Complex analysis of the national Hereditary angioedema cohort in Slovakia - Identification of 12 novel variants in SERPING1 gene.

Background: Hereditary angioedema (HAE) is a rare autosomal dominant genetic disease characterised by acute episodes of non-pruritic skin and submucosal swelling caused by increase in vascular permeability. Objective: Here we present the first complex analysis of the National HAE Slovakian cohort with the detection of 12 previously un-published genetic variants in SERPING1 gene. Methods: In patients diagnosed with hereditary angioedema caused by deficiency or dysfunction of C1 inhibitor (C1-INH-HAE) based on clinical manifestation and complement measurements, SERPING1 gene was tested by DNA sequencing (Sanger sequencing/massive parallel sequencing) and/or multiplex ligation-dependent probe amplification for detection of large rearrangements. Results: The Slovakian national cohort consisted of 132 living patients with confirmed HAE. We identified 51 index cases (32 families, 19 sporadic patients/112 adults, 20 children). One hundred seventeen patients had HAE caused by deficiency of C1 inhibitor (C1-INH-HAE-1) and 15 patients had HAE caused by dysfunction of C1 inhibitor (C1-INH-HAE-2). The prevalence of HAE in Slovakia has recently been calculated to 1:41 280 which is higher than average calculated prevalence. The estimated incidence was 1:1360 000. Molecular-genetic testing of the SERPING1 gene found 22 unique causal variants in 26 index cases, including 12 previously undescribed and unreported. Conclusion: The first complex report about epidemiology and genetics of the Slovakian national HAE cohort expands the knowledge of the C1-INH-HAE genetics. Twelve novel causal variants were present in the half of the index cases. A higher percentage of inframe variants comparing to other studies was observed. Heterozygous deletion of exon 3 found in a large C1-INH-HAE-1 family probably causes the dysregulation of the splicing isoforms balance and leads to the decrease of full-length C1-INH level.

Initial use of subcutaneous plasma-derived C1 inhibitor in prophylaxis of acute attacks of hereditary angioedema in pregnant patients in Slovakia.

Hereditary angioedema (HAE) is a rare, inborn disease manifested with recurrent attacks of angioedema. They can affect the skin and subcutaneous tissue, mucous membranes (gastrointestinal, respiratory, and uropoietic tracts), and submucous tissue. Women in reproductive age require specific management of the disease regarding both the course of the disease and treatment options. It is not only the treatment in female patients that is specific, but also the situations (pregnancy, breastfeeding). We present a case report of the initial use of a subcutaneous C1 inhibitor in the long-term prophylaxis of HAE attacks in two pregnant patients.

Recombinant human C1 esterase inhibitor for hereditary angioedema attacks: A European registry.

BACKGROUND: Hereditary angioedema (HAE) due to C1 esterase inhibitor deficiency (C1-INH-HAE) is characterized by recurrent swelling attacks. A European treatment registry was established to review the adverse event profile and efficacy of recombinant human C1 esterase inhibitor (rhC1-INH) for HAE attacks. METHODS: Individuals with C1-INH-HAE were enrolled following a decision to treat with rhC1-INH and provision of written informed consent. Medical history and baseline HAE information were collected at screening. Healthcare providers entered data on HAE attacks, response to treatment, and adverse events using a web-based questionnaire. RESULTS: From July 1, 2011, through December 1, 2019, 71 patients with C1-INH-HAE (30 male/41 female; mean age, 47.3 years; age range, 19-78 years) in 9 countries reported 2356 attacks and were treated with rhC1-INH. Before registry entry, patients, including 20 (28.2%) who were on maintenance therapy/prophylaxis at registry enrollment, experienced a mean of 25 HAE attacks per year (median, 16 [range, 0-185]). Most treated HAE attacks were abdominal (46.1%), followed by peripheral (38.3%), oro-facial-pharyngeal (14.8%), urogenital (3.2%), and laryngeal (2.6%). The mean rhC1-INH dose was 3307 U (43.3 U/kg). Patients reported symptom improvement within 4 h for 97.8% of attacks (2305/2356) with rhC1-INH; most attacks (99.8%; 2351/2356) required only 1 dose. Five attacks were treated with a second dose (total rhC1-INH dose administered for attack, 4200 U). No hypersensitivity, thrombotic/thromboembolic events, or drug-related serious adverse events were reported. CONCLUSION: The rhC1-INH treatment registry provided real-world data on the treatment of 2356 HAE attacks that were consistent with clinical trial data of rhC1-INH in patients with C1-INH-HAE.

What is hiden behind autoinflammation?

Autoinflammatory diseases represent a group of disorders that are distinct from autoimmune diseases, infections and malignancies. They are characterised by attacks of unprovoked noninfectious inflammation. A key feature of autoinflammatory diseases is dysregulation of innate immune system and overproduction of pro-inflammatory cytokines. The best-characterized group of autoinflammatory diseases arises from mutations in single genes. They are typically manifested by recurrent attacks of fever and serositis as well as arthralgia, myalgia and skin exanthema.

Weber-Christian disease: a case report.

Weber-Christian disease is a rare disease from the group of chronic fibrosing conditions characterized by inflamma-tion of the adipose tissue - panniculitis and fibrosing with frequent systemic manifestations. Etiopathogenesis of the disease is not fully known, participation of autoimmune mechanisms is anticipated. Here, we report a case of a patient with this rare disease, diagnosed after a long and demanding diagnostic process, including repeated lapa-rotomies. However, after immunosuppressive therapy, clinical and laboratory symptomatology improved rapidly as well as the patients quality of life. Key words: panniculitis - sclerosing mesenteritis - Weber-Christian disease.