51
|
Sarkar DK, Chaturvedi K, Oomizu S, Boyadjieva NI, Chen CP. Dopamine, dopamine D2 receptor short isoform, transforming growth factor (TGF)-beta1, and TGF-beta type II receptor interact to inhibit the growth of pituitary lactotropes. Endocrinology 2005; 146:4179-88. [PMID: 15961557 PMCID: PMC2872191 DOI: 10.1210/en.2005-0430] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The neurotransmitter dopamine is known to inhibit prolactin secretion and the proliferation of lactotropes in the pituitary gland. In this study, we determined whether dopamine and TGFbeta1 interact to regulate lactotropic cell proliferation. We found that dopamine and the dopamine agonist bromocriptine stimulated TGFbeta1 secretion and TGFbeta1 mRNA expression but inhibited lactotropic cell proliferation both in vivo and in vitro. The dopamine's inhibitory action on lactotropic cell proliferation was blocked by a TGFbeta1-neutralizing antibody. We also found that PR1 cells, which express low amounts of the dopamine D2 receptor, demonstrated reduced expression of TGFbeta1 type II receptor and TGFbeta1 mRNA levels and had undetectable levels of TGFbeta1 protein. These cells showed a reduced TGFbeta1 growth-inhibitory response. Constitutive expression of the D2 receptor short isoform, but not the D2 receptor long isoform, induced TGFbeta1 and TGFbeta1 type II receptor gene expression and recovered dopamine- and TGFbeta1-induced growth inhibition in PR1 cells. The constitutive expression of D2 receptor short isoform also reduced the tumor cell growth rate. These data suggest that a TGFbeta1 system may mediate, in part, the growth-inhibitory action of dopamine on lactotropes.
Collapse
MESH Headings
- Activin Receptors, Type I/genetics
- Activin Receptors, Type I/physiology
- Animals
- Bromocriptine/pharmacology
- Cells, Cultured
- Dopamine/pharmacology
- Estradiol/pharmacology
- Female
- Hypothalamic Hormones/metabolism
- Ovariectomy
- Pituitary Gland, Anterior/cytology
- Pituitary Gland, Anterior/drug effects
- Pituitary Gland, Anterior/physiology
- Protein Serine-Threonine Kinases
- RNA, Messenger/genetics
- Rats
- Rats, Inbred F344
- Receptor, Transforming Growth Factor-beta Type I
- Receptor, Transforming Growth Factor-beta Type II
- Receptors, Dopamine D2/physiology
- Receptors, Transforming Growth Factor beta/genetics
- Receptors, Transforming Growth Factor beta/physiology
- Transforming Growth Factor beta/genetics
- Transforming Growth Factor beta/metabolism
- Transforming Growth Factor beta/physiology
- Transforming Growth Factor beta1
- Transforming Growth Factor beta2
Collapse
|
52
|
Lai MK, Tsang SW, Alder JT, Keene J, Hope T, Esiri MM, Francis PT, Chen CP. Loss of serotonin 5-HT2A receptors in the postmortem temporal cortex correlates with rate of cognitive decline in Alzheimer's disease. Psychopharmacology (Berl) 2005; 179:673-7. [PMID: 15551121 DOI: 10.1007/s00213-004-2077-2] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/01/2004] [Accepted: 10/06/2004] [Indexed: 10/26/2022]
Abstract
RATIONALE Previous studies have demonstrated reductions of serotonin 5-HT 2A receptors in the neocortex of Alzheimer's disease (AD) patients. However, it is unclear whether such losses play a role in the cognitive decline of AD. OBJECTIVES To correlate neocortical 5-HT 2A receptor alterations with cognitive decline in AD. METHODS Postmortem frontal and temporal cortical 5-HT 2A receptors were measured by [3H]ketanserin binding in aged controls as well as in a cohort of AD patients who had been longitudinally assessed for cognitive decline and behavioral symptoms. RESULTS 5-HT 2A receptor densities in both regions were reduced in severely demented AD patients compared to age-matched controls. In the temporal cortex, this reduction also correlated with the rate of decline of Mini-Mental State Examination (MMSE) scores. The association between 5-HT 2A receptor loss and cognitive decline was independent of the effects of choline acetyltransferase (ChAT) activity and presence of behavioral symptoms. CONCLUSIONS Our data suggest that loss of neocortical 5-HT 2A receptors may predict for faster cognitive decline in AD, and point to serotomimetics as potentially useful adjuvants to cholinergic replacement therapies.
Collapse
|
53
|
Chen CP, Linn SP, Ho CS, Chern SR, Lee CC, Chen WL, Wang W. Distal 3p monosomy associated with epilepsy in a boy. GENETIC COUNSELING (GENEVA, SWITZERLAND) 2005; 16:429-32. [PMID: 16440889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
|
54
|
Chen CP. Maternal diabetes and neural tube defects: prenatal diagnosis of lumbosacral myelomeningocele, ventriculomegaly, Arnold-Chiari malformation and foot deformities in a pregnancy with poor maternal metabolic control, and review of the literature. GENETIC COUNSELING (GENEVA, SWITZERLAND) 2005; 16:313-6. [PMID: 16259331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
|
55
|
Chen CP, Chern SR, Lin CJ, Lee CC, Wang W, Tzen CY. A comparison of maternal age, sex ratio and associated anomalies among numerically aneuploid, structurally aneuploid and euploid holoprosencephaly. GENETIC COUNSELING (GENEVA, SWITZERLAND) 2005; 16:49-57. [PMID: 15844779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
During the period January 1987-July 2003, 59 cases of perinatally detected holoprosencephaly (HPE) with cytogenetic results were identified among 97,306 deliveries at Mackay Memorial Hospital. Among these 59 cases with HPE, 25 had euploidy, 27 had numerical aneuploidy, and 7 had structural aneuploidy. In the euploid cases, the male:female sex ratio was 0.39:1, whereas in the aneuploid cases, the ratio was 1:1. The mean (+/-SD) maternal ages for numerical aneuploidy, structural aneuploidy, and euploidy were 33.0 +/- 5.1 years, 27.9 +/- 2.1 years, and 27.8 +/- 5.0 years, respectively. The frequencies of associated major structural anomalies other than craniofacial defects in the cases with numerical aneuploidy, structural aneuploidy, and euploidy were 85.7%, 0%, and 16%, respectively. The present study of HPE suggests that a female excess appears only in the euploid cases, and advanced maternal age and structural anomalies are more commonly associated with the numerically aneuploid cases than the structurally aneuploid and euploid cases.
Collapse
|
56
|
Chen CP. Fetal therapy and cytogenetic testing: prenatal detection of chromosome aberration during thoracocentesis for congenital chylothorax by karyotyping from pleural effusion fluid and review of the literature. GENETIC COUNSELING (GENEVA, SWITZERLAND) 2005; 16:301-5. [PMID: 16259328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
This report serves to emphasize the necessity of rapid cytogenetic testing during fetal therapy for congenital hydrothorax and to review the literature. A 31-year-old primigravid woman was noted to have bilateral fetal hydrothorax, polyhydramnios, and preterm labor at 32 weeks' gestation. Echo-guided thoracocentesis was performed to draw 50 ml of golden/yellow pleural effusion fluid and 500 ml of amniotic fluid. Cytogenetic analysis of the lymphocytes obtained from the pleural effusion fluid revealed a karyotype of 47, XY, + 21. The pleural effusion fluid was predominantly lymphocytic and positive for the Rivalta test. A sonographic examination at 33 weeks' gestation revealed recurrent pleural effusion, but the woman refused repeat thoracocentesis and tocolytic management. A 2,568-g male baby with characteristic phenotypic findings of Down syndrome was delivered vaginally and expired after birth. The present case reinforces the notions that fetuses with congenital chylothorax are at risk for chromosomal abnormalities, and drainage of pleural effusion must include a rapid diagnosis of fetal karyotype. The cytogenetic information acquired is useful for genetic counseling and perinatal obstetric management.
Collapse
|
57
|
Wong AM, Pei YC, Hong WH, Chung CY, Lau YC, Chen CP. Foot contact pattern analysis in hemiplegic stroke patients: An implication for neurologic status determination11No commercial party having a direct financial interest in the results of the research supporting this article has or will confer a benefit upon the authors(s) or upon any organization with which the author(s) is/are associated. Arch Phys Med Rehabil 2004; 85:1625-30. [PMID: 15468022 DOI: 10.1016/j.apmr.2003.11.039] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
OBJECTIVE To investigate the feasibility of using a foot contact pattern to predict neurologic recovery and the effect of ambulation training in hemiplegic stroke patients. DESIGN Case-comparison study. SETTING Gait laboratory in a tertiary care center. PARTICIPANTS Sixty-five functionally ambulant hemiplegic stroke patients, and 30 healthy subjects serving as the control group. INTERVENTIONS Gait analyses were performed by using the conventional gait analysis system (6 cameras) and the portable Computer DynoGraphy (CDG) system. Main outcome measures Walking velocity, step length, and cadence were measured from the conventional gait analysis system. Cyclogram, gaitline, and ground reaction force (GRF) patterns were recorded with the CDG system. RESULTS Velocity, cadence, and step length increased in higher Brunnstrom stages (P<.01). Negative correlation was noted between the Brunnstrom stages and the foot contact patterns (P<.01). Lower cyclogram, GRF, and gaitline patterns were expected in subjects with higher Brunnstrom stages. There were high prediction probabilities between cyclogram, gaitline, and GRF patterns. CONCLUSIONS Foot contact pattern can be a simple and reliable indicator of hemiplegic gait in stroke patients. It is closely related to patient's neurologic status and is correlated with parameters obtained from conventional gait analysis systems. Pathologic presentations are noted in both the affected and unaffected limbs, suggesting that rehabilitation programs should be implemented on both sides.
Collapse
|
58
|
Tang SF, Chen CP, Chen MJ, Pei YC, Lau YC, Leong CP. Changes in sagittal ground reaction forces after intra-articular hyaluronate injections for knee osteoarthritis. Arch Phys Med Rehabil 2004; 85:951-5. [PMID: 15179649 DOI: 10.1016/j.apmr.2003.08.095] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
OBJECTIVES To examine the gait patterns and the sagittal ground reaction forces (GRFs) in persons with knee osteoarthritis (OA) after intra-articular injection of hyaluronate and to investigate the duration of its treatment effectiveness. DESIGN Case-comparison study. SETTING Gait laboratory in a tertiary care center. PARTICIPANTS Fifteen subjects (30 knees) with symptomatic knee OA (stage I or II, according to the Ahlbäck grading system), and 15 age-, mass-, and gender-matched non-OA control subjects (30 knees). INTERVENTION After initial gait analysis, the group with knee OA received 5 weekly intra-articular injections of hyaluronate to bilateral knees. Gait analysis was performed again for the group with knee OA after the completion of hyaluronate injections. MAIN OUTCOME MEASURES Forceplate sagittal GRFs and gait parameters of velocity, cadence, step length, and stride time. RESULTS The distinctive 2-peak force vector GRF was lost in persons with knee OA. The first peak rise time was significantly delayed (P<.05). The group with knee OA also revealed slower walking velocity and cadence, as well as longer stride time, than the control group (P<.05). The distinctive 2-peak force vector GRF diagram could be recovered in patients with knee OA after the completion of hyaluronate injections. CONCLUSIONS Gait patterns and GRFs improved significantly after intra-articular knee injection of hyaluronate in persons with Ahlbäck stages I and II knee OA. The clinical treatment effect was immediate and may last for 6 months or more.
Collapse
|
59
|
Su TH, Wang YD, Chen CP, Lei SY. A conservative surgical treatment of cervical pregnancy with active bleeding - uterine artery ligation and cervicotomy. Int J Gynaecol Obstet 2004; 37:275-9. [PMID: 1350543 DOI: 10.1016/0020-7292(92)90329-h] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Cervical pregnancy complicated with massive bleeding usually results in abdominal hysterectomy, and thus the patient loses her fertility potential. Conservative management to control active hemorrhaging as well as to preserve reproductive function is necessary for women who desire more children. We present four patients with cervical pregnancy, complicated by life threatening hemorrhage, who were successfully treated with uterine artery ligation and cervicotomy. Subsequently, one patient had two successful term pregnancies delivered by cesarean section.
Collapse
|
60
|
|
61
|
Chen CP, Lee CC, Town DD, Lee MS, Wang W. Discrepancy between the fetus and extra-embryonic tissues in prenatally detected mosaic distal 5p deletion. GENETIC COUNSELING (GENEVA, SWITZERLAND) 2004; 15:473-6. [PMID: 15658625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/01/2023]
Abstract
Discrepancy between the fetus and extra-embryonic tissues in prenatally detected mosaic distal 5p deletion: We present clinical and cytogenetic data on a second-trimester fetus with mosaic del(5)(p15.1) and the extra-embryonic tissues with a normal karyotype. A 34-year-old woman, gravida 2, para 0, underwent genetic amniocentesis at 20 weeks' gestation because of advanced maternal age. Cytogenetic analysis of the cultured amniocytes revealed mosaicism for a distal 5p deletion, mos 46,XY,del(5)(p15.1)[4]/46,XY[26]. The pregnancy was terminated subsequently. Postnatally, the fetus displayed a triangular face, hypertelorism, epicanthal folds, low-set ears, and micrognathia. A karyotype of mos 46,XY,del(5)(pl 5.1)/46,XY was found in the liver, lungs, skin, and cord blood, whereas, the placenta, amnion, and umbilical cord had a karyotype of 46,XY. Our observation of fetoplacental, fetoamniotic, and fetoumbilical discrepancies shows a limitation of using placenta, amnion, and umbilical cord as confirmatory tools for prenatally detected mosaic distal 5p deletion. Our case also reinforces the notion that amniocentesis offers a more reliable diagnosis, compared to chorionic villus sampling.
Collapse
|
62
|
Chen CP, Lin SP, Chern SR, Lee CC, Huang JK, Wang W, Liao YW. De novo satellited 21q associated with corpus callosum dysgenesis, colpocephaly, a concealed penis, congenital heart defects, and developmental delay. GENETIC COUNSELING (GENEVA, SWITZERLAND) 2004; 15:437-42. [PMID: 15658619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/01/2023]
Abstract
De novo satellited 21q associated with corpus callosum dysgenesis, colpocephaly, a concealed penis, congenital heart defects, and developmental delay: We present clinical and cytogenetic data on an infant with de novo satellited 21 q. A 3-month-old boy was found to have microcephaly, developmental delay, hypertelorism, down-slanting palpebral fissures, large low-set ears, a prominent nose, a broad philtrum, a concealed penis, interventricular septal defects, corpus callosum dysgenesis, colpocephaly, ventriculomegaly, and a de novo karyotype of 46,XY,21qs. Standard Ag-NOR staining and FISH studies confirmed a satellite and a deletion on the long arm of a chromosome 21. Quantitative-fluorescent polymerase chain reaction using the polymorphic small tandem repeat markers specific for chromosome 21 determined a maternal origin of the deletion and the breakpoint between D21S156 (21q22.1) (present) and D21S53 (21q22.3) (absent), centromeric to the known minimal holoprosencephaly critical region, D21S13-21qter. The present case provides evidence of the correlation of a distal region of chromosome 21 to the phenotypic effects of monosomy 21.
Collapse
|
63
|
Chen CP. Perinatal identification of caudal regression syndrome and alobar holoprosencephaly in pregnancies with poor maternal metabolic control. GENETIC COUNSELING (GENEVA, SWITZERLAND) 2004; 15:485-8. [PMID: 15658628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/01/2023]
|
64
|
Lai MK, Tsang SW, Francis PT, Esiri MM, Hope T, Lai OF, Spence I, Chen CP. [3H]GR113808 binding to serotonin 5-HT(4) receptors in the postmortem neocortex of Alzheimer disease: a clinicopathological study. J Neural Transm (Vienna) 2003; 110:779-88. [PMID: 12811638 DOI: 10.1007/s00702-003-0825-9] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Abnormalities in neural transmission of serotonin (5-HT) may play a role in both cognitive and neuropsychiatric features of Alzheimer disease (AD). We measured 5-HT(4) receptors in the postmortem frontal and temporal cortex of 34 AD subjects and 15 controls by radioligand binding with [3H]GR113808. Receptor binding data was then correlated with prospectively assessed cognitive (Mini-Mental State Examination, MMSE) and behavioral (Present Behavioural Examination, PBE) data. [3H]GR113808 binding affinity (K(D)) and density (B(max)) in AD were unchanged compared to controls in both cortical regions, and did not correlate with MMSE or PBE data. The binding parameters were also not related to disease duration, senile plaque and neurofibrillary tangle counts, and neuroleptic medication. We conclude that unlike other 5-HT receptors, 5-HT(4) receptor binding affinity and density do not seem to be affected in the frontal and temporal cortex in AD and may not have a direct role in the clinical features of the disease.
Collapse
|
65
|
Li HB, Li J, Wong HT, Chang CY, Chen CP, Fang JM, Hu CH, Kuo WS, Lai WP, Lee FS, Lee SC, Lin ST, Luo CS, Liu Y, Qiu JF, Sheng HY, Singh V, Su RF, Teng PK, Tong WS, Wang SC, Xin B, Yeh TR, Yue Q, Zhou ZY, Zhuang BA. Limit on the electron neutrino magnetic moment from the kuo-sheng reactor neutrino experiment. PHYSICAL REVIEW LETTERS 2003; 90:131802. [PMID: 12689275 DOI: 10.1103/physrevlett.90.131802] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2002] [Indexed: 05/24/2023]
Abstract
A search of neutrino magnetic moment was carried out at the Kuo-Sheng Nuclear Power Station at a distance of 28 m from the 2.9 GW reactor core. With a high purity germanium detector of mass 1.06 kg surrounded by scintillating NaI(Tl) and CsI(Tl) crystals as anti-Compton detectors, a detection threshold of 5 keV and a background level of 1 kg(-1) keV(-1) day(-1) at 12-60 keV were achieved. Based on 4712 and 1250 h of reactor ON and OFF data, respectively, the limit on the neutrino magnetic moment of mu(nu;(e))<1.3x10(-10)mu(B) at 90% confidence level was derived. An indirect bound of the nu;(e) radiative lifetime of m(3)(nu)tau(nu)>2.8x10(18) eV(3) s can be inferred.
Collapse
|
66
|
Chen CP, Lin SP. Distal 10q trisomy associated with bilateral hydronephrosis in infancy. GENETIC COUNSELING (GENEVA, SWITZERLAND) 2003; 14:359-62. [PMID: 14577683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/27/2023]
Abstract
We present clinical and cytogenetic data on a 2.5 year-old boy with partial monosomy 22p (p11.2-->pter) and distal 10q trisomy (10q24.1-->qter), resulting from maternal t(10;22) reciprocal translocation. The patient had bilateral hydronephrosis and hydroureters but without evidence of vesicoureteral reflux. Our clinical observation suggests that urinary collecting system anomaly may be an integral part of distal 10q trisomy syndrome. We recommend detailed imaging studies of urinary tracts be performed on probands with chromosomal disorders involving a duplication of distal 10q.
Collapse
|
67
|
Chen CP. Second-trimester diagnosis of mosaic idic(20)(p11) confined to amniocytes without an abnormal phenotype. GENETIC COUNSELING (GENEVA, SWITZERLAND) 2003; 14:439-41. [PMID: 14738121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/28/2023]
|
68
|
Tang SF, Chen CP, Pan JL, Chen JL, Leong CP, Chu NK. The effects of a new foot-toe orthosis in treating painful hallux valgus. Arch Phys Med Rehabil 2002; 83:1792-5. [PMID: 12474189 DOI: 10.1053/apmr.2002.34835] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
OBJECTIVE To assess the effects of a new foot-toe orthosis on painful hallux valgus. DESIGN Uncontrolled intervention study. SETTING An outpatient clinic in a tertiary medical center with an orthotic laboratory in Taiwan. PARTICIPANTS Seventeen patients with painful hallux valgus. INTERVENTION Application of a new total contact insole with fixed toe separator. MAIN OUTCOME MEASURES The hallux valgus angle, an 11-point numeric rating scale (NRS-11) for pain assessment, and walking ability scale. RESULTS The average hallux valgus angle reduction +/- standard deviation was 6.5 degrees +/-3.8 degrees after insole application (P<.001). An improvement on the NRS-11 pain scale from 4.06+/-2.8 to 0.88+/-1.17 (P<.001) was noted after immediate insole application and was.42+/-.67 (P=.002) 3 months later for the 12 patients who completed the study. The walking ability scale improved at least 1 grade or more after the insole was worn for 3 months (P=.002). All patients tolerated the insole well without any clinical evidence of skin ulcers or blisters. CONCLUSION Our new total contact insole with fixed toe separator reduced pain, and improved walking ability and the hallux valgus angle. It is an effective alternative treatment for patients with painful hallux valgus.
Collapse
|
69
|
|
70
|
Chen CP, Tzen CY, Chang TY, Yeh LF, Wang W. Prenatal diagnosis of acrania associated with facial defects, amniotic bands and limb-body wall complex. ULTRASOUND IN OBSTETRICS & GYNECOLOGY : THE OFFICIAL JOURNAL OF THE INTERNATIONAL SOCIETY OF ULTRASOUND IN OBSTETRICS AND GYNECOLOGY 2002; 20:94-95. [PMID: 12100428 DOI: 10.1046/j.1469-0705.2002.00722_1.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
|
71
|
Chen CP, Sheu JC, Lin SP, Lin CJ, Chan YJ, Wang W. Sonographic findings in a case of congenital pyloric diaphragm. ULTRASOUND IN OBSTETRICS & GYNECOLOGY : THE OFFICIAL JOURNAL OF THE INTERNATIONAL SOCIETY OF ULTRASOUND IN OBSTETRICS AND GYNECOLOGY 2002; 19:528-529. [PMID: 11982994 DOI: 10.1046/j.1469-0705.2002.00716.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
|
72
|
Chen CP. Prenatal sonographic diagnosis of median facial cleft should alert holoprosencephaly with premaxillary agenesis and prompt genetic investigations. ULTRASOUND IN OBSTETRICS & GYNECOLOGY : THE OFFICIAL JOURNAL OF THE INTERNATIONAL SOCIETY OF ULTRASOUND IN OBSTETRICS AND GYNECOLOGY 2002; 19:421-422. [PMID: 11952980 DOI: 10.1046/j.1469-0705.2002.00533_5.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
|
73
|
Lee-Chen GJ, Lin SP, Ko MH, Chuang CK, Chen CP, Lee HH, Cheng SC, Shen CH, Tseng KL, Li CL. Identification and characterization of mutations underlying Sanfilippo syndrome type A (mucopolysaccharidosis type IIIA). Clin Genet 2002; 61:192-7. [PMID: 12000360 DOI: 10.1034/j.1399-0004.2002.610304.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Sanfilippo syndrome type A (mucopolysaccharidosis type IIIA; MPS IIIA) is caused by a deficiency of the lysosomal enzyme haparan N-sulphatase (NS). The genomic DNA segments of the NS gene from two Chinese patients with MPS IIIA were amplified by polymerase chain reaction, followed by DNA sequencing to study the molecular lesions. Four mutations (i.e. N42K, D235N, P293S and R377C) and five polymorphisms (i.e. IVS2-72A --> G, IVS2-26T --> C, IVS5+17C --> T, IVS5-37GC --> CTGT and R456H) were identified. Transfection of COS-7 cells with cDNA mutagenized to the corresponding mutations did not yield active enzyme, demonstrating the deleterious nature of the mutations. Western blot analysis revealed a 62-kDa precursor and 56-kDa mature forms for cells transfected with wild-type and polymorphic R456H enzymes. For cells transfected with mutant enzymes, the reduction in precursor and mature forms suggests an increased degradation of the mutant enzymes. The polymorphic DNA haplotype of the NS gene was analysed in 52 unrelated subjects. All five polymorphisms were in Hardy-Weinberg equilibrium. The strong non-random association among the five polymorphisms suggests little or no recombination in the NS gene.
Collapse
|
74
|
Chen CP, Shih JC, Tzen CY, Wang W. Three-dimensional ultrasound in the evaluation of complex anomalies associated with fetal ventral midline defects. ULTRASOUND IN OBSTETRICS & GYNECOLOGY : THE OFFICIAL JOURNAL OF THE INTERNATIONAL SOCIETY OF ULTRASOUND IN OBSTETRICS AND GYNECOLOGY 2002; 19:102-104. [PMID: 11851978 DOI: 10.1046/j.0960-7692.2001.00516.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
|
75
|
Chen CP, Tzen CY. Short-rib polydactyly syndrome type III (Verma-Naumoff) in a third-trimester fetus with unusual associations of epiglottic hypoplasia, renal cystic dysplasia, pyelectasia and oligohydramnios. Prenat Diagn 2001; 21:1101-2. [PMID: 11746172 DOI: 10.1002/pd.182] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|