TY  - JOUR
A1  - Projahn, Delia
A1  - Simsekyilmaz, Sakine
A1  - Singh, Smriti
A1  - Kanzler, Isabella
A1  - Kramp, Birgit K.
A1  - Langer, Marcella
A1  - Burlacu, Alexandrina
A1  - Bernhagen, Jürgen
A1  - Klee, Doris
A1  - Zernecke, Alma
A1  - Hackeng, Tilman M.
A1  - Groll, Jürgen
A1  - Weber, Christian
A1  - Liehn, Elisa A.
A1  - Koenen, Roy R.
T1  - Controlled intramyocardial release of engineered chemokines by biodegradable hydrogels as a treatment approach of myocardial infarction
JF  - Journal of Cellular and Molecular Medicine
N2  - Myocardial infarction (MI) induces a complex inflammatory immune response, followed by the remodelling of the heart muscle and scar formation. The rapid regeneration of the blood vessel network system by the attraction of hematopoietic stem cells is beneficial for heart function. Despite the important role of chemokines in these processes, their use in clinical practice has so far been limited by their limited availability over a long time-span in vivo. Here, a method is presented to increase physiological availability of chemokines at the site of injury over a defined time-span and simultaneously control their release using biodegradable hydrogels. Two different biodegradable hydrogels were implemented, a fast degradable hydrogel (FDH) for delivering Met-CCL5 over 24hrs and a slow degradable hydrogel (SDH) for a gradual release of protease-resistant CXCL12 (S4V) over 4weeks. We demonstrate that the time-controlled release using Met-CCL5-FDH and CXCL12 (S4V)-SDH suppressed initial neutrophil infiltration, promoted neovascularization and reduced apoptosis in the infarcted myocardium. Thus, we were able to significantly preserve the cardiac function after MI. This study demonstrates that time-controlled, biopolymer-mediated delivery of chemokines represents a novel and feasible strategy to support the endogenous reparatory mechanisms after MI and may compliment cell-based therapies.
KW  - chemokines
KW  - therapy
KW  - cardiovascular pharmacology
KW  - remodelling
KW  - endothelial progenitor cells
KW  - left-ventricular function
KW  - heart-failure
KW  - rat model
KW  - recruitment
KW  - factor-I
Y1  - 2014
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-116597
SN  - 1582-4934
VL  - 18
IS  - 5
ER  - 
TY  - JOUR
A1  - Rittner, Heike L.
A1  - Wang, Ying
A1  - Gehringer, Rebekka
A1  - Mousa, Shaaban A.
A1  - Hackel, Dagmar
A1  - Brack, Alexander
T1  - CXCL10 Controls Inflammatory Pain via Opioid Peptide- Containing Macrophages in Electroacupuncture
N2  - Acupuncture is widely used for pain treatment in patients with osteoarthritis or low back pain, but molecular mechanisms remain largely enigmatic. In the early phase of inflammation neutrophilic chemokines direct opioid-containing neutrophils in the inflamed tissue and stimulate opioid peptide release and antinociception. In this study the molecular pathway and neuroimmune connections in complete Freund's adjuvant (CFA)-induced hind paw inflammation and electroacupuncture for peripheral pain control were analyzed. Free moving Wistar rats with hind paw inflammation were treated twice with electroacupuncture at GB30 (Huan Tiao - gall bladder meridian) (day 0 and 1) and analyzed for mechanical and thermal nociceptive thresholds. The cytokine profiles as well as the expression of opioid peptides were quantified in the inflamed paw. Electroacupuncture elicited long-term antinociception blocked by local injection of anti-opioid peptide antibodies (beta-endorphin, met-enkephalin, dynorphin A). The treatment altered the cytokine profile towards an anti-inflammatory pattern but augmented interferon (IFN)-gamma and the chemokine CXCL10 (IP-10: interferon gamma-inducible protein) protein and mRNA expression with concomitant increased numbers of opioid peptide-containing CXCR3+ macrophages. In rats with CFA hind paw inflammation without acupuncture repeated injection of CXCL10 triggered opioid-mediated antinociception and increase opioid-containing macrophages. Conversely, neutralization of CXCL10 time-dependently decreased electroacupuncture-induced antinociception and the number of infiltrating opioid peptide-expressing CXCR3+ macrophages. In summary, we describe a novel function of the chemokine CXCL10 - as a regulator for an increase of opioid-containing macrophages and antinociceptive mediator in inflammatory pain and as a key chemokine regulated by electroacupuncture.
KW  - opioids
KW  - inflammation
KW  - macrophages
KW  - cytokines
KW  - chemokines
KW  - enzyme-linkes immunoassays
KW  - acupuncture
KW  - analysis of variance
Y1  - 2014
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-112979
ER  -