Assessment of joint bleeding and target joints in patients with severe or moderately severe hemophilia B (factor IX ≤2%) receiving prophylaxis with rIX-FP in the PROLONG-9FP clinical trial program.

OBJECTIVE: To assess the impact of prophylaxis with rIX-FP, a fusion protein linking recombinant factor IX (FIX) with human albumin, on joint outcomes. METHODS: Joint outcomes were assessed in pediatric (<12 years) and adult/adolescent (≥12 years) patients receiving rIX-FP prophylaxis every 7, 10, or 14 days; patients (>18 years) well-controlled on a 14-day regimen could switch to a 21-day regimen. Target joints were defined as ≥3 spontaneous bleeds into a single joint within a 6-month period. RESULTS: For adult/adolescent (n = 63) and pediatric (n = 27) patients, median (Q1, Q3) annualized joint bleeding rate was 0.39 (0.00, 2.31), 0.80 (0.00, 2.85), 0.20 (0.00, 2.58), and 0.00 (0.00, 1.78) when treated with 7-, 10-, 14-, or 21-day prophylaxis. 50.0%, 38.9%, 45.5%, and 63.6% of adult/adolescent patients had no joint bleeds when treated with 7-, 10-, 14-, or 21-day prophylaxis, respectively, and 40.7%, 37.5%, and 37.5% of pediatric patients had no joint bleeds when treated with 7-, 10-, or 14-day prophylaxis. Ten adult and two pediatric patients developed target joints; all resolved by the end of the study. CONCLUSION: Prophylaxis with rIX-FP produced low joint bleeding rates and provided excellent hemostatic efficacy in the treatment of joint bleeds. All target joints reported resolved with rIX-FP prophylaxis.

The length of the sanitary napkins can be used as a handier index than pictorial blood loss assessment chart to predict the heavy menstrual bleeding.

AIM: Many women with inherited bleeding disorders are not diagnosed because of a lack of appropriate indicators. This study aimed to assess the predictability of the pictorial blood loss assessment chart (PBAC) as an indicator of menorrhagia and identify an easy indicator of menorrhagia resulting from bleeding disorders. METHODS: A multicenter study enrolled 9 patients with von Willebrand disease (VWD), 23 hemophilia carriers, and 71 controls aged 20-45 years who completed PBACs for two menstrual cycles as well as questionnaires. RESULTS: The PBAC scores of the VWD were significantly higher than those of other groups, even in multivariate analysis with age and sanitary item factors (p = 0.014). A PBAC score of 100 was not an appropriate cutoff because of its low specificity (VWD: sensitivity, 100; specificity, 29.5; hemophilia carriers: 74 and 29.5, respectively). In the ROC analysis, the cutoff of optimal PBAC for VWD was 171 (sensitivity, 66.7; specificity, 72.3; AUC, 0.7296). As the pad length increased, the total length of the pads used during one menstrual period could be a new and easy indicator. However, the cutoff for VWD was 735 cm (sensitivity, 42.9; specificity, 94.3; AUC 0.6837). A threshold could not be established for the hemophilia carrier. Therefore, we multiplied the coefficient by the length of thick pads, which caused a lower PBAC. For the VWD, the sensitivity increased to 85.7 (specificity, 77.1). For the hemophilia carrier, sensitivity (66.7) and specificity (88.6) could be separated from the control. CONCLUSIONS: The total length of the pads with a thick-pad adjustment can be a simple method to identify bleeding disorders.

Clinical conditions and risk factors for inhibitor-development in patients with haemophilia: A decade-long prospective cohort study in Japan, J-HIS2 (Japan Hemophilia Inhibitor Study 2).

BACKGROUND: Inhibitor-development is a serious complication in patients with haemophilia (PwH). Previous studies reported that therapeutic and genetic factors could be associated with these alloantibodies. Relevant clinical features such as genetic-background and different treatment regimens in Japan remain unclear, however. AIMS: To analyse a nation-wide Japanese registry for PwH, and to examine risk factors for inhibitor-development. METHODS AND RESULTS: Newly diagnosed patients with haemophilia A (PwHA) or haemophilia B (PwHB) without inhibitors after 2007, and with treatment records traceable from 0 to 75 exposure days (ED), were enrolled in the Japan Hemophilia Inhibitor Study 2 (J-HIS2) initiated in 2008. Of 417 patients (340 PwHA, 77 PwHB) from 46 facilities, 83 (76 PwHA, 7 PwHB) were recorded with inhibitors by July 2020. Inhibitors were observed in 31.0% of severe PwHA, 8.0% moderate and 1.6% mild and in 17.1% of severe PwHB. The majority of inhibitors (89.7% in severe PwHA and 71.4% in severe PwHB) were detected on or before 25ED (median 12ED in PwHA and 19ED in PwHB). Genotyping in these severe patients identified an association between inhibitor-development and null variants of F8 (P < .01) or F9 (P < .05). A lower incidence of inhibitors was recorded in severe PwHA treated with prophylaxis than in those treated on-demand (P < .01). A past-history of intracranial-haemorrhage appeared to be associated with inhibitor-development, while FVIII-concentrates infusion and routine vaccination on the same day was not related to inhibitor-development. CONCLUSION: The J-HIS2 study has identified significant clinical variables associated with inhibitor-development in Japanese PwH, consistent with other global studies.

Successful Management of Acquired Factor V Inhibitor by Monitoring Factor V Activity, Antigen, and Inhibitor Values during Immunosuppressive Therapy.

Acquired factor V inhibitor (AFVI) results from the formation of autoantibodies to coagulation factor V (FV), and the clinical phenotype can range from asymptomatic laboratory abnormalities to life-threatening bleeds. We describe a 74-year-old man who developed AFVI along with a massive subcutaneous hematoma. He was initially treated with prednisolone (PSL), but AFVI recurred when the dose was reduced after a short period. We subsequently increased the PSL dose and added cyclophosphamide (CY), which resulted in a complete response. We then gradually tapered PSL and stopped CY, and the patient has since remained free of recurrent AFVI symptoms. We monitored FV activity, antigen concentrations, and inhibitor titers of this patient throughout the clinical course. The ratio of FV activity to antigen concentration was low at diagnosis and gradually increased along with the patient's improvement. This ratio might be a useful parameter for evaluating the effects of immunosuppressive therapy in patients with AFVI.

Long-term administration of pegylated liposomal doxorubicin at almost twice the recommended lifetime dose in 10 years without cardiotoxicity in a Japanese patient with HIV-associated Kaposi sarcoma.

We report a Japanese patient with HIV-associated Kaposi sarcoma (KS) who had many cutaneous KS lesions with extensive bilateral groin edema. As the KS was refractory to antiretroviral therapy and pegylated liposomal doxorubicin (PLD), he was administered PLD up to a cumulative dose of 940 mg/m2 in 10 years, which exceeded the recommended lifetime dose (550 mg/m2). However, the patient showed no major adverse events, including cardiotoxicity, and he eventually died of pancreatic cancer.

Factor VIII-Mimetic Function of Humanized Bispecific Antibody in Hemophilia A.

BACKGROUND: In patients with severe hemophilia A, standard treatment is regular prophylactic and episodic intravenous infusions of factor VIII. However, these treatments are burdensome, especially for children, and may lead to the formation of anti-factor VIII alloantibodies (factor VIII inhibitors). Emicizumab (ACE910), a humanized bispecific antibody mimicking the cofactor function of factor VIII, was developed to abate these problems. METHODS: We enrolled 18 Japanese patients with severe hemophilia A (with or without factor VIII inhibitors) in an open-label, nonrandomized, interindividual dose-escalation study of emicizumab. The patients received subcutaneous emicizumab weekly for 12 weeks at a dose of 0.3, 1.0, or 3.0 mg per kilogram of body weight (cohorts 1, 2, and 3, respectively). The end points were safety and pharmacokinetic and pharmacodynamic profiles. An additional, exploratory end point was the annualized bleeding rate, calculated as 365.25 times the number of bleeding episodes, divided by the number of days in the treatment period as compared with the 6 months before enrollment. RESULTS: Emicizumab was associated with neither serious adverse events nor clinically relevant coagulation abnormalities. Plasma concentrations of emicizumab increased in a dose-dependent manner. Activated partial-thromboplastin times remained short throughout the study. The median annualized bleeding rates in cohorts 1, 2, and 3 decreased from 32.5 to 4.4, 18.3 to 0.0, and 15.2 to 0.0, respectively. There was no bleeding in 8 of 11 patients with factor VIII inhibitors (73%) and in 5 of 7 patients without factor VIII inhibitors (71%). Episodic use of clotting factors to control bleeding was reduced. Antibodies to emicizumab did not develop. CONCLUSIONS: Once-weekly subcutaneous administration of emicizumab markedly decreased the bleeding rate in patients who had hemophilia A with or without factor VIII inhibitors. (Funded by Chugai Pharmaceutical; JapicCTI number, 121934.).

Postmarketing safety and effectiveness of recombinant factor IX (nonacog alfa) in Japanese patients with haemophilia B.

INTRODUCTION: In 2010, nonacog alfa became the first recombinant factor IX (rFIX) available in Japan for patients with haemophilia B. AIM: To determine real-world safety (adverse events, incidence of inhibitors) and effectiveness of nonacog alfa in Japan. METHODS: This multicentre, prospective, observational, postmarketing surveillance study enrolled previously treated and untreated patients (PTPs and PUPs, respectively) who were observed for 1 and 2 years, respectively, after initiating nonacog alfa therapy. Safety and effectiveness were assessed for each treatment type. Annualized bleeding rate (ABR) and incremental recovery of rFIX were also evaluated. RESULTS: Overall, 312 of 314 patients enrolled from 173 sites were eligible for the safety analysis set (PTPs, 281; PUPs, 28; other, 3). Mean age was 25.4 (PTPs) and 14.8 (PUPs) years. Haemophilic severity ranged from mild to severe, and 133 (42.6%) patients had haemophilic arthropathy. Of 285 patients (PTPs, 257; PUPs, 28) in the effectiveness set, 112 received on-demand treatment for 1161 bleeding episodes (effectiveness rate, 93.7%) and 185 received routine prophylaxis (effectiveness rate, 95.5%). No spontaneous bleeding was observed in 52.4% of patients during prophylactic treatment. Median ABR was lower during routine prophylaxis (2.0) vs the rest of the observation period (8.3). A weak negative correlation was found between body weight and the reciprocal of rFIX recovery. Eleven adverse drug reactions occurred in 7 PTPs (2.2% [7/312]); recurrence of inhibitor was observed in 1 patient, but no new inhibitor developed in PTPs or PUPs. CONCLUSION: Nonacog alfa therapy is safe and effective in the real-world scenario in Japan.

Ischaemic events are rare, and the prevalence of hypertension is not high in Japanese adults with haemophilia: First multicentre study in Asia.

INTRODUCTION: With the increasing life expectancy of patients with haemophilia (PWH), the number of PWH with age-related comorbidities, such as ischaemic events, is increasing. AIM: We conducted this multicentre observational study to identify the risk factors for major ischaemic events in PWH. METHODS: This study was the first multicentre observational study, conducted with the participation of five haemophilia treatment centres in Japan, conducted in ≥30-year-old adult PWH. The latest data recorded in the medical charts between 1 January and 31 December 2016 were reviewed. Healthcare data collected from the National Health and Nutrition Survey were used as the control data. RESULTS: Data of a total of 711 patients were collected. Only two PWH (0.3%) had a history of ischaemic events. Age-adjusted analysis indicated that the prevalence of hypertension defined as a blood pressure of 140/90 mm Hg or over was similar in the PWH to that in the males of the general population. However, when hypertension was defined more strictly (≥130/85 mm Hg), the prevalence was significantly lower in PWH than in the general male population. The hypertension in PWH was associated with the age, BMI, CKD, HIV infection and inhibitors. In particular, the odds ratio for the presence of inhibitors was high (odds ratio = 7.529). CONCLUSION: Whether the present results can be attributed to Japanese ethnicity or to the presence of haemophilia per se remains uncertain. We propose to initiate a prospective study for further investigation.

[Exhaustive analysis of genetic mutations associated with protein S deficiency utilizing next-generation sequencing analysis].

Protein S (PS) gene (PROS1) is found on chromosome 3 (3q11.1). To date, the reported detection rate of causative gene mutations in patients suspected of PS deficiency is only approximately 50%. To improve the detection rate of causative mutations, an exhaustive analysis of PROS1 was attempted using the next-generation sequencing method (NGS) to analyze the entire nucleotide sequence of PROS1 without analyzing those affected by pseudogenes. A total of 10 different mutations (three males and six females (52.9%) out of 17 patients (3 males and 14 females) with clinical PS deficiency were identified in this study. Remarkable improvements in the detection rate of causative mutations could not be obtained even with NGS analysis. These results suggested that the rate of diagnosis did not improve even after performing an exhaustive genetic analysis in patients clinically diagnosed with low PS antigen level and/or low PS activity. Although no reports were found on the gender gap in the rate of gene diagnosis for PS deficiency, the fluctuation of estrogen levels especially in women might cause a lower rate of diagnosis.

[Undetectable anti-platelet factor 4/heparin antibodies with IgG-specific chemiluminescent immunoassays in a heparin-induced thrombocytopenia patient].

A 51-year-old man with a 9-month history of narrowing of visual fields and papilledema was admitted to the Department of Neurosurgery. Upon admission, glycerol was intravenously administered and heparin flushes were initiated to maintain intravenous access. Brain MRI revealed right transverse and sigmoid sinus thrombosis on hospital day 2, and the patient was treated with unfractionated heparin. On hospital day 9, the patient had a seizure and impaired mental status. Moreover, on hospital day 10, the platelet count decreased to less than half compared with that documented upon admission. The patient was then switched from heparin to argatroban because thrombosis exacerbation due to heparin-induced thrombocytopenia (HIT) was suspected. Despite negative IgG-specific chemiluminescent immunoassay for anti-platelet factor 4 (PF4) /heparin antibodies, positive functional assay led to the diagnosis of HIT. Warfarin was initiated and the platelet count was restored. Because maintaining the patient's PT-INR within the therapeutic range was difficult probably due to concomitant antimicrobial administration for complicating pneumonia, anticoagulation was switched to rivaroxaban. No bleeding or thrombotic complications developed. Thus, the presentation and clinical course should be considered for an accurate diagnosis of HIT. This is particularly important when the immunological assay is negative for anti-PF4/heparin antibodies. Furthermore, anticoagulation with rivaroxaban can be useful in the management of the subacute phase of HIT.

Emicizumab-mediated haemostatic function in patients with haemophilia A is down-regulated by activated protein C through inactivation of activated factor V.

Activated protein C (APC) inactivates activated factor V (FVa) and moderates FVIIIa by restricting FV cofactor function. Emicizumab is a humanized anti-FIXa/FX bispecific monoclonal antibody that mimicks FVIIIa cofactor function. In recent clinical trials in haemophilia A patients, once-weekly subcutaneous administration of emicizumab was remarkably effective in preventing bleeding events, but the mechanisms controlling the regulation of emicizumab-mediated haemostasis remain to be explored. We investigated the role of APC-mediated reactions in these circumstances. APC dose-dependently depressed thrombin generation (TG) initiated by emicizumab in FVIII-deficient plasmas, and in normal plasmas preincubated with an anti-FVIII antibody (FVIII-depleted). FVIIIa-independent FXa generation with emicizumab was not affected by the presence of APC, protein S and FV. The results suggested that APC-induced down-regulation of emicizumab-dependent TG was accomplished by direct inactivation of FVa. The addition of APC to emicizumab mixed with FVIII-depleted FV-deficient plasma in the presence of various concentrations of exogenous FV demonstrated similar attenuation of TG, irrespective of specific FV concentrations. Emicizumab-related TG in FVIII-depleted FVLeiden plasma was decreased by APC more than that observed with native FVLeiden plasma. The findings indicated that emicizumab-driven haemostasis was down regulated by APC-mediated FVa inactivation in plasma from haemophilia A patients without or with FV defects.

Developing the First Recombinant Factor XIII for Congenital Factor XIII Deficiency: Clinical Challenges and Successes.

Congenital factor XIII (FXIII) deficiency is a rare, autosomal recessive bleeding disorder with potentially life-threatening consequences. FXIII is composed of two subunits (A and B), and a deficiency or dysfunction of either can result in FXIII deficiency. Traditionally, FXIII deficiency has been managed by infusing plasma-derived products containing FXIII (fresh frozen plasma, cryoprecipitate, and plasma-derived FXIII concentrates), all of which contain both subunits. Despite the increased safety of plasma-derived products, concern remains regarding potential viral safety issues. This review describes the development, from concept to clinical use, of a recombinant FXIII molecule (containing subunit A only; rFXIII-A2) for congenital FXIII-A subunit deficiency. Unmet needs and ongoing challenges in congenital FXIII deficiency are also discussed. Despite the challenges in developing a product for a very rare bleeding disorder, the information gathered on efficacy, safety, and pharmacokinetics of FXIII replacement therapy represents the largest dataset on congenital FXIII-A subunit deficiency in the world. It also provides evidence for the safety and efficacy of monthly prophylaxis with 35 IU/kg of rFXIII-A2 in patients with FXIII-A subunit deficiency. The issues encountered and overcome, along with lessons learned, may be applied to and encourage the development of new recombinant products for other rare bleeding disorders.

[Investigation of the Pathophysiology and Diagnostic Methods Through a Case of Acute HIV Infection in which the Western Blot Method Remained Negative Over the Long Term and the 4th Generation Screening Assay Became Negative for a Certain Period of Time after Initiating Antiretroviral Therapy].

Confirmatory tests using Western blot (WB) and HIV-1 nucleic acid testing (HIV-1 RNA) following a positive screening test are required for the diagnosis of HIV-1 infection according to the current Japanese guidelines for HIV-1/2 diagnosis. We report herein on a rare case in a patient who remained negative for WB over 10 months in spite of being positive by fourth-generation immunoassays (4thGIA) and who subsequently seroreverted by 4thGIA for three months after initiating antiretroviral therapy. Case: A man in his early twenties previously visited a hospital because of fever in October 2012. Laboratory data revealed leukocytopenia, thrombocytopenia and increased serum ferritin, suggesting hemophagocytic syndrome (HPS). During that visit, he tested positive for a 4thGIA, but negative for HIV-1 WB and his result of HIV-1 RNA result was detected invalid because of the presence of some inhibitory material in his RNA preparation. Thereafter, he was diagnosed as having cytomegalovirus-associated HPS treatment was for which initiated. In January 2013, he developed Pneumocystis jirovecii pneumonia, and his HIV-1 RNA viral load was 7.7 × 105 copies/mL in February 2013. Acute HIV infection was suspected, because the HIV-1 WB remained negative. He was started on antiretroviral therapy in April 2013. His 4thGIA was converted to negative in May 2013 and was reconverted to positive in August 2013. HIV-1 WB, however, continued to be indeterminant until February 2014, in which it turned positive for the first time according to the CDC criteria. Methods and Results: The genetic analyses of HIV-1 were done on the gag, env, nef and pol region of the HIV-1 gene from the patient. There was no clear element to delay antibody production on the virus side. Preserved specimens of the patient were measured with eight kinds of HIV screening assay. It was thought that the fourth generation assay was positive only by the presence of the antigen until March 2013 because the antibody had not been detected. Discussion: We encountered a case of acute HIV infection in which the WB result was negative for 10 months after the first positive response of the 4thGIA. The 4thGIA is essential for the early diagnosis and early treatment of HIV infection; therefore, the 4thGIA should be strictly recommended to avoid the use of older generations of immunoassay in the diagnostic guidelines. The role of the WB test should be examined closely from various aspects for use as a confirmatory test under recent laboratory situations in which highly sensitive and specific methods, e.g. the 4th GIA, have become available. In addition, unnecessary confusion due to the diversities of antibody formation should be avoided. The antibody detection tests for HIV are still necessary and indispensable for the confirmation of the disease or the diagnosis of the acute infection stage. Therefore development of a newer antibody measuring method which could achieve an easier operation and should have a higher sensitivity and specificity for HIV confirmation is strongly expected.

Novel FV mutation (W1920R, FVNara) associated with serious deep vein thrombosis and more potent APC resistance relative to FVLeiden.

Factor V (FV) appears to be pivotal in both procoagulant and anticoagulant mechanisms. A novel homozygote (FVNara), a novel mechanism of thrombosis associated with Trp1920→Arg (W1920R), was found in a Japanese boy and was associated with serious deep vein thrombosis despite a low level of plasma FV activity (10 IU/dL). Activated partial thromboplastin time-based clotting assays and thrombin generation assays showed that FVNara was resistant to activated protein C (APC). Reduced susceptibility of FVaNara to APC-catalyzed inactivation and impaired APC cofactor activity of FVNara on APC-catalyzed FVIIIa inactivation contributed to the APC resistance (APCR). Mixtures of FV-deficient plasma and recombinant FV-W1920R confirmed that the mutation governed the APCR of FVNara. APC-catalyzed inactivation of FVa-W1920R was significantly weakened, by ~11- and ~4.5-fold, compared with that of FV-wild-type (WT) and FVLeiden (R506Q), respectively, through markedly delayed cleavage at Arg506 and little cleavage at Arg306, consistent with the significantly impaired APC-catalyzed inactivation. The rate of APC-catalyzed FVIIIa inactivation with FV-W1920R was similar to that without FV, suggesting a loss of APC cofactor activity. FV-W1920R bound to phospholipids, similar to FV-WT. In conclusion, relative to FVLeiden, the more potent APCR of FVNara resulted from significant loss of FVa susceptibility to APC and APC cofactor activity, mediated by possible failure of interaction with APC and/or protein S.

[Syphilis Testing and High Rate of Infection Among HIV-infected Patients].

Background: The incidence of syphilis has globally increased over the last decade, particularly among men who have sex with men coinfected with the human immunodeficiency virus (HIV). HIV infection may make the clinical symptoms and seroreactivity of syphilis atypical, which requires careful consideration in terms of diagnoses and treatments by clinicians. Syphilis is known as a great imitator, and is often difficult to be diagnosed or it can be overlooked if clinicians depend only on its symptoms or signs. It is also highly contagious and could be transmitted without sexual intercourse, and reinfection is common. Guidelines recommend that all HIV-infected persons be provided with STD screening, including syphilis, at least annually. However, to our knowledge, there are no published data on the actual frequency of testing and instances of syphilis among HIV-infected persons in Japan. Materials and Methods: We collected data from HIV infected male patients who had sex with men (MSM) at Tokyo Medical University Hospital from June 2011 to June 2012. Data from the patients, who had been tested with the rapid plasma reagin assay (RPR) at least once during the study period, were retrospectively obtained from clinical records and were analyzed. Results: Among 1000 patients with HIV infection, 935 patients were MSM. 723 patients (77.4%) were tested using the Treponema pallidum latex agglutination test (TPLA) and RPR more than once during the study period. Out of the 723 patients, 443 patients (61.3%) were reactive for TPLA and 238 patients (32.9%) had reactive tests for RPR. All patients who were reactive for RPR were reactive for TPLA. Among the patients who were reactive for RPR, 93 patients (12.9%) were considered newly diagnosed or with a repeat infection. In this cohort, all patients were MSM with a median age of 37 years, and a median CD4+T-lymphocyte cell count of 465/uL. A total of 76 patients had been prescribed antiretroviral therapy, and 61 patients had a documented HIV-1 RNA viral load of <40 copies/mL at their most recent test. Two patients both developed two episodes of syphilis during the study period. Of the 95 episodes, 44% were symptomatic syphilis and the most common symptom among them was a skin rash at the second stage. Nearly half of the patients (47%) were diagnosed at regular screenings. Two thirds (67%) had syphilis infections before the study period, whereas at least 20% of them were newly diagnosed during the study period. Conclusions: A substantial percentage of the participants were newly or recurrently diagnosed with syphilis during the study period. More public health awareness should be encouraged regarding the current epidemic of syphilis among HIV-infected persons in Japan. It is also important for clinicians to provide HIV-infected persons with periodical syphilis screening, regardless of the apparent clinical signs or symptoms to achieve earlier treatment intervention.

[Companion Diagnostics for Selecting Antiretroviral Drugs against HIV-1].

Currently, the treatment of human immunodeficiency virus involves combination therapy, as antiretroviral therapy(ART). The treatment has improved steadily since the advent of potent combination therapy in 1996. New drugs that offer new mechanisms of action, improvements in potency and activity even against multidrug-resistant viruses, dosing convenience, and tolerability have been approved. Among ART with useful drugs, there are two important examinations before starting the treatment using the two kinds of drug. CCR5 co-receptor antagonists, maraviroc, prevent HIV entry into target cells by binding to CCR5 receptors. Genotypic assays have been developed that can determine or predict the co-receptor tropism(i.e., CCR5, CXCR4, or both) of the patient's dominant virus population. The assay for HIV-1 co-receptor usage should be performed whenever the use of a CCR5 antagonist is being considered. One of the nucleoside/nucleotide reverse transcriptase inhibitors (NRTIs), abacavir, is an important agent to develop recommended regimens for antiretroviral therapy. Serious and sometimes fatal hypersensitivity reactions have been associated with abacavir-containing products, ZIAGEN, Epzicom, and Triumeq. Patients who carry the HLA-B*5701 allele are at high-risk of a hypersensitivity reaction to abacavir. Prior to initiating therapy with abacavir, performing a screening test for the HLA-B*5701 allele is recommended. [Review].

Classification of human immunodeficiency virus-infected patients with chronic kidney disease using a combination of proteinuria and estimated glomerular filtration rate.

BACKGROUND: In 2012, the Kidney Disease: Improving Global Outcomes (KDIGO) updated the 2002 Kidney Disease Outcomes Quality Initiative (KDOQI) clinical practice guideline for chronic kidney disease (CKD). The 2012 KDIGO guideline elaborated the identification and prognosis of CKD by combining albuminuria with estimated glomerular filtration rate (eGFR). Identification of CKD with a high risk for a poor prognosis was investigated in human immunodeficiency virus (HIV)-infected individuals by applying the new guideline. METHODS: A total of 1,447 HIV-infected patients (1,351 male, 96 female; mean age 44.4 ± 11.5 years) were classified using a combination of eGFR and dipstick proteinuria, as a convenient alternative to albuminuria. Proteinuria was classified into 3 grades-(A1) - and +/- , (A2) 1+ and 2+ , and (A3) 3+ and 4+. eGFR was classified into 6 grades-(G1) ≤90, (G2) 60-89, (G3a) 45-59, (G3b) 30-44, (G4) 15-29, and (G5) <15 mL/min/1.73 m(2). RESULTS: Mean CD4 cell count was 487 ± 214 /µL, with 80.7 % of patients having an undetectable HIV-RNA level. The prevalence of CKD stage ≤2 and stage ≥3 classified according to KDOQI staging was 93.4 and 6.6 %, respectively. Using the new KDIGO classification, the prevalence of CKD with either a low (green) or moderately increased (yellow) risk was 96.9 %, while the prevalence for a high (orange) and very high (red) risk was 3.1 %. CONCLUSION: The use of the new KDIGO classification may reduce the prevalence of HIV-infected CKD individuals who are at high risk for a poor prognosis by nearly a half.

Integrating musculoskeletal ultrasound as a shared decision-making tool in hemophilia care: observations from a 3-year study.

Background: Hemophilia significantly impacts joint health, necessitating innovative strategies for early detection and management of joint damage. Objectives: This study assessed the impact of incorporating musculoskeletal ultrasound (MSKUS) into shared decision-making processes on prophylaxis regimens for patients with hemophilia over a 3-year period. Methods: The "Joint Damage Monitoring by Ultrasonography in Patients with Hemophilia in Japan" study was a long-term prospective observational study conducted at Ogikubo Hospital, Tokyo, Japan. It enrolled 174 participants with moderate-to-severe hemophilia A or B. Participants underwent 6 monthly MSKUS evaluations, generating 3582 images from 682 joints; the findings guided adjustments of prophylaxis. Results: Over the 3-year period, 69.3% of participants adjusted their prophylaxis regimen at least once. Adherence, defined as the ratio of the prescribed to the actual frequency of prophylaxis administration as agreed upon by physicians and patients, was high at the beginning of the study, with an average of 91.6%, and remained high after 3 years at 94.7%. The HEAD-US scores for elbows, knees, and ankles significantly improved (all P < .0001). The spontaneous annual joint bleeding rate and Hemophilia Joint Health Scores also significantly improved (P = .001 and P = .004, respectively). Synovitis detection decreased from 12.9% to 1.6%, with the majority of identified synovitis being subclinical (11.7%) and not associated with bleeding events in the 6 months preceding detection. Conclusion: Integrating MSKUS into hemophilia care as a shared decision-making tool significantly facilitates the early detection of joint damage and supports personalized prophylaxis adjustments, markedly improving patient outcomes.