Comparison of 1% chloroprocaine hydrochloride versus hyperbaric bupivacaine spinal in patients undergoing anorectal surgery in an ambulatory surgery center: a double-blind randomized clinical trial.

Background: Preservative-free chloroprocaine is a promising spinal anesthetic for ambulatory surgeries, offering a short duration of action and minimal side effects, which promote faster recovery and discharge. Thus, this study aimed to compare chloroprocaine hydrochloride to the widely used bupivacaine as a spinal anesthetic in ambulatory anorectal surgeries. We hypothesized that chloroprocaine will lead to quicker recovery and discharge, supporting its use in the ambulatory surgical setting.

Reducing flight upset risk and startle response: A study of the wake vortex alert with licensed commercial pilots.

The study aimed at investigating the impact of an innovative Wake Vortex Alert (WVA) avionics on pilots' operation and mental states, intending to improve aviation safety by mitigating the risks associated with wake vortex encounters (WVEs). Wake vortices, generated by jet aircraft, pose a significant hazard to trailing or crossing aircrafts. Despite existing separation rules, incidents involving WVEs continue to occur, especially affecting smaller aircrafts like business jets, resulting in aircraft upsets and occasional cabin injuries.

Regional Anesthesia Techniques for Shoulder Surgery in High-Risk Pulmonary Patients.

Patients with pre-existing pulmonary conditions are at risk for experiencing perioperative complications and increased morbidity. General anesthesia has historically been used for shoulder surgery, though regional anesthesia techniques are increasingly used to provide anesthesia and improved pain control after surgery. Relative to regional anesthesia, patients who undergo general anesthesia may be more prone to risks of barotrauma, postoperative hypoxemia, and pneumonia.

Loss of Coupling Distinguishes GJB1 Mutations Associated with CNS Manifestations of CMT1X from Those Without CNS Manifestations.

CMT1X, an X-linked inherited neuropathy, is caused by mutations in GJB1, which codes for Cx32, a gap junction protein expressed by Schwann cells and oligodendrocytes. Many GJB1 mutations cause central nervous system (CNS) abnormality in males, including stable subclinical signs and, less often, short-duration episodes characterized by motor difficulties and altered consciousness. However, some mutations have no apparent CNS effects.

Platelet-derived growth factor production by cells from Dacron grafts implanted in a canine model.

Purpose: Previous studies of grafts implanted in dogs documented a time-dependent increase in platelet-derived growth factor (PDGF) production that correlated with inner-capsule thickness. The purpose of this study was to identify the cells in vascular grafts that produce PDGF.

Methods: Dacron thoracoabdominal grafts were seeded with autologous endothelial cells (ECs), implanted in 11 beagles, and removed after 4 or 20 weeks.

The gene encoding topoisomerase II from Plasmodium falciparum.

The gene for topoisomerase II has been isolated from genomic libraries of strain K1 of the human malarial parasite, Plasmodium falciparum. The sequence reveals an open reading frame of 4194 nucleotides which predicts a polypeptide of 1398 amino acids. There are apparently no introns.

The gene encoding DNA polymerase alpha from Plasmodium falciparum.

The gene encoding DNA polymerase alpha from the human malaria parasite Plasmodium falciparum has been sequenced and characterised. The deduced amino acid sequence possesses the seven sequence motifs which characterise eukaryotic replicative DNA polymerases (I-VII) and four of five motifs (A-E) identified in alpha DNA polymerases. The predicted protein also contains sequences which are reminiscent of Plasmodium proteins but absent from other DNA polymerases.

Molecular characterisation and stage-specific expression of proliferating cell nuclear antigen (PCNA) from the malarial parasite, Plasmodium falciparum.

The gene encoding the malarial homologue of proliferating cell nuclear antigen, PCNA, has been identified and characterised. It is located on chromosome 13. The coding sequence of 825 nucleotides predicts a protein of 30,586 Da.

Pyrimethamine resistant mutations in Plasmodium falciparum.

Three mutations in Plasmodium falciparum yielding increased resistance to pyrimethamine were obtained following treatment with chemical mutagens and selection in presence of pyrimethamine. From parasite clone TM4/8.2 a mutant, TM4/8.

DNA polymerase delta: gene sequences from Plasmodium falciparum indicate that this enzyme is more highly conserved than DNA polymerase alpha.

Genes encoding proteins homologous to the catalytic subunits of DNA polymerase alpha and delta have been cloned from the human malaria parasite Plasmodium falciparum. These are among the first cellular replicative DNA polymerase genes to be cloned and their sequences allow us to make new statements about the relative degrees of conservation of these two enzymes. The most important finding was that P.

An exported protein of Plasmodium falciparum is synthesized as an integral membrane protein.

Exp-1 is an antigen of Plasmodium falciparum which is transported from the parasite cell to the membrane of the parasitophorous vacuole and to membranous compartments in the erythrocyte. To investigate how this protein is transported, we studied the synthesis and membrane translocation of exp-1 in a cell-free system. The protein was translocated into canine pancreatic microsomes.

The complete sequence of a Plasmodium malariae SSUrRNA gene and its comparison to other plasmodial SSUrRNA genes.

A gene encoding the small subunit rRNA (SSUrRNA) has been isolated from the human parasite, Plasmodium malariae. The gene has been sequenced. It contains conserved and variable regions which conform to patterns established for other eukaryotic SSUrRNA genes.

Expression of alpha and beta tubulin genes during the asexual and sexual blood stages of Plasmodium falciparum.

Malaria parasites switch to sexual development after a period of vegetative growth in the host's erythrocytes. This switch, vital for parasite transmission to mosquitoes, is little understood at the genetic level. Likely candidates for developmental control are the alpha- and beta-tubulin subunits required for microtubule assembly.

Characterisation and sequence of a protective rhoptry antigen from Plasmodium falciparum.

We have recently demonstrated that a non-polymorphic rhoptry antigen, RAP-1 (rhoptry associated protein-1), which is recognised by human immune serum, can successfully protect Saimiri monkeys from a lethal infection of Plasmodium falciparum malaria. In this report we further characterise the antigen, which consists of four major proteins of 80, 65, 42 and 40 kDa and two minor proteins of 77 and 70 kDa, and present the antigen's gene sequence. Monoclonal antibody evidence, autocatalytic processing and immunological cross-reactivity suggest that all components of this antigen are derived from the same precursor protein.

Cloning of a beta-tubulin gene from Plasmodium falciparum.

We describe the isolation and characterization of a gene for beta-tubulin from the malaria parasite, Plasmodium falciparum. This organism appears to contain a single gene encoding beta-tubulin. A single transcript from this gene can be detected in the total RNA of the parasite's asexual blood stages.

Identification of Plasmodium falciparum-infected mosquitoes using a probe containing repetitive DNA.

A cloned repetitive DNA sequence (rep20) was evaluated as a diagnostic probe specific for Plasmodium falciparum sporozoites using experimentally infected mosquitoes squashed directly on nylon filters. Head/thorax portions of mosquitoes, killed 14-16 days after ingesting P. falciparum-infected blood, gave positive signals when examined for the presence of P.

Allelic dimorphism in a surface antigen gene of the malaria parasite Plasmodium falciparum.

Merozoites of the malaria parasite Plasmodium falciparum carry surface proteins processed from a precursor termed p190 or p195. Polymorphism has been reported in this protein. Since the protein is a candidate for a malaria vaccine, it is important to understand the nature of this polymorphism.

Characterisation of a repetitive DNA sequence from the malaria parasite, Plasmodium falciparum.

A repetitive DNA fragment cloned from the malaria parasite, Plasmodium falciparum, has been analysed. It contains a 21 base pair sequence which occurs in multiple tandem repeats. Two clusters of the same repeat are found in opposite orientations on the same DNA fragment.

Polymorphism of the precursor for the major surface antigens of Plasmodium falciparum merozoites: studies at the genetic level.

The gene for the precursor of Plasmodium falciparum merozoite surface antigens has been cloned. The entire sequence of the gene from a Thai isolate of the parasite is reported. It provides evidence for a signal peptide, a region containing short repeating peptides and an anchor sequence.

Cloning studies on the gene coding for L-(+)-lactate dehydrogenase of Plasmodium falciparum.

We show that the L-(+)-lactate dehydrogenase (EC 1.1.1.

The gene for an exported antigen of the malaria parasite Plasmodium falciparum cloned and expressed in Escherichia coli.

An exported protein of the erythrocytic stages of the malaria parasite, Plasmodium falciparum, has epitope(s) in common with the surface of the sporozoite stage (1). Two cDNA clones encoding this protein, Ag5.1, have now been isolated and expressed in Escherichia coli.

Major surface antigen gene of a human malaria parasite cloned and expressed in bacteria.

The late blood stages of the human malaria parasite, Plasmodium falciparum, carry a major surface antigen, p190, of molecular weight (Mr) 190,000. This antigenically variable protein is actively processed, first as the parasite matures and again when it is released into the blood stream and invades a new erythrocyte to initiate a cycle of growth. It elicits a strong immune response in man; all tested adult sera from endemic areas have antibodies against this protein.

Characterisation and translation studies of messenger RNA from the human malaria parasite Plasmodium falciparum and construction of a cDNA library.

RNA was isolated from trophozoites, schizonts and mixed populations of Plasmodium falciparum. 5% of the total was poly(A+) message, of average length 1.2 kb (10-12 kb maximum) and a poly(A) content of 10%.

Cloning and characterisation of the rRNA genes from the human malaria parasite Plasmodium falciparum.

Ribosomal DNA fragments from the human malaria parasite Plasmodium falciparum have been cloned and analysed in detail. Restriction mapping shows that the cloned fragments are different. However, they do have some similarities, in particular a small stretch of A+T-rich DNA located between the small and large subunit rRNA genes.