BACKGROUND: Severe combined immunodeficiency (SCID) is a fatal but treatable inborn error of immunity (IEI). Newborn screening (NBS) using T-cell receptor excision circles (TREC) has been adopted globally, with very few countries incorporating kappa recombination excision circles (KREC) to also detect early B-cell development disorders, such as X-linked agammaglobulinemia (XLA). OBJECTIVE: To evaluate the effectiveness of a 2-year pilot SCID NBS program in the Czech Republic, emphasising the utility of combined TREC/KREC screening. METHODS: Between January 2022 and December 2023, a dual TREC/KREC NBS pilot was conducted across the Czech Republic, alongside spinal muscular atrophy (SMA) screening. Approximately 200,000 newborns were screened using quantitative real-time PCR on dried blood spots collected 48-72 h after birth. RESULTS: The pilot referred 58 newborns, identifying 21 cases of IEI, including two SCID cases, with an overall incidence of TREC/KREC screenable IEI of 10.5/100,000 newborns. SCID incidence was 1/100,000. KREC screening proved invaluable, detecting 10 cases of congenital agammaglobulinemia including novel non-XLA forms, which increased the estimated incidence of agammaglobulinemia in the Czech Republic sixfold. Over one-third of low KREC results were linked to maternal immunosuppression. CONCLUSION: The Czech pilot demonstrated the effectiveness of integrated TREC/KREC NBS in detecting both T- and B-cell immunodeficiencies. As of 2024, SCID and SMA screening are included in the nationwide NBS, with KREC screening significantly improving early detection of B-cell disorders.

• MeSH
• agamaglobulinemie diagnóza   MeSH
• B-lymfocyty imunologie   MeSH
• genetické nemoci vázané na chromozom X MeSH
• lidé MeSH
• novorozenec MeSH
• novorozenecký screening * metody   MeSH
• pilotní projekty MeSH
• receptory antigenů T-buněk * genetika   MeSH
• těžká kombinovaná imunodeficience * diagnóza   genetika   epidemiologie   MeSH
• Check Tag
• lidé MeSH
• mužské pohlaví MeSH
• novorozenec MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH
• Geografické názvy
• Česká republika MeSH

INTRODUCTION: Early and lifelong treatment is essential in patients with familial hypercholesterolaemia (FH) due to genetically elevated low-density lipoprotein cholesterol (LDL-C) from the first years of life. In women with FH, lipid-lowering treatment is interrupted during childbearing years due to contraindication of the medication during conception, pregnancy and breastfeeding. However, little is known about the impact of breastfeeding on lipid profile and other risk markers for atherosclerotic cardiovascular disease (ASCVD) in women with FH compared with women without hypercholesterolaemia, and to what extent statins transfer into breast milk.We aim to investigate (1) the association between breastfeeding and serum lipid profile in women with and without FH; (2) the association between breastfeeding and other ASCVD risk markers in women with and without FH and (3) the concentration of statins in breast milk of women with FH. METHODS AND ANALYSIS: FH-FEMINA is a prospective study aiming to include 50 women with FH in Norway, the Netherlands and the Czech Republic. Additionally, 20 women without hypercholesterolaemia will be enrolled as a control group in Norway. Women will be included at the first study visit in gestational week 36, and follow-up visits will be scheduled at 2-4 weeks, and at 3, 6, 9 and 12 months postpartum. Information on lifestyle factors, treatment history and current and previous pregnancies will be collected. At each visit, a non-fasting blood sample, breast milk sample and information on diet, body mass index and blood pressure will be collected. Additional blood samples will be collected from the women with FH at 2, 4, 5, 7, 8, 10 and 11 months postpartum for as long as they are breastfeeding. At (re-)initiation of statin treatment, breast milk samples from women with FH will be collected for drug concentration measurements. ETHICS AND DISSEMINATION: Ethical approval will be obtained prior to study start in all three countries. Participants will be informed about the study and receive ample time to ask questions before the informed consent form is signed. The findings from this study will be disseminated to healthcare professionals, researchers and patients via peer-reviewed scientific article(s), conferences, patient organisations and social media. TRIAL REGISTRATION NUMBER: NCT05367310.

• MeSH
• biologické markery krev   MeSH
• dospělí MeSH
• hyperlipoproteinemie typ II * krev   farmakoterapie   komplikace   MeSH
• kardiovaskulární nemoci * MeSH
• kojení * MeSH
• lidé MeSH
• lipidy * krev   MeSH
• mateřské mléko * chemie   metabolismus   MeSH
• prospektivní studie MeSH
• rizikové faktory kardiovaskulárních chorob MeSH
• statiny * terapeutické užití   MeSH
• Check Tag
• dospělí MeSH
• lidé MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH
• protokol klinické studie MeSH
• Geografické názvy
• Česká republika MeSH
• Nizozemsko MeSH
• Norsko MeSH

BACKGROUND AND AIMS: Overweight and obesity are modifiable risk factors for atherosclerotic cardiovascular disease (ASCVD) in the general population, but their prevalence in individuals with heterozygous familial hypercholesterolaemia (HeFH) and whether they confer additional risk of ASCVD independent of LDL cholesterol (LDL-C) remains unclear. METHODS: Cross-sectional analysis was conducted in 35 540 patients with HeFH across 50 countries, in the EAS FH Studies Collaboration registry. Prevalence of World Health Organization-defined body mass index categories was investigated in adults (n = 29 265) and children/adolescents (n = 6275); and their association with prevalent ASCVD. RESULTS: Globally, 52% of adults and 27% of children with HeFH were overweight or obese, with the highest prevalence noted in Northern Africa/Western Asia. A higher overweight/obesity prevalence was found in non-high-income vs. high-income countries. Median age at familial hypercholesterolaemia diagnosis in adults with obesity was 9 years older than in normal weight adults. Obesity was associated with a more atherogenic lipid profile independent of lipid-lowering medication. Prevalence of coronary artery disease increased progressively across body mass index categories in both children and adults. Compared with normal weight, obesity was associated with higher odds of coronary artery disease in children (odds ratio 9.28, 95% confidence interval 1.77-48.77, adjusted for age, sex, lipids, and lipid-lowering medication) and coronary artery disease and stroke in adults (odds ratio 2.35, 95% confidence interval 2.10-2.63 and odds ratio 1.65, 95% confidence interval 1.27-2.14, respectively), but less consistently with peripheral artery disease. Adjusting for diabetes, hypertension and smoking modestly attenuated the associations. CONCLUSIONS: Overweight and obesity are common in patients with HeFH and contribute to ASCVD risk from childhood, independent of LDL-C and lipid-lowering medication. Sustained body weight management is needed to reduce the risk of ASCVD in HeFH.

• MeSH
• dítě MeSH
• dospělí MeSH
• heterozygot MeSH
• hyperlipoproteinemie typ II * epidemiologie   komplikace   MeSH
• index tělesné hmotnosti MeSH
• kardiovaskulární nemoci epidemiologie   etiologie   MeSH
• LDL-cholesterol krev   metabolismus   MeSH
• lidé středního věku MeSH
• lidé MeSH
• mladiství MeSH
• mladý dospělý MeSH
• nadváha * epidemiologie   komplikace   MeSH
• obezita * komplikace   epidemiologie   MeSH
• prevalence MeSH
• průřezové studie MeSH
• registrace * MeSH
• rizikové faktory MeSH
• Check Tag
• dítě MeSH
• dospělí MeSH
• lidé středního věku MeSH
• lidé MeSH
• mladiství MeSH
• mladý dospělý MeSH
• mužské pohlaví MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH
• multicentrická studie MeSH

BACKGROUND: Familial dysbetalipoproteinemia (FD) is an autosomal recessive (rarely dominant) inherited disorder that is almost exclusively associated with the apolipoprotein E gene (APOE) variability. Nonetheless, only a small proportion of APOE2/E2 subjects develop the phenotype for mixed dyslipidemia; the context of other trigger metabolic or genetic factors remains unknown. METHODS: One hundred and one patients with FD and eighty controls (all APOE2/E2 homozygotes; rs429358) were screened for 18 single-nucleotide polymorphisms (SNPs) within the genes involved in triglyceride metabolism. RESULTS: Two SNPs were significantly associated with the FD phenotype (rs439401 within APOE; P < 0.0005 and rs964184 within ZPR1/APOA5/A4/C3/A1 gene cluster; P < 0.0001). Unweighted genetic risk scores - from these two SNPs (GRS2), and, also, additional 13 SNPs with P-value below 0.9 (GRS15) - were created as an additional tool to improve the risk estimation of FD development in subjects with the APOE2/E2 genotype. Both GRS2 and GRS15 were significantly (P < 0.0001) increased in patients and both GRSs discriminated almost identically between the groups (P = 0.86). Subjects with an unweighted GRS2 of three or more had an almost four-fold higher risk of FD development than other individuals (odds ratio (OR) 3.58, 95% confidence interva (CI): 1.78-7.18, P < 0.0005). CONCLUSIONS: We identified several SNPs that are individual additive factors influencing FD development. The use of unweighted GRS2 is a simple and clinically relevant tool that further improves the prediction of FD in APOE2/E2 homozygotes with corresponding biochemical characteristics.

• MeSH
• apolipoprotein E2 * genetika   MeSH
• apolipoproteiny E genetika   MeSH
• dospělí MeSH
• genetická predispozice k nemoci * MeSH
• genetické rizikové skóre MeSH
• genotyp * MeSH
• hyperlipoproteinemie typ III genetika   MeSH
• jednonukleotidový polymorfismus * MeSH
• lidé středního věku MeSH
• lidé MeSH
• rizikové faktory MeSH
• studie případů a kontrol MeSH
• Check Tag
• dospělí MeSH
• lidé středního věku MeSH
• lidé MeSH
• mužské pohlaví MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH

Frekvence familiární hypercholesterolémie (FH) je u většiny populací asi 1/200 a je tedy možné předpokládat, že v ČR by mohlo být postiženo přibližně 50 000 osob. Řešení projektu lze rozdělit do dvou pracovních bloků (PB). PB1 je zaměřen na funkční analýzu variant genu LDLR in vitro a využívá metod průtokové cytometrie, konfokální mikroskopie na živých buňkách, qRT-PCR a sestřihových minigenových testů. Varianty LDLR budou hodnoceny na úrovni exprese, zrání, lokalizace a funkce daného proteinu a na úrovni buněčné odpovědi (aktivace tzv. unfolded protein response). PB2 je zaměřen na analýzu DNA pacientů. Metodou NGS bude provedena re-analýza pacientů s FH s dosud negativní genetickou diagnózou a budou aplikovány metody pro stanovení počtu repetic Kringle IV v genu LPA (PFGE a Southernova hybridizace) pro rozřazení pacientů do skupiny s nižšími nebo vyšší riziky předčasné aterosklerózy. Všechny uvedené přístupy mají společný cíl – identifikovat genetické varianty způsobující FH a získat nové informace o patogenitě FH.; The frequency of familial hypercholesterolemia (FH) in most populations is about 1/200, and so it is possible to predict that about 50,000 people could be affected by FH in the Czech Republic. The project solution can be divided into two work packages (WP). WP1 is focused on functional analysis of LDLR variants in vitro and methods as flow cytometry, live cell imaging microscopy, qRT-PCR, splicing minigene assay will be applied. LDLR variants will be evaluated on level of protein expression, maturation, localisation, function, and cell response (activation of the unfolded protein response). WP2 is focused on analysis of patients ́ DNA. Re-analysis of FH patients with so far negative genetic diagnosis will be performed by NGS, and methods for determination of the Kringle IV repeat number in the LPA gene (PFGE and Southern hybridisation) will be applied for stratification of patients into a group with lower or higher risk of premature atherosclerosis. All mentioned approaches have a common goal – to identify FH disease-causing variants and obtain new information about FH pathogenicity.

• Klíčová slova
• familial hypercholesterolemia, Familiální hypercholesterolémie, funkční analýza, functional analysis, confocal microscopy, konfokální mikroskopie, LDLR, LDLR, skládání proteinů, lipoprotein(a), protein folding, lipoprotein(a),

• NLK Publikační typ
• závěrečné zprávy o řešení grantu AZV MZ ČR

Severe combined immunodeficiency (SCID) screening je souhrnný název pro nástroj časné detekce řady závažných vrozených poruch imunity. Současná kvantifikace excizních DNA molekul TREC a KREC umožňuje časně diagnostikovat závažné buněčné i protilátkové vrozené defekty imunity. Do dvouletého pilotního programu screeningu se v letech 2022–2023 v České republice zapojilo > 90 % novorozenců (vyšetřeno bylo 198 675 vzorků). Diagnostikováni byli 2 pacienti se SCID na podkladě CD3 epsilon deficience a atypického kompletního DiGeorgova syndromu a dalších 17 pacientů s jinými vrozenými poruchami imunity, z toho 9 s agamaglobulinemií. U dvou pacientů se SCID umožnil screening časnou kauzální terapii, tj. transplantaci hematopoetických buněk / thymu, u non-SCID pacientů vedla časná znalost jejich diagnózy k zavedení adekvátních režimových a profylaktických opatření za účelem snížení jejich následné morbidity. Od 1. ledna 2024 byl screening závažných vrozených poruch imunity spolu se spinální muskulární atrofií integrován do celoplošného novorozeneckého laboratorního screeningu.

Severe Combined Immunodeficiency (SCID) screening is a collective term for an early detection tool for a range of serious inborn errors of immunity. The quantification of excision DNA molecules TREC and KREC allows for early diagnosis of severe cellular and antibody immune defects. The recently concluded Czech pilot screening program (2022-2023) included over 90% of newborns (with 198,675 samples examined). Two patients with SCID were diagnosed based on CD3 epsilon deficiency and atypical complete DiGeorge syndrome, and another 17 patients were found to have other inborn errors of immunity, including 9 agammaglobulinemia. Screening enabled early causal therapy, i.e., hematopoietic cell/thymus transplantation, for two SCID patients, while early diagnosis in non-SCID patients led to the implementation of appropriate regimen and prophylactic measures to reduce subsequent morbidity. As of January 1, 2024, screening for severe inborn errors of immunity, along with screening for spinal muscular atrophy, becomes integral part of the national laboratory newborn screening program.

• MeSH
• agamaglobulinemie diagnóza   farmakoterapie   genetika   MeSH
• kojenec MeSH
• kombinovaná protilátková terapie terapeutické užití   MeSH
• lidé MeSH
• novorozenecký screening MeSH
• předškolní dítě MeSH
• primární imunodeficience * diagnóza   genetika   terapie   MeSH
• těžká kombinovaná imunodeficience diagnóza   genetika   terapie   MeSH
• thymus abnormality   patologie   MeSH
• transplantace hematopoetických kmenových buněk metody   MeSH
• transplantace orgánů MeSH
• Check Tag
• kojenec MeSH
• lidé MeSH
• mužské pohlaví MeSH
• předškolní dítě MeSH
• Publikační typ
• kazuistiky MeSH

BACKGROUND: Agammaglobulinemia due to variants in IGLL1 has traditionally been considered an exceedingly rare form of severe B-cell deficiency, with only 8 documented cases in the literature. Surprisingly, the first agammaglobulinemic patient identified by newborn screening (NBS) through quantification of kappa-deleting recombination excision circles harbored variants in IGLL1. OBJECTIVE: We comprehensively reviewed clinical and immunologic findings of patients with B-cell deficiency attributed to variants in IGLL1. METHODS: NBS programs reporting the use of kappa-deleting recombination excision circle assays, the European Society for Immunodeficiencies Registry, and authors of published reports featuring patients with B-cell deficiency linked to IGLL1 variants were contacted. Only patients with (likely) pathogenic variants, reduced CD19+ counts, and no alternative diagnosis were included. RESULTS: The study included 13 patients identified through NBS, 2 clinically diagnosed patients, and 2 asymptomatic siblings. All had severely reduced CD19+ B cells (< 0.1 × 109/L) at first evaluation, yet subsequent follow-up assessments indicated residual immunoglobulin production. Specific antibody responses to vaccine antigens varied, with a predominant reduction observed during infancy. Clinical outcomes were favorable with IgG substitution. Two patients successfully discontinued substitution therapy without developing susceptibility to infections and while maintaining immunoglobulin levels. The pooled incidence of homozygous or compound heterozygous pathogenic IGLL1 variants identified by NBS in Austria, Czechia, and Switzerland was 1.3:100,000, almost double of X-linked agammaglobulinemia. CONCLUSION: B-cell deficiency resulting from IGLL1 variants appears to be more prevalent than initially believed. Despite markedly low B-cell counts, the clinical course in some patients may be milder than reported in the literature so far.

• MeSH
• agamaglobulinemie * genetika   imunologie   diagnóza   MeSH
• B-lymfocyty imunologie   MeSH
• dítě MeSH
• fenotyp * MeSH
• kojenec MeSH
• lidé MeSH
• mladiství MeSH
• novorozenec MeSH
• předškolní dítě MeSH
• Check Tag
• dítě MeSH
• kojenec MeSH
• lidé MeSH
• mladiství MeSH
• mužské pohlaví MeSH
• novorozenec MeSH
• předškolní dítě MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH
• přehledy MeSH

• Publikační typ
• abstrakt z konference MeSH

VEXAS syndrom je v roce 2020 nově rozpoznaná a popsaná autoinflamatorní choroba. Akronym VEXAS je složen z prvních písmen V = vakuoly, E = E1 enzymy, X = X-chromozom, A = autoinflamatorní, S = somatické. Podstatou onemocnění je získaná somatická patogenní varianta v genu UBA1. Tento gen kóduje enzym E1, který je zodpovědný za regulaci zánětlivých proteinů vazbou na ubikvitin (ubikvitinizace). Kvůli uložení genu na X chromozomu toto onemocnění postihuje muže, a to v jejich druhé polovině života. Choroba má pestré inflamatorní projevy s hematologickými (hyperkoagulace, anémie, trombocytopenie), dermatologickými (Sweetův snydrom) a revmatologickými (perichondritis, artritis) symptomy. Tyto příznaky lze shrnout do pracovní diagnózy „nespecifikovaná systémová autoinflamatorní choroba“ (undifferentiated systemic autoinflammatory disorder – USAID). Průkaz vakuol při cytologickém hodnocení kostní dřeně je pro tuto chorobu charakteristický a definitivní diagnózu potvrzuje průkaz defektu UBA1 genu. V textu popisujeme našeho prvního pacienta s VEXAS syndromem a uvádíme stručný přehled literatury.

The VEXAS syndrome is a recently identified autoinflammatory systemic disease. The acronym VEXAS stands for Vacuoles, E1 enzyme, X linked, Autoinflammatory, Somatic. The disease is due to an acquired somatic mutation of the UBA1 gene, which encodes for the E 1 enzyme, which in turn is responsible for the ubiquitination of proteins. Due to its location on the X chromosome, the disease predominantly affects men in the second half of life. The patients present with a plenty of inflammatory clinical symptoms, often with overlap of hematologic (anemia, thrombocytopenia hypercoagulation), dermatologic (Sweet syndrom), and rheumatologic (artritis, perichondritis) symptoms. These symptoms can be assessed as “undifferentiated systemic autoinflammatory disorder (USAID) ”. Bone marrow smear with the presence of cytoplasmic vacuoles in the bone marrow is characteristic and the mutation of UBA1 gene is proof of this diagnosis. In this article, we report our first clinical case of a VEXAS syndrome and give an overview of the literature, including pathophysiology, clinical symptoms and diagnostics of the disease.

• Klíčová slova
• syndrom VEXAS,
• MeSH
• diferenciální diagnóza MeSH
• genetické nemoci vázané na chromozom X * diagnóza   farmakoterapie   genetika   klasifikace   MeSH
• kožní manifestace MeSH
• lidé MeSH
• myelodysplastické syndromy diagnóza   klasifikace   MeSH
• příznaky a symptomy MeSH
• senioři MeSH
• Sweetův syndrom diagnóza   etiologie   MeSH
• vakuoly patologie   MeSH
• Check Tag
• lidé MeSH
• mužské pohlaví MeSH
• senioři MeSH
• Publikační typ
• kazuistiky MeSH

Výbor České společnosti pro aterosklerózu (ČSAT) přináší ve výběru nejdůležitější informace z článku F. Kronenberga et al (Atherosclerosis 2023; 374), kterým autoři reagovali na otázky kladené odbornou veřejností ke Konsenzu EAS o lipoproteinu(a) vydaného roku 2022 (Eur Heart J 2022; 43). Autoři zformulovali 30 nejčastěji kladených otázek, na něž stručně odpověděli a připojili k odpovědím vysvětlující komentář. Výbor ČSAT z těchto komentářů vybral nejdůležitější informace relevantní pro české prostředí.

The Committee of the Czech Society for Atherosclerosis (CSAT) has selected the most important information from the article by F. Kronenberg et al (Atherosclerosis 2023; 374), by which the authors responded to questions posed by the professional community on the EAS Consensus on lipoprotein(a) published in 2022 (Eur Heart J 2022; 43). The authors formulated the 30 most frequently asked questions, answered them briefly, and added explanatory commentary to the answers. From these comments, the CSAT Committee selected the most relevant information for the Czech environment.

• MeSH
• ateroskleróza * patologie   prevence a kontrola   MeSH
• kardiovaskulární nemoci patologie   prevence a kontrola   MeSH
• lidé MeSH
• lipoprotein (a) * analýza   genetika   účinky léků   MeSH
• rizikové faktory kardiovaskulárních chorob MeSH
• směrnice pro lékařskou praxi jako téma MeSH
• Check Tag
• lidé MeSH
• Publikační typ
• práce podpořená grantem MeSH