Identification of potential predictors and surrogates for the selection of patients who may benefit from the use of Racotumomab, as switch maintenance therapy, in patients with non-small cell lung cancer, stages IIIA, IIIB and IV.

Start Date09 Jul 2018

Sponsor / Collaborator

Center For Molecular Immunology

RPCEC00000207 / SuspendedPhase 2/3IIT

Open randomized controlled clinical trial in patients with non-small cell lung cancer, stage IB, II and IIIA, treated or not with VAXIRA®, after surgery and adjuvant cisplatin-based chemotherapy

Start Date20 Dec 2015

Sponsor / Collaborator

Center For Molecular Immunology

100 Clinical Results associated with GM3

100 Translational Medicine associated with GM3

0 Patents (Medical) associated with GM3

2,115

Literatures (Medical) associated with GM3

01 Nov 2024·Pigment Cell & Melanoma Research

ToF‐SIMS imaging reveals changes in tumor cell lipids during metastatic progression of melanoma

Article

Author: Zaar, Oscar ; Cehajic, Kevin Sjögren ; Bagge, Roger Olofsson ; Fletcher, John S. ; Katsarelias, Dimitrios ; Paoli, John ; Neittaanmäki, Noora ; Nilsson, Kelly Dimovska

AbstractMost melanomas progress from radial to vertical growth phase before spreading locoregionally and distally. Much is still unknown about the metabolic changes in the tumor cells and their microenvironment during this metastatic progression. We aimed to gain new insight into the molecular characteristics of melanoma in regard to spatial lipidomics to deliver new knowledge regarding tumor metastatic progression. We included 10 fresh tumor samples from 10 patients including two in situ melanomas, two invasive primary melanomas, and six metastatic melanomas (four in‐transit metastases and two distant metastases). In addition, we analyzed four healthy skin controls from the same patients. Time‐of‐flight imaging secondary ion mass spectrometry (ToF‐SIMS) enabled detailed spatial‐lipidomics that could be directly correlated with conventional histopathological analysis of consecutive H&E‐stained tissue sections. Significant differences in the lipid profiles were found in primary compared to metastatic melanomas, notably an increase in phosphatidylethanolamine lipids relative to phosphatidylinositol lipids and an increase in GM3 gangliosides in the metastatic samples. Furthermore, analysis of the data from in transit versus distant metastases samples highlighted that specific phospholipids, and a difference in the long versus shorter chain GM3 gangliosides, discriminated the metastatic routes. Further studies are warranted to verify these preliminary findings. Lipidomic changes could serve as a novel biomarker for tumor progression and even serve as a target for novel treatments. Furthermore, analyzing the lipid profiles could help to differentiate between primary and metastatic melanomas in challenging cases.

01 Oct 2024·Analytical and Bioanalytical Chemistry

Establishment of a targeted analysis method for gangliosides in mouse tissues by HILIC-ESI–MS/MS

Article

Author: Xue, Changhu ; Cong, Peixu ; Meng, Nan ; Ma, Yingxu ; Yang, Shuo ; Xu, Jie ; Song, Yu ; Wang, Xiaoxu

Gangliosides play an imperative role in cell signaling, neuronal recovery, apoptosis, and other physiological processes. For example, GM₃ can regulate hypothalamic leptin resistance and control energy homeostasis, GD₃ can mediate cell proliferation and differentiation and induce apoptosis, and GQ1b can stimulate neurogenesis. Therefore, the present study sought to establish and optimize the targeted analysis method for ganglioside subclasses and their molecular species using hydrophilic interaction liquid chromatography-triple quadrupole-MS/MS (HILIC-QQQ-MS/MS). Additionally, the fragmentation pattern of different ganglioside subclasses and their retention time patterns were analyzed, providing more accurate qualitative results. The limit of quantitation (LOQ) was as low as 10^-4 ng. Moreover, the molecular species of gangliosides in the liver, cortex, and hypothalamus of C57BL/6 mice were analyzed using the established method. A total of 23 ganglioside subclasses with 164 molecular species, including 40 O-acetylated ganglioside molecular species and 28 NeuGc ganglioside molecular species, were identified using the semi-quantitative analysis method of an external standard curve corrected by an internal standard. In addition to NeuGc gangliosides, the contents of ganglioside subclasses were more abundant in the mouse brain than those in the mouse liver; especially, the contents of unsaturated gangliosides in the hypothalamus were much higher than those in the liver. Among them, O-acetylated gangliosides were detected only in the cortex and hypothalamus at a concentration of up to 100 μg/mg protein (40 molecular species). Overall, the proposed method expanded the detectable number of ganglioside subclasses and molecular species in biological samples and provided more opportunities for further study of the biological functions of gangliosides.

01 Jul 2024·Journal of Dairy Science

Preparation of milk fat globule membrane ingredients enriched in polar lipids: Composition characterization and digestive properties

Article

Author: Li, Feng ; Zhao, Pu ; Wei, Wei ; Zhang, Shuwen ; Chen, Yun ; Ji, Guozhi ; Zhang, Li ; Lin, Ruixue ; Wang, Xingguo

In this study, milk fat globule membrane (MFGM) ingredients enriched in polar lipids were prepared using membrane filtration, including microfiltration, diafiltration, and ultrafiltration from butter serum powder. Polar lipids (phospholipids, sterols, and gangliosides) in prepared MFGM ingredients were analyzed by ³¹P nuclear magnetic resonance spectroscopy, GC-MS, and ultra-performance liquid chromatography (UPLC)-MS/MS, respectively. The lipolysis degree and microstructure of MFGM ingredient and soybean lecithin (SL) emulsions during in vitro digestion were also analyzed. Microfiltration showed higher concentration efficiency than ultrafiltration, which increased by 2.16% and 2.73% in phospholipids, respectively. Moreover, diafiltration concentrated more polar lipids (6.39% of phospholipids) than microfiltration. Milk fat globule membrane ingredients had high levels of sphingomyelin (1.27%-1.36%) and ratio of GD₃ to GM₃ is 9.25- to 9.88-fold. The different lipolysis behaviors between MFGM ingredient emulsions and SL emulsions were correlated with their different polar lipid compositions. Phospholipids from both MFGM ingredients and SL could help maintain the initial structure during the gastric digestion. These results could provide a scientific basis for developing high-polar-lipids food, particularly infant formulas and special functional foods.

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