@article{fdi:010037709, title = {{I}ncreased melanizing activity in {A}nopheles gambiale does not affect development of {P}lasmodium falciparum}, author = {{M}ichel, {K}. and {S}uwanchaichinda, {C}. and {M}orlais, {I}sabelle and {L}ambrechts, {L}. and {C}ohuet, {A}nna and {A}wono-{A}mbene, {P}. and {S}imard, {F}r{\'e}d{\'e}ric and {F}ontenille, {D}idier and {K}anost, {M}.{R}. and {K}afatos, {F}.{C}.}, editor = {}, language = {{ENG}}, abstract = {{S}erpins are central to the modulation of various innate immune responses in insects and are suspected to influence the outcome of malaria parasite infection in mosquito vectors. {T}hree {A}nopheles gambiae serpins ({SRPN}1, -2, and -3) were tested for their ability to inhibit the prophenoloxidase cascade, a key regulatory process in the melanization response. {R}ecombinant {SPRN}1 and -2 can bind and inhibit a heterologous phenoloxiclase-activating protease and inhibit phenoloxidase activation in vitro. {U}sing a reverse genetics approach, we studied the effect of {SRPN}2 on melanization in {A}n. gambiae adult females in vivo. {D}epletion of {SRPN}2 from the mosquito hemolymph increases melanin deposition on foreign surfaces such as negatively charged {S}ephadex beads. {A}s reported, the knockdown of {SRPN}2 adversely affects the ability of the rodent malaria parasite {P}lasmodium berghei to invade the midgut epithelium and develop into oocysts. {I}mportantly, we tested whether the absence of {SRPN}2 from the hemolymph influences {P}lasmodium falciparum development. {RNA}i silencing of {SRPN}2 in an {A}n. gambiae strain originally established from local populations in {Y}aounde, {C}ameroon, did not influence the development of autochthonous field isolates of {P}. falciparum. {T}his study suggests immune evasion strategies of the human malaria parasite and emphasizes the need to study mosquito innate immune responses toward the pathogens they transmit in natural vector-parasite combinations.}, keywords = {innate immunity ; malaria ; mosquito ; serpin}, booktitle = {}, journal = {{P}roceedings of the {N}ational {A}cademy of {S}ciences of the {U}nited {S}tates of {A}merica}, volume = {103}, numero = {45}, pages = {16858--16863}, ISSN = {0027-8424}, year = {2006}, DOI = {10.1073/pnas.0608033103}, URL = {https://www.documentation.ird.fr/hor/fdi:010037709}, }