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berghei

Retraction Note: Antimalarial efficacy of Pongamia pinnata (L) Pierre against Plasmodium falciparum (3D7 strain) and Plasmodium berghei (ANKA)

May 12, 2021 - 09:46 -- Open Access
Author(s): 
Satish PVV, Sunita K
Reference: 
BMC Complement Med Ther. 2021 May 10;21(1):139

No abstract available

Transmission-blocking compound candidates against Plasmodium vivax using P. berghei as an initial screening

February 11, 2021 - 09:21 -- Open Access
Author(s): 
Fabbri C, Trindade AO, Andrade FS, Souza MF, Ríos-Velásquez CM, Lacerda MVG, Monteiro WM, Costa FTM, Amino R, Lopes SCP
Reference: 
Mem Inst Oswaldo Cruz. 2021 Feb 8;116:e200513

Different strategies for improvement of malaria control and elimination are based on the blockage of malaria parasite transmission to the mosquito vector. These strategies include the drugs that target the plasmodial sexual stages in humans and the early developmental stages inside mosquitoes.

Plasmodium oocysts respond with dormancy to crowding and nutritional stress

February 8, 2021 - 10:41 -- Open Access
Author(s): 
Habtewold T, Sharma AA, Wyer CAS, Masters EKG, Windbichler N, Christophides GK
Reference: 
Sci Rep. 2021 Feb 4;11(1):3090

Malaria parasites develop as oocysts in the mosquito for several days before they are able to infect a human host. During this time, mosquitoes take bloodmeals to replenish their nutrient and energy reserves needed for flight and reproduction. We hypothesized that these bloodmeals are critical for oocyst growth and that experimental infection protocols, typically involving a single bloodmeal at the time of infection, cause nutritional stress to the developing oocysts. Therefore, enumerating oocysts disregarding their growth and differentiation state may lead to erroneous conclusions about the efficacy of transmission blocking interventions.

In-depth proteomic analysis of Plasmodium berghei sporozoites using trapped ion mobility spectrometry with parallel accumulation-serial fragmentation

January 20, 2021 - 06:20 -- Open Access
Author(s): 
Hamada S, Pionneau C, Parizot C, Silvie O, Chardonnet S, Marinach C
Reference: 
Proteomics. 2021 Jan 16:e2000305

Sporozoites of the malaria parasite Plasmodium are transmitted by mosquitoes and infect the liver for an initial and obligatory round of replication, before exponential multiplication in the blood and onset of the disease. Sporozoites and liver stages provide attractive targets for malaria vaccines and prophylactic drugs. In this context, defining the parasite proteome is important to explore the parasite biology and to identify potential targets for antimalarial strategies. Previous studies have determined the total proteome of sporozoites from the two main human malaria parasites, P. falciparum and P. vivax, as well as P. yoelii, which infects rodents.

NOT Open Access | Spiro-beta-lactam BSS-730A Displays Potent Activity against HIV and Plasmodium

January 5, 2021 - 15:12 -- NOT Open Access
Author(s): 
Bártolo I, Santos BS, Taveira N, et al.
Reference: 
ACS Infect Dis. 2021 Jan 4

The high burden of malaria and HIV/AIDS prevents economic and social progress in developing countries. A continuing need exists for development of novel drugs and treatment regimens for both diseases in order to address the tolerability and long-term safety concerns associated with current treatment options and the emergence of drug resistance.

NOT Open Access | A conserved malaria parasite antigen Pb22 plays a critical role in male gametogenesis in Plasmodium berghei

November 25, 2020 - 11:54 -- NOT Open Access
Author(s): 
Liu F, Yang F, Wang Y, Hong M, Zheng W, Min H, Li D, Jin Y, Tsuboi T, Cui L, Cao Y
Reference: 
Cell Microbiol. 2020 Nov 22:e13294

Gametogenesis, the formation of gametes from gametocytes, an essential step for malaria parasite transmission, is targeted by transmission-blocking drugs and vaccines. We identified a conserved protein (PBANKA_0305900) in Plasmodium berghei, which encodes a protein of 22 kDa (thus named Pb22) and is expressed in both asexual stages and gametocytes. Its homologs are present in all Plasmodium species and its closely related Hepatocystis, but not in other apicomplexans. Pb22 protein was localized in the cytosols of schizonts, as well as male and female gametocytes.

Chloroquine Potentiates Primaquine Activity Against Active and Latent Hepatic Plasmodia Ex vivo: Potentials and Pitfalls

October 21, 2020 - 09:26 -- Open Access
Author(s): 
Dembélé L, Franetich JF, Snounou G, et al.
Reference: 
Antimicrob Agents Chemother. 2020 Oct 19:AAC.01416-20

8-aminoquinoline compounds have long been the only therapeutic agents against latent hepatic malaria parasites. These have poor activity against the blood stage plasmodia causing acute malaria and must be used in conjunction with partner blood schizontocidal agents. We examined the impacts of one such agent, chloroquine, upon the activity of primaquine, an 8-aminoquinoline, against hepatic stages of Plasmodium cynomolgi, Plasmodium yoelii, Plasmodium berghei, and Plasmodium falciparum within several ex vivo systems: primary hepatocytes of Macaca fascicularis; primary human hepatocytes; and stably transformed human hepatocarcinoma cell line HepG2.

Caspase-8 mediates inflammation and disease in rodent malaria

September 16, 2020 - 13:03 -- Open Access
Author(s): 
Pereira LMN, Assis PA, Gazzinelli RT, et al.
Reference: 
Nat Commun. 2020 Sep 14;11(1):4596

Earlier studies indicate that either the canonical or non-canonical pathways of inflammasome activation have a limited role on malaria pathogenesis. Here, we report that caspase-8 is a central mediator of systemic inflammation, septic shock in the Plasmodium chabaudi-infected mice and the P. berghei-induced experimental cerebral malaria (ECM).

NOT Open Access | Blood-cerebrospinal fluid barrier: another site disrupted during experimental cerebral malaria caused by Plasmodium berghei ANKA

September 8, 2020 - 11:42 -- NOT Open Access
Author(s): 
Ngo-Thanh H, Sasaki T, Suzue K, Yokoo H, Isoda K, Kamitani W, Shimokawa C, Hisaeda H, Imai T
Reference: 
Int J Parasitol. 2020 Aug 31:S0020-7519(20)30247-2

Cerebral malaria (CM) is one of the most severe pathologies of malaria; it induces neuro-cognitive sequelae and has a high mortality rate. Although many factors involved in the development of CM have been discovered, its pathogenic mechanisms are still not completely understood. Most studies on CM have focused on the blood-brain barrier (BBB), despite the importance of the blood-cerebrospinal fluid barrier (BCSFB), which protects the brain from peripheral inflammation.

Not Open Access | In vitro and in vivo evaluation of the antimalarial MMV665831 and structural analogs

September 5, 2020 - 15:53 -- NOT Open Access
Author(s): 
Ding S, Fike KR, Klemba M, Carlier PR
Reference: 
Bioorg Med Chem Lett. 2020 Sep 1;30(17):127348

Antimalarial candidates possessing novel mechanisms of action are needed to control drug resistant Plasmodium falciparum. We were drawn to Malaria Box compound 1 (MMV665831) by virtue of its excellent in vitro potency, and twelve analogs were prepared to probe its structure–activity relationship. Modulation of the diethyl amino group was fruitful, producing compound 25, which was twice as potent as 1 against cultured parasites.

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