1
|
van Lith PEA, Schreuder K, Jalving M, Reyners AKL, Been LB, Rácz E, Fransen HP, Louwman MWJ. Systemic therapy timing and use in patients with advanced melanoma at the end of life: A retrospective cohort study. J Dermatol 2024; 51:584-591. [PMID: 38078557 DOI: 10.1111/1346-8138.17061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Revised: 11/12/2023] [Accepted: 11/14/2023] [Indexed: 04/04/2024]
Abstract
Novel systemic therapies for advanced melanoma improve survival, but carry potential serious side effects and high costs. This study aimed to assess the timing and use of systemic therapies in the months before death. Patients diagnosed with advanced melanoma (July 2017-June 2020) who died before July 2020 were selected from the Netherlands Cancer Registry. We evaluated the timing of systemic therapies within 30 days and 3 months before death, and studied patient and tumor characteristics associated with systemic therapy use between diagnosis and death. Out of 1097 patients 68% received systemic therapy. Almost 25% and 10% started a new therapy within 90 days and within 30 days before death, respectively. Female sex, elevated LDH, BRAF mutation, poor ECOG performance status (≥3), and high comorbidity index reduced the odds of receiving immune therapy. Poor performance status and high comorbidity decreased the odds for both therapies. A considerable number of patients started systemic therapy shortly before death, emphasizing the importance of considering potential benefits and drawbacks through shared decision-making.
Collapse
Affiliation(s)
- P E A van Lith
- Department of Research and Development, Netherlands Comprehensive Cancer Organization, Utrecht, The Netherlands
- Department of Surgery, University Medical Centre Groningen, University of Groningen, Groningen, The Netherlands
| | - K Schreuder
- Department of Research and Development, Netherlands Comprehensive Cancer Organization, Utrecht, The Netherlands
| | - M Jalving
- Department of Medical Oncology, University Medical Centre Groningen, University of Groningen, Groningen, The Netherlands
| | - A K L Reyners
- Department of Medical Oncology, University Medical Centre Groningen, University of Groningen, Groningen, The Netherlands
| | - L B Been
- Department of Surgical Oncology, University Medical Centre Groningen, University of Groningen, Groningen, The Netherlands
| | - E Rácz
- Department of Dermatology, University of Medical Centre Groningen, University of Groningen, Groningen, The Netherlands
| | - H P Fransen
- Department of Research and Development, Netherlands Comprehensive Cancer Organization, Utrecht, The Netherlands
- Netherlands Association for Palliative Care (PZNL), Utrecht, The Netherlands
| | - M W J Louwman
- Department of Research and Development, Netherlands Comprehensive Cancer Organization, Utrecht, The Netherlands
| |
Collapse
|
2
|
Ferrándiz‐Pulido C, Gómez‐Tomás A, Llombart B, Mendoza D, Marcoval J, Piaserico S, Baykal C, Bouwes‐Bavinck J, Rácz E, Kanitakis J, Harwood C, Cetkovská P, Geusau A, del Marmol V, Masferrer E, Orte Cano C, Ricar J, de Oliveira W, Salido‐Vallejo R, Ducroux E, Gkini M, López‐Guerrero J, Kutzner H, Kempf W, Seçkin D. Clinicopathological features, MCPyV status and outcomes of Merkel cell carcinoma in solid-organ transplant recipients: a retrospective, multicentre cohort study. J Eur Acad Dermatol Venereol 2022; 36:1991-2001. [PMID: 35607918 PMCID: PMC9796956 DOI: 10.1111/jdv.18256] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2021] [Accepted: 04/13/2022] [Indexed: 01/07/2023]
Abstract
BACKGROUND The proportion of Merkel cell carcinomas (MCCs) in solid-organ transplant recipients (SOTR) harbouring Merkel cell polyomavirus (MCPyV) is unknown, as are factors affecting their outcomes. OBJECTIVE To describe clinicopathological features of MCC in SOTR, investigate the tumoral MCPyV-status and identify factors associated with tumour outcomes. METHODS Retrospective, international, cohort-study. MCPyV-status was investigated by immunohistochemistry and polymerase chain reaction. RESULTS A total of 30 SOTR and 44 consecutive immunocompetent patients with MCC were enrolled. SOTR were younger at diagnosis (69 vs. 78 years, P < 0.001). Thirty-three percent of SOTR MCCs were MCPyV-positive vs. 91% of immunocompetent MCCs (P = 0.001). Solid-organ transplantation was associated with an increased cumulative incidence of progression (SHR: 3.35 [1.57-7.14], P = 0.002), MCC-specific mortality (SHR: 2.55 [1.07-6.06], P = 0.034) and overall mortality (HR: 3.26 [1.54-6.9], P = 0.002). MCPyV-positivity and switching to an mTOR inhibitor (mTORi) after MCC diagnosis were associated with an increased incidence of progression (SHR: 4.3 [1.5-13], P = 0.008 and SHR: 3.6 [1.1-12], P = 0.032 respectively) in SOTR. LIMITATIONS Retrospective design and heterogeneity of SOTR cohort. CONCLUSIONS MCPyV appears to play a less prominent role in the aetiopathogenesis of MCC in SOTR. SOTR have a worse prognosis than their immunocompetent counterparts and switching to an mTORi after the diagnosis of MCC does not improve progression.
Collapse
Affiliation(s)
- C. Ferrándiz‐Pulido
- Department of DermatologyHospital Universitari Vall d'Hebron, Universitat Autònoma de BarcelonaBarcelonaSpain
| | - A. Gómez‐Tomás
- Department of DermatologyHospital Universitari Vall d'Hebron, Universitat Autònoma de BarcelonaBarcelonaSpain
| | - B. Llombart
- Servicio de DermatologíaInstituto Valenciano de OncologíaValenciaSpain
| | - D. Mendoza
- Department of DermatologyFundación Jiménez DíazMadridSpain
| | - J. Marcoval
- Department of DermatologyHospital de Bellvitge, IDIBELL, University of BarcelonaBarcelonaSpain
| | - S. Piaserico
- Dermatology Unit, Department of MedicineUniversità di PadovaPadovaItaly
| | - C. Baykal
- Department of DermatologyIstanbul University, Istanbul Medical FacultyIstanbulTurkey
| | - J.N. Bouwes‐Bavinck
- Department of DermatologyLeiden University Medical CenterLeidenThe Netherlands
| | - E. Rácz
- Department of DermatologyUniversity of Groningen, University Medical Center GroningenGroningenThe Netherlands
| | - J. Kanitakis
- Department of DermatologyEdouard Herriot Hospital Group, Hospices Civils de LyonLyonFrance
| | - C.A. Harwood
- Centre for Cell Biology and Cutaneous ResearchBlizard Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of LondonLondonUK
| | - P. Cetkovská
- Department of DermatovenereologyFaculty of Medicine, Charles UniversityPilsenThe Czech Republic
| | - A. Geusau
- Department of DermatologyMedical University of ViennaViennaAustria
| | - V. del Marmol
- Service de DermatologieHôpital Erasme, Université Libre de BruxellesBrusselsBelgium
| | - E. Masferrer
- Department of DermatologyHospital Universitari Mútua de TerrassaBarcelonaSpain
| | - C. Orte Cano
- Service de DermatologieHôpital Erasme, Université Libre de BruxellesBrusselsBelgium
| | - J. Ricar
- Department of DermatovenereologyFaculty of Medicine, Charles UniversityPilsenThe Czech Republic
| | | | - R. Salido‐Vallejo
- Department of DermatologyUniversity Clinic of Navarra, School of Medicine, University of NavarraPamplonaSpain
| | - E. Ducroux
- Department of DermatologyEdouard Herriot Hospital Group, Hospices Civils de LyonLyonFrance
| | - M.A. Gkini
- Centre for Cell Biology and Cutaneous ResearchBlizard Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of LondonLondonUK
| | - J.A. López‐Guerrero
- Laboratory of Molecular BiologyFundación Instituto Valenciano de OncologíaValenciaSpain,IVO‐CIPF Joint Research Unit of Cancer, Príncipe Felipe Research Center (CIPF)ValenciaSpain,Department of PathologySchool of Medicine, Catholic University of Valencia ‘San Vicente Martir’ValenciaSpain
| | | | - W. Kempf
- Kempf und Pfaltz Histologische Diagnostik and Department of DermatologyUniversity Hospital ZurichZürichSwitzerland
| | - D. Seçkin
- Department of DermatologyBaşkent University Faculty of MedicineAnkaraTurkey
| |
Collapse
|
3
|
Leus AJG, Horváth B, Terra JB, Diercks GFH, Plaat BEC, Oosting SF, Rácz E. Eligibility criteria for programmed death receptor 1 inhibitors vs. real-world advice: a retrospective analysis of 69 patients with advanced cutaneous squamous cell carcinoma of the head and neck. Br J Dermatol 2021; 186:371-372. [PMID: 34597438 PMCID: PMC9298061 DOI: 10.1111/bjd.20774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Revised: 09/15/2021] [Accepted: 09/26/2021] [Indexed: 11/30/2022]
Affiliation(s)
- A J G Leus
- Department of Dermatology, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - B Horváth
- Department of Dermatology, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - J B Terra
- Department of Dermatology, Isala Clinics, Zwolle, the Netherlands
| | - G F H Diercks
- Department of Pathology, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - B E C Plaat
- Department of Otorhinolaryngology, Head and Neck Surgery, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - S F Oosting
- Department of Medical Oncology, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - E Rácz
- Department of Dermatology, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| |
Collapse
|
4
|
Leus AJG, Frie M, Haisma MS, Terra JB, Plaat BEC, Steenbakkers RJHM, Halmos GB, Rácz E. Treatment of keratinocyte carcinoma in elderly patients - a review of the current literature. J Eur Acad Dermatol Venereol 2020; 34:1932-1943. [PMID: 32030838 PMCID: PMC7496368 DOI: 10.1111/jdv.16268] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2019] [Accepted: 01/21/2020] [Indexed: 12/13/2022]
Abstract
A large percentage of the patients with keratinocyte carcinoma (KC, formerly known as non‐melanoma skin cancer) is of advanced age and often too frail for standard therapies. However, no specific treatment recommendations are given for this population. This review aimed to give an overview of the current literature on the best practice for the treatment of elderly patients with KC. A literature search was performed in MEDLINE, using ‘keratinocyte carcinoma’, ‘elderly’, ‘treatment’ and various synonyms. Case reports, reviews, comments, non‐English literature and studies with a sample size <15 were excluded. After selection, a total of 47 studies were reviewed. Two types of studies were identified, focusing on (I) the effect of age on treatment outcomes and (II) alternative treatment schedules for elderly patients. Studies on surgery, the gold standard, describe larger lesions and defect size in the elderly population. Recurrence rate, complication rate and disease‐specific survival were not affected by age. Depending on the expected morbidity of a suggested (re‐)excision and patient preferences, a conservative watchful waiting policy can be agreed upon as a shared decision. Other common treatment modalities, such as adjuvant radiotherapy, photodynamic therapy and systemic therapy for basal cell carcinoma (BCC), show comparable results in the elderly and younger population. Alternative treatment schedules for elderly patients include primary hypofractionated radiotherapy, which seems effective and well‐tolerated, although research is limited to case series. Additionally, localized and topical treatments seem safe and effective especially for low‐risk tumours. Data are lacking on the efficacy of systemic therapies of metastatic KC in elderly patients. Efficacy of most treatments (with the exception of photodynamic therapy) is not dependent on age. There is need for more research on the efficacy of adjusted treatment modalities, such as hypofractionated radiotherapy and palliative or curative systemic treatment.
Collapse
Affiliation(s)
- A J G Leus
- Department of Dermatology, University Medical Center Groningen (UMCG), University of Groningen, Groningen, The Netherlands
| | - M Frie
- Department of Dermatology, University Medical Center Groningen (UMCG), University of Groningen, Groningen, The Netherlands
| | - M S Haisma
- Department of Dermatology, University Medical Center Groningen (UMCG), University of Groningen, Groningen, The Netherlands
| | - J B Terra
- Department of Dermatology, University Medical Center Groningen (UMCG), University of Groningen, Groningen, The Netherlands
| | - B E C Plaat
- Department of Otorhinolaryngology - Head and Neck Surgery, University Medical Center Groningen (UMCG), University of Groningen, Groningen, The Netherlands
| | - R J H M Steenbakkers
- Department of Radiotherapy, University Medical Center Groningen (UMCG), University of Groningen, Groningen, The Netherlands
| | - G B Halmos
- Department of Otorhinolaryngology - Head and Neck Surgery, University Medical Center Groningen (UMCG), University of Groningen, Groningen, The Netherlands
| | - E Rácz
- Department of Dermatology, University Medical Center Groningen (UMCG), University of Groningen, Groningen, The Netherlands
| |
Collapse
|
5
|
Rácz E, Gho C, Moorman PW, Noordhoek Hegt V, Neumann HAM. Treatment of frontal fibrosing alopecia and lichen planopilaris: a systematic review. J Eur Acad Dermatol Venereol 2013; 27:1461-70. [PMID: 23531029 DOI: 10.1111/jdv.12139] [Citation(s) in RCA: 91] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2012] [Accepted: 02/18/2013] [Indexed: 02/06/2023]
Abstract
Frontal fibrosing alopecia (FFA) is a primary lymphocytic cicatricial alopecia with characteristic clinical pattern of progressive frontotemporal hairline recession, perifollicular erythema and hyperkeratosis and symptoms of itch and burning, occurring mainly in post-menopausal women. FFA is considered a subtype of lichen planopilaris (LPP), based on their identical histopathology. Currently, no evidence-based treatment is available for FFA. Our aim was to determine the effectiveness of available treatment options for FFA, and to identify promising treatment options for future studies. For this, literature search was conducted to find all primary studies on the treatment of FFA and LPP. From the primary studies, data were subtracted and analysed. No randomized controlled trials were found, and one controlled trial. Treatment of 114 patients is described in the literature. They received 10 different regimes, of which oral 5-alpha-reductase inhibitors were provided most often, resulting in good clinical response in 45% of them. Hydroxychloroquine resulted in good clinical response in 30% of the 29 treated patients. Topical corticosteroid preparations are ineffective in FFA. The remaining treatments were all reported in less than 10 patients. For the treatment of LPP, topical corticosteroid preparations are the first line of treatment, followed by oral cyclosporine and systemic corticosteroids, although they are characterized by a high relapse rate. Summarizing, there is currently no effective treatment of FFA, the most effective being oral 5-alpha-reductase inhibitors that possibly affect the accompanying androgenetic alopecia. We argue that oral cyclosporine A might be a good candidate for future studies on the treatment of FFA.
Collapse
Affiliation(s)
- E Rácz
- Department of Dermatology and Venereology, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands
| | | | | | | | | |
Collapse
|
6
|
Rácz E, Prens EP, Kant M, Florencia E, Jaspers NG, Laman JD, de Ridder D, van der Fits L. Narrowband ultraviolet B inhibits innate cytosolic double-stranded RNA receptors in psoriatic skin and keratinocytes. Br J Dermatol 2011; 164:838-47. [PMID: 21143460 DOI: 10.1111/j.1365-2133.2010.10169.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
BACKGROUND The mode of action of narrowband ultraviolet B (NB-UVB) therapy in clearing psoriasis is incompletely understood, and in vivo studies at the molecular level in patients undergoing NB-UVB therapy are limited. We previously demonstrated increased expression and activity of double-stranded RNA (dsRNA) receptors in psoriasis lesions, and suggested that this enhanced innate signalling contributed to the maintenance of psoriatic inflammation. OBJECTIVES We investigated whether NB-UVB affects dsRNA receptor expression and function in vivo as well as in vitro. METHODS Skin samples of patients with psoriasis undergoing NB-UVB treatment were analysed for epidermal messenger RNA (mRNA) expression of the various dsRNA receptors by microarray and quantitative reverse transcription-polymerase chain reaction. Primary human keratinocytes were irradiated with NB-UVB and stimulated with interferon (IFN)-α or IFN-γ, critical cytokines in psoriasis. The dsRNA analogue polyriboinosinic-polyribocytidylic acid was used to assess the functional responsiveness of the cells to dsRNA. RESULTS NB-UVB therapy of patients with psoriasis resulted in a significantly reduced mRNA expression of the activating dsRNA receptors MDA5 (IFIH1) and RIG-I (DDX58). On the other hand, expression of LGP2 (DHX58), toll-like receptor 3 (TLR3) and PKR (EIF2AK2) was not affected. In vitro, NB-UVB irradiation completely blocked the upregulation of four of the dsRNA receptors in primary human keratinocytes stimulated with IFN-α or IFN-γ, resulting in an attenuated inflammatory response to dsRNA. CONCLUSIONS Our results show that NB-UVB irradiation inhibits the local innate inflammatory response to dsRNA, and suggest a novel mechanism of action of NB-UVB phototherapy in psoriasis.
Collapse
Affiliation(s)
- E Rácz
- Departments of Dermatology Immunology Genetics, Erasmus MC, University Medical Center, PO Box 2040, 3000 CA Rotterdam, the Netherlands
| | | | | | | | | | | | | | | |
Collapse
|
7
|
Rácz E, Eisler Z, Kertész J. Comment on "tests of scaling and universality of the distributions of trade size and share volume: evidence from three distinct markets". Phys Rev E Stat Nonlin Soft Matter Phys 2009; 79:068101-068102. [PMID: 19658633 DOI: 10.1103/physreve.79.068101] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2008] [Indexed: 05/28/2023]
Abstract
In a recent publication, Plerou and Stanley [Phys. Rev. E 76, 046109 (2007)] use the Meerschaert-Scheffler estimator to verify the "inverse half-cubic law" of trade size distributions. We show that this procedure systematically underestimates these tail exponents.
Collapse
Affiliation(s)
- Eva Rácz
- Institute of Physics, Budapest University of Technology and Economics, Budafoki út 8, Budapest H-1111, Hungary
| | | | | |
Collapse
|
8
|
Abstract
Sensitivity amplification has long been regarded as a virtually universal property of signal transduction cascades, yet a comprehensive parameter analysis remains a challenge even for relatively simple networks. We use a fast and accurate method to compute properties of multilevel cascades of activation-inactivation cycles and show that the monocyclic cascades amplify sensitivity only under specific conditions. In particular, it is found that efficient sensitivity amplification in a cascade, relative to the sensitivities of individual cycles, requires asymmetry in saturation of converter enzymes, with inhibitors much more saturated than activators.
Collapse
Affiliation(s)
- Eva Rácz
- Institute of Physics, Budapest University of Technology and Economics, H-1111 Budapest, Hungary.
| | | |
Collapse
|
9
|
Matesz C, Kovalecz G, Veress G, Deák A, Rácz E, Bácskai T. Vestibulotrigeminal pathways in the frog, Rana esculenta. Brain Res Bull 2008; 75:371-4. [PMID: 18331900 DOI: 10.1016/j.brainresbull.2007.10.049] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2007] [Revised: 10/18/2007] [Accepted: 10/18/2007] [Indexed: 11/28/2022]
Abstract
The aim of this study was to investigate whether primary vestibular afferent fibers establish direct connections with the motor and sensory trigeminal system in the brainstem of the frog. The experiments were carried out on Rana esculenta. In anaesthetized animals the trigeminal and vestibular nerves were prepared, and their proximal stumps were labeled either with fluorescein binding dextran amine (trigeminal nerve) or tetramethylrhodamine dextran amine (vestibulocochlear nerve). With a confocal laser scanning microscope we could detect close connections between the vestibular fibers and branches of the dorsal dendritic array of the jaw-closing motoneurons, suggestive of monosynaptic contacts. In the other parts of the brainstem, vestibular terminals were detected in the termination areas of the mesencephalic trigeminal nucleus and of the Gasserian (Vth) ganglion and they were probably involved in polysynaptic connections. In agreement with the results obtained in mammalian species, the present findings suggest that the vestibulotrigeminal relationship is quite complex and uses multiple pathways to connect the vestibular apparatus with the motor and sensory nuclei of the trigeminal nerve in the anurans as well.
Collapse
Affiliation(s)
- Clara Matesz
- Department of Anatomy, University of Debrecen, Medical and Health Science Center, Debrecen, Hungary.
| | | | | | | | | | | |
Collapse
|
10
|
Rácz E, Bácskai T, Halasi G, Kovács E, Matesz C. Organization of dye-coupled cerebellar granule cells labeled from afferent vestibular and dorsal root fibers in the frogRana esculenta. J Comp Neurol 2006; 496:382-94. [PMID: 16566006 DOI: 10.1002/cne.20922] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Application of neurobiotin to the nerves of individual labyrinthine organs and dorsal root fibers of limb-innervating segments of the frog resulted in labeling of granule cells in the cerebellum showing a significant overlap with a partial segregation in the related areas of termination. In different parts of the cerebellum, various combinations of different canal and otolith organ-related granule cells have been discerned. The difference in the extension of territories of vertical canals vs. horizontal canals may reflect their different involvement in the vestibuloocular and vestibulospinal reflex. Dye-coupled cells related to the lagenar and saccular neurons were localized in more rostral parts of the cerebellum, whereas cells of the utricle were represented only in its caudal half. This separation is supportive of the dual function of the lagena and the saccule. The territories of granule cells related to the cervical and lumbar segments of the spinal cord were almost completely separated along the rostrocaudal axis of cerebellum, whereas their territories were almost entirely overlapping in the mediolateral and ventrodorsal directions. The partial overlap of labyrinthine organ-related and dorsal root fiber-related granule cells are suggestive of a convergence of sensory modalities involved in the sense of balance. We propose that the afferent input of vestibular and proprioceptive fibers mediated by gap junctions to the cerebellar granule cells subserve one of the possible morphological correlates of a very rapid modification of the motor activity in the vestibulocerebellospinal neuronal circuit.
Collapse
Affiliation(s)
- Eva Rácz
- Department of Anatomy, University of Debrecen, Medical and Health Science Center, Hungary
| | | | | | | | | |
Collapse
|
11
|
Abstract
Benign familial chronic pemphigus (Hailey-Hailey disease, HHD) is a rare hereditary condition characterized by development of blisters at sites of friction and in the intertriginous areas. Mutations in the ATP2C1 gene, which encodes the human secretory pathway calcium ATPase 1 (hSPCA1), have been identified as possible causative mutations. Studying Hungarian patients with HHD, we found two novel, distinct, heterozygous mutations. In a 65-year-old man with a 41-year history of severe recurrent symptoms, a single nucleotide insertion, 1085insA, was detected. In a patient whose symptoms were induced by environmental contact allergens, we found a nonsense mutation, Q506X, in exon 17. Our study further illustrates the diversity of mutational events in the pathogenesis of HHD.
Collapse
Affiliation(s)
- E Rácz
- Department of Dermato-Venereology, Semmelweis University, Budapest, Hungary.
| | | | | |
Collapse
|
12
|
Abstract
Mutation analysis in the ATP2A2 gene had been performed in eight Hungarian patients with Darier's disease (DD), to get more information about phenotype-genotype relations. All patients had moderate to severe skin symptoms. Polymerase chain reaction (PCR) amplification of the entire coding region of ATP2A2 was performed. Mutation detection strategies included heteroduplex scanning by conformation-sensitive gel electrophoresis (CSGE) and direct nucleotide sequencing. We found distinct, heterozygous mutations (five missense, one nonsense, one deletion, and one insertion), six of which were novel. In a 31-year-old DD woman with learning difficulties we disclosed a previously described missense mutation (D702N) in exon 15. A 44-year-old DD woman had a novel T insertion at nucleotide 559 in exon 7 of the ATP2A2 gene, which resulted in a premature termination codon (PTC) at codon 192. A woman, whose skin symptoms developed unusually late, at the age 50, had a new T deletion (1320delT) in exon 11 resulting in a PTC at codon 448. Our most severe case had a known missense mutation N39T, resulting in a non-conservative amino acid change at the upstream stalk region. Three new missense mutations (A161D, R164S, and Q790P) affected conservative regions of the SERCA2 protein within the activation (A)-domain and the M6 transmembrane region. A further new nonsense mutation (C909X) was detected in the M8 transmembrane domain. Our data suggest that differences in DD phenotypes are probably also related to factors different from the type of causative mutation.
Collapse
Affiliation(s)
- E Rácz
- Semmelweis University, Department of Dermato-Venereology, Budapest, Hungary.
| | | | | | | | | |
Collapse
|
13
|
Rácz E. [Quo vadis "suprema lex"?]. Orv Hetil 1999; 140:383. [PMID: 10091507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
|
14
|
Abstract
The present study was designed to determine the effect of anisocytosis on the association of MCV values with HbA1c and reticulocyte counts as markers of red cell age. Normo-, micro- and macrocytic samples, fractionated by counterflow centrifugal elutriation were studied. The previously described correlation between MCV and HbA1c was only observed in normal samples and in the middle fractions of samples with anisocytosis. At both extremes of the elutriation profile, curves for HbA1c content and reticulocyte count levelled out. Furthermore, in fractions containing the largest red cells of the microcytic series and the smallest red cells of normo- and macrocytic samples, reticulocyte count decreased while HbA1c content increased with increasing MCV. From these data it is concluded that MCV is not an absolute determinant of red cell age in case of anisocytosis.
Collapse
Affiliation(s)
- A Kocsis
- Department of Clinical Biochemistry and Molecular Pathology, University Medical School, Debrecen, Hungary
| | | | | | | | | |
Collapse
|
15
|
Abstract
Direct modification of proteins by fatty acid can occur as cotranslational N-myristoylation of an N-terminal glycine residue or as posttranslational thioesterification of cysteine residue(s). Platelets provide an excellent model system for studying the posttranslational type of modification in the absence of active protein synthesis and in the absence of protein synthesis-related protein modifications with lipids. Using this model system it was shown that thioesterification of proteins with fatty acid is less specific for palmitate than it was thought earlier and that other saturated, mono- and even polyunsaturated long chain fatty acids can also participate. The chain length and the extent of unsaturation of the protein-linked fatty acid moiety can, very likely, modulate hydrophobic protein-membrane lipid and protein-protein interactions. CD9, HLA class I glycoprotein, glycoproteins Ib, IX and IV, P-selectin and alpha subunits of G proteins have been demonstrated unequivocally as S-fatty acid acylated platelet proteins.
Collapse
Affiliation(s)
- L Muszbek
- University School of Medicine, Department of Clinical Chemistry, Debrecen, Hungary
| | | | | |
Collapse
|
16
|
Rácz E. [In memory of Miklós Frank, M.D]. Orv Hetil 1996; 137:2585. [PMID: 9005390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
|
17
|
Rácz E. [Comment on the question of consultation with the medical specialist]. Orv Hetil 1991; 132:2939. [PMID: 1766664] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
|
18
|
Stanciu E, Csiky K, Rácz E. [Significance and identification of 3,4-dimethoxyphenylethylamine in the urine of schizophrenic patients (pink spot reaction)]. Neurol Psihiatr Neurochir 1971; 16:305-12. [PMID: 5118389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
|
19
|
Rácz E. [Experiences with a new antihypertensive drug combination]. Orv Hetil 1966; 107:1940-2. [PMID: 5978537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
|