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The myelodysplastic syndromes (MDS) are a group of clonal hematopoietic stem cell diseases characterized by ineffective hematopoiesis
in one or more cell lines, resulting in insufficient bone marrow function. For most patients with MDS, supportive care by
blood transfusions is still the mainstay of treatment. Especially in low-risk patients, anemia represents the major clinical
problem, and many of these patients develop transfusional iron overload. This paper reviews the literature on transfusional
iron overload in patients with MDS, looking at pathophysiology, evaluation, and treatment of the transfusional iron burden
with desferrioxamine and oral chelators. 相似文献
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Lars Tue Sørensen MD Birgitte Toft MD Jørgen Rygaard MD DMSci Steen Ladelund Børge Teisner MD Finn Gottrup MD DMSci 《Wound repair and regeneration》2010,18(2):186-192
Full‐thickness 5 mm punch biopsy wounds were made lateral to the sacrum in 48 smokers and 30 never smokers. After 1 week, the wounds were excised and fixed. The smokers were then randomized to continuous smoking or abstinence with a transdermal nicotine patch or a placebo patch. The sequence of wounding and excision was repeated after 4, 8, and 12 weeks. All excised tissue was stained with hematoxylin–eosin and immunohistochemically for macrophages (CD68), procollagen 1 N‐terminal propeptide (PINP) in fibroblasts, and endothelial cells (CD31). The cellularity was assessed and scored by two independent histopathologists, and for the analysis, proportional odds models and random effect models for repeated measurements were applied. Macrophages and PINP‐stained fibroblasts were reduced in the smokers' wounds (0.28 [0.14–0.58] [OR, 95%CI]; p=0.01 and 0.37[0.19–0.70]; p<0.01, respectively, when compared with never smokers' wounds). Inflammation scores were marginally affected. Following smoking cessation, inflammatory cell infiltration and macrophages in the wounds increased. PINP‐stained fibroblasts were unaffected. Neovascularization was not affected by smoking or abstinence. Wound inflammation and fibroblast proliferation were attenuated in smokers, suggesting delayed healing. Abstinence from smoking restores inflammation, but does not affect proliferation. These findings suggest a pathophysiologic mechanism for postoperative wound infection and dehiscence in smokers and why smoking cessation appears to reduce wound infection but not dehiscence. 相似文献
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From bed to bench: 7th Joint meeting of European Tissue Repair Society (ETRS) with the Wound Healing Society (WHS) and the 25th Annual Meeting of ETRS in Copenhagen,Denmark
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20.
Noninvasive measurement of reepithelialization and microvascularity of suction‐blister wounds with benchmarking to histology
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Heidi F. Larsen MD Malin G. Ahlström MD Lise M. R. Gjerdrum MD PhD Mette Mogensen MD PhD Khaled Ghathian MSci Henrik Calum MD PhD Anne L. Sørensen MSci Julie L. Forman PhD Mark Vandeven PhD Marian N. Holerca PhD Laurence Du‐Thumm PhD Lars N. Jorgensen MD DMSci Magnus S. Ågren DMSci 《Wound repair and regeneration》2017,25(6):984-993
We explored use of the suction‐blister wound model in the assessment of not only epidermal regeneration but also pain, the microvascular response and bacteriology. The effects of topical zinc sulfate were studied to articulate the methodologies in this double‐blind trial. One epidermal suction blister (10 mm) was induced on each buttock in 30 healthy volunteers (15 females:15 males) and deroofed on day 0. The wounds were randomized to daily treatment with 1.4% zinc sulfate shower gel (n = 20), placebo (n = 20) or control (n = 20). Digital photography coupled with planimetry, transepidermal water loss (TEWL) measurement and optical coherence tomography (OCT) was benchmarked to the gold standard of histology of 60 full‐thickness wound biopsies on day 4. Pain increased after application of the shower gels. Microvessel density, determined from OCT images, increased from day 0 to day 2 in the three groups but increased more with the placebo than with the zinc shower gel (p = 0.003) or the control treatment (p = 0.002) and correlated (rS = 0.313, p = 0.015) with the inflammatory response on day 4, as determined by histology. Coagulase‐negative staphylococci were more common in wounds compared with skin (p = 0.002) and was reduced (p = 0.030) with zinc sulfate treatment. Planimetric analysis of digital wound images was not biased (p = 0.234) compared with histology, and TEWL measurements showed no correlation (rS = 0.052, p = 0.691) with epithelialization. Neoepidermal formation, determined by histology, did not differ (p = 0.290) among the groups. Zinc sulfate reduced (p = 0.031) the release of lactate dehydrogenase from cultured gel‐treated keratinocytes isolated from the blister roofs. Therefore, combination of the standardized suction‐blister wound model with noninvasive planimetry and OCT is a useful tool for assessing wound therapies. Zinc sulfate transiently dampened inflammation and reduced bacterial growth. 相似文献