Orphan or Rare Diseases

Multi-disciplinary Insights from the First European Forum on Visceral Myopathy 2022 Meeting

Thu, 2023-08-31 06:00

Dig Dis Sci. 2023 Oct;68(10):3857-3871. doi: 10.1007/s10620-023-08066-1. Epub 2023 Aug 31.

ABSTRACT

Visceral myopathy is a rare, life-threatening disease linked to identified genetic mutations in 60% of cases. Mostly due to the dearth of knowledge regarding its pathogenesis, effective treatments are lacking. The disease is most commonly diagnosed in children with recurrent or persistent disabling episodes of functional intestinal obstruction, which can be life threatening, often requiring long-term parenteral or specialized enteral nutritional support. Although these interventions are undisputedly life-saving as they allow affected individuals to avoid malnutrition and related complications, they also seriously compromise their quality of life and can carry the risk of sepsis and thrombosis. Animal models for visceral myopathy, which could be crucial for advancing the scientific knowledge of this condition, are scarce. Clearly, a collaborative network is needed to develop research plans to clarify genotype-phenotype correlations and unravel molecular mechanisms to provide targeted therapeutic strategies. This paper represents a summary report of the first 'European Forum on Visceral Myopathy'. This forum was attended by an international interdisciplinary working group that met to better understand visceral myopathy and foster interaction among scientists actively involved in the field and clinicians who specialize in care of people with visceral myopathy.

PMID:37650948 | PMC:PMC10517037 | DOI:10.1007/s10620-023-08066-1

Categories: Literature Watch

Initiatives to promote access to medicines after publication of the Brazilian Policy on the Comprehensive Care of People with Rare Diseases

Thu, 2023-08-31 06:00

Orphanet J Rare Dis. 2023 Aug 31;18(1):259. doi: 10.1186/s13023-023-02881-5.

ABSTRACT

BACKGROUND: Rare diseases affect a small number of people compared to prevalent diseases. The vast majority of these diseases are of genetic origin, have no cure, are chronic and can lead to death. Although the right to access medicines is included in the constitutionally guaranteed right to health in Brazil, problems in the supply of medicines for rare diseases are reported in the country. This study aimed to describe and analyse the initiatives to promote access to medicines for treating rare diseases in the Unified Health System, Brazil, after the publication of the Brazilian Policy on the Comprehensive Care of People with Rare Diseases. Based on the model published by the WHO Regional Office for Europe, which described access to medicines in prelaunch, perilaunch and postlaunch policies, the initiatives referring to each category were summarized based on documentary research searched in online databases from January 2014 to December 2020.

RESULTS: Different actions and policy interventions were identified, which went through the expansion of resources for research and development, health regulations, incorporation of new drugs, review and publication of clinical guidelines, and expansion of the network of care facilities by the Ministry of Health. On the other hand, aspects related to care policies, pricing methods, technological development, and development of pharmaceutical service processes were not implemented.

CONCLUSIONS: Although it is impossible to determine the explicit motivation of such actions concerning the Policy, its publication certainly was a landmark in Brazilian society, allowing greater recognition of the needs of rare disease patients and the specificities of treatment'. However, this study suggests that the steps that make up the life cycle of medicines are not linked, lacking articulation and integration of the care network, and consequently, there is no evidence that rare disease policy publication has generated a broad impact on the promotion of access to medicines to treat rare diseases in Brazil.

PMID:37653461 | PMC:PMC10472611 | DOI:10.1186/s13023-023-02881-5

Categories: Literature Watch

Successful experience of tofacitinib treatment in patients with Fibrodysplasia Ossificans Progressiva

Tue, 2023-08-29 06:00

Pediatr Rheumatol Online J. 2023 Aug 29;21(1):92. doi: 10.1186/s12969-023-00856-1.

ABSTRACT

Fibrodysplasia ossificans progressive (FOP) is an ultra-rare genetic disorder that is caused by a mutation in the ACVR1 gene and provokes severe heterotopic ossification. Since flares of the disease are associated with inflammation, it is assumed that JAK inhibitors can control active FOP due to blocking multiple signaling pathways.

PMID:37644581 | PMC:PMC10464034 | DOI:10.1186/s12969-023-00856-1

Categories: Literature Watch

Overcoming challenges in rare disease registry integration using the semantic web - a clinical research perspective

Tue, 2023-08-29 06:00

Orphanet J Rare Dis. 2023 Aug 29;18(1):253. doi: 10.1186/s13023-023-02841-z.

ABSTRACT

The growing number of disease-specific patient registries for rare diseases has highlighted the need for registry interoperability and data linkage, leading to large-scale rare disease data integration projects using Semantic Web based solutions. These technologies may be difficult to grasp for rare disease experts, leading to limited involvement by domain expertise in the data integration process. Here, we propose a data integration framework starting from the perspective of the clinical researcher, allowing for purposeful rare disease registry integration driven by clinical research questions.

PMID:37644439 | DOI:10.1186/s13023-023-02841-z

Categories: Literature Watch

Primary lateral sclerosis plus parkinsonism: a case report

Tue, 2023-08-29 06:00

BMC Neurol. 2023 Aug 29;23(1):312. doi: 10.1186/s12883-023-03360-x.

ABSTRACT

BACKGROUND: The standard of diagnosing primary lateral sclerosis, the Pringle criteria, requires three years of purely upper motor neuron symptom presentation before confirming diagnosis. This classic standard has been questioned on occasion due to its restrictive range of both time period and symptomatic exhibition.

CASE PRESENTATION: This case report will review a 57-year-old Caucasian female who presented with pyramidal and extrapyramidal features suggestive of the exceedingly rare disease primary lateral sclerosis plus parkinsonism. We will describe the mixture of upper motor neuron signs and striking parkinsonian symptoms experienced by the patient, as well as the full diagnostic workup leading to her preliminary diagnosis. The details of this case will then be utilized to explore the diagnostic criteria of primary lateral sclerosis, as well as to work through the differential of conditions resembling Parkinson's disease.

CONCLUSIONS: The current criteria to diagnose primary lateral sclerosis may be excluding patients with the disease and is an ongoing area of investigation. A thorough differential including other neurodegenerative conditions is necessary to consider and requires long-term follow-up.

PMID:37644413 | DOI:10.1186/s12883-023-03360-x

Categories: Literature Watch

Can esophageal symptoms be associated with sleep disorders in esophageal rare diseases?. A prospective case-control study across achalasia, eosinophilic esophagitis and gastroesophageal reflux disease

Tue, 2023-08-29 06:00

Minerva Gastroenterol (Torino). 2023 Sep;69(3):365-373. doi: 10.23736/S2724-5985.21.03002-3.

ABSTRACT

BACKGROUND: The association between sleep disorders and gastroesophageal reflux disease (GERD) has been the subject of several studies; however, quality of sleep has been under investigated in adult patients with eosinophilic esophagitis (EoE) and achalasia (Ach). This study aims to evaluate the prevalence of sleep disturbances in patients with EoE and Ach compared to GERD patients and their associations with esophageal symptoms.

METHODS: Thirty Ach patients and 20 EoE patients were consecutively enrolled and compared to a control group of 46 GERD patients. All patients underwent a standardized questionnaire investigating the intensity-frequency scores (from 0 to 6) of esophageal symptoms, Pittsburgh Sleep Quality Index (PSQI) questionnaire to assess sleep quality, a SF-36 survey to investigate health-related quality of life (both physical (PCS) and mental (MCS) component scales), Beck Depression Inventory-II (BDI-II) and State Trait Anxiety Inventory (STAI) to assess the presence of depression and anxiety.

RESULTS: The prevalence of sleep disturbances was 66.7% in Ach, 50% in EoE, and 60% in GERD patients (P=0.5). PCS and MCS significantly correlated with depression and anxiety levels. Ach patients showed significantly higher intensity-frequency scores of dysphagia for solids (Scheffè P<0.001) and liquids (Scheffè P<0.001) than EoE and GERD patients. No differences were found in the intensity-frequency scores of the esophageal symptoms among the three groups. There was a significant association between worst quality of sleep and higher intensity-frequency scores of regurgitation.

CONCLUSIONS: Sleep disturbances are common with Ach and EoE, similar to GERD patients. Moreover, there is a significant association between regurgitation, a typical GERD symptom, and poor quality of sleep, independent from diagnosis.

PMID:37642600 | DOI:10.23736/S2724-5985.21.03002-3

Categories: Literature Watch

Author Correction: The landscape of somatic mutation in cerebral cortex of autistic and neurotypical individuals revealed by ultra-deep whole-genome sequencing

Tue, 2023-08-29 06:00

Nat Neurosci. 2023 Aug 29. doi: 10.1038/s41593-023-01437-x. Online ahead of print.

NO ABSTRACT

PMID:37644260 | DOI:10.1038/s41593-023-01437-x

Categories: Literature Watch

Insight into the Binding of First- and Second-Generation PET Tracers to 4R and 3R/4R Tau Protofibrils

Mon, 2023-08-28 06:00

ACS Chem Neurosci. 2023 Sep 20;14(18):3528-3539. doi: 10.1021/acschemneuro.3c00437. Epub 2023 Aug 28.

ABSTRACT

Primary supranuclear palsy (PSP) is a rare neurodegenerative disease that perturbs body movement, eye movement, and walking balance. Similar to Alzheimer's disease (AD), the abnormal aggregation of tau fibrils in the central neuronal and glial cells is a major hallmark of PSP disease. In this study, we use multiple approaches, including docking, molecular dynamics, and metadynamics simulations, to investigate the binding mechanism of 10 first- and second-generations of PET tracers for PSP tau and compare their binding in cortical basal degeneration (CBD) and AD tauopathies. Structure-activity relationships, binding preferences, the nature of ligand binding in terms of basic intermolecular interactions, the role of polar/charged residues, induced-fit mechanisms, grove closures, and folding patterns for the binding of these tracers in PSP, CBD, and AD tau fibrils are evaluated and discussed in detail in order to build a holistic picture of what is essential for the binding and also to rank the potency of the different tracers. For example, we found that the same tracer shows different binding preferences for the surface sites of tau fibrils that are intrinsically distinct in the folding patterns. Results from the metadynamics simulations predict that PMPBB3 and PBB3 exhibit the strongest binding free energies onto the Q276[I277]I278, Q351[S352]K353, and N368[K369]K370 sites of PSP than the other explored tracers, indicating a solid preference for vdW and cation-π interactions. Our results also reproduced known preferences of tracers, namely, that MK6240 binds better to AD tau than CBD tau and PSP tau and that CBD2115, PI2620, and PMPBB3 are 4R tau binders. These findings fill in the well-sought-after knowledge gap in terms of these tracers' potential binding mechanisms and will be important for the design of highly selective novel PET tracers for tauopathies.

PMID:37639522 | DOI:10.1021/acschemneuro.3c00437

Categories: Literature Watch

Immune responses and safety of COVID-19 vaccination in atypical hemolytic uremic syndrome patients in Taiwan

Sun, 2023-08-27 06:00

Vaccine. 2023 Sep 22;41(41):5940-5945. doi: 10.1016/j.vaccine.2023.08.020. Epub 2023 Aug 25.

ABSTRACT

Atypical hemolytic uremic syndrome is a rare, life-threatening disorder which can be triggered by COVID 19 infection and COVID 19 vaccination then induce multiple organ failure. Our study is the first to evaluate immune responses to COVID-19 vaccination and safety in a cohort of patients in a local single-center study in Taiwan.. Results indicate that vaccines effectively shield aHUS patients from severe COVID-19 complications without significant safety concerns. A double booster dose for the third vaccine is essential for optimal efficacy. Anti-complement therapy did not influence vaccination effectiveness. Transplant aHUS patients had the lowest immune response titers, indicating a need for additional vaccine doses. Compared to healthcare workers, aHUS patients had poor T-cell responses. We noted a superior trend with mixed-type COVID-19 vaccinations in aHUS patients, while fixed-type mRNA demonstrated better results in healthcare workers. Our findings endorse COVID-19 vaccination as a potent strategy to safeguard aHUS patients from severe complications, emphasizing the importance of vigilant monitoring pre- and post-vaccination.

PMID:37635000 | DOI:10.1016/j.vaccine.2023.08.020

Categories: Literature Watch

Congenital aniridia patients' experience on their visual impairment in Hungary.

Sun, 2023-08-27 06:00

Orv Hetil. 2023 Aug 27;164(34):1342-1349. doi: 10.1556/650.2023.32845. Print 2023 Aug 27.

ABSTRACT

INTRODUCTION: Aniridia is a rare congenital panocular disease associated with varying degrees of visual acuity impairment.

OBJECTIVE: To assess the experiences of congenital aniridia patients in Hungary, with visual impairment using a questionnaire developed by the ANIRIDIA-NET.

PATIENTS AND METHOD: Patients completed the Hungarian version of the 20-item ANIRIDIA-NET questionnaire with our assistance. The questionnaire covered demographic data, the most common complaints caused by the disease, the difficulties caused by low vision in different life situations and the frequency of low vision aids used in daily life.

RESULTS: 33 subjects (17 female [51.51%] and 16 male [48.48%]), 16 (48.5%) children and 17 (51.5%) adults completed the questionnaire, with an age of 25.69 ± 17.49 years (5-59 years). Daily photosensitivity was reported by 27 (81.8%), dry eyes by 5 (15.2%), tearing by 4 (12.1%), fluctuating vision by 3 (9.1%), and eye pain by 2 (6.1%) subjects. The majority of respondents said that personal communication with schoolmates (16 [48.5%]) or colleagues at work (11 [33.3%]) never caused difficulties because of their visual impairment. 29 people (87.9%) never needed help with daily routines at home, 24 (72.7%) with getting to school/work and 17 (51.5%) with various activities. 29 people (87.8%) never used low vision aids for communication, 23 (69.7%) for travelling, 20 (60.6%) for participating in social activities, 18 (54.5%) for studying/work.

CONCLUSION: Although aniridia is associated with reduced visual acuity, the majority of people with congenital aniridia, especially in childhood, manage to cope with personal communication and various life situations without difficulty, despite their eye complaints. Low vision aids can be an important aid for them as they grow into adulthood and as they age. Orv Hetil. 2023; 164(34): 1342-1349.

PMID:37634154 | DOI:10.1556/650.2023.32845

Categories: Literature Watch

Type I Dentin Dysplasia: The Literature Review and Case Report of a Family Affected by Misrecognition and Late Diagnosis

Sat, 2023-08-26 06:00

Medicina (Kaunas). 2023 Aug 17;59(8):1477. doi: 10.3390/medicina59081477.

ABSTRACT

Background and Objectives: Type I dentin dysplasia (DD-I) is a rare genetic disorder with autosomal dominant or recessive inheritance at risk of late or long-misunderstood diagnosis because the teeth, compared to other degenerative dentin diseases, do not have coronal defects and/or alterations but only at the root level (absent, conical, pointed roots, and obliterated pulp canals). The first radiographic suspicion often occurs only in case of sudden mobility and/or abscesses of the permanent teeth. Genetic tests confirm the diagnosis. Case Presentation: This case report describes the oral and radiographic characteristics of two siblings, 12 and 10 years old, a male and a female, at an early age affected by DD-I, whose diagnosis was made for a first orthodontic visit. The father and the older child had already undergone dental and orthodontic treatments, respectively, without the disease being suspected by the dentist. Results: Genetic tests support the diagnosis of DD-I. Following the diagnosis, the patients began a process of close periodic checks every 3-4 months to monitor their situation. The male child lost upper lateral incisors, which were then replaced with a light nylon removable prosthesis. Conclusions: The ability to recognize the radiographic features characteristic of DD-I is very important to avoid prejudicial diagnostic delays and to be able to plan the long-term treatment of these patients better, especially when the pathology was primarily misrecognized in the family.

PMID:37629767 | PMC:PMC10456812 | DOI:10.3390/medicina59081477

Categories: Literature Watch

Lipidomic Approaches in Common and Rare Cerebrovascular Diseases: The Discovery of Unconventional Lipids as Novel Biomarkers

Sat, 2023-08-26 06:00

Int J Mol Sci. 2023 Aug 13;24(16):12744. doi: 10.3390/ijms241612744.

ABSTRACT

Stroke remains a major cause of death and disability worldwide. Identifying new circulating biomarkers able to distinguish and monitor common and rare cerebrovascular diseases that lead to stroke is of great importance. Biomarkers provide complementary information that may improve diagnosis, prognosis and prediction of progression as well. Furthermore, biomarkers can contribute to filling the gap in knowledge concerning the underlying disease mechanisms by pointing out novel potential therapeutic targets for personalized medicine. If many "conventional" lipid biomarkers are already known to exert a relevant role in cerebrovascular diseases, the aim of our study is to review novel "unconventional" lipid biomarkers that have been recently identified in common and rare cerebrovascular disorders using novel, cutting-edge lipidomic approaches.

PMID:37628924 | PMC:PMC10454673 | DOI:10.3390/ijms241612744

Categories: Literature Watch

Diverse Clinical Phenotypes of <em>CASK</em>-Related Disorders and Multiple Functional Domains of CASK Protein

Sat, 2023-08-26 06:00

Genes (Basel). 2023 Aug 20;14(8):1656. doi: 10.3390/genes14081656.

ABSTRACT

CASK-related disorders are a form of rare X-linked neurological diseases and most of the patients are females. They are characterized by several symptoms, including microcephaly with pontine and cerebellar hypoplasia (MICPCH), epilepsy, congenital nystagmus, and neurodevelopmental disorders. Whole-genome sequencing has identified various mutations, including nonsense and missense mutations, from patients with CASK-related disorders, revealing correlations between specific mutations and clinical phenotypes. Notably, missense mutations associated with epilepsy and intellectual disability were found throughout the whole region of the CASK protein, while missense mutations related to microcephaly and MICPCH were restricted in certain domains. To investigate the pathophysiology of CASK-related disorders, research groups have employed diverse methods, including the generation of CASK knockout mice and the supplementation of CASK to rescue the phenotypes. These approaches have yielded valuable insights into the identification of functional domains of the CASK protein associated with a specific phenotype. Additionally, recent advancements in the AI-based prediction of protein structure, such as AlphaFold2, and the application of genome-editing techniques to generate CASK mutant mice carrying missense mutations from patients with CASK-related disorders, allow us to understand the pathophysiology of CASK-related disorders in more depth and to develop novel therapeutic methods for the fundamental treatment of CASK-related disorders.

PMID:37628707 | PMC:PMC10454856 | DOI:10.3390/genes14081656

Categories: Literature Watch

BA.1/BA.5 Immunogenicity, Reactogenicity, and Disease Activity after COVID-19 Vaccination in Patients with ANCA-Associated Vasculitis: A Prospective Observational Cohort Study

Sat, 2023-08-26 06:00

Viruses. 2023 Aug 21;15(8):1778. doi: 10.3390/v15081778.

ABSTRACT

Emerging omicron subtypes with immune escape lead to inadequate vaccine response with breakthrough infections in immunocompromised individuals such as Anti-neutrophil Cytoplasmic Antibody (ANCA)-associated vasculitis (AAV) patients. As AAV is considered an orphan disease, there are still limited data on SARS-CoV-2 vaccination and prospective studies that have focused exclusively on AAV patients are lacking. In addition, there are safety concerns regarding the use of highly immunogenic mRNA vaccines in autoimmune diseases, and further studies investigating reactogenicity are urgently needed. In this prospective observational cohort study, we performed a detailed characterization of neutralizing antibody responses against omicron subtypes and provided a longitudinal assessment of vaccine reactogenicity and AAV disease activity. Different vaccine doses were generally well tolerated and no AAV relapses occurred during follow-up. AAV patients had significantly lower anti-S1 IgG and surrogate-neutralizing antibodies after first, second, and third vaccine doses as compared to healthy controls, respectively. Live-virus neutralization assays against omicron subtypes BA.1 and BA.5 revealed that previous SARS-CoV-2 vaccines result in an inadequate neutralizing immune response in immunocompromised AAV patients. These data demonstrate that new vaccination strategies including adapted mRNA vaccines against epitopes of emerging variants are needed to help protect highly vulnerable individuals such as AAV patients.

PMID:37632120 | DOI:10.3390/v15081778

Categories: Literature Watch

Clinical Characterization of Pediatric Erythromelalgia: A Single-Center Case Series

Sat, 2023-08-26 06:00

Children (Basel). 2023 Jul 26;10(8):1282. doi: 10.3390/children10081282.

ABSTRACT

Erythromelalgia is a descriptive term for severe burning pain and erythema in the distal extremities relieved by cold and exacerbated by heat. Pediatric case series to date are relatively small. We extracted and analyzed medical record data for 42 pediatric patients to describe clinical characteristics, associated conditions, and responses to treatments. Informed consent was obtained according to an IRB-approved protocol that included gene discovery. Three patients had confirmed Nav1.7 sodium channelopathies, with six additional patients under investigation with novel gene candidates. There was a female predominance (2.5:1), and the median onset age was 12 years (IQR = 3-14). Patients saw a median of three specialists (IQR = 2-3) for a diagnosis. The majority (90%) reported bilateral symptoms. Cooling methods usually provided partial relief, while heat and exercise exacerbated pain. No medication appeared to be consistently effective; commonly prescribed medications included sodium channel blockers (n = 37), topical analgesics (n = 26), gabapentin (n = 22), and aspirin (n = 15). Based on the currently published literature, we believe this cohort is the largest pediatric study of erythromelalgia to date. Many findings are consistent with those of previously published case series. Work is in progress to establish a prospective cohort and multi-center registry.

PMID:37628281 | DOI:10.3390/children10081282

Categories: Literature Watch

Realizing the Potential of Gene Therapies for Rare and Ultra-Rare Inherited Diseases

Fri, 2023-08-25 06:00

Hum Gene Ther. 2023 Sep;34(17-18):776-781. doi: 10.1089/hum.2023.127.

ABSTRACT

Rare and ultrarare diseases have been central to the field of gene therapy since its earliest stage, and we are now witnessing more and more effective treatments entering the clinical realm for patients in need. However, despite promising results across a range of rare diseases, transformative gene therapies may not be available and accessible to patients for nonmedical reasons. Traditional regulatory and commercialization pathways to licensed products seem to be prohibitive for ultrasmall patient populations. Here, we highlight some of the challenges of delivering gene therapies in rare diseases and discuss innovative solutions being proposed by the gene therapy community.

PMID:37624746 | DOI:10.1089/hum.2023.127

Categories: Literature Watch

Toward representative genomic research: the children's rare disease cohorts experience

Fri, 2023-08-25 06:00

Ther Adv Rare Dis. 2023 Aug 22;4:26330040231181406. doi: 10.1177/26330040231181406. eCollection 2023 Jan-Dec.

ABSTRACT

BACKGROUND: Due to racial, cultural, and linguistic marginalization, some populations experience disproportionate barriers to genetic testing in both clinical and research settings. It is difficult to track such disparities due to non-inclusive self-reported race and ethnicity categories within the electronic health record (EHR). Inclusion and access for all populations is critical to achieve health equity and to capture the full spectrum of rare genetic disease.

OBJECTIVE: We aimed to create revised race and ethnicity categories. Additionally, we identified racial and ethnic under-representation amongst three cohorts: (1) the general Boston Children's Hospital patient population (general BCH), (2) the BCH patient population that underwent clinical genomic testing (clinical sequencing), and (3) Children's Rare Disease Cohort (CRDC) research initiative participants.

DESIGN AND METHODS: Race and ethnicity data were collected from the EHRs of the general BCH, clinical sequencing, and CRDC cohorts. We constructed a single comprehensive set of race and ethnicity categories. EHR-based race and ethnicity variables were mapped within each cohort to the revised categories. Then, the numbers of patients within each revised race and ethnicity category were compared across cohorts.

RESULTS: There was a significantly lower percentage of Black or African American/African, non-Hispanic/non-Latine individuals in the CRDC cohort compared with the general BCH cohort, but there was no statistically significant difference between the CRDC and the clinical sequencing cohorts. There was a significantly lower percentage of multi-racial, Hispanic/Latine individuals in the CRDC cohort than the clinical sequencing cohort. White, non-Hispanic/non-Latine individuals were over-represented in the CRDC compared to the two other groups.

CONCLUSION: We highlight underrepresentation of certain racial and ethnic populations in sequencing cohorts compared to the general hospital population. We propose a range of measures to address these disparities, to strive for equitable future precision medicine-based clinical care and for the benefit of the whole rare disease community.

PMID:37621556 | PMC:PMC10445838 | DOI:10.1177/26330040231181406

Categories: Literature Watch

From target discovery to clinical drug development with human genetics

Wed, 2023-08-23 06:00

Nature. 2023 Aug;620(7975):737-745. doi: 10.1038/s41586-023-06388-8. Epub 2023 Aug 23.

ABSTRACT

The substantial investments in human genetics and genomics made over the past three decades were anticipated to result in many innovative therapies. Here we investigate the extent to which these expectations have been met, excluding cancer treatments. In our search, we identified 40 germline genetic observations that led directly to new targets and subsequently to novel approved therapies for 36 rare and 4 common conditions. The median time between genetic target discovery and drug approval was 25 years. Most of the genetically driven therapies for rare diseases compensate for disease-causing loss-of-function mutations. The therapies approved for common conditions are all inhibitors designed to pharmacologically mimic the natural, disease-protective effects of rare loss-of-function variants. Large biobank-based genetic studies have the power to identify and validate a large number of new drug targets. Genetics can also assist in the clinical development phase of drugs-for example, by selecting individuals who are most likely to respond to investigational therapies. This approach to drug development requires investments into large, diverse cohorts of deeply phenotyped individuals with appropriate consent for genetically assisted trials. A robust framework that facilitates responsible, sustainable benefit sharing will be required to capture the full potential of human genetics and genomics and bring effective and safe innovative therapies to patients quickly.

PMID:37612393 | DOI:10.1038/s41586-023-06388-8

Categories: Literature Watch

Rare diseases: why is a rapid referral to an expert center so important?

Wed, 2023-08-23 06:00

BMC Health Serv Res. 2023 Aug 23;23(1):904. doi: 10.1186/s12913-023-09886-7.

ABSTRACT

BACKGROUND: Patients with rare diseases usually go through years of diagnostic odysseys. The large number of rare diseases and the associated lack of expertise pose a major challenge to physicians. There are few physicians dealing with patients with rare diseases and they usually work in a limited number of specialized centers. The aim of this study was to evaluate the diagnostic efficiency of an expert center.

METHODS: The diagnostic pathway of 78 patients of the outpatient clinic for rare inflammatory systemic diseases with renal involvement was analyzed retrospectively. For this purpose, each examination day was documented with the corresponding examinations performed from the onset of initial symptoms. Three time points were considered: The time when patients first visited a physician with symptoms, the time when patients consulted an expert, and the time when they received the correct diagnosis. In addition, it was documented whether the diagnosis could be made without the expert, or only with the help of the expert. The examinations that confirmed the diagnosis were also documented for each patient.

RESULTS: A correct diagnosis was made without the help of the expert in only 21% of cases. Each patient visited an average of 6 physicians before consulting the expert. Targeted diagnostics enabled the expert to make the correct diagnosis with an average of seven visits, or one inpatient stay. However, referral to the expert took an average of 4 years.

CONCLUSION: The data show that rapid and targeted diagnostics were possible in the expert center due to the available expertise and the interdisciplinary exchange. Early diagnosis is of great importance for many patients, as an early and correct therapy can be decisive for the course of the disease.

PMID:37612679 | DOI:10.1186/s12913-023-09886-7

Categories: Literature Watch

Rehabilitation after Spinal Cord Injury : Current trends and principles

Wed, 2023-08-23 06:00

Unfallchirurgie (Heidelb). 2023 Aug 22. doi: 10.1007/s00113-023-01360-7. Online ahead of print.

ABSTRACT

Traumatic and non traumatic spinal cord injury are rare and an orphan disease in comparison to common diseases. Those affected represent a very special patient population in the treatment even at the site of the accident and in emergency medicine and require a high level of professional expertise. The rehabilitation with the complexity of a spinal cord injury can only succeed with a multiprofessional team that is less focused on the often similar diagnoses according to the International Classification of Diseases (ICD) but on functional disorders and associated activity impairments. Only then the best possible integration and participation/inclusion in sociocultural and professional life can be achieved. In addition to the importance of classical physiotherapy and occupational therapy, this article highlights important but often missing team players, such as neurourology and electrical stimulation. In addition, the problems of frequent and some less recognized complications, such as autonomic dysfunction and the benefits of airway management are highlighted. For a comprehensive overview of rehabilitation in spinal cord injury, reference textbooks and guidelines are recommended that are cited in the text.

PMID:37608182 | DOI:10.1007/s00113-023-01360-7

Categories: Literature Watch

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