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1.
Eur J Oncol Nurs ; 69: 102538, 2024 Apr.
Article in English | MEDLINE | ID: mdl-38457934

ABSTRACT

OBJECTIVE: To investigate the quality of life (QoL) and the impact of caregiving in family caregivers of hematological cancer patients and its association with patient symptom burden. METHODS: A cross-sectional study including Danish patients (n = 375) and caregivers (n = 140). Caregivers completed scales for anxiety and depression using the Hospital Anxiety and Depression Scale, sleep quality using the Pittsburgh Sleep Quality Index, health related QoL using the 12-item Short-Form Health Survey, and caregiver roles using the Caregiver Roles and Responsibilities Scale. Patients reported symptoms using the MD Anderson Symptom Inventory. Analysis of covariance was used to examine associations between patient symptom burden and caregivers' QoL outcomes. RESULTS: The results show that caregivers experience sleep difficulties, moderate anxiety, and reduced QoL. Patient symptom burden was significantly associated with caregiver anxiety (p = 0.009), and mental well-being (p = 0.002), while patient treatment status was a significant factor associated with caregiver anxiety (p = 0.016), depression (p = 0.009), emotional well-being (p = 0.002), and sleep (p = 0.01). CONCLUSION: Caregivers of patients with hematological cancers undergoing active treatment face a high symptom burden, which significantly impacts their QoL, including sleep, psychological well-being, and emotional health. Patients reported a high symptom burden, and patient symptom burden was significantly associated with caregiver QoL. Adequate patient and caregiver support is needed to promote their well-being and mitigate adverse health effects in caregivers, and this should be acknowledged in the context of caring for patients with hematological cancer.


Subject(s)
Hematologic Neoplasms , Quality of Life , Humans , Quality of Life/psychology , Caregivers/psychology , Cross-Sectional Studies , Symptom Burden , Depression/psychology , Anxiety/psychology , Denmark
2.
Res Involv Engagem ; 9(1): 115, 2023 Dec 07.
Article in English | MEDLINE | ID: mdl-38062535

ABSTRACT

BACKGROUND: Patient and Public Involvement (PPI) in health research is gaining increased attention and acceptance worldwide. Reliable measurements are crucial to accurately assess, monitor, and evaluate patient involvement efforts in research. The Patient Engagement in Research Scale (PEIRS-22) measures meaningful patient and family caregiver engagement in research. This study focuses on three primary objectives: (1) translation of the PEIRS-22 from English to Danish, followed by linguistic validation and cultural adaptation; (2) assessing the applicability of the Danish PEIRS-22; and (3) focus group interviews to explore the user experiences of PPI. METHODS: A three-phase multi-method study was conducted. In phase one, the PEIRS-22 was translated, linguistically validated and culturally adapted to Danish. In phase two individuals from three distinct patient cancer advisory boards responded to the Danish version of PEIRS-22 to assess its applicability. Three focus group interviews were conducted in phase three, involving individuals from three patient cancer advisory boards. RESULTS: The translation process resulted in a Danish version of PEIRS-22, conceptually and culturally equivalent to the English version. Overall, among individuals of the three advisory boards (n = 15) the applicability was found to be satisfactory, with no missing data and all items completed. The total PEIRS-22 score among the three advisory boards was 85.2 out of a possible 100, with higher scores indicating greater meaningful involvement. A nested sample of the three patient cancer advisory boards (n = 9) participated in focus group interviews. The analysis yielded four themes: (1) The Danish PEIRS-22 captured the intended cultural meaning and contributed to self-reflection, (2) Internal motivation is a driver for involvement (3), Involvement brought a personal sense of empowerment and (4) Meaningful involvement collaborations are fostered by a trustful atmosphere. CONCLUSIONS: The PEIRS-22 questionnaire has been translated, linguistically validated, and culturally adapted into Danish. We propose that the PEIRS-22 is now ready for use in Danish populations. This study provides a Danish version of the questionnaire that can be used to develop patient-centred practices and foster meaningful involvement and collaborations between patients and researchers in the field of cancer research in Denmark. Personal benefits of participating in PPI can vary, and we recommend using PEIRS-22 in conjunction with a qualitative approach to better explore perspectives on meaningful involvement. TRIAL REGISTRATION: The study was registered prospectively on October 22, 2022, by the Danish Data Protection Agency (jr. nr. P-2022-528).


Patient and public involvement (PPI) in research can improve research practices by ensuring that patients' voices are heard. Individuals' lived experiences and unique viewpoints can contribute to refining research aims, ensuring they align with the needs and priorities of the target population. There is a growing interest in inviting patients into the research team as patient partners, for example, by establishing patient advisory boards. PPI can also involve caregivers and other stakeholders who are not usually thought of as members of the research team. For that reason, broadening our understanding of establishing meaningful PPI starts with measuring patient and family caregiver involvement. As such, the Patient Engagement In Research Scale (PEIRS-22) has been developed in the English language to measure meaningful patient and caregiver involvement. In this study, we aimed to (1) create a Danish version of the PEIRS-22 that respects any unique feature of Danish people, (2) assess the applicability of the Danish PEIRS-22, and (3) via focus-group interviews explore the user experiences of PPI. The patients and caregiver who were interviewed as part of the translation process expressed that the PEIRS-22 was easy to understand and captured the intended meanings. Fifteen other patient partners responded to the Danish version of PEIRS-22, and nine of them participated in the focus group interviews. One result was that creating a trusting and social atmosphere within the research group is important for promoting a personal sense of involvement.

3.
Res Involv Engagem ; 9(1): 72, 2023 Aug 30.
Article in English | MEDLINE | ID: mdl-37649111

ABSTRACT

BACKGROUND: Over the past decades, there has been a growing international interest in user involvement in healthcare research. However, evidence on the management and impact of patient and public involvement in Nordic healthcare research remains limited. OBJECTIVE: The aim was to explore and delineate the current state, practice, and impact of patient and public involvement in healthcare research across different areas of healthcare and patient populations in the Nordic countries. METHODS: We conducted a scoping review using nine scientific databases and gray literature from 1992-2023. Sources were categorized as empirical or non-empirical. We used the Guidance for Reporting Involvement of Patients and the Public Short Form 2 checklist for reporting of patient and public involvement in healthcare research and the Preferred Reporting Items for Systematic reviews and Meta-Analyses extension for Scoping Reviews. RESULTS: A total of 56 publications were included, consisting of 39 empirical and 17 non-empirical sources. Gray literature varied among countries and institutions encompassing different types of documents. We found an increase in the number of publications on patient and public involvement in Nordic healthcare research. This was evidenced by the growing number of references and institutional initiatives intended at involving the public, indicating the increasing emphasis on patient and public involvement in Nordic healthcare research. The terminology used to describe patient and public involvement varied over time. However, there has been a gradual narrowing down of terms as the concept of PPI has become more integrated into research practices, particularly with the involvement of funding agencies. CONCLUSION: The utilization of patient and public involvement in Nordic healthcare research has substantially increased, proliferated, and gained widespread acceptance across diverse healthcare domains. The variety of approaches challenged our scoping review in terms of systematic description and impact. Patient and public involvement was applied in one or more research stages using different methodologies and terms. International agreement on terms and definitions is needed for reliable interpretation of the use of patient and public involvement in Nordic healthcare research.


Over the past decades the importance of involving patients and the public as active partners in healthcare research has received growing acknowledgement internationally. Nonetheless, our knowledge regarding the degree of patient and public involvement (PPI) in the Nordic countries remains limited. This paper addresses this gap by investigating the status, management, and influence of PPI in healthcare research within the Nordic countries. The review of these aspects has given us a better understanding of PPI and its effects on healthcare research in the Nordic region. We looked at scientific databases and webpages including research papers, commentaries, and other materials from Denmark, Norway, Sweden, Finland, and Iceland. Our goal was to gather information and provide a thorough overview of PPI practices. Our findings showed that PPI is growing with gained acceptance across different areas of health research. PPI was used at different stages of the research process, but there wasn't a common agreement on its importance and the additional value it brings to the quality of research. The study was challenged by the many different terms and definitions, which affected the clarity of our study's purpose (or goals).However, we made efforts to address this by carefully reviewing the different terms and definitions used in the literature, striving to capture the essence of PPI in our analysis. By acknowledging this variation, we aimed to provide a wide-ranging overview while identifying the complexities and nuances related with PPI in the Nordic healthcare research. We assume that achieving international agreement on terms and definitions of PPI would certainly improve the trustworthiness in future reviews.

4.
Brain Inj ; 36(9): 1158-1166, 2022 07 29.
Article in English | MEDLINE | ID: mdl-36047479

ABSTRACT

BACKGROUND: Traumatic brain injury significantly impacts survivors and their families. Rehabilitation following traumatic brain injury is often complex due to the physical, psychological, and socio-economic problems survivors face. Life goals are considered a motivational factor in rehabilitation. OBJECTIVE: The aim was to explore expectations, problems, and strategies for goal setting in survivors of traumatic brain injury and their family caregivers for one-year during rehabilitation. METHODS: A longitudinal qualitative study using dyadic interviews with survivors and family caregivers was carried out at three time points during the first year following traumatic brain injury. Data was analyzed according to Braun and Clarke's thematic analysis. RESULTS: Eight survivors of traumatic brain injury and their family caregivers completed 24 interviews. Three themes and one sub-theme were identified: 1) life goals as a driving force (subtheme: dyadic discrepancies and conflicts); 2) conflicts between specific, measurable, achievable, realistic, and timed (SMART) goals and life goals; and 3) changing perceptions of the impact of impairments.Life goals are important motivation in the rehabilitation process. Health care professionals must integrate life goals and rehabilitation goals (i.e. SMART goals) to decrease barriers and survivor ambivalence about rehabilitation. Involving both survivors and family caregivers in goal setting increases rehabilitation success.


Subject(s)
Brain Injuries, Traumatic , Goals , Brain Injuries, Traumatic/psychology , Caregivers/psychology , Humans , Qualitative Research , Survivors/psychology
5.
Support Care Cancer ; 30(8): 6923-6935, 2022 Aug.
Article in English | MEDLINE | ID: mdl-35543814

ABSTRACT

PURPOSE: This study investigated the feasibility of a one-on-one peer support intervention in family caregivers of newly diagnosed patients with a hematological cancer during initial treatment. METHODS: The study was a one-arm feasibility study including family caregivers of newly diagnosed patients with hematological cancer (n = 26) and caregiver ambassadors who were family caregivers of previously treated patients as peer supporters (n = 17). The one-on-one peer support intervention consisted of three components: a caregiver ambassador preparatory course; 12 weeks of one-on-one peer support, and caregiver ambassador network meetings. RESULTS: Family caregivers reported high satisfaction with the delivery and flexibility of one-on-one peer support and improved in most psychosocial outcomes over time. Telephone and text messages were the most used form of contact between the peers. Caregiver ambassadors reported high satisfaction with the preparatory course and used the available support from the network meetings. No adverse events were reported. CONCLUSION: One-on-one peer support provided by a caregiver ambassador is feasible and safe in family caregivers of newly diagnosed hematological cancer patients during their initial treatment. Utilizing volunteer caregiver ambassadors has the potential to be a new support model in family caregivers of hematological cancer patients across diagnostic groups within a clinical setting. CLINICAL TRIAL REGISTRATION NUMBER: NCT04039100, July 29, 2019.


Subject(s)
Caregivers , Hematologic Neoplasms , Caregivers/psychology , Family , Feasibility Studies , Hematologic Neoplasms/therapy , Humans , Quality of Life/psychology , Telephone
6.
Cancer Nurs ; 45(5): E801-E809, 2022.
Article in English | MEDLINE | ID: mdl-35067578

ABSTRACT

BACKGROUND: Family caregivers play a vital role in providing care and support for patients with life-threatening hematologic diseases. Extensive patient care needs and long-term treatment trajectories can negatively affect the health of caregivers. Despite the importance of supporting caregivers, few studies examine family caregivers' experiences and support needs during treatment. OBJECTIVE: To explore the role, experiences, and needs of family caregivers of patients with hematologic malignancies during treatment. METHODS: An exploratory longitudinal qualitative study using serial semistructured interviews with caregivers of hematologic patients was carried out. Data were analyzed using thematic analysis. RESULTS: A sample of 16 caregivers completed 47 interviews. Three themes and 2 subthemes were identified: (1) committing to an unconditional mission while adjusting to a changeable situation: developing resilience over time; (2) being an invisible and inseparable sufferer: cultivating hope one day at a time; and (3) balancing between sacrificing one's own needs and self-care. CONCLUSIONS: During treatment, caregivers face long-term psychological and physical distress, social isolation, and loneliness due to the extended life-threatening situation imposing shifting challenges and needs. Future research should explore the concept of social support in caregiver resilience and investigate psychosocial interventions in hematologic caregivers. IMPLICATIONS FOR PRACTICE: Healthcare professionals should address caregiver needs throughout the patient's treatment and provide new supportive initiatives to lessen the burden of care in hematologic caregivers. Facilitating peer support and deploying a family-oriented approach considering the patient-caregiver dyad as a subject for care have implications for clinical nursing practice.


Subject(s)
Caregivers , Hematologic Neoplasms , Adaptation, Psychological , Adult , Caregivers/psychology , Hematologic Neoplasms/therapy , Humans , Longitudinal Studies , Qualitative Research
7.
Trials ; 16: 280, 2015 Jun 21.
Article in English | MEDLINE | ID: mdl-26093636

ABSTRACT

BACKGROUND: Individual Placement and Support (IPS) appears to be an effective vocational intervention for obtaining competitive employment for people with severe mental illness. However, no IPS studies or trials have been conducted in Denmark, a country characterized by a specialized labor market with a higher minimum wage and fewer entry-level jobs in comparison with other countries such as the US. Furthermore, long-term job retention and economic self-sufficiency have not been clearly demonstrated. Integrating methods such as cognitive remediation and work-related social skills training may be ways to address these issues. METHODS/DESIGN: The trial design is an investigator-initiated, randomized, assessor-blinded, multi-center trial. A total of 750 patients with severe mental illness will be randomly assigned into three groups: (1) IPS, (2) IPS enhanced with cognitive remediation and work-related social skills training, and (3) service as usual. The primary outcome is number of hours in competitive employment or education at 18-month follow-up. Secondary and exploratory outcomes are money earned, days to first employment, symptoms, functional level, self-esteem, and self-efficacy at 18-month follow-up. Thirty- and 60-month follow-ups will be register-based. DISCUSSION: This will be one of the largest randomized trials investigating IPS to date. The trial will be conducted with high methodological quality in order to reduce the risk of bias. If the results of this trial show that IPS, or IPS enhanced with cognitive remediation and work-related social skills training, is superior to service as usual, this will support preliminary evidence. Furthermore, it will show that the method is generalizable to a variety of labor markets and welfare systems and provide important knowledge about the effect of adding cognitive remediation and social skills training to the IPS intervention. TRIAL REGISTRATION: ClinicalTrials registration number: NCT01722344 (registered 2 Nov. 2012).


Subject(s)
Cognition , Cognitive Behavioral Therapy/methods , Employment, Supported/psychology , Mental Disorders/rehabilitation , Persons with Mental Disabilities/rehabilitation , Rehabilitation, Vocational/methods , Social Skills , Adaptation, Psychological , Adolescent , Adult , Aged , Denmark , Education of Intellectually Disabled , Female , Humans , Job Description , Male , Mental Disorders/diagnosis , Mental Disorders/psychology , Middle Aged , Persons with Mental Disabilities/psychology , Research Design , Self Concept , Self Efficacy , Time Factors , Treatment Outcome , Vocational Education , Young Adult
8.
J Phys Chem A ; 117(7): 1522-30, 2013 Feb 21.
Article in English | MEDLINE | ID: mdl-23350693

ABSTRACT

The infrared (IR) spectra of size-selected phenol-ammonia clusters, PhOH-(NH(3))(n) (n ≤ 11) in the 3-10 µm wavelength region were measured to investigate the critical number of solvent molecules necessary to promote the ground state proton transfer (GSPT) reaction. While the N-H stretching vibrations did not provide clear information, characteristic changes that are assigned to the GSPT reaction were observed in the skeletal vibrational region. The production of phenolate anion (PhO(-)), which is a product of the GSPT reaction, was established from the appearance of characteristic bands assignable to C-C stretching and C-H bending vibrations of PhO(-) and from the corresponding disappearance of C-O-H bending vibration of PhOH at n = 9. The mid-IR spectroscopy directly proves the structural change induced by the deprotonation from the O-H bond and thus establishes the GSPT reaction as complete at n = 9. No such absorptions were observed for n ≤ 5 in line with a previous report. For n = 6-8, both the proton transferred and the nontransferred signatures were observed in the spectra, showing coexistence of both species for the first time.

9.
J Am Chem Soc ; 131(31): 11091-7, 2009 Aug 12.
Article in English | MEDLINE | ID: mdl-19621925

ABSTRACT

The excitation spectrum of the protonated benzene dimer has been recorded in the 415-600 nm wavelength range. In contrast to the neutral iso-electronic benzene dimer, its absorption spectrum extends in the visible spectral region. This huge spectral shift has been interpreted with ab initio calculations, which indicate that the first excited states should be charge transfer states.

10.
J Phys Chem A ; 111(42): 10537-43, 2007 Oct 25.
Article in English | MEDLINE | ID: mdl-17914773

ABSTRACT

The aging process of the human lens is associated with accumulation of chromophores and fluorophores that impair visual function. In the present study, we examined the photodissociation of 3-OH-kynurenine and argpyrimidine. Furthermore, absorption spectra obtained in gas phase using an electrostatic ion storage ring were studied as gas phase absorption have been shown to be more similar to the in vivo condition than absorption spectra obtained in the liquid phase. Experimental results were compared to theoretical modeling using the multistate, multireference perturbation theory approach combined with advanced molecular modeling tools to account for the solvent effects and to provide direct support for band assignments. Absorption maxima were determined both experimentally and theoretically and significant differences between the two chromophores were found. In particular, 3-OH-kynurenine demonstrated a blue-shift of more than 130 nm in the aqueous phase compared to the gas-phase due to the existence of different 3-OH-kynurenine conformers, which are stable under different conditions and originate from the interplay between intra- and intermolecular interactions. Photodissociation of argpyrimidine and 3-OH-kynurenine was observed in vacuum thus confirming the results previously obtained in liquid phase demonstrating that the photodestruction takes place in both media.


Subject(s)
Gases , Kynurenine/analogs & derivatives , Lens, Crystalline/chemistry , Ornithine/analogs & derivatives , Protons , Pyrimidines/chemistry , Absorption , Enzyme-Linked Immunosorbent Assay , Humans , Ions , Models, Theoretical , Molecular Conformation , Ornithine/chemistry , Photochemistry , Spectrum Analysis , Static Electricity , Time Factors , Water/chemistry
11.
J Phys Chem A ; 111(21): 4567-72, 2007 May 31.
Article in English | MEDLINE | ID: mdl-17477513

ABSTRACT

The photoinduced fragmentation of a retinal model chromophore (all-trans-n-butyl protonated Schiff-base retinal) was studied in vacuo using a new experimental technique. The apparatus is able to record the photodissociation yield of gas-phase biomolecular ions in the first microseconds after absorption. Together with the existing ion storage ring ELISA, which operates on the millisecond to second time scale, the complete decay dynamics of such molecules can now be followed. In the case of retinal, the time-dependent fragmentation yield observed after irradiation with a 410 nm laser pulse exhibits contributions from one- and two-photon absorption, which decay non-exponentially with lifetimes on the order of 1 ms and 1 micros, respectively. The decay can be simulated using a statistical model, yielding good agreement with the experimental findings on both the millisecond and the microsecond time scales. No indication for nonstatistical processes is found for this molecule, the upper limit for a possible direct rate being a factor of 10(4) below the observed statistical dissociation rate.


Subject(s)
Butanes/chemistry , Gases , Light , Retinaldehyde/chemistry , Schiff Bases/chemistry , Absorption , Butanes/metabolism , Enzyme-Linked Immunosorbent Assay , Models, Biological , Models, Statistical , Monte Carlo Method , Photons , Retinaldehyde/metabolism , Schiff Bases/metabolism , Time Factors
12.
J Phys Chem A ; 110(46): 12592-6, 2006 Nov 23.
Article in English | MEDLINE | ID: mdl-17107108

ABSTRACT

The neutral retinal Schiff base is connected to opsin in UV sensing pigments and in the blue-shifted meta-II signaling state of the rhodopsin photocycle. We have designed and synthesized two model systems for this neutral chromophore and have measured their gas-phase absorption spectra in the electrostatic storage ring ELISA with a photofragmentation technique. By comparison to the absorption spectrum of the protonated retinal Schiff base in vacuo, we found that the blue shift caused by deprotonation of the Schiff base is more than 200 nm. The absorption properties of the UV absorbing proteins are thus largely determined by the intrinsic properties of the chromophore. The effect of approaching a positive charge to the Schiff base was also studied, as well as the susceptibility of the protonated and unprotonated chromophores to experience spectral shifts in different solvents.


Subject(s)
Retina/metabolism , Schiff Bases/chemistry , Animals , Enzyme-Linked Immunosorbent Assay , Humans , Light , Models, Chemical , Protons , Rhodopsin/chemistry , Signal Transduction , Solvents/chemistry , Spectrophotometry , Static Electricity , Time Factors , Ultraviolet Rays
13.
Org Biomol Chem ; 4(8): 1546-54, 2006 Apr 21.
Article in English | MEDLINE | ID: mdl-16604223

ABSTRACT

Retinal Schiff bases serve as chromophores in many photoactive proteins that carry out functions such as signalling and light-induced ion translocation. The retinal Schiff base can be found as neutral or protonated, as all-trans, 11-cis or 13-cis isomers and can adopt different conformations in the protein binding pocket. Here we present the synthesis and characterisation of isomeric retinylidene iminium salts as mimics blocked towards isomerisation at the C11 position and conformationally restrained. The intrinsic chromophoric properties are elucidated by gas phase absorption studies. These studies reveal a small blue-shift in the S0-->S1 absorption for the 11-locked derivative as compared to the unlocked one. The gas phase absorption spectra of all the cationic mimics so far investigated show almost no absorption in the blue region. This observation stresses the importance of protein interactions for colour tuning, which allows the human eye to perceive blue light.


Subject(s)
Imines/chemistry , Retinaldehyde/chemistry , Retinaldehyde/chemical synthesis , Retinoids/chemistry , Rod Opsins/chemistry , Computer Simulation , Crystallography, X-Ray , Imines/chemical synthesis , Magnetic Resonance Spectroscopy , Models, Molecular , Molecular Structure , Retinaldehyde/analogs & derivatives , Schiff Bases/chemistry
14.
J Am Chem Soc ; 127(35): 12347-50, 2005 Sep 07.
Article in English | MEDLINE | ID: mdl-16131214

ABSTRACT

The absorption spectrum of the all-trans retinal chromophore in the protonated Schiff-base form, that is, the biologically relevant form, has been measured in vacuo, and a maximum is found at 610 nm. The absorption of retinal proteins has hitherto been compared to that of protonated retinal in methanol, where the absorption maximum is at 440 nm. In contrast, the new gas-phase absorption data constitute a well-defined reference for spectral tuning in rhodopsins in an environment devoid of charges and dipoles. They replace the misleading comparison with absorption properties in solvents and lay the basis for reconsidering the molecular mechanisms of color tuning in the large family of retinal proteins. Indeed, our measurement directly shows that protein environments in rhodopsins are blue- rather than red shifting the absorption. The absorption of a retinal model chromophore with a neutral Schiff base is also studied. The data explain the significant blue shift that occurs when metharhodopsin I becomes deprotonated as well as the purple-to-blue transition of bacteriorhodopsin upon acidification.


Subject(s)
Bacteriorhodopsins/chemistry , Retinaldehyde/chemistry , Rhodopsin/chemistry , Schiff Bases/chemistry , Protons , Solvents/chemistry , Spectrophotometry
15.
Am J Hematol ; 74(1): 26-31, 2003 Sep.
Article in English | MEDLINE | ID: mdl-12949887

ABSTRACT

Eighty-three patients with various chronic myeloproliferative disorders [polycythemia vera (PV), essential thrombocytosis (ET), idiopathic myelofibrosis (IMF)] were analyzed for the occurrence of acute myeloid leukemia (AML) and myelodysplasia (MDS) during treatment with hydroxyurea (HU) alone or HU following treatment with busulphan (BU). A total of 58 patients (29 PV, 14 ET, 12 IMF, 3 unclassified) had been treated with HU. Thirty-five of these patients had been treated with HU alone whereas 18 patients had received both HU and BU. The follow-up period was 7.8 years. Twenty-five patients had not been treated with HU. In this patient group, 4 patients had been treated with BU. The follow-up period was 10.5 years. In the HU-treated group (n = 58) 7 patients developed AML and 5 patients MDS. Five of the 12 patients had been treated with HU alone, and 4 patients had received both HU and BU. In the non-HU-treated group (n = 25) 1 patient with PV developed acute myeloid leukemia (AML). This patient had only been treated with phlebotomies. It is concluded that treatment with HU is leukemogenic, with an incidence of AML and MDS of approximately 14% when used alone. The incidence is markedly increased to about 30% when HU is preceded by treatment with BU. HU is not recommended for use in younger patients, in whom non-leukemogenic agents such as alpha-interferon and anagrelide should be used instead.


Subject(s)
Alkylating Agents/adverse effects , Busulfan/adverse effects , Hydroxyurea/adverse effects , Leukemia/chemically induced , Myelodysplastic Syndromes/chemically induced , Myeloproliferative Disorders/drug therapy , Myeloproliferative Disorders/genetics , Philadelphia Chromosome , Acute Disease , Chronic Disease , Drug Therapy, Combination , Female , Humans , Male , Middle Aged , Primary Myelofibrosis/chemically induced , Retrospective Studies , Survival Analysis
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