139 research outputs found
Patent pools and competition law : an examination of the enforcement strategies of competition authorities
"Mémoire présenté à la Faculté des études supérieures en vue de l'obtention du grade de maîtrise en droit, option recherche"In the past decade, we have seen a resurgence of patent pools. These pools have
emerged in our high-tech world to overcome a number of transaction costs involved
in assembling patents necessary for the creation of new technologies. While patent
pools can be pro-competitive; they can also present a number of anti-competitive
features, such as sheltering collusion and eliminating competition between rival
firms. This has been said to explain the enormous swings in the analytical approach
of enforcement agencies with respect to patent pools.
The introduction of the Antitrust Guidelines for the Licensing of Intellectual Property by
American competition authorities marked an important shift in patent pool
enforcement, reflecting the view that intellectual property and competition law are
actually complementary, both seeking to enhance innovation as well as competition.
Based on these Guidelines, enforcement agencies' identified potential problems and
have offered a number of guiding principles and recommendations - in the form of
Business Review Letters - to help pooling parties avoid running afoul of competition
law.
A review of some of these guidelines reveals that following them indiscriminately,
without regard to the particular circumstances, can in fact have a negative impact on
innovation and industry. Four areas where a clarification and refinement of policy
are necessary are highlighted; namely, the essentiality doctrine, pool, independent
licensing and grantback clauses. We maintain that guidance from the competition
authorities is too rigid, and that a more carefully tailored approach is necessary to
achieve an optimal outcome in both competition and innovation.Au cours de la dernière décennie, nous observons une renaissance de l'institution
des communautés de brevets (patent pools), constitués pour surmonter les coûts
afférents a la réunion des brevets nécessaires pour la création des nouvelles
technologies. Bien que ces communautés de brevets en général favorisent la
concurrence, elles peuvent aussi avoir des effets anti-concurrentiels, entre autre, en
permettant la collusion et l'Ă©limination de la concurrence entre compagnies rivales.
On a dit que ceci explique les Ă©tonnantes oscillations dans l'approche analytique
qu'ont adoptée les organismes d'application à l'égard des communautés de brevets.
L'introduction des Antitrust Guidelines for the Licensing of Intellectual Property par les
autorités de la concurrence américaines marque un point tournant dans l'analyse des communautés de brevets, reflétant le fait que les lois de la propriété intellectuelle et
celles de la concurrence sont, en réalité, complémentaires en ce qu'elles tendent
toutes les deux à améliorer l'innovation et la concurrence. Se basant sur ces lignes
directrices, les agences ont identifié les problèmes potentieis et ont offert un certain
nombre de directives et de recommandations sous forme de lettres de revue
(Business Review Letters) pour aider ceux qui entendent constituer des communautés
de brevets Ă Ă©viter d'enfreindre la Loi.
Toutefois, une révision de certaines de ces lignes directrices démontre que, suivies
d'une façon inconsiderées, sans égard aux circonstances particulières, elles peuvent
avoir un impact négatif sur l'innovation et l'industrie. Quatre sections ont été mises
en évidence où les règles doivent être clarifiées et nuancées, à savoir la doctrine de
l'essentialité, les droits d'exclusivité, les services indépendants délivrant les licences
et les clauses de rétrocession. Nous soutenons que les règles adoptées par les
autorités de la concurrence sont trop rigides et qu'une approche plus nuancée est
nécessaire pour atteindre un résultat optimal, à la fois pour la concurrence et pour
l'innovation
Single exon skipping can address a multi-exon duplication in the dystrophin gene
Duchenne muscular dystrophy (DMD) is a severe muscle wasting disease typically caused by protein-truncating mutations that preclude synthesis of a functional dystrophin. Exonic deletions are the most common type of DMD lesion, however, whole exon duplications account for between 10–15% of all reported mutations. Here, we describe in vitro evaluation of antisense oligonucleotide-induced splice switching strategies to re-frame the transcript disrupted by a multi-exon duplication within the DMD gene. Phosphorodiamidate morpholino oligomers and phosphorodiamidate morpholino oligomers coupled to a cell penetrating peptide were evaluated in a Duchenne muscular dystrophy patient cell strain carrying an exon 14–17 duplication. Two strategies were employed; the conventional approach was to remove both copies of exon 17 in addition to exon 18, and the second strategy was to remove only the first copy of exon 17. Both approaches result in a larger than normal but in-frame DMD transcript, but surprisingly, the removal of only the first exon 17 appeared to be more efficient in restoring dystrophin, as determined using western blotting. The emergence of a normal sized DMD mRNA transcript that was not apparent in untreated samples may have arisen from back splicing and could also account for some of the dystrophin protein being produced
Use of H19 Gene Regulatory Sequences in DNA-Based Therapy for Pancreatic Cancer
Pancreatic cancer is the eighth most common cause of death from cancer in the world, for which palliative treatments are not effective and frequently accompanied by severe side effects. We propose a DNA-based therapy for pancreatic cancer using a nonviral vector, expressing the diphtheria toxin A chain under the control of the H19 gene regulatory sequences. The H19 gene is an oncofetal RNA expressed during embryo development and in several types of cancer. We tested the expression of H19 gene in patients, and found that 65% of human pancreatic tumors analyzed showed moderated to strong expression of the gene. In vitro experiments showed that the vector was effective in reducing Luciferase protein activity on pancreatic carcinoma cell lines. In vivo experiment results revealed tumor growth arrest in different animal models for pancreatic cancer. Differences in tumor size between control and treated groups reached a 75% in the heterotopic model (P = .037) and 50% in the orthotopic model (P = .007). In addition, no visible metastases were found in the treated group of the orthotopic model. These results indicate that the treatment with the vector DTA-H19 might be a viable new therapeutic option for patients with unresectable pancreatic cancer
Recommended from our members
Integrating software architectures for distributed simulations and simulation analysis communities.
The one-year Software Architecture LDRD (No.79819) was a cross-site effort between Sandia California and Sandia New Mexico. The purpose of this research was to further develop and demonstrate integrating software architecture frameworks for distributed simulation and distributed collaboration in the homeland security domain. The integrated frameworks were initially developed through the Weapons of Mass Destruction Decision Analysis Center (WMD-DAC), sited at SNL/CA, and the National Infrastructure Simulation & Analysis Center (NISAC), sited at SNL/NM. The primary deliverable was a demonstration of both a federation of distributed simulations and a federation of distributed collaborative simulation analysis communities in the context of the same integrated scenario, which was the release of smallpox in San Diego, California. To our knowledge this was the first time such a combination of federations under a single scenario has ever been demonstrated. A secondary deliverable was the creation of the standalone GroupMeld{trademark} collaboration client, which uses the GroupMeld{trademark} synchronous collaboration framework. In addition, a small pilot experiment that used both integrating frameworks allowed a greater range of crisis management options to be performed and evaluated than would have been possible without the use of the frameworks
Myelin-associated glycoprotein gene mutation causes Pelizaeus-Merzbacher disease-like disorder
Pelizaeus-Merzbacher disease is an X-linked hypomyelinating leukodystrophy. Lossos et al. describe a family with an early-onset Pelizaeus-Merzbacher disease-like phenotype that slowly evolves into complicated hereditary spastic paraplegia, affecting both the CNS and PNS. Exome sequencing reveals a causative homozygous missense mutation in MAG, which encodes myelin associated glycoprotei
Complement-membrane regulatory proteins are absent from the nodes of Ranvier in the peripheral nervous system
Background: Homozygous CD59-deficient patients manifest with recurrent peripheral neuropathy resembling Guillain-Barré syndrome (GBS), hemolytic anemia and recurrent strokes. Variable mutations in CD59 leading to loss of function have been described and, overall, 17/18 of patients with any mutation presented with recurrent GBS. Here we determine the localization and possible role of membrane-bound complement regulators, including CD59, in the peripheral nervous systems (PNS) of mice and humans. Methods: We examined the localization of membrane-bound complement regulators in the peripheral nerves of healthy humans and a CD59-deficient patient, as well as in wild-type (WT) and CD59a-deficient mice. Cross sections of teased sciatic nerves and myelinating dorsal root ganglia (DRG) neuron/Schwann cell cultures were examined by confocal and electron microscopy. Results: We demonstrate that CD59a-deficient mice display normal peripheral nerve morphology but develop myelin abnormalities in older age. They normally express myelin protein zero (P0), ankyrin G (AnkG), Caspr, dystroglycan, and neurofascin. Immunolabeling of WT nerves using antibodies to CD59 and myelin basic protein (MBP), P0, and AnkG revealed that CD59 was localized along the internode but was absent from the nodes of Ranvier. CD59 was also detected in blood vessels within the nerve. Finally, we show that the nodes of Ranvier lack other complement-membrane regulatory proteins, including CD46, CD55, CD35, and CR1-related gene-y (Crry), rendering this area highly exposed to complement attack. Conclusion: The Nodes of Ranvier lack CD59 and are hence not protected from complement terminal attack. The myelin unit in human PNS is protected by CD59 and CD55, but not by CD46 or CD35. This renders the nodes and myelin in the PNS vulnerable to complement attack and demyelination in autoinflammatory Guillain-Barré syndrome, as seen in CD59 deficiency
The non-coding transcriptome as a dynamic regulator of cancer metastasis.
Since the discovery of microRNAs, non-coding RNAs (NC-RNAs) have increasingly attracted the attention of cancer investigators. Two classes of NC-RNAs are emerging as putative metastasis-related genes: long non-coding RNAs (lncRNAs) and small nucleolar RNAs (snoRNAs). LncRNAs orchestrate metastatic progression through several mechanisms, including the interaction with epigenetic effectors, splicing control and generation of microRNA-like molecules. In contrast, snoRNAs have been long considered "housekeeping" genes with no relevant function in cancer. However, recent evidence challenges this assumption, indicating that some snoRNAs are deregulated in cancer cells and may play a specific role in metastasis. Interestingly, snoRNAs and lncRNAs share several mechanisms of action, and might synergize with protein-coding genes to generate a specific cellular phenotype. This evidence suggests that the current paradigm of metastatic progression is incomplete. We propose that NC-RNAs are organized in complex interactive networks which orchestrate cellular phenotypic plasticity. Since plasticity is critical for cancer cell metastasis, we suggest that a molecular interactome composed by both NC-RNAs and proteins orchestrates cancer metastasis. Interestingly, expression of lncRNAs and snoRNAs can be detected in biological fluids, making them potentially useful biomarkers. NC-RNA expression profiles in human neoplasms have been associated with patients' prognosis. SnoRNA and lncRNA silencing in pre-clinical models leads to cancer cell death and/or metastasis prevention, suggesting they can be investigated as novel therapeutic targets. Based on the literature to date, we critically discuss how the NC-RNA interactome can be explored and manipulated to generate more effective diagnostic, prognostic, and therapeutic strategies for metastatic neoplasms
Biallelic variants in the ectonucleotidase ENTPD1 cause a complex neurodevelopmental disorder with intellectual disability, distinct white matter abnormalities, and spastic paraplegia.
OBJECTIVE: Human genomics established that pathogenic variation in diverse genes can underlie a single disorder. For example, hereditary spastic paraplegia (HSP) is associated with over 80 genes with frequently only few affected individuals described for each gene. Herein, we characterize a large cohort of individuals with biallelic variation in ENTPD1, a gene previously linked to spastic paraplegia 64 (MIM# 615683). METHODS: Individuals with biallelic ENTPD1 variants were recruited worldwide. Deep phenotyping and molecular characterizations were performed. RESULTS: A total of 27 individuals from 17 unrelated families were studied; additional phenotypic information was collected from published cases. Twelve novel pathogenic ENTPD1 variants are described: c.398_399delinsAA; p.(Gly133Glu), c.540del; p.(Thr181Leufs* 18), c.640del; p.(Gly216Glufs* 75), c.185T>G; p.(Leu62*), c.1531T>C; p.(*511Glnext* 100), c.967C>T; p.(Gln323*), c.414-2_414-1del, and c.146 A>G; p.(Tyr49Cys) including four recurrent variants c.1109T>A; p.(Leu370* ), c.574-6_574-3del, c.770_771del; p.(Gly257Glufs*18), and c.1041del; p.(Ile348Phefs*19). Shared disease traits include: childhood-onset, progressive spastic paraplegia, intellectual disability (ID), dysarthria, and white matter abnormalities. In vitro assays demonstrate that ENTPD1 expression and function are impaired and that c.574-6_574-3del causes exon skipping. Global metabolomics demonstrates ENTPD1 deficiency leads to impaired nucleotide, lipid, and energy metabolism. INTERPRETATION: The ENTPD1 locus trait consists of childhood disease-onset, ID, progressive spastic paraparesis, dysarthria, dysmorphisms, and white matter abnormalities with some individuals showing neurocognitive regression. Investigation of an allelic series of ENTPD1: i) expands previously described features of ENTPD1-related neurological disease, ii) highlights the importance of genotype-driven deep phenotyping, iii) documents the need for global collaborative efforts to characterize rare AR disease traits, and iv) provides insights into the disease trait neurobiology. This article is protected by copyright. All rights reserved
- …