1
|
Fischer S, Mueller W, Schulte M, Kiefer J, Hirche C, Heimer S, Köllensperger E, Germann G, Reichenberger MA. Multiple extracorporeal shock wave therapy degrades capsular fibrosis after insertion of silicone implants. ULTRASOUND IN MEDICINE & BIOLOGY 2015; 41:781-789. [PMID: 25619782 DOI: 10.1016/j.ultrasmedbio.2014.10.018] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2014] [Revised: 10/22/2014] [Accepted: 10/24/2014] [Indexed: 06/04/2023]
Abstract
Capsular fibrosis is the most frequent long-term complication after insertion of silicone devices. Today, mainly direct immunostimulation and subclinical infection are held responsible for inducing and maintaining inflammatory reactions, which lead to overwhelming extracellular matrix formation. Extracorporeal shock waves (ESWs) are capable of inhibiting inflammatory processes and revealing antibacterial capacity. In our previous study, we observed decelerated capsule development after application of a single shock wave immediately after surgery. The purpose of this study was to evaluate the effects of multiple ESWT after insertion of silicone implants in the same rodent model. Therefore, silicone prostheses were inserted into a submuscular pocket in 12 additional male Lewis rats, and shock waves were administered over a 14-d interval. At 35 d (n = 6) and 100 d (n = 6) after insertion, silicone implants and surrounding capsule tissue were removed and prepared for histologic and immunohistochemical analysis, as well as polymerase chain reaction (Ccl2, CD68, transforming growth factor β1, matrix metalloproteinase 2). Compared with the control group, multiple ESWT had no effect on day 35, but resulted in a significantly thinner capsule on day 100 (825.8 ± 313.2 vs. 813.3 ± 47.9, p = 0.759, and 1062.3 ± 151.9 vs. 495.4 ± 220.4, p < 0.001, respectively). The capsule was even thinner than after a single shock wave application, which had been found to result in thinner capsules at every time point in our previous study. This active degradation of the fibrous envelope caused by multiple ESWs was accompanied by synergistic alterations in pro- and anti-fibrotic proteins (transforming growth factor β1 and matrix metalloproteinase 2, respectively). In conclusion, after insertion of silicone devices, single ESWT is capable of decelerating capsule formation in contrast to multiple ESWT, which degrades fibrotic tissue. These findings seem to be associated with inhibition of inflammation and beneficial effects on pro- and anti-fibrotic proteins.
Collapse
Affiliation(s)
- Sebastian Fischer
- BG Trauma Centre Ludwigshafen, Clinic for Hand, Plastic and Reconstructive Surgery, Burn Centre, Hand and Plastic Surgery of the University of Heidelberg, Heidelberg, Germany.
| | - Wolf Mueller
- University Hospital Leipzig, Department of Neuropathology, University of Leipzig, Leipzig, Germany
| | - Matthias Schulte
- BG Trauma Centre Ludwigshafen, Clinic for Hand, Plastic and Reconstructive Surgery, Burn Centre, Hand and Plastic Surgery of the University of Heidelberg, Heidelberg, Germany
| | - Jurij Kiefer
- BG Trauma Centre Ludwigshafen, Clinic for Hand, Plastic and Reconstructive Surgery, Burn Centre, Hand and Plastic Surgery of the University of Heidelberg, Heidelberg, Germany
| | - Christoph Hirche
- BG Trauma Centre Ludwigshafen, Clinic for Hand, Plastic and Reconstructive Surgery, Burn Centre, Hand and Plastic Surgery of the University of Heidelberg, Heidelberg, Germany
| | - Sina Heimer
- ETHIANUM-Clinic for Plastic and Reconstructive Surgery, Aesthetic and Preventive Medicine at Heidelberg University Hospital, Heidelberg, Germany
| | - Eva Köllensperger
- ETHIANUM-Clinic for Plastic and Reconstructive Surgery, Aesthetic and Preventive Medicine at Heidelberg University Hospital, Heidelberg, Germany
| | - Günter Germann
- ETHIANUM-Clinic for Plastic and Reconstructive Surgery, Aesthetic and Preventive Medicine at Heidelberg University Hospital, Heidelberg, Germany
| | - Matthias A Reichenberger
- ETHIANUM-Clinic for Plastic and Reconstructive Surgery, Aesthetic and Preventive Medicine at Heidelberg University Hospital, Heidelberg, Germany
| |
Collapse
|
2
|
Skåra T, Valdramidis VP, Rosnes JT, Noriega E, Van Impe JF. A novel model to assess the efficacy of steam surface pasteurization of cooked surimi gels inoculated with realistic levels of Listeria innocua. Food Microbiol 2014; 44:64-70. [DOI: 10.1016/j.fm.2014.05.018] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2013] [Revised: 04/29/2014] [Accepted: 05/25/2014] [Indexed: 11/26/2022]
|
3
|
New developments in shockwave technology intended for meat tenderization: Opportunities and challenges. A review. Meat Sci 2013; 95:931-9. [PMID: 23660173 DOI: 10.1016/j.meatsci.2013.04.039] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2013] [Revised: 04/09/2013] [Accepted: 04/10/2013] [Indexed: 11/21/2022]
Abstract
Meat tenderness is an important quality parameter determining consumer acceptance and price. Meat tenderness is difficult to ensure in the global meat chain because the production systems are not always aiming at this purpose (ex.: cattle derived from milk production) and by the existence within the carcass of "tough" primals. Different methods can be used by the meat industry to improve meat tenderness each with its advantages and drawbacks. The application of hydrodynamic pressure or shockwaves has showed outstanding improvements by reducing the Warner Bratzler Shear Force by 25% or more. However, the technology has not penetrated into the market as first systems were based on the use of explosives and further developments seemed to lack the robustness to fulfill industrial requirements. The present paper describes the main challenges to construct a prototype for the continuous treatment of meat by shockwaves based on electrical discharges under water. Finally, improvements on the tenderness of meat by using the novel prototype are presented.
Collapse
|
4
|
Luchansky JB, Porto-Fett ACS, Shoyer B, Phebus RK, Thippareddi H, Call JE. Thermal inactivation of Escherichia coli O157:H7 in blade-tenderized beef steaks cooked on a commercial open-flame gas grill. J Food Prot 2009; 72:1404-11. [PMID: 19681262 DOI: 10.4315/0362-028x-72.7.1404] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Beef subprimals were inoculated on the lean side with ca. 4.0 log CFU/g of a cocktail of rifampin-resistant (Rif(r)) Escherichia coli O157:H7 strains and then passed once through a mechanical blade tenderizer with the lean side facing upward. Inoculated subprimals that were not tenderized served as controls. Two core samples were removed from each of three tenderized subprimals and cut into six consecutive segments starting from the inoculated side. A total of six cores were also obtained from control subprimals, but only segment 1 (topmost) was sampled. Levels of E. coli O157:H7 recovered from segment 1 were 3.81 log CFU/g for the control subprimals and 3.36 log CFU/g for tenderized subprimals. The percentage of cells recovered in segment 2 was ca. 25-fold lower than levels recovered from segment 1, but E. coli O157:H7 was recovered from all six segments of the cores obtained from tenderized subprimals. In phase II, lean-side-inoculated (ca. 4.0 log CFU/g), single-pass tenderized subprimals were cut into steaks of various thicknesses (1.91 cm [0.75 in.], 2.54 cm [1.0 in.], and 3.18 cm [1.25 in.]) that were subsequently cooked on a commercial open-flame gas grill to internal temperatures of 48.8 degrees C (120 degrees F), 54.4 degrees C (130 degrees F), and 60 degrees C (140 degrees F). In general, regardless of temperature or thickness, we observed about a 2.6- to 4.2-log CFU/g reduction in pathogen levels following cooking. These data validate that cooking on a commercial gas grill is effective at eliminating relatively low levels of the pathogen that may be distributed throughout a blade-tenderized steak.
Collapse
Affiliation(s)
- John B Luchansky
- U.S. Department of Agriculture, Agricultural Research Service, Eastern Regional Research Center, Microbial Food Safety Research Unit, 600 East Mermaid Lane, Wyndmoor, Pennsylvania 19038, USA.
| | | | | | | | | | | |
Collapse
|
5
|
Lorca TA, Claus JR, Eifert JD, Marcy JE, Sumner SS. Penetration of surface-inoculated bacteria as a result of electrically generated hydrodynamic shock wave treatment of boneless skinless chicken breasts. Poult Sci 2003; 82:1205-10. [PMID: 12872981 DOI: 10.1093/ps/82.7.1205] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The top surface of boneless skinless chicken breasts was inoculated with either green fluorescent protein (GFP)-labeled Escherichia coli (E. coli-GFP) or rifampicin-resistant E. coli (E. coli-Rif) and subjected to electrically generated hydrodynamic shock wave treatment (HVADH). Cryostat sampling in concert with laser scanning confocal microscopy or plating onto antibiotic selective agar was used to determine if HVADH treatment resulted in the movement of the inoculated bacteria from the outer inoculated surface to the interior of intact boneless skinless chicken breasts. In HVADH-treated boneless skinless chicken breasts, marker bacteria were detected within the first 200 microm below the inoculated surface, 50 to 100 microm beyond the depth of untreated surface inoculated boneless skinless chicken breasts. The exact depth at which the marker bacteria were found was dependent on the cryostat sampling distance used. These results suggest that HVADH treatments affect the movement of surface bacteria.
Collapse
Affiliation(s)
- T A Lorca
- Department of Food Science and Technology, Virginia Tech, Blacksburg, Virginia 24061, USA.
| | | | | | | | | |
Collapse
|
6
|
SCHILLING MW, MARRIOTT NG, WANG H, SOLOMON MB. CHARACTERISTICS OF USDA UTILITY COW BEEF SUBJECTED TO BLADE TENDERIZATION AND HYDRODYNAMIC SHOCK WAVES. ACTA ACUST UNITED AC 2003. [DOI: 10.1111/j.1745-4573.2003.tb00695.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|