1. A genetically determined polymorphism of alpha-1 antitrypsin is demonstrated in dog serum by isoelectric focusing in a pH range of 3.5-5.0, followed by direct immunoblotting using a specific antiserum. 2. Alpha 1 antitrypsin focuses as two major bands at isoelectric points of 4.60 and 4.64 or 4.67 and 4.7 in presumed homozygous animals. Heterozygotes show both sets of bands. 3. The results of seven crosses with 33 offspring are best explained by two codominant alleles, PiM and PiS at a single locus designated as Pi for proteinase inhibitor. 4. The concentration of alpha-1 antitrypsin in serum of healthy dogs was 2.65 +/- 0.42 mg/ml and 2.19 +/- 0.38 mg/ml in females and males respectively. 5. The higher concentration in female dogs suggests that estrogens may influence the serum level of alpha-1 antitrypsin.

Polymorphism of alpha-1 antitrypsin in dogs.

Comparative Biochemistry and Physiology. B, Comparative Biochemistry

Heart failure with reduced ejection fraction (HFrEF) is a clinical syndrome characterized by volume overload, impaired exercise capacity, and recurrent hospital admissions. A major contributor to the pathophysiology and clinical presentation of heart failure is the activation of the renin-angiotensin-aldosterone system (RAAS). Normally, RAAS is responsible for the homeostatic regulation of blood pressure, extracellular fluid volume, and serum sodium concentration. In HFrEF, RAAS gets chronically activated in response to decreased cardiac output, further aggravating the congestion and cardiotoxic effects. Hence, inhibition of RAAS is a major approach in the pharmacologic treatment of those patients. The most recently introduced RAAS antagonizing medication class is angiotensin receptor blocker/ neprilysin inhibitor (ARNI). In this paper, we discuss ARNIs' superiority over traditional RAAS antagonizing agents in reducing heart failure hospitalization and mortality. We also tease out the evidence that shows ARNIs' renoprotective functions in heart failure patients including those with chronic or end stage kidney disease. We also discuss the evidence showing the added benefit resulting from combining ARNIs with a sodium-glucose cotransporter-2 (SGLT-2) inhibitor. Moreover, how ARNIs decrease the risk of arrhythmias and reverse cardiac remodeling, ultimately lowering the risk of cardiovascular death, is also discussed. We then present the positive outcome of ARNIs' use in patients with diabetes mellitus and those recovering from acute decompensated heart failure. ARNIs' side effects are also appreciated and discussed. Taken together, the provided insight and critical appraisal of the evidence justifies and supports the implementation of ARNIs in the guidelines for the treatment of HFrEF.

Angiotensin Receptor Blocker-Neprilysin Inhibitor for Heart Failure with Reduced Ejection Fraction.

Pharmacological Research : the Official Journal of the Italian Pharmacological Society

Hemodynamic Support in Sepsis.

Anesthesiology

Heart failure with preserved ejection fraction (HFpEF) is a clinical syndrome characterised by the presence of diastolic dysfunction and elevated left ventricular filling pressure, in the setting of a left ventricular ejection fraction of at least 50%. Despite the epidemiological prevalence of HFpEF, a prompt diagnosis is challenging and many uncertainties exist. HFpEF is characterised by different phenotypes driven by various cardiac and non-cardiac comorbidities. This is probably the reason why several HFpEF clinical trials in the past did not reach strong outcomes to recommend a single therapy for this syndrome; however, this paradigm has recently changed, and the unmet clinical need for HFpEF treatment found a proper response as a result of a new class of drug, the sodium-glucose cotransporter 2 inhibitors, which beneficially act through the whole spectrum of left ventricular ejection fraction. The aim of this review was to focus on the therapeutic target of HFpEF, the role of new drugs and the potential role of new devices to manage the syndrome.

The Therapy and Management of Heart Failure with Preserved Ejection Fraction: New Insights on Treatment.

Cardiac Failure Review

Respiratory symptoms are ubiquitous and impair health-related quality of life in people with respiratory disease. This European Respiratory Society (ERS) task force aimed to provide recommendations for symptomatic treatment in people with serious respiratory illness.The ERS task force comprised 16 members, including representatives of people with serious respiratory illness and informal caregivers. Seven questions were formulated, six in the "Population, Intervention, Comparison, Outcome" (PICO) format, which were addressed with full systematic reviews and evidence assessed using Grading of Recommendations Assessment, Development and Evaluation (GRADE). One question was addressed narratively. An "evidence-to-decision" framework was used to formulate recommendations.To treat symptoms in people with serious respiratory illness, the task force suggests the use of graded exercise therapy (conditional recommendation, low certainty of evidence); and suggests the use of a multicomponent services, handheld fan and breathing techniques (conditional recommendations, very low certainty of evidence). The task force suggests not to use opioids (conditional recommendation, very low certainty of evidence); and suggests either administering or not administering supplemental oxygen therapy (conditional recommendation, low certainty of evidence). The task force suggests that needs assessment tools may be used as part of a comprehensive needs assessment, but do not replace patient centred care and shared decision making (conditional recommendation, low certainty of evidence). The low certainty of evidence, modest impact of interventions on patient-centred outcomes, and absence of effective strategies to ameliorate cough highlight the need for new approaches to reduce symptoms and enhance wellbeing for individuals who live with serious respiratory illness.

European Respiratory Society Clinical Practice Guideline on symptom management for adults with serious respiratory illness.

European Respiratory Journal

Axillary surgery for patients with breast cancer (BC) in 2024 is becoming increasingly specific, moving away from the previous 'one size fits all' radical approach. The goal is to spare morbidity whilst maintaining oncologic safety. In the upfront surgery setting, a first landmark randomized controlled trial (RCT) on the omission of any surgical axillary staging in patients with unremarkable clinical examination and axillary ultrasound showed non-inferiority to sentinel lymph node (SLN) biopsy (SLNB). The study population consisted of 87.8% postmenopausal patients with estrogen receptor-positive, human epidermal growth factor receptor 2-negative BC. Patients with clinically node-negative breast cancer and up to two positive SLNs can safely be spared axillary dissection (ALND) even in the context of mastectomy or extranodal extension. In patients enrolled in the TAXIS trial, adjuvant systemic treatment was shown to be similar with or without ALND despite the loss of staging information. After neoadjuvant chemotherapy (NACT), targeted lymph node removal with or without SLNB showed a lower false-negative rate to determine nodal pathological complete response (pCR) compared to SLNB alone. However, oncologic outcomes do not appear to differ in patients with nodal pCR determined by either one of the two concepts, according to a recently published global, retrospective, real-world study. Real-world studies generally have a lower level of evidence than RCTs, but they are feasible quickly and with a large sample size. Another global real-world study provides evidence that even patients with residual isolated tumor cells can be safely spared from ALND. In general, few indications for ALND remain. Three randomized controlled trials are ongoing for patients with clinically node-positive BC in the upfront surgery setting and residual disease after NACT. Pending the results of these trials, ALND remains indicated in these patients.

Axillary Surgery for Breast Cancer in 2024.

Cancers

New evidence from 2023 has slightly shifted some perspectives on rheumatoid arthritis (RA) management. Glucocorticoids have reaffirmed their role as bridging therapy, while novel studies on JAK inhibitors have examined efficacy, mechanism of action, and their potential in high-risk populations, bolstering our understanding with real-world data.Additionally, among treatment strategies, achieving low disease activity has emerged as comparable to achieving remission in the long term, and new insights have been gained regarding tapering both biological and conventional synthetic DMARDs. Furthermore, novel approaches have been proposed for managing difficult-to-treat RA and pre-RA. In this paper, the reviewers aim to present the most relevant studies published during the last year in the field of RA management.

Novel insights into the management of rheumatoid arthritis: one year in review 2024.

Clinical and Experimental Rheumatology

The CHEST Antithrombotic Therapy for Venous Thromboembolism Disease evidencebased guidelines are now updated in a more frequent, focused manner. Guidance statements from the most recent full guideline and two subsequent updates have not been gathered into a single source. METHODS An international panel of experts with experience in prior Antithrombotic Therapy guideline development reviewed the 2012 CHEST Antithrombotic Therapy guideline and its two subsequent updates. All guideline statements, and their associated Patient, Intervention, Comparator, Outcome questions were assembled. A modified Delphi process was used to select statements considered relevant to current clinical care. The panel further endorsed minor phrasing changes to match the standard language for guidance statements using the modified GRADE format endorsed by the CHEST Guidelines Oversight Committee. The panel appended comments following statements as deemed relevant, including suggesting which statements be updated in future guidelines due to interval evidence. RESULTS We include 58 guidance statements from prior versions of the antithrombotic therapy guidelines, with updated phrasing as needed to adhere to contemporary nomenclature. Statements are classified as strong or weak recommendations based on high, moderate, and low-certainty evidence, using GRADE methodology. The panel suggests that 5 statements are no longer relevant to current practice. CONCLUSION As CHEST continues to update guidance statements relevant to antithrombotic therapy for VTE disease, this manuscript serves as a unified collection of currently relevant statements from the preceding three guidelines. Suggestions are made to update specific statements in future publications.

Antithrombotic Therapy for VTE Disease: Compendium and Review of CHEST Guidelines 2012-2021.

Chest

Systemic vasculitides comprise a collection of rare and heterogeneous disorders capable of impacting any organ and system, posing a considerable burden of mortality and comorbidity. As with previous annual reviews of this series, this review will offer a critical overview of the latest literature on pathogenesis, biomarkers, and treatment options in both small- and large-vessel vasculitis.

Polymorphism of alpha-1 antitrypsin in dogs.

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