Maria Siemionow

Cleveland Clinic, Cleveland, OH, United States

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Publications (264)525.19 Total impact

  • Plastic and reconstructive surgery. 10/2014; 134(4S-1 Suppl):67-68.
  • Plastic and reconstructive surgery 04/2014; 133(4 Suppl):994. · 2.74 Impact Factor
  • Wojciech Konczalik, Maria Siemionow
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    ABSTRACT: Management of soft tissue deficits resulting from congenital abnormalities, trauma, systemic disease, and tumors is a particularly challenging field of plastic and reconstructive surgery. Fat grafting, a technique traditionally used in the correction of facial asymmetry, is commonly seen in aesthetic procedures which use the grafted fat for soft tissue augmentation and recontouring. Despite its widespread use in reconstruction and aesthetic surgery, therapeutic modalities applied in fat grafting are crude and the results of this intervention are unpredictable. The aim of this review was to present the most recent evidence regarding experimental studies and designs which confirmed or disproved fat volume expansion or fat maintenance after autologous fat grafting.
    Annals of plastic surgery 04/2014; 72(4):475-83. · 1.29 Impact Factor
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    ABSTRACT: Currently, only a few large animal models, including swine, dog, and nonhuman primate, are described for composite face transplantation studies and the literature lacks reports on the large animal model of composite auricular transplantation. Large animal models offer better understanding of the immunological mechanisms and major histocompatibility complex characterization and, for this reason, are preferred to the small animal models for the assessment of new immunosuppressive tolerance induction protocols. Thus, the aim of this study was to demonstrate feasibility of dissection and exploration of vascular territories of the hemifacial and auricle transplantation models in the sheep cadavers. Ten cadaver sheep heads were studied. The vascular territories of the composite hemifacial flap and composite auricle flap were defined by anatomical dissection. Methylene blue staining and laser-assisted indocyanine green angiography using SPY Elite System were used for vascular territories assessment. The dissection of cadaver sheep heads confirmed that the hemifacial flap and auricle flap can be raised on the same pedicle consisting of the common carotid artery and jugular vein. An adequate vascular network was observed in the flaps after injection of methylene blue dye via the arterial pedicle. Laser-assisted indocyanine green angiography identified vascular territories of the hemifacial and auricular vascular network. We described a new hemifacial and an auricular transplantation models in the sheep cadavers and have confirmed presence of the adequate vascular network as demonstrated by the laser-assisted angiography. This study introduces 2 new large animal models into the armamentarium of vascular composite allotransplantation.
    Annals of plastic surgery 04/2014; 72(4):469-74. · 1.29 Impact Factor
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    ABSTRACT: Venous grafting has been widely used in microsurgical training. Different types of vascular grafts have been described in experimental models. In this study we describe for the first time the Y- and X-shaped vein grafts (YVG, XVG) with accompanying drain-out branches as a new tool for the microsurgical training and free flap applications in rats. Twelve adult male Lewis rats were used in this study. The dissections were performed to determine the average diameter and harvestable length of vein grafts in eight rats. In four rats vein grafts were applied for bridging of the common carotid artery gap, whereas the drain-out branches were used as the arterial source for single and bilateral free groin flap applications. The venous anastomoses of groin flaps were performed in end-to-end fashion to the external jugular vein and its branches. The patency of anastomoses was checked 72 hours after repair. The average length of the harvestable vein branches ranged between 5.2 to 11.8 mm. The average surgery time for repair of the arterial gap with the vein grafts was 40 minutes. The ischemia time for single and bilateral groin flap transfer using YVG and XVG was 30 and 70 minutes, respectively. The patency of the interpositional vein graft was 100%. Flap survival rates were 50%. These vein grafts can be used as an alternative technique for reconstruction of tissue defects that require arterial gap repair with single or multiple free flap applications and also as a new microsurgical training model.
    Journal of Reconstructive Microsurgery 02/2014; · 1.00 Impact Factor
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    ABSTRACT: Vascularized lymph node transfer is of high interest for the treatment of lymphedema. Currently, there are few experimental small animal models of vascularized lymph node transplantation. In this article, our aim was to describe a new vascularized cervical lymph node transplantation model in rats. Ten male Sprague-Dawley rats weighing 200 to 250 g were used in this study. The anatomic features of the neck lymph nodes in rats were explored. Anatomic neck dissections were performed, and lymph node flaps were harvested. The common carotid artery and the jugular vein were used as the vascular pedicles of the lymph node flap. Methylene blue dye was injected into the arterial pedicle. Lymph nodes were identified, and their structure was confirmed by histological evaluation. Laser-assisted indocyanine green angiography was used to confirm perfusion of the lymph node flap. An adequate perfusion was observed in the lymph node flap. The dye disseminated evenly within the lymph nodes, indicating that the flap had a well-established vascular network and an adequate blood supply. Macroscopically, perfusion of 5 to 6 lymph nodes was observed. Histological examination of tissue samples confirmed well-defined lymph nodes. After indocyanine green administration, fluorescence was observed throughout the lymph node flap and within the venous pedicle of the flap. To the best of our knowledge, this is the first report describing vascularized lymph node flap in the head and neck region of a rat. Our lymph node flap preparation technique confirmed the presence of 5 to 6 lymph nodes within the flap. The presented vascularized lymph node flap can be applied to transplantation studies, lymphedema studies, and to studies on immunological mechanism of tolerance and rejection.
    Annals of plastic surgery 12/2013; 71(6):671-674. · 1.29 Impact Factor
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    ABSTRACT: This review aims to present the most recent updates on face and upper-extremity allotransplantation. To date, 27 face and more than 89 upper-extremity allotransplantations have been performed. Both the face and hand transplants restored form, function and patients' social integration. The complications were comparable with solid organs; however, face transplantation, as well as the combination of face and double hand transplantation, presented with significant morbidity and mortality. Evidence of chronic rejection was confirmed in hand transplants, but it has not been reported yet for facial transplantation. Novel immunosuppressive protocols have allowed a decrease in the number and dosages of traditional immunosuppressants. With increased awareness that following face and hand transplantation, the return of function is more important than anatomical restoration of the missing parts, there has been an important shift in the ethical debate weighing the risks and benefits of face and hand allotransplantation. Early results after face and upper extremity transplantation are promising, with 5-year survival rates greater than in solid organ transplants. However, these procedures still need to be closely monitored and the outcome data should be rigorously reported to the central patient registry database to allow continuous surveillance.
    Current opinion in organ transplantation 10/2013; · 3.27 Impact Factor
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    ABSTRACT: Muscle denervation atrophy is a result of lower motor neuron injury, thus an early restitution of muscle stimulation is essential in prevention of atrophic changes. The aim of the study was to evaluate the new application of naturally occurring epineural sheath conduit in repair of the peripheral nerve gap to prevent development of muscle denervation atrophy. Material and methods. We used the model of 20 mm sciatic nerve gap, resulting in denervation atrophy of the gastrocnemius muscle in the diabetic rats (DM type 2, n=42, Zucker Diabetic Fatty strain). We applied the epineural sheath conduit created from the autologous sciatic nerve for gap repair. Muscle atrophy was assessed with the Gastrocnemius Muscle Index (GMI) and microscopic muscle morphometry (mean fiber area) at 6 and 12 postoperative week. Muscle regeneration in the experimental group was compared to the gold-standard technique of autologous nerve grafting for the repair of created nerve gap. Results. The GMI evaluation revealed comparable muscle mass restoration in groups with nerve repair using both epineural sheath and standard autologous nerve grafting (reaching 28 and 35% of contralateral muscle mass at 12 postoperative week, respectively, p=0.1), and significantly better restoration when compared to the negative control group (no repair, 20%, p<0.01). Micromorphometry confirmed significantly larger area of the regenerated muscle fibers in groups with both nerve grafting and epineural sheath conduit repair (reaching for both ca. 42% of the non-operated side), when compared to severe atrophic outcome when no nerve repair was performed (14% of the control fiber area, p<0.0001). The effectiveness of epineural conduit technique in muscle mass restoration was observed between 6 and 12 weeks after nerve repair - when gastrocnemius muscle mass increased by 12%. Conclusions. Peripheral nerve gap repair with naturally occurring epineural sheath conduit is effective in prevention of muscle denervation atrophy. This method is applicable in diabetic model conditions, showing results of regeneration which are comparable to the autologous nerve graft repair.
    Polish Journal of Surgery 07/2013; 85(7):387-94.
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    ABSTRACT: Peripheral nerve surgery performed under unfavorable conditions results in increased scar formation and suboptimal clinical outcomes. Providing the operated nerve with a protective barrier, reduces fibrosis and adhesion formation and may lead to improved outcomes. The ideal coverage material should prevent scar and adhesion formation, and maintain nerve gliding during motion. Nerve protection using autologous tissues has shown good results, but shortcomings include donor site morbidity and limited availability. Various types of methods and materials have been used to protect nerves. There are both advantages and disadvantages associated with the various materials and techniques. In this report we summarize currently used protective materials applied for nerve coverage under various surgical conditions. © 2013 Wiley Periodicals, Inc. Microsurgery, 2013.
    Microsurgery 04/2013; · 1.62 Impact Factor
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    Maria Siemionow, Aleksandra Klimczak
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    ABSTRACT: The preclinical experimental models of vascularized composite allografts (VCAs) have been rapidly developed for the assessment of immunomodulatory protocols for clinical application. Recently, researchers have focused on immunomodulatory protocols which overcome the immunologic barrier between the allogeneic donor and recipient and may lead to tolerance induction. In order to test the feasibility of chimerism induction, experimental VCAs have been performed in different models including rodents, large animals, and nonhuman primates. These models differ in the complexity of transplanted tissue and in their responses to immunomodulatory protocols. In most applications, VCA contains multiple-tissue components; however, each individual component of CTA possesses unique immunologic characteristics that ultimately contribute to the chimerism induction and successful outcome of the VCA. Heterogenic character and complexity of tissue components in different VCA models determine the quality and robustness of donor-specific chimerism. As introduced in experimental studies, variable immunomodulatory options have been studied to achieve tolerance to VCA in rodents and large animal models allowing for widespread application in clinic. In this paper, based on our own experience, we have analyzed the current knowledge of tolerance-inducing strategies via chimerism induction in VCA experimental models in the context of immunomodulatory protocols and VCA complexity and their relevance and applicability to clinical practice.
    Clinical and Developmental Immunology 01/2013; 2013:831410. · 3.06 Impact Factor
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    ABSTRACT: Pulsed acoustic cellular expression (PACE) is a treatment that applies focused acoustic shock waves to promote tissue healing. The aim of this study was to assess the effect of PACE treatment on inflammatory responses in a cremaster muscle ischemia/reperfusion injury model. Seventeen cremaster muscle flaps were evaluated in four groups: nonischemic controls (n = 5), 5-hour ischemia controls (n = 4), preischemic (5-hour) PACE conditioning (n = 4), and postischemic (5-hour) PACE conditioning (n = 4). The expression of proinflammatory cytokines (TNFα, IL-6, IL-1α, IL-1β, GM-CSF) and chemokines (CCL3, CCL4, CXCL4) was assessed using TaqMan® real-time PCR. Expression of ELAM-1, VCAM-1, and ICAM-1 was assessed by immunostaining. Preischemic PACE conditioning upregulated expression of IL-6, CCL3, CCL4, and CXCL4, and downregulated expression of TNFα, GM-CSF, and IL-1α. Postischemic PACE conditioning significantly decreased expression of all evaluated genes. Pre- and postischemic PACE conditioning decreased expression of ELAM-1 and ICAM-1. Results of the study indicate that application of PACE conditioning may have a beneficial effect on the recovery of tissues subjected to the ischemia/reperfusion injury. Postischemic PACE conditioning revealed anti-inflammatory effect as confirmed by decreased expression of inflammatory cytokines, chemokines, and cell adhesion molecules (ELAM-1 and ICAM-1) that are responsible for leukocyte recruitment into ischemic tissues. Hence, PACE therapy may be used effectively in clinical practice as a convenient therapeutic strategy to protect tissues against ischemia/reperfusion related injury after microsurgical procedures of free tissue transfers. © 2012 Wiley Periodicals, Inc. Microsurgery, 2012.
    Microsurgery 11/2012; · 1.62 Impact Factor
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    ABSTRACT: OBJECT: The gold standard for reconstructing large nerve defects, the nerve autograft, results in donor-site morbidity. This detrimental consequence drives the search for alternatives. We used a vein filled with a small piece of fresh muscle to prevent the vein from collapsing and with bone marrow stromal cells (BMSCs) to enhance regeneration. METHODS: In 60 rats, a 15-mm sciatic nerve defect was bridged with a nerve autograft, a vein filled with muscle or a vein filled with muscle and BMSCs. Toe spread and pinprick were used to evaluate motor and sensory function. Compound muscle action potentials (CMAPs) and the gastrocnemius muscle index (GMI) were recorded to assess conduction properties and denervation atrophy. Extensive histology was performed to confirm presence of BMSCs and to evaluate regeneration by staining neural tissue for Schwann cells and neural growth factor. RESULTS: After 12 weeks, all animals responded with toe spread and pinprick reaction; significant differences were found between groups. Six weeks post grafting no difference was found comparing the GMI between the groups. Group I had a significant increase in GMI at 12 weeks compared to group II and group III. The CMAP measurements showed comparable results at 6 weeks post grafting. Twelve weeks after reconstruction, group I had significantly better results compared to group II and group III. Group III showed a tendency to outperform group II at 12 weeks postoperatively. Immunofluorescence analysis showed an increased number of Schwann cells in group III compared to group II. The BMSCs were visible 6 and 12 weeks postoperatively. CONCLUSIONS: This study is a step forward in the search for an alternative to the nerve autograft because it demonstrates the beneficial effect of BMSCs to a conduit. However, our data do not demonstrate sufficient benefit to warrant clinical implementation at this stage.
    Journal of Plastic Reconstructive & Aesthetic Surgery 10/2012; · 1.44 Impact Factor
  • Maria Siemionow, Maria Madajka, Joanna Cwykiel
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    ABSTRACT: The main purpose of cellular therapy application in face transplantation is the continuous need for the development of new strategies that would eliminate the use of toxic immunosuppressive protocols. Cellular therapy in transplantation can significantly benefit allograft survival and shorten healing time. Cells used for a therapeutic purpose are isolated mostly from bone marrow and adipose tissues. They have the ability to proliferate and differentiate in the transplanted tissue and have immunomodulatory activity. Most of the cellular therapies such as T-regulatory, dendritic, and chimeric cells are still in the experimental stage. Molecular characterization of these cells and the mechanism of their participation in allograft acceptance and rejection are not well established and will contribute to the future of modern transplantology.
    Annals of plastic surgery 10/2012; · 1.29 Impact Factor
  • Maria Siemionow
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    ABSTRACT: This article summarizes the current knowledge on the new developing field of reconstructive transplantation. A brief outline of vascularized composite allografts (VCA) such as human hand, face, larynx, and abdominal wall transplants is provided. The clinical applications and indications for these new reconstructive transplantation procedures are outlined. The advantages, disadvantages, and complications and concerns surrounding clinical VCA are discussed. Finally, the impact of reconstructive transplantation on the future of plastic and reconstructive surgery is presented.
    Clinics in plastic surgery 10/2012; 39(4):425-34. · 0.95 Impact Factor
  • Brian Gastman, Risal Djohan, Maria Siemionow
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    ABSTRACT: There is a growing interest in the use of vascularized composite transplantation to reconstruct major facial and craniofacial deformities. This phenomenon is driven both by the success of recent transplantations to functionally and aesthetically restore patients and by an increase in the number of centers entering this challenging field. The authors' new classification system, based on a well-established schema, allows proper documentation of the needs of these patients and enhancement of interinstitutional communication for outcomes reporting.
    Plastic and reconstructive surgery 08/2012; 130(2):419-22. · 2.74 Impact Factor
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    ABSTRACT: Cellular and vascularized bone marrow cells have been used to induce donor-specific chimerism in various models of composite tissue allotransplantation. Although thymus transplantation has been reported in the literature, the effect of thymus transplantation on chimerism levels in vascularized bone containing composite tissue allotransplantation has not been reported. In this study, a new method for composite vascularized sternal bone marrow transplant model is descried that can be applied to augment chimerism after transplantation. A total of seven composite osseomusculocutaneous sternum, ribs, thymus, pectoralis muscles, and skin transplantations were performed in two groups. The first group (n = 5) was designed as an allotransplantation group and the second group (n = 2) was designed as an isotransplantation group. Composite osseomusculocutaneous sternum, ribs, thymus, and pectoralis muscles allografts were harvested on thecommon carotid artery and external jugular vein and a heterotopic transplantation was performed to the inguinal region of the recipient rat. Cyclosporine A monotherapy was administered in order to prevent acute and chronic allograft rejection. Animals sacrificed when any sign of rejection occurred. The longest survival was 156 day post-transplant. Assessment of bone marrow cells within sternum bone component and flow cytometry analysis of donor-specific chimerism in the peripheral blood of recipients were evaluated. Our results showed that thiscomposite allograft carried 7.5 × 10(6) of viable hematopoietic cells within the sternum component. At day 7 post-transplant chimerism was developed in T-cell population and mean level was assessed at 2.65% for RT1(n) /CD4 and at 1.0% for RT1(n) /CD8. In this study, a newosseomusculocutaneous sternum, ribs, thymus, pectoralis muscle, and skin allotransplantation model is reported which can be usedto augment hematopoietic activity for chimerism induction after transplantation. © 2012 Wiley Periodicals, Inc. Microsurgery, 2012.
    Microsurgery 07/2012; · 1.62 Impact Factor
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    ABSTRACT: Autologous fat transplantation is a common technique for soft tissue augmentation in aesthetic and reconstructive surgery; however, the degree of fat graft take can be unpredictable. Hyaluronan has been shown to be a promising cell carrier in adipose tissue engineering. The authors investigate the effect of a hyaluronan hydrogel on fat graft survival, angiogenesis, and volume maintenance in a rat model. Fat was harvested from the groins of 27 rats, processed, and injected beneath the animals' dorsums to form 2 grafts: 1 containing fat alone and 1 containing fat and hyaluronan hydrogel in a 1:1 mix (fat-HA). The grafts were scanned in vivo under high-resolution computed tomography at baseline and prior to euthanasia at 4, 12, and 20 weeks to measure total fat-HA graft volume as well as the volume of the fat component alone. Histological studies were performed after sacrifice to evaluate fat necrosis and blood vessel density. All grafts were clinically viable. Overall, fat necrosis was significantly reduced in the fat-HA grafts compared with the grafts containing fat alone (P < .001). This difference was most profound at 4 weeks (P = .008) but did not reach statistical significance at 12 and 20 weeks. At 12 weeks, blood vessel density in the fat-HA grafts was significantly greater than in the grafts containing fat alone (P = .016), but this did not reach statistical significance at 4 or 20 weeks. At 20 weeks, the fat component of the fat-HA graft had significantly less volume loss than the fat-alone graft (P = .008). When mixed with fat, hyaluronan hydrogel can improve early fat graft survival and may enhance vascularity and prolong volume maintenance.
    Aesthetic surgery journal / the American Society for Aesthetic Plastic surgery 07/2012; 32(5):622-33.
  • Microsurgery 03/2012; 32(5):420-2. · 1.62 Impact Factor
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    ABSTRACT: Complexity of logistic issues related to facial transplantation includes donor tissue recovery, recipient preparation, and operative execution. Limited information is available on the intricate process associated with facial allograft procurement in the United States. The face transplant teams at the Cleveland Clinic and Brigham and Women's Hospital have combined their experiences regarding collaboration with organ procurement organizations and institutional review boards, and outlined technical and logistic challenges encountered during the process of facial allograft procurement and compared them with those of solid organ procurement. In a collaborative effort, both programs have created comprehensive guidelines for all aspects involved in donor facial allograft procurement. The authors suggest that every face transplant team should develop a thorough understanding of the local and regional legislative issues related to organ and tissue donation and ethical concerns surrounding this procedure. The recovery plan has to be communicated extensively among all members of the team. The Cleveland and Boston teams hope their experiences may help other teams in the process of building new face transplant programs. Therapeutic, V.
    Plastic and reconstructive surgery 03/2012; 129(3):461e-467e. · 2.74 Impact Factor
  • Source
    American Journal of Transplantation 01/2012; 12(4):1062-3. · 6.19 Impact Factor

Publication Stats

3k Citations
525.19 Total Impact Points


  • 2000–2013
    • Cleveland Clinic
      • Department of Plastic Surgery
      Cleveland, OH, United States
  • 2012
    • Brigham and Women's Hospital
      • Department of Medicine
      Boston, MA, United States
  • 2008–2012
    • Kirikkale University
      • Department of Plastic and Reconstructive Surgery
      Кырыккале, Kırıkkale, Turkey
  • 2011
    • Partners HealthCare
      Boston, Massachusetts, United States
    • Massachusetts General Hospital
      • Division of Plastic and Reconstructive Surgery
      Boston, MA, United States
  • 2009–2011
    • Nicolaus Copernicus University
      • Department of Anesthesiology and Intensive Care
      Toruń, Kujawsko-Pomorskie, Poland
  • 1999–2010
    • Gulhane Military Medical Academy
      • Department of Plastic and Reconstructive Surgery
      Engüri, Ankara, Turkey
    • Salt Lake City Community College
      Salt Lake City, Utah, United States
    • Blood Systems Research Institute
      San Francisco, California, United States
    • Vitos Orthopädische Klinik Kassel
      Cassel, Hesse, Germany
  • 2007–2009
    • American Society of Ophthalmic Plastic and Reconstructive Surgery
      Cleveland, Ohio, United States
  • 1994–2009
    • Gazi University
      • Faculty of Medicine
      Ankara, Ankara, Turkey
  • 2002
    • Ankara Numune Training and Research Hospital
      Engüri, Ankara, Turkey
    • Marmara University
      • Department of Orthopaedics and Traumatology
      İstanbul, Istanbul, Turkey
  • 1999–2001
    • Universität zu Lübeck
      Lübeck Hansestadt, Schleswig-Holstein, Germany
  • 1993–1998
    • University of Utah
      • • Division of Plastic Surgery
      • • Department of Internal Medicine
      Salt Lake City, UT, United States
  • 1996
    • Haydarpasa Numune Research and Teaching Hospital
      İstanbul, Istanbul, Turkey