Publications by authors named "Rygiel A"

Recently, the knowledge of the genetic basis of fertility disorders has expanded enormously, mainly thanks to the use of next-generation sequencing (NGS). However, the genetic cause of infertility, in the majority of patients, is still undefined. The aim was to identify novel and recurrent pathogenic/likely pathogenic variants in patients with isolated infertility or puberty delay using a targeted NGS technique.

View Article and Find Full Text PDF

The CEL-HYB1 hybrid allele of the carboxyl ester lipase (CEL) gene and its pseudogene (CELP) has been associated with chronic pancreatitis (CP). Recent work indicated that amino acid positions 488 and 548 in CEL-HYB1 determined pathogenicity. Haplotype Thr488-Ile548 was associated with CP while haplotypes Thr488-Thr548 and Ile488-Thr548 were benign.

View Article and Find Full Text PDF

Background: The Mendelian Disorders of Cornification (MeDOC) comprise a large number of disorders that present with either localised (palmoplantar keratoderma, PPK) or generalised (ichthyoses) signs. The MeDOC are highly heterogenic in terms of genetics and phenotype. Consequently, diagnostic process is challenging and before implementation of the next generation sequencing, was mostly symptomatic, not causal, which limited research on those diseases.

View Article and Find Full Text PDF

Objectives: The objective of the study was to describe phenotype-genotype correlation in selected cases with infertility and emphasise the importance of genetic testing as useful tool for proper treatment decision making MATERIAL AND METHODS: Genetic tests were performed in four patients as a part of diagnostic procedure by Sanger sequencing or targeted next generation sequencing (NGS gene panel).

Results: We found the genetic causes of hypogonadotropic hypogonadism in 3 males and female with infertility.

Conclusions: Genetic testing is carried out when searching for the genetic causes of clinically identified disorders.

View Article and Find Full Text PDF

Coenzyme Q5 (COQ5), a C-methyltransferase, modifies coenzyme Q10 (COQ10) during biosynthesis and interacts with polyA-tail regulating zinc-finger protein ZC3H14 in neural development. Here, we present a fifth patient (a third family) worldwide with neurodevelopmental and physiological symptoms including COQ10 deficiency. Our patient harbors one novel c.

View Article and Find Full Text PDF
Article Synopsis
  • AADC deficiency is a rare genetic disorder that impacts the production of neurotransmitters like dopamine, norepinephrine, epinephrine, and serotonin, diagnosed via CSF/plasma analysis, AADC activity measurement, and genetic testing for the DDC gene.
  • In a study involving 348 patients, researchers identified 26 new DDC variants and analyzed their prevalence, finding that a specific splice variant, c.714+4A>T, was the most common, particularly prevalent in Taiwan and China.
  • The majority of identified genotypes were classified as pathogenic or likely pathogenic, with only one benign variant reported, and most AADC protein variants impacted protein function significantly based on their structural characteristics.*
View Article and Find Full Text PDF
Article Synopsis
  • * This study reports on two variants found in affected families, including a novel pathogenic variant (c.639_642dup) and a rare variant (c.10C > T) of uncertain significance.
  • * Transcriptome analysis reveals that genes related to skin development are upregulated in LK lesions, while those involved in various essential functions are downregulated, providing insights into the disease's pathogenesis and potential implications for treatment and genetic counseling.
View Article and Find Full Text PDF

People experiencing homelessness are at increased risk for HIV, and people with HIV (PWH) experiencing homelessness are more likely to experience suboptimal HIV health outcomes than PWH with stable housing. Within Alabama, a state prioritized in the Ending the HIV Epidemic initiative, Jefferson County consistently has the highest number of new HIV diagnoses as well as a high percentage of the state's homeless population. To address the twin epidemics of both HIV and homelessness within the high-priority setting of Jefferson County, Alabama, this 1-year community-based project, Ending the HIV Epidemic: Addressing HIV Health and Homelessness (AH3), sought to increase HIV testing and linkage to care among this population by placing a full-time case manager trained in HIV testing and case management at a homeless shelter.

View Article and Find Full Text PDF

Background: Genetic alterations in digestive enzymes have been associated with chronic pancreatitis (CP). Recently, chymotrypsin like elastase 3B (CELA3B) emerged as a novel risk gene. Thus, we evaluated CELA3B in two European cohorts with CP.

View Article and Find Full Text PDF

The digestive protease chymotrypsin C (CTRC) protects the pancreas against pancreatitis by degrading potentially harmful trypsinogen. Loss-of-function genetic variants in CTRC increase risk for chronic pancreatitis (CP) with variable effect size, as judged by the reported odds ratio (OR) values. Here, we performed a meta-analysis of published studies on four variants that alter the CTRC amino-acid sequence, are clinically relatively common (global carrier frequency in CP >1%), reproducibly showed association with CP and their loss of function phenotype was verified experimentally.

View Article and Find Full Text PDF
Article Synopsis
  • AADC deficiency is a rare and severe genetic disorder that leads to serious health issues in early childhood due to a mutation affecting dopamine and serotonin synthesis.
  • Whole exome sequencing identified a specific mutation (c.989C > T) in AADC that disrupts the enzyme's ability to catalyze reactions efficiently without changing its overall structure.
  • The research highlights that the mutation causes a significant drop in catalytic efficiency, suggesting that targeted therapies could be developed based on understanding this molecular mechanism.
View Article and Find Full Text PDF
Article Synopsis
  • - The study investigates the genetic factors of non-alcoholic chronic pancreatitis (NACP), focusing on the CUZD1 gene, which is highly expressed in pancreatic cells and may contribute to the disease's risk.
  • - Researchers analyzed genetic data from thousands of patients and controls in Europe and Japan, finding several non-synonymous variants associated with NACP, especially in the European cohort.
  • - The findings suggest CUZD1 could be a new susceptibility gene for NACP, but further research is needed to understand how these genetic variants lead to the development of pancreatitis.
View Article and Find Full Text PDF

Background: Large and giant congenital melanocytic nevi (CMN), benign naevomelanocytic proliferations derived from neural crests, with a projected adult size (PAS) ≥ 20 cm, are connected to a high risk of melanoma and neurocutaneous melanosis. Among several factors, genetic alterations seem to be involved in tumorigenesis. The aim of the present study was to analyse the mutation status of and genes in resection specimens from large or giant CMN in a group of Polish patients.

View Article and Find Full Text PDF
Article Synopsis
  • Recent studies link loss of function variants of the TRPV6 gene to chronic pancreatitis (CP) in various populations, prompting a new investigation in European cohorts.
  • The research involved 152 pediatric CP patients from Poland and 157 non-alcoholic young CP patients from Germany, where the TRPV6 gene was analyzed through advanced sequencing techniques.
  • Results revealed 10 new TRPV6 variants in CP patients, specifically identifying certain variants that are significantly more common in Polish and German patients, confirming TRPV6 as a potential susceptibility gene for early-onset chronic pancreatitis.
View Article and Find Full Text PDF

Chronic pancreatitis (CP) is a progressive, irreversible inflammatory disorder of the pancreas, which results from interrelations between different genetic and environmental factors. Genetic variants are the primary cause of the disease in early-onset nonalcoholic CP patients. Novel CP-associated genes are continuously emerging from genetic studies on CP cohorts, providing important clues for distinct mechanisms involved in CP development.

View Article and Find Full Text PDF

Classic galactosemia (OMIM #230400) is an autosomal recessive disorder caused by homozygous or compound heterozygous pathogenic variants in the galactose-1-phosphate uridylyltransferase gene (GALT; 606999) on chromosome 9p13. Its diagnosis is established by detecting elevated erythrocyte galactose-1-phosphate concentration, reduced erythrocyte galactose-1-phosphate uridylyltransferase (GALT) enzyme activity. Biallelic pathogenic variants in the GALT gene is confirmed by DNA analysis.

View Article and Find Full Text PDF

Purpose: The TAPUR Study is a phase II basket trial that aims to identify signals of antitumor activity of commercially available targeted agents in patients with advanced cancers harboring genomic alterations known to be drug targets. Results in a cohort of patients with metastatic breast cancer (mBC) with high tumor mutational burden (HTMB) treated with pembrolizumab are reported.

Methods: Patients with advanced mBC received standard doses of either 2 mg/kg or 200 mg infusions of pembrolizumab every 3 weeks.

View Article and Find Full Text PDF
Article Synopsis
  • The TAPUR Study is a phase II trial assessing the effectiveness of the drug palbociclib in patients with advanced non-small-cell lung cancer (NSCLC) who have specific genomic alterations known to respond to targeted therapies.
  • Out of 29 enrolled patients, the study found a 31% disease control rate, with some experiencing a partial response or stable disease, and median progression-free survival of 8.1 weeks and median overall survival of 21.6 weeks.
  • Although palbociclib showed modest antitumor activity, further research is needed to validate its efficacy and usefulness for this patient population.
View Article and Find Full Text PDF

Background: The Targeted Agent and Profiling Utilization Registry (TAPUR) Study, a phase II basket study, evaluates anti-tumor activity of commercially available targeted agents in patients with advanced cancers harboring genomic alterations known as drug targets.

Objective: With no known genomic targets predictive of sensitivity to cetuximab, cetuximab was evaluated in patients with breast cancer (BC), non-small cell lung cancer (NSCLC), and ovarian cancer (OC), without KRAS, NRAS, or BRAF mutations.

Patients And Methods: Eligible patients with advanced BC, NSCLC, and OC received a cetuximab loading dose, then weekly infusions (250 mg/m over 60 min).

View Article and Find Full Text PDF

Background: TAPUR is a pragmatic, phase II basket study evaluating the antitumor activity of commercially available targeted agents in patients with advanced cancers harboring genomic alterations known to be drug targets. Sunitinib is an oral multikinase inhibitor of FMS-like tyrosine kinase-3 (FLT-3), among other targets. Results from a cohort of patients with metastatic colorectal cancer (mCRC) with FLT-3 amplification treated with sunitinib are reported.

View Article and Find Full Text PDF

Chronic pancreatitis (CP) is a rare disease in children. We describe the first case of a 3-year-old Caucasian patient with CP with the presence of a homozygous pathogenic variant c.194 + 2T > C in ( ) and pancreas divisum.

View Article and Find Full Text PDF

Barrett's esophagus (BE) is a metaplastic condition of the distal esophagus, resulting from longstanding gastroesophageal reflux disease (GERD). BE predisposes for the highly malignant esophageal adenocarcinoma (EAC). Both BE and EAC have the highest frequencies in white males.

View Article and Find Full Text PDF

Hailey-Hailey disease (HHD) is a rare, late-onset autosomal dominant genodermatosis characterized by blisters, vesicular lesions, crusted erosions, and erythematous scaly plaques predominantly in intertriginous regions. HHD is caused by ATP2C1 mutations. About 180 distinct mutations have been identified so far; however, data of only few cases from Central Europe are available.

View Article and Find Full Text PDF

Purpose: The Targeted Agent and Profiling Utilization Registry (TAPUR) Study identifies signals of antitumor activity of commercially available targeted agents in patients with advanced cancers that harbor genomic alterations known as drug targets. In this article, data from two cohorts of patients with pancreatic and biliary cancers with loss or mutation treated with palbociclib are reported.

Methods: Eligible patients age 12 years and older with advanced measurable or evaluable solid tumors are provided treatment according to protocol-specified genomic matching rules.

View Article and Find Full Text PDF