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Polyethylene terephthalate and its monomers degradation by Ideonella sakaiensis

ABSTRACT: Synthetic plastics, like polyethylene terephthalate (PET), have become an essential part of modern life. Many of these products are remarkably persistent in the environment, and the accumulation in the environment is recognised as a major threat. Therefore, an increasing interest has been paid to screen for organisms able to degrade and assimilate the plastic. Ideonella sakaiensis was isolated from a plastisphere, a bacterium that solely was thriving on the degradation on PET films. The processes affected by the presence of PET, terephthalic acid, ethylene glycol, ethyl glycolate, and sodium glyoxylate monohydrate was elucidated by differential proteomes. The exposure of PET and its monomers seem to affect two major pathways, the TCA cycle and the β-oxidation pathway, since multiple of the conditions resulted in an increased expression of proteins directly or indirectly involved in these pathways, underlying the importance in the degradation of PET by I. sakaiensis.

INSTRUMENT(S): Q Exactive HF

ORGANISM(S): Ideonella Sakaiensis

SUBMITTER: Jan Struckmann Poulsen

LAB HEAD: Jeppe Lund Nielsen

PROVIDER: PXD035497 | Pride | 2023-04-04

REPOSITORIES: Pride

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Project description:BACKGROUND:; Osteonecrosis of the jaw (ONJ) has been reported in patients with a history of aminobisphosphonate use. METHODS:; In order to define ONJ and gain insights into its pathophysiology, clinical, radiographic, biochemical, and microarray profiling studies were conducted in 11 patients with multiple myeloma (MM) and ONJ. RESULTS:; Eleven patients between the ages of 57 and 81 yrs were treated with either pamidronate (n=3), zoledronate (n=4), or both agents sequentially (n=4) for a mean of 38.7 months. Radiographic studies demonstrated radiolucency and sclerosis on plain films. Functional imaging with positron emission tomography (PET) demonstrated a visual increase in glucose metabolism and mineralization at sites of ONJ, using fluorodeoxyglucose (FDG) and sodium fluoride (NaF), respectively. Quantitative regional analysis confirmed an increased standardized uptake value (SUVmax) in areas of ONJ. The target to background ratio of SUVmax was significantly greater for NaF-PET than FDG-PET scans, suggesting that NaF-PET may provide superior image quality for identifying ONJ. Transcriptional profiling of peripheral blood mononuclear cells (PBMCs) using the Affymetrix U133Plus 2.0 gene chip in all 11 MM patients compared with 10 age matched MM controls and 5 healthy volunteers demonstrated that genes involved in osteoblast and osteoclast signaling cascades were significantly downregulated in patients with ONJ, as were proteins confirmed by ELISA. CONCLUSIONS:; ONJ is seen in patients with a history of aminobisphosphonate use. Functional imaging with NaF PET confirms the diagnosis of ONJ. Gene and protein studies are consistent with altered bone remodeling, evidenced by suppression of both bone resorption and formation. Experiment Overall Design: Transcriptional profiling of peripheral blood mononuclear cells (PBMCs) was performed using the Affymetrix U133Plus 2.0 Gene Chip (Affymetrix, Santa Clara, CA, USA) in 11 patients with osteonecrosis of the jaw and multiple myeloma and compared with the profiles of the 10 myeloma patients on bisphosphonate therapy without osteonecrosis of the jaw and 5 healthy volunteers.

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	1+_JSP_JLN_UPLIFT.raw	Raw
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	2+_JSP_JLN_UPLIFT.raw	Raw
	2_JSP_JLN_UPLIFT.raw	Raw
	3+_JSP_JLN_UPLIFT.raw	Raw

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Polyethylene terephthalate and its monomers degradation by Ideonella sakaiensis

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