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Zhang M, Ma J, Gai J, Zhang Z, Wang H, Zhang Y, Ren Y, Lyu Y, Yan X. Magnetic anchor technique assisted laparoscopic cholecystectomy in swine. Sci Rep 2023; 13:4864. [PMID: 36964209 PMCID: PMC10039066 DOI: 10.1038/s41598-023-32157-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Accepted: 03/23/2023] [Indexed: 03/26/2023] Open
Abstract
Magnetic anchor device based on the principle of magnet heteropolar attraction can assist laparoscopic surgery and reduce abdominal wall trauma. This study explored the feasibility of use of our self-designed magnetic anchor device for reduced-port laparoscopic cholecystectomy (LC) through animal experiments. Twelve experimental pigs (15-20 kg) were randomly divided into study group (magnetic anchor technique assisted 2-port LC, n = 6) and control group (conventional 3-port LC, n = 6). Operative time, intraoperative blood loss, and postoperative complications were compared between the two groups. LC was successfully performed in all 12 pigs. There was no significant between-group difference with respect to operative time (study group: 35.83 ± 5.12 min; control group: 34.50 ± 5.13 min, P = 0.662) or intraoperative blood loss (< 50 mL per animal in both groups). In the experimental group, there was no malfunction of the magnetic anchoring device, the use process was smooth, and the tissue traction and surgical field exposure were satisfactory. There were no perioperative complications such as bile duct injury, bile leakage, or bleeding in both groups. We demonstrated the feasibility of use of the self-designed magnetic anchor device in reduced-port LC. The device has important clinical application value.
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Affiliation(s)
- Miaomiao Zhang
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, 277 West Yanta Road, Xi'an, 710061, Shaanxi, China
- National and Local Joint Engineering Research Center of Precision Surgery & Regenerative Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Jia Ma
- Department of Surgical Oncology, Shaanxi Provincial People's Hospital, Xi'an, Shaanxi, China
| | - Jingci Gai
- Qide College, Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Zhixuan Zhang
- Qide College, Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Haohua Wang
- National and Local Joint Engineering Research Center of Precision Surgery & Regenerative Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Yuhan Zhang
- Qide College, Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Yuxiang Ren
- Zonglian College, Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Yi Lyu
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, 277 West Yanta Road, Xi'an, 710061, Shaanxi, China.
- National and Local Joint Engineering Research Center of Precision Surgery & Regenerative Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China.
| | - Xiaopeng Yan
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, 277 West Yanta Road, Xi'an, 710061, Shaanxi, China.
- National and Local Joint Engineering Research Center of Precision Surgery & Regenerative Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China.
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Zhang M, Li Y, Pan M, Xu S, Gai J, Zhang H, An Y, Shi A, Lyu Y, Yan X. Creation of gastroenteric anastomosis through natural orifice in rats by magnetic compression technique. Surg Endosc 2022; 36:8170-8177. [PMID: 35501603 DOI: 10.1007/s00464-022-09257-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Accepted: 04/08/2022] [Indexed: 01/06/2023]
Abstract
BACKGROUND Being one of the core techniques of magnetic surgery, magnetic compression technique (MCT) has been used for digestive tract anastomosis reconstruction in experimental studies. This study verified the feasibility of gastroenteric anastomosis through natural orifice using MCT in rats. METHODS The parent and daughter magnets were designed and manufactured for oral and anal insertion in 20 Sprague-Dawley rats. After anesthesia, the parent magnet was inserted into the colon spleen area through the anus, and the daughter magnet was inserted into the stomach through the mouth. Then the two magnets were positioned to attract each other and bind together. The position of the two magnets was monitored using X-ray. The time required for the formation of the anastomosis and expulsion of the magnets were recorded. 2 weeks later, the animal was sacrificed and the anastomotic specimen was obtained which was observed under naked eye and microscope. RESULTS The gastroenteric anastomosis was successfully performed via natural orifices in 18 out of 20 rats. The mean time to construct the anastomosis was 3.78 ± 0.88 min. X-ray examination showed that the magnets were in the appropriate position in 17 rats. The magnets were excreted in 9.47 ± 1.62 days after surgery. The gross and microscopic examination of the specimen showed that the anastomoses were patent and the mucosa at the anastomotic was smooth. The mean bursting pressure of the anastomosis was 136.94 ± 6.79 mmHg. CONCLUSION It is feasible to perform gastroenteric anastomosis through natural orifices by MCT.
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Affiliation(s)
- Miaomiao Zhang
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, No. 277 West Yanta Road, Xi'an, 710061, Shaanxi, People's Republic of China.,National Local Joint Engineering Research Center for Precision Surgery & Regenerative Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, No. 277 West Yanta Road, Xi'an, 710061, Shaanxi, People's Republic of China
| | - Yixing Li
- Department of Thoracic Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, No. 277 West Yanta Road, Xi'an, 710061, Shaanxi, People's Republic of China
| | - Min Pan
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, No. 277 West Yanta Road, Xi'an, 710061, Shaanxi, People's Republic of China
| | - Shuqin Xu
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, No. 277 West Yanta Road, Xi'an, 710061, Shaanxi, People's Republic of China.,National Local Joint Engineering Research Center for Precision Surgery & Regenerative Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, No. 277 West Yanta Road, Xi'an, 710061, Shaanxi, People's Republic of China
| | - Jingci Gai
- Qide College, Xi'an Jiaotong University, No. 76 West Yanta Road, Xi'an, 710061, Shaanxi, People's Republic of China
| | - Hanzhi Zhang
- Qide College, Xi'an Jiaotong University, No. 76 West Yanta Road, Xi'an, 710061, Shaanxi, People's Republic of China
| | - Yingfeng An
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, No. 277 West Yanta Road, Xi'an, 710061, Shaanxi, People's Republic of China.,National Local Joint Engineering Research Center for Precision Surgery & Regenerative Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, No. 277 West Yanta Road, Xi'an, 710061, Shaanxi, People's Republic of China.,Shaanxi Provincial Centre for Disease Control and Prevention, No. 3 Jiandong Street, Xi'an, 710054, Shaanxi, People's Republic of China
| | - Aihua Shi
- National Local Joint Engineering Research Center for Precision Surgery & Regenerative Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, No. 277 West Yanta Road, Xi'an, 710061, Shaanxi, People's Republic of China
| | - Yi Lyu
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, No. 277 West Yanta Road, Xi'an, 710061, Shaanxi, People's Republic of China. .,National Local Joint Engineering Research Center for Precision Surgery & Regenerative Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, No. 277 West Yanta Road, Xi'an, 710061, Shaanxi, People's Republic of China.
| | - Xiaopeng Yan
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, No. 277 West Yanta Road, Xi'an, 710061, Shaanxi, People's Republic of China. .,National Local Joint Engineering Research Center for Precision Surgery & Regenerative Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, No. 277 West Yanta Road, Xi'an, 710061, Shaanxi, People's Republic of China.
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Zhang M, Mao J, Li Y, Xu S, Gai J, Lan T, Wang Y, Ren Y, Shi A, Lyu Y, Yan X. A novel magnetic compression technique for cystostomy in rabbits. Sci Rep 2022; 12:12209. [PMID: 35842556 PMCID: PMC9288424 DOI: 10.1038/s41598-022-16595-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2022] [Accepted: 07/12/2022] [Indexed: 12/30/2022] Open
Abstract
Magnetic compression technique (MCT) is a popular new anastomosis method. In this paper, we aimed to explore the feasibility of use of MCT for performing cystotomy in rabbits. The parent magnets and daughter magnets for rabbit cystostomy were designed and manufactured according to the anatomical characteristics of rabbit lower urinary tract. Twelve female New Zealand rabbits were used as animal models. After anesthesia, a daughter magnet was inserted into the bladder through the urethra, and the parent magnet was placed on the body surface projection of the bladder over the abdominal wall. The two magnets automatically attract each other. Postoperatively, the state of magnets was monitored daily, and the time when the magnets fell off was recorded. Cystostomy with MCT was successfully performed in all twelve rabbits. The mean operation time was 4.46 ± 0.75 min. The magnets fell off from the abdominal wall after a mean duration of 10.08 ± 1.62 days, resulting in the formation of bladder fistula. Macroscopic and microscopic examination showed that the fistula was well formed and unobstructed. The junction between bladder and abdominal wall was tight and smooth. We provide preliminary experimental evidence of the safety and feasibility of cystostomy based on MCT.
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Affiliation(s)
- Miaomiao Zhang
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, 277 West Yanta Road, Xi'an, 710061, Shaanxi, China.,National Local Joint Engineering Research Center for Precision Surgery & Regenerative Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, 76 West Yanta Road, Xi'an, 710061, Shaanxi, China
| | - Jianqi Mao
- Zonglian College, Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Yixing Li
- Department of Thoracic Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Shuqin Xu
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, 277 West Yanta Road, Xi'an, 710061, Shaanxi, China.,National Local Joint Engineering Research Center for Precision Surgery & Regenerative Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, 76 West Yanta Road, Xi'an, 710061, Shaanxi, China
| | - Jingci Gai
- Qide College, Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Ting Lan
- Qide College, Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Yirui Wang
- Qide College, Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Yuxiang Ren
- Zonglian College, Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Aihua Shi
- National Local Joint Engineering Research Center for Precision Surgery & Regenerative Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, 76 West Yanta Road, Xi'an, 710061, Shaanxi, China.
| | - Yi Lyu
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, 277 West Yanta Road, Xi'an, 710061, Shaanxi, China. .,National Local Joint Engineering Research Center for Precision Surgery & Regenerative Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, 76 West Yanta Road, Xi'an, 710061, Shaanxi, China.
| | - Xiaopeng Yan
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, 277 West Yanta Road, Xi'an, 710061, Shaanxi, China. .,National Local Joint Engineering Research Center for Precision Surgery & Regenerative Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, 76 West Yanta Road, Xi'an, 710061, Shaanxi, China.
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Zhang M, Gai J, Shi A, Lyu Y, Yan X. Feasibility Study of Magnetic Compression Technique for Colostomy in Rats. J Am Coll Surg 2021. [DOI: 10.1016/j.jamcollsurg.2021.08.067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Gai J, Zhang M, Shi A, Lyu Y, Yan X. Experimental Study on the Establishment of Rat Model of Gastric Flstula by Magnetic Compression Technique. J Am Coll Surg 2021. [DOI: 10.1016/j.jamcollsurg.2021.08.125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Wang F, Chen X, Gai J, Ma YL. [A preliminary investigation of the clinical characteristics of community acquired pneumonia with concomitant pulmonary embolism]. Zhonghua Jie He He Hu Xi Za Zhi 2021; 44:525-530. [PMID: 34102713 DOI: 10.3760/cma.j.cn112147-20210329-00208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To understanding the clinical characteristics of the patients of pneumonia concomitant with acute pulmonary embolism, and the early identification of high-risk patients. Methods: Retrospective analysis of hospitalized patients with confirmed diagnosis of community acquired pneumonia (CAP) with concomitant pulmonary embolism (PE) within a period of 5 years. Patients hospitalized with CAP alone in the same period were included in the control group in a ratio of 1∶2 according to the principle of gender and age. The demographic characteristics, clinical feature, laboratory examination, radiographic and other clinical data of these 2 groups of patients were studied. Statistical analysis was performed by Chi-square test, Kruskal-Wallis test and logistic regression. Results: Thirty-nine patients with CAP combined with PE and 78 patients with CAP alone were included. Compared to patients with CAP alone, dyspnea (21/39 vs 21/78, P=0.004), a history of heart disease (10/39 vs 8/78, P=0.031), and a history of connective tissue diseases (3/39 vs 0/78, P=0.035) were more common to seen in patients with CAP combined with PE. D-dimer [2 222(854, 3 539) ng/ml vs 295(168, 707) ng/ml, P=0.000], arterial PH value (7.5±0.5 vs 7.4±0.4, P=0.022), BNP [103.9(48.7, 236.8) pg/ml vs 98.4(44.8, 246.3) pg/ml, P=0.028] and incidence of lower extremity venous thrombosis (18/39 vs 3/41, P=0.000) were higher in patients with CAP combined with PE, while arterial partial pressure of CO2 [(35.3±6.2) mmHg vs (38.4±4.4) mmHg, P=0.009, 1 mmHg=0.133 kPa] was lower. Logistic regression analysis showed that D-dimer (P=0.000) and dyspnea (P=0.033) were associated with the risk of PE. Conclusion: When patients with CAP represent dyspnea or have a history of heart disease or connective tissue diseases concomitant PE should be considered for differential diagnosis. Determination of D-dimer, arterial PH value, arterial partial pressure of CO2, BNP and ultrasonography of lower extremities had important implications for the diagnosis of pneumonia complicated with acute pulmonary embolism.
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Affiliation(s)
- F Wang
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital,Beijing 100044, China
| | - X Chen
- Department of Respiratory, People's Hospital of Xiajin County, Dezhou 253200,China
| | - J Gai
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital,Beijing 100044, China
| | - Y L Ma
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital,Beijing 100044, China
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Root JM, Gai J, Sady MD, Vaughan CG, Madati PJ. Identifying Risks for Persistent Postconcussive Symptoms in a Pediatric Emergency Department: An Examination of a Clinical Risk Score. Arch Clin Neuropsychol 2021; 37:30-39. [PMID: 33993203 DOI: 10.1093/arclin/acab032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2020] [Revised: 01/13/2021] [Accepted: 04/20/2021] [Indexed: 11/14/2022] Open
Abstract
OBJECTIVE External examination of a clinical risk score to predict persistent postconcussive symptoms (PPCS) in a pediatric emergency department (ED). METHODS Prospective cohort study of 5- to 18-year-old patients diagnosed with an acute concussion. Risk factors were collected at diagnosis and participants (n = 85) were followed to determine PPCS 30 days postinjury. Univariate logistic regression analyses were completed to examine associations of risk factors with PPCS. RESULTS Headache and total clinical risk score were associated with increased odds of PPCS in the univariate analyses, OR 3.37 (95% CI 1.02, 11.10) and OR 1.25 (95% CI 1.02, 1.52), respectively. Additionally, teenage age group, history of prolonged concussions, and risk group trended toward association with PPCS, OR 4.79 (95% CI 0.93, 24.7), OR 3.41 (95% CI 0.88, 13.20), and OR 2.23 (95% CI 0.88, 5.66), respectively. CONCLUSION Our study supports the use of multiple variables of a clinical risk score to assist with ED risk stratification for pediatric patients at risk for PPCS.
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Affiliation(s)
- J M Root
- Division of Emergency Medicine, Children's National Health System, Washington, DC, USA
| | - J Gai
- Children's Research Institute, Children's National Health System, Washington, DC, USA
| | - M D Sady
- Division of Pediatric Neuropsychology, Children's National Health System, Washington, DC, USA
| | - C G Vaughan
- Division of Pediatric Neuropsychology, Children's National Health System, Washington, DC, USA
| | - P J Madati
- Division of Emergency Medicine, Children's National Health System, Washington, DC, USA
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Wang J, Gai J. [Identification of major gene and polygene mixed inheritance model and estimation of genetic parameters of a quantitative trait from F2 progeny]. Yi Chuan Xue Bao 1997; 24:432-40. [PMID: 9494295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
It has been proved by many field experiments and QTL mapping results that among genes affecting some quantitative traits there are some major genes with larger genetic effect and some polygenes with smaller genetic effect. For such traits, the distribution of segregating population demonstrates multimodality, and this is the characteristic of the mixture of more than one distributions. Mixture distribution models have been used extensively as models in a wide variety of practical situations where data can be viewed as arising from two or more populations mixed in certain proportions. Akaike's Information Criterion(AIC) has been used to identify the existence of major genes affecting quantitative traits. Under the existence of major genes, the genetic effects of these genes and their genetic variance were estimated through segregation analysis. The genotype of major gene of F2 individuals of were determined by clustering using Bayesian criterion. With P1, P2, F1 and F2 populations, the likelihood ratio test was used to test the existence of polygenes. In the end, the inheritance of soybean flowering date is analyzed. One major gene was found in F2 population derived from Guludou x Shanghaihongmangzao.
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Affiliation(s)
- J Wang
- Soybean Research Institute, Nanjing Agricultural University
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Wrather JA, Anderson TR, Arsyad DM, Gai J, Ploper LD, Porta-Puglia A, Ram HH, Yorinori JT. Soybean Disease Loss Estimates for the Top 10 Soybean Producing Countries in 1994. Plant Dis 1997; 81:107-110. [PMID: 30870925 DOI: 10.1094/pdis.1997.81.1.107] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Soybean disease loss estimates were compiled for the 1994 harvested crop from the 10 countries with the greatest soybean production. The objective was to document the major soybean disease problems in these countries and any recent changes in the severity of individual soybean diseases. Total yield losses caused by Heterodera glycines in these 10 countries were greater than those caused by any other disease. Next in order of importance were stem canker, brown spot, and charcoal rot. The total yield loss due to disease during 1994 in these countries was 14.99 million metric tons, valued at $3.31 billion. Methods used to estimate soybean disease losses were field surveys, plant disease diagnostic clinic samples, variety trial data, information from field workers and university extension staff, research plots, grower demonstrations, and private crop consultant reports. Yield loss estimates due to a particular disease varied by country. For example, yield losses due to rust were reported from China and Indonesia, but no losses due to this disease were reported from any of the remaining eight countries. Soybean disease control research and extension efforts are needed to provide more effective preventive and therapeutic disease management strategies and systems to producers.
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Affiliation(s)
- J A Wrather
- University of Missouri-Delta Center, P. O. Box 160, Portageville 63873
| | - T R Anderson
- Harrow Research Center, Harrow, Ontario N0R 1 G0 Canada
| | - D M Arsyad
- Ministry of Agriculture, Agency for Agriculture Research and Development, BORIF, Jalan Tentara Pelajar No. 3A, Bogor 16111, Indonesia
| | - J Gai
- Soybean Research Institute, Nanjing Agricultural University, Weigang, Nanjing, Jiangsu 210014, China
| | - L D Ploper
- Estación Experimental Agroindustrial Obispo Colombres, Casilla de Correo 9, 4101 Las Talitas, Tucumán, R. Argentina
| | - A Porta-Puglia
- Istituto Sperimentale per la Patologia Vegetale, Via Bertero 22, 00156 Roma, Italy
| | - H H Ram
- G. B. Pant University of Agriculture & Technology, Pantnagar - 263145, U. P., India
| | - J T Yorinori
- CNPSoja - EMBRAPA, Caixa postal 231, 86001-970 Londrina - Paraná - Brasil
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Arnone M, Baroni M, Gai J, Guzzi U, Desclaux M, Keane P, LeFur G, Soubrié P. Effect of SR 59026A, a new 5-HT(1A) receptor agonist, on sexual activity in male rats. Behav Pharmacol 1995; 6:276-282. [PMID: 11224336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Abstract
The effect of SR 59026A, a new selective 5-HT(1A) receptor agonist, was evaluated on sexual behaviour of male rats in different experimental conditions. SR 59026A (1-10mg/kg p.o.) stimulated the copulatory behaviour of sexually experienced rats, as evidenced by a decrease in the number of pre-ejaculatory mounts and intromissions and a shortening of the ejaculation latency. SR 59026A also facilitated the sexual behaviour of naive male rats characterized by a low level of sexual performance: over the same dose range, the percentage of naive males that copulated was significantly increased and the ejaculation latency reduced. In experiments designed to evaluate the onset of sexual satiation, SR 59026A (1 and 3mg/kg) increased significantly the number of ejaculations and delayed the time of sexual satiation. Finally, in agreement with studies on other 5-HT(1A) receptor agonists, SR 59026A did not modify the occurrence of spontaneous erections in isolated male rats. Therefore, the present study shows that SR 59026A improves the sexual performance of male rats in a number of different experimental models, and the compound may prove to be of interest for the treatment of certain states of human male sexual dysfunction.
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Affiliation(s)
- M. Arnone
- Sanofi Recherche, 195 route d'Espagne, 31036 Toulouse Cedex, France
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