The Prevalence of Rhesus-Negative Blood Group Among Patient With Small Cell Lung Cancer and Analysis of Its Effect on Overall Survival

Erythroprotective Potential of Phycobiliproteins Extracted from Porphyridium cruentum

There are multiple associations between the different blood groups (ABO and RhD) and the incidence of oxidative stress-related diseases, such as certain carcinomas and COVID-19. Bioactive compounds represent an alternative to its prevention and treatment. Phycobiliproteins (PBP) are bioactive compounds present in the microalga Porphyridium cruentum and, despite its antioxidant activity, their inhibitory effect on hemolysis has not been reported. The aim of this work was to evaluate the erythroprotective potential of phycobiliproteins from P. cruentum in different blood groups. The microalga was cultured in F/2 medium under controlled laboratory conditions. Day 10 of culture was determined as the harvest point. The microalgal biomass was lyophilized and a methanolic (MetOH), Tris HCl (T-HCl), and a physiological solution (PS) ultrasound-assisted extraction were performed. Extract pigments were quantified by spectrophotometry. The antioxidant activity of the extracts was evaluated with the ABTS+•, DPPH•, and FRAP methods, finding that the main antioxidant mechanism on the aqueous extracts was HAT (hydrogen atom transfer), while for MetOH it was SET (single electron transfer). The results of the AAPH, hypotonicity, and heat-induced hemolysis revealed a probable relationship between the different antigens (ABO and RhD) with the antihemolytic effect, highlighting the importance of bio-directed drugs.

Effects of message framing on recruiting Rh-D-negative blood donors in an emergency situation: Two randomized trials

OBJECTIVES

Prospect theory categorizes message framing according to whether it emphasizes a possible loss or a possible gain. Promotions of blood donation worldwide mainly focus on gain-framed appeal. The objective of the current study is to examine the effects of message framing on recruiting Rh-D-negative blood donors (RDNBDs) in an emergency situation.

DESIGN

Two randomized trials.

METHODS

In Study 1, 813 group O and 500 group B RDNBDs were randomly assigned to three groups receiving three different recruitment text messages: (1) gain-framed, (2) loss-framed, and (3) information messages. In addition, 613 group A and 148 group AB RDNBDs were marked as (4) no message group. In Study 2, 758 RDNBDs were randomly provided one of two versions of materials focusing on either the possible survival (gain-framed) or the death (loss-framed) of a Rh-D-negative patient needed a blood transfusion. These participants then completed a questionnaire to examine the possible mechanisms underlying the observed effects.

RESULTS

Compared to not receiving any message, significantly more RDNBDs re-donated within 14 days after they received a loss-framed message. Study 2 found that RDNBDs who read the loss-framed material expressed more willingness to donate immediately than those who read the gain-framed material. RDNBDs with high-risk perception expressed a greater blood donation intention in the loss-framed group. The loss-framed message made participants perceive others' needs more strongly, which generated more empathy, and thus increased blood donation intention.

CONCLUSIONS

The results suggested that recruiting RDNBDs using a loss-framed message is suitable under an emergency.