OBJECTIVE: Transgenic mice with fluorescent protein (FP) reporters take full advantage of new in vivo imaging technologies. Therefore, we generated a TRPC5- and a TRPA1-reporter mouse based on FP C-terminal fusion, providing us with better alternatives for studying the physiology, interaction and coeffectors of these two TRP channels at the cellular and tissue level. METHODS: We generated transgenic constructs of the murine TRPC5- and TRPA1-gene with a 3*GGGGS linker and C-terminal fusion to mCherry and mTagBFP, respectively. We microinjected zygotes to generate reporter mice. Reporter mice were examined for visible fluorescence in trigeminal ganglia with two-photon microscopy, immunohistochemistry and calcium imaging. RESULTS: Both TRPC5-mCherry and TRPA1-mTagBFP knock-in mouse models were successful at the DNA and RNA level. However, at the protein level, TRPC5 resulted in no mCherry fluorescence. In contrast, sensory neurons derived from the TRPA1-reporter mice exhibited visible mTag-BFP fluorescence, although TRPA1 had apparently lost its ion channel function. CONCLUSIONS: Creating transgenic mice with a TRP channel tagged at the C-terminus with a FP requires detailed investigation of the structural and functional consequences in a given cellular context and fine-tuning the design of specific constructs for a given TRP channel subtype. Different degrees of functional impairment of TRPA1 and TRPC5 constructs suggest a specific importance of the distal C-terminus for the regulation of these two channels in trigeminal neurons.

• MeSH
• červený fluorescenční protein MeSH
• ganglion trigeminale metabolismus   MeSH
• genový knockin * MeSH
• kationtové kanály TRPC * genetika   metabolismus   MeSH
• kationtový kanál TRPA1 * genetika   metabolismus   MeSH
• luminescentní proteiny * genetika   metabolismus   MeSH
• myši transgenní * MeSH
• myši MeSH
• rekombinantní fúzní proteiny metabolismus   genetika   MeSH
• vápník metabolismus   MeSH
• zvířata MeSH
• Check Tag
• myši MeSH
• zvířata MeSH
• Publikační typ
• časopisecké články MeSH

Hair follicle development is initiated by reciprocal molecular interactions between the placode-forming epithelium and the underlying mesenchyme. Cell fate transformation in dermal fibroblasts generates a cell niche for placode induction by activation of signaling pathways WNT, EDA, and FGF in the epithelium. These successive paracrine epithelial signals initiate dermal condensation in the underlying mesenchyme. Although epithelial signaling from the placode to mesenchyme is better described, little is known about primary mesenchymal signals resulting in placode induction. Using genetic approach in mice, we show that Meis2 expression in cells derived from the neural crest is critical for whisker formation and also for branching of trigeminal nerves. While whisker formation is independent of the trigeminal sensory innervation, MEIS2 in mesenchymal dermal cells orchestrates the initial steps of epithelial placode formation and subsequent dermal condensation. MEIS2 regulates the expression of transcription factor Foxd1, which is typical of pre-dermal condensation. However, deletion of Foxd1 does not affect whisker development. Overall, our data suggest an early role of mesenchymal MEIS2 during whisker formation and provide evidence that whiskers can normally develop in the absence of sensory innervation or Foxd1 expression.

• MeSH
• crista neuralis MeSH
• forkhead transkripční faktory metabolismus   genetika   MeSH
• homeodoménové proteiny * metabolismus   genetika   MeSH
• mezoderm * metabolismus   MeSH
• myši MeSH
• nervus trigeminus * MeSH
• vibrissae * inervace   růst a vývoj   embryologie   MeSH
• vývojová regulace genové exprese MeSH
• zvířata MeSH
• Check Tag
• myši MeSH
• zvířata MeSH
• Publikační typ
• časopisecké články MeSH

BACKGROUND: Percutaneous rhizotomy of the Gasserian ganglion is a well-established intervention for patients suffering from refractory trigeminal pain, not amenable to pharmacological management or microvascular decompression. Traditionally conducted under fluoroscopic guidance using Hartel's technique, this study investigates a modified approach employing low-dose CT guidance to achieve maximal procedural precision and safety with the emphasis on minimizing radiation exposure. METHODS: A retrospective analysis of patients undergoing percutaneous rhizotomy of the Gasserian ganglion at our institution was undertaken. Procedures were divided into fluoroscopy and CT-guided foramen ovale (FO) cannulation cohorts. Radiation doses were assessed, excluding cases with incomplete data. The study included 32 procedures in the fluoroscopy group and 30 in the CT group. RESULTS: In the CT-guided group, the median effective dose was 0.21 mSv. The median number of CT scans per procedure was 4.5, and the median procedure time was 15 min. Successful FO cannulation was achieved in all 30 procedures (100%). In the fluoroscopy group, the median effective dose was 0.022 mSv, and the median procedure time was 15 min. Cannulation of FO was successful in 31 of 32 procedures (96.9%). The only complications in the CT-guided group were three minor cheek hematomas. Immediate pain relief in the CT-guided group was reported in 25 of 30 procedures (83.3%), 22 of 30 (73.3%) provided relief at one month, and 10 of 18 (55.6%) procedures resulting in pain relief at one month continued to provide relief after two years. CONCLUSION: Low-dose CT-guided percutaneous rhizotomy conducted in the radiology suite carries negligible radiation exposure for patients and eliminates it for personnel. This method is fast, simple, precise, and carries a very low risk of complications.

• MeSH
• dávka záření MeSH
• dospělí MeSH
• fluoroskopie metody   MeSH
• ganglion trigeminale chirurgie   diagnostické zobrazování   MeSH
• lidé středního věku MeSH
• lidé MeSH
• neuralgie trigeminu * chirurgie   diagnostické zobrazování   radioterapie   MeSH
• počítačová rentgenová tomografie * metody   MeSH
• radiační expozice * prevence a kontrola   MeSH
• retrospektivní studie MeSH
• rizotomie * metody   MeSH
• senioři MeSH
• výsledek terapie MeSH
• Check Tag
• dospělí MeSH
• lidé středního věku MeSH
• lidé MeSH
• mužské pohlaví MeSH
• senioři MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH

OBJECTIVES: Olfactory dysfunction (OD) is a common symptom associated with Covid-19. During the Covid-19 pandemic, the importance of psychophysical olfactory tests and electrophysiological olfactory assessment increased. The purpose of the study was to analyze the psychophysical olfactory tests and the post-covid curves of olfactory event-related potentials (OERPs) and trigeminal event-related potentials (TERPs). METHODS: The prospective study included 98 subjects (62 females / 36 males). The average age was 42 years (range 21-84 years). Group I (n = 77) contained participants who had been infected with Covid-19. They were enrolled in the study at least 1 year after Covid-19. Group II (n = 21) was the healthy normosmic control group. RESULTS: In Group I, the OERPs of 18% participants were absent. Patients in Group I were statistically more likely to have an absence of OERPs (p = 0.036) than subjects in Group II. We did not detect a statistical difference in amplitudes and latencies of the OERPs between Group I and Group II. In Group I, N1 latency of the TERPs was significantly longer (p = 0.002) than in Group II. The amplitude of the N1-P2 interval of the TERPs was significantly lower (p = 0.025) in Group I than in Group II. According to the psychophysical Sniffin stick identification test, hyposmia was detected in 39% in Group I versus 0% in the control Group II. CONCLUSION: OD is a common post-covid symptom. The presence of OERPs is a significant prognostic factor for olfactory function after Covid 19. We detected a lower percentage of absence of OERPs after Covid-19 compared to the previously published studies of post-viral OD and post-infectious OD. For TERPs, we detected a longer N1 latency and a lower amplitude for the N1-P2 interval after Covid-19. OERPs and TERPs can be considered valid biomarkers to evaluate the progress of post-covid OD.

• MeSH
• čich fyziologie   MeSH
• COVID-19 * patofyziologie   MeSH
• dospělí MeSH
• evokované potenciály * fyziologie   MeSH
• lidé středního věku MeSH
• lidé MeSH
• mladý dospělý MeSH
• nervus trigeminus patofyziologie   virologie   MeSH
• poruchy čichu * patofyziologie   virologie   etiologie   diagnóza   MeSH
• prospektivní studie MeSH
• SARS-CoV-2 * MeSH
• senioři nad 80 let MeSH
• senioři MeSH
• Check Tag
• dospělí MeSH
• lidé středního věku MeSH
• lidé MeSH
• mladý dospělý MeSH
• mužské pohlaví MeSH
• senioři nad 80 let MeSH
• senioři MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH

Na pracovišti ambulance bolesti v Českých Budějovicích se v posledních dvou letech věnujeme ošetřování akutní progrese chronických bolestí hlavy intranazální aplikací lidokainu. Jedná se o ambulantní, minimálně invazivní a pacienty dobře snášenou metodu. V poloze vleže podáváme malé množství 4% lidokainového gelu opakovaně po 3–5 minutách celkem 3–5krát nosní dírkou na postižené bolestivé polovině hlavy. Aplikátor zavádíme po znecitlivění vstupu do nosu šetrně až do kontaktu se zadní stěnou nosohltanu, pod jehož sliznicí se nachází trigeminální ganglion. Cílem ošetření je ovlivnit lokálním anestetikem ganglion sphenopalatinum a snížit vedení bolesti v povodí trigeminálního nervu z postižené poloviny hlavy a obličeje. Zákrok provádíme opakovaně třikrát týdně. Výkon často kombinujeme s podáním antineuropatické infuze. Metodu jsme vyzkoušeli u pacientů s postherpetickými bolestmi obličeje, při atakách bolestí hlavy u pacientů s roztroušenou sklerózou, u pacientů čekajících na intervenční zákrok při neuralgiích trigeminu na podkladě neurovaskulárního konfliktu. Dobrý efekt byl pozorován i u akutních postpunkčních bolestí hlavy a u migrény. Úlevu od bolesti lze pozorovat po 1–2 hodinách a trvání efektu léčby je velmi individuální: 2 dny až 4 týdny. Opakování zákroku obden a současná aplikace antineuropatické infuze nebo myorelaxační infuze potencují analgetický účinek. Ošetření bývá pacienty dobře snášeno. Při zavádění aplikátoru může dojít k poranění nosní sliznice, během aplikace je patrné slzení, necitlivost a pocit chladu pod okem a v okolí jařmového oblouku ošetřované strany. Občas se vyskytne pálení v oblasti nosohltanu ze zatékajícího lidokainového gelu, což se dá ovlivnit množstvím aplikované látky. Ze zájmu pacientů o opakování aplikace lze usuzovat na pozitivní efekt metody.

At the pain clinic in Budweis, we have been treating the acute progression of chronic headaches using intranasal lidocaine for the past two years. It is an outpatient, minimally invasive method that is well tolerated by patients. In the supine position, we administer a small amount of 4 % lidocaine gel repeatedly after 3-5 minutes a total of 3-5 times through the nostril on the affected painful half of the head. After anesthetizing the entrance to the nose, the applicator is gently inserted until it comes into contact with the back wall of the nasopharynx, under the mucosa of which the trigeminal ganglion is located. The aim of the treatment is to affect the sphenopalatine ganglion with a local anesthetic and to reduce the conduction of pain in the basin of the trigeminal nerve from the affected half of the head and face. We perform the procedure repeatedly 3 times a week. We often combine the procedure with the administration of an antineuropathic infusion. We tried the method in patients with post-herpetic facial pain, in headache attacks in patients with multiple sclerosis, in patients waiting for intervention for trigeminal neuralgia based on neurovascular conflict. A good effect was also observed in acute postpuncture headaches and migraines. The effect can be observed after 1-2 hours and the duration is very individual from 2 days to 4 weeks. Repeating the procedure every other day and simultaneous application of antineuropathic infusion or myorelaxant infusion potentiate the analgesic effect. Treatment is usually well tolerated by patients. When inserting the applicator, the nasal mucosa may be injured, during the application there is steamy lacrimation, numbness and a feeling of coldness under the eye and around the zygomatic arch of the treated side. Sometimes there is a burning sensation in the nasopharynx area from leaking lidocaine gel, which can be influenced by the amount of applied substance. The positive effect of the method can be inferred from the patients‘ interest in repeating the application.

• MeSH
• aplikace intranazální * metody   škodlivé účinky   MeSH
• bolesti hlavy * etiologie   farmakoterapie   klasifikace   MeSH
• dospělí MeSH
• extrakce zubů škodlivé účinky   MeSH
• ganglia parasympatická účinky léků   MeSH
• lidé středního věku MeSH
• lidé MeSH
• lidokain * aplikace a dávkování   škodlivé účinky   terapeutické užití   MeSH
• nervus trigeminus fyziologie   MeSH
• neuralgie trigeminu etiologie   farmakoterapie   MeSH
• Check Tag
• dospělí MeSH
• lidé středního věku MeSH
• lidé MeSH
• ženské pohlaví MeSH
• Publikační typ
• kazuistiky MeSH
• přehledy MeSH

CDK13-related disorder, also known as congenital heart defects, dysmorphic facial features and intellectual developmental disorder (CHDFIDD) is associated with mutations in the CDK13 gene encoding transcription-regulating cyclin-dependent kinase 13 (CDK13). Here, we focused on the development of craniofacial structures and analyzed early embryonic stages in CHDFIDD mouse models, with one model comprising a hypomorphic mutation in Cdk13 and exhibiting cleft lip/palate, and another model comprising knockout of Cdk13, featuring a stronger phenotype including midfacial cleft. Cdk13 was found to be physiologically expressed at high levels in the mouse embryonic craniofacial structures, namely in the forebrain, nasal epithelium and maxillary mesenchyme. We also uncovered that Cdk13 deficiency leads to development of hypoplastic branches of the trigeminal nerve including the maxillary branch. Additionally, we detected significant changes in the expression levels of genes involved in neurogenesis (Ache, Dcx, Mef2c, Neurog1, Ntn1, Pou4f1) within the developing palatal shelves. These results, together with changes in the expression pattern of other key face-specific genes (Fgf8, Foxd1, Msx1, Meis2 and Shh) at early stages in Cdk13 mutant embryos, demonstrate a key role of CDK13 in the regulation of craniofacial morphogenesis.

• MeSH
• cyklin-dependentní kinasy metabolismus   genetika   MeSH
• embryo savčí metabolismus   MeSH
• embryonální vývoj * genetika   MeSH
• fenotyp MeSH
• lebka embryologie   patologie   MeSH
• mentální retardace genetika   MeSH
• modely nemocí na zvířatech * MeSH
• mutace genetika   MeSH
• myši MeSH
• nervus trigeminus embryologie   MeSH
• neurogeneze * genetika   MeSH
• obličej embryologie   abnormality   MeSH
• protein doublecortin MeSH
• rozštěp patra genetika   patologie   embryologie   MeSH
• rozštěp rtu genetika   patologie   embryologie   MeSH
• vývojová regulace genové exprese * MeSH
• zvířata MeSH
• Check Tag
• myši MeSH
• zvířata MeSH
• Publikační typ
• časopisecké články MeSH

• MeSH
• lidé MeSH
• magnetická rezonanční tomografie * metody   trendy   MeSH
• molár třetí * diagnostické zobrazování   MeSH
• nervus lingualis anatomie a histologie   diagnostické zobrazování   MeSH
• nervus mandibularis anatomie a histologie   diagnostické zobrazování   MeSH
• zobrazování trojrozměrné MeSH
• Check Tag
• lidé MeSH
• Publikační typ
• přehledy MeSH

Publikace se zaměřuje na gnatologii; na lékařství oblasti obličeje a úst. Určeno odborné veřejnosti.; Studijní příručka pro stomatology, orální a maxilofaciální chirurgy, fyzioterapeuty, rehabilitační lékaře, dentální hygienistky, zubní techniky i studenty příslušných oborů.

• Klíčová slova
• gnatologie,
• MeSH
• abnormální reflex MeSH
• krční obratle MeSH
• nervus trigeminus MeSH
• obličej MeSH
• pacienti bez organického nálezu MeSH
• temporomandibulární kloub MeSH
• ústa MeSH
• Publikační typ
• monografie MeSH

• Konspekt
• Stomatologie
• NLK Obory
• zubní lékařství

• MeSH
• hlavové nervy * anatomie a histologie   fyziologie   MeSH
• lidé MeSH
• nervus abducens anatomie a histologie   MeSH
• nervus accessorius anatomie a histologie   fyziologie   MeSH
• nervus facialis anatomie a histologie   fyziologie   MeSH
• nervus glossopharyngeus anatomie a histologie   MeSH
• nervus hypoglossus anatomie a histologie   fyziologie   MeSH
• nervus oculomotorius anatomie a histologie   MeSH
• nervus olfactorius anatomie a histologie   fyziologie   MeSH
• nervus opticus anatomie a histologie   fyziologie   MeSH
• nervus trigeminus anatomie a histologie   MeSH
• nervus trochlearis anatomie a histologie   MeSH
• nervus vagus anatomie a histologie   fyziologie   MeSH
• nervus vestibulocochlearis anatomie a histologie   MeSH
• Check Tag
• lidé MeSH
• Publikační typ
• přehledy MeSH

The objective of the study was to determine the effects of inferior alveolar nerve transection on inorganic components in mandibular molars of the rat. We used 26 male laboratory rats of the Wistar strain for the study, age 7-9 weeks. The rats were divided in three groups. The control group (intact) included 6 rats. The surgery was performed under general anesthesia. The experimental group included (group with the nerve transected on the left) included 12 rats. The sham group (group with the nerve prepared without transection) included 8 rats. The animals were sacrificed after 4 weeks. Molars from the left and right sides of the mandible were extracted. Element content levels were determined using inductively coupled plasma mass spectrometry. The following elements were determined in all samples: magnesium (Mg), sodium (Na), potassium (K), calcium (Ca), zinc (Zn), and strontium (Sr). The nerve transection caused: a reduction of the contents of Ca and Sr in the mandibular molars; an increase in the contents of Mg and Zn; a difference arrangement of both sides for Na. The surgery approach itself caused a decrease in the contents of Na and K in the experimental and sham groups; the difference in K in M3 between the left and right sides disappeared due to the surgery. Our results have confirmed the hypothesis of inferior alveolar nerve transection having an effect on inorganic components in mandibular molars in the rat.

• MeSH
• krysa rodu rattus MeSH
• mandibula * chirurgie   MeSH
• moláry chirurgie   MeSH
• nervus mandibularis * fyziologie   chirurgie   MeSH
• potkani Wistar MeSH
• zvířata MeSH
• Check Tag
• krysa rodu rattus MeSH
• mužské pohlaví MeSH
• zvířata MeSH
• Publikační typ
• časopisecké články MeSH