Anabolic Steroids Used for Weight Gain of HIV Patients

People with HIV suffer from a condition referred to as HIV wasting. This condition is characterized by involuntary loss of about 10% of the total body weight, often coupled with prolonged diarrhea, fever, or weakness. In HIV wasting, the weight loss is attributed to the loss of lean body mass or muscle mass.anabolic steroids

HIV wasting is caused by several factors, one of which is reduced food intake. HIV patients usually consume less food because they have low appetite. Furthermore, the medicines they take also have side effects that make them eat less.

Another factor that causes wasting in HIV patients is that their small intestine, affected by infections brought about by the disease, does not absorb nutrients effectively anymore. Finally, HIV patients experience wasting because their body?s metabolism is altered. The disease affects the way their body processes food and builds up protein.

A study conducted in 2005 showed that HIV patients have a chance to gain the weight they lost to wasting. This can be made possible by treating them with anabolic steroids.
The study involved HIV patients with ages ranging from 24 to 42. A total of 294 individuals were given anabolic steroids, which they took for 6 weeks, while 238 individuals were given the placebo. At the end of the study, those who took the anabolic steroids showed weight gain of almost three pounds.

According to medical experts, this amount of weight gained because of steroid intake is clinically relevant. This positive result has birthed the hope that more of the weight lost because of wasting can be regained by longer treatment of anabolic steroids.

Although more research is needed to establish this principle, the result of the study definitely brings good news to HIV patients. Scientists and medical experts have been trying for a long time to reverse the effect of HIV wasting, which can lead to extreme muscle loss and weakness. Wasting can even cause organs to fail and make the patient die more quickly. People with HIV or AIDS suffer from reduced testosterone levels, and their bodies are unable to build muscle mass.

So what are anabolic steroids? These are synthetic steroids that have the same characteristics as testosterone, which is the male sex hormone. They help the body to grow skeletal muscles.

Anabolic steroids have been made largely unpopular primarily because athletes misuse and abuse these products. However, they do have important medical applications and are being used to treat certain medical conditions like low testosterone level for men and anemia. Now this study involving the use of anabolic steroids for the treatment of HIV wasting proves once again that these substances have a significant role in the field of medicine.

In this study, the patients either took the anabolic steroids orally or through an injection. The side effects reported include acne, mood swings, slight increase in growth of body hair, aggressiveness, abnormal liver function tests, and irritability, which are all common manifestations of using anabolic steroids.

More study is needed to confirm if the weight gain caused by anabolic steroid intake will bring about an improvement in the patient?s quality of life. Experts also still need to determine how much gain weight translates to a successful result of treatment with anabolic steroids.

Human Diseases Caused by Viruses

When a cell is infected with a virus several effects may be seen. Many viruses cause no harm or disease whatsoever. However, some viruses may attack certain cells and multiply within them.

Once mature the daughter viruses break the cell and spread elsewhere. This is called a lytic infection. Eventually, if host immunity operates effectively, the virus-infected cell may be killed by the host, leading to interruption of the virus cycle and cure of the infection. However, this is not true for all viral infections.

The viruses may persist in the cell without damaging it and make the cell a carrier. The patient may appear to be cured but the infection persists and can spread to others. In addition, the infection may reappear later after this period of lull or latency.

Spread of viruses
Viruses cannot exist on their own and for survival they need to spread to another host. This is because the original host may either die or eliminate the infection. Some important routes of viral transfer include:
Route                                                                     Examples
Skin contact                                                         HPV (warts)
Respiratory                              Cold virusues, influenza, measles, mumps, rubella
Faecal-oral                                 Polio, echo, Coxsackie, Hepatitis A, Rotavirus
Milk                                                                 HIV, HTLV-1, CMV
Transplacental                                                Rubella, CMV, HIV
Sexually                                           Herpes 1 and 2, HIV, HPV, Hepatitis B
Insect vector                                            Yellow fever, Dengue fever
Animal bite                                                              Rabies

In addition, in order to spread the viruses also need to withstand the immune system. A special category of viruses is those that cause disease only when the immune system is deficient in some way; these are called opportunists, and  opportunistic infection is one of the main problems in patients with, for example, AIDS.

Where do viruses reside?

There are several viruses that have an animal or plant reservoir from where they affect humans. Some of the common reservoirs of viruses include;
Virus                                                            Animal reservoir
Influenza                                                     Birds, pigs, horses
Rabies                                                          Bats, dogs, foxes
Lassa and Hanta viruses                                    Rodents
Ebola and marburg viruses                               Monkeys
HIV-1 and -2                                            Chimpanzees, monkeys
Newcastle disease                                              Poultry
West Nile virus                                                     Birds


Host defence to viral infections
The body's first line of defence against viruses is the innate immune system. This is made up of cells and other mechanisms that defend the host from infection. This provides a temporary protection against the viral onslaught.

Once within the adaptive immunity faces the virus and remembers it. This is a more permanent form of immunity that may last a life time against the particular strain of virus. Specific antibodies are produced against the virus.
 This is called humoral immunity.

Two types of antibodies are important. The first called IgM is highly effective at neutralizing viruses but is only produced by the cells of the immune system for a few weeks. The one that lasts a life time is the IgG antibodies.

The second line of defence is called cell-mediated immunity and involves immune cells known as T cells. T cell recognises a suspicious viral fragment there and the killer T cells destroy the virus.

Virus spread control
Viral diseases can be prevented from spreading by vaccinations and the most successful of these is the small pox vaccine that has completely eradicated the disease in 1980. It is hoped that several other viruses, such as polio and measles, will follow.

Epidemics and pandemics of viral infections
Spread or outbreak of a viral infection in a community is termed an epidemic. A pandemic occurs when there is a worldwide epidemic.

The 1918 flu pandemic, commonly referred to as the Spanish flu was such a pandemic. It was caused by an unusually severe and deadly influenza A virus. The victims were often healthy young adults in contrast from weakened and elderly who are usual victims. It killed around 100 million people or at least 5% of the world's population in 1918.

HIV is now considered a pandemic with an estimated 38.6 million people now living with the disease worldwide.

Viruses and cancer
Some viruses may incorporate their DNA (or DNA copied from viral RNA) into host DNA, with effects on the control of cell growth. This may sometimes lead to transformation, in other words a tumour.

However, integration does not always lead to transformation and is not mandatory for transformation. The association of viruses with tumours in animals was first suspected 90 years ago but only in the 1960s was a virus (EBV) shown convincingly to be associated with a human tumour (Burkitt’s lymphoma).

Now the role of oncogenes that are activated for causing cancer is being better understood to know why all viruses and all infections do not cause cancer in all individuals.

Treatment of viral infections
Several antiviral drugs that are used to treat viral infections have been developed over the past two decades. Many of these are focussed against HIV. These do not cure HIV infection but stop the virus from multiplying and prevent the progress of the disease. Another notable antiviral drug is Ribavarin against hepatitis C.

Viruses in general are notoriously difficult drug targets as they modify and adapt themselves rapidly to build up a resistance against the drug. Case in point is Oseltamivir (trade name - Tamiflu) used in influenza.