 24.5). Significant differences in location of metastases were identified, with higher percentages in non-regional lymph nodes (48% vs 28%), liver (50% vs 35%), lung (21% vs 9%) and bone (19% vs 7%) and lower in peritoneum (5% vs 42%), in EAC versus GC patients respectively. EAC patients more often received any type (supportive or active systemic) of treatment (76% vs 60%). Median OS was longer in EAC than GC patients (EAC: 4.8 vs GC: 4.1 months; p < 0.01). The percentages of patients receiving first-line systemic treatment were equal in both groups (43%). The number of patients receiving CapOx or FOLFOX was not significantly different (43% vs 47%). Carboplatin+paclitaxel was more frequently given in EAC versus GC (34% vs 3%), while EOX or ECC was given less frequently (12% vs 30%). No significant difference was observed in median OS between EAC and GC patients receiving first-line active systemic treatment (8.0 vs 7.6 months; p = 0.28). Conclusions: Patient characteristics, tumor characteristics, treatment regimens and OS differ between EAC and GC patients. Despite these differences, in patients receiving first-line active systemic treatment no significant differences in OS were found.

scholarly journals In VitroAntimicrobial Susceptibility Patterns of Blastocystis

2015 ◽  
Vol 59 (8) ◽  
pp. 4417-4423 ◽  
Author(s):  
Tamalee Roberts ◽  
Stephen Bush ◽  
John Ellis ◽  
John Harkness ◽  
Damien Stark
Keyword(s):  
Current Treatment ◽  
Line Treatment ◽  
First Line ◽  
Content Type ◽  
Treatment Regimens ◽  
Drug Treatments ◽  
Resistant Strains ◽  
Susceptibility Patterns ◽  
First Line Treatment

ABSTRACTBlastocystisis the most common human enteric protist with controversial clinical significance. Metronidazole is considered a first-line treatment forBlastocystisinfection; however, there has been increasing evidence for the lack of efficacy of this treatment. Treatment failure has been reported in several clinical cases, and recentin vitrostudies have suggested the occurrence of metronidazole-resistant strains. In this study, we tested 12Blastocystisisolates from 4 commonBlastocystissubtypes (ST1, ST3, ST4, and ST8) against 12 commonly used antimicrobials (metronidazole, paromomycin, ornidazole, albendazole, ivermectin, trimethoprim-sulfamethoxazole [TMP-SMX], furazolidone, nitazoxanide, secnidazole, fluconazole, nystatin, and itraconazole) at 10 different concentrationsin vitro. It was found that each subtype showed little sensitivity to the commonly used metronidazole, paromomycin, and triple therapy (furazolidone, nitazoxanide, and secnidazole). This study highlights the efficacy of other potential drug treatments, including trimethoprim-sulfamethoxazole and ivermectin, and suggests that current treatment regimens be revised.

Checkpoint inhibitors in combination with chemotherapy for first-line treatment of advanced non-small cell lung cancer: A systematic review and meta-analysis of randomized controlled trials (RCTs).

2019 ◽  
Vol 37 (8_suppl) ◽  
pp. 117-117
Author(s):  
Aung Tun ◽  
Wai Lin Thein ◽  
Aymen Elfiky ◽  
James Gasperino ◽  
Elizabeth Guevara
Keyword(s):  
Standard Treatment ◽  
Advanced Nsclc ◽  
Checkpoint Inhibitors ◽  
Small Cell ◽  
High Grade ◽  
Line Treatment ◽  
Small Cell Lung ◽  
First Line ◽  
Treatment Regimens ◽  
First Line Treatment

117 Background: Non-small cell lung cancer (NSCLC) accounts for ~85% of lung cancers among which the metastatic disease represents ~ 57%, and long-term prognosis remains poor. Combined chemo-immunotherapy can have synergistic anticancer activities through the immunomodulatory impact of checkpoint inhibitors and the immunogenic effect of chemotherapy. Methods: We systematically conducted a comprehensive literature search using PUBMED, EMBASE and SCOPUS databases through October 1, 2018. RCTs of first-line chemotherapy +/- immunotherapy in patients with advanced NSCLC were incorporated in the analysis. A generic inverse variance method was used to calculate the estimated pooled Hazard ratio (HR) for overall survival (OS) and progression-free survival (PFS). The mantel-haenszel method was used to calculate the estimated pooled risk ratio (RR) with 95% confidence interval (CI) for pooled overall response rate (ORR), all-grade adverse events (AEs), and high-grade AEs (≥ grade 3). Heterogeneity was assessed with Cochrane Q-statistic. Random effects were used due to significant heterogeneity among studies. Results: Seven phase 2 & 3 RCTs (Keynote-021,189, 407, IMpower-131, 150, checkmate-227, and Govindan et al) including 3785 patients with advanced NSCLC were included in the analysis. IMpower 150 trial allowed EGFR or ALK mutated patients. The study arm used standard treatment regimens in combination with ipilimumab, pembrolizumab, atezolizumab, or nivolumab, while control arm used only standard treatment regimens. The pooled HR for PFS was 0.65 (95% CI: 0.56-0.77; P=0.00001), the pooled HR for OS was 0.73 (95% CI: 0.59-0.90; P=0.003), and the pooled RR for ORR was 1.45 (95 CI: 1.17-1.8; P=0.0007). The pooled RRs for all-grade AEs and high-grade AEs were 1.1 (95% CI: 1-1.21; P=0.05) and 1.28 (95% CI: 1.13-1.46; P=0.0001), respectively. Conclusions: Adding immunotherapy to standard regimen significantly improves PFS, OS, and ORR for the first-line treatment of advanced NSCLC. The combined regimen results in a slightly higher risk of high-grade AEs without a significant increase in the risk of all-grade AEs.

scholarly journals The status and progress of first-line treatment against Helicobacter pylori infection: a review

2021 ◽  
Vol 14 ◽  
pp. 175628482198917
Author(s):  
Caiqi Liu ◽  
Yuan Wang ◽  
Jiaqi Shi ◽  
Chunhui Zhang ◽  
Jianhua Nie ◽  
...  
Keyword(s):  
Eradication Rate ◽  
Susceptibility Testing ◽  
Empirical Therapy ◽  
Drug Susceptibility ◽  
Drug Susceptibility Testing ◽  
Line Treatment ◽  
First Line ◽  
Quadruple Therapy ◽  
Treatment Regimens ◽  
First Line Treatment

Helicobacter pylori (HP) is a major causative agent of chronic gastritis and peptic ulcer. HP is also engaged in the development of gastric cancer and gastric mucosa-associated lymphoid tissue lymphoma. It is an important pathogenic factor in various other systemic diseases, such as vitamin B12 deficiency, iron deficiency, and idiopathic thrombocytopenia. The current consensus is that unless there is a special reason, eradication therapy should be implemented whenever HP infection is found, and it is ideally successful the first time. International guidelines recommend that under certain conditions, treatment should be personalized based on drug susceptibility testing. However, drug susceptibility testing is often not available because it is expensive, time-consuming, and difficult to obtain living tissue. Each region has separately formulated guidelines or consensuses on empirical therapy. Owing to an increasing drug resistance rate in various places, the eradication rate of proton pump inhibitor (PPI) triple therapy and sequential therapy has been affected. These regimens are rarely used; the PPI triple especially has been abandoned in most areas. Currently, radical treatment regimens for HP involve bismuth-containing quadruple therapy and concomitant therapy. However, quadruple therapy has its own limitations, such as complex drug administration. To improve the effectiveness, safety, and compliance, many clinical studies have proposed useful modified regimens, which mainly include the modified bismuth-containing quadruple regimen, high-dose dual therapy, and vonoprazan-containing regimens. Studies have shown that these emerging regimens have acceptable eradication rates and safety, and are expected to become first-line treatments in empirical therapy. However, the problem of decline in the eradication rate caused by drug resistance has not been fundamentally solved. This review not only summarizes the effectiveness of mainstream regimens in the first-line treatment of HP infection with the currently increasing antibiotic resistance rates, but also summarizes the effectiveness and safety of various emerging treatment regimens.

The Evolution Between 2001 and 2010 In the Uk Costs of Resolving a Mild to Moderate Bleeding Episode with Pd-aPCC Versus rFVIIa In Haemophilia A Patients with inhibitors.

Blood ◽  
2010 ◽  
Vol 116 (21) ◽  
pp. 1518-1518
Author(s):  
Paresh Sewpaul ◽  
Donna Ashley ◽  
Paul Riley
Keyword(s):  
Bleeding Episode ◽  
Haemophilia A ◽  
Line Treatment ◽  
First Line ◽  
Treatment Regimens ◽  
Bypassing Agents ◽  
Third Line ◽  
The Uk ◽  
Third Line Treatment ◽  
First Line Treatment

Abstract Abstract 1518 Introduction: Haemophilia A is a rare inherited bleeding disorder characterised by spontaneous or trauma-related bleeding, most commonly into the joints, leading to pain, swelling and limited movement. Some 30–50% of patients with haemophilia A develop inhibitors to their standard treatment, comprised of FVIII concentrates. There are two bypassing agents used for the management of bleeding episodes in patients with haemophilia A with inhibitors in the UK: recombinant factor VII (rFVIIa, NovoSeven®) and plasma-derived activated prothrombin complex concentrate (pd-aPCC, Feiba®). Objective: A systematic review of the cost-effectiveness of pd-aPCC versus rFVIIa was published in 2003. Since the analysis, costs of bypassing agents in the UK have changed significantly (pd-aPCC +30% from ≤0.57/U to ≤0.74/U; rFVIIa -11% from ≤0.51/mcg to ≤0.46/mcg). The present study examines the evolution in costs of resolving a mild to moderate bleeding episode with treatment initiated outside hospital. Methods: A decision analytic model estimated the expected costs and outcomes of resolving a mild-moderate bleeding episode in patients with haemophilia A with inhibitors. The model compared three treatment regimens in patients with a mean weight 70kg. Each regimen comprised first-, second- and third-line treatment: (1) pd-aPCC-pd-aPCC-rFVIIa; (2) pd-aPCC-rFVIIa-rFVIIa; and (3) rFVIIa-rFVIIa-rFVIIa. Efficacy and dosing of pd-aPCC and rFVIIa were estimated from the published literature, with rFVIIa assumed to resolve 92% of mild-moderate bleeds when used as first and second line treatment and pd-aPCC resolving 79% and 88% of mild-moderate bleeds when used first and second line respectively. Patients whose bleeding episodes were not resolved with first-line treatment were admitted to hospital for second- and third-line treatment. Costs included in the economic model were bypassing agent costs and hospitalisation costs. Results: The different treatment regimens result in different total costs for the resolution of a single mild-moderate bleeding episode with up to three lines of treatment: (1) GBP 13,542 (EUR 15,180); (2) GBP 12,985 (EUR 14,556); and (3) GBP 8,569 (EUR 9,605). Since 2001, the costs of regimens 1 and 2 have increased by 26% and 18%, but regimen 3 has decreased by 11% in the UK. Conclusion: Divergence in the price of pd-aPCC and rFVIIa since 2001 has increased the cost-effectiveness of rFVIIa. The results reinforce the fact that effective first-line treatment with rFVIIa results in lower overall treatment costs due to a reduced need for further treatment and associated hospitalisation costs. Adopting rFVIIa as first-line treatment is cost-saving and more effective compared to reserving rFVIIa as a second- or third-line treatment option. Disclosures: Sewpaul: Novo Nordisk : Employment. Ashley:Novo Nordisk : Employment. Riley:Novo Nordisk Ltd: Employment.

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