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Pucher S, Klüsener V, Spriestersbach F, Geiger J, Schindewolf A, Bloch I, Blatt S. Fine-Structure Qubit Encoded in Metastable Strontium Trapped in an Optical Lattice. Phys Rev Lett 2024; 132:150605. [PMID: 38682987 DOI: 10.1103/physrevlett.132.150605] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Accepted: 03/11/2024] [Indexed: 05/01/2024]
Abstract
We demonstrate coherent control of the fine-structure qubit in neutral strontium atoms. This qubit is encoded in the metastable ^{3}P_{2} and ^{3}P_{0} states, coupled by a Raman transition. Using a magnetic quadrupole transition, we demonstrate coherent state initialization of this THz qubit. We show Rabi oscillations with more than 60 coherent cycles and single-qubit rotations on the μs scale. With spin echo, we demonstrate coherence times of tens of ms. Our results pave the way for fast quantum information processors and highly tunable quantum simulators with two-electron atoms.
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Affiliation(s)
- S Pucher
- Max-Planck-Institut für Quantenoptik, 85748 Garching, Germany
- Munich Center for Quantum Science and Technology, 80799 München, Germany
| | - V Klüsener
- Max-Planck-Institut für Quantenoptik, 85748 Garching, Germany
- Munich Center for Quantum Science and Technology, 80799 München, Germany
| | - F Spriestersbach
- Max-Planck-Institut für Quantenoptik, 85748 Garching, Germany
- Munich Center for Quantum Science and Technology, 80799 München, Germany
| | - J Geiger
- Max-Planck-Institut für Quantenoptik, 85748 Garching, Germany
- Munich Center for Quantum Science and Technology, 80799 München, Germany
| | - A Schindewolf
- Max-Planck-Institut für Quantenoptik, 85748 Garching, Germany
- Munich Center for Quantum Science and Technology, 80799 München, Germany
- Fakultät für Physik, Ludwig-Maximilians-Universität München, 80799 München, Germany
| | - I Bloch
- Max-Planck-Institut für Quantenoptik, 85748 Garching, Germany
- Munich Center for Quantum Science and Technology, 80799 München, Germany
- Fakultät für Physik, Ludwig-Maximilians-Universität München, 80799 München, Germany
| | - S Blatt
- Max-Planck-Institut für Quantenoptik, 85748 Garching, Germany
- Munich Center for Quantum Science and Technology, 80799 München, Germany
- Fakultät für Physik, Ludwig-Maximilians-Universität München, 80799 München, Germany
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Grandjean T, Perumal N, Manicam C, Matthey B, Wu T, Thiem DGE, Stein S, Henrich D, Kämmerer PW, Al-Nawas B, Ritz U, Blatt S. Towards optimized tissue regeneration: a new 3D printable bioink of alginate/cellulose hydrogel loaded with thrombocyte concentrate. Front Bioeng Biotechnol 2024; 12:1363380. [PMID: 38595995 PMCID: PMC11002213 DOI: 10.3389/fbioe.2024.1363380] [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] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2023] [Accepted: 03/06/2024] [Indexed: 04/11/2024] Open
Abstract
Introduction Autologous platelet concentrate (APC) are pro-angiogenic and can promote wound healing and tissue repair, also in combination with other biomaterials. However, challenging defect situations remain demanding. 3D bioprinting of an APC based bioink encapsulated in a hydrogel could overcome this limitation with enhanced physio-mechanical interface, growth factor retention/secretion and defect-personalized shape to ultimately enhance regeneration. Methods This study used extrusion-based bioprinting to create a novel bioink of alginate/cellulose hydrogel loaded with thrombocyte concentrate. Chemico-physical testing exhibited an amorphous structure characterized by high shape fidelity. Cytotoxicity assay and incubation of human osteogenic sarcoma cells (SaOs2) exposed excellent biocompatibility. enzyme-linked immunosorbent assay analysis confirmed pro-angiogenic growth factor release of the printed constructs, and co-incubation with HUVECS displayed proper cell viability and proliferation. Chorioallantoic membrane (CAM) assay explored the pro-angiogenic potential of the prints in vivo. Detailed proteome and secretome analysis revealed a substantial amount and homologous presence of pro-angiogenic proteins in the 3D construct. Results This study demonstrated a 3D bioprinting approach to fabricate a novel bioink of alginate/cellulose hydrogel loaded with thrombocyte concentrate with high shape fidelity, biocompatibility, and substantial pro-angiogenic properties. Conclusion This approach may be suitable for challenging physiological and anatomical defect situations when translated into clinical use.
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Affiliation(s)
- Till Grandjean
- Department of Orthopedics and Traumatology, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Natarajan Perumal
- Department of Ophthalmology, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Caroline Manicam
- Department of Ophthalmology, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Björn Matthey
- Fraunhofer Institute for Ceramic Technologies and Systems (Fraunhofer IKTS), Dresden, Germany
| | - Tao Wu
- Fraunhofer Institute for Ceramic Technologies and Systems (Fraunhofer IKTS), Dresden, Germany
| | - Daniel G. E. Thiem
- Department of Oral and Maxillofacial Surgery, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Stefan Stein
- Georg-Speyer-Haus, Institute for Tumor Biology and Experimental Therapy, Frankfurt am Main, Germany
| | - Dirk Henrich
- Department of Trauma, Hand and Reconstructive Surgery, University Hospital, Goethe University Frankfurt, Frankfurt am Main, Germany
| | - Peer W. Kämmerer
- Department of Oral and Maxillofacial Surgery, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Bilal Al-Nawas
- Department of Oral and Maxillofacial Surgery, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Ulrike Ritz
- Department of Orthopedics and Traumatology, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
- Platform for Biomaterial Research, BiomaTiCS Group, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Sebastian Blatt
- Department of Oral and Maxillofacial Surgery, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
- Platform for Biomaterial Research, BiomaTiCS Group, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
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Thiem DGE, Siegberg F, Vinayahalingam S, Blatt S, Krüger M, Lethaus B, Al-Nawas B, Zimmerer R, Kämmerer PW. The Perfect Timing-Immediate versus Delayed Microvascular Reconstruction of the Mandible. Cancers (Basel) 2024; 16:974. [PMID: 38473338 DOI: 10.3390/cancers16050974] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Revised: 02/18/2024] [Accepted: 02/23/2024] [Indexed: 03/14/2024] Open
Abstract
In this retrospective study, the clinical and economic implications of microvascular reconstruction of the mandible were assessed, comparing immediate versus delayed surgical approaches. Utilizing data from two German university departments for oral and maxillofacial surgery, the study included patients who underwent mandibular reconstruction following continuity resection. The data assessed included demographic information, reconstruction details, medical history, dental rehabilitation status, and flap survival rates. In total, 177 cases (131 male and 46 females; mean age: 59 years) of bony free flap reconstruction (72 immediate and 105 delayed) were included. Most patients received adjuvant treatment (81% with radiotherapy and 51% combined radiochemotherapy), primarily for tumor resection. Flap survival was not significantly influenced by the timing of reconstruction, radiotherapy status, or the mean interval (14.5 months) between resection and reconstruction. However, immediate reconstruction had consumed significantly fewer resources. The rate of implant-supported masticatory rehabilitation was only 18% overall. This study suggests that immediate jaw reconstruction is economically advantageous without impacting flap survival rates. It emphasizes patient welfare as paramount over financial aspects in clinical decisions. Furthermore, this study highlights the need for improved pathways for masticatory rehabilitation, as evidenced by only 18% of patients with implant-supported dentures, to enhance quality of life and social integration.
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Affiliation(s)
- Daniel G E Thiem
- Department of Oral and Maxillofacial Surgery, Facial Plastic Surgery, University Medical Centre Mainz, Augustusplatz 2, 55131 Mainz, Germany
| | - Fabia Siegberg
- Department of Oral and Maxillofacial Surgery, Facial Plastic Surgery, University Medical Centre Mainz, Augustusplatz 2, 55131 Mainz, Germany
| | - Shankeeth Vinayahalingam
- Department of Oral and Maxillofacial Surgery, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands
| | - Sebastian Blatt
- Department of Oral and Maxillofacial Surgery, Facial Plastic Surgery, University Medical Centre Mainz, Augustusplatz 2, 55131 Mainz, Germany
| | - Maximilian Krüger
- Department of Oral and Maxillofacial Surgery, Facial Plastic Surgery, University Medical Centre Mainz, Augustusplatz 2, 55131 Mainz, Germany
| | - Bernd Lethaus
- Department of Oral and Maxillofacial Surgery, Facial Plastic Surgery, University Medical Centre Tübingen, Osianderstr. 2-8, 72076 Tübingen, Germany
| | - Bilal Al-Nawas
- Department of Oral and Maxillofacial Surgery, Facial Plastic Surgery, University Medical Centre Mainz, Augustusplatz 2, 55131 Mainz, Germany
| | - Rüdiger Zimmerer
- Department of Oral and Maxillofacial Surgery, Facial Plastic Surgery, University Medical Centre Tübingen, Osianderstr. 2-8, 72076 Tübingen, Germany
- Department of Oral and Maxillofacial Surgery, Facial Plastic Surgery, University Medical Centre Leipzig, Liebigstraße 12, 04103 Leipzig, Germany
| | - Peer W Kämmerer
- Department of Oral and Maxillofacial Surgery, Facial Plastic Surgery, University Medical Centre Mainz, Augustusplatz 2, 55131 Mainz, Germany
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Schröger SV, Blatt S, Sagheb K, Al-Nawas B, Kämmerer PW, Sagheb K. Platelet-rich fibrin for rehydration and pre-vascularization of an acellular, collagen membrane of porcine origin. Clin Oral Investig 2024; 28:99. [PMID: 38227215 PMCID: PMC10791820 DOI: 10.1007/s00784-023-05485-2] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Accepted: 12/29/2023] [Indexed: 01/17/2024]
Abstract
OBJECTIVES Pre-vascularization of the collagen membranes with autologous platelet concentrates is a standard procedure in oral and maxillofacial surgery. This study analyzed the possible interaction of an acellular collagen membrane of porcine origin (NM) with platelet-rich fibrin (PRF) regarding its rehydration protocol with differences in pH values and effect on angiogenesis. MATERIALS AND METHODS NM was analyzed alone and combined with solid PRF by plotting or co-culturing with injectable PRF. Different media (venous blood, buffer solution with a fixed pH value of 7, saline solution, and injectable PRF) were used to analyze the influence on pH value during rehydration. Chorion allantois membrane assay (CAM) was applied to check pro-angiogenic effects after 24, 48, and 72 h, followed by immunohistochemical analysis. RESULTS Rehydration in injectable PRF showed acidity over time (p < 0.05). A definite pro-angiogenic effect of NM alone was found regarding neo-vessel formation supported by the respective light microscopically analysis without significant differences to PRF alone (p > 0.005). This pro-angiogenic effect could not be exaggerated when NM was combined with liquid/solid PRF (each p > 0.005). CONCLUSIONS Rehydration with liquid PRF of the collagen membrane results in acidity compared to a saline solution or patient's blood. The significant pro-angiogenic potential of the membrane alone resulted in enhanced neo-vessel formation that could not be optimized with the addition of PRF. CLINICAL RELEVANCE STATEMENT Using injectable PRF for rehydration protocol of the collagen membrane leads to acidosis that can ultimately optimize wound healing. Differences in the physio-mechanical interplay of collagen matrices and autologous platelet concentrates must result in clinical algorithms if pre-vascularization can maximize outcomes.
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Affiliation(s)
- Saskia-Vanessa Schröger
- Department of Oral and Maxillofacial Surgery-Plastic Operations, University Medical Center Mainz, Augustusplatz 2, 55131, Mainz, Germany.
| | - Sebastian Blatt
- Department of Oral and Maxillofacial Surgery-Plastic Operations, University Medical Center Mainz, Augustusplatz 2, 55131, Mainz, Germany
| | - Kawe Sagheb
- Department of Prosthodontics University Medical Center Mainz, Mainz, Germany
| | - Bilal Al-Nawas
- Department of Oral and Maxillofacial Surgery-Plastic Operations, University Medical Center Mainz, Augustusplatz 2, 55131, Mainz, Germany
| | - Peer W Kämmerer
- Department of Oral and Maxillofacial Surgery-Plastic Operations, University Medical Center Mainz, Augustusplatz 2, 55131, Mainz, Germany
| | - Keyvan Sagheb
- Department of Oral and Maxillofacial Surgery-Plastic Operations, University Medical Center Mainz, Augustusplatz 2, 55131, Mainz, Germany
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Stephan D, Blatt S, Riedel J, Mohnke K, Ruemmler R, Ziebart A, Al-Nawas B, Kämmerer PW, Thiem DGE. The Impact of Transfer-Related Ischemia on Free Flap Metabolism and Electrolyte Homeostasis-A New In Vivo Experimental Approach in Pigs. J Clin Med 2023; 12:6625. [PMID: 37892763 PMCID: PMC10607031 DOI: 10.3390/jcm12206625] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2023] [Revised: 10/12/2023] [Accepted: 10/16/2023] [Indexed: 10/29/2023] Open
Abstract
Free flap tissue transfer represents the gold standard for extensive defect reconstruction, although malperfusion due to thrombosis remains the leading risk factor for flap failure. Recent studies indicate an increased immune response and platelet activation in connection with pathologic coagulation. The underlying cellular and molecular mechanisms remain poorly understood, however. The presented study, therefore, aims to investigate if transfer-related ischemia alters intra-flap metabolism and electrolyte concentrations compared to central venous blood after free flap transfer in pigs to establish a novel experimental model. Free transfer of a myocutaneous gracilis flap to the axillary region was conducted in five juvenile male pigs. The flap artery was anastomosed to the axillary artery, and intra-flap venous blood was drained and transfused using a rubber-elastic fixed intravenous catheter. Blood gas analysis was performed to assess the effect of transfer time-induced ischemia on intra-flap electrolyte levels, acid-base balance, and hemoglobin concentrations compared to central venous blood. Time to flap reperfusion was 52 ± 10 min on average, resulting in a continuous pH drop (acidosis) in the flaps' venous blood compared to the central venous system (p = 0.037). Potassium (p = 0.016), sodium (p = 0.003), and chloride (p = 0.007) concentrations were significantly increased, whereas bicarbonate (p = 0.016) and calcium (p = 0.008) significantly decreased within the flap. These observations demonstrate the induction of anaerobic glycolysis and electrolyte displacement resulting in acidosis and hence significant tissue damage already after a short ischemic period, thereby validating the novel animal model for investigating intra-flap metabolism and offering opportunities for exploring various (immuno-) thrombo-hemostatic issues in transplantation surgery.
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Affiliation(s)
- Daniel Stephan
- Department of Oral and Maxillofacial Surgery, Facial Plastic Surgery, University Medical Centre, Johannes Gutenberg University Mainz, Augustusplatz 2, 55131 Mainz, Germany; (S.B.); (B.A.-N.); (P.W.K.); (D.G.E.T.)
| | - Sebastian Blatt
- Department of Oral and Maxillofacial Surgery, Facial Plastic Surgery, University Medical Centre, Johannes Gutenberg University Mainz, Augustusplatz 2, 55131 Mainz, Germany; (S.B.); (B.A.-N.); (P.W.K.); (D.G.E.T.)
| | - Julian Riedel
- Department of Anaesthesiology, University Medical Centre, Johannes Gutenberg University Mainz, Langenbeckstraße 1, 55131 Mainz, Germany; (J.R.); (K.M.); (R.R.); (A.Z.)
| | - Katja Mohnke
- Department of Anaesthesiology, University Medical Centre, Johannes Gutenberg University Mainz, Langenbeckstraße 1, 55131 Mainz, Germany; (J.R.); (K.M.); (R.R.); (A.Z.)
| | - Robert Ruemmler
- Department of Anaesthesiology, University Medical Centre, Johannes Gutenberg University Mainz, Langenbeckstraße 1, 55131 Mainz, Germany; (J.R.); (K.M.); (R.R.); (A.Z.)
| | - Alexander Ziebart
- Department of Anaesthesiology, University Medical Centre, Johannes Gutenberg University Mainz, Langenbeckstraße 1, 55131 Mainz, Germany; (J.R.); (K.M.); (R.R.); (A.Z.)
| | - Bilal Al-Nawas
- Department of Oral and Maxillofacial Surgery, Facial Plastic Surgery, University Medical Centre, Johannes Gutenberg University Mainz, Augustusplatz 2, 55131 Mainz, Germany; (S.B.); (B.A.-N.); (P.W.K.); (D.G.E.T.)
| | - Peer W. Kämmerer
- Department of Oral and Maxillofacial Surgery, Facial Plastic Surgery, University Medical Centre, Johannes Gutenberg University Mainz, Augustusplatz 2, 55131 Mainz, Germany; (S.B.); (B.A.-N.); (P.W.K.); (D.G.E.T.)
| | - Daniel G. E. Thiem
- Department of Oral and Maxillofacial Surgery, Facial Plastic Surgery, University Medical Centre, Johannes Gutenberg University Mainz, Augustusplatz 2, 55131 Mainz, Germany; (S.B.); (B.A.-N.); (P.W.K.); (D.G.E.T.)
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Walter C, Sagheb K, Blatt S, Klein MO, Herrmann J, Kleinheinz J, Al-Nawas B. Evaluation of the clinical safety and performance of a narrow diameter (2.9 mm) bone-level implant: a 1-year prospective single-arm multicenter study. Int J Implant Dent 2023; 9:32. [PMID: 37725234 PMCID: PMC10509112 DOI: 10.1186/s40729-023-00495-x] [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: 04/13/2023] [Accepted: 08/29/2023] [Indexed: 09/21/2023] Open
Abstract
PURPOSE Narrow-diameter implants facilitate single-tooth restoration when interdental or inter-implant spaces and bone volume are inadequate for using standard diameter implants. This study reports the short-term data on the clinical safety and performance of a bone-level-tapered two-piece implant with a 2.9 mm diameter in the clinical practice setting. This study was retrospectively registered on March 1st, 2016 (NCT02699866). METHODS Implants were placed in partially healed extraction sockets of the central and lateral incisors in the mandible and lateral incisors in the maxilla for single-tooth replacement. The primary outcome was to assess implant survival at 12 months after placement. Secondary outcomes included implant success, pink esthetic score, marginal bone-level changes, and safety. RESULTS Twenty four males and 17 females with a mean age of 44.5 (± 18.3 standard deviation) received the implant. Three out of 41 implants were lost yielding a survival rate of 92.7% (95%-CI: 79.0%; 97.6%) at 1 year. One patient reported an ongoing foreign body sensation, pain, and/or dysesthesia at month 12. The average pink esthetic score at 6 months was 11.2 (95%-CI: 10.5; 11.9). The bone level was stable with a mean bone-level change of-0.3 mm (± 0.42 mm standard deviation) at 1 year after implantation. No serious adverse events or adverse device events were reported. CONCLUSIONS The use of a 2.9 mm diameter bone-level-tapered implant is a safe and reliable treatment option for narrow tooth gaps at the indicated locations. Overall performance and good survival rates support their use in cases, where wider implants are unsuitable.
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Affiliation(s)
- Christian Walter
- Oral and Maxillofacial Surgery of the Mediplus Clinic, Haifa-Allee 20, 55128, Mainz, Germany.
- Oral and Maxillofacial Surgery, University Medical Center of the Johannes Gutenberg University, Mainz, Germany.
| | - Keyvan Sagheb
- Oral and Maxillofacial Surgery, University Medical Center of the Johannes Gutenberg University, Mainz, Germany
| | - Sebastian Blatt
- Oral and Maxillofacial Surgery, University Medical Center of the Johannes Gutenberg University, Mainz, Germany
| | - Marcus Oliver Klein
- Oral and Maxillofacial Surgery Private Dental Office, Stresemannstraße 7-9, 40210, Düsseldorf, Germany
| | - Jan Herrmann
- Oral and Maxillofacial Surgery Private Dental Office, Lothar-Streit-Straße 10B, 08056, Zwickau, Germany
| | - Johannes Kleinheinz
- Department of Cranio-Maxillofacial Surgery, University Hospital Münster, Albert Schweitzer-Campus 1, 48149, Münster, Germany
| | - Bilal Al-Nawas
- Oral and Maxillofacial Surgery, University Medical Center of the Johannes Gutenberg University, Mainz, Germany
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Gielisch MW, Siegberg F, Thiem DGE, Blatt S, Heimes D, Kämmerer PW. A novel alloplastic grid reconstruction plate for the mandible - Retrospective comparative clinical analysis of failure rates and specific complications. J Craniomaxillofac Surg 2023; 51:448-453. [PMID: 37550114 DOI: 10.1016/j.jcms.2023.07.005] [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: 03/26/2023] [Revised: 05/25/2023] [Accepted: 07/30/2023] [Indexed: 08/09/2023] Open
Abstract
PURPOSE This study aimed to investigate the effect of three different osteosynthesis plate systems on failure rates and complications after continuity-interrupting mandibular resections with alloplastic reconstructions. MATERIALS AND METHODS Records of respective patients from 2010 to 2020 were analyzed retrospectively. The analyses included the osteosynthesis plate type (2.4 MANDIBULAR (RP1: MANDIBULAR [Medicon®, Tuttlingen, Germany]; RP2: Modus® Reco 2.5 [Medartis®, Basel, Switzerland]; and RP3: Modus 2 Mandible [Medartis®, Basel, Switzerland]), extent & location of the defect, age, sex, radiotherapy, and nicotine abuse. In case of failure, timepoint, and the problem, namely oral/extraoral dehiscence, screw loosening, and plate fractures that led to removal, were analyzed. Complications were classified according to Clavien-Dindo system. RESULTS A total of 136 patients were included. The mean follow-up time was 18 ± 26 months. Survival rates after 1, 2, and 5 years were 69.9%, 66.9%, and 64.7%, respectively. Although survival was not significantly associated with the reconstruction system, the most frequent complications were seen in cases of RP1 & RP2 when compared to RP3 (p = 0.033). In brief, dehiscences were seen significantly less often in cases of RP3 (12.5%) when compared to RP1 (44.7%) and RP2 (26.9%; p = 0.024). Fractures of the osteosynthesis systems occurred in 3 of 4 cases (75%) with RP1, in 1 of 4 cases (25%) using RP2, and in no single case using the RP3 system (p = 0.03). Most of the observed complications occurred up to 12 months postoperatively. A total plate survival rate of 64.7% and a total plate complication rate of 47.8% were seen. CONCLUSION In conclusion, it seems that RP3 should be preferred over RP1 and RP2 regarding failure rates and complications.
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Affiliation(s)
- Matthias W Gielisch
- Department of Oral and Maxillofacial Surgery - Plastic Operations, University Medical Center Mainz, Augustusplatz 2, 55131, Mainz, Germany
| | - Fabia Siegberg
- Department of Oral and Maxillofacial Surgery - Plastic Operations, University Medical Center Mainz, Augustusplatz 2, 55131, Mainz, Germany
| | - Daniel G E Thiem
- Department of Oral and Maxillofacial Surgery - Plastic Operations, University Medical Center Mainz, Augustusplatz 2, 55131, Mainz, Germany
| | - Sebastian Blatt
- Department of Oral and Maxillofacial Surgery - Plastic Operations, University Medical Center Mainz, Augustusplatz 2, 55131, Mainz, Germany
| | - Diana Heimes
- Department of Oral and Maxillofacial Surgery - Plastic Operations, University Medical Center Mainz, Augustusplatz 2, 55131, Mainz, Germany
| | - Peer W Kämmerer
- Department of Oral and Maxillofacial Surgery - Plastic Operations, University Medical Center Mainz, Augustusplatz 2, 55131, Mainz, Germany.
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Blatt S, Kämmerer PW, Krüger M, Surabattula R, Thiem DGE, Dillon ST, Al-Nawas B, Libermann TA, Schuppan D. High-Multiplex Aptamer-Based Serum Proteomics to Identify Candidate Serum Biomarkers of Oral Squamous Cell Carcinoma. Cancers (Basel) 2023; 15:cancers15072071. [PMID: 37046731 PMCID: PMC10093013 DOI: 10.3390/cancers15072071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2023] [Revised: 03/17/2023] [Accepted: 03/29/2023] [Indexed: 04/03/2023] Open
Abstract
Improved serological biomarkers are needed for the early detection, risk stratification and treatment surveillance of patients with oral squamous cell carcinoma (OSCC). We performed an exploratory study using advanced, highly specific, DNA-aptamer-based serum proteomics (SOMAscan, 1305-plex) to identify distinct proteomic changes in patients with OSCC pre- vs. post-resection and compared to healthy controls. A total of 63 significantly differentially expressed serum proteins (each p < 0.05) were found that could discriminate between OSCC and healthy controls with 100% accuracy. Furthermore, 121 proteins were detected that were significantly altered between pre- and post-resection sera, and 12 OSCC-associated proteins reversed to levels equivalent to healthy controls after resection. Of these, 6 were increased and 6 were decreased relative to healthy controls, highlighting the potential relevance of these proteins as OSCC tumor markers. Pathway analyses revealed potential pathophysiological mechanisms associated with OSCC. Hence, quantitative proteome analysis using SOMAscan technology is promising and may aid in the development of defined serum marker assays to predict tumor occurrence, progression and recurrence in OSCC, and to guide personalized therapies.
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Trzeciak ER, Zimmer N, Kämmerer PW, Thiem D, Al-Nawas B, Tuettenberg A, Blatt S. GARP Regulates the Immune Capacity of a Human Autologous Platelet Concentrate. Biomedicines 2022; 10:biomedicines10123136. [PMID: 36551892 PMCID: PMC9775012 DOI: 10.3390/biomedicines10123136] [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] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 11/26/2022] [Accepted: 11/29/2022] [Indexed: 12/12/2022] Open
Abstract
Autologous platelet concentrates, like liquid platelet rich fibrin (iPRF), optimize wound healing; however, the underlying immunological mechanisms are poorly understood. Platelets, the main cellular component of iPRF, highly express the protein, Glycoprotein A repetitions predominant (GARP), on their surfaces. GARP plays a crucial role in maintaining peripheral tolerance, but its influence on the immune capacity of iPRF remains unclear. This study analyzed the interaction of iPRF with immune cells implicated in the wound healing process (human monocyte derived macrophages and CD4+ T cells) and evaluated the distinct influence of GARP on these mechanisms in vitro. GARP was determined to be expressed on the surface of platelets and to exist as a soluble factor in iPRF. Platelets derived from iPRF and iPRF itself induced a regulatory phenotype in CD4+ T cells, shown by increased expression of Foxp3 and GARP as well as decreased production of IL-2 and IFN-γ. Application of an anti-GARP antibody reversed these effects. Additionally, iPRF polarized macrophages to a "M0/M2-like" phenotype in a GARP independent manner. Altogether, this study demonstrated for the first time that the immune capacity of iPRF is mediated in part by GARP and its ability to induce regulatory CD4+ T cells.
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Affiliation(s)
- Emily R. Trzeciak
- Department of Dermatology, University Medical Center Mainz, Johannes Gutenberg University Mainz, 55131 Mainz, Rhineland-Palatinate, Germany
| | - Niklas Zimmer
- Department of Dermatology, University Medical Center Mainz, Johannes Gutenberg University Mainz, 55131 Mainz, Rhineland-Palatinate, Germany
| | - Peer W. Kämmerer
- Department of Oral and Maxillofacial Surgery, University Medical Center Mainz, Johannes Gutenberg University Mainz, 55131 Mainz, Rhineland-Palatinate, Germany
| | - Daniel Thiem
- Department of Oral and Maxillofacial Surgery, University Medical Center Mainz, Johannes Gutenberg University Mainz, 55131 Mainz, Rhineland-Palatinate, Germany
| | - Bilal Al-Nawas
- Department of Oral and Maxillofacial Surgery, University Medical Center Mainz, Johannes Gutenberg University Mainz, 55131 Mainz, Rhineland-Palatinate, Germany
| | - Andrea Tuettenberg
- Department of Dermatology, University Medical Center Mainz, Johannes Gutenberg University Mainz, 55131 Mainz, Rhineland-Palatinate, Germany
- Research Center for Immunotherapy, University Medical Center Mainz, Johannes Gutenberg University Mainz, 55131 Mainz, Rhineland-Palatinate, Germany
| | - Sebastian Blatt
- Department of Oral and Maxillofacial Surgery, University Medical Center Mainz, Johannes Gutenberg University Mainz, 55131 Mainz, Rhineland-Palatinate, Germany
- Platform for Biomaterial Research, BiomaTiCS Group, University Medical Center Mainz, Johannes Gutenberg University Mainz, 55131 Mainz, Rhineland-Palatinate, Germany
- Correspondence:
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Sagheb K, Blatt S, Rahimi-Nedjat RK, Lingawi A, Schiegnitz E, Kumar VV, Walter C, Sagheb K. Oral Squamous Cell Carcinomas Developing from Oral Lichen Planus: A 5-21 year Retrospective Study. J Maxillofac Oral Surg 2022; 21:1088-1095. [PMID: 36891504 PMCID: PMC9989091 DOI: 10.1007/s12663-022-01729-y] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2021] [Accepted: 04/25/2022] [Indexed: 11/24/2022] Open
Abstract
Background and Aims There is insufficient data regarding clinical characteristics, relapse rates, as well as lymph node metastasis of squamous cell carcinomas of the oral cavity (OSCC) developing from oral lichen planus (OLP-OSCC). The aim of this retrospective study was to evaluate clinical characteristics, as well as relapse, recurrence and survival rates of OLP-OSCC. Methods In a retrospective monocenter analysis, all consecutive patients with an OSCC treated in the time period 1st January 2000-December 31 2016 were reviewed. All patients with OSCC developing from OLP/OLL (oral lichenoid lesions) were identified and analyzed for epidemiological data, risk profile, location of primary tumor, pTNM classification, lymph node metastasis, primary therapy, recurrence, and outcome. Results A total of 103 patients (45%♂/ 55%♀) with an average age of 62 ± 14 year were included in this study. At the time of initial diagnosis, 17% (n = 18) of patients had cervical metastases (CM) whereas only 11% (11 patients) displayed advanced tumor sizes (T > 2). T-status (p = 0.003) and histopathological grading (p = 0.001) had an impact on the incidence of CM. 39.6% of the patients developed a relapse after an average of 24 months with a mean of two recurrences per patient. Advanced tumor size had a significant impact on the 5 year overall survival and was associated with disease-free survival of the patients (p < 0.001, respectively p = 0.004). Conclusion Although initial lymph node metastases were not more frequent, more aggressive recurrence patterns compared to OSCC were seen for OLP-OSCC. Therefore, based on the study results, a modified recall for these patients is suggested.
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Affiliation(s)
- Kawe Sagheb
- Department of Prosthetic Dentistry, University Medical Center of the Johannes Gutenberg-University Mainz, Augustusplatz 2, 55131 Mainz, Germany
| | - Sebastian Blatt
- Department of Oral and Maxillofacial Surgery - Plastic Surgery, University Medical Center of the Johannes Gutenberg-University Mainz, Augustusplatz 2, 55131 Mainz, Germany
| | - Roman-Kia Rahimi-Nedjat
- Department of Oral and Maxillofacial Surgery - Plastic Surgery, University Medical Center of the Johannes Gutenberg-University Mainz, Augustusplatz 2, 55131 Mainz, Germany
| | - Abdullatif Lingawi
- Clinic for Psychiatry, Psychotherapy and Psychosomatic, St. Valentinus Hospital, Suttonstraße 24, 65399 Kiedrich, Germany
| | - Eik Schiegnitz
- Department of Oral and Maxillofacial Surgery - Plastic Surgery, University Medical Center of the Johannes Gutenberg-University Mainz, Augustusplatz 2, 55131 Mainz, Germany
| | - Vinay V Kumar
- Department of Oral and Maxillofacial Surgery - Integrated Head and Neck Surgery, Sri Shankara Cancer Hospital and Research Center, Basavangudi, Bangalore, 560004 India.,Department of Plastic and Maxillofacial Surgery, Uppsala University Hospital, Uppsala, Sweden
| | - Christian Walter
- Department of Oral and Maxillofacial Surgery - Plastic Surgery, University Medical Center of the Johannes Gutenberg-University Mainz, Augustusplatz 2, 55131 Mainz, Germany.,Private Practice for Oral- and Maxillofacial Surgery - Facial Plastic Surgery, Mediplus Clinic, Haifa-Allee 20, 55128 Mainz, Germany
| | - Keyvan Sagheb
- Department of Oral and Maxillofacial Surgery - Plastic Surgery, University Medical Center of the Johannes Gutenberg-University Mainz, Augustusplatz 2, 55131 Mainz, Germany
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11
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Blatt S, Krüger M, Sagheb K, Barth M, Kämmerer PW, Al-Nawas B, Sagheb K. Tumor Recurrence and Follow-Up Intervals in Oral Squamous Cell Carcinoma. J Clin Med 2022; 11:jcm11237061. [PMID: 36498636 PMCID: PMC9740063 DOI: 10.3390/jcm11237061] [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] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 11/17/2022] [Accepted: 11/26/2022] [Indexed: 12/02/2022] Open
Abstract
Tumor recurrence in oral squamous cell carcinoma (OSCC) is frequent. However, no consensus about follow-up interval is available. The aim of this study was to analyze the recurrence pattern, detection method and associated parameters for possible risk stratification. Histopathological and epidemiological features were obtained retrospectively and correlated with tumor recurrence and overall survival, distant and lymph node metastases. A total of 760 patients were included, of which 216 patients showed tumor recurrence (mean after 24 ± 26 months). Within the first 12 months, 24% of the recurrences were detected. The primary detection method was clinical examination (n = 123, 57%). Tumor recurrence significantly correlated with advanced histopathological grading (G2/3 vs. G1, p < 0.000) and lymph node metastasis (p = 0.004). Tumor recurrence was frequent. Clinical examination was the primary detection method and manifestation within the first 6−12 months was high. The degree of histopathological grading may be useful for risk stratification.
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Affiliation(s)
- Sebastian Blatt
- Department of Oral- and Maxillofacial Surgery—Plastic Surgery, University Medical Centre, Augustusplatz 2, 55131 Mainz, Germany
- Correspondence: ; Tel.: +49-613-117-3071
| | - Maximilian Krüger
- Department of Oral- and Maxillofacial Surgery—Plastic Surgery, University Medical Centre, Augustusplatz 2, 55131 Mainz, Germany
| | - Kawe Sagheb
- Department of Prosthetic Dentistry, University Medical Centre, Augustusplatz 2, 55131 Mainz, Germany
| | - Marie Barth
- Department of Oral- and Maxillofacial Surgery—Plastic Surgery, University Medical Centre, Augustusplatz 2, 55131 Mainz, Germany
| | - Peer W. Kämmerer
- Department of Oral- and Maxillofacial Surgery—Plastic Surgery, University Medical Centre, Augustusplatz 2, 55131 Mainz, Germany
| | - Bilal Al-Nawas
- Department of Oral- and Maxillofacial Surgery—Plastic Surgery, University Medical Centre, Augustusplatz 2, 55131 Mainz, Germany
| | - Keyvan Sagheb
- Department of Oral- and Maxillofacial Surgery—Plastic Surgery, University Medical Centre, Augustusplatz 2, 55131 Mainz, Germany
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12
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Becker P, Blatt S, Pabst A, Heimes D, Al-Nawas B, Kämmerer PW, Thiem DGE. Comparison of Hyperspectral Imaging and Microvascular Doppler for Perfusion Monitoring of Free Flaps in an In Vivo Rodent Model. J Clin Med 2022; 11:jcm11144134. [PMID: 35887901 PMCID: PMC9321983 DOI: 10.3390/jcm11144134] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Revised: 07/12/2022] [Accepted: 07/14/2022] [Indexed: 01/27/2023] Open
Abstract
To reduce microvascular free flap failure (MFF), monitoring is crucial for the early detection of malperfusion and allows timely salvage. Therefore, the aim of this study was to evaluate hyperspectral imaging (HSI) in comparison to micro-Doppler sonography (MDS) to monitor MFF perfusion in an in vivo rodent model. Bilateral groin flaps were raised on 20 Sprague−Dawley rats. The femoral artery was transected on the trial side and re-anastomosed. Flaps and anastomoses were assessed before, during, and after the period of ischemia every ten minutes for overall 60 min using HSI and MDS. The contralateral sides’ flaps served as controls. Tissue-oxygenation saturation (StO2), near-infrared perfusion index (NPI), hemoglobin (THI), and water distribution (TWI) were assessed by HSI, while blood flow was assessed by MDS. HSI correlates with the MDS signal in the case of sufficient and completely interrupted perfusion. HSI was able to validly and reproducibly detect tissue perfusion status using StO2 and NPI. After 40 min, flap perfusion decreased due to the general aggravation of hemodynamic circulatory situation, which resulted in a significant drop of StO2 (p < 0.005) and NPI (p < 0.005), whereas the Doppler signal remained unchanged. In accordance, HSI might be suitable to detect MFF general complications in an early stage and further decrease MFF failure rates, whereas MDS may only be used for direct complications at the anastomose site.
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Affiliation(s)
- Philipp Becker
- Department of Oral and Maxillofacial Surgery, Federal Armed Forces Hospital, Rübenacherstr. 170, 56072 Koblenz, Germany;
- Department of Oral and Maxillofacial Surgery, University Medical Centre Mainz, 55131 Mainz, Germany; (S.B.); (D.H.); (B.A.-N.); (P.W.K.); (D.G.E.T.)
- Correspondence:
| | - Sebastian Blatt
- Department of Oral and Maxillofacial Surgery, University Medical Centre Mainz, 55131 Mainz, Germany; (S.B.); (D.H.); (B.A.-N.); (P.W.K.); (D.G.E.T.)
| | - Andreas Pabst
- Department of Oral and Maxillofacial Surgery, Federal Armed Forces Hospital, Rübenacherstr. 170, 56072 Koblenz, Germany;
- Department of Oral and Maxillofacial Surgery, University Medical Centre Mainz, 55131 Mainz, Germany; (S.B.); (D.H.); (B.A.-N.); (P.W.K.); (D.G.E.T.)
| | - Diana Heimes
- Department of Oral and Maxillofacial Surgery, University Medical Centre Mainz, 55131 Mainz, Germany; (S.B.); (D.H.); (B.A.-N.); (P.W.K.); (D.G.E.T.)
| | - Bilal Al-Nawas
- Department of Oral and Maxillofacial Surgery, University Medical Centre Mainz, 55131 Mainz, Germany; (S.B.); (D.H.); (B.A.-N.); (P.W.K.); (D.G.E.T.)
| | - Peer W. Kämmerer
- Department of Oral and Maxillofacial Surgery, University Medical Centre Mainz, 55131 Mainz, Germany; (S.B.); (D.H.); (B.A.-N.); (P.W.K.); (D.G.E.T.)
| | - Daniel G. E. Thiem
- Department of Oral and Maxillofacial Surgery, University Medical Centre Mainz, 55131 Mainz, Germany; (S.B.); (D.H.); (B.A.-N.); (P.W.K.); (D.G.E.T.)
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13
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Kyyak S, Blatt S, Wiesmann N, Smeets R, Kaemmerer PW. Hyaluronic Acid with Bone Substitutes Enhance Angiogenesis In Vivo. Materials (Basel) 2022; 15:ma15113839. [PMID: 35683136 PMCID: PMC9181602 DOI: 10.3390/ma15113839] [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] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Revised: 05/15/2022] [Accepted: 05/23/2022] [Indexed: 12/04/2022]
Abstract
Introduction: The effective induction of angiogenesis is directly related to the success of bone-substitute materials (BSM) for maxillofacial osseous regeneration. Therefore, the addition of pro-angiogenic properties to a commercially available bovine bone-substitute material in combination with hyaluronic acid (BSM+) was compared to the same bone-substitute material without hyaluronic acid (BSM) in an in-vivo model. Materials and Methods: BSM+ and BSM were incubated for six days on the chorioallantoic membrane (CAM) of fertilized chicken eggs. Microscopically, the number of vessels and branching points, the vessel area and vessel length were evaluated. Subsequently, the total vessel area and brightness integration were assessed after immunohistochemical staining (H&E, alphaSMA). Results: In the BSM+ group, a significantly higher number of vessels (p < 0.001), branching points (p = 0.001), total vessel area (p < 0.001) as well as vessel length (p = 0.001) were found in comparison to the BSM group without hyaluronic acid. Immunohistochemically, a significantly increased total vessel area (p < 0.001 for H&E, p = 0.037 for alphaSMA) and brightness integration (p = 0.047) for BSM+ in comparison to the native material were seen. Conclusions: The combination of a xenogenic bone-substitute material with hyaluronic acid significantly induced angiogenesis in vivo. This might lead to a faster integration and an improved healing in clinical situations.
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Affiliation(s)
- Solomiya Kyyak
- Department of Oral and Maxillofacial Surgery, University Medical Center Mainz, Augustusplatz 2, 55131 Mainz, Germany; (S.K.); (S.B.); (N.W.)
| | - Sebastian Blatt
- Department of Oral and Maxillofacial Surgery, University Medical Center Mainz, Augustusplatz 2, 55131 Mainz, Germany; (S.K.); (S.B.); (N.W.)
| | - Nadine Wiesmann
- Department of Oral and Maxillofacial Surgery, University Medical Center Mainz, Augustusplatz 2, 55131 Mainz, Germany; (S.K.); (S.B.); (N.W.)
- Department of Otorhinolaryngology, University Medical Center Mainz, Langenbeckstraße 1, 55131 Mainz, Germany
| | - Ralf Smeets
- Division “Regenerative Orofacial Medicine”, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246 Hamburg, Germany;
- Department of Oral and Maxillofacial Surgery, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246 Hamburg, Germany
| | - Peer W. Kaemmerer
- Department of Oral and Maxillofacial Surgery, University Medical Center Mainz, Augustusplatz 2, 55131 Mainz, Germany; (S.K.); (S.B.); (N.W.)
- Correspondence:
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14
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Blatt S, Krüger M, Rump C, Zimmer S, Sagheb K, Künzel J. Differences in PD-L1 Expression between oral and oropharyngeal squamous cell carcinoma. PLoS One 2022; 17:e0269136. [PMID: 35622885 PMCID: PMC9140279 DOI: 10.1371/journal.pone.0269136] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Accepted: 05/14/2022] [Indexed: 12/09/2022] Open
Abstract
Treatment of metastasized or recurrent oral (OSCC) and oropharyngeal (OPSCC) squamous cell carcinoma remains challenging. Targeted antibody-based therapy inter alia for PD-1 / PD-L1 axis shows promising results, but whether PD-L1 expression varies between the subentities remains unclear. The expression pattern of PD-L1 (EPR19759 antibody, Abcam, Berlin, Germany) and p16 (CINtech® Histology Kit, Ventana, Oro Valley, USA) was determined immunohistochemically and analyzed by HALO™ Image Analysis Software (Indica Lab, Albuquerque, USA). For PD-L1, combined positivity score (CPS), tumor proportion score (TPS) and histoscore, were assessed and results correlated with epidemiological data. In total, 161 patients (OSCC: n = 78, OPSCC: n = 83) were included. A mean of 43.6% (±34.0%) of the specimen showed increased PD-L1 expression that did not differ quantitatively between subentities (TPS: p = 0.159, CPS: p = 0.078), but qualitatively (histoscore: p = 0.003). In the mean follow-up period (45.6 months), contrary to age (p = 0.006) and advanced T-Status (p = 0.018), PD-L1 expression did not correlate with overall (OS, p = 0.191) and recurrence free survival (RFS: p = 0.193) in both subentities. No correlation of p16 and PD-L1 expression was found (p = 0.844). PD-L1 is differentially expressed between OSCC and OPSCC, however without influence on OS. Furthermore, p16 status was not related to PD-L1 expression. This may have implications for future (immune) therapeutical approaches for oral cancer.
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Affiliation(s)
- Sebastian Blatt
- Department of Oral and Maxillofacial Surgery, University Medical Center, Mainz, Germany
- * E-mail:
| | - Maximilian Krüger
- Department of Oral and Maxillofacial Surgery, University Medical Center, Mainz, Germany
| | - Constantin Rump
- Department of Oral and Maxillofacial Surgery, University Medical Center, Mainz, Germany
| | - Stefanie Zimmer
- Institute of Pathology and Tissue Bank, University Medical Center, Mainz, Germany
| | - Keyvan Sagheb
- Department of Oral and Maxillofacial Surgery, University Medical Center, Mainz, Germany
| | - Julian Künzel
- Department of Otorhinolaryngology, University Hospital Regensburg, Regensburg, Germany
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15
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Pabst A, Sagheb K, Blatt S, Sagheb K, Schröger S, Wentaschek S, Schumann S. Biomechanical Characterization of a New Acellular Dermal Matrix for Oral Soft Tissue Regeneration. J INVEST SURG 2022; 35:1296-1303. [DOI: 10.1080/08941939.2022.2047245] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Andreas Pabst
- Department of Oral and Maxillofacial Surgery, Federal Armed Forces Hospital, Koblenz, Germany
- Department of Oral and Maxillofacial Surgery, University Medical Center Mainz, Mainz, Germany
| | - Keyvan Sagheb
- Department of Oral and Maxillofacial Surgery, University Medical Center Mainz, Mainz, Germany
| | - Sebastian Blatt
- Department of Oral and Maxillofacial Surgery, University Medical Center Mainz, Mainz, Germany
| | - Kawe Sagheb
- Department of Prosthodontics, University Medical Center Mainz, Mainz, Germany
| | - Saskia Schröger
- Department of Oral and Maxillofacial Surgery, University Medical Center Mainz, Mainz, Germany
| | - Stefan Wentaschek
- Department of Prosthodontics, University Medical Center Mainz, Mainz, Germany
| | - Sven Schumann
- Institute for Microscopic Anatomy and Neurobiology, University Medical Center Mainz, Mainz, Germany
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16
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Blatt S, Krüger M, Kämmerer PW, Thiem DGE, Matheis P, Eisenbeiß AK, Wiltfang J, Al-Nawas B, Naujokat H. Non-Interventional Prospective Observational Study of Platelet Rich Fibrin as a Therapy Adjunctive in Patients with Medication-Related Osteonecrosis of the Jaw. J Clin Med 2022; 11:jcm11030682. [PMID: 35160132 PMCID: PMC8837070 DOI: 10.3390/jcm11030682] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Revised: 01/19/2022] [Accepted: 01/26/2022] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Medication-related osteonecrosis (MRONJ) of the jaw is a severe and feared side effect of antiresorptive therapy in the oncological setting. With growing evidence that impaired angiogenesis may represent a key factor in pathogenesis, the aim of this study was to evaluate an autologous platelet concentrate as a possible additive in surgical therapy to optimize vascularization and, subsequently, resolution rates. MATERIAL AND METHODS A non-interventional, prospective, multicenter study was conducted, and all patients with stage I-III MRONJ, undergoing antiresorptive therapy for an oncological indication, were included. The necrosis was treated surgically without (study arm A) or with (arm B) the addition of an autologous platelet concentrate (platelet-rich fibrin, PRF). RESULTS After 5, 14, and 42 days postoperative, wound healing (primary outcome: mucosal integrity) as well as downstaging, pain perception, and oral health-related quality of life (secondary outcome) were assessed via clinical evaluation. Among the 52 patients included, primarily with MRONJ stage I and II, the use of PRF as an additive in surgical therapy did not display a significant advantage for wound healing (p = 0.302), downstaging (p = 0.9), pain reduction (p = 0.169), or quality of life (p = 0.9). SUMMARY In conclusion, PRF as an adjunct did not significantly optimize wound healing. Further, no significant changes in terms of downstaging, pain sensation, and oral health-related quality of life were found.
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Affiliation(s)
- Sebastian Blatt
- Department of Oral and Maxillofacial Surgery, University Medical Center, 55131 Mainz, Germany; (M.K.); (P.W.K.); (D.G.E.T.); (P.M.); (B.A.-N.)
- Correspondence: ; Tel.: +49-6131-173071
| | - Maximilian Krüger
- Department of Oral and Maxillofacial Surgery, University Medical Center, 55131 Mainz, Germany; (M.K.); (P.W.K.); (D.G.E.T.); (P.M.); (B.A.-N.)
| | - Peer W. Kämmerer
- Department of Oral and Maxillofacial Surgery, University Medical Center, 55131 Mainz, Germany; (M.K.); (P.W.K.); (D.G.E.T.); (P.M.); (B.A.-N.)
| | - Daniel G. E. Thiem
- Department of Oral and Maxillofacial Surgery, University Medical Center, 55131 Mainz, Germany; (M.K.); (P.W.K.); (D.G.E.T.); (P.M.); (B.A.-N.)
| | - Philipp Matheis
- Department of Oral and Maxillofacial Surgery, University Medical Center, 55131 Mainz, Germany; (M.K.); (P.W.K.); (D.G.E.T.); (P.M.); (B.A.-N.)
| | - Anne-Katrin Eisenbeiß
- Department of Oral and Maxillofacial Surgery, University Hospital Schleswig-Holstein, Christian-Albrechts-University, 24118 Kiel, Germany; (A.-K.E.); (J.W.); (H.N.)
| | - Jörg Wiltfang
- Department of Oral and Maxillofacial Surgery, University Hospital Schleswig-Holstein, Christian-Albrechts-University, 24118 Kiel, Germany; (A.-K.E.); (J.W.); (H.N.)
| | - Bilal Al-Nawas
- Department of Oral and Maxillofacial Surgery, University Medical Center, 55131 Mainz, Germany; (M.K.); (P.W.K.); (D.G.E.T.); (P.M.); (B.A.-N.)
| | - Hendrik Naujokat
- Department of Oral and Maxillofacial Surgery, University Hospital Schleswig-Holstein, Christian-Albrechts-University, 24118 Kiel, Germany; (A.-K.E.); (J.W.); (H.N.)
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17
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Blatt S, Thiem DGE, Kyyak S, Pabst A, Al-Nawas B, Kämmerer PW. Possible Implications for Improved Osteogenesis? The Combination of Platelet-Rich Fibrin With Different Bone Substitute Materials. Front Bioeng Biotechnol 2021; 9:640053. [PMID: 33816452 PMCID: PMC8010662 DOI: 10.3389/fbioe.2021.640053] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Accepted: 02/22/2021] [Indexed: 12/27/2022] Open
Abstract
Bone substitute materials (BSM) are widely used in oral regeneration, but sufficient angiogenesis is crucial for osteogenesis. The combination of BSM with autologous thrombocyte concentrations such as platelet-rich fibrin (PRF) may represent a clinical approach to overcome this limitation. This study analyzes the early influence on osteoblast (HOB) in vitro. Here, four different BSM (allogeneic, alloplastic, and two of xenogeneic origin) were combined with PRF. After the incubation with osteoblasts for 24 h, cell viability, migration, and proliferation were assessed. Next, marker of proliferation, migration, and differentiation were evaluated on gene and protein levels in comparison to the native BSM and osteoblast alone. Addition of PRF increased viability for both the xenogeneic BSM (p = 0.0008, p = 0.032, respectively) in comparison to HOB and vs. native BSM (p = 0.008), and led to a tendency for increased cell proliferation and migration for all BSM (each p > 0.05). On gene basis, allogeneic and alloplastic BSM displayed a significantly increased RUNX2 expression (each p = 0.050). Expression of alkaline phosphatase for alloplastic (p = 0.050) and collagen-1 for xenogeneic BSM (p = 0.05) were significantly increased in combination with PRF. In addition, bone morphogenic protein was expressed significantly higher when xenogeneic material was combined with PRF in comparison to HOB alone (each p = 0.05). In summary, the combination of PRF with different BSM increases initial viability and may influence early proliferation and migration potential of osteoblast via RUNX2, alkaline phosphatase, collagen, and BMP2 especially in combination with alloplastic and xenogeneic BSM. Biofunctionalization of BSM using PRF might improve osteogenesis and extend the range of indications.
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Affiliation(s)
- Sebastian Blatt
- Department of Oral and Maxillofacial Surgery, University Medical Center, Johannes Gutenberg University Mainz, Mainz, Germany.,Platform for Biomaterial Research, BiomaTiCS Group, University Medical Center, Johannes Gutenberg University Mainz, Mainz, Germany
| | - Daniel G E Thiem
- Department of Oral and Maxillofacial Surgery, University Medical Center, Johannes Gutenberg University Mainz, Mainz, Germany
| | - Solomiya Kyyak
- Department of Oral and Maxillofacial Surgery, University Medical Center, Johannes Gutenberg University Mainz, Mainz, Germany
| | - Andreas Pabst
- Department of Oral and Maxillofacial Surgery, Federal Armed Forces Hospital, Koblenz, Germany
| | - Bilal Al-Nawas
- Department of Oral and Maxillofacial Surgery, University Medical Center, Johannes Gutenberg University Mainz, Mainz, Germany
| | - Peer W Kämmerer
- Department of Oral and Maxillofacial Surgery, University Medical Center, Johannes Gutenberg University Mainz, Mainz, Germany
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Kyyak S, Blatt S, Schiegnitz E, Heimes D, Staedt H, Thiem DGE, Sagheb K, Al-Nawas B, Kämmerer PW. Activation of Human Osteoblasts via Different Bovine Bone Substitute Materials With and Without Injectable Platelet Rich Fibrin in vitro. Front Bioeng Biotechnol 2021; 9:599224. [PMID: 33681155 PMCID: PMC7925396 DOI: 10.3389/fbioe.2021.599224] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Accepted: 01/21/2021] [Indexed: 01/06/2023] Open
Abstract
Introduction The aim of the in vitro study was to compare the effect of four bovine bone substitute materials (XBSM) with and without injectable platelet-reach fibrin for viability and metabolic activity of human osteoblasts (HOB) as well as expression of alkaline phosphatase (ALP), bone morphogenetic protein 2 (BMP-2), and osteonectin (OCN). Materials and Methods Cerabone® (CB), Bio-Oss® (BO), Creos Xenogain® (CX) and MinerOss® X (MO) ± i-PRF were incubated with HOB. At day 3, 7, and 10, cell viability and metabolic activity as well as expression of ALP, OCN, and BMP-2, was examined. Results For non-i-PRF groups, the highest values concerning viability were seen for CB at all time points. Pre-treatment with i-PRF increased viability in all groups with the highest values for CB-i-PRF after 3 and 7 and for CX-i-PRF after 10 days. For metabolic activity, the highest rate among non-i-PRF groups was seen for MO at day 3 and for CB at day 7 and 10. Here, i-PRF groups showed higher values than non-i-PRF groups (highest values: CB + i-PRF) at all time points. There was no difference in ALP-expression between groups. For OCN expression in non-i-PRF groups, CB showed the highest values after day 3, CX after day 7 and 10. Among i-PRF-groups, the highest values were seen for CX + i-PRF. At day 3, the highest BMP-2 expression was observed for CX. Here, for i-PRF groups, the highest increase was seen for CX + i-PRF at day 3. At day 7 and 10, there was no significant difference among groups. Conclusion XBSM sintered under high temperature showed increased HOB viability and metabolic activity through the whole period when compared to XBSM manufactured at lower temperatures. Overall, the combination of XBSM with i-PRF improved all cellular parameters, ALP and BMP-2 expression at earlier stages as well as OCN expression at later stages.
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Affiliation(s)
- Solomiya Kyyak
- Department of Oral- and Maxillofacial Surgery, University Medical Center Mainz, Mainz, Germany
| | - Sebastian Blatt
- Department of Oral- and Maxillofacial Surgery, University Medical Center Mainz, Mainz, Germany
| | - Eik Schiegnitz
- Department of Oral- and Maxillofacial Surgery, University Medical Center Mainz, Mainz, Germany
| | - Diana Heimes
- Department of Oral- and Maxillofacial Surgery, University Medical Center Mainz, Mainz, Germany
| | - Henning Staedt
- Private Practice, University Medical Center Rostock, Rostock, Germany.,Department of Prosthodontics and Materials Science, University Medical Center Rostock, Rostock, Germany
| | - Daniel G E Thiem
- Department of Oral- and Maxillofacial Surgery, University Medical Center Mainz, Mainz, Germany
| | - Keyvan Sagheb
- Department of Oral- and Maxillofacial Surgery, University Medical Center Mainz, Mainz, Germany
| | - Bilal Al-Nawas
- Department of Oral- and Maxillofacial Surgery, University Medical Center Mainz, Mainz, Germany
| | - Peer W Kämmerer
- Department of Oral- and Maxillofacial Surgery, University Medical Center Mainz, Mainz, Germany
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Heinz A, Trautmann J, Šantić N, Jihyun Park A, Bloch I, Blatt S. Crossed optical cavities with large mode diameters. Opt Lett 2021; 46:250-253. [PMID: 33448999 DOI: 10.1364/ol.414076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Accepted: 12/10/2020] [Indexed: 06/12/2023]
Abstract
We report on a compact, ultrahigh-vacuum compatible optical assembly to create large-scale, two-dimensional optical lattices for use in experiments with ultracold atoms. The assembly consists of an octagon-shaped spacer made from ultra-low-expansion glass, to which we optically contact four fused silica cavity mirrors, making it highly mechanically and thermally stable. The mirror surfaces are nearly plane-parallel, which allows us to create two perpendicular cavity modes with diameters ∼1m m. Such large mode diameters are desirable to increase the optical lattice homogeneity, but lead to strong angular sensitivities of the coplanarity between the two cavity modes. We demonstrate a procedure to precisely position each mirror substrate that achieves a deviation from coplanarity of d=1(5)µm. Creating large optical lattices at arbitrary visible and near-infrared wavelengths requires significant power enhancements to overcome limitations in the available laser power. The cavity mirrors have a customized low-loss mirror coating that enhances the power at a set of relevant visible and near-infrared wavelengths by up to 3 orders of magnitude..
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Blatt S, Pabst A, Zimmer S, Walter C, Al-Nawas B, Krüger M. Clinical efficacy of an antibody-based detection system for human papilloma virus infection in oral squamous cell carcinoma. Clin Oral Investig 2020; 25:2837-2843. [PMID: 33098030 PMCID: PMC8060226 DOI: 10.1007/s00784-020-03601-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Accepted: 09/17/2020] [Indexed: 11/26/2022]
Abstract
Objectives There is an increasing number of oral squamous cell carcinoma (OSCC) associated with HPV-16. However, p16 expression by immunohistochemistry as the current gold standard for a surrogate marker for virus infection reveals unsatisfying diagnostic accuracy. The aim of this study was to investigate a new rapid test for L1 antibody detection (Prevocheck®) and to validate its diagnostic performance. Materials and methods In a prospective study, the HPV 16 association of all consecutive patients with an OSCC treated between 2015 and 2019 were analyzed by L1 seropositivity (via PrevoCheck®), p16 immunostaining, and partly multiplex PCR for subtype analysis. Results Overall (n = 107), p16 expression was positive in 17 cases (15.9%), and L1 antibody seropositivity in 7 cases (6.5%). In PCR analysis, two cases of HPV35 and 50 were found. Total HPV prevalence was 8.4% overall and 6.5% for HPV-16. An inferior diagnostic accuracy for HPV-16-associated OSCC in comparison to PrevoCheck® was revealed. Conclusion The rapid test for L1 antibodies showed an optimal sensitivity and specificity, positive and negative predictive value, and an overall diagnostic accuracy of 100%. However, HPV prevalence seems low in OSCC. Clinical relevance L1 rapid test may represent an additional diagnostic staging method to detect HPV-16 association rather than p16 immunohistochemistry.
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Affiliation(s)
- Sebastian Blatt
- Department of Oral- and Maxillofacial Surgery - Plastic Surgery, University Medical Centre, Augustusplatz 2, 55131, Mainz, Germany.
| | - Andreas Pabst
- Department of Oral- and Maxillofacial Surgery, Federal Armed Forces Hospital, Rübenacher Straße 170, 56072, Koblenz, Germany
| | - Stefanie Zimmer
- Department of Pathology, University Medical Centre, Langenbeckstraße 1, 55131, Mainz, Germany
| | - Christian Walter
- Oral- and Maxillofacial Surgery - Facial Plastic Surgery, Mediplus Clinic, Haifa-Allee 20, 55128, Mainz, Germany
| | - Bilal Al-Nawas
- Department of Oral- and Maxillofacial Surgery - Plastic Surgery, University Medical Centre, Augustusplatz 2, 55131, Mainz, Germany
| | - Maximilian Krüger
- Department of Oral- and Maxillofacial Surgery - Plastic Surgery, University Medical Centre, Augustusplatz 2, 55131, Mainz, Germany
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Brandstetter G, Blatt S, Goldschmitt J, Taylor L, Heymann P, Al-Nawas B, Ziebart T. Targeted sensitization of tumor cells for radiation through monocarboxylate transporters 1 and 4 inhibition in vitro. Clin Oral Investig 2020; 25:295-310. [PMID: 32495222 DOI: 10.1007/s00784-020-03364-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Accepted: 05/19/2020] [Indexed: 12/21/2022]
Abstract
OBJECTIVES Monocarboxylate transporters (MCT) 1, 2 and 4 play an important role in tumor metabolism. The amount of lactate transported by MCT's highly correlates with overall survival. Furthermore, glycolysis and hypoxia are possible causes for radiation resistance. MATERIALS AND METHODS An oral squamous cell carcinoma cell line (CAL27, ATCC) was analyzed in an in vitro cell assay. After incubation with two different inhibitors for MCT1 (AR-C122982/SR-13800 and AR-C155858/SR-13801, Tocris) or for MCT4 (simvastatin, Sigma-Aldrich and 2-cyano-3-(4-hydroxyphenyl)-2-propenoic acid (CHC), Tocris), cells were irradiated with six gray with a Gammacell 2000 (Nuklear Data). For analysis, cell counting assay, wound healing assay, MTT assay and clonogenic assay were applied. RESULTS Cell counting assay showed significant lower results for simvastatin, CHC and for the highest concentrations of AR-C122982 and AR-C155858 (p < 0.03). Additionally, cell counts decreased significantly with irradiation after 72 hours (p < 0.05) only for AR-C122982, CHC and simvastatin. The clonogenic assay confirmed these results with substantially reduced growth when incubated with CHC, simvastatin and AR-C155858 (p < 0.002). Furthermore, MCT1 and 4 inhibition led to highly reduced migration (p < 0.05). There again, comparing the wound healing assay of irradiated to non-irradiated tests showed contrary results (controls: p < 0.001; AR-C155858: p > 0.05; AR-C122982: p > 0.32; CHC: p > 0.1; simvastatin p > 0.1). The MTT assay presented significant effects with MCT1 and 4 inhibition (simvastatin/AR-C122982/CHC: p < 0.007). Irradiated cells showed significantly lower expression after only 48 h compared to non-irradiated cells (simvastatin/AR-C122982/CHC: p < 0.02). CONCLUSIONS Inhibition of MCT, especially MCT4 may represent a possible tool to overcome radiation resistance in tumor cell lines. CLINICAL RELEVANCE MCT Inhibitors may be used as a possible therapeutic approach to sensitize OSCC to radiation.
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Affiliation(s)
- Gregor Brandstetter
- Department of Oral and Maxillofacial Surgery, University Medical Center, Augustusplatz 2, 55131, Mainz, Germany.
| | - Sebastian Blatt
- Department of Oral and Maxillofacial Surgery, University Medical Center, Augustusplatz 2, 55131, Mainz, Germany
| | - Jutta Goldschmitt
- Department of Oral and Maxillofacial Surgery, University Medical Center, Augustusplatz 2, 55131, Mainz, Germany
| | - Louise Taylor
- Department of Oral and Maxillofacial Surgery, University Medical Center, Augustusplatz 2, 55131, Mainz, Germany
| | - Paul Heymann
- Clinic for Oral and Maxillofacial Surgery, University of Marburg, Baldingerstrasse, 35043, Marburg, Germany
| | - Bilal Al-Nawas
- Department of Oral and Maxillofacial Surgery, University Medical Center, Augustusplatz 2, 55131, Mainz, Germany
| | - Thomas Ziebart
- Clinic for Oral and Maxillofacial Surgery, University of Marburg, Baldingerstrasse, 35043, Marburg, Germany
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Heinz A, Park AJ, Šantić N, Trautmann J, Porsev SG, Safronova MS, Bloch I, Blatt S. State-Dependent Optical Lattices for the Strontium Optical Qubit. Phys Rev Lett 2020; 124:203201. [PMID: 32501054 DOI: 10.1103/physrevlett.124.203201] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2019] [Accepted: 04/20/2020] [Indexed: 06/11/2023]
Abstract
We demonstrate state-dependent optical lattices for the Sr optical qubit at the tune-out wavelength for its ground state. We tightly trap excited state atoms while suppressing the effect of the lattice on ground state atoms by more than 4 orders of magnitude. This highly independent control over the qubit states removes inelastic excited state collisions as the main obstacle for quantum simulation and computation schemes based on the Sr optical qubit. Our results also reveal large discrepancies in the atomic data used to calibrate the largest systematic effect of Sr optical lattice clocks.
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Affiliation(s)
- A Heinz
- Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Straße 1, 85748 Garching, Germany
- Munich Center for Quantum Science and Technology, 80799 München, Germany
| | - A J Park
- Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Straße 1, 85748 Garching, Germany
- Munich Center for Quantum Science and Technology, 80799 München, Germany
| | - N Šantić
- Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Straße 1, 85748 Garching, Germany
- Munich Center for Quantum Science and Technology, 80799 München, Germany
| | - J Trautmann
- Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Straße 1, 85748 Garching, Germany
- Munich Center for Quantum Science and Technology, 80799 München, Germany
| | - S G Porsev
- Department of Physics and Astronomy, University of Delaware, Newark, Delaware 19716, USA
- Petersburg Nuclear Physics Institute of NRC "Kurchatov Institute," Gatchina, Leningrad District 188300, Russia
| | - M S Safronova
- Department of Physics and Astronomy, University of Delaware, Newark, Delaware 19716, USA
- Joint Quantum Institute, National Institute of Standards and Technology and the University of Maryland, College Park, Maryland 20742, USA
| | - I Bloch
- Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Straße 1, 85748 Garching, Germany
- Munich Center for Quantum Science and Technology, 80799 München, Germany
- Fakultät für Physik, Ludwig-Maximilians-Universität München, 80799 München, Germany
| | - S Blatt
- Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Straße 1, 85748 Garching, Germany
- Munich Center for Quantum Science and Technology, 80799 München, Germany
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Kyyak S, Blatt S, Pabst A, Thiem D, Al-Nawas B, Kämmerer PW. Combination of an allogenic and a xenogenic bone substitute material with injectable platelet-rich fibrin - A comparative in vitro study. J Biomater Appl 2020; 35:83-96. [PMID: 32237950 DOI: 10.1177/0885328220914407] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The aim of the in vitro study was a comparison of an allogenic (ABSM) and a xenogenic bone substitute material (XBSM) with and without injectable platelet-rich fibrin (ABSM-i-PRF & XBSM-i-PRF) on cell characteristics of human osteoblasts (HOB). Here, ABSM and XBSM (+ i-PRF = test; - i-PRF = control) were incubated with HOB for 3, 7 and 10 days. HOB viability, migration, proliferation and differentiation (RT-PCR on alkaline phosphatase (AP), bone morphogenetic protein 2 (BMP-2) and osteonectin (OCN)) were measured and compared between groups. At day 3, an increased viability, migration and proliferation was seen for ABSM-i-PRF. For viability and proliferation (days 7 and 10) and for migration (day 10), ABSM-i-PRF/XBSM-i-PRF showed higher values compared to ABSM/XBSM with maximum values for ABSM-i-PRF and minimum values for XBSM. At days 3 and 7, the highest expression of AP was detected in ABSM-i-PRF/XBSM-i-PRF when compared to ABSM/XBSM, whereas at day 10, AP expression levels were elevated in ABSM-i-PRF/ABSM. The highest BMP-2 expression was seen in ABSM-i-PRF whereas OCN expression showed higher levels in ABSM-i-PRF/XBSM-i-PRF at days 3 and 7 with lowest expression for ABSM. Later on, elevated OC levels were detected for ABSM-i-PRF only. In conclusion, i-PRF in combination with ABSM enhances HOB activity when compared to XBSM-i-PRF or untreated BSM in vitro. Therefore, addition of i-PRF to ABSM and - to a lower extent - to XBSM may influence osteoblast activity in vivo.
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Affiliation(s)
- Solomiya Kyyak
- Department of Oral- and Maxillofacial Surgery, University Medical Center Mainz, Mainz, Germany
| | - Sebastian Blatt
- Department of Oral- and Maxillofacial Surgery, University Medical Center Mainz, Mainz, Germany
| | - Andreas Pabst
- Department of Oral- and Maxillofacial Surgery, Federal Armed Forces Hospital, Koblenz, Germany
| | - Daniel Thiem
- Department of Oral- and Maxillofacial Surgery, University Medical Center Mainz, Mainz, Germany
| | - Bilal Al-Nawas
- Department of Oral- and Maxillofacial Surgery, University Medical Center Mainz, Mainz, Germany
| | - Peer W Kämmerer
- Department of Oral- and Maxillofacial Surgery, University Medical Center Mainz, Mainz, Germany
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Heller M, Bauer H, Schwab R, Blatt S, Peters K, Nezi‐Cahn S, Unger RE, Hasenburg A, Brenner W. The impact of intercellular communication for the generation of complex multicellular prevascularized tissue equivalents. J Biomed Mater Res A 2019; 108:734-748. [DOI: 10.1002/jbm.a.36853] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2019] [Revised: 11/21/2019] [Accepted: 11/22/2019] [Indexed: 01/04/2023]
Affiliation(s)
- Martin Heller
- Department of Gynecology University Medical Center of the Johannes Gutenberg University Mainz Mainz Germany
- BiomaTiCS—Biomaterials, Tissues and Cells in Science University Medical Center of the Johannes Gutenberg University Mainz Mainz Germany
| | - Heide‐Katharina Bauer
- Department of Gynecology University Medical Center of the Johannes Gutenberg University Mainz Mainz Germany
- BiomaTiCS—Biomaterials, Tissues and Cells in Science University Medical Center of the Johannes Gutenberg University Mainz Mainz Germany
| | - Roxana Schwab
- Department of Gynecology University Medical Center of the Johannes Gutenberg University Mainz Mainz Germany
- BiomaTiCS—Biomaterials, Tissues and Cells in Science University Medical Center of the Johannes Gutenberg University Mainz Mainz Germany
| | - Sebastian Blatt
- BiomaTiCS—Biomaterials, Tissues and Cells in Science University Medical Center of the Johannes Gutenberg University Mainz Mainz Germany
- Department of Maxillofacial Surgery University Medical Center of the Johannes Gutenberg University Mainz Mainz Germany
| | - Katharina Peters
- Department of Gynecology University Medical Center of the Johannes Gutenberg University Mainz Mainz Germany
- BiomaTiCS—Biomaterials, Tissues and Cells in Science University Medical Center of the Johannes Gutenberg University Mainz Mainz Germany
| | - Sandra Nezi‐Cahn
- Department of Gynecology University Medical Center of the Johannes Gutenberg University Mainz Mainz Germany
- BiomaTiCS—Biomaterials, Tissues and Cells in Science University Medical Center of the Johannes Gutenberg University Mainz Mainz Germany
| | - Ronald E. Unger
- BiomaTiCS—Biomaterials, Tissues and Cells in Science University Medical Center of the Johannes Gutenberg University Mainz Mainz Germany
- Institute for Pathology University Medical Center of the Johannes Gutenberg University Mainz Mainz Germany
| | - Annette Hasenburg
- Department of Gynecology University Medical Center of the Johannes Gutenberg University Mainz Mainz Germany
| | - Walburgis Brenner
- Department of Gynecology University Medical Center of the Johannes Gutenberg University Mainz Mainz Germany
- BiomaTiCS—Biomaterials, Tissues and Cells in Science University Medical Center of the Johannes Gutenberg University Mainz Mainz Germany
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Pabst AM, Blatt S, Epperlein P, Schmidtmann I, Krüger M, Schiegnitz E, Goetze E, Ziebart T, Al-Nawas B. The risk of tooth root injuries using cortical screws for intermaxillary fixation and osteosynthesis plates - A retrospective analysis. J Craniomaxillofac Surg 2019; 47:1767-1778. [PMID: 31711997 DOI: 10.1016/j.jcms.2019.08.006] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Revised: 07/28/2019] [Accepted: 08/27/2019] [Indexed: 11/29/2022] Open
Abstract
Intermaxillary fixation (IMF) and osteosynthesis plates (OP) are widely used for the non-surgical and surgical treatment of mandible and condyle fractures. The aim of this retrospective study was to analyze the frequency of tooth root injuries by IMF and OP screws. Electronic patient reports (2004-2013) were screened for patients treated with either IMF screws and/or OP in the Department of Oral- and Maxillofacial Surgery, University Medical Center Mainz, Germany. The frequency and the position of endangered and injured teeth were analyzed by orthopantomogram (OPTG) and cone beam computer tomography (CBCT). Next, possible predictive factors for tooth root injuries, namely interdental- and crestal distance, screw length and distance between tooth root and screw were evaluated. Further, the accuracy of OPTG vs. CBCT concerning the diagnosis of tooth root injuries was analyzed. Three-hundred sixty-six patients were included and 3388 teeth were defined as endangered by IMF- and OP screws. Overall, 16 injured teeth (0.5%) in 13 patients (3.55%) were detected. Nine injuries (56.3%) were caused by IMF- and seven injuries (43.8%) by OP screws. Three teeth were non-vital, one tooth had to be extracted. No correlation between the predictive factors crestal distance, screw length and tooth root injuries was found. If tooth injury occurred, a significant correlation between the interdental distance and the distance between tooth root and screw was found (κ = 0.48; p < 0,0001). Comparison between OPTG vs. CBCT demonstrated that many of the injuries that were seen in the OPTG (n = 230) could not be verified in the CBCT scans (n = 16) (κ = 0.12). To conclude, screws for IMF and OP can be considered as a safe procedure concerning the risk of tooth root injuries.
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Affiliation(s)
- Andreas Max Pabst
- Department of Oral- and Maxillofacial Surgery, Federal Armed Forces Hospital, (Head: Prof. Dr. Dr. R. Werkmeister), Rübenacherstrasse 170, 56072 Koblenz, Germany; Department of Oral- and Maxillofacial Surgery, University Medical Center, (Head: Univ.-Prof. Dr. Dr. B. Al-Nawas), Augustusplatz 2, 55131 Mainz, Germany.
| | - Sebastian Blatt
- Department of Oral- and Maxillofacial Surgery, University Medical Center, (Head: Univ.-Prof. Dr. Dr. B. Al-Nawas), Augustusplatz 2, 55131 Mainz, Germany
| | - Pia Epperlein
- Department of Oral- and Maxillofacial Surgery, University Medical Center, (Head: Univ.-Prof. Dr. Dr. B. Al-Nawas), Augustusplatz 2, 55131 Mainz, Germany
| | - Irene Schmidtmann
- Institute for Medical Biometry, Epidemiology and Informatics (IMBEI), University Medical Center, (Head: Prof. Dr. S. Singer), Obere Zahlbacherstr. 69, 55131 Mainz, Germany
| | - Maximilian Krüger
- Department of Oral- and Maxillofacial Surgery, University Medical Center, (Head: Univ.-Prof. Dr. Dr. B. Al-Nawas), Augustusplatz 2, 55131 Mainz, Germany
| | - Eik Schiegnitz
- Department of Oral- and Maxillofacial Surgery, University Medical Center, (Head: Univ.-Prof. Dr. Dr. B. Al-Nawas), Augustusplatz 2, 55131 Mainz, Germany
| | - Elisabeth Goetze
- Department of Oral- and Maxillofacial Surgery, University Medical Center, (Head: Univ.-Prof. Dr. Dr. B. Al-Nawas), Augustusplatz 2, 55131 Mainz, Germany
| | - Thomas Ziebart
- Department of Oral- and Maxillofacial Surgery, University Hospital Giessen and Marburg, Campus Marburg, (Head: Univ.-Prof. Dr. Dr. Andreas Neff), Baldingerstrasse, 35043 Marburg, Germany
| | - Bilal Al-Nawas
- Department of Oral- and Maxillofacial Surgery, University Medical Center, (Head: Univ.-Prof. Dr. Dr. B. Al-Nawas), Augustusplatz 2, 55131 Mainz, Germany
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Adili A, Madera-Acosta A, Raju BN, Ali B, Wise-Draper T, Parchman A, Steinbrunner J, Blatt S, Friedstrom S, Draper D. Applying Circulating CD4CD25FOXP3 T Regulatory Cells and Interleukin 10 as a Measurable Clinical Predictor of Immune Status in Cancer Patients. Int J Radiat Oncol Biol Phys 2019. [DOI: 10.1016/j.ijrobp.2019.06.1040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Mazurenko A, Blatt S, Huber F, Parsons MF, Chiu CS, Ji G, Greif D, Greiner M. Implementation of a stable, high-power optical lattice for quantum gas microscopy. Rev Sci Instrum 2019; 90:033101. [PMID: 30927819 DOI: 10.1063/1.5066623] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Accepted: 02/08/2019] [Indexed: 06/09/2023]
Abstract
We describe the design and implementation of a stable high-power 1064 nm laser system to generate optical lattices for experiments with ultracold quantum gases. The system is based on a low-noise laser amplified by an array of four heavily modified, high-power fiber amplifiers. The beam intensity is stabilized and controlled with a nonlinear feedback loop. Using real-time monitoring of the resulting optical lattice, we find the stability of the lattice site positions to be well below the lattice spacing over the course of hours. The position of the harmonic trap produced by the Gaussian envelope of the lattice beams is stable to about one lattice spacing and the long-term (six-month) relative root-mean-square stability of the lattice spacing itself is 0.5%.
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Affiliation(s)
- A Mazurenko
- Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
| | - S Blatt
- Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
| | - F Huber
- Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
| | - M F Parsons
- Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
| | - C S Chiu
- Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
| | - G Ji
- Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
| | - D Greif
- Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
| | - M Greiner
- Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
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Otto M, Blatt S, Pabst A, Mandic R, Schwarz J, Neff A, Ziebart T. Influence of buffy coat-derived putative endothelial progenitor cells on tumor growth and neovascularization in oral squamous cell carcinoma xenografts. Clin Oral Investig 2019; 23:3767-3775. [PMID: 30693401 DOI: 10.1007/s00784-019-02806-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2018] [Accepted: 01/11/2019] [Indexed: 12/14/2022]
Abstract
OBJECTIVES The aim of this murine in vivo study was to investigate whether buffy coat-derived putative endothelial progenitor cells (BCEPC) alter tumor growth and neovascularization in oral squamous cell carcinomas (OSCC). MATERIALS AND METHODS A murine xenograft model using the PCI-13 oral cancer cell line was deployed of which n = 24 animals received 2 × 106 BCEPC by transfusion whereas the control group (n = 24) received NaCl (0.9%) instead. Tumor size, volume, and capillary density were determined by sonography and measurement with a caliper. Immunohistochemical analysis was carried out with antibodies specific for Cytokeratins, Flt-4, Podoplanin, and Vimentin. RESULTS In the experimental group, systemic application of BCEPC significantly increased tumor volume to 362.49% (p = 0.0012) and weight to 352.38% (p = 0.0018) as well as vascular densities to 162.15% (p = 0.0021) compared with control tumors. In addition, BCEPC-treated xenografts exhibited higher Cytokeratin expression levels by a factor of 1.47 (p = 0.0417), Podoplanin by a factor of 3.3 (p = 0.0020) and Vimentin by a factor of 2.5 (p = 0.0001), respectively. CONCLUSIONS Immunohistochemical investigations support the notion that BCEPC transfusion influences neovascularization and lymphatic vessel density, thereby possibly promoting tumor progression. Future studies, which will include gene expression analysis, should help to define the possible role of BCEPC during OSCC progression in more detail. CLINICAL RELEVANCE Endothelial progenitor cells (EPCs) could serve as a target structure for the treatment of OSCC and possibly other solid tumors.
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Affiliation(s)
- Marius Otto
- Interdisciplinary Head & Neck Oncology Laboratory, Department for Oral and Maxillofacial Surgery, University Hospital Giessen and Marburg, Campus Marburg, Baldingerstrasse, D-35033, Marburg, Germany
| | - Sebastian Blatt
- Clinic for Oral and Maxillofacial Surgery, University Medical Center Mainz, Mainz, Germany
| | - Andreas Pabst
- Clinic for Oral and Maxillofacial Surgery, Federal Armed Forces Hospital Koblenz, Koblenz, Germany
| | - Robert Mandic
- Interdisciplinary Head & Neck Oncology Laboratory, Department of Otolaryngology, Head & Neck Surgery, University Hospital Marburg, Marburg, Germany
| | - Johanna Schwarz
- Department of Mathematics and Computer Science, Research Group for Bioinformatics, Philipps-Universität Marburg, Marburg, Germany
| | - Andreas Neff
- Interdisciplinary Head & Neck Oncology Laboratory, Department for Oral and Maxillofacial Surgery, University Hospital Giessen and Marburg, Campus Marburg, Baldingerstrasse, D-35033, Marburg, Germany
| | - Thomas Ziebart
- Interdisciplinary Head & Neck Oncology Laboratory, Department for Oral and Maxillofacial Surgery, University Hospital Giessen and Marburg, Campus Marburg, Baldingerstrasse, D-35033, Marburg, Germany.
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Beger B, Blatt S, Pabst AM, Hansen T, Goetz H, Al-Nawas B, Ziebart T. Biofunctionalization of synthetic bone substitutes with angiogenic stem cells: Influence on regeneration of critical-size bone defects in an in vivo murine model. J Craniomaxillofac Surg 2018; 46:1601-1608. [PMID: 30196861 DOI: 10.1016/j.jcms.2018.06.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [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: 12/25/2017] [Revised: 05/23/2018] [Accepted: 06/01/2018] [Indexed: 11/20/2022] Open
Abstract
PURPOSE The aim of this study was to investigate the influence of human bone marrow-derived endothelial progenitor cells (EPC) on vascularization and bone regeneration in combination with a bone-substitute material (BSM) in a critical-size bone defect in a murine model. Critical-size bone defects were performed and the defects were filled according to the group membership. MATERIALS AND METHODS Eighteen rats were randomized in two experimental groups: BSM (BoneCeramic) with/without EPC biofunctionalization, and a control group without BSM and EPC. Calvaria bone defects were performed and the defects were filled according to the group membership. After 8 weeks, qualitative tissue response of newly formed bone mass was analyzed by histology, cone beam CT (CBCT) and micro-CT (μCT) scans. Occurrence of tumor masses due to EPC vascularization in peripheral organs was investigated microscopically in histological slides of liver and kidney. RESULTS The combination of EPC and BSM showed smaller bone defects in the CT scans and the histological evaluation as the single use of BSM without EPC by trend (p = 0.067). Further, a higher amount of blood vessels could be found in histological slices of BSM in combination with EPC. No inflammatory response or tumor formation could be found. CONCLUSION These findings confirm the biocompatibility of the used BSM and provide evidence that the combination of BSM with EPC might be effective for bone vascularization and regeneration. Using EPC in augmentation sites might overall lead to faster and better bone regeneration and should be further investigated in future studies.
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Affiliation(s)
- Benjamin Beger
- Department of Oral- and Maxillofacial Surgery, (Head: Univ.-Prof. Dr. Dr. B. Al-Nawas), University Medical Center, Augustusplatz 2, 55131, Mainz, Germany.
| | - Sebastian Blatt
- Department of Oral- and Maxillofacial Surgery, (Head: Univ.-Prof. Dr. Dr. B. Al-Nawas), University Medical Center, Augustusplatz 2, 55131, Mainz, Germany
| | - Andreas Max Pabst
- Department of Oral- and Maxillofacial Surgery, (Head: Prof. Dr. Dr. R. Werkmeister), Federal Armed Forces Hospital, Rübenacherstrasse 170, 56072, Koblenz, Germany
| | - Torsten Hansen
- Institute of Pathology, (Head: Prof. Dr. T. Hansen), Clinic Lippe, Röntgenstrasse 18, 32756, Detmold, Germany
| | - Hermann Goetz
- Biomaterials in Medicine (BioAPP), (Head: Univ.-Prof. Dr. Dr. B. Al-Nawas), University Medical Center Mainz, Augustusplatz 2, 55131, Mainz, Germany
| | - Bilal Al-Nawas
- Department of Oral- and Maxillofacial Surgery, (Head: Univ.-Prof. Dr. Dr. B. Al-Nawas), University Medical Center, Augustusplatz 2, 55131, Mainz, Germany
| | - Thomas Ziebart
- Department of Oral- and Maxillofacial Surgery, (Head: Univ.-Prof. Dr. Dr. A. Neff), University Hospital Marburg, Baldingerstrasse, 35043, Marburg, Germany
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Blatt S, Schön H, Sagheb K, Kämmerer PW, Al-Nawas B, Schiegnitz E. Hemoglobin, C-reactive protein and ferritin in patients with oral carcinoma and their clinical significance – A prospective clinical study. J Craniomaxillofac Surg 2018; 46:207-212. [DOI: 10.1016/j.jcms.2017.12.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Revised: 11/28/2017] [Accepted: 12/05/2017] [Indexed: 11/24/2022] Open
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Schiegnitz E, Kämmerer PW, Schön H, Blatt S, Berres M, Sagheb K, Al-Nawas B. Proinflammatory cytokines as serum biomarker in oral carcinoma-A prospective multi-biomarker approach. J Oral Pathol Med 2018; 47:268-274. [PMID: 29272054 DOI: 10.1111/jop.12670] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/16/2017] [Indexed: 11/30/2022]
Abstract
BACKGROUND Inflammation and cell-mediated immunity have a key role in different stages of carcinogenesis. The aim of this prospective study was to assess serum levels of proinflammatory cytokines interleukin-6 (IL-6), interleukin-8 (IL-8), soluble interleukin-2 receptor (sIL-2R), tumor necrosis factor alpha (TNF-α), and MHC class I polypeptide-related sequence B (MICB) in patients with oral premalignant lesion (OPL), oral squamous cell carcinoma (OSCC), and healthy controls in a multi-biomarker approach as a potential diagnostic and prognostic tool for OSCC. MATERIAL AND METHODS A total of 205 patients (81 with OSCC, 75 with OPL, and 49 healthy controls) were included in this prospective study. Cytokine concentrations were measured by commercial enzyme linked immunoassay and chemiluminescence immunoassay. RESULTS IL-6, IL-8, and sIL-2R were significantly elevated in OSCC patients compared to healthy controls and to OPL patients. Higher T-Grade (>T2) and positive lymph node involvement resulted in significantly higher IL-6 values (P < .001 and P = .037). IL-6 serum values ≥5 pg/mL (n = 45) and sIL-2R serum values ≥623 U/mL (n = 19) indicated a significant lower survival rate compared to OSCC patients with low IL-6 (n = 36) and sIL-2R values (n = 62, P = .023 and P = .026). ROC and classification tree analyses identified the combination of IL-6 and IL-8 as diagnostic markers with good diagnostic accuracy. CONCLUSION In conclusion, IL-6, IL-8, and sIL-2R are strongly associated with OSCC oncogenesis and IL-6 and sIL-2R seem to be promising and potent biomarkers for evaluating patients' prognosis.
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Affiliation(s)
- Eik Schiegnitz
- Department of Oral and Maxillofacial Surgery, Plastic Surgery, University Medical Center of the Johannes Gutenberg-University Mainz, Mainz, Germany
| | - Peer W Kämmerer
- Department of Oral and Maxillofacial Surgery, Plastic Surgery, University Medical Center of the Johannes Gutenberg-University Mainz, Mainz, Germany
| | - Holger Schön
- Department of Oral and Maxillofacial Surgery, Plastic Surgery, University Medical Center of the Johannes Gutenberg-University Mainz, Mainz, Germany
| | - Sebastian Blatt
- Department of Oral and Maxillofacial Surgery, Plastic Surgery, University Medical Center of the Johannes Gutenberg-University Mainz, Mainz, Germany
| | - Manfred Berres
- Department of Mathematics and Technology, RheinAhrCampus Remagen, University of Applied Sciences Koblenz, Remagen, Germany.,Institute of Medical Biometry, Epidemiology and Informatics, Johannes Gutenberg-University, Mainz, Germany
| | - Keyvan Sagheb
- Department of Oral and Maxillofacial Surgery, Plastic Surgery, University Medical Center of the Johannes Gutenberg-University Mainz, Mainz, Germany
| | - Bilal Al-Nawas
- Department of Oral and Maxillofacial Surgery, Plastic Surgery, University Medical Center of the Johannes Gutenberg-University Mainz, Mainz, Germany
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Blatt S, Rahimi-Nedjat R, Sagheb K, Piechowiak L, Walter C, Brüllmann D. Coincidence of mandibular fractures with isolated posterior maxillary sinus fractures. Dent Traumatol 2017; 33:345-349. [PMID: 28429855 DOI: 10.1111/edt.12345] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/18/2017] [Indexed: 11/30/2022]
Abstract
BACKGROUND/AIM There are no data available to show whether there is a relationship between mandibular fractures and isolated fractures of the posterior and/or lateral walls of the maxillary sinus. The aim of this study was to determine whether there is a coincidence between these fracture patterns. METHODS Four hundred large volume cone beam computed tomography scans (CBCT) of patients with a fracture of the mandible between 2008 and 2013 were analyzed retrospectively. Patients with multiple midfacial fractures were excluded. The radiographic findings were correlated with epidemiological and clinical data of the patients such as gender, age, treatment methods, or complications. RESULTS The most frequent fracture sites of the mandible were the jaw angle, the parasymphysis region, and the condyle. Nineteen of the 400 patients (4.75%) had an isolated fracture of the lateral and/or posterior maxillary sinus. Odds-ratio analysis revealed a high tendency for significant correlation of condylar process fractures with isolated maxillary sinus fractures. Chi-square test demonstrated a P-value near statistical significance (P=.054). No other fracture site of the mandible could be associated with an isolated fracture of the maxillary sinus. CONCLUSION A condylar process fracture of the mandible after trauma without any further injury of the midface may be associated with an isolated fracture of the lateral and/or posterior maxillary sinus.
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Affiliation(s)
- Sebastian Blatt
- Department of Oral and Maxillofacial Surgery, University Medical Center of the Johannes Gutenberg-University of Mainz, Mainz, Germany
| | - Roman Rahimi-Nedjat
- Department of Oral and Maxillofacial Surgery, University Medical Center of the Johannes Gutenberg-University of Mainz, Mainz, Germany
| | - Keyvan Sagheb
- Department of Oral and Maxillofacial Surgery, University Medical Center of the Johannes Gutenberg-University of Mainz, Mainz, Germany
| | - Lisa Piechowiak
- Department of Oral and Maxillofacial Surgery, University Medical Center of the Johannes Gutenberg-University of Mainz, Mainz, Germany
| | - Christian Walter
- Department of Oral and Maxillofacial Surgery, University Medical Center of the Johannes Gutenberg-University of Mainz, Mainz, Germany.,Oral and Maxillofacial Surgery of the Mediplus Clinic, Mainz, Germany
| | - Dan Brüllmann
- Department of Oral Surgery and Oral Radiology, University Medical Centre of the Johannes Gutenberg-University of Mainz, Mainz, Germany.,Private Practice, Oral Surgery Weißliliengasse, Mainz, Germany
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Sagheb K, Blatt S, Kraft IS, Zimmer S, Rahimi-Nedjat RK, Al-Nawas B, Walter C. Outcome and cervical metastatic spread of squamous cell cancer of the buccal mucosa, a retrospective analysis of the past 25 years. J Oral Pathol Med 2017; 46:460-464. [PMID: 27935122 DOI: 10.1111/jop.12537] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/30/2016] [Indexed: 11/30/2022]
Abstract
OBJECTIVES Because of the low proportion of squamous cell carcinomas (SCCs) of the buccal mucosa within the carcinomas of the oral cavity in the Western population, data concerning metastatic pattern are sparse. Therefore, this retrospective study is focusing on the occurrence of cervical metastases (CM) and the overall outcome of this tumor entity. MATERIALS AND METHODS From January 1988 to October 2013, 113 patients were treated in the Department of Oral and Maxillofacial Surgery, Mainz, for an oral SCC of the cheek. Metastatic pattern and clinical parameters that are possibly associated with an increased risk for CM as well as overall outcome were analyzed. RESULTS The average follow-up was 48 months (range: 1-248 months). A total of 55 (49%) patients were female and 58 (51%) male, with an average age of 65 ± 13 years (♀68 ± 14 years; ♂63 ± 11 years). In total, 55% of the patients either smoked and/or consumed alcohol. In total, 34% of the patients had a stage III or IV tumor, with overall 23% having CM at the time of diagnosis. During the follow-up, 50% (n = 56) of the patients developed a relapse after 12 months (median). Tumor size (P = 0.002*) and grading (P < 0.001*) are significantly associated with the occurrence of CM. Metastases (P = 0.008*) and advanced tumor size (P = 0.018) had an influence on the survival, whereas the relapse had no significant influence (P = 0.928). Five-year survival rate was 80%. CONCLUSIONS SCC of the buccal mucosa shows aggressive behavior with a considerably high proportion of relapse. Since overall outcome is significantly decreased by the cervical metastatic pattern, a selective, ipsilateral neck dissection for this patient group is recommended as the primary management.
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Affiliation(s)
- Keyvan Sagheb
- Department of Oral and Maxillofacial Surgery - Plastic Surgery, University Medical Center of the Johannes Gutenberg-University Mainz, Mainz, Germany
| | - Sebastian Blatt
- Department of Oral and Maxillofacial Surgery - Plastic Surgery, University Medical Center of the Johannes Gutenberg-University Mainz, Mainz, Germany
| | - Ina Sophie Kraft
- Department of Oral and Maxillofacial Surgery - Plastic Surgery, University Medical Center of the Johannes Gutenberg-University Mainz, Mainz, Germany
| | - Stefanie Zimmer
- Department of Pathology, University Medical Center of the Johannes Gutenberg-University Mainz, Mainz, Germany
| | - Roman-Kia Rahimi-Nedjat
- Department of Oral and Maxillofacial Surgery - Plastic Surgery, University Medical Center of the Johannes Gutenberg-University Mainz, Mainz, Germany
| | - Bilal Al-Nawas
- Department of Oral and Maxillofacial Surgery - Plastic Surgery, University Medical Center of the Johannes Gutenberg-University Mainz, Mainz, Germany
| | - Christian Walter
- Department of Oral and Maxillofacial Surgery - Plastic Surgery, University Medical Center of the Johannes Gutenberg-University Mainz, Mainz, Germany
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Blatt S, Schroth M. Neonatal Sepsis: Clinical Considerations. JCS 2017. [DOI: 10.1055/s-0037-1603802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
AbstractUnspecific symptoms and rapid development of sepsis up to septic shock from systemic inflammatory response syndrome (SIRS) are well-known, important issues in neonatology. A common cause is the infection by Streptococcus agalactiae (Group B Streptococcus [GBS]) or Escherichia coli, which contributes significantly to neonatal morbidity and mortality. Whereas early-onset sepsis is normally derived from mother during birth, late-onset sepsis can be transmitted by the environment. Management of neonatal sepsis includes the maintenance of cardiovascular and pulmonary function besides antibiotic therapy. Due to the fact that until today, there are no reliable screening tests for detecting early sepsis, clinical assessment is considered to be of utmost importance.
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Affiliation(s)
- S. Blatt
- Neonatologie und Pädiatrische Intensivmedizin, Cnopf'sche Kinderklinik, Nürnberg, Germany
| | - M. Schroth
- Neonatologie und Pädiatrische Intensivmedizin, Cnopf'sche Kinderklinik, Nürnberg, Germany
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Pabst AM, Krüger M, Blatt S, Ziebart T, Rahimi-Nedjat R, Goetze E, Walter C. Angiogenesis in the Development of Medication-Related Osteonecrosis of the Jaws: An Overview. Dent J (Basel) 2016; 5:dj5010002. [PMID: 29563407 PMCID: PMC5806993 DOI: 10.3390/dj5010002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Revised: 11/24/2016] [Accepted: 12/20/2016] [Indexed: 12/30/2022] Open
Abstract
Medication-related osteonecrosis of the jaws (MR-ONJ) is one of the most relevant side effects of bisphosphonate therapy; it is clinically defined as a non-healing wound in combination with an avascular and necrotic jaw within ongoing bisphosphonate therapy or after completed bisphosphonate therapy. Different theories concerning the development of MR-ONJ have been reported, while the exact pathophysiology is still unknown. Recent studies have increasingly focused on angiogenesis and revascularization concerning MR-ONJ pathophysiology, which seems to be a relevant factor in the development of MR-ONJ and a possible and promising point of action for MR-ONJ prevention and therapy. Therefore, and with respect to the different aspects and specific forms of angiogenesis, the enclosed review summarizes the possible role of angiogenesis and revascularization in the pathophysiology of MR-ONJ. Special focus is given to the strong negative influence of bisphosphonates on progenitor and mature endothelial cells in vitro as well as on microvessel sprouting in vitro and in vivo, which might result in overall reduced wound healing of oral soft and hard tissues, and therefore in an exposed and avascular jaw from a clinical viewpoint. Further, it will be summarized whether and in what way the aspect of angiogenesis might be used for possible MR-ONJ prevention and therapy.
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Affiliation(s)
- Andreas Max Pabst
- Department of Oral- and Maxillofacial Surgery, General Armed Forces Hospital, Rübenacherstr. 170, 56072 Koblenz, Germany.
- Department of Oral- and Maxillofacial Surgery, University Medical Center Mainz, Augustusplatz 2, 55131 Mainz, Germany.
| | - Maximilian Krüger
- Department of Oral- and Maxillofacial Surgery, University Medical Center Mainz, Augustusplatz 2, 55131 Mainz, Germany.
| | - Sebastian Blatt
- Department of Oral- and Maxillofacial Surgery, University Medical Center Mainz, Augustusplatz 2, 55131 Mainz, Germany.
| | - Thomas Ziebart
- Department of Oral- and Maxillofacial Surgery, University Clinic, Georg-Voigt-Straße 3, 35039 Marburg, Germany.
| | - Roman Rahimi-Nedjat
- Department of Oral- and Maxillofacial Surgery, University Medical Center Mainz, Augustusplatz 2, 55131 Mainz, Germany.
| | - Elisabeth Goetze
- Department of Oral- and Maxillofacial Surgery, University Medical Center Mainz, Augustusplatz 2, 55131 Mainz, Germany.
| | - Christian Walter
- Department of Oral- and Maxillofacial Surgery, University Medical Center Mainz, Augustusplatz 2, 55131 Mainz, Germany.
- Oral and Maxillofacial Surgery, Mediplus Clinic, Haifa-Allee 20, 55128 Mainz, Germany.
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Ziebart T, Blatt S, Günther C, Voelxen N, Pabst A, Sagheb K, Kühl S, Lambrecht T. Erratum to: Significance of endothelial progenitor cells (EPC) for tumorigenesis of head and neck squamous cell carcinoma (HNSCC): possible marker of tumor progression and neovascularization? Clin Oral Investig 2016; 20:2301. [PMID: 27108343 DOI: 10.1007/s00784-016-1833-0] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Affiliation(s)
- Thomas Ziebart
- Department of Oral and Maxillofacial Surgery, University Medical Center Mainz, Augustusplatz 2, 55131, Mainz, Germany. .,Department of Oral Surgery, Oral Radiology and Oral Medicine, School of Dental Medicine, University of Basel, Basel, Switzerland.
| | - Sebastian Blatt
- Department of Oral and Maxillofacial Surgery, University Medical Center Mainz, Augustusplatz 2, 55131, Mainz, Germany
| | - Christian Günther
- Department of Oral and Maxillofacial Surgery, University Medical Center Mainz, Augustusplatz 2, 55131, Mainz, Germany
| | - Nadine Voelxen
- Institute of Physiology and Pathophysiology, University Medical Center Mainz, Mainz, Germany
| | - Andreas Pabst
- Department of Oral and Maxillofacial Surgery, University Medical Center Mainz, Augustusplatz 2, 55131, Mainz, Germany
| | - Keyvan Sagheb
- Department of Oral and Maxillofacial Surgery, University Medical Center Mainz, Augustusplatz 2, 55131, Mainz, Germany
| | - Sebastian Kühl
- Department of Oral Surgery, Oral Radiology and Oral Medicine, School of Dental Medicine, University of Basel, Basel, Switzerland
| | - Thomas Lambrecht
- Department of Oral Surgery, Oral Radiology and Oral Medicine, School of Dental Medicine, University of Basel, Basel, Switzerland
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Pabst AM, Krüger M, Sagheb K, Ziebart T, Jacobs C, Blatt S, Goetze E, Walter C. The influence of geranylgeraniol on microvessel sprouting after bisphosphonate substitution in an in vitro 3D-angiogenesis assay. Clin Oral Investig 2016; 21:771-778. [PMID: 27170294 DOI: 10.1007/s00784-016-1842-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2016] [Accepted: 04/24/2016] [Indexed: 12/26/2022]
Abstract
OBJECTIVES Recent studies focused on angiogenesis in the pathophysiology of bisphosphonate-associated osteonecrosis of the jaws (BP-ONJ) and identified geranylgeraniol (GGOH) as a feasible option for BP-ONJ therapy. This study investigated the influence of GGOH on microvessel sprouting after BP-incubation in vitro. MATERIALS AND METHODS Ten experimental set-ups were randomly designed in an in vitro 3D-angiogenesis assay. Two groups included HUVEC cell spheroids with and without (±) GGOH substitution as controls and eight groups pairwise contained either clodronate or the nitrogen-containing bisphosphonates (N-BP) ibandronate, pamidronate, and zoledronate ± GGOH. The size of the cell spheroids including the outbranching sprouts (SpS) as well as the density (SpD) and length of the sprouts (SpL) were analyzed by a grid system after 0, 24, 48, and 72 h. RESULTS For controls and NN-BP clodronate, no significant differences at any tested parameter and any point of measurement could be detected within the experimental set-ups ± GGOH (p each ≥0.05). For N-BP ibandronate, the experimental set-ups +GGOH showed a significantly increased SpS, SpD, and SpL after 48 and 72 h (p each ≤0.002) compared to the experimental set-ups -GGOH. For N-BPs pamidronate and zoledronate, the experimental set-ups + GGOH demonstrated a significantly increased SpS, SpD, and SpL after 24, 48, and 72 h (p each ≤0.001) compared to the experimental set-ups -GGOH. CONCLUSIONS The strong negative influence of N-BPs on microvessel sprouting could be significantly reversed by GGOH. CLINICAL RELEVANCE Since supportive therapeutic options for BP-ONJ are lacking, GGOH might be a promising substitute for BP-ONJ prevention and therapy.
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Affiliation(s)
- A M Pabst
- Department of Oral and Maxillofacial Surgery, Federal Armed Forces Hospital, Rübenacherstr, 170, 56072, Koblenz, Germany. .,Department of Oral and Maxillofacial Surgery, University Medical Center, Augustusplatz 2, 55131, Mainz, Germany.
| | - M Krüger
- Department of Oral and Maxillofacial Surgery, University Medical Center, Augustusplatz 2, 55131, Mainz, Germany
| | - K Sagheb
- Department of Oral and Maxillofacial Surgery, University Medical Center, Augustusplatz 2, 55131, Mainz, Germany
| | - T Ziebart
- Department of Oral and Maxillofacial Surgery, University Clinic, Georg-Voigt-Straße 3, 35039, Marburg, Germany
| | - C Jacobs
- Department of Orthodontics, University Medical Center, Augustusplatz 2, 55131, Mainz, Germany
| | - S Blatt
- Department of Oral and Maxillofacial Surgery, University Medical Center, Augustusplatz 2, 55131, Mainz, Germany
| | - E Goetze
- Department of Oral and Maxillofacial Surgery, University Medical Center, Augustusplatz 2, 55131, Mainz, Germany
| | - C Walter
- Department of Oral and Maxillofacial Surgery, University Medical Center, Augustusplatz 2, 55131, Mainz, Germany
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Blatt S, Ziebart T, Krüger M, Pabst AM. Diagnosing oral squamous cell carcinoma: How much imaging do we really need? A review of the current literature. J Craniomaxillofac Surg 2016; 44:538-49. [DOI: 10.1016/j.jcms.2016.02.003] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2015] [Revised: 01/28/2016] [Accepted: 02/04/2016] [Indexed: 12/11/2022] Open
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Affiliation(s)
- Daniel Greif
- Department of Physics, Harvard University, Cambridge, MA 02138, USA
| | | | - Anton Mazurenko
- Department of Physics, Harvard University, Cambridge, MA 02138, USA
| | - Christie S. Chiu
- Department of Physics, Harvard University, Cambridge, MA 02138, USA
| | - Sebastian Blatt
- Department of Physics, Harvard University, Cambridge, MA 02138, USA
| | - Florian Huber
- Department of Physics, Harvard University, Cambridge, MA 02138, USA
| | - Geoffrey Ji
- Department of Physics, Harvard University, Cambridge, MA 02138, USA
| | - Markus Greiner
- Department of Physics, Harvard University, Cambridge, MA 02138, USA
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Blatt S, Voelxen N, Sagheb K, Pabst AM, Walenta S, Schroeder T, Mueller-Klieser W, Ziebart T. Lactate as a predictive marker for tumor recurrence in patients with head and neck squamous cell carcinoma (HNSCC) post radiation: a prospective study over 15 years. Clin Oral Investig 2016; 20:2097-2104. [PMID: 26728026 DOI: 10.1007/s00784-015-1699-6] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2015] [Accepted: 12/17/2015] [Indexed: 01/08/2023]
Abstract
OBJECTIVES Lactate as a key regulator of the glycolytic phenotype has been recently described in fueling tumor growth and metastatic spread in head and neck squamous cell carcinoma (HNSCC). However, in context of tumor recurrence following adjuvant radiation, the underlying mechanisms remain uncertain. We therefore investigate the role of lactate towards radioresistance in HNSCC in this prospective study for the first time in vivo. MATERIALS AND METHODS Herein, we analyzed biopsies of primary squamous cell carcinoma after surgery and adjuvant irradiation in 17 patients. Tumor tissue levels of ATP, glucose, and lactate were detected using induced metabolic bioluminescence imaging (imBI) and correlated with clinical data within an observation period of up to 15 years. RESULTS High amounts of lactate levels in tumors of HNSCC are significantly negatively correlated with overall patient survival. Moreover, high expression of lactate in a primary tumor site is significantly correlated with tumor recurrence post radiation, whereas ATP and/or glucose showed no such correlation. CONCLUSION Lactate can be seen not only as a waste product of altered glycolytic metabolism but also as a key master of malignancy as well as resistance mechanism towards irradiation. CLINICAL RELEVANCE High expression of lactate levels in tumor tissue, obtained by metabolic bioluminescence imaging, may therefore serve as a predictor for overall and recurrence-free survival and could represent a future biomarker in the validation of adjuvant irradiation.
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Affiliation(s)
- Sebastian Blatt
- Department of Oral and Maxillofacial Surgery, University Medical Center of the Johannes Gutenberg-University of Mainz, 55131, Mainz, Germany.
| | - Nadine Voelxen
- Institute of Pathophysiology, University Medical Center of the Johannes Gutenberg-University of Mainz, 55128, Mainz, Germany
| | - Keyvan Sagheb
- Department of Oral and Maxillofacial Surgery, University Medical Center of the Johannes Gutenberg-University of Mainz, 55131, Mainz, Germany
| | - Andreas Max Pabst
- Department of Oral and Maxillofacial Surgery, University Medical Center of the Johannes Gutenberg-University of Mainz, 55131, Mainz, Germany.,Department of Oral and Maxillofacial Surgery, Federal Armed Forces Hospital Koblenz, Rübenacherstr. 170, 56072, Koblenz, Germany
| | - Stefan Walenta
- Institute of Pathophysiology, University Medical Center of the Johannes Gutenberg-University of Mainz, 55128, Mainz, Germany
| | - Thies Schroeder
- Department of Physical Chemistry, Johannes Gutenberg-University of Mainz, 55128, Mainz, Germany
| | - Wolfgang Mueller-Klieser
- Institute of Pathophysiology, University Medical Center of the Johannes Gutenberg-University of Mainz, 55128, Mainz, Germany
| | - Thomas Ziebart
- Department of Oral and Maxillofacial Surgery, University Medical Center of the Johannes Gutenberg-University of Mainz, 55131, Mainz, Germany
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Parsons MF, Huber F, Mazurenko A, Chiu CS, Setiawan W, Wooley-Brown K, Blatt S, Greiner M. Site-resolved imaging of fermionic ^{6}Li in an optical lattice. Phys Rev Lett 2015; 114:213002. [PMID: 26066433 DOI: 10.1103/physrevlett.114.213002] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2015] [Indexed: 05/16/2023]
Abstract
We demonstrate site-resolved imaging of individual fermionic ^{6}Li atoms in a single layer of a 3D optical lattice. To preserve the density distribution during fluorescence imaging, we simultaneously cool the atoms with 3D Raman sideband cooling. This laser cooling technique, demonstrated here for the first time for ^{6}Li atoms, also provides a pathway to rapid low-entropy filling of an optical lattice. We are able to determine the occupation of individual lattice sites with a fidelity >95%, enabling direct, local measurement of particle correlations in Fermi lattice systems. This ability will be instrumental for creating and investigating low-temperature phases of the Fermi-Hubbard model, including antiferromagnets and d-wave superfluidity.
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Affiliation(s)
- Maxwell F Parsons
- Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
| | - Florian Huber
- Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
| | - Anton Mazurenko
- Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
| | - Christie S Chiu
- Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
| | - Widagdo Setiawan
- Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
| | | | - Sebastian Blatt
- Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
| | - Markus Greiner
- Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
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42
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Lang G, Blatt S, Embree C, Grant J, Hoying S, Ingels C, Neilsen D, Neilsen G, Robinson T. DEVELOPING AND EVALUATING INTENSIVE SWEET CHERRY ORCHARD SYSTEMS: THE NC140 REGIONAL RESEARCH TRIAL. ACTA ACUST UNITED AC 2014. [DOI: 10.17660/actahortic.2014.1058.11] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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43
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Krüger M, Pabst A, Walter C, Sagheb K, Günther C, Blatt S, Weise K, Al-Nawas B, Ziebart T. The prevalence of human papilloma virus (HPV) infections in oral squamous cell carcinomas: A retrospective analysis of 88 patients and literature overview. J Craniomaxillofac Surg 2014; 42:1506-14. [DOI: 10.1016/j.jcms.2014.04.022] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Revised: 02/26/2014] [Accepted: 04/22/2014] [Indexed: 12/19/2022] Open
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Swallows M, Martin M, Bishof M, Benko C, Lin Y, Blatt S, Rey AM, Ye J. Operating a (87)Sr optical lattice clock with high precision and at high density. IEEE Trans Ultrason Ferroelectr Freq Control 2012; 59:416-425. [PMID: 22481774 DOI: 10.1109/tuffc.2012.2210] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We describe recent experimental progress with the JILA Sr optical frequency standard, which has a systematic uncertainty at the 10-(16) fractional frequency level. An upgraded laser system has recently been constructed in our lab which may allow the JILA Sr standard to reach the standard quantum measurement limit and achieve record levels of stability. To take full advantage of these improvements, it will be necessary to operate a lattice clock with a large number of atoms, and systematic frequency shifts resulting from atomic interactions will become increasingly important. We discuss how collisional frequency shifts can arise in an optical lattice clock employing fermionic atoms and describe a novel method by which such systematic effects can be suppressed.
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Affiliation(s)
- Matthew Swallows
- JILA, National Institute of Standards and Technology, Boulder, CO, and the University of Colorado, Boulder, CO, USA.
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45
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Blatt S, Nicholson TL, Bloom BJ, Williams JR, Thomsen JW, Julienne PS, Ye J. Measurement of optical Feshbach resonances in an ideal gas. Phys Rev Lett 2011; 107:073202. [PMID: 21902391 DOI: 10.1103/physrevlett.107.073202] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2011] [Indexed: 05/31/2023]
Abstract
Using a narrow intercombination line in alkaline earth atoms to mitigate large inelastic losses, we explore the optical Feshbach resonance effect in an ultracold gas of bosonic (88)Sr. A systematic measurement of three resonances allows precise determinations of the optical Feshbach resonance strength and scaling law, in agreement with coupled-channel theory. Resonant enhancement of the complex scattering length leads to thermalization mediated by elastic and inelastic collisions in an otherwise ideal gas. Optical Feshbach resonance could be used to control atomic interactions with high spatial and temporal resolution.
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Affiliation(s)
- S Blatt
- JILA and Department of Physics, NIST and University of Colorado, Boulder, 80309-0440, USA
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46
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Swallows MD, Bishof M, Lin Y, Blatt S, Martin MJ, Rey AM, Ye J. Suppression of Collisional Shifts in a Strongly Interacting Lattice Clock. Science 2011; 331:1043-6. [DOI: 10.1126/science.1196442] [Citation(s) in RCA: 125] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Affiliation(s)
- Matthew D. Swallows
- JILA, National Institute of Standards and Technology, and Department of Physics, University of Colorado, Boulder, CO 80309, USA
| | - Michael Bishof
- JILA, National Institute of Standards and Technology, and Department of Physics, University of Colorado, Boulder, CO 80309, USA
| | - Yige Lin
- JILA, National Institute of Standards and Technology, and Department of Physics, University of Colorado, Boulder, CO 80309, USA
- National Institute of Metrology, Beijing 100013, China
| | - Sebastian Blatt
- JILA, National Institute of Standards and Technology, and Department of Physics, University of Colorado, Boulder, CO 80309, USA
| | - Michael J. Martin
- JILA, National Institute of Standards and Technology, and Department of Physics, University of Colorado, Boulder, CO 80309, USA
| | - Ana Maria Rey
- JILA, National Institute of Standards and Technology, and Department of Physics, University of Colorado, Boulder, CO 80309, USA
| | - Jun Ye
- JILA, National Institute of Standards and Technology, and Department of Physics, University of Colorado, Boulder, CO 80309, USA
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47
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Blatt S, Zuroff D, Bondi C, Sanislow C. Short- and long-term effects of medication and psychotherapy in the brief treatment of depression: further analyses of data from the NIMH TDCRP. Psychother Res 2010; 10:215-34. [DOI: 10.1080/713663676] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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48
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Swallows MD, Campbell GK, Ludlow AD, Boyd MM, Thomsen JW, Martin MJ, Blatt S, Nicholson TL, Ye J. Precision measurement of fermionic collisions using an 87Sr optical lattice clock with 1 x 10(-16) inaccuracy. IEEE Trans Ultrason Ferroelectr Freq Control 2010; 57:574-582. [PMID: 20211772 DOI: 10.1109/tuffc.2010.1449] [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] [Indexed: 05/28/2023]
Abstract
We describe recent progress on the JILA Sr optical frequency standard, which has a systematic uncertainty at the 10(¿16) fractional frequency level. The dominant contributions to the systematic error are from blackbody radiation shifts and collisional shifts. We discuss the blackbody radiation shift and propose measurements and experimental protocols that should reduce its systematic contribution. We discuss how collisional frequency shifts can arise in an optical lattice clock employing fermionic atoms, and experimentally demonstrate how the uncertainty in this density-dependent correction to the clock frequency is reduced.
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Affiliation(s)
- Matthew D Swallows
- JILA, the National Institute of Standards and Technology, and the University of Colorado, Boulder, CO, USA.
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Campbell GK, Boyd MM, Thomsen JW, Martin MJ, Blatt S, Swallows MD, Nicholson TL, Fortier T, Oates CW, Diddams SA, Lemke ND, Naidon P, Julienne P, Ye J, Ludlow AD. Probing Interactions Between Ultracold Fermions. Science 2009; 324:360-3. [DOI: 10.1126/science.1169724] [Citation(s) in RCA: 89] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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50
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Blatt S, Ludlow AD, Campbell GK, Thomsen JW, Zelevinsky T, Boyd MM, Ye J, Baillard X, Fouché M, Le Targat R, Brusch A, Lemonde P, Takamoto M, Hong FL, Katori H, Flambaum VV. New limits on coupling of fundamental constants to gravity using 87Sr optical lattice clocks. Phys Rev Lett 2008; 100:140801. [PMID: 18518019 DOI: 10.1103/physrevlett.100.140801] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2008] [Indexed: 05/26/2023]
Abstract
The 1S0-3P0 clock transition frequency nuSr in neutral 87Sr has been measured relative to the Cs standard by three independent laboratories in Boulder, Paris, and Tokyo over the last three years. The agreement on the 1 x 10(-15) level makes nuSr the best agreed-upon optical atomic frequency. We combine periodic variations in the 87Sr clock frequency with 199Hg+ and H-maser data to test local position invariance by obtaining the strongest limits to date on gravitational-coupling coefficients for the fine-structure constant alpha, electron-proton mass ratio mu, and light quark mass. Furthermore, after 199Hg+, 171Yb+, and H, we add 87Sr as the fourth optical atomic clock species to enhance constraints on yearly drifts of alpha and mu.
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Affiliation(s)
- S Blatt
- JILA, National Institute of Standards and Technology and University of Colorado, Department of Physics, University of Colorado, Boulder, Colorado, 80309-0440, USA.
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