Biomedical subjects

Ou Wang

Publications and source records attributed to Ou Wang.

6 recordsLinked to original sources

PubMed2026

Single-cell and spatial transcriptomics define a progenitor subpopulation and fibroinflammatory niche at the leading edge of parathyroid carcinoma.

Parathyroid carcinoma (PC) is a rare but clinically aggressive endocrine malignancy with limited treatment options and a poorly defined tumor microenvironment (TME). To elucidate its cellular heterogeneity and spatial architecture, we integrated single-cell and spatial transcriptomic profiling with whole-exome sequencing and multiplex immunohistochemistry on eight parathyroid neoplasm specimens, including PC, parathyroid adenoma, and atypical parathyroid tumor. We identified a distinct progenitor-like endocrine subpopulation (Ca-1) enriched in CDC73-mutant PC, exhibiting stem-like properties, elevated cell cycle activity, and pronounced genomic instability. Spatial mapping revealed that Ca-1 cells preferentially localize at the leading edge, forming a fibroinflammatory niche characterized by the enrichment of inflammatory cancer-associated fibroblasts (iCAFs) and SPP1+ macrophages. Within this niche, the dipeptidyl peptidase 4 (DPP4) is selectively expressed in Ca-1 cells and iCAFs, implicating a potential paracrine axis driving stromal remodeling and immunosuppression. These findings suggest that a spatially organized ecosystem may promote PC progression through TME remodeling and highlight the DPP4-CXCL2 axis as a candidate pathway for future investigation in aggressive parathyroid neoplasms.

Humans↗

PubMed2006

[Skeletal biomechanical properties improvement in ovariectomized osteoporotic rats of teriparatide was retarded by alendronate].

OBJECTIVE: To implore the effects of teriparatide (PTH) and alendronate (Alen) on skeletal biomechanical properties of ovariectomized (OVX) osteoporotic rats. METHODS: 70 female Wistar rats of 6 months were randomly divided into 7 groups: (1) Baseline: sacrificed at baseline; (2) OVXb: sacrificed in 6 weeks after OVX; (3) Sham operation; (4) OVXe: sacrificed 14 weeks after OVX; (5) PTH: 40 microg.kg(-1).d(-1); (6) Alen: 100 microg.kg(-1).d(-1); (7) A + P: PTH 40 microg.kg(-1).d(-1) and Alen 100 microg.kg(-1).d(-1). In group (5)-(7), different medicines were injected 5 times per week from 6th to 14th week after OVX. The cancellous biomechanical properties were measured with indentation test and the cortical properties were investigated with three-point bending test. RESULTS: (1) The can load and can stiff of distal femur of OVXb were significantly lower than those of baseline (P < 0.01). It is indicated that osteoporotic rat models with impaired bone strength were established. (2) The can load and can stiff of distal femur of PTH [(36.3 +/- 9.2) N, (160.7 +/- 48.0) N/mm(2)], Alen [(42.7 +/- 13.0) N, (122.9 +/- 35.6) N/mm(2)] and A + P [(44.3 +/- 18.2) N, (105.2 +/- 58.4) N/mm(2)] groups were all higher than those of OVXe [(19.5 +/- 8.5) N, (83.2 +/- 37.7) N/mm(2), P < 0.001 or P < 0.01]. In femoral shaft, maximal load and elastic load in PTH, Alen and A + P groups were higher than those of OVXe (P < 0.001, P < 0.01 or P < 0.05). (3) Can stiff in distal femur was higher in PTH than that in Alen and A + P groups (P < 0.05). Elastic load, maximal load and energy absorption in femoral shaft were higher in PTH and A + P groups than those in Alen group (P < 0.05), and maximal stress was higher in PTH than that in A + P and Alen group (P < 0.05). CONCLUSION: PTH and Alen were effective in improving the skeletal mechanical properties of OVX rats, but improvement in Alen and A + P was not so good as that in PTH group. It is indicated that anabolic effects of PTH was retarded by Alen's significant inhibition of bone turnover, therefore, PTH and Alen should not be utilized simultaneously.

Alendronate↗

PubMed2005

[Effects of teriparatide and alendronate on bone mineral density of osteoporotic rats].

OBJECTIVE: To investigate the effects of teriparatide (hPTH1-34, PTH) and alendronate (Alen) on bone turnover rate and bone mineral density (BMD) of ovariectomized (OVX) osteoporotic rats. METHODS: 70 female 6-month-old Wistar rats were randomly divided into 7 groups: (1) baseline group: killed immediately as baseline controls; (2) sham operation group: injected subcutaneously with normal saline (NS) as normal controls; (3) OVXb group: underwent ovarietomy (OVX) and killed 6 weeks after OVX as pre-therapeutic controls; (4) OVXe group: injected with NS subcutaneously and then sacrificed 14 weeks after OVX as controls by the end of treatment; (5) PTH group: PTH 40 microg.kg(-1).d(-1) was administered; (6) Alen group: Alen 100 microg.kg(-1).d(-1) was administered; (7) A + P group: PTH 40 microg.kg(-1).d(-1) and Alen 100microg.kg(-1).d(-1) were administered. In groups 4 approximately 7, different medicines were injected subcutaneously QD 5 times per week from the 6th week to the 14th week after OVX and then the rats were killed and their right femurs, lumbar vertebrae, and samples of blood and urine were collected. Absorptometry was used to measure the BMD of the right femur and lumbar vertebrae. The serum calcium, phosphate, creatinine, alanine transaminase, and alkaline phosphatase (ALP) activity were measured by automatic biochemical analysis. The bone resorption marker urine deoxypyridinoline/creatinine (UDpd/Cr) level was measured by enzyme-linked immuosorbent assay. RESULTS: Six weeks after OVX the ALP and UDpd/Cr levels in the OVXb group were 101 U/L +/- 59 U/L and (118 +/- 32) x 10(-6) respectively, both significantly higher than those of the baseline group (58 U/L +/- 10 U/L and (48 +/- 34) x 10(-6) respectively, both P < 0.01) and the BMD results of the OVXb group were all significantly lower than those in the baseline group (all P < 0.01), which indicated that an OVX osteoporotic rat model was established successfully. The ALP and UDpd/Cr levels of the Alen group were 61 U/L +/- 28 U/L and (17 +/- 39) x 10(-6), significantly lower than those of the PTH group 120 U/L +/- 36 U/L and (111 +/- 26) x 10(-6) respectively, both P < 0.01) and the UDpd/Cr levels of the A + P group were between those of the Alen group and those of the PTH group. The BMD levels of the femur and lumbar vertebrae of the PTH, Alen, and A + P groups were all significantly higher than those of the control groups (all P < 0.01), and were similar to or higher than those of the sham operation group without significant differences between the PTH and Alen groups. The BMD level of the lumber vertebrae of the A + P group were significantly higher than those in the PTH group (all P < 0.05), and the femoral BMD results of the A + P group were significantly higher than those in the PTH and Alen groups (all P < 0.01). CONCLUSION: PTH and Alen are all effective on osteoporosis. In particular, the combination of PTH and Alen is more effective on increasing the BMD level.

Alendronate↗

PubMed2005

[Genetic polymorphism of mitochondrial DNA in coding region in 16 ethnic populations of Yunnan].

The genetic polymorphism of mitochondrial DNA in the coding region in 16 ethnic populations of Yunnan was analyzed using PCR-RFLP in a total of 654 samples. Seventeen haplogroups were found, four of which were undefined haplogroups. Haplogroup distribution and Principal Component (PC) analysis showed that the ethnic groups descended from Bai-Yue tribe have B, F and M7 as the predominant haplogroups,which indicated their origination from southern China. Haplogroup A, D and N9 were predominant in the Mongolian ethnic group, reflecting their north-originated characteristics. The groups descended from Di-Qiang tribe shared the predominant haplogroups with both the south and north originated groups,which demonstrated that they inherit the maternal characteristics from both southern and northern populations. There is genetic difference among the populations in the same ethnic group and is usually smaller than that among the ethnic groups from different ancient tribes, but not necessarily smaller than that among the groups from the same tribe.

Asian People↗

PubMed2003

[Prospective study of pamidronate disodium in treatment of Paget's disease of bone].

OBJECTIVE: To determine the efficacy of pamidronate disodium (pamidronate) in treatment of Paget's disease of bone. METHODS: Intravenous drip of pamidronate was given at the dose of 30 - 60 mg per day for 2 - 3 weeks with a total dosage of 90 - 270 (168 +/- 84) mg to 5 patients with Paget's disease of bone, 2 males and 3 females, aged 27 - 74 (61 on average) with the course of disease of 4 - 48 years (24 years on average), all of them having multiple bone lesions, 2 being in grade 4 of pain assessment and bedridden and 3 being in grade 3 with impaired mobility. Pain assessment, biochemical markers of bone turnover, including serum alkaline phosphatase (ALP), carboxy-terminal propeptide of type I collagen (PICP), carboxy-terminal cross-linked telopeptide of type I collagen (ICTP) and urinary hydroxyproline (HOP), and side effects of pamidronate were observed before treatment, by the end of treatment, and 4, 12, 24, and 48 weeks after treatment. RESULTS: The Pagetic bone pain was significantly reduced by the end of treatment in all patients. The degree of pain assessment declined from grade 4 to grade 2 in 2 patients, and from grade 3 to grade 1 in 3 patients. The mobility was markedly improved without bone pain 12 weeks after treatment and relief of pain lasted for 1 year in all patients. Serum ALP, PICP, ICTP and urinary HOP concentrations were significant decrease by the end of treatment. Moreover, the mean percentage decreases for above biochemical markers at 12 and 24 weeks after treatment were 50% or over. The values of serum ALP, PICP, ICTP and urinary HOP decreased from 398 u/L (median), 818 ng/L (median), (29 +/- 14) ng/L and (71 +/- 16) mg/24 h urine respectively to 159 u/L, 129 ng/L, (12 +/- 4) ng/L and (34 +/- 7) mg/24 h urine respectively 48 weeks after treatment (all P < 0.05). Side effects, including a transient increase in body temperature, skin eruption and pruritus, and a transient increase of serum aspartate aminotransferase concentration, were negligible. CONCLUSION: Intravenous infusion of pamidronate is effective on Paget's disease of bone. Pamidronate of the dose of 90 - 270 mg administered within 2 - 3 weeks produces a year-long remission. Side effects of pamidronate are slight and transient.

Adult↗

PubMed2003

[Assessment of preoperative localization techniques for patients with primary hyperparathyroidism].

OBJECTIVE: To evaluate the sensitivity and usefulness of 99mTc-sestamibi scintigraphy (SS) and neck ultrasonography (US) as preoperative localization procedures in patients with primary hyperparathyroidism (pHPT). METHODS: 160 patients with proved pHPT in Peking Union Medical College Hospital from June 1983 to June 2002 were studied. There were 107 women(66.9%) and 53 men (33.1%), with a mean age of 38.9 years (10-73 years). 100 patients were underwent SS and 148 patients were underwent US prior to surgery, and the results were compared with operative and histological findings. RESULTS: The sensitivity of SS and US in localization of the enlarged parathyroid glands was 94.0% and 85.1% respectively, and the positive predictive value of SS and US was 100% and 89.1% respectively, the overall sensitivity was 98.9% by combination of SS and US. In solitary parathyroid adenomas group (n = 145), the sensitivity of SS and US was 93.3% and 84.7% respectively; There was no significant difference (P = 0.428) in sensitivity of SS between the parathyroid glands correctly identified and undetected in classical neck location as compared with ectopic parathyroid glands, whereas significantly (P = 0.026) influenced by the US sensitivity. CONCLUSIONS: Different sensitivity exit between SS and VS in preoperative localization in patients with pHPT undergoing parathyroidectomy. The combined use of SS and US could increase the sensitivity of localization technique. Ectopic parathyroid had no influence on the sensitivity of 99mTc-MIBI scanning, but decreased the sensitivity of ultrasonography. The size of parathyroid tumors had effects on the sensitivity of ultrasonography. Otherwise, various conditions causing SS false negative were observed. Some interfere factors should be excluded when SS negative results were encountered in clinical practice.

Adolescent↗