scholarly journals Efficacy and Safety of Novel Aspirin Formulations: A Randomized, Double-Blind, Placebo-Controlled Study

Pharmaceutics ◽  
2022 ◽  
Vol 14 (1) ◽  
pp. 187
Author(s):  
Rocco Mollace ◽  
Micaela Gliozzi ◽  
Roberta Macrì ◽  
Annamaria Tavernese ◽  
Vincenzo Musolino ◽  
...  

Low-dose aspirin represents the best option in the secondary prevention of coronary artery disease, but its extensive use in primary prevention is limited by the occurrence of gastric mucosal lesions and increased risk of bleeding. We investigated the safety profile of a novel sublingual aspirin formulation in 200 healthy volunteers, randomly assigned to ten (n = 20 each) different 7-day once-daily treatment regimens. Gastric mucosal injury based on the modified Lanza score (MLS), the histopathology of gastric mucosa and the serum determination of thromboxane B2 (TXB2) and urinary 11-dehydro-TXB2 levels were evaluated at basal as well as after 7 days of each placebo or aspirin treatment regimen. In Groups A and B (placebo—oral and sublingual, respectively), no changes in MLS and in gastric mucosal micro-vessel diameter were found at day 7. In contrast, in Groups C and D (oral standard aspirin—100 and 50 mg daily, respectively), the median MLS was significantly increased. Very few changes were found in Groups E and F (standard sublingual aspirin—100 and 50 mg, respectively). Groups G and H (oral administration of micronized collagen-cogrinded aspirin) showed gastric protection compared to Groups C and D. Moreover, Groups I and L (sublingual collagen-cogrinded aspirin—100 and 50 mg, respectively) showed a significant reduction (Group I) or total abolition (Group L) of gastric mucosal lesions and no difference compared to the standard one in serum TXB2 and urinary 11-dehydro-TXB2 levels. In conclusion, our data show that the new formulation leads to a better safety profile compared to standard aspirin, representing a better therapeutic option for extended use in primary and secondary prevention of cardiovascular diseases.

Antioxidants ◽  
2021 ◽  
Vol 10 (3) ◽  
pp. 439
Author(s):  
Naila Boby ◽  
Muhammad Aleem Abbas ◽  
Eon-Bee Lee ◽  
Zi-Eum Im ◽  
Walter H. Hsu ◽  
...  

Pyrus ussuriensis Maxim (Korean pear) has been used for hundreds of years as a traditional herbal medicine for asthma, cough, and atopic dermatitis in Korea and China. Although it was originally shown to possess anti-inflammatory, antioxidant, and antiatopic properties, its gastroprotective effects have not been investigated. In the present study, we evaluated the protective effects of Pyrus ussuriensis Maxim extract (PUE) against ethanol-induced gastritis in rats. The bioactive compound profile of PUE was determined by gas chromatography mass spectroscopy (GC-MS) and high-performance liquid chromatography (HPLC). The gastroprotection of PUE at different doses (250 and 500 mg/kg body weight) prior to ethanol ingestion was evaluated using an in vivo gastritis rat model. Several endpoints were evaluated, including gastric mucosal lesions, cellular degeneration, intracellular damage, and immunohistochemical localization of leucocyte common antigen. The gastric mucosal injury and ulcer score were determined by evaluating the inflamed gastric mucosa and by histological examination. To identify the mechanisms of gastroprotection by PUE, antisecretory action and plasma prostaglandin E2 (PGE2), gastric mucosal cyclic adenosine monophosphate (cAMP), and histamine levels were measured. PUE exhibited significant antioxidant effects with IC50 values of 56.18 and 22.49 µg/mL for 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 2,2′- azino-di-(3-ethylbenzothiazoline)-6-sulfonic acid (ABTS) inhibition (%), respectively. In addition, GC/MS and HPLC analyses revealed several bioactive compounds of PUE. Pretreatment with PUE significantly (P < 0.05) decreased the ulcer index by preventing gastric mucosal lesions, erosion, and cellular degeneration. An immunohistochemical analysis revealed that PUE markedly attenuated leucocyte infiltration in a dose-dependent manner. The enhancement of PGE2 levels and attenuation of cAMP levels along with the inhibition of histamine release following PUE pretreatment was associated with the cytoprotective and healing effects of PUE. In contrast, the downregulation of the H+/K+ ATPase pathway as well as muscarinic receptor (M3R) and histamine receptor (H2R) inhibition was also involved in the gastroprotective effects of PUE; however, the expression of cholecystokinin-2 receptors (CCK2R) was unchanged. Finally, no signs of toxicity were observed following PUE treatment. Based on our results, we conclude that PUE represents an effective therapeutic option to reduce the risk of gastritis and warrants further study.


2021 ◽  
Vol 39 (15_suppl) ◽  
pp. 11563-11563
Author(s):  
Sant P. Chawla ◽  
Gerald Steven Falchook ◽  
Melissa Amber Burgess ◽  
James Lin Chen ◽  
Robin Lewis Jones ◽  
...  

11563 Background: ES is a rare, aggressive subtype of STS for which cytotoxic chemotherapy has limited effectiveness. TAZ, an FDA-approved EZH2 inhibitor, has shown single-agent clinical activity and a favorable safety profile in patients with metastatic or locally advanced ES. In preclinical studies, TAZ has shown synergistic antitumor activity with DOX, which is often used as frontline treatment for STS. Here, we present results of the phase 1b study (NCT04204941), designed to assess the recommended phase 3 dose (RP3D), safety, and efficacy of TAZ + DOX in patients with advanced STS. Methods: The open-label, phase 1b portion of this study enrolled adult patients with previously untreated advanced STS. A standard 3 + 3 design was used to assess TAZ 400 mg, 600 mg, and 800 mg orally twice daily in combination with DOX (75 mg/m2 intravenously on day 1 of each cycle, for up to 6 cycles) as frontline therapy. Dose-limiting toxicities (DLTs) were predefined in the protocol. The RP3D of TAZ was determined by Scientific Review Committee review of the safety and pharmacokinetic data from the phase 1b trial, with a target DLT rate of < 33%. Results: As of February 1, 2021, 16 patients are enrolled, including 2 with ES; 10 are still receiving TAZ + DOX and 6 have discontinued (5 due to disease progression, 1 due to patient withdrawal). The median age was 49.5 years (range, 29–82) and all had unresectable STS. Median (range) time on treatment was 13 (0.1–51.1+) weeks across all dose levels evaluated. Two DLTs, both of febrile neutropenia, were observed, one in the TAZ 600 mg + DOX cohort (n = 1/6, 17%), and one in the TAZ 800 mg + DOX cohort (n = 1/3, 33%). When used in combination with DOX, the RP3D of TAZ was 800 mg. Grade 3 or 4 treatment-related treatment-emergent adverse events (TR-TEAEs) occurred in 13/16 (81.3%) patients. The most common (≥ 20%) TR-TEAEs were neutropenia (n = 11, 69%), anemia (n = 10, 63%), fatigue (n = 10, 63%), stomatitis (n = 9, 56%), nausea (n = 8, 50%), febrile neutropenia (n = 7, 44%), constipation (n = 6, 38%), vomiting (n = 6, 38%), and decreased appetite (n = 5, 31%). TR-TEAEs were defined as attributable to either study agent. Conclusions: The combination of TAZ + DOX was generally well tolerated in this dose finding study in patients with advanced STS. The RP3D to be tested in the phase 3 randomized, double blind, placebo controlled study is TAZ 800 mg twice daily + DOX. The safety profile of this combination is consistent with the respective safety information for TAZ and for DOX. The TR-TEAEs include known toxicities of DOX or TAZ. Further comparison with DOX + placebo in the phase 3 trial will aid in assessing efficacy and safety of the combination of TAZ + DOX. The global phase 3 confirmatory trial will enroll patients with ES who have unresectable disease and have had no prior systemic therapy. Clinical trial information: NCT04204941.


Author(s):  
Mallikarjuna Rao I. ◽  
Usha Kiran Prayaga ◽  
Dharma Rao Uppada ◽  
Ramachandra Rao E. ◽  
B. L. Kudagi

Background: The SSRIs being used as 1st line therapy in treatment of depression have delayed therapeutic effect which makes the patient vulnerable to an increased risk of suicide and decreased adherence to the treatment and will prematurely discontinue the therapy. The present study was conducted to evaluate if low dose mirtazapine-escitalopram combination therapy has any add on benefit over monotherapy with escitalopram.Methods: In a single-centered, comparative study involving patients with depression attending the out-patient after screening and exclusion, 60 eligible patients were randomly assigned to receive tablet mirtazapine 7.5 mg plus tablet escitalopram 10 mg intervention or tablet escitalopram 10 mg plus placebo intervention in a double-blind 6-week treatment phase. The primary outcome measure was the change in the 17-item Hamilton Depression Rating Scale (HDRS) and Montgomery-Asberg Depression Rating Scale (MADRS) score from baseline. Participants were evaluated at baseline, 1st, 2nd,4th and 6th week. Results were analyzed using Chi-Square test for adverse effects and independent t-test analysis for efficacy parameter.Results: In the analysis of results at 6th week the numbers of patients achieved remission in mirtazapine group are more with a p-value of 0.018 which is significant and the numbers of responders in mirtazapine group are also more which is statistically significant on chi-square test. There is no significant difference was observed between the two groups with reference to occurrence of adverse effect.Conclusions: Adding low dose mirtazapine has an added benefit in terms of efficacy and getting remission early with more number of responders in the treatment of major depression.


2019 ◽  
Vol 6 (Supplement_2) ◽  
pp. S993-S994 ◽  
Author(s):  
Joan Mannick ◽  
Amelia Tomlinson ◽  
Sarb Shergill ◽  
Grace Teo ◽  
Lloyd Klickstein

Abstract Background Respiratory tract infections (RTIs) are a leading cause of hospitalization and death in people age ≥65 years. RTIs are caused by multiple viruses, most of which lack effective treatments. An immunotherapy that enhances pan-antiviral innate immunity may reduce RTI incidence in older adults. Inhibition of targets downstream of target of rapamycin complex 1 (TORC1) was reported to upregulate pan-antiviral gene expression and protect mice from a viral RTI (York AG et al. Cell 2015). We evaluated whether TORC1 inhibition increased antiviral gene expression and decreased RTI incidence in older adults. Methods A randomized, double-blind, placebo, controlled study was conducted to determine whether the TORC1 inhibitor RTB101 alone or in combination with the TORC1 inhibitor everolimus reduced the incidence of laboratory-confirmed RTIs. The study enrolled 652 older adults at increased risk of RTI-related morbidity and mortality (defined as age ≥85 years, or age ≥65 years with asthma, COPD, type 2 diabetes mellitus, or current smokers). Subjects were treated for 16 weeks during winter cold and flu season with oral RTB101 5 mg or 10 mg once daily (QD), RTB101 10 mg twice daily, RTB101 10 mg + everolimus 0.1 mg QD, or matched placebo. The primary endpoint was the percentage of subjects with ≥1 laboratory-confirmed RTI through Week 16. Results RTB101 was well tolerated. In the intent-to-treat analysis, RTB101 10 mg QD was observed to: reduce the percentage of subjects with laboratory-confirmed RTIs by 30.6% compared with placebo (P = 0.025); reduce the incidence of RTIs caused by multiple different viruses; and upregulate interferon-stimulated pan-antiviral gene expression in whole blood (P = 0.00001 vs. placebo, Figure 1). Furthermore, RTB101 10 mg QD was observed to reduce the time to alleviation of moderate to severe RTI symptoms by 5 days, and to reduce the rate of all-cause hospitalization (rate ratio 0.439, 90% CI 0.196–0.983, P = 0.047). Conclusion RTB101 10 mg QD was associated with a significant reduction in laboratory-confirmed RTIs due to multiple viral pathogens that lack effective medicines for treatment or prevention. RTB101 was observed to upregulate interferon-stimulated pan-antiviral gene expression, which may underlie the reduction in RTI incidence. Disclosures Joan Mannick, MD, resTORbio (Employee, Shareholder), Amelia Tomlinson, PhD, resTORbio (Employee), Sarb Shergill, PhD, resTORbio (Employee), Grace Teo, PhD, resTORbio (Employee), Lloyd Klickstein, MD, PhD, resTORbio (Employee).


2019 ◽  
pp. 39-51
Author(s):  
Julián García- Rafanell ◽  
Javier Borja

Antiplatelet agents represent an important part of the therapeutic armamentarium in the prevention of stroke. Among them, aspirin is the gold standard but its chronic use has been associated with gastric intolerance, gastrointestinal and systemic hemorrhages and drug-resistance. Triflusal is a new antiplatelet agent from the family of salicylates but is not derived from aspirin and has a more selective mechanism of action : inhibition of thromboxane A2 in the platelet  with no effect on prostacyclin biosynthesis in the endothelium.  In the quest for the search of new antiplatelet agents, triflusal has shown a similar relative risk reduction than aspirin for the prevention of  stroke but with reduced severe hemorrhagic side effects. The efficacy and better safety profile of triflusal vs aspirin in the secondary prevention of stroke has been demonstrated in major,  randomized and double blind clinical trials and confirmed after a long term study with a mean follow up of 17 years, as well as in  a Cochrane meta-analysis. Aspirin, but not triflusal, increased antihypertensive therapy requirements during long term treatment  in the secondary prevention of stroke. In patients with atrial fibrillation, the combination of oral anticoagulants with triflusal has shown increased efficacy  versus the standard oral single anticoagulation treatment with no increase of haemorrhagic risk.  Studies have shown that the risk of upper gastrointestinal bleeding associated with the use of triflusal was negligible whereas the hemorrhagic risk associated  with the use of aspirin, including low doses aspirin, was evident. Triflusal was well tolerated in asthmatic patients with aspirin-exacerbated –respiratory-diseases. The efficacy of triflusal in secondary prevention of stroke and its better safety profile when compared to aspirin has been recognized in important International Guidelines including the European Stroke Organization Guidelines.


1997 ◽  
Vol 92 (4) ◽  
pp. 361-365 ◽  
Author(s):  
Helen F. Galley ◽  
Judith Thornton ◽  
Peter D. Howdle ◽  
Barry E. Walker ◽  
Nigel R Webster

1. Hypertension affects 30% of adults and low intakes of antioxidants have been associated with increased risk of hypertension and cardiovascular disease. To investigate the effect of short-term high-dose antioxidant supplementation on blood pressure in hypertensive and normotensive outpatients, we undertook a randomized, double-blind, crossover design placebo-controlled study. 2. Forty subjects were recruited from medical outpatient clinics, of whom 38 completed the study. Twenty-one were attending for treatment of hypertension and 17 were normotensive, attending for minor gastrointestinal complaints. Subjects were randomly assigned to receive either 8 weeks placebo followed by 2 weeks washout then 8 weeks antioxidants or vice versa. The combination of antioxidants consisted of 200 mg of zinc sulphate, 500 mg of ascorbic acid, 600 mg of α-tocopherol (sodium succinate salt) and 30 mg of β-carotene daily. 3. Systolic blood pressure fell at the end of the antioxidant phase compared with the placebo phase both in subjects receiving anti-hypertensive therapy (P < 0.01) and those who were normotensive (P = 0.067). Circulating levels of β-carotene and α-tocopherol increased in all subjects during supplementation (P < 0.01) and urine nitrite increased in hypertensive patients (P < 0.05). 4. Short-term oral high-dose combination antioxidant therapy reduces blood pressure, possibly via increased availability of nitric oxide. This study may have implications for the innovative use of antioxidants as an adjunct to anti-hypertensive therapy.


2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Dörte Wolf ◽  
Joachim Otto

Lidocaine is a well-accepted topical anaesthetic, also used in minors to treat painful conditions on mucosal membranes. This randomized, double-blind, placebo-controlled study (registered prospectively as EudraCT number2011-005336-25) was designed to generate efficacy and safety data for a lidocaine gel (2%) in younger children with painful conditions in the oral cavity. One hundred sixty-one children were included in two subgroups: 4–8 years, average age 6.4 years, treated with verum or placebo and 6 months–<4 years, average age 1.8 years, treated only with verum. Pain reduction was measured from the time prior to administration to 10 or 30 minutes after. In addition, adverse events and local tolerability were evaluated. In group I, pain was reduced significantly after treatment with verum compared to placebo at both time points. In group II, the individual pain rating shift showed statistically significant lower pain after treatment. Only seven out of 161 patients reported an adverse event but none were classified as being related to the study medication. The local tolerability was assessed as very good in over 97% of cases. For painful sites in the oral cavity, a 2% lidocaine gel is a meaningful tool for short-term treatment in the paediatric population.


Author(s):  
Xiangyan Ruan ◽  
Alfred O. Mueck

Abstract Doctors and patients fear the risk of breast cancer when using hormone replacement therapy (HRT). This review focuses on the choice of progestogen for HRT in menopausal. The Women’s Health Initiative (WHI) has been the only large double-blind placebo-controlled study testing the risk of breast cancer (BC) using HRT. No increased risk using estrogen (E)-only was seen, there was a significant decrease in mortality due to BC after the use of HRT which persisted during the recent 18-year follow-up of the WHI. In contrast in the combined arm the risk increased. In about 20 observational studies using mostly medroxyprogesterone acetate (MPA) or estradiol-norethisterone acetate (NETA) an increased BC-risk was observed comparable with the WHI. Only for natural progestogen, progesterone and for dydrogesterone (retro-isomer of progesterone) was no increased risk seen for up to 5–8 years, when compared directly with other progestogens, but for longer treatment an increased risk cannot be excluded. In contrast, the mortality due to BC after use of E-only and combined HRT decreased in about a dozen observational studies, and was very recently confirmed in a Finnish study evaluating 490,000 women using estradiol (E2) plus different progestogens. There have been already more than 70 studies evaluating the risk of BC during HRT, and still there are many open questions. Therefore, this review covers our own and other experimental research which could answer important questions. Experimental research has demonstrated that certain synthetic progestogens, but not progesterone and to some extent also not dydrogesterone, can accelerate the proliferation of breast cancer cells in vitro and in animal studies via special cell membrane components which we recently also detected in patients with BC, and we found differences comparing all available synthetic progestogens. Derived from these mechanisms future research may provide screening for patients at risk and predict the prognosis of possible BC.


1999 ◽  
Vol 94 (5) ◽  
pp. 1313-1319 ◽  
Author(s):  
Adriana Diamanti ◽  
Claudio Maino ◽  
Sonia Niveloni ◽  
Silvia Pedreira ◽  
Horacio Vazquez ◽  
...  

1995 ◽  
Vol 82 (1) ◽  
pp. 47-52 ◽  
Author(s):  
Mehernoor F. Watcha ◽  
Paul J. Bras ◽  
Gary D. Cieslak ◽  
John H. Pennant

Background Postoperative nausea and vomiting is a distressing anesthetic complication that may delay discharge after ambulatory surgery. Effective prophylaxis for postoperative nausea and vomiting can be achieved in adults with lower doses of ondansetron, a 5-hydroxytryptamine subtype 3 receptor antagonist, compared with chemotherapy-induced emesis. However, the doses of ondansetron used in preventing postoperative nausea and vomiting in children are based on data from chemotherapy-induced emesis. The dose-related efficacy of intravenous ondansetron in the prophylaxis of postoperative emesis in the pediatric outpatient population was determined. Methods In a double-blind, randomized placebo-controlled study, 130 patients (mean age 5.7 +/- 3.4 yr) received placebo, 10, 50, or 100 micrograms/kg ondansetron during a standardized anesthetic. Episodes of postoperative vomiting or retching were recorded. Results Intravenous ondansetron in a dose of 50 micrograms/kg was more effective than placebo or a dose of 10 micrograms/kg in controlling the incidence and frequency of emesis in the hospital and during the first 24 postoperative hours. Increasing the dose of ondansetron to 100 micrograms/kg intravenously did not significantly reduce the incidence or frequency of emesis compared to 50 micrograms/kg intravenously. Conclusions Intravenous ondansetron in a dose of 50 micrograms/kg is as effective as larger doses for the prophylaxis of emesis in children undergoing surgical procedures known to be associated with an increased risk for postoperative nausea and vomiting.


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