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Use of modified hollow fiber materials for removing exotoxins produced by escherichia coli from liquids, preferably from blood and plasma as well as their use for treating concomitant diseases

A technology of Escherichia coli and fiber materials, applied in blood circulation treatment, blood filtration, chemical instruments and methods, etc., can solve problems such as expensive treatment costs

Active Publication Date: 2014-06-04
SAFE BT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This plasma exchange requires approximately 12 liters of plasma per patient, which requires a large number of donors and may be associated with a higher risk of other infections and allergies
In addition, plasma exchange therapy involves expensive treatment costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Example 1: Removal of Shiga toxins by selective adsorption under in vitro conditions

[0050] A) Preparation of Shiga toxin

[0051] To prepare and enrich Shiga toxin, E. coli EHEC O104 was cultured overnight in a medium containing: NaCl (10 g / L), tryptone (Triptone, 10 g / L, Becton Dickinson) and yeast extract (5 g / L, Becton Dickinson). After centrifugation of the suspension (200 g, 30 min) and sedimentation of E. coli, a Shiga toxin 2 (Stx2) highly concentrated supernatant was obtained. The concentration of Stx2 corresponds to an "optical density" (OD450 / 620) of 4.06. This value was determined by using a dedicated ELISA detection kit (Premier EHEC, Meridian Bioscience).

[0052] B) Perfusion of Shiga toxin solution through S.A.F.E.bt adsorption device (B.BraunMelsungen AG)

[0053] An aliquot of the supernatant containing Stx2 diluted 1:2 was obtained according to the method described in A). The solution was perfused separately through the S.A.F.E.bt sorption uni...

Embodiment 2

[0056]Example 2: Preventive treatment of EHEC

[0057] The present case is a 17-year-old boy who suffered from bloody diarrhea for 3 days and whose stool was positive for EHEC. Hemolytic uremic syndrome (HUS) was not confirmed at the time. Four days after his first episode of diarrhea (on June 21, 2011), the patient was treated with the SAFE-system. The duration of treatment is 2 hours. The treatment did not produce any complications and was well tolerated by the patient. After treatment and in the following days, diarrhea did not occur. Shiga toxin was no longer detectable in the stool, and the patient could be discharged after a few days without showing any symptoms. At a follow-up examination on July 7, 2011, no EHEC bacteria were detected and the patient's results were normal.

Embodiment 3

[0058] Example 3: Therapeutic Treatment of EHEC / HUS Syndrome

[0059] This case is a 74-year-old woman from Hannover. The patient was in good health and had sudden onset (nonbloody) diarrhea that lasted for 4 days. On June 16, 2011, she was transferred from the hospital in Lehrte to the Oststadt-Heidehaus clinic in Hannover because of acute renal failure with coagulation-like HUS syndrome.

[0060] On admission on June 16, 2011, the patient was conscious and responsive. However, the patient was "anxious and forgetful," according to the admission physician's description of his neurological condition. On admission, the patient's laboratory parameters showed a creatine concentration of 7.2 mg / dl, a urea concentration of 220 mg / dl, a platelet concentration of 115 T / ml, and a lactate dehydrogenase of 1460 U / L.

[0061] Between June 16, 2011, and June 22, 2011, the patient was on acute dialysis in the intensive care unit and, due to EHEC-HUS syndrome that was documented during th...

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PUM

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Abstract

The present invention relates to chemically modified hollow fiber materials for extracorporeally removing exotoxins produced by pathogenic Escherichia coli from protein containing liquids, particularly from blood or plasma, as well as the use in treating patients suffering from diseases which, for example, are caused by enterohemorrhagic Escherichia coli bacteria (EHEC infections) or other pathogenic Escherichia coli like enterotoxigenic Escherichia coli (ETEC) or enteroaggregative Escherichia coli (EAEC).

Description

technical field [0001] The present invention relates to chemically modified hollow fiber materials for the in vitro removal of exotoxins produced by pathogenic E. Use in patients with diseases caused by Bacillus bacteria (EHEC infection) or other pathogenic Escherichia coli such as enterotoxic Escherichia coli (ETEC) or enteroaggregative Escherichia coli (EAEC). Background technique [0002] Shiga toxin (also known as Shiga-like or Vero toxin) produced by Escherichia coli (STEC bacteria) was described in 1977 (Konowalchuk et al., Infect Immun, 1977, 18:775-779), but it was not described until 1983. Linked to hemolytic uremic syndrome (HUS) (Karmali et al., Lancet, 1983, 2:619-20). Since then, STEC infection has been shown to be a major cause of acute renal failure, especially in children. It has been recognized until now that once HUS has developed, its treatment is very difficult (Thorpe CM, Food Safety CID. 2004, 38:1298-1303). Therefore, research efforts have mainly fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J41/04B01J41/12B01J47/12A61M1/36B01J20/28B01J20/32B01D69/08B01D67/00
CPCA61M1/3679B01J20/3248B01D71/78B01J41/125B01J20/3272B01D67/0093B01D69/08B01J47/123B01D2323/38A61M1/36A61M1/34B01J41/04B01J20/28023F04C2270/0421B01J41/13B01J47/127A61M1/3403B01D67/00931
Inventor D·赛德尔B·R·耶格尔
Owner SAFE BT INC
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