TY  - JOUR
A1  - Kämmerer, Peer W.
A1  - Tribius, Silke
A1  - Cohrs, Lena
A1  - Engler, Gabriel
A1  - Ettl, Tobias
A1  - Freier, Kolja
A1  - Frerich, Bernhard
A1  - Ghanaati, Shahram
A1  - Gosau, Martin
A1  - Haim, Dominik
A1  - Hartmann, Stefan
A1  - Heiland, Max
A1  - Herbst, Manuel
A1  - Hoefert, Sebastian
A1  - Hoffmann, Jürgen
A1  - Hölzle, Frank
A1  - Howaldt, Hans-Peter
A1  - Kreutzer, Kilian
A1  - Leonhardt, Henry
A1  - Lutz, Rainer
A1  - Moergel, Maximilian
A1  - Modabber, Ali
A1  - Neff, Andreas
A1  - Pietzka, Sebastian
A1  - Rau, Andrea
A1  - Reichert, Torsten E.
A1  - Smeets, Ralf
A1  - Sproll, Christoph
A1  - Steller, Daniel
A1  - Wiltfang, Jörg
A1  - Wolff, Klaus-Dietrich
A1  - Kronfeld, Kai
A1  - Al-Nawas, Bilal
T1  - Adjuvant radiotherapy in patients with squamous cell carcinoma of the oral cavity or oropharynx and solitary ipsilateral lymph node metastasis (pN1) — a prospective multicentric cohort study
JF  - Cancers
N2  - (1) Background: Evaluation of impact of adjuvant radiation therapy (RT) in patients with oral squamous cell carcinoma of the oral cavity/oropharynx (OSCC) of up to 4 cm (pT1/pT2) and solitary ipsilateral lymph node metastasis (pN1). A non-irradiated group with clinical follow-up was chosen for control, and survival and quality of life (QL) were compared; (2) Methods: This prospective multicentric comprehensive cohort study included patients with resected OSCC (pT1/pT2, pN1, and cM0) who were allocated into adjuvant radiation therapy (RT) or observation. The primary endpoint was overall survival. Secondary endpoints were progression-free survival and QL after surgery; (3) Results: Out of 27 centers, 209 patients were enrolled with a median follow-up of 3.4 years. An amount of 137 patients were in the observation arm, and 72 received adjuvant irradiation. Overall survival did not differ between groups (hazard ratio (HR) 0.98 [0.55–1.73], p = 0.94). There were fewer neck metastases (HR 0.34 [0.15–0.77]; p = 0.01), as well as fewer local recurrences (HR 0.41 [0.19–0.89]; p = 0.02) under adjuvant RT. For QL, irradiated patients showed higher values for the symptom scale pain after 0.5, two, and three years (all p < 0.05). After six months and three years, irradiated patients reported higher symptom burdens (impaired swallowing, speech, as well as teeth-related problems (all p < 0.05)). Patients in the RT group had significantly more problems with mouth opening after six months, one, and two years (p < 0.05); (4) Conclusions: Adjuvant RT in patients with early SCC of the oral cavity and oropharynx does not seem to influence overall survival, but it positively affects progression-free survival. However, irradiated patients report a significantly decreased QL up to three years after therapy compared to the observation group.
KW  - oral squamous cell carcinoma
KW  - oropharyngeal carcinoma
KW  - surgery
KW  - resection
KW  - radiotherapy
KW  - survival
KW  - progression-free survival
KW  - quality of life
KW  - prospective
KW  - multicentric
KW  - lymph node
KW  - pN1
Y1  - 2023
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-311024
SN  - 2072-6694
VL  - 15
IS  - 6
ER  - 
TY  - JOUR
A1  - Korkmaz, Yüksel
A1  - Puladi, Behrus
A1  - Galler, Kerstin
A1  - Kämmerer, Peer W.
A1  - Schröder, Agnes
A1  - Gölz, Lina
A1  - Sparwasser, Tim
A1  - Bloch, Wilhelm
A1  - Friebe, Andreas
A1  - Deschner, James
T1  - Inflammation in the human periodontium induces downregulation of the α\(_1\)- and β\(_1\)-subunits of the sGC in cementoclasts
JF  - International Journal of Molecular Sciences
N2  - Nitric oxide (NO) binds to soluble guanylyl cyclase (sGC), activates it in a reduced oxidized heme iron state, and generates cyclic Guanosine Monophosphate (cGMP), which results in vasodilatation and inhibition of osteoclast activity. In inflammation, sGC is oxidized and becomes insensitive to NO. NO- and heme-independent activation of sGC requires protein expression of the α\(_1\)- and β\(_1\)-subunits. Inflammation of the periodontium induces the resorption of cementum by cementoclasts and the resorption of the alveolar bone by osteoclasts, which can lead to tooth loss. As the presence of sGC in cementoclasts is unknown, we investigated the α\(_1\)- and β\(_1\)-subunits of sGC in cementoclasts of healthy and inflamed human periodontium using double immunostaining for CD68 and cathepsin K and compared the findings with those of osteoclasts from the same sections. In comparison to cementoclasts in the healthy periodontium, cementoclasts under inflammatory conditions showed a decreased staining intensity for both α\(_1\)- and β\(_1\)-subunits of sGC, indicating reduced protein expression of these subunits. Therefore, pharmacological activation of sGC in inflamed periodontal tissues in an NO- and heme-independent manner could be considered as a new treatment strategy to inhibit cementum resorption.
KW  - nitric oxide
KW  - soluble guanylyl cyclase
KW  - cGMP
KW  - cementoclasts
KW  - cementum
KW  - osteoclasts
KW  - alveolar bone
KW  - periodontitis
Y1  - 2021
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-285783
SN  - 1422-0067
VL  - 22
IS  - 2
ER  -