A mechanism for low temperature induced sugar accumulation in stored potato tubers: The potential role of the alternative pathway and invertase

1996 ◽  
Vol 73 (10) ◽  
pp. 483-494 ◽  
Author(s):  
Patricia M. Duplessis ◽  
Alejandro G. Marangoni ◽  
Rickey Y. Yada
Keyword(s):  
Low Temperature ◽  
Potential Role ◽  
Alternative Pathway ◽  
Sugar Accumulation ◽  
Potato Tubers

Variable Sensitivity of Oral Isolates of Eikenella Corrodens to Serum Bactericidal Activity: Role of Antibody

1988 ◽  
Vol 2 (2) ◽  
pp. 346-353 ◽  
Author(s):  
C. Chen ◽  
M.E. Wilson
Keyword(s):  
Human Serum ◽  
Host Defense ◽  
Potential Role ◽  
Reference Strain ◽  
Alternative Pathway ◽  
Immune Defense ◽  
Classical Pathway ◽  
Eikenella Corrodens ◽  
Gram Negative

Eikenella corrodens is a facultatively anaerobic Gram-negative bacterium which is among the predominant cultivable microflora of periodontal lesions characterized by loss of attachment level. In the present study, we examined the potential role of complement-mediated killing in host defense against this periodontopathic organism. Seven clinical isolates obtained from human subgingival plaque and one reference strain of E. corrodens were characterized with respect to (a) susceptibility to the bactericidal properties of pooled human serum and (b) the role of the classical and/or alternative pathway(s) of complement in effecting killing of sensitive strains. Six strains, including the reference strain, were found to be variably serum-sensitive, exhibiting 1-12.5% survival after two hr of incubation in the presence of 20% pooled human serum. The remaining two isolates were serum-resistant. Both serum-resistant and serum-sensitive strains consumed complement via the classical pathway in normal but not in hypogammaglobulinemic serum, thus ruling out an antibody-independent mechanism of classical pathway activation. Four of six serum-sensitive strains exhibited little or no loss of viability following incubation with serum depleted of the classical pathway component Clq. One strain which was resistant to killing by normal human serum was, nevertheless, highly susceptible to complement-mediated killing in the presence of rabbit immune serum. Two additional serum-sensitive strains were killed, albeit to a lesser extent, in Clq-depleted serum, indicative of a role of the alternative pathway in killing of some serum-sensitive strains. These results indicate a potential role for complement-mediated killing in host defense against Gram-negative periodontal bacteria such as E. corrodens. However, the ultimate contribution of this immune defense mechanism may be defined, at least in part, by the presence of a humoral response to key bacterial membrane constituents.

Low Temperature Sweetening in Potato Tubers: the Role of the Amyloplast Membrane

1995 ◽  
Vol 145 (3) ◽  
pp. 335-341 ◽  
Author(s):  
Eileen P. O'Donoghue ◽  
Rickey Y. Yada ◽  
Alejandro G. Marangoni
Keyword(s):  
Low Temperature ◽  
Potato Tubers ◽  
Low Temperature Sweetening

scholarly journals Successful Infection of Domestic Pigs by Ingestion of the European Soft Tick O. Erraticus That Fed on African Swine Fever Virus Infected Pig

Viruses ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 300 ◽  
Author(s):  
Rémi Pereira De Oliveira ◽  
Evelyne Hutet ◽  
Maxime Duhayon ◽  
Jean-Marie Guionnet ◽  
Frédéric Paboeuf ◽  
...  
Keyword(s):  
Potential Role ◽  
African Swine Fever Virus ◽  
Alternative Pathway ◽  
African Swine Fever ◽  
Hemorrhagic Fever ◽  
Blood Feeding ◽  
Fever Virus ◽  
Soft Tick ◽  
Successful Infection

African swine fever is a highly lethal hemorrhagic fever of Suidae, threatening pig production globally. Suidae can be infected by different ways like ingestion of contaminated feed, direct contact with infected animals or fomites, and biting by infected soft tick bites. As already described, European soft ticks (Ornithodoros erraticus and Ornithodoros verrucosus) were not able to transmit African swine fever virus by biting pigs although these ticks maintained the infectious virus during several months; therefore, the possibility for pigs to become infected through the ingestion of infected ticks was questioned but not already explored. To determine if such oral ingestion is an alternative pathway of transmission, O. erraticus ticks were infected by blood-feeding on a viremic pig infected with the European African swine fever virus strain Georgia2007/1, then frozen at zero and two months post-engorgement, then after, were embedded in the food to pigs. Pig infection was successful, with superior efficiency with ticks frozen just after the infectious blood meal. These results confirmed the potential role of O. erraticus ticks as an ASFV reservoir and demonstrated the efficiency of non-conventional pathways of transmission.

The potential role of Annexin 3 in diapause embryo restart of Artemia sinica and in response to stress of low temperature

2019 ◽  
Vol 86 (5) ◽  
pp. 530-542 ◽  
Author(s):  
Na Li ◽  
Feng Yao ◽  
Huifang Huang ◽  
Hong Zhang ◽  
Wan Zhang ◽  
...  
Keyword(s):  
Low Temperature ◽  
Potential Role ◽  
Artemia Sinica ◽  
Response To Stress ◽  
Diapause Embryo

POPDC proteins and cardiac function

2019 ◽  
Vol 47 (5) ◽  
pp. 1393-1404 ◽  
Author(s):  
Thomas Brand
Keyword(s):  
Potential Role ◽  
Striated Muscle ◽  
Short Review ◽  
Effector Proteins ◽  
Muscle Disease ◽  
Disease Genes ◽  
Protein Protein Interaction ◽  
Interaction Partners ◽  
And Function

Abstract The Popeye domain-containing gene family encodes a novel class of cAMP effector proteins in striated muscle tissue. In this short review, we first introduce the protein family and discuss their structure and function with an emphasis on their role in cyclic AMP signalling. Another focus of this review is the recently discovered role of POPDC genes as striated muscle disease genes, which have been associated with cardiac arrhythmia and muscular dystrophy. The pathological phenotypes observed in patients will be compared with phenotypes present in null and knockin mutations in zebrafish and mouse. A number of protein–protein interaction partners have been discovered and the potential role of POPDC proteins to control the subcellular localization and function of these interacting proteins will be discussed. Finally, we outline several areas, where research is urgently needed.

The Effect of Path Length and Display Size on Memory for Spatial Information

2012 ◽  
Vol 59 (3) ◽  
pp. 147-152 ◽  
Author(s):  
Katherine Guérard ◽  
Sébastien Tremblay
Keyword(s):  
Path Length ◽  
Potential Role ◽  
Spatial Information ◽  
Recall Performance ◽  
Minor Role ◽  
Length Effect ◽  
Serial Memory ◽  
Fixed Reference ◽  
A Minor

In serial memory for spatial information, some studies showed that recall performance suffers when the distance between successive locations increases relatively to the size of the display in which they are presented (the path length effect; e.g., Parmentier et al., 2005) but not when distance is increased by enlarging the size of the display (e.g., Smyth & Scholey, 1994). In the present study, we examined the effect of varying the absolute and relative distance between to-be-remembered items on memory for spatial information. We manipulated path length using small (15″) and large (64″) screens within the same design. In two experiments, we showed that distance was disruptive mainly when it is varied relatively to a fixed reference frame, though increasing the size of the display also had a small deleterious effect on recall. The insertion of a retention interval did not influence these effects, suggesting that rehearsal plays a minor role in mediating the effects of distance on serial spatial memory. We discuss the potential role of perceptual organization in light of the pattern of results.

Sign in / Sign up

Export Citation Format

Share Document