Mutations of PTCH1 gene in two pedigrees with bifid rib-basal cell nevus-jaw cyst syndrome / 浙江大学学报·医学版

Two male patients with bifid rib-basal cell nevus-jaw cyst syndrome (BCNS) were admitted to Department of Stomatology, the First Affiliated Hospital of Bengbu Medical College due to radiological findings of multiple low density shadows in the jaw. Clinical and imaging findings showed thoracic malformation, calcification of the tentorium cerebellum and falx cerebrum as well as widening of the orbital distance. Whole exon high-throughput sequencing was performed in two patients and their family members. The heterozygous mutations of c.C2541C>A(p.Y847X) and c.C1501C>T(p.Q501X) in PTCH1 gene were detected in both patients. Diagnosis of BCNS was confirmed. The heterozygous mutations of PTCH1 gene locus were also found in the mothers of the two probands. Proband 1 showed clinical manifestations of low intelligence, and heterozygous mutations of c.C2141T(p.P714L) and c.G3343A(p.V1115I) were detected in FANCD2 gene. Proband 2 had normal intelligence and no FANCD2 mutation. The fenestration decompression and curettage of jaw cyst were performed in both patients. Regular follow-up showed good bone growth at the original lesion, and no recurrence has been observed so far.

Síndrome de Gorlin-Goltz. Diagnóstico molecular, nuevos tratamientos / Gorlin-Goltz syndrome. Molecular diagnosis, new treatments

Introducción: El síndrome de Gorlin-Goltz o síndrome de carcinoma de nevo basocelular es un desorden hereditario autosómico dominante que predispone principalmente a la proliferación de múltiples carcinomas basocelulares, queratoquistes odontogénicos y defectos del desarrollo, causados por la mutación del gen Patched localizado en el cromosoma 9. Presentación del caso: Se reporta un paciente con características de este síndrome, en la clínica de COMF de la UNAM. El diagnóstico fue basado en los estudios clínicos, imagenológicos y moleculares. Conclusiones: El conocimiento de esta enfermedad puede orientarnos a la sospecha diagnóstica de lesión quística o premaligna en forma oportuna, lo que permite prevenir complicaciones y brindar un tratamiento integral para así mejorar la calidad de vida de este tipo de pacientes (AU)

Introduction: Gorlin-Goltz syndrome or cell-based nevus carcinoma syndrome is an autosomal dominant inherited disorder that predisposes mainly to the proliferation of multiple basal cell carcinomas, maxillary keratocysts and developmental defects, caused by the mutation of the Patched gene located on chromosome 9. Case presentation: A patient with specific characteristics compatible with this syndrome was reported in the COMF Department of the UNAM. The diagnosis was based on clinical studies, radiology and genetic studies. Conclusions: Knowledge of this problem can guide us to the diagnostic suspicion in a timely manner, thus preventing complications, and to provide an improved integral treatment of the quality of life of this type of patients (AU)

Investigation of self-renewal mechanism about CD133+ cancer stem cells in human laryngeal carcinoma Hep-2 cell line / 临床耳鼻咽喉头颈外科杂志

OBJECTIVE@#To investigate the self-renewal mechanism of CD133+ cancer stem cells from Hep-2 cell line.@*METHOD@#The CD133+ cells were sorted by flow cytometry from Hep-2 cell line. Then the sorted CD133+ cells were cultured in RPMI1640. The ability of self-renewal of CD133+ cells were tested by MTT assay. mRNA and protein expression of self-renewal related genes were detected by western blot and RT- PCR.@*RESULT@#(3.10 ± 0.21)% of Hep-2 cells expressed the membrane antigen CD133. CD133+ fraction was raised to (90.20 ± 5.51)% by flow cytometry. In vitro culture and growth curve showed CD133+ cells had more active proliferation ability than CD133- cells, which showed statistically significant difference between these two group (P < 0.01). RT- PCR and western blot results showed upregulated mRNA and protein expression of Fas, c-myc, survivin in CD133+ group (P < 0.01). In the same time, the ratio of Bcl-2/Bax gene expression was obviously increased in CD133+ group. Self-renewal related gene such as β-catenin, SHH, SMOH and Bmi-1,Gli-1 were all up-regulated in CD133+ group both in mRNA and protein. On the contrary, PTCH gene was down-regulated.@*CONCLUSION@#CD133 positive cells are a small proportion of a Hep-2 cell line. The results of this experiment verified that CD133 positive cells owned the properties of cancer stem cells. Upregulated anti-apoptotic gene is the foundatiom of self-renewal mechanism of CD133+ cells. Cancer stem cells related signal pathways such as Hedgehog, Wnt and Bmi-1 pathway are in state of activation. The identification of self-renewal mechanism about cancer stem cell provides a powerful tool to investigate the tumorigenic process in the larynx and to develop therapies targeting to these signal pathways.

Effect of Helicobacter pylori lipopolysaccharide on expression of Gli and Ptch-1 proteins in sonic hedgehog signaling pathway of gastric mucosa GES-1 cells / 浙江大学学报·医学版

<p><b>OBJECTIVE</b>To investigate the effect of Helicobacter Pylori lipopolysaccharide (Hp-LPS) on expression of Gli and Ptch-1 proteins in sonic hedgehog (Shh) signaling pathway of gastric mucosa GES-1 cells.</p><p><b>METHODS</b>The LPS was extracted from Hp by hot phenol water method, and then the concentration of LPS was detected by the kinetic turbidimetric assay. GES-1 cells were stimulated by different concentrations of Hp-LPS (0, 1, 10, 20, 30 and 40 μg/ml). The inhibition rates of cell growth were measured by MTT assay after treated with Hp-LPS for 24 h. The expression of Gli and Ptch-1 proteins were determined by Western Blot.</p><p><b>RESULTS</b>MTT assay showed that the inhibition rates of GES-1 cell growth after treatment by different concentrations of Hp-LPS (1, 10, 20, 30 and 40μg/ml) were 25.8% ± 2.7%, 34.2% ± 3.1 %, 46.3% 3.4%, 60.8% ± 2.1% and 82.9% ± 2.8% respectively (r=0.985, P<0.001). Western blot showed that the expressions of Gli and Ptch-1 proteins were decreased after Hp-LPS treatment (0, 1, 10, 20, 30 and 40 μg/ml): the relative expression values of Gli were 1.286 ± 0.180, 0.963 ± 0.067, 0.850 ± 0.085, 0.566 ± 0.058, 0.549 ± 0.056 and 0.377 ± 0.047, respectively (r=-0.945, P<0.001); those of Ptch-1 were 1.688 ± 0.088, 1.466 ± 0.061, 1.170 ± 0.065, 1.042 ± 0.064, 0.648 ± 0.057 and 0.482 ± 0.074, respectively (r=-0.985, P<0.001).</p><p><b>CONCLUSION</b>Hp-LPS can decrease the related protein expression of Shh signaling pathway, which indicates that Hp may interfere with the function of Shh signaling pathway in gastric mucosa via the effect of its LPS.</p>

Expression and significance of sonic hedgehog signaling pathway-related components in brainstem and supratentorial astrocytomas / 中华医学杂志(英文版)

<p><b>BACKGROUND</b>Studies have shown that abnormal activation of the sonic hedgehog pathway is closely related to tumorigenesis in central nervous system. This study aimed to investigate the role of the sonic hedgehog signaling pathway in the occurrence of brainstem and supratentorial glioma.</p><p><b>METHODS</b>Real-time quantitative reverse transcription polymerase chain reaction (qRT-PCR) and immunohistochemistry were used to detect the expression of sonic hedgehog-related components in 5 specimens of normal brain tissue, 10 of grade II brainstem glioma, and 10 of grade II supratentorial glioma. The significance of differences between two groups was determined using the Mann-Whitney U test or the two-sample test according to the results of normality distribution tests.</p><p><b>RESULTS</b>The mRNA expression levels of sonic hedgehog-related genes were higher in brainstem astrocytomas than in supratentorial astrocytomas and normal brain tissue. The level of protein patched homolog 1 (PTCH1) was significantly higher in brainstem astrocytomas than in supratentorial astrocytomas and normal brain tissue (P < 0.01). Immunohistochemistry semi-quantitative analysis was consistent with the qRT-PCR result that PTCH1 expression was increased significantly in brainstem astrocytomas at the protein level (P < 0.05).</p><p><b>CONCLUSIONS</b>Enhanced PTCH1 expression and activation of the sonic hedgehog pathway are involved in brainstem glioma. This may be related to the difference in malignant biological behavior between brainstem and hemispheric glioma, and could be an ideal therapeutic target in brainstem glioma.</p>

Relationship between hedgehog signaling pathway molecules and HPV16 infection in uterine cervical cancers / 中华病理学杂志

<p><b>OBJECTIVE</b>To investigate the significance of sonic hedgehog (Shh), indian hedgehog (Ihh), smoothened (Smo) and patched (Ptch) expressions in uterine cervical lesions and their relationships with HPV type 16 infection.</p><p><b>METHODS</b>Totally 183 cases of cervical lesions, including 32 non-neoplastic cervix, 71 cervical intraepithelial neoplasia (28 CINI, 18 CINII, and 25 CINIII) and 80 squamous cell carcinomas (SCC) were selected from the Department of Pathology, Yanbian University Hospital, Yanbian Women Hospital, and Yanbian Tumor Hospital. Shh, Ihh, Ptch and Smo proteins expression were investigated by immunohistochemistry using tissue microarry platform, and the presence of HPV type 16 was detected by PCR method.</p><p><b>RESULTS</b>Immunohistochemical staining showed that the frequencies of Shh, Ihh, Ptch and Smo expression were rare in normal cervical epithelium, but were strongly expressed in cervical cancer and its precursor lesions (CINII/III) (P < 0.01, P < 0.01, P < 0.05, P < 0.05, respectively). In cervical cancer, the expression rate of Shh (95%) was higher than that of CIN (CINI to CINIII) (46.4%, 61.1%, 80.0%, respectively, P < 0.05). HPV16 was positive in 77.5% of SCC. In cervical cancer, the expression of Shh was related with HPV16 infection (P < 0.05), and the expression of Smo was correlated with lymph node metastasis (P < 0.05).</p><p><b>CONCLUSIONS</b>Shh, Ihh, Ptch, and Smo genes may play important roles in the development of cervical cancer. Detection of Hedgehog signaling pathway molecules seems helpful for the early diagnosis of cervical cancer and its precursor lesions, and are potentially therapeutic targets as well.</p>

Identification of known and novel PTCH mutations in both syndromic and non-syndromic keratocystic odontogenic tumors / 国际口腔科学杂志·英文版

<p><b>AIM</b>To clarify the role of PTCH in patients with NBCCS-related and non-sydromic keratocystic odontogenic tumors.</p><p><b>METHODOLOGY</b>Mutation analysis was undertaken in 8 sporadic and 4 NBCCS-associated KCOTs.</p><p><b>RESULTS</b>Four novel and two known mutations were identified in 2 sporadic and 3 syndromic cases, two of which being germline mutations (c.2179delT, c.2824delC) and 4 somatic mutations (c.3162dupG, c.1362-1374dup, c.1012 C>T, c.403C>T).</p><p><b>CONCLUSION</b>Our findings suggest that defects of PTCH are associated with the pathogenesis of syndromic as well as a subset of non-syndromic KCOTs.</p>

A new mutation of PTCH gene in a Chinese family with nevoid basal cell carcinoma syndrome / 中华医学杂志(英文版)

<p><b>BACKGROUND</b>Nevoid basal cell carcinoma syndrome (NBCCS) is a rare autosomal dominant disease characterized by a combination of development anomalies and a predisposition to tumour formation. Mutation of patched gene (PTCH), considered the molecular defect of NBCCS, in a Chinese NBCCS family was investigated in this study.</p><p><b>METHODS</b>Genomic DNA was isolated from blood samples of all 12 members of this family. The mutated PTCH gene was screened by polymerase chain reaction amplification and direct sequencing.</p><p><b>RESULTS</b>A new mutation of 3 bp (GAT deletion) was found in all seven affected members of this family. This mutation caused one aspartate deletion in the fourth transmembrane domain of the PTCH protein located within the sterol sensing domain (SSD). This deletion was not found in any unaffected members of this family nor in 200 control samples.</p><p><b>CONCLUSIONS</b>Our findings suggest that one 3-bp deletion in PTCH gene was the cause of nevoid basal cell carcinoma in a Chinese family through affecting the conformation and function of PTCH protein.</p>

PTCH gene mutations in odontogenic keratocysts / 中华口腔医学杂志

<p><b>OBJECTIVE</b>To investigate the frequency, type and distribution of PTCH mutations in odontogenic keratocysts (OKC) and to analyze the molecular pathological relationship between sporadic OKC and OKC associated with nevoid basal cell carcinoma syndrome (NBCCS).</p><p><b>METHODS</b>Genomic DNA was extracted from 8 cases of OKC lesions (4 sporadic OKCs and 4 NBCCS-related OKCs). PTCH gene mutations were detected by PCR-direct sequencing.</p><p><b>RESULTS</b>Six novel PTCH mutations were identified in 6 out of 8 cases (2 sporadic and 4 NBCCS-related OKCs). Two of these were missense mutations leading to substitution of an amino acid residue respectively. The other 4 mutations were identified as insertion or deletion ranging from one single base to 7 bases, three of which caused frame-shift leading to premature truncation of PTCH protein and one resulted in an insertion of 2 amino acid residues. All these identified mutations were novel and have not been previously described.</p><p><b>CONCLUSIONS</b>PTCH gene mutation is a common event in NBCCS-related OKCs and could also be detected in some sporadic OKCs. Abnormalities of PTCH gene may be involved in the pathogenesis of OKC.</p>

Genetic linkage analysis and mutation detection in Chinese families with basal cell nevus syndrome / 中华口腔医学杂志

<p><b>OBJECTIVE</b>To study the molecular genetic etiology of a Chinese pedigree with basal cell nevus syndrome.</p><p><b>METHODS</b>The proband and his affected mother and a unaffected individual in the pedigree were chosen and peripheral blood was collected from them for DNA. Direct sequencing was performed to detect the mutations of PTCH gene. In order to further confirm the results of sequence analysis, all available family members were analyzed with genetic linkage analysis using 3 highly polymorphic microsatellite DNA markers in the region of 9q22.3-q31.</p><p><b>RESULTS</b>No mutations of PTCH gene was detected in the proband's mother, one synonymous mutation was detected in the proband. Linkage analysis showed that the Lod scores of the 3 markers were: D9S283, Z = -2.11 (theta = 0.00); D9S1690, Z = -2.95 (theta = 0.00); D9S1677, Z = -5.94 (theta = 0.00).</p><p><b>CONCLUSIONS</b>In this pedigree, mutation of PTCH gene is not related to the underlying pathogenesis of the syndrome.</p>

Expression of Shh, Ptc1, Ptc2 mRNA in the cap stage of mouse molar / 中华口腔医学杂志

<p><b>OBJECTIVE</b>To investigate the expression of Shh and its receptors Ptc1 and Ptc2 mRNA in the cap stage of mouse molar and discuss its role in early tooth morphogenesis.</p><p><b>METHODS</b>The embryonic mouse heads of early tooth development (E10.5 - E15.5) were obtained and 5 micro m serial sections were made. Immunohistochemical staining of PCNA was carried out by SP method. The expression pattern of Shh, Ptc1, and Ptc2 mRNA was analysed by in situ hybridization.</p><p><b>RESULTS</b>E14.5, outer dental epithelium, inner dental epithelium, stellate reticulum and underlying dental mesenchyme were PCNA positive. Most of the enamel knot cells were PCNA negative. A few of the enamel knot cells were PCNA positive. Shh, Ptc1, and Ptc2 mRNA were strongly expressed in outer dental epithelium, inner dental epithelium, stellate reticulum and the enamel knot.</p><p><b>CONCLUSION</b>In the cap stage, Shh as a paracrine and autocrine signaling molecule might stimulate epithelium and mesenchyme proliferation.</p>