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Lee KG, Jeong JH, Joo JE, Kim HB. Supra-ampullary duodenectomy in a patient with positive distal resection margin after subtotal gastrectomy for gastric cancer: a case report. KOREAN JOURNAL OF CLINICAL ONCOLOGY 2023; 19:38-42. [PMID: 37449398 DOI: 10.14216/kjco.23007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2023] [Accepted: 06/18/2023] [Indexed: 07/18/2023]
Abstract
Resection margin involvement after curative intent resection for gastric cancer results in a poor prognosis and deprives the patient of the chance for a cure. Reoperation to achieve an R0 status should guarantee tolerable morbidity and achievement of negative margins. We performed laparoscopic distal gastrectomy with extracorporeal Billroth II reconstruction in a 56-year-old woman with gastric cancer following neoadjuvant chemotherapy. Scattered cancer cells were observed in the proximal and distal resection margins on immunohistochemical staining for cytokeratin. Two weeks postoperatively, remnant total gastrectomy and supra-ampullary duodenectomy were performed. Before reoperation, percutaneous transhepatic gallbladder drainage and angiocatheter placement outside the ampulla of Vater (AoV) via the cystic duct were performed to avoid pancreaticoduodenectomy and to obtain the maximal distal margin. Duodenal transection was performed 1 cm above the AoV. The resected duodenum was 4 cm in length. The patient had no postoperative complications and received adjuvant chemotherapy 1 month after the reoperation.
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Affiliation(s)
- Kyung-Goo Lee
- Department of Surgery, Myongji Hospital, Hanyang University College of Medicine, Goyang, Korea
| | - Jin Ho Jeong
- Department of Surgery, Myongji Hospital, Hanyang University College of Medicine, Goyang, Korea
| | - Jong Eun Joo
- Department of Pathology, Myongji Hospital, Hanyang University College of Medicine, Goyang, Korea
| | - Hyun Beom Kim
- Department of Radiology, Myongji Hospital, Hanyang University College of Medicine, Goyang, Korea
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Wang F, Zhang X, Li Y, Tang L, Qu X, Ying J, Zhang J, Sun L, Lin R, Qiu H, Wang C, Qiu M, Cai M, Wu Q, Liu H, Guan W, Zhou A, Zhang Y, Liu T, Bi F, Yuan X, Rao S, Xin Y, Sheng W, Xu H, Li G, Ji J, Zhou Z, Liang H, Zhang Y, Jin J, Shen L, Li J, Xu R. The Chinese Society of Clinical Oncology (CSCO): Clinical guidelines for the diagnosis and treatment of gastric cancer, 2021. Cancer Commun (Lond) 2021; 41:747-795. [PMID: 34197702 PMCID: PMC8360643 DOI: 10.1002/cac2.12193] [Citation(s) in RCA: 350] [Impact Index Per Article: 116.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2021] [Revised: 06/21/2021] [Accepted: 06/23/2021] [Indexed: 02/05/2023] Open
Abstract
There exist differences in the epidemiological characteristics, clinicopathological features, tumor biological characteristics, treatment patterns, and drug selections between gastric cancer patients from the Eastern and Western countries. The Chinese Society of Clinical Oncology (CSCO) has organized a panel of senior experts specializing in all sub-specialties of gastric cancer to compile a clinical guideline for the diagnosis and treatment of gastric cancer since 2016 and renews it annually. Taking into account regional differences, giving full consideration to the accessibility of diagnosis and treatment resources, these experts have conducted expert consensus judgment on relevant evidence and made various grades of recommendations for the clinical diagnosis and treatment of gastric cancer to reflect the value of cancer treatment and meeting health economic indexes in China. The 2021 CSCO Clinical Practice Guidelines for Gastric Cancer covers the diagnosis, treatment, follow-up, and screening of gastric cancer. Based on the 2020 version of the CSCO Chinese Gastric Cancer guidelines, this updated guideline integrates the results of major clinical studies from China and overseas for the past year, focused on the inclusion of research data from the Chinese population for more personalized and clinically relevant recommendations. For the comprehensive treatment of non-metastatic gastric cancer, attentions were paid to neoadjuvant treatment. The value of perioperative chemotherapy is gradually becoming clearer and its recommendation level has been updated. For the comprehensive treatment of metastatic gastric cancer, recommendations for immunotherapy were included, and immune checkpoint inhibitors from third-line to the first-line of treatment for different patient groups with detailed notes are provided.
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3
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Juez LD, Barranquero AG, Priego P, Cuadrado M, Blázquez L, Sánchez-Picot S, Fernández-Cebrián JM, Galindo J. Influence of positive margins on tumour recurrence and overall survival after gastrectomy for gastric cancer. ANZ J Surg 2021; 91:E465-E473. [PMID: 34013576 DOI: 10.1111/ans.16937] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2020] [Revised: 04/24/2021] [Accepted: 04/27/2021] [Indexed: 12/21/2022]
Abstract
BACKGROUND Incidence of positive surgical margins after curative gastrectomy ranges from 1% to 20%. It has been suggested that positive surgical margin is an adverse prognosis factor, with a higher local recurrence and worse overall survival (OS). However, the management of these patients remains unclear. METHODS A total of 267 patients who underwent gastrectomy with curative intent between January 2010 and December 2018 in our centre were enrolled in this study. Post-operative histological analysis revealed positive resection margins in 18 patients (8%). Clinicopathological features and outcome of patients undergoing gastrectomy with negative and positive margins were compared. RESULTS Patients with positive margins were associated with higher American Joint Committee on Cancer (AJCC) stage, T stage, N stage, median number of positive nodes, diffuse Lauren type, whole stomach involved and poorly differentiated tumours. Local recurrence was described in 50% of cases with positive margins. The multivariate analysis demonstrated that the TNM stage was the only independent prognostic factor associated with recurrence. OS for positive margins at 1, 3 and 5 years was 75%, 57% and 26%, respectively. The median survival in patients with positive margins was 38.33 versus 81.17 months for R0 patients (p = 0.027). Multivariate analysis showed that age (hazard ratio [HR] 1.041, 95% confidence interval [CI] 1.02-1.07, sex (HR 2.00, 95% CI 1.22-3.30) and TNM stage (p < 0.001) were independent factors of OS. CONCLUSION Positive resection margin was an indication of advanced and more aggressive disease rather than an independent prognosis factor for OS or recurrence in gastric cancer.
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Affiliation(s)
- Luz Divina Juez
- Division of Esophagogastric and Bariatric Surgery, Department of General and Digestive Surgery, Hospital Universitario Ramón y Cajal, Madrid, Spain.,Facultad de Medicina, Universidad de Alcalá, IRYCIS, Madrid, Spain
| | - Alberto G Barranquero
- Division of Esophagogastric and Bariatric Surgery, Department of General and Digestive Surgery, Hospital Universitario Ramón y Cajal, Madrid, Spain.,Facultad de Medicina, Universidad de Alcalá, IRYCIS, Madrid, Spain
| | - Pablo Priego
- Division of Esophagogastric and Bariatric Surgery, Department of General and Digestive Surgery, Hospital Universitario Ramón y Cajal, Madrid, Spain.,Facultad de Medicina, Universidad de Alcalá, IRYCIS, Madrid, Spain
| | - Marta Cuadrado
- Division of Esophagogastric and Bariatric Surgery, Department of General and Digestive Surgery, Hospital Universitario Ramón y Cajal, Madrid, Spain.,Facultad de Medicina, Universidad de Alcalá, IRYCIS, Madrid, Spain
| | - Luis Blázquez
- Division of Esophagogastric and Bariatric Surgery, Department of General and Digestive Surgery, Hospital Universitario Ramón y Cajal, Madrid, Spain.,Facultad de Medicina, Universidad de Alcalá, IRYCIS, Madrid, Spain
| | - Silvia Sánchez-Picot
- Division of Esophagogastric and Bariatric Surgery, Department of General and Digestive Surgery, Hospital Universitario Ramón y Cajal, Madrid, Spain.,Facultad de Medicina, Universidad de Alcalá, IRYCIS, Madrid, Spain
| | - José María Fernández-Cebrián
- Division of Esophagogastric and Bariatric Surgery, Department of General and Digestive Surgery, Hospital Universitario Ramón y Cajal, Madrid, Spain.,Facultad de Medicina, Universidad de Alcalá, IRYCIS, Madrid, Spain
| | - Julio Galindo
- Division of Esophagogastric and Bariatric Surgery, Department of General and Digestive Surgery, Hospital Universitario Ramón y Cajal, Madrid, Spain.,Facultad de Medicina, Universidad de Alcalá, IRYCIS, Madrid, Spain
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Sato M, Endo K, Harada A, Shijo M. A case of successful conversion surgery for gastric cancer with direct invasion to pancreatic head. J Surg Case Rep 2021; 2021:rjab186. [PMID: 34025973 PMCID: PMC8130874 DOI: 10.1093/jscr/rjab186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Accepted: 04/18/2021] [Indexed: 11/29/2022] Open
Abstract
We experienced the case of successful conversion to distal gastrectomy for gastric cancer with direct invasion to the pancreatic head after the pre-operative chemotherapy. Esophagogastroduodenoscopy in a 66-year-old man revealed a tumor at the gastric antrum. Abdominal computed tomography (CT) showed that the tumor of the antrum was in contact with the pancreatic head. A biopsy of the tumor confirmed an adenocarcinoma and an overexpression of HER2 (3+). Staging laparoscopy showed the direct invasion of the gastric tumor to the pancreatic head. The patient received S-1, oxaliplatin and trastuzumab. After the pre-operative chemotherapy, CT showed a significantly shrinking tumor detached from the pancreatic head. Subsequently, distal gastrectomy was performed. Intra-operative exploration showed that the gastric tumor separated from the pancreatic head. The accumulation of trials for pre-operative chemotherapy for local advanced gastric cancer is expected.
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Affiliation(s)
- Manabu Sato
- Department of Surgery, Shiogama City Hospital, Shiogama, Japan
| | - Koujin Endo
- Department of Surgery, JCHO Sendai South Hospital, Sendai, Japan
| | - Akihiko Harada
- Department of Surgery, JCHO Sendai South Hospital, Sendai, Japan
| | - Masahiro Shijo
- Department of Surgery, JCHO Sendai South Hospital, Sendai, Japan
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Kazi M, Shrikhande SV, Chaudhari VA, Kurunkar S, Bhandare MS. Emergency Radical Gastrectomy with Pancreatico-duodenectomy for a Recent Onset Perforation of Locally Advanced Gastric Cancer with Pancreatic Head Involvement-Exceptional but a Definite Option. Indian J Surg Oncol 2020; 11:278-281. [PMID: 33364719 DOI: 10.1007/s13193-020-01189-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2020] [Accepted: 08/19/2020] [Indexed: 11/26/2022] Open
Abstract
Gastric cancer perforations are rare events with management options ranging from lavage and perforation closure, to resection. Usual aim is to perform a damage control procedure, and very few patients are suitable for a curative resection. We report the first case of emergency gastrectomy with pancreatico-duodenectomy performed in emergency for a perforated stomach cancer with pancreatic head invasion. The patient was a 32-year-old gentleman who presented with a perforated antro-pyloric cancer with infiltration of pancreatic head. Emergency radical gastrectomy with en-bloc pancreatico-duodenectomy was performed with due considerations to the patient and disease factors. He had an uneventful postoperative recovery and remains disease free at 18 months of follow-up after having received adjuvant chemotherapy. Curative resections should be selectively offered in advanced (T4b) gastric cancers in patients without multiple adverse factors. In an emergency situation with perforation peritonitis, if the magnitude of resection is deemed unlikely to add to significant morbidity of the surgery, taking multiple factors into consideration, an R0 resection can offer a large survival benefit in such settings.
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Affiliation(s)
- Mufaddal Kazi
- Department of Surgical Oncology, Tata Memorial Hospital, Homi Bhabha National Institute, Mumbai, India
| | | | - Vikram A Chaudhari
- Department Surgical Oncology, Tata Memorial Hospital, Homi Bhabha National Institute, Mumbai, Maharashtra 400012 India
| | - Sagar Kurunkar
- Apple Saraswati Multi-specialty Hospital, Kolhapur, India
| | - Manish S Bhandare
- Department Surgical Oncology, Tata Memorial Hospital, Homi Bhabha National Institute, Mumbai, Maharashtra 400012 India
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Surgery for Gastric Cancer: State of the Art. Indian J Surg 2020. [DOI: 10.1007/s12262-019-02061-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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7
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Lee CM, Yoon SY, Park S, Park SH. Laparoscopic Whipple's Operation for Locally Advanced Gastric Cancer Invading the Pancreas and Duodenum: a Case Report. J Gastric Cancer 2020; 19:484-492. [PMID: 31897350 PMCID: PMC6928087 DOI: 10.5230/jgc.2019.19.e24] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Revised: 06/24/2019] [Accepted: 07/10/2019] [Indexed: 12/15/2022] Open
Abstract
Few surgeons have adopted pancreaticoduodenectomy (PD) for the treatment of advanced gastric cancer (AGC) invading the pancreas or duodenum because it remains controversial whether its prognostic benefits outweigh the high morbidity rates in such advanced cases. However, recent technical advances have revived diverse surgical procedures in minimally invasive approaches. Inspired by this trend, laparoscopic PD procedures have been performed for AGC in our institute since 2014. We recently performed a laparoscopic Whipple's operation in a case of cT4b gastric cancer with invasion of the pancreatic head and duodenum.
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Affiliation(s)
- Chang Min Lee
- Department of Surgery, Korea University Medical Center, Korea University College of Medicine, Seoul, Korea
| | - Sam-Youl Yoon
- Department of Surgery, Korea University Medical Center, Korea University College of Medicine, Seoul, Korea
| | - Sungsoo Park
- Department of Surgery, Korea University Medical Center, Korea University College of Medicine, Seoul, Korea
| | - Seong-Heum Park
- Department of Surgery, Korea University Medical Center, Korea University College of Medicine, Seoul, Korea
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8
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Jiao J, Zhang S. Long non‑coding RNA MEG‑3 suppresses gastric carcinoma cell growth, invasion and migration via EMT regulation. Mol Med Rep 2019; 20:2685-2693. [PMID: 31524253 PMCID: PMC6691256 DOI: 10.3892/mmr.2019.10515] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Accepted: 10/29/2018] [Indexed: 12/20/2022] Open
Abstract
Gastric carcinoma is one of the most frequently diagnosed gastrointestinal tumors. Long non-coding RNAs (lncRNAs) are broadly defined as endogenous cellular non-coding RNA molecules. Studies have demonstrated that they may be associated with human cancer progression. In the present study, the role of lncRNA-maternally expressed gene 3 (MEG3) in the progression of gastric carcinoma cells was investigated in vitro and in vivo. It was demonstrated that lncRNA-MEG3 expression was downregulated in gastric carcinoma cells compared with normal gastric cells. lncRNA-MEG3 transfection increased E-cadherin expression and markedly inhibited gastric carcinoma cell growth, migration and invasion. Flow cytometric analysis revealed that lncRNA-MEG3 transfection promoted the apoptosis of gastric carcinoma cells. Western blot analysis demonstrated that lncRNA-MEG3 transfection inhibited the expression of anti-apoptotic proteins B cell lymphoma-2 (Bcl-2) and Bcl-2-like protein 2 and increased the expression of pro-apoptotic proteins caspase-3 and caspase-9 in gastric carcinoma cells. lncRNA-MEG3 transfection upregulated the expression of epithelial marker E-cadherin and inhibited the expression of mesenchymal markers vimentin and fibronectin in gastric carcinoma cells, which suggested that lncRNA-MEG3 inhibited epithelial-mesenchymal transition (EMT), which may subsequently inhibit progression in gastric carcinoma cells. The present study also revealed that lncRNA-MEG3 transfection suppressed tumor growth mainly by decreasing the expression of vascular endothelial growth factor and increasing the expression of Bcl-2 in vivo. In conclusion, these results indicated that lncRNA-MEG3 may regulate EMT-associated signaling pathways and has the potential as a therapeutic target in gastric carcinoma.
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Affiliation(s)
- Junquan Jiao
- Center for Cancer Diagnosis and Treatment, Shangluo Central Hospital, Shangluo, Shaanxi 72600, P.R. China
| | - Shaobo Zhang
- Department of General Surgery, Hong Hui Hospital, Xi'an Jiao Tong University, Xi'an, Shaanxi 710049, P.R. China
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Acosta-Mérida M, Ortiz-López D, Callejón-Cara M, Rahy-Martín A, Marchena-Gómez J. Gastric adenocarcinoma: Should pancreaticoduodenectomy be associated with intraoperative suspicion of infiltration? REVISTA DE GASTROENTEROLOGÍA DE MÉXICO (ENGLISH EDITION) 2019. [DOI: 10.1016/j.rgmxen.2018.09.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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10
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Acosta-Mérida MA, Ortiz-López D, Callejón-Cara MM, Rahy-Martín A, Marchena-Gómez J. Gastric adenocarcinoma: Should pancreaticoduodenectomy be associated with intraoperative suspicion of infiltration? REVISTA DE GASTROENTEROLOGÍA DE MÉXICO 2018; 84:405-407. [PMID: 30119967 DOI: 10.1016/j.rgmx.2018.06.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Revised: 04/21/2018] [Accepted: 06/14/2018] [Indexed: 10/28/2022]
Affiliation(s)
- M A Acosta-Mérida
- Servicio de Cirugía General y Aparato Digestivo, Hospital Universitario de Gran Canaria Dr. Negrín, Las Palmas de Gran Canaria, Las Palmas, España.
| | - D Ortiz-López
- Servicio de Cirugía General y Aparato Digestivo, Hospital Universitario de Gran Canaria Dr. Negrín, Las Palmas de Gran Canaria, Las Palmas, España
| | - M M Callejón-Cara
- Servicio de Cirugía General y Aparato Digestivo, Hospital Universitario de Gran Canaria Dr. Negrín, Las Palmas de Gran Canaria, Las Palmas, España
| | - A Rahy-Martín
- Servicio de Cirugía General y Aparato Digestivo, Hospital Universitario de Gran Canaria Dr. Negrín, Las Palmas de Gran Canaria, Las Palmas, España
| | - J Marchena-Gómez
- Servicio de Cirugía General y Aparato Digestivo, Hospital Universitario de Gran Canaria Dr. Negrín, Las Palmas de Gran Canaria, Las Palmas, España
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Morgagni P, La Barba G, Colciago E, Vittimberga G, Ercolani G. Resection line involvement after gastric cancer treatment: handle with care. Updates Surg 2018; 70:213-223. [DOI: 10.1007/s13304-018-0552-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2017] [Accepted: 06/01/2018] [Indexed: 02/06/2023]
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Abstract
OBJECTIVE Defining processes of care, which are appropriate and necessary for management of gastric cancer (GC), is an important step toward improving outcomes. METHODS Using a RAND/UCLA Appropriateness Method, an international multidisciplinary expert panel created 22 statements reflecting optimal management. All statements were scored for appropriateness and necessity. RESULTS The following tenets were scored appropriate and necessary: (1) preoperative staging by computed tomography of abdomen/pelvis; (2) positron-emission tomographic scans not routinely indicated; (3) consideration for adjuvant therapy; (4) further clinical trials; (5) multidisciplinary decision making; (6) sufficient support at hospitals; (7) assessment of 16 or more lymph nodes (LNs); (8) in metastatic disease, surgery only for palliation of major symptoms; (9) surgeons experienced in GC management; (10) and surgeons experienced in both GC management and advanced laparoscopic surgery for laparoscopic resection. The following were scored appropriate, but of indeterminate necessity: (1) diagnostic laparoscopy before treatment; (2) a multidisciplinary approach to linitis plastica; (3) genetic assessment for diffuse GC and family history, or age less than 45 years; (4) endoscopic removal of select T1aN0 lesions; (5) D2 LN dissection in curative intent cases; (6) D1 LN dissection for early GC or patients with comorbidities; (7) frozen section analysis of margins; (8) nonemergent cases performed in a hospital with a volume of more than 15 resections per year; and (9) by a surgeon with more than 6 resection per year. CONCLUSIONS The expert panel has created 22 statements for the perioperative management of GC patients, to provide guidance to clinicians and improve the care received by patients.
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Brar S, Law C, McLeod R, Helyer L, Swallow C, Paszat L, Seevaratnam R, Cardoso R, Dixon M, Mahar A, Lourenco LG, Yohanathan L, Bocicariu A, Bekaii-Saab T, Chau I, Church N, Coit D, Crane CH, Earle C, Mansfield P, Marcon N, Miner T, Noh SH, Porter G, Posner MC, Prachand V, Sano T, van de Velde C, Wong S, Coburn N. Defining surgical quality in gastric cancer: a RAND/UCLA appropriateness study. J Am Coll Surg 2013; 217:347-57.e1. [PMID: 23664139 DOI: 10.1016/j.jamcollsurg.2013.01.067] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2012] [Revised: 11/29/2012] [Accepted: 01/29/2013] [Indexed: 12/19/2022]
Affiliation(s)
- Savtaj Brar
- Department of Surgery, University of Toronto, Toronto, Ontario, Canada
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Geerts H, Roberts P, Spiros A, Carr R. A strategy for developing new treatment paradigms for neuropsychiatric and neurocognitive symptoms in Alzheimer's disease. Front Pharmacol 2013; 4:47. [PMID: 23596419 PMCID: PMC3627142 DOI: 10.3389/fphar.2013.00047] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2012] [Accepted: 03/28/2013] [Indexed: 01/01/2023] Open
Abstract
Successful disease modifying drug development for Alzheimer's disease (AD) has hit a roadblock with the recent failures of amyloid-based therapies, highlighting the translational disconnect between preclinical animal models and clinical outcome. Although disease modifying therapies are the Holy Grail to pursue, symptomatic therapies addressing cognitive and neuropsychiatric aspects of the disease are also extremely important for the quality of life of patients and caregivers. Despite the fact that neuropsychiatric problems in Alzheimer patients are the major driver for costs associated with institutionalization, no good preclinical animal models with predictive validity have been documented. We propose a combination of quantitative systems pharmacology (QSP), phenotypic screening and preclinical animal models as a novel strategy for addressing the bottleneck in both cognitive and neuropsychiatric drug discovery and development for AD. Preclinical animal models such as transgene rats documenting changes in neurotransmitters with tau and amyloid pathology will provide key information that together with human imaging, pathology and clinical data will inform the virtual patient model. In this way QSP modeling can partially overcome the translational disconnect and reduce the attrition of drug programs in the clinical setting. This approach is different from target driven drug discovery as it aims to restore emergent properties of the networks and therefore likely will identify multitarget drugs. We review examples on how this hybrid humanized QSP approach has been helpful in predicting clinical outcomes in schizophrenia treatment and cognitive impairment in AD and expand on how this strategy could be applied to neuropsychiatric symptoms in dementia. We believe such an innovative approach when used carefully could change the Research and Development paradigm for symptomatic treatment in AD.
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Affiliation(s)
- Hugo Geerts
- In Silico Biosciences Berwyn, PA, USA ; Perelman School of Medicine, University of Pennsylvania Philadelphia, PA, USA
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