drug tolerability
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Cancers ◽  
2022 ◽  
Vol 14 (2) ◽  
pp. 407
Author(s):  
Darren M. C. Poon ◽  
Kuen Chan ◽  
Tim Chan ◽  
Foo-Yiu Cheung ◽  
Daisy Lam ◽  
...  

Progression to metastatic disease occurs in about half of all men who develop prostate cancer (PC), one of the most common cancers in men worldwide. Androgen deprivation therapy has been the mainstay therapy for patients with metastatic PC (mPC) since the 1940s. In the last decade, there has been unprecedented advancement in systemic therapies, e.g., taxane, androgen-signalling pathway inhibitors, and biomarker-driven targeted therapies for various stages of disease, resulting in overall survival improvement. Adding to ongoing controversies over how best to treat these patients is the recognition that ethnicity may influence prognosis and outcomes. This review discusses recent evidence for the impacts of Asian ethnicity specifically, which includes environmental, sociocultural, and genetic factors, on the approach to pharmacological management of mPC. Clear inter-ethnic differences in drug tolerability, serious adverse events (AEs), and genetic heterogeneity must all be considered when dosing and scheduling for treatment, as well as designing future precision studies in PC.


GYNECOLOGY ◽  
2021 ◽  
Vol 23 (4) ◽  
pp. 354-363
Author(s):  
Ksenia V. Krasnopolskaya ◽  
Vera E. Balan ◽  
Irina Y. Ershova ◽  
Elena O. Skorik ◽  
Sergey E. Malygin ◽  
...  

Aim. To assess the efficacy and safety of using the homeopathic drug Mastopol for the relief of mastalgia in women with infertility, including those associated with endometriosis, as well as to study the drug tolerability and adherence to the treatment, as well as to determine its antiproliferative and analgesic effects in patients of the study cohort. Study design: open-label, randomized, non-comparative, observational study. Material and methods. 79 infertile women with mastalgia (67 with cyclic mastalgia and 12 with acyclic mastalgia) were examined and treated with Mastopol. Mastopol was prescribed 1 tablet 3 times a day sublingually. The course of treatment was 8 weeks. The efficacy of mastalgia relief was assessed using a Visual Analogue Scale (VAS). Treatment outcomes were considered good if pain severity by the VAS decreased by 4 or more points from the baseline levels at the end of Mastopol treatment course. Results. One Mastopol treatment course provided good treatment outcomes in 76,2% of patients with cyclic mastalgia and in 33,3% of patients with acyclic mastalgia. There were no adverse reactions or complications in patients treated with Mastopol. Conclusions. Mastopol has established itself as a quite effective and safe drug in patients of the study cohort; if there is an insufficient effect, Mastopol can supplement traditional pharmacological agents recorded in the current clinical guidelines.


BMJ Open ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. e044696
Author(s):  
Nadine Ezard ◽  
Brendan Clifford ◽  
Adrian Dunlop ◽  
Raimondo Bruno ◽  
Andrew Carr ◽  
...  

ObjectivesTo examine the safety of an agonist-type treatment, lisdexamfetamine (LDX), at 250 mg/day among adults with methamphetamine (MA) dependence.DesignA dose-escalating, phase-2, open-label, single-group study of oral LDX at two Australian drug treatment services.SettingThe study was conducted at two Australian stimulant use disorder treatment clinics.ParticipantsThere were 16 participants: at least 18 years old, MA dependent for at least the preceding 2 years using ICD-10 criteria, reporting use of MA on at least 14 of the preceding 28 days.InterventionsDaily, supervised LDX of 100–250 mg, single-blinded to dose, ascending-descending regimen over 8 weeks (100–250 mg over 4 weeks; followed by 4-week dose reduction regimen, 250–100 mg). Participants were followed through to week 12.OutcomesPrimary outcomes were safety, drug tolerability and regimen completion at the end of week 4. Participants were followed to week 12. Secondary outcomes included: change in MA use; craving; withdrawal; severity of dependence; risk behaviour; change in other substance use; medication acceptability; potential for non-prescription use; adherence and neurocognitive functioning.ResultsFourteen of 16 participants (87.5%) completed escalation to 250 mg/day. Two participants withdrew from the trial in the first week: one relocated away from the study site, the other self-withdrew due to a possible, known side effect of LDX (agitation). There was one serious adverse event of suicidal ideation which resolved. All other adverse events were mild or moderate in severity and known side effects of LDX. No participant was withdrawn due to adverse events. MA use decreased from a median of 21 days (IQR: 16–23) to 13 days (IQR: 11–17) over the 4-week escalation period (p=0.013).ConclusionsLDX at a dose of up to 250 mg/day was safe and well tolerated by study participants, warranting larger trials as a pharmacotherapy for MA dependence.Trial registration numberACTRN12615000391572.


2021 ◽  
Vol 20 (1) ◽  
pp. 128-135
Author(s):  
A. K. Ignatova ◽  
I. I. Kalinina ◽  
D. A. Evseev ◽  
K. S. Antonova ◽  
G. A. Novichkova ◽  
...  

Mercaptopurine (МР) is a key element of the maintenance therapy of acute leukemias. Different amounts of active and toxic metabolites can be synthesized in patients who are receiving the same doses of the drug due to pharmacokinetic differences. This contributes to the unequal drug tolerability and the need of dose adjustment. For a long time, the only tool for adjusting 6-MP dose was the level of leukocytes and granulocytes in the peripheral blood. With the understanding of genetic factors affecting the metabolism of 6-MP and development of next-generation sequencing technology, clinical guidelines for thiopurine dosing based on a pharmacogenetic approach have been emerged. In this article, we report two patients belonging to a small ethnic group in Russia with abnormal 6-MP toleration and substantiate the advantages of a personalized, pharmacogeneticallybased approach to 6-MP administration. The patient's parents agreed to use the information, including the child's photo, in scientific research and publications. 


2021 ◽  
Vol 8 (1) ◽  
pp. e000782
Author(s):  
William Alexander Wright ◽  
Louise E Crowley ◽  
Dhruv Parekh ◽  
Anjali Crawshaw ◽  
Davinder P Dosanjh ◽  
...  

BackgroundPirfenidone and nintedanib are the only disease-modifying treatments available for idiopathic pulmonary fibrosis (IPF). Our aim was to test their effectiveness and safety in clinical practice.MethodsThis is a single-centre retrospective observational study undertaken at a specialised interstitial lung disease centre in England. Data including progression-free survival (PFS), mortality and drug tolerability were compared between patients with IPF on antifibrotic therapies and an untreated control group who had a forced vital capacity percentage (FVC %) predicted within the licensed antifibrotic treatment range.Results104 patients received antifibrotic therapies and 64 control patients were identified. PFS at 6 months was significantly greater in the antifibrotic group (75.0%) compared with the control group (56.3%) (p=0.012). PFS was not significant at 12 or 18 months when comparing the antifibrotic group with the control group. The 12-month post-treatment mean decline in FVC % predicted (−4.6±6.2%) was significantly less than the 12-month pretreatment decline (−10.4±11.8%) (p=0.039). The 12-month mortality rate was not significantly different between the antifibrotic group (25.3%) and the control group (35.5%) (p=0.132). Baseline Body Mass Index of≤25, baseline diffusion capacity for carbon monoxide percentage predicted of ≤35 and antifibrotic discontinuation within 3 months were independent predictors of 12-month mortality. Antifibrotic discontinuation was significantly higher by 3 and 6 months for patients on pirfenidone than those on nintedanib (p=0.006 and p=0.044, respectively). Discontinuation at 12 months was not significantly different (p=0.381).ConclusionsThis real-world study revealed that antifibrotics are having promising effects on PFS, lung function and mortality. These findings may favour commencement of nintedanib as first-line antifibrotic therapy, given the lower rates of early treatment discontinuation, although further studies are required to investigate this.


2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Anmoldeep Randhawa ◽  
Nandita Pasari ◽  
Tulika Sinha ◽  
Mayank Gupta ◽  
Anju M. Nair ◽  
...  

Abstract Background Penicillium funiculosum NCIM1228 is a non-model filamentous fungus that produces high-quality secretome for lignocellulosic biomass saccharification. Despite having desirable traits to be an industrial workhorse, P. funiculosum has been underestimated due to a lack of reliable genetic engineering tools. Tolerance towards common fungal antibiotics had been one of the major hindrances towards development of reliable transformation tools against the non-model fungi. In this study, we sought to understand the mechanism of drug tolerance of P. funiculosum and the provision to counter it. We then attempted to identify a robust method of transformation for genome engineering of this fungus. Results Penicillium funiculosum showed a high degree of drug tolerance towards hygromycin, zeocin and nourseothricin, thereby hindering their use as selectable markers to obtain recombinant transformants. Transcriptome analysis suggested a high level expression of efflux pumps belonging to ABC and MFS family, especially when complex carbon was used in growth media. Antibiotic selection medium was optimized using a combination of efflux pump inhibitors and suitable carbon source to prevent drug tolerability. Protoplast-mediated and Agrobacterium-mediated transformation were attempted for identifying efficiencies of linear and circular DNA in performing genetic manipulation. After finding Ti-plasmid-based Agrobacterium-mediated transformation more suitable for P. funiculosum, we improvised the system to achieve random and homologous recombination-based gene integration and deletion, respectively. We found single-copy random integration of the T-DNA cassette and could achieve 60% efficiency in homologous recombination-based gene deletions. A faster, plasmid-free, and protoplast-based CRISPR/Cas9 gene-editing system was also developed for P. funiculosum. To show its utility in P. funiculosum, we deleted the gene coding for the most abundant cellulase Cellobiohydrolase I (CBH1) using a pair of sgRNA directed towards both ends of cbh1 open reading frame. Functional analysis of ∆cbh1 strain revealed its essentiality for the cellulolytic trait of P. funiculosum secretome. Conclusions In this study, we addressed drug tolerability of P. funiculosum and developed an optimized toolkit for its genome modification. Hence, we set the foundation for gene function analysis and further genetic improvements of P. funiculosum using both traditional and advanced methods.


Pharmaceutics ◽  
2021 ◽  
Vol 13 (1) ◽  
pp. 107
Author(s):  
Debra Wu ◽  
Douglas Vogus ◽  
Vinu Krishnan ◽  
Marta Broto ◽  
Anusha Pusuluri ◽  
...  

Liposome-based drug delivery systems have allowed for better drug tolerability and longer circulation times but are often optimized for a single agent due to the inherent difficulty of co-encapsulating two drugs with differing chemical profiles. Here, we design and test a prodrug based on a ribosylated nucleoside form of 5-fluorouracil, 5-fluorouridine (5FUR), with the final purpose of co-encapsulation with doxorubicin (DOX) in liposomes. To improve the loading of 5FUR, we developed two 5FUR prodrugs that involved the conjugation of either one or three moieties of tryptophan (W) known respectively as, 5FUR−W and 5FUR−W3. 5FUR−W demonstrated greater chemical stability than 5FUR−W3 and allowed for improved loading with fewer possible byproducts from tryptophan hydrolysis. Varied drug ratios of 5FUR−W: DOX were encapsulated for in vivo testing in the highly aggressive 4T1 murine breast cancer model. A liposomal molar ratio of 2.5 5FUR−W: DOX achieved a 62.6% reduction in tumor size compared to the untreated control group and a 33% reduction compared to clinical doxorubicin liposomes in a proof-of-concept study to demonstrate the viability of the co-encapsulated liposomes. We believe that the new prodrug 5FUR−W demonstrates a prodrug design with clinical translatability by reducing the number of byproducts produced by the hydrolysis of tryptophan, while also allowing for loading flexibility.


Author(s):  
Bela Shah ◽  
Neha Jangid ◽  
Aswini A. Naidu

<p class="abstract"><strong>Background:</strong> Isotretinion was approved by United States Food and Drug Administration (US FDA) in 1982 for the treatment of severe recalcitrant nodulocystic acne. Its conventional recommended dose has been 0.5-1.0 mg/kg body weight per day for 16-32 weeks, with a maximum cumulative dose of 120 mg/kg. Objective of the study was to assess the efficacy and tolerability of 24 week of once daily micronized isotretinoin therapy in the treatment of moderate to severe acne vulgaris was conducted.</p><p class="abstract"><strong>Methods:</strong> Total n=580 of patients were included with 249 (43%) male and 331 (57%) females. Patients were assessed at baseline 6, 12 and 24 weeks and 12 weeks post treatment follow-up based on the assessment of severity of acne vulgaris using global acne grading system (GAGS), assessment of improvement in lesion counts, global assessment of overall efficacy by doctor (based on overall assessment) and by patients (based on overall relief in symptoms) and overall assessment of drug tolerability.<strong></strong></p><p class="abstract"><strong>Results:</strong> In terms of improvement in lesions, excellent results from 4% (22) in week 6th has move to 34% (193) in week 24th. In terms of global efficacy examined by doctors, very effective results i.e. 40% (234) in 12th week has moved to 70% (403) in 24th week. In terms of drug tolerability, excellent results have moved from 119 patients to 190 patients by end of the study.</p><p class="abstract"><strong>Conclusions:</strong> Hence the micronized isotretinoin therapy had overall satisfactory outcome in the treatment of patients with moderate to severe acne vulgaris (grade 2, 3 and 4).</p>


2020 ◽  
Author(s):  
William Alexander Wright ◽  
Louise Crowley ◽  
Dhruv Parekh ◽  
Anjali Crawshaw ◽  
Davinder Dosanjh ◽  
...  

Abstract Background Pirfenidone and nintedanib are the only disease-modifying treatments available for idiopathic pulmonary fibrosis (IPF). Our aim was to test their effectiveness and safety in clinical practice.Methods This is a single centre retrospective observational study undertaken at a specialised interstitial lung disease centre in England. Data including progression-free survival (PFS), mortality and drug tolerability were compared between IPF patients on antifibrotic therapies and an untreated control group who had a forced vital capacity percentage (FVC %) predicted within the licensed antifibrotic treatment range.Results 104 patients received antifibrotic therapies and 64 control patients were identified. PFS at 6 months was significantly greater in the antifibrotic group (75.0%) compared to the control group (56.3%) (p=0.012). PFS was not significant at 12 or 18 months. The 12-month post-treatment mean decline in FVC% predicted (-4.6±6.2%) was significantly less than the 12-month pre-treatment decline (-10.4 ±11.8%) (p=0.039). The 12-month mortality rate was not significantly different between the antifibrotic group (25.3%) and the control group (35.5%) (p=0.132). Baseline BMI≤25, baseline DLco% predicted ≤35 and antifibrotic discontinuation within 3 months were independent predictors of 12-month mortality. Antifibrotic discontinuation was significantly higher by 3 and 6 months for patients on pirfenidone than those on nintedanib (p=0.006 and p=0.044, respectively). Discontinuation at 12 months was not significantly different (p=0.381).Conclusion This real-world study revealed that antifibrotics are having promising effects on PFS, lung function and mortality. These findings may favour commencement of nintedanib as first line antifibrotic therapy, given the lower rates of early treatment discontinuation.


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